diff --git a/Makefile b/Makefile index 8d13b9890..7c055ffae 100644 --- a/Makefile +++ b/Makefile @@ -48,9 +48,6 @@ styles: @lessc -x searx/static/themes/default/less/style.less > searx/static/themes/default/css/style.css @lessc -x searx/static/themes/courgette/less/style.less > searx/static/themes/courgette/css/style.css @lessc -x searx/static/less/bootstrap/bootstrap.less > searx/static/css/bootstrap.min.css - @lessc -x searx/static/less/bootstrap/bootstrap_simplex.less > searx/static/css/bootstrap.simplex.min.css - @lessc -x searx/static/less/bootstrap/bootstrap_yeti.less > searx/static/css/bootstrap.yeti.min.css - @lessc -x searx/static/less/bootstrap/bootstrap_readable.less > searx/static/css/bootstrap.readable.min.css @lessc -x searx/static/themes/oscar/less/oscar/oscar.less > searx/static/themes/oscar/css/oscar.min.css grunt: diff --git a/searx/static/css/bootstrap.min.css b/searx/static/css/bootstrap.min.css index 691604be6..fb0e84ae4 100644 Binary files a/searx/static/css/bootstrap.min.css and b/searx/static/css/bootstrap.min.css differ diff --git a/searx/static/css/bootstrap.readable.min.css b/searx/static/css/bootstrap.readable.min.css deleted file mode 100644 index 41fd654a8..000000000 Binary files a/searx/static/css/bootstrap.readable.min.css and /dev/null differ diff --git a/searx/static/css/bootstrap.simplex.min.css b/searx/static/css/bootstrap.simplex.min.css deleted file mode 100644 index 2a34b36ff..000000000 Binary files a/searx/static/css/bootstrap.simplex.min.css and /dev/null differ diff --git a/searx/static/css/bootstrap.yeti.min.css b/searx/static/css/bootstrap.yeti.min.css deleted file mode 100644 index e98a99e62..000000000 Binary files a/searx/static/css/bootstrap.yeti.min.css and /dev/null differ diff --git a/searx/static/less/bootstrap/bootstrap_readable.less b/searx/static/less/bootstrap/bootstrap_readable.less deleted file mode 100644 index cb504f3e3..000000000 --- a/searx/static/less/bootstrap/bootstrap_readable.less +++ /dev/null @@ -1,55 +0,0 @@ -// Core variables and mixins -@import "variables.less"; -@import "theme_readable/variables.less"; -@import "mixins.less"; - -// Reset and dependencies -@import "normalize.less"; -@import "print.less"; -@import "glyphicons.less"; - -// Core CSS -@import "scaffolding.less"; -@import "type.less"; -@import "code.less"; -@import "grid.less"; -@import "tables.less"; -@import "forms.less"; -@import "buttons.less"; - -// Components -@import "component-animations.less"; -@import "dropdowns.less"; -@import "button-groups.less"; -@import "input-groups.less"; -@import "navs.less"; -@import "navbar.less"; -@import "breadcrumbs.less"; -@import "pagination.less"; -@import "pager.less"; -@import "labels.less"; -@import "badges.less"; -@import "jumbotron.less"; -@import "thumbnails.less"; -@import "alerts.less"; -@import "progress-bars.less"; -@import "media.less"; -@import "list-group.less"; -@import "panels.less"; -@import "responsive-embed.less"; -@import "wells.less"; -@import "close.less"; - -// Components w/ JavaScript -@import "modals.less"; -@import "tooltip.less"; -@import "popovers.less"; -@import "carousel.less"; - -// Utility classes -@import "utilities.less"; -@import "responsive-utilities.less"; - -// own additions -@import "typeahead.less"; -@import "theme_readable/bootswatch.less"; diff --git a/searx/static/less/bootstrap/bootstrap_simplex.less b/searx/static/less/bootstrap/bootstrap_simplex.less deleted file mode 100644 index 4390b668d..000000000 --- a/searx/static/less/bootstrap/bootstrap_simplex.less +++ /dev/null @@ -1,55 +0,0 @@ -// Core variables and mixins -@import "variables.less"; -@import "theme_simplex/variables.less"; -@import "mixins.less"; - -// Reset and dependencies -@import "normalize.less"; -@import "print.less"; -@import "glyphicons.less"; - -// Core CSS -@import "scaffolding.less"; -@import "type.less"; -@import "code.less"; -@import "grid.less"; -@import "tables.less"; -@import "forms.less"; -@import "buttons.less"; - -// Components -@import "component-animations.less"; -@import "dropdowns.less"; -@import "button-groups.less"; -@import "input-groups.less"; -@import "navs.less"; -@import "navbar.less"; -@import "breadcrumbs.less"; -@import "pagination.less"; -@import "pager.less"; -@import "labels.less"; -@import "badges.less"; -@import "jumbotron.less"; -@import "thumbnails.less"; -@import "alerts.less"; -@import "progress-bars.less"; -@import "media.less"; -@import "list-group.less"; -@import "panels.less"; -@import "responsive-embed.less"; -@import "wells.less"; -@import "close.less"; - -// Components w/ JavaScript -@import "modals.less"; -@import "tooltip.less"; -@import "popovers.less"; -@import "carousel.less"; - -// Utility classes -@import "utilities.less"; -@import "responsive-utilities.less"; - -// own additions -@import "typeahead.less"; -@import "theme_simplex/bootswatch.less"; diff --git a/searx/static/less/bootstrap/bootstrap_yeti.less b/searx/static/less/bootstrap/bootstrap_yeti.less deleted file mode 100644 index 1fe014cd2..000000000 --- a/searx/static/less/bootstrap/bootstrap_yeti.less +++ /dev/null @@ -1,55 +0,0 @@ -// Core variables and mixins -@import "variables.less"; -@import "theme_yeti/variables.less"; -@import "mixins.less"; - -// Reset and dependencies -@import "normalize.less"; -@import "print.less"; -@import "glyphicons.less"; - -// Core CSS -@import "scaffolding.less"; -@import "type.less"; -@import "code.less"; -@import "grid.less"; -@import "tables.less"; -@import "forms.less"; -@import "buttons.less"; - -// Components -@import "component-animations.less"; -@import "dropdowns.less"; -@import "button-groups.less"; -@import "input-groups.less"; -@import "navs.less"; -@import "navbar.less"; -@import "breadcrumbs.less"; -@import "pagination.less"; -@import "pager.less"; -@import "labels.less"; -@import "badges.less"; -@import "jumbotron.less"; -@import "thumbnails.less"; -@import "alerts.less"; -@import "progress-bars.less"; -@import "media.less"; -@import "list-group.less"; -@import "panels.less"; -@import "responsive-embed.less"; -@import "wells.less"; -@import "close.less"; - -// Components w/ JavaScript -@import "modals.less"; -@import "tooltip.less"; -@import "popovers.less"; -@import "carousel.less"; - -// Utility classes -@import "utilities.less"; -@import "responsive-utilities.less"; - -// own additions -@import "typeahead.less"; -@import "theme_yeti/bootswatch.less"; diff --git a/searx/static/less/bootstrap/theme_readable/bootswatch.less b/searx/static/less/bootstrap/theme_readable/bootswatch.less deleted file mode 100644 index 6404ff231..000000000 --- a/searx/static/less/bootstrap/theme_readable/bootswatch.less +++ /dev/null @@ -1,187 +0,0 @@ -// Readable 3.3.1 -// Bootswatch -// ----------------------------------------------------- - -@import url("//fonts.googleapis.com/css?family=Raleway:400,700"); - -// Navbar ===================================================================== - -.navbar { - font-family: @headings-font-family; - - &-nav, - &-form { - margin-left: 0; - margin-right: 0; - } - - &-nav > li > a { - padding: @padding-base-vertical @padding-base-horizontal; - margin: 12px 6px; - border: 1px solid transparent; - border-radius: @border-radius-base; - - &:hover { - border: 1px solid #ddd; - } - } - - &-nav > .active > a, - &-nav > .active > a:hover { - border: 1px solid #ddd; - } - - &-default .navbar-nav > .active > a:hover { - color: @navbar-default-link-hover-color; - } - - &-inverse .navbar-nav > .active > a:hover { - color: @navbar-inverse-link-hover-color; - } - - &-brand { - padding-top: 20px; - } -} - -@media (max-width: @grid-float-breakpoint) { - .navbar { - .navbar-nav > li > a { - margin: 0; - } - } -} - -// Buttons ==================================================================== - -.btn { - font-family: @headings-font-family; -} - -// Typography ================================================================= - -// Tables ===================================================================== - -// Forms ====================================================================== - -legend { - font-family: @headings-font-family; -} - -.input-group-addon { - font-family: @font-family-sans-serif; -} - -// Navs ======================================================================= - -.nav { - .open > a, - .open > a:hover, - .open > a:focus { - border: 1px solid #ddd; - } -} - -.pagination { - - font-family: @headings-font-family; - - &-lg > li > a, - &-lg > li > span { - padding: 14px 24px; - } -} - -.pager { - - font-family: @headings-font-family; - - a { - color: @text-color; - } - - a:hover { - border-color: transparent; - color: #fff; - } - - .disabled a { - border-color: @pager-border; - } -} - -// Indicators ================================================================= - -.close { - color: #fff; - text-decoration: none; - text-shadow: none; - opacity: 0.4; - - &:hover, - &:focus { - color: #fff; - opacity: 1; - } -} - -.alert { - .alert-link { - color: @alert-success-text; - text-decoration: underline; - } -} - -.label { - font-family: @headings-font-family; - font-weight: normal; - - &-default { - border: 1px solid #ddd; - color: @text-color; - } - -} - -.badge { - padding: 1px 7px 5px; - vertical-align: 2px; - font-family: @headings-font-family; - font-weight: normal; -} - -// Progress bars ============================================================== - -// Containers ================================================================= - -.panel { - .box-shadow(none); - - &-default { - .close { - color: @text-color; - } - } - - &-primary, - &-success, - &-warning, - &-danger, - &-info { - .panel-heading { - color: #fff; - } - - .panel-body { - border: 1px solid #ddd; - border-top-width: 0; - border-radius: 0 0 @border-radius-base @border-radius-base; - } - } -} - -.modal { - .close { - color: @text-color; - } -} diff --git a/searx/static/less/bootstrap/theme_readable/variables.less b/searx/static/less/bootstrap/theme_readable/variables.less deleted file mode 100644 index 071cdec93..000000000 --- a/searx/static/less/bootstrap/theme_readable/variables.less +++ /dev/null @@ -1,856 +0,0 @@ -// Readable 3.3.1 -// Variables -// -------------------------------------------------- - - -//== Colors -// -//## Gray and brand colors for use across Bootstrap. - -@gray-base: #000; -@gray-darker: lighten(@gray-base, 13.5%); // #222 -@gray-dark: lighten(@gray-base, 20%); // #333 -@gray: lighten(@gray-base, 33.5%); // #555 -@gray-light: lighten(@gray-base, 70%); // #999 -@gray-lighter: lighten(@gray-base, 93.5%); // #eee - -@brand-primary: #4582EC; -@brand-success: #3FAD46; -@brand-info: #5bc0de; -@brand-warning: #f0ad4e; -@brand-danger: #d9534f; - - -//== Scaffolding -// -//## Settings for some of the most global styles. - -//** Background color for ``. -@body-bg: #fff; -//** Global text color on ``. -@text-color: @gray-dark; - -//** Global textual link color. -@link-color: @brand-primary; -//** Link hover color set via `darken()` function. -@link-hover-color: darken(@link-color, 20%); -//** Link hover decoration. -@link-hover-decoration: underline; - - -//== Typography -// -//## Font, line-height, and color for body text, headings, and more. - -@font-family-sans-serif: "Raleway", "Helvetica Neue", Helvetica, Arial, sans-serif; -@font-family-serif: Georgia, "Times New Roman", Times, serif; -//** Default monospace fonts for ``, ``, and `
`.
-@font-family-monospace:   Menlo, Monaco, Consolas, "Courier New", monospace;
-@font-family-base:        @font-family-serif;
-
-@font-size-base:          16px;
-@font-size-large:         ceil((@font-size-base * 1.25)); // ~18px
-@font-size-small:         ceil((@font-size-base * 0.85)); // ~12px
-
-@font-size-h1:            floor((@font-size-base * 2.6)); // ~36px
-@font-size-h2:            floor((@font-size-base * 2.15)); // ~30px
-@font-size-h3:            ceil((@font-size-base * 1.7)); // ~24px
-@font-size-h4:            ceil((@font-size-base * 1.25)); // ~18px
-@font-size-h5:            @font-size-base;
-@font-size-h6:            ceil((@font-size-base * 0.85)); // ~12px
-
-//** Unit-less `line-height` for use in components like buttons.
-@line-height-base:        1.428571429; // 20/14
-//** Computed "line-height" (`font-size` * `line-height`) for use with `margin`, `padding`, etc.
-@line-height-computed:    floor((@font-size-base * @line-height-base)); // ~20px
-
-//** By default, this inherits from the ``.
-@headings-font-family:    @font-family-sans-serif;
-@headings-font-weight:    bold;
-@headings-line-height:    1.1;
-@headings-color:          inherit;
-
-
-//== Iconography
-//
-//## Specify custom location and filename of the included Glyphicons icon font. Useful for those including Bootstrap via Bower.
-
-//** Load fonts from this directory.
-@icon-font-path:          "../fonts/";
-//** File name for all font files.
-@icon-font-name:          "glyphicons-halflings-regular";
-//** Element ID within SVG icon file.
-@icon-font-svg-id:        "glyphicons_halflingsregular";
-
-
-//== Components
-//
-//## Define common padding and border radius sizes and more. Values based on 14px text and 1.428 line-height (~20px to start).
-
-@padding-base-vertical:     8px;
-@padding-base-horizontal:   12px;
-
-@padding-large-vertical:    14px;
-@padding-large-horizontal:  16px;
-
-@padding-small-vertical:    5px;
-@padding-small-horizontal:  10px;
-
-@padding-xs-vertical:       1px;
-@padding-xs-horizontal:     5px;
-
-@line-height-large:         1.33;
-@line-height-small:         1.5;
-
-@border-radius-base:        4px;
-@border-radius-large:       6px;
-@border-radius-small:       3px;
-
-//** Global color for active items (e.g., navs or dropdowns).
-@component-active-color:    #fff;
-//** Global background color for active items (e.g., navs or dropdowns).
-@component-active-bg:       @brand-primary;
-
-//** Width of the `border` for generating carets that indicator dropdowns.
-@caret-width-base:          4px;
-//** Carets increase slightly in size for larger components.
-@caret-width-large:         5px;
-
-
-//== Tables
-//
-//## Customizes the `.table` component with basic values, each used across all table variations.
-
-//** Padding for ``s and ``s.
-@table-cell-padding:            8px;
-//** Padding for cells in `.table-condensed`.
-@table-condensed-cell-padding:  5px;
-
-//** Default background color used for all tables.
-@table-bg:                      transparent;
-//** Background color used for `.table-striped`.
-@table-bg-accent:               #f9f9f9;
-//** Background color used for `.table-hover`.
-@table-bg-hover:                #f5f5f5;
-@table-bg-active:               @table-bg-hover;
-
-//** Border color for table and cell borders.
-@table-border-color:            #ddd;
-
-
-//== Buttons
-//
-//## For each of Bootstrap's buttons, define text, background and border color.
-
-@btn-font-weight:                normal;
-
-@btn-default-color:              @text-color;
-@btn-default-bg:                 #fff;
-@btn-default-border:             #ddd;
-
-@btn-primary-color:              #fff;
-@btn-primary-bg:                 @brand-primary;
-@btn-primary-border:             @btn-primary-bg;
-
-@btn-success-color:              #fff;
-@btn-success-bg:                 @brand-success;
-@btn-success-border:             @btn-success-bg;
-
-@btn-info-color:                 #fff;
-@btn-info-bg:                    @brand-info;
-@btn-info-border:                @btn-info-bg;
-
-@btn-warning-color:              #fff;
-@btn-warning-bg:                 @brand-warning;
-@btn-warning-border:             @btn-warning-bg;
-
-@btn-danger-color:               #fff;
-@btn-danger-bg:                  @brand-danger;
-@btn-danger-border:              @btn-danger-bg;
-
-@btn-link-disabled-color:        @gray-light;
-
-
-//== Forms
-//
-//##
-
-//** `` background color
-@input-bg:                       #fff;
-//** `` background color
-@input-bg-disabled:              @gray-lighter;
-
-//** Text color for ``s
-@input-color:                    @text-color;
-//** `` border color
-@input-border:                   #ddd;
-
-// TODO: Rename `@input-border-radius` to `@input-border-radius-base` in v4
-//** Default `.form-control` border radius
-@input-border-radius:            @border-radius-base;
-//** Large `.form-control` border radius
-@input-border-radius-large:      @border-radius-large;
-//** Small `.form-control` border radius
-@input-border-radius-small:      @border-radius-small;
-
-//** Border color for inputs on focus
-@input-border-focus:             #66afe9;
-
-//** Placeholder text color
-@input-color-placeholder:        @gray-light;
-
-//** Default `.form-control` height
-@input-height-base:              (@line-height-computed + (@padding-base-vertical * 2) + 2);
-//** Large `.form-control` height
-@input-height-large:             (ceil(@font-size-large * @line-height-large) + (@padding-large-vertical * 2) + 2);
-//** Small `.form-control` height
-@input-height-small:             (floor(@font-size-small * @line-height-small) + (@padding-small-vertical * 2) + 2);
-
-@legend-color:                   @text-color;
-@legend-border-color:            #e5e5e5;
-
-//** Background color for textual input addons
-@input-group-addon-bg:           @gray-lighter;
-//** Border color for textual input addons
-@input-group-addon-border-color: @input-border;
-
-//** Disabled cursor for form controls and buttons.
-@cursor-disabled:                not-allowed;
-
-
-//== Dropdowns
-//
-//## Dropdown menu container and contents.
-
-//** Background for the dropdown menu.
-@dropdown-bg:                    #fff;
-//** Dropdown menu `border-color`.
-@dropdown-border:                rgba(0,0,0,.15);
-//** Dropdown menu `border-color` **for IE8**.
-@dropdown-fallback-border:       #ccc;
-//** Divider color for between dropdown items.
-@dropdown-divider-bg:            #e5e5e5;
-
-//** Dropdown link text color.
-@dropdown-link-color:            @gray-dark;
-//** Hover color for dropdown links.
-@dropdown-link-hover-color:      #fff;
-//** Hover background for dropdown links.
-@dropdown-link-hover-bg:         @component-active-bg;
-
-//** Active dropdown menu item text color.
-@dropdown-link-active-color:     #fff;
-//** Active dropdown menu item background color.
-@dropdown-link-active-bg:        @component-active-bg;
-
-//** Disabled dropdown menu item background color.
-@dropdown-link-disabled-color:   @gray-light;
-
-//** Text color for headers within dropdown menus.
-@dropdown-header-color:          @gray-light;
-
-//** Deprecated `@dropdown-caret-color` as of v3.1.0
-@dropdown-caret-color:           #000;
-
-
-//-- Z-index master list
-//
-// Warning: Avoid customizing these values. They're used for a bird's eye view
-// of components dependent on the z-axis and are designed to all work together.
-//
-// Note: These variables are not generated into the Customizer.
-
-@zindex-navbar:            1000;
-@zindex-dropdown:          1000;
-@zindex-popover:           1060;
-@zindex-tooltip:           1070;
-@zindex-navbar-fixed:      1030;
-@zindex-modal:             1040;
-
-
-//== Media queries breakpoints
-//
-//## Define the breakpoints at which your layout will change, adapting to different screen sizes.
-
-// Extra small screen / phone
-//** Deprecated `@screen-xs` as of v3.0.1
-@screen-xs:                  480px;
-//** Deprecated `@screen-xs-min` as of v3.2.0
-@screen-xs-min:              @screen-xs;
-//** Deprecated `@screen-phone` as of v3.0.1
-@screen-phone:               @screen-xs-min;
-
-// Small screen / tablet
-//** Deprecated `@screen-sm` as of v3.0.1
-@screen-sm:                  768px;
-@screen-sm-min:              @screen-sm;
-//** Deprecated `@screen-tablet` as of v3.0.1
-@screen-tablet:              @screen-sm-min;
-
-// Medium screen / desktop
-//** Deprecated `@screen-md` as of v3.0.1
-@screen-md:                  992px;
-@screen-md-min:              @screen-md;
-//** Deprecated `@screen-desktop` as of v3.0.1
-@screen-desktop:             @screen-md-min;
-
-// Large screen / wide desktop
-//** Deprecated `@screen-lg` as of v3.0.1
-@screen-lg:                  1200px;
-@screen-lg-min:              @screen-lg;
-//** Deprecated `@screen-lg-desktop` as of v3.0.1
-@screen-lg-desktop:          @screen-lg-min;
-
-// So media queries don't overlap when required, provide a maximum
-@screen-xs-max:              (@screen-sm-min - 1);
-@screen-sm-max:              (@screen-md-min - 1);
-@screen-md-max:              (@screen-lg-min - 1);
-
-
-//== Grid system
-//
-//## Define your custom responsive grid.
-
-//** Number of columns in the grid.
-@grid-columns:              12;
-//** Padding between columns. Gets divided in half for the left and right.
-@grid-gutter-width:         30px;
-// Navbar collapse
-//** Point at which the navbar becomes uncollapsed.
-@grid-float-breakpoint:     @screen-sm-min;
-//** Point at which the navbar begins collapsing.
-@grid-float-breakpoint-max: (@grid-float-breakpoint - 1);
-
-
-//== Container sizes
-//
-//## Define the maximum width of `.container` for different screen sizes.
-
-// Small screen / tablet
-@container-tablet:             (720px + @grid-gutter-width);
-//** For `@screen-sm-min` and up.
-@container-sm:                 @container-tablet;
-
-// Medium screen / desktop
-@container-desktop:            (940px + @grid-gutter-width);
-//** For `@screen-md-min` and up.
-@container-md:                 @container-desktop;
-
-// Large screen / wide desktop
-@container-large-desktop:      (1140px + @grid-gutter-width);
-//** For `@screen-lg-min` and up.
-@container-lg:                 @container-large-desktop;
-
-
-//== Navbar
-//
-//##
-
-// Basics of a navbar
-@navbar-height:                    65px;
-@navbar-margin-bottom:             @line-height-computed;
-@navbar-border-radius:             @border-radius-base;
-@navbar-padding-horizontal:        floor((@grid-gutter-width / 2));
-@navbar-padding-vertical:          ((@navbar-height - @line-height-computed) / 2);
-@navbar-collapse-max-height:       340px;
-
-@navbar-default-color:             @text-color;
-@navbar-default-bg:                @body-bg;
-@navbar-default-border:            #ddd;
-
-// Navbar links
-@navbar-default-link-color:                @link-color;
-@navbar-default-link-hover-color:          @link-color;
-@navbar-default-link-hover-bg:             transparent;
-@navbar-default-link-active-color:         @navbar-default-link-color;
-@navbar-default-link-active-bg:            transparent;
-@navbar-default-link-disabled-color:       #333;
-@navbar-default-link-disabled-bg:          transparent;
-
-// Navbar brand label
-@navbar-default-brand-color:               @navbar-default-link-color;
-@navbar-default-brand-hover-color:         @navbar-default-link-hover-color;
-@navbar-default-brand-hover-bg:            transparent;
-
-// Navbar toggle
-@navbar-default-toggle-hover-bg:           #ddd;
-@navbar-default-toggle-icon-bar-bg:        #ccc;
-@navbar-default-toggle-border-color:       #ddd;
-
-
-// Inverted navbar
-// Reset inverted navbar basics
-@navbar-inverse-color:                      @text-color;
-@navbar-inverse-bg:                         @body-bg;
-@navbar-inverse-border:                     #ddd;
-
-// Inverted navbar links
-@navbar-inverse-link-color:                 @text-color;
-@navbar-inverse-link-hover-color:           @text-color;
-@navbar-inverse-link-hover-bg:              transparent;
-@navbar-inverse-link-active-color:          @text-color;
-@navbar-inverse-link-active-bg:             transparent;
-@navbar-inverse-link-disabled-color:        #ccc;
-@navbar-inverse-link-disabled-bg:           transparent;
-
-// Inverted navbar brand label
-@navbar-inverse-brand-color:                @navbar-inverse-link-color;
-@navbar-inverse-brand-hover-color:          @navbar-inverse-link-hover-color;
-@navbar-inverse-brand-hover-bg:             transparent;
-
-// Inverted navbar toggle
-@navbar-inverse-toggle-hover-bg:            #ddd;
-@navbar-inverse-toggle-icon-bar-bg:         #ccc;
-@navbar-inverse-toggle-border-color:        #ddd;
-
-
-//== Navs
-//
-//##
-
-//=== Shared nav styles
-@nav-link-padding:                          10px 15px;
-@nav-link-hover-bg:                         @gray-lighter;
-
-@nav-disabled-link-color:                   @gray-light;
-@nav-disabled-link-hover-color:             @gray-light;
-
-//== Tabs
-@nav-tabs-border-color:                     #ddd;
-
-@nav-tabs-link-hover-border-color:          @gray-lighter;
-
-@nav-tabs-active-link-hover-bg:             @body-bg;
-@nav-tabs-active-link-hover-color:          @gray;
-@nav-tabs-active-link-hover-border-color:   #ddd;
-
-@nav-tabs-justified-link-border-color:            #ddd;
-@nav-tabs-justified-active-link-border-color:     @body-bg;
-
-//== Pills
-@nav-pills-border-radius:                   @border-radius-base;
-@nav-pills-active-link-hover-bg:            @component-active-bg;
-@nav-pills-active-link-hover-color:         @component-active-color;
-
-
-//== Pagination
-//
-//##
-
-@pagination-color:                     @text-color;
-@pagination-bg:                        #fff;
-@pagination-border:                    #ddd;
-
-@pagination-hover-color:               #fff;
-@pagination-hover-bg:                  @brand-primary;
-@pagination-hover-border:              @brand-primary;
-
-@pagination-active-color:              #fff;
-@pagination-active-bg:                 @brand-primary;
-@pagination-active-border:             @brand-primary;
-
-@pagination-disabled-color:            @gray-light;
-@pagination-disabled-bg:               #fff;
-@pagination-disabled-border:           #ddd;
-
-
-//== Pager
-//
-//##
-
-@pager-bg:                             @pagination-bg;
-@pager-border:                         @pagination-border;
-@pager-border-radius:                  15px;
-
-@pager-hover-bg:                       @pagination-hover-bg;
-
-@pager-active-bg:                      @pagination-active-bg;
-@pager-active-color:                   @pagination-active-color;
-
-@pager-disabled-color:                 @gray-light;
-
-
-//== Jumbotron
-//
-//##
-
-@jumbotron-padding:              30px;
-@jumbotron-color:                inherit;
-@jumbotron-bg:                   darken(@body-bg, 3%);
-@jumbotron-heading-color:        inherit;
-@jumbotron-font-size:            ceil((@font-size-base * 1.5));
-
-
-//== Form states and alerts
-//
-//## Define colors for form feedback states and, by default, alerts.
-
-@state-success-text:             @brand-success;
-@state-success-bg:               #dff0d8;
-@state-success-border:           @brand-success;
-
-@state-info-text:                @brand-info;
-@state-info-bg:                  #d9edf7;
-@state-info-border:              @brand-info;
-
-@state-warning-text:             @brand-warning;
-@state-warning-bg:               #fcf8e3;
-@state-warning-border:           @brand-warning;
-
-@state-danger-text:              @brand-danger;
-@state-danger-bg:                #f2dede;
-@state-danger-border:            @brand-danger;
-
-
-//== Tooltips
-//
-//##
-
-//** Tooltip max width
-@tooltip-max-width:           200px;
-//** Tooltip text color
-@tooltip-color:               #fff;
-//** Tooltip background color
-@tooltip-bg:                  rgba(0,0,0,.9);
-@tooltip-opacity:             .9;
-
-//** Tooltip arrow width
-@tooltip-arrow-width:         5px;
-//** Tooltip arrow color
-@tooltip-arrow-color:         @tooltip-bg;
-
-
-//== Popovers
-//
-//##
-
-//** Popover body background color
-@popover-bg:                          #fff;
-//** Popover maximum width
-@popover-max-width:                   276px;
-//** Popover border color
-@popover-border-color:                rgba(0,0,0,.2);
-//** Popover fallback border color
-@popover-fallback-border-color:       #ccc;
-
-//** Popover title background color
-@popover-title-bg:                    darken(@popover-bg, 3%);
-
-//** Popover arrow width
-@popover-arrow-width:                 10px;
-//** Popover arrow color
-@popover-arrow-color:                 @popover-bg;
-
-//** Popover outer arrow width
-@popover-arrow-outer-width:           (@popover-arrow-width + 1);
-//** Popover outer arrow color
-@popover-arrow-outer-color:           fadein(@popover-border-color, 5%);
-//** Popover outer arrow fallback color
-@popover-arrow-outer-fallback-color:  darken(@popover-fallback-border-color, 20%);
-
-
-//== Labels
-//
-//##
-
-//** Default label background color
-@label-default-bg:            @btn-default-bg;
-//** Primary label background color
-@label-primary-bg:            @brand-primary;
-//** Success label background color
-@label-success-bg:            @brand-success;
-//** Info label background color
-@label-info-bg:               @brand-info;
-//** Warning label background color
-@label-warning-bg:            @brand-warning;
-//** Danger label background color
-@label-danger-bg:             @brand-danger;
-
-//** Default label text color
-@label-color:                 #fff;
-//** Default text color of a linked label
-@label-link-hover-color:      #fff;
-
-
-//== Modals
-//
-//##
-
-//** Padding applied to the modal body
-@modal-inner-padding:         20px;
-
-//** Padding applied to the modal title
-@modal-title-padding:         15px;
-//** Modal title line-height
-@modal-title-line-height:     @line-height-base;
-
-//** Background color of modal content area
-@modal-content-bg:                             #fff;
-//** Modal content border color
-@modal-content-border-color:                   rgba(0,0,0,.2);
-//** Modal content border color **for IE8**
-@modal-content-fallback-border-color:          #999;
-
-//** Modal backdrop background color
-@modal-backdrop-bg:           #000;
-//** Modal backdrop opacity
-@modal-backdrop-opacity:      .5;
-//** Modal header border color
-@modal-header-border-color:   #e5e5e5;
-//** Modal footer border color
-@modal-footer-border-color:   @modal-header-border-color;
-
-@modal-lg:                    900px;
-@modal-md:                    600px;
-@modal-sm:                    300px;
-
-
-//== Alerts
-//
-//## Define alert colors, border radius, and padding.
-
-@alert-padding:               15px;
-@alert-border-radius:         @border-radius-base;
-@alert-link-font-weight:      bold;
-
-@alert-success-bg:            @state-success-border;
-@alert-success-text:          #fff;
-@alert-success-border:        @state-success-border;
-
-@alert-info-bg:               @state-info-border;
-@alert-info-text:             #fff;
-@alert-info-border:           @state-info-border;
-
-@alert-warning-bg:            @state-warning-border;
-@alert-warning-text:          #fff;
-@alert-warning-border:        @state-warning-border;
-
-@alert-danger-bg:             @state-danger-border;
-@alert-danger-text:           #fff;
-@alert-danger-border:         @state-danger-border;
-
-
-//== Progress bars
-//
-//##
-
-//** Background color of the whole progress component
-@progress-bg:                 #f5f5f5;
-//** Progress bar text color
-@progress-bar-color:          #fff;
-//** Variable for setting rounded corners on progress bar.
-@progress-border-radius:      @border-radius-base;
-
-//** Default progress bar color
-@progress-bar-bg:             @brand-primary;
-//** Success progress bar color
-@progress-bar-success-bg:     @brand-success;
-//** Warning progress bar color
-@progress-bar-warning-bg:     @brand-warning;
-//** Danger progress bar color
-@progress-bar-danger-bg:      @brand-danger;
-//** Info progress bar color
-@progress-bar-info-bg:        @brand-info;
-
-
-//== List group
-//
-//##
-
-//** Background color on `.list-group-item`
-@list-group-bg:                 #fff;
-//** `.list-group-item` border color
-@list-group-border:             #ddd;
-//** List group border radius
-@list-group-border-radius:      @border-radius-base;
-
-//** Background color of single list items on hover
-@list-group-hover-bg:           #f5f5f5;
-//** Text color of active list items
-@list-group-active-color:       @component-active-color;
-//** Background color of active list items
-@list-group-active-bg:          @component-active-bg;
-//** Border color of active list elements
-@list-group-active-border:      @list-group-active-bg;
-//** Text color for content within active list items
-@list-group-active-text-color:  lighten(@list-group-active-bg, 40%);
-
-//** Text color of disabled list items
-@list-group-disabled-color:      @gray-light;
-//** Background color of disabled list items
-@list-group-disabled-bg:         @gray-lighter;
-//** Text color for content within disabled list items
-@list-group-disabled-text-color: @list-group-disabled-color;
-
-@list-group-link-color:         #555;
-@list-group-link-hover-color:   @list-group-link-color;
-@list-group-link-heading-color: #333;
-
-
-//== Panels
-//
-//##
-
-@panel-bg:                    #fff;
-@panel-body-padding:          15px;
-@panel-heading-padding:       10px 15px;
-@panel-footer-padding:        @panel-heading-padding;
-@panel-border-radius:         @border-radius-base;
-
-//** Border color for elements within panels
-@panel-inner-border:          #ddd;
-@panel-footer-bg:             #fff;
-
-@panel-default-text:          @gray-dark;
-@panel-default-border:        #ddd;
-@panel-default-heading-bg:    #f5f5f5;
-
-@panel-primary-text:          #fff;
-@panel-primary-border:        transparent;
-@panel-primary-heading-bg:    @brand-primary;
-
-@panel-success-text:          @state-success-text;
-@panel-success-border:        transparent;
-@panel-success-heading-bg:    @state-success-border;
-
-@panel-info-text:             @state-info-text;
-@panel-info-border:           transparent;
-@panel-info-heading-bg:       @state-info-border;
-
-@panel-warning-text:          @state-warning-text;
-@panel-warning-border:        transparent;
-@panel-warning-heading-bg:    @state-warning-border;
-
-@panel-danger-text:           @state-danger-text;
-@panel-danger-border:         transparent;
-@panel-danger-heading-bg:     @state-danger-border;
-
-
-//== Thumbnails
-//
-//##
-
-//** Padding around the thumbnail image
-@thumbnail-padding:           4px;
-//** Thumbnail background color
-@thumbnail-bg:                @body-bg;
-//** Thumbnail border color
-@thumbnail-border:            #ddd;
-//** Thumbnail border radius
-@thumbnail-border-radius:     @border-radius-base;
-
-//** Custom text color for thumbnail captions
-@thumbnail-caption-color:     @text-color;
-//** Padding around the thumbnail caption
-@thumbnail-caption-padding:   9px;
-
-
-//== Wells
-//
-//##
-
-@well-bg:                     darken(@body-bg, 3%);
-@well-border:                 darken(@well-bg, 7%);
-
-
-//== Badges
-//
-//##
-
-@badge-color:                 #fff;
-//** Linked badge text color on hover
-@badge-link-hover-color:      #fff;
-@badge-bg:                    @brand-primary;
-
-//** Badge text color in active nav link
-@badge-active-color:          @link-color;
-//** Badge background color in active nav link
-@badge-active-bg:             #fff;
-
-@badge-font-weight:           bold;
-@badge-line-height:           1;
-@badge-border-radius:         10px;
-
-
-//== Breadcrumbs
-//
-//##
-
-@breadcrumb-padding-vertical:   8px;
-@breadcrumb-padding-horizontal: 15px;
-//** Breadcrumb background color
-@breadcrumb-bg:                 #f5f5f5;
-//** Breadcrumb text color
-@breadcrumb-color:              #ccc;
-//** Text color of current page in the breadcrumb
-@breadcrumb-active-color:       @gray-light;
-//** Textual separator for between breadcrumb elements
-@breadcrumb-separator:          "/";
-
-
-//== Carousel
-//
-//##
-
-@carousel-text-shadow:                        0 1px 2px rgba(0,0,0,.6);
-
-@carousel-control-color:                      #fff;
-@carousel-control-width:                      15%;
-@carousel-control-opacity:                    .5;
-@carousel-control-font-size:                  20px;
-
-@carousel-indicator-active-bg:                #fff;
-@carousel-indicator-border-color:             #fff;
-
-@carousel-caption-color:                      #fff;
-
-
-//== Close
-//
-//##
-
-@close-font-weight:           bold;
-@close-color:                 #fff;
-@close-text-shadow:           0 1px 0 #fff;
-
-
-//== Code
-//
-//##
-
-@code-color:                  #c7254e;
-@code-bg:                     #f9f2f4;
-
-@kbd-color:                   #fff;
-@kbd-bg:                      #333;
-
-@pre-bg:                      #f5f5f5;
-@pre-color:                   @gray-dark;
-@pre-border-color:            #ccc;
-@pre-scrollable-max-height:   340px;
-
-
-//== Type
-//
-//##
-
-//** Horizontal offset for forms and lists.
-@component-offset-horizontal: 180px;
-//** Text muted color
-@text-muted:                  @gray-light;
-//** Abbreviations and acronyms border color
-@abbr-border-color:           @gray-light;
-//** Headings small color
-@headings-small-color:        @gray-light;
-//** Blockquote small color
-@blockquote-small-color:      @text-color;
-//** Blockquote font size
-@blockquote-font-size:        (@font-size-base * 1.25);
-//** Blockquote border color
-@blockquote-border-color:     @brand-primary;
-//** Page header border color
-@page-header-border-color:    #ddd;
-//** Width of horizontal description list titles
-@dl-horizontal-offset:        @component-offset-horizontal;
-//** Horizontal line color.
-@hr-border:                   @gray-lighter;
diff --git a/searx/static/less/bootstrap/theme_simplex/bootswatch.less b/searx/static/less/bootstrap/theme_simplex/bootswatch.less
deleted file mode 100644
index b0e4323d4..000000000
--- a/searx/static/less/bootstrap/theme_simplex/bootswatch.less
+++ /dev/null
@@ -1,142 +0,0 @@
-// Simplex 3.3.1
-// Bootswatch
-// -----------------------------------------------------
-
-@import url("//fonts.googleapis.com/css?family=Open+Sans:400,700");
-
-.btn-shadow(@color) {
-  #gradient > .vertical-three-colors(lighten(@color, 3%), @color, 6%, darken(@color, 3%));
-  filter: none;
-  border: 1px solid darken(@color, 10%);
-}
-
-// Navbar =====================================================================
-
-.navbar {
-
-  &-inverse {
-
-    .badge {
-      background-color: #fff;
-      color: @brand-primary;
-    }
-  }
-}
-
-// Buttons ====================================================================
-
-.btn {
-  font-family: @headings-font-family;
-}
-
-.btn-default,
-.btn-default:hover {
-  .btn-shadow(@btn-default-bg);
-}
-
-.btn-primary,
-.btn-primary:hover {
-  .btn-shadow(@btn-primary-bg);
-}
-
-.btn-success,
-.btn-success:hover {
-  .btn-shadow(@btn-success-bg);
-}
-
-.btn-info,
-.btn-info:hover {
-  .btn-shadow(@btn-info-bg);
-}
-
-.btn-warning,
-.btn-warning:hover {
-  .btn-shadow(@btn-warning-bg);
-}
-
-.btn-danger,
-.btn-danger:hover {
-  .btn-shadow(@btn-danger-bg);
-}
-
-// Typography =================================================================
-
-body {
-  font-weight: 200;
-}
-
-// Tables =====================================================================
-
-th {
-  color: @headings-color;
-}
-
-// Forms ======================================================================
-
-legend {
-  color: @headings-color;
-}
-
-label {
-  font-weight: normal;
-}
-
-.has-warning {
-  .help-block,
-  .control-label {
-    color: @brand-danger;
-  }
-
-  .form-control,
-  .form-control:focus {
-    border-color: @brand-danger;
-  }
-}
-
-.has-error {
-  .help-block,
-  .control-label {
-    color: @brand-primary;
-  }
-
-  .form-control,
-  .form-control:focus {
-    border-color: @brand-primary;
-  }
-}
-
-.has-success {
-  .help-block,
-  .control-label {
-    color: @brand-success;
-  }
-
-  .form-control,
-  .form-control:focus {
-    border-color: @brand-success;
-  }
-}
-
-// Navs =======================================================================
-
-.pager {
-  a {
-    color: @headings-color;
-  }
-
-  a:hover,
-  .active > a, {
-    border-color: @brand-primary;
-    color: #fff;
-  }
-
-  .disabled > a {
-    border-color: @pager-border;
-  }
-}
-
-// Indicators =================================================================
-
-// Progress bars ==============================================================
-
-// Containers =================================================================
\ No newline at end of file
diff --git a/searx/static/less/bootstrap/theme_simplex/variables.less b/searx/static/less/bootstrap/theme_simplex/variables.less
deleted file mode 100644
index d3477b349..000000000
--- a/searx/static/less/bootstrap/theme_simplex/variables.less
+++ /dev/null
@@ -1,856 +0,0 @@
-// Simplex 3.3.1
-// Variables
-// --------------------------------------------------
-
-
-//== Colors
-//
-//## Gray and brand colors for use across Bootstrap.
-
-@gray-base:              #000;
-@gray-darker:            lighten(@gray-base, 13.5%); // #222
-@gray-dark:              #444;
-@gray:                   #777;
-@gray-light:             #808080;
-@gray-lighter:           #ddd;
-
-@brand-primary:         #D9230F;
-@brand-success:         #469408;
-@brand-info:            #029ACF;
-@brand-warning:         #9B479F;
-@brand-danger:          #D9831F;
-
-
-//== Scaffolding
-//
-//## Settings for some of the most global styles.
-
-//** Background color for ``.
-@body-bg:               #FCFCFC;
-//** Global text color on ``.
-@text-color:            @gray;
-
-//** Global textual link color.
-@link-color:            @brand-primary;
-//** Link hover color set via `darken()` function.
-@link-hover-color:      darken(@link-color, 15%);
-//** Link hover decoration.
-@link-hover-decoration: underline;
-
-
-//== Typography
-//
-//## Font, line-height, and color for body text, headings, and more.
-
-@font-family-sans-serif:  "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
-@font-family-serif:       Georgia, "Times New Roman", Times, serif;
-//** Default monospace fonts for ``, ``, and `
`.
-@font-family-monospace:   Menlo, Monaco, Consolas, "Courier New", monospace;
-@font-family-base:        @font-family-sans-serif;
-
-@font-size-base:          13px;
-@font-size-large:         ceil((@font-size-base * 1.25)); // ~18px
-@font-size-small:         ceil((@font-size-base * 0.85)); // ~12px
-
-@font-size-h1:            floor((@font-size-base * 2.6)); // ~36px
-@font-size-h2:            floor((@font-size-base * 2.15)); // ~30px
-@font-size-h3:            ceil((@font-size-base * 1.7)); // ~24px
-@font-size-h4:            ceil((@font-size-base * 1.25)); // ~18px
-@font-size-h5:            @font-size-base;
-@font-size-h6:            ceil((@font-size-base * 0.85)); // ~12px
-
-//** Unit-less `line-height` for use in components like buttons.
-@line-height-base:        1.428571429; // 20/14
-//** Computed "line-height" (`font-size` * `line-height`) for use with `margin`, `padding`, etc.
-@line-height-computed:    floor((@font-size-base * @line-height-base)); // ~20px
-
-//** By default, this inherits from the ``.
-@headings-font-family:    @font-family-sans-serif;
-@headings-font-weight:    300;
-@headings-line-height:    1.1;
-@headings-color:          @gray-dark;
-
-
-//== Iconography
-//
-//## Specify custom location and filename of the included Glyphicons icon font. Useful for those including Bootstrap via Bower.
-
-//** Load fonts from this directory.
-@icon-font-path:          "../fonts/";
-//** File name for all font files.
-@icon-font-name:          "glyphicons-halflings-regular";
-//** Element ID within SVG icon file.
-@icon-font-svg-id:        "glyphicons_halflingsregular";
-
-
-//== Components
-//
-//## Define common padding and border radius sizes and more. Values based on 14px text and 1.428 line-height (~20px to start).
-
-@padding-base-vertical:     8px;
-@padding-base-horizontal:   12px;
-
-@padding-large-vertical:    14px;
-@padding-large-horizontal:  16px;
-
-@padding-small-vertical:    5px;
-@padding-small-horizontal:  10px;
-
-@padding-xs-vertical:       1px;
-@padding-xs-horizontal:     5px;
-
-@line-height-large:         1.33;
-@line-height-small:         1.5;
-
-@border-radius-base:        4px;
-@border-radius-large:       6px;
-@border-radius-small:       3px;
-
-//** Global color for active items (e.g., navs or dropdowns).
-@component-active-color:    #fff;
-//** Global background color for active items (e.g., navs or dropdowns).
-@component-active-bg:       @brand-primary;
-
-//** Width of the `border` for generating carets that indicator dropdowns.
-@caret-width-base:          4px;
-//** Carets increase slightly in size for larger components.
-@caret-width-large:         5px;
-
-
-//== Tables
-//
-//## Customizes the `.table` component with basic values, each used across all table variations.
-
-//** Padding for ``s and ``s.
-@table-cell-padding:            8px;
-//** Padding for cells in `.table-condensed`.
-@table-condensed-cell-padding:  5px;
-
-//** Default background color used for all tables.
-@table-bg:                      transparent;
-//** Background color used for `.table-striped`.
-@table-bg-accent:               #f9f9f9;
-//** Background color used for `.table-hover`.
-@table-bg-hover:                #f5f5f5;
-@table-bg-active:               @table-bg-hover;
-
-//** Border color for table and cell borders.
-@table-border-color:            #ddd;
-
-
-//== Buttons
-//
-//## For each of Bootstrap's buttons, define text, background and border color.
-
-@btn-font-weight:                normal;
-
-@btn-default-color:              #fff;
-@btn-default-bg:                 #474949;
-@btn-default-border:             @btn-default-bg;
-
-@btn-primary-color:              @btn-default-color;
-@btn-primary-bg:                 @brand-primary;
-@btn-primary-border:             @btn-primary-bg;
-
-@btn-success-color:              @btn-default-color;
-@btn-success-bg:                 @brand-success;
-@btn-success-border:             @btn-success-bg;
-
-@btn-info-color:                 @btn-default-color;
-@btn-info-bg:                    @brand-info;
-@btn-info-border:                @btn-info-bg;
-
-@btn-warning-color:              @btn-default-color;
-@btn-warning-bg:                 @brand-warning;
-@btn-warning-border:             @btn-warning-bg;
-
-@btn-danger-color:               @btn-default-color;
-@btn-danger-bg:                  @brand-danger;
-@btn-danger-border:              @btn-danger-bg;
-
-@btn-link-disabled-color:        @gray-light;
-
-
-//== Forms
-//
-//##
-
-//** `` background color
-@input-bg:                       #fff;
-//** `` background color
-@input-bg-disabled:              @gray-lighter;
-
-//** Text color for ``s
-@input-color:                    @text-color;
-//** `` border color
-@input-border:                   #ddd;
-
-// TODO: Rename `@input-border-radius` to `@input-border-radius-base` in v4
-//** Default `.form-control` border radius
-@input-border-radius:            @border-radius-base;
-//** Large `.form-control` border radius
-@input-border-radius-large:      @border-radius-large;
-//** Small `.form-control` border radius
-@input-border-radius-small:      @border-radius-small;
-
-//** Border color for inputs on focus
-@input-border-focus:             #66afe9;
-
-//** Placeholder text color
-@input-color-placeholder:        @gray-lighter;
-
-//** Default `.form-control` height
-@input-height-base:              (@line-height-computed + (@padding-base-vertical * 2) + 2);
-//** Large `.form-control` height
-@input-height-large:             (ceil(@font-size-large * @line-height-large) + (@padding-large-vertical * 2) + 2);
-//** Small `.form-control` height
-@input-height-small:             (floor(@font-size-small * @line-height-small) + (@padding-small-vertical * 2) + 2);
-
-@legend-color:                   @text-color;
-@legend-border-color:            #e5e5e5;
-
-//** Background color for textual input addons
-@input-group-addon-bg:           @gray-lighter;
-//** Border color for textual input addons
-@input-group-addon-border-color: @input-border;
-
-//** Disabled cursor for form controls and buttons.
-@cursor-disabled:                not-allowed;
-
-
-//== Dropdowns
-//
-//## Dropdown menu container and contents.
-
-//** Background for the dropdown menu.
-@dropdown-bg:                    #fff;
-//** Dropdown menu `border-color`.
-@dropdown-border:                rgba(0,0,0,.15);
-//** Dropdown menu `border-color` **for IE8**.
-@dropdown-fallback-border:       #ccc;
-//** Divider color for between dropdown items.
-@dropdown-divider-bg:            #e5e5e5;
-
-//** Dropdown link text color.
-@dropdown-link-color:            @gray-dark;
-//** Hover color for dropdown links.
-@dropdown-link-hover-color:      #fff;
-//** Hover background for dropdown links.
-@dropdown-link-hover-bg:         @component-active-bg;
-
-//** Active dropdown menu item text color.
-@dropdown-link-active-color:     #fff;
-//** Active dropdown menu item background color.
-@dropdown-link-active-bg:        @component-active-bg;
-
-//** Disabled dropdown menu item background color.
-@dropdown-link-disabled-color:   @gray-light;
-
-//** Text color for headers within dropdown menus.
-@dropdown-header-color:          @gray-light;
-
-//** Deprecated `@dropdown-caret-color` as of v3.1.0
-@dropdown-caret-color:           #000;
-
-
-//-- Z-index master list
-//
-// Warning: Avoid customizing these values. They're used for a bird's eye view
-// of components dependent on the z-axis and are designed to all work together.
-//
-// Note: These variables are not generated into the Customizer.
-
-@zindex-navbar:            1000;
-@zindex-dropdown:          1000;
-@zindex-popover:           1060;
-@zindex-tooltip:           1070;
-@zindex-navbar-fixed:      1030;
-@zindex-modal:             1040;
-
-
-//== Media queries breakpoints
-//
-//## Define the breakpoints at which your layout will change, adapting to different screen sizes.
-
-// Extra small screen / phone
-//** Deprecated `@screen-xs` as of v3.0.1
-@screen-xs:                  480px;
-//** Deprecated `@screen-xs-min` as of v3.2.0
-@screen-xs-min:              @screen-xs;
-//** Deprecated `@screen-phone` as of v3.0.1
-@screen-phone:               @screen-xs-min;
-
-// Small screen / tablet
-//** Deprecated `@screen-sm` as of v3.0.1
-@screen-sm:                  768px;
-@screen-sm-min:              @screen-sm;
-//** Deprecated `@screen-tablet` as of v3.0.1
-@screen-tablet:              @screen-sm-min;
-
-// Medium screen / desktop
-//** Deprecated `@screen-md` as of v3.0.1
-@screen-md:                  992px;
-@screen-md-min:              @screen-md;
-//** Deprecated `@screen-desktop` as of v3.0.1
-@screen-desktop:             @screen-md-min;
-
-// Large screen / wide desktop
-//** Deprecated `@screen-lg` as of v3.0.1
-@screen-lg:                  1200px;
-@screen-lg-min:              @screen-lg;
-//** Deprecated `@screen-lg-desktop` as of v3.0.1
-@screen-lg-desktop:          @screen-lg-min;
-
-// So media queries don't overlap when required, provide a maximum
-@screen-xs-max:              (@screen-sm-min - 1);
-@screen-sm-max:              (@screen-md-min - 1);
-@screen-md-max:              (@screen-lg-min - 1);
-
-
-//== Grid system
-//
-//## Define your custom responsive grid.
-
-//** Number of columns in the grid.
-@grid-columns:              12;
-//** Padding between columns. Gets divided in half for the left and right.
-@grid-gutter-width:         30px;
-// Navbar collapse
-//** Point at which the navbar becomes uncollapsed.
-@grid-float-breakpoint:     @screen-sm-min;
-//** Point at which the navbar begins collapsing.
-@grid-float-breakpoint-max: (@grid-float-breakpoint - 1);
-
-
-//== Container sizes
-//
-//## Define the maximum width of `.container` for different screen sizes.
-
-// Small screen / tablet
-@container-tablet:             (720px + @grid-gutter-width);
-//** For `@screen-sm-min` and up.
-@container-sm:                 @container-tablet;
-
-// Medium screen / desktop
-@container-desktop:            (940px + @grid-gutter-width);
-//** For `@screen-md-min` and up.
-@container-md:                 @container-desktop;
-
-// Large screen / wide desktop
-@container-large-desktop:      (1140px + @grid-gutter-width);
-//** For `@screen-lg-min` and up.
-@container-lg:                 @container-large-desktop;
-
-
-//== Navbar
-//
-//##
-
-// Basics of a navbar
-@navbar-height:                    40px;
-@navbar-margin-bottom:             @line-height-computed;
-@navbar-border-radius:             @border-radius-base;
-@navbar-padding-horizontal:        floor((@grid-gutter-width / 2));
-@navbar-padding-vertical:          ((@navbar-height - @line-height-computed) / 2);
-@navbar-collapse-max-height:       340px;
-
-@navbar-default-color:             @gray;
-@navbar-default-bg:                #fff;
-@navbar-default-border:            darken(@navbar-default-bg, 6.5%);
-
-// Navbar links
-@navbar-default-link-color:                @gray;
-@navbar-default-link-hover-color:          @brand-primary;
-@navbar-default-link-hover-bg:             transparent;
-@navbar-default-link-active-color:         @navbar-default-link-hover-color;
-@navbar-default-link-active-bg:            transparent;
-@navbar-default-link-disabled-color:       #444;
-@navbar-default-link-disabled-bg:          transparent;
-
-// Navbar brand label
-@navbar-default-brand-color:               @navbar-default-link-color;
-@navbar-default-brand-hover-color:         @navbar-default-link-hover-color;
-@navbar-default-brand-hover-bg:            transparent;
-
-// Navbar toggle
-@navbar-default-toggle-hover-bg:           #ddd;
-@navbar-default-toggle-icon-bar-bg:        #ccc;
-@navbar-default-toggle-border-color:       #ddd;
-
-
-// Inverted navbar
-// Reset inverted navbar basics
-@navbar-inverse-color:                      lighten(@brand-primary, 40%);
-@navbar-inverse-bg:                         @brand-primary;
-@navbar-inverse-border:                     darken(@navbar-inverse-bg, 10%);
-
-// Inverted navbar links
-@navbar-inverse-link-color:                 lighten(@brand-primary, 40%);
-@navbar-inverse-link-hover-color:           #fff;
-@navbar-inverse-link-hover-bg:              transparent;
-@navbar-inverse-link-active-color:          @navbar-inverse-link-hover-color;
-@navbar-inverse-link-active-bg:             transparent;
-@navbar-inverse-link-disabled-color:        #ccc;
-@navbar-inverse-link-disabled-bg:           transparent;
-
-// Inverted navbar brand label
-@navbar-inverse-brand-color:                @navbar-inverse-link-color;
-@navbar-inverse-brand-hover-color:          #fff;
-@navbar-inverse-brand-hover-bg:             transparent;
-
-// Inverted navbar toggle
-@navbar-inverse-toggle-hover-bg:            darken(@navbar-inverse-bg, 10%);
-@navbar-inverse-toggle-icon-bar-bg:         #fff;
-@navbar-inverse-toggle-border-color:        darken(@navbar-inverse-bg, 10%);
-
-
-//== Navs
-//
-//##
-
-//=== Shared nav styles
-@nav-link-padding:                          10px 15px;
-@nav-link-hover-bg:                         @gray-lighter;
-
-@nav-disabled-link-color:                   @gray-light;
-@nav-disabled-link-hover-color:             @gray-light;
-
-//== Tabs
-@nav-tabs-border-color:                     #ddd;
-
-@nav-tabs-link-hover-border-color:          @gray-lighter;
-
-@nav-tabs-active-link-hover-bg:             @body-bg;
-@nav-tabs-active-link-hover-color:          @gray;
-@nav-tabs-active-link-hover-border-color:   #ddd;
-
-@nav-tabs-justified-link-border-color:            #ddd;
-@nav-tabs-justified-active-link-border-color:     @body-bg;
-
-//== Pills
-@nav-pills-border-radius:                   @border-radius-base;
-@nav-pills-active-link-hover-bg:            @component-active-bg;
-@nav-pills-active-link-hover-color:         @component-active-color;
-
-
-//== Pagination
-//
-//##
-
-@pagination-color:                     @headings-color;
-@pagination-bg:                        #fff;
-@pagination-border:                    #ddd;
-
-@pagination-hover-color:               #fff;
-@pagination-hover-bg:                  @brand-primary;
-@pagination-hover-border:              @brand-primary;
-
-@pagination-active-color:              #fff;
-@pagination-active-bg:                 @brand-primary;
-@pagination-active-border:             @brand-primary;
-
-@pagination-disabled-color:            @gray-lighter;
-@pagination-disabled-bg:               #fff;
-@pagination-disabled-border:           #ddd;
-
-
-//== Pager
-//
-//##
-
-@pager-bg:                             @pagination-bg;
-@pager-border:                         @pagination-border;
-@pager-border-radius:                  15px;
-
-@pager-hover-bg:                       @brand-primary;
-
-@pager-active-bg:                      @brand-primary;
-@pager-active-color:                   #fff;
-
-@pager-disabled-color:                 @gray-lighter;
-
-
-//== Jumbotron
-//
-//##
-
-@jumbotron-padding:              30px;
-@jumbotron-color:                inherit;
-@jumbotron-bg:                   darken(@body-bg, 3%);
-@jumbotron-heading-color:        inherit;
-@jumbotron-font-size:            ceil((@font-size-base * 1.5));
-
-
-//== Form states and alerts
-//
-//## Define colors for form feedback states and, by default, alerts.
-
-@state-success-text:             #468847;
-@state-success-bg:               #dff0d8;
-@state-success-border:           darken(spin(@state-success-bg, -10), 5%);
-
-@state-info-text:                #3a87ad;
-@state-info-bg:                  #d9edf7;
-@state-info-border:              darken(spin(@state-info-bg, -10), 7%);
-
-@state-warning-text:             #c09853;
-@state-warning-bg:               #fcf8e3;
-@state-warning-border:           darken(spin(@state-warning-bg, -10), 3%);
-
-@state-danger-text:              #b94a48;
-@state-danger-bg:                #f2dede;
-@state-danger-border:            darken(spin(@state-danger-bg, -10), 3%);
-
-
-//== Tooltips
-//
-//##
-
-//** Tooltip max width
-@tooltip-max-width:           200px;
-//** Tooltip text color
-@tooltip-color:               #fff;
-//** Tooltip background color
-@tooltip-bg:                  rgba(0,0,0,.9);
-@tooltip-opacity:             .9;
-
-//** Tooltip arrow width
-@tooltip-arrow-width:         5px;
-//** Tooltip arrow color
-@tooltip-arrow-color:         @tooltip-bg;
-
-
-//== Popovers
-//
-//##
-
-//** Popover body background color
-@popover-bg:                          #fff;
-//** Popover maximum width
-@popover-max-width:                   276px;
-//** Popover border color
-@popover-border-color:                rgba(0,0,0,.2);
-//** Popover fallback border color
-@popover-fallback-border-color:       #ccc;
-
-//** Popover title background color
-@popover-title-bg:                    darken(@popover-bg, 3%);
-
-//** Popover arrow width
-@popover-arrow-width:                 10px;
-//** Popover arrow color
-@popover-arrow-color:                 @popover-bg;
-
-//** Popover outer arrow width
-@popover-arrow-outer-width:           (@popover-arrow-width + 1);
-//** Popover outer arrow color
-@popover-arrow-outer-color:           fadein(@popover-border-color, 5%);
-//** Popover outer arrow fallback color
-@popover-arrow-outer-fallback-color:  darken(@popover-fallback-border-color, 20%);
-
-
-//== Labels
-//
-//##
-
-//** Default label background color
-@label-default-bg:            @btn-default-bg;
-//** Primary label background color
-@label-primary-bg:            @brand-primary;
-//** Success label background color
-@label-success-bg:            @brand-success;
-//** Info label background color
-@label-info-bg:               @brand-info;
-//** Warning label background color
-@label-warning-bg:            @brand-warning;
-//** Danger label background color
-@label-danger-bg:             @brand-danger;
-
-//** Default label text color
-@label-color:                 #fff;
-//** Default text color of a linked label
-@label-link-hover-color:      #fff;
-
-
-//== Modals
-//
-//##
-
-//** Padding applied to the modal body
-@modal-inner-padding:         20px;
-
-//** Padding applied to the modal title
-@modal-title-padding:         15px;
-//** Modal title line-height
-@modal-title-line-height:     @line-height-base;
-
-//** Background color of modal content area
-@modal-content-bg:                             #fff;
-//** Modal content border color
-@modal-content-border-color:                   rgba(0,0,0,.2);
-//** Modal content border color **for IE8**
-@modal-content-fallback-border-color:          #999;
-
-//** Modal backdrop background color
-@modal-backdrop-bg:           #000;
-//** Modal backdrop opacity
-@modal-backdrop-opacity:      .5;
-//** Modal header border color
-@modal-header-border-color:   #e5e5e5;
-//** Modal footer border color
-@modal-footer-border-color:   @modal-header-border-color;
-
-@modal-lg:                    900px;
-@modal-md:                    600px;
-@modal-sm:                    300px;
-
-
-//== Alerts
-//
-//## Define alert colors, border radius, and padding.
-
-@alert-padding:               15px;
-@alert-border-radius:         @border-radius-base;
-@alert-link-font-weight:      bold;
-
-@alert-success-bg:            @state-success-bg;
-@alert-success-text:          @state-success-text;
-@alert-success-border:        @state-success-border;
-
-@alert-info-bg:               @state-info-bg;
-@alert-info-text:             @state-info-text;
-@alert-info-border:           @state-info-border;
-
-@alert-warning-bg:            @state-warning-bg;
-@alert-warning-text:          @state-warning-text;
-@alert-warning-border:        @state-warning-border;
-
-@alert-danger-bg:             @state-danger-bg;
-@alert-danger-text:           @state-danger-text;
-@alert-danger-border:         @state-danger-border;
-
-
-//== Progress bars
-//
-//##
-
-//** Background color of the whole progress component
-@progress-bg:                 #f5f5f5;
-//** Progress bar text color
-@progress-bar-color:          #fff;
-//** Variable for setting rounded corners on progress bar.
-@progress-border-radius:      @border-radius-base;
-
-//** Default progress bar color
-@progress-bar-bg:             @brand-primary;
-//** Success progress bar color
-@progress-bar-success-bg:     @brand-success;
-//** Warning progress bar color
-@progress-bar-warning-bg:     @brand-warning;
-//** Danger progress bar color
-@progress-bar-danger-bg:      @brand-danger;
-//** Info progress bar color
-@progress-bar-info-bg:        @brand-info;
-
-
-//== List group
-//
-//##
-
-//** Background color on `.list-group-item`
-@list-group-bg:                 #fff;
-//** `.list-group-item` border color
-@list-group-border:             #ddd;
-//** List group border radius
-@list-group-border-radius:      @border-radius-base;
-
-//** Background color of single list items on hover
-@list-group-hover-bg:           #f5f5f5;
-//** Text color of active list items
-@list-group-active-color:       @component-active-color;
-//** Background color of active list items
-@list-group-active-bg:          @component-active-bg;
-//** Border color of active list elements
-@list-group-active-border:      @list-group-active-bg;
-//** Text color for content within active list items
-@list-group-active-text-color:  lighten(@list-group-active-bg, 40%);
-
-//** Text color of disabled list items
-@list-group-disabled-color:      @gray-light;
-//** Background color of disabled list items
-@list-group-disabled-bg:         @gray-lighter;
-//** Text color for content within disabled list items
-@list-group-disabled-text-color: @list-group-disabled-color;
-
-@list-group-link-color:         #555;
-@list-group-link-hover-color:   @list-group-link-color;
-@list-group-link-heading-color: #333;
-
-
-//== Panels
-//
-//##
-
-@panel-bg:                    #fff;
-@panel-body-padding:          15px;
-@panel-heading-padding:       10px 15px;
-@panel-footer-padding:        @panel-heading-padding;
-@panel-border-radius:         @border-radius-base;
-
-//** Border color for elements within panels
-@panel-inner-border:          #ddd;
-@panel-footer-bg:             @body-bg;
-
-@panel-default-text:          @gray-dark;
-@panel-default-border:        #ddd;
-@panel-default-heading-bg:    @panel-footer-bg;
-
-@panel-primary-text:          #fff;
-@panel-primary-border:        @brand-primary;
-@panel-primary-heading-bg:    @brand-primary;
-
-@panel-success-text:          #fff;
-@panel-success-border:        @brand-success;
-@panel-success-heading-bg:    @brand-success;
-
-@panel-info-text:             #fff;
-@panel-info-border:           @brand-info;
-@panel-info-heading-bg:       @brand-info;
-
-@panel-warning-text:          #fff;
-@panel-warning-border:        @brand-warning;
-@panel-warning-heading-bg:    @brand-warning;
-
-@panel-danger-text:           #fff;
-@panel-danger-border:         @brand-danger;
-@panel-danger-heading-bg:     @brand-danger;
-
-
-//== Thumbnails
-//
-//##
-
-//** Padding around the thumbnail image
-@thumbnail-padding:           4px;
-//** Thumbnail background color
-@thumbnail-bg:                @body-bg;
-//** Thumbnail border color
-@thumbnail-border:            #ddd;
-//** Thumbnail border radius
-@thumbnail-border-radius:     @border-radius-base;
-
-//** Custom text color for thumbnail captions
-@thumbnail-caption-color:     @text-color;
-//** Padding around the thumbnail caption
-@thumbnail-caption-padding:   9px;
-
-
-//== Wells
-//
-//##
-
-@well-bg:                     darken(@body-bg, 3%);
-@well-border:                 darken(@well-bg, 7%);
-
-
-//== Badges
-//
-//##
-
-@badge-color:                 #fff;
-//** Linked badge text color on hover
-@badge-link-hover-color:      #fff;
-@badge-bg:                    @link-color;
-
-//** Badge text color in active nav link
-@badge-active-color:          @link-color;
-//** Badge background color in active nav link
-@badge-active-bg:             #fff;
-
-@badge-font-weight:           bold;
-@badge-line-height:           1;
-@badge-border-radius:         10px;
-
-
-//== Breadcrumbs
-//
-//##
-
-@breadcrumb-padding-vertical:   8px;
-@breadcrumb-padding-horizontal: 15px;
-//** Breadcrumb background color
-@breadcrumb-bg:                 transparent;
-//** Breadcrumb text color
-@breadcrumb-color:              #ccc;
-//** Text color of current page in the breadcrumb
-@breadcrumb-active-color:       @gray-light;
-//** Textual separator for between breadcrumb elements
-@breadcrumb-separator:          "/";
-
-
-//== Carousel
-//
-//##
-
-@carousel-text-shadow:                        0 1px 2px rgba(0,0,0,.6);
-
-@carousel-control-color:                      #fff;
-@carousel-control-width:                      15%;
-@carousel-control-opacity:                    .5;
-@carousel-control-font-size:                  20px;
-
-@carousel-indicator-active-bg:                #fff;
-@carousel-indicator-border-color:             #fff;
-
-@carousel-caption-color:                      #fff;
-
-
-//== Close
-//
-//##
-
-@close-font-weight:           bold;
-@close-color:                 #000;
-@close-text-shadow:           0 1px 0 #fff;
-
-
-//== Code
-//
-//##
-
-@code-color:                  #c7254e;
-@code-bg:                     #f9f2f4;
-
-@kbd-color:                   #fff;
-@kbd-bg:                      #333;
-
-@pre-bg:                      #f5f5f5;
-@pre-color:                   @gray-dark;
-@pre-border-color:            #ccc;
-@pre-scrollable-max-height:   340px;
-
-
-//== Type
-//
-//##
-
-//** Horizontal offset for forms and lists.
-@component-offset-horizontal: 180px;
-//** Text muted color
-@text-muted:                  @gray-light;
-//** Abbreviations and acronyms border color
-@abbr-border-color:           @gray-light;
-//** Headings small color
-@headings-small-color:        @gray-light;
-//** Blockquote small color
-@blockquote-small-color:      @gray-light;
-//** Blockquote font size
-@blockquote-font-size:        (@font-size-base * 1.25);
-//** Blockquote border color
-@blockquote-border-color:     @gray-lighter;
-//** Page header border color
-@page-header-border-color:    @gray-lighter;
-//** Width of horizontal description list titles
-@dl-horizontal-offset:        @component-offset-horizontal;
-//** Horizontal line color.
-@hr-border:                   @gray-lighter;
diff --git a/searx/static/less/bootstrap/theme_yeti/bootswatch.less b/searx/static/less/bootstrap/theme_yeti/bootswatch.less
deleted file mode 100644
index 44ab1c71a..000000000
--- a/searx/static/less/bootstrap/theme_yeti/bootswatch.less
+++ /dev/null
@@ -1,437 +0,0 @@
-// Yeti 3.3.1
-// Bootswatch
-// -----------------------------------------------------
-
-@import url("//fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,700italic,400,300,700");
-
-// Navbar =====================================================================
-
-.navbar {
-  border: none;
-  font-size: 13px;
-  font-weight: 300;
-
-  .navbar-toggle:hover .icon-bar {
-    background-color: #b3b3b3;
-  }
-
-  &-collapse {
-    border-top-color: @dropdown-divider-bg;
-    .box-shadow(none);
-  }
-
-  .btn {
-    padding-top: 6px;
-    padding-bottom: 6px;
-  }
-
-  &-form {
-    margin-top: 7px;
-    margin-bottom: 5px;
-
-    .form-control {
-      height: auto;
-      padding: @padding-xs-vertical @padding-xs-horizontal;
-    }
-  }
-
-  .dropdown {
-
-    &-menu {
-      border: none;
-
-      > li > a,
-      > li > a:focus {
-        background-color: transparent;
-        font-size: 13px;
-        font-weight: 300;
-      }
-    }
-
-    &-header {
-      color: rgba(255, 255, 255, 0.5);
-    }
-
-  }
-
-  &-default {
-
-    .dropdown-menu {
-      background-color: @navbar-default-bg;
-
-      > li > a,
-      > li > a:focus {
-        color: @navbar-default-color;
-      }
-
-      > li > a:hover,
-      > .active > a,
-      > .active > a:hover {
-        background-color: @navbar-default-link-hover-bg;
-      }
-    }
-  }
-
-  &-inverse {
-
-    .dropdown-menu {
-      background-color: @navbar-inverse-bg;
-
-      > li > a,
-      > li > a:focus {
-        color: @navbar-inverse-color;
-      }
-
-      > li > a:hover,
-      > .active > a,
-      > .active > a:hover {
-        background-color: @navbar-inverse-link-hover-bg;
-      }
-    }
-  }
-}
-
-// Buttons ====================================================================
-
-.btn {
-  padding: @padding-base-vertical @padding-base-horizontal;
-
-  &-lg {
-    padding: @padding-large-vertical @padding-large-horizontal;
-  }
-
-  &-sm {
-    padding: @padding-small-vertical @padding-small-horizontal;
-  }
-
-  &-xs {
-    padding: @padding-xs-vertical @padding-xs-horizontal;
-  }
-}
-
-.btn-group {
-
-  .btn ~ .dropdown-toggle {
-    padding-left: 16px;
-    padding-right: 16px;
-  }
-
-  .dropdown-menu {
-    border-top-width: 0;
-  }
-
-  &.dropup .dropdown-menu {
-    border-top-width: 1px;
-    border-bottom-width: 0;
-    margin-bottom: 0;
-  }
-
-  .dropdown-toggle {
-
-    &.btn-default ~ .dropdown-menu {
-      background-color: @btn-default-bg;
-      border-color: @btn-default-border;
-
-      > li > a {
-        color: @btn-default-color;
-      }
-
-      > li > a:hover {
-        background-color: darken(@btn-default-bg, 8%);
-      }
-    }
-
-    &.btn-primary ~ .dropdown-menu {
-      background-color: @btn-primary-bg;
-      border-color: @btn-primary-border;
-
-      > li > a {
-        color: @btn-primary-color;
-      }
-
-      > li > a:hover {
-        background-color: darken(@btn-primary-bg, 8%);
-      }
-    }
-
-    &.btn-success ~ .dropdown-menu {
-      background-color: @btn-success-bg;
-      border-color: @btn-success-border;
-
-      > li > a {
-        color: @btn-success-color;
-      }
-
-      > li > a:hover {
-        background-color: darken(@btn-success-bg, 8%);
-      }
-    }
-
-    &.btn-info ~ .dropdown-menu {
-      background-color: @btn-info-bg;
-      border-color: @btn-info-border;
-
-      > li > a {
-        color: @btn-info-color;
-      }
-
-      > li > a:hover {
-        background-color: darken(@btn-info-bg, 8%);
-      }
-    }
-
-    &.btn-warning ~ .dropdown-menu {
-      background-color: @btn-warning-bg;
-      border-color: @btn-warning-border;
-
-      > li > a {
-        color: @btn-warning-color;
-      }
-
-      > li > a:hover {
-        background-color: darken(@btn-warning-bg, 8%);
-      }
-    }
-
-    &.btn-danger ~ .dropdown-menu {
-      background-color: @btn-danger-bg;
-      border-color: @btn-danger-border;
-
-      > li > a {
-        color: @btn-danger-color;
-      }
-
-      > li > a:hover {
-        background-color: darken(@btn-danger-bg, 8%);
-      }
-    }
-  }
-}
-
-// Typography =================================================================
-
-.lead {
-  color: @gray;
-}
-
-cite {
-  font-style: italic;
-}
-
-blockquote {
-  border-left-width: 1px;
-  color: @gray;
-
-  &.pull-right {
-    border-right-width: 1px;
-  }
-
-  small {
-    font-size: @font-size-small;
-    font-weight: 300;
-  }
-}
-
-// Tables =====================================================================
-
-table {
-  font-size: @font-size-small;
-}
-
-// Forms ======================================================================
-
-label,
-.control-label,
-.help-block,
-.checkbox,
-.radio {
-  font-size: @font-size-small;
-  font-weight: normal;
-}
-
-input[type="radio"],
-input[type="checkbox"] {
-  margin-top: 1px;
-}
-
-// Navs =======================================================================
-
-.nav {
-  .open > a,
-  .open > a:hover,
-  .open > a:focus {
-    border-color: transparent;
-  }
-}
-
-.nav-tabs {
-  > li > a {
-    background-color: @btn-default-bg;
-    color: @text-color;
-  }
-
-  .caret {
-    border-top-color: @text-color;
-    border-bottom-color: @text-color;
-  }
-}
-
-.nav-pills {
-  font-weight: 300;
-}
-
-.breadcrumb {
-  border: 1px solid @table-border-color;
-  border-radius: 3px;
-  font-size: 10px;
-  font-weight: 300;
-  text-transform: uppercase;
-}
-
-.pagination {
-  font-size: @font-size-small;
-  font-weight: 300;
-  color: @gray-light;
-
-  > li {
-    > a,
-    > span {
-      margin-left: 4px;
-      color: @gray-light;
-    }
-  }
-
-  > .active {
-    > a,
-    > span {
-      color: #fff;
-    }
-  }
-
-  > li,
-  > li:first-child,
-  > li:last-child {
-    > a,
-    > span {
-      border-radius: 3px;
-    }
-  }
-
-  &-lg > li > a {
-    padding-left: 22px;
-    padding-right: 22px;
-  }
-
-  &-sm > li > a {
-    padding: 0 5px;
-  }
-}
-
-.pager {
-  font-size: @font-size-small;
-  font-weight: 300;
-  color: @gray-light;
-}
-
-.list-group {
-  font-size: @font-size-small;
-  font-weight: 300;
-}
-
-// Indicators =================================================================
-
-.close {
-  opacity: 0.4;
-  text-decoration: none;
-  text-shadow: none;
-
-  &:hover,
-  &:focus {
-    opacity: 1;
-  }
-}
-
-.alert {
-  font-size: @font-size-small;
-  font-weight: 300;
-
-  .alert-link {
-    font-weight: normal;
-    color: #fff;
-    text-decoration: underline;
-  }
-}
-
-.label {
-  padding-left: 1em;
-  padding-right: 1em;
-  border-radius: 0;
-  font-weight: 300;
-
-  &-default {
-    background-color: @btn-default-bg;
-    color: @btn-default-color;
-  }
-}
-
-.badge {
-  font-weight: 300;
-}
-
-// Progress bars ==============================================================
-
-.progress {
-  height: 22px;
-  padding: 2px;
-  background-color: #f6f6f6;
-  border: 1px solid #ccc;
-  .box-shadow(none);
-}
-
-// Containers =================================================================
-
-.dropdown {
-
-  &-menu {
-    padding: 0;
-    margin-top: 0;
-    font-size: @font-size-small;
-
-    > li > a {
-      padding: 12px 15px;
-    }
-  }
-
-  &-header {
-    padding-left: 15px;
-    padding-right: 15px;
-    font-size: 9px;
-    text-transform: uppercase;
-  }
-}
-
-.popover {
-  color: #fff;
-  font-size: 12px;
-  font-weight: 300;
-}
-
-.panel {
-  &-heading,
-  &-footer {
-    border-top-right-radius: 0;
-    border-top-left-radius: 0;
-  }
-
-  &-default {
-    .close {
-      color: @text-color;
-    }
-  }
-}
-
-.modal {
-  .close {
-    color: @text-color;
-  }
-}
diff --git a/searx/static/less/bootstrap/theme_yeti/variables.less b/searx/static/less/bootstrap/theme_yeti/variables.less
deleted file mode 100644
index af51f2f42..000000000
--- a/searx/static/less/bootstrap/theme_yeti/variables.less
+++ /dev/null
@@ -1,856 +0,0 @@
-// Yeti 3.3.1
-// Variables
-// --------------------------------------------------
-
-
-//== Colors
-//
-//## Gray and brand colors for use across Bootstrap.
-
-@gray-base:              #000;
-@gray-darker:            lighten(@gray-base, 13.5%); // #222
-@gray-dark:              lighten(@gray-base, 20%);   // #333
-@gray:                   #6f6f6f; // #555
-@gray-light:             lighten(@gray-base, 60%);   // #999
-@gray-lighter:           lighten(@gray-base, 93.5%); // #eee
-
-@brand-primary:         #008cba;
-@brand-success:         #43ac6a;
-@brand-info:            #5bc0de;
-@brand-warning:         #E99002;
-@brand-danger:          #F04124;
-
-
-//== Scaffolding
-//
-//## Settings for some of the most global styles.
-
-//** Background color for ``.
-@body-bg:               #fff;
-//** Global text color on ``.
-@text-color:            @gray-darker;
-
-//** Global textual link color.
-@link-color:            @brand-primary;
-//** Link hover color set via `darken()` function.
-@link-hover-color:      darken(@link-color, 15%);
-//** Link hover decoration.
-@link-hover-decoration: underline;
-
-
-//== Typography
-//
-//## Font, line-height, and color for body text, headings, and more.
-
-@font-family-sans-serif:  "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
-@font-family-serif:       Georgia, "Times New Roman", Times, serif;
-//** Default monospace fonts for ``, ``, and `
`.
-@font-family-monospace:   Menlo, Monaco, Consolas, "Courier New", monospace;
-@font-family-base:        @font-family-sans-serif;
-
-@font-size-base:          15px;
-@font-size-large:         ceil((@font-size-base * 1.25)); // ~18px
-@font-size-small:         12px; // ~12px
-
-@font-size-h1:            floor((@font-size-base * 2.6)); // ~36px
-@font-size-h2:            floor((@font-size-base * 2.15)); // ~30px
-@font-size-h3:            ceil((@font-size-base * 1.7)); // ~24px
-@font-size-h4:            ceil((@font-size-base * 1.25)); // ~18px
-@font-size-h5:            @font-size-base;
-@font-size-h6:            ceil((@font-size-base * 0.85)); // ~12px
-
-//** Unit-less `line-height` for use in components like buttons.
-@line-height-base:        1.4;
-//** Computed "line-height" (`font-size` * `line-height`) for use with `margin`, `padding`, etc.
-@line-height-computed:    floor((@font-size-base * @line-height-base)); // ~20px
-
-//** By default, this inherits from the ``.
-@headings-font-family:    @font-family-base;
-@headings-font-weight:    300;
-@headings-line-height:    1.1;
-@headings-color:          inherit;
-
-
-//== Iconography
-//
-//## Specify custom location and filename of the included Glyphicons icon font. Useful for those including Bootstrap via Bower.
-
-//** Load fonts from this directory.
-@icon-font-path:          "../fonts/";
-//** File name for all font files.
-@icon-font-name:          "glyphicons-halflings-regular";
-//** Element ID within SVG icon file.
-@icon-font-svg-id:        "glyphicons_halflingsregular";
-
-
-//== Components
-//
-//## Define common padding and border radius sizes and more. Values based on 14px text and 1.428 line-height (~20px to start).
-
-@padding-base-vertical:     8px;
-@padding-base-horizontal:   12px;
-
-@padding-large-vertical:    16px;
-@padding-large-horizontal:  20px;
-
-@padding-small-vertical:    8px;
-@padding-small-horizontal:  12px;
-
-@padding-xs-vertical:       4px;
-@padding-xs-horizontal:     6px;
-
-@line-height-large:         1.33;
-@line-height-small:         1.5;
-
-@border-radius-base:        0;
-@border-radius-large:       0;
-@border-radius-small:       0;
-
-//** Global color for active items (e.g., navs or dropdowns).
-@component-active-color:    #fff;
-//** Global background color for active items (e.g., navs or dropdowns).
-@component-active-bg:       @brand-primary;
-
-//** Width of the `border` for generating carets that indicator dropdowns.
-@caret-width-base:          4px;
-//** Carets increase slightly in size for larger components.
-@caret-width-large:         5px;
-
-
-//== Tables
-//
-//## Customizes the `.table` component with basic values, each used across all table variations.
-
-//** Padding for ``s and ``s.
-@table-cell-padding:            8px;
-//** Padding for cells in `.table-condensed`.
-@table-condensed-cell-padding:  5px;
-
-//** Default background color used for all tables.
-@table-bg:                      transparent;
-//** Background color used for `.table-striped`.
-@table-bg-accent:               #f9f9f9;
-//** Background color used for `.table-hover`.
-@table-bg-hover:                #f5f5f5;
-@table-bg-active:               @table-bg-hover;
-
-//** Border color for table and cell borders.
-@table-border-color:            #ddd;
-
-
-//== Buttons
-//
-//## For each of Bootstrap's buttons, define text, background and border color.
-
-@btn-font-weight:                normal;
-
-@btn-default-color:              @gray-dark;
-@btn-default-bg:                 #e7e7e7;
-@btn-default-border:             #ccc;
-
-@btn-primary-color:              #fff;
-@btn-primary-bg:                 @brand-primary;
-@btn-primary-border:             darken(@btn-primary-bg, 5%);
-
-@btn-success-color:              #fff;
-@btn-success-bg:                 @brand-success;
-@btn-success-border:             darken(@btn-success-bg, 5%);
-
-@btn-info-color:                 #fff;
-@btn-info-bg:                    @brand-info;
-@btn-info-border:                darken(@btn-info-bg, 5%);
-
-@btn-warning-color:              #fff;
-@btn-warning-bg:                 @brand-warning;
-@btn-warning-border:             darken(@btn-warning-bg, 5%);
-
-@btn-danger-color:               #fff;
-@btn-danger-bg:                  @brand-danger;
-@btn-danger-border:              darken(@btn-danger-bg, 5%);
-
-@btn-link-disabled-color:        @gray-light;
-
-
-//== Forms
-//
-//##
-
-//** `` background color
-@input-bg:                       #fff;
-//** `` background color
-@input-bg-disabled:              @gray-lighter;
-
-//** Text color for ``s
-@input-color:                    @gray;
-//** `` border color
-@input-border:                   #ccc;
-
-// TODO: Rename `@input-border-radius` to `@input-border-radius-base` in v4
-//** Default `.form-control` border radius
-@input-border-radius:            @border-radius-base;
-//** Large `.form-control` border radius
-@input-border-radius-large:      @border-radius-large;
-//** Small `.form-control` border radius
-@input-border-radius-small:      @border-radius-small;
-
-//** Border color for inputs on focus
-@input-border-focus:             #66afe9;
-
-//** Placeholder text color
-@input-color-placeholder:        @gray-light;
-
-//** Default `.form-control` height
-@input-height-base:              (@line-height-computed + (@padding-base-vertical * 2) + 2);
-//** Large `.form-control` height
-@input-height-large:             (ceil(@font-size-large * @line-height-large) + (@padding-large-vertical * 2) + 2);
-//** Small `.form-control` height
-@input-height-small:             (floor(@font-size-small * @line-height-small) + (@padding-small-vertical * 2) + 2);
-
-@legend-color:                   @gray-dark;
-@legend-border-color:            #e5e5e5;
-
-//** Background color for textual input addons
-@input-group-addon-bg:           @gray-lighter;
-//** Border color for textual input addons
-@input-group-addon-border-color: @input-border;
-
-//** Disabled cursor for form controls and buttons.
-@cursor-disabled:                not-allowed;
-
-
-//== Dropdowns
-//
-//## Dropdown menu container and contents.
-
-//** Background for the dropdown menu.
-@dropdown-bg:                    #fff;
-//** Dropdown menu `border-color`.
-@dropdown-border:                rgba(0,0,0,.15);
-//** Dropdown menu `border-color` **for IE8**.
-@dropdown-fallback-border:       #ccc;
-//** Divider color for between dropdown items.
-@dropdown-divider-bg:            rgba(0,0,0,.2);
-
-//** Dropdown link text color.
-@dropdown-link-color:            #555;
-//** Hover color for dropdown links.
-@dropdown-link-hover-color:      darken(@gray-dark, 5%);
-//** Hover background for dropdown links.
-@dropdown-link-hover-bg:         #eee;
-
-//** Active dropdown menu item text color.
-@dropdown-link-active-color:     @component-active-color;
-//** Active dropdown menu item background color.
-@dropdown-link-active-bg:        @component-active-bg;
-
-//** Disabled dropdown menu item background color.
-@dropdown-link-disabled-color:   @gray-light;
-
-//** Text color for headers within dropdown menus.
-@dropdown-header-color:          @gray-light;
-
-//** Deprecated `@dropdown-caret-color` as of v3.1.0
-@dropdown-caret-color:           #000;
-
-
-//-- Z-index master list
-//
-// Warning: Avoid customizing these values. They're used for a bird's eye view
-// of components dependent on the z-axis and are designed to all work together.
-//
-// Note: These variables are not generated into the Customizer.
-
-@zindex-navbar:            1000;
-@zindex-dropdown:          1000;
-@zindex-popover:           1060;
-@zindex-tooltip:           1070;
-@zindex-navbar-fixed:      1030;
-@zindex-modal:             1040;
-
-
-//== Media queries breakpoints
-//
-//## Define the breakpoints at which your layout will change, adapting to different screen sizes.
-
-// Extra small screen / phone
-//** Deprecated `@screen-xs` as of v3.0.1
-@screen-xs:                  480px;
-//** Deprecated `@screen-xs-min` as of v3.2.0
-@screen-xs-min:              @screen-xs;
-//** Deprecated `@screen-phone` as of v3.0.1
-@screen-phone:               @screen-xs-min;
-
-// Small screen / tablet
-//** Deprecated `@screen-sm` as of v3.0.1
-@screen-sm:                  768px;
-@screen-sm-min:              @screen-sm;
-//** Deprecated `@screen-tablet` as of v3.0.1
-@screen-tablet:              @screen-sm-min;
-
-// Medium screen / desktop
-//** Deprecated `@screen-md` as of v3.0.1
-@screen-md:                  992px;
-@screen-md-min:              @screen-md;
-//** Deprecated `@screen-desktop` as of v3.0.1
-@screen-desktop:             @screen-md-min;
-
-// Large screen / wide desktop
-//** Deprecated `@screen-lg` as of v3.0.1
-@screen-lg:                  1200px;
-@screen-lg-min:              @screen-lg;
-//** Deprecated `@screen-lg-desktop` as of v3.0.1
-@screen-lg-desktop:          @screen-lg-min;
-
-// So media queries don't overlap when required, provide a maximum
-@screen-xs-max:              (@screen-sm-min - 1);
-@screen-sm-max:              (@screen-md-min - 1);
-@screen-md-max:              (@screen-lg-min - 1);
-
-
-//== Grid system
-//
-//## Define your custom responsive grid.
-
-//** Number of columns in the grid.
-@grid-columns:              12;
-//** Padding between columns. Gets divided in half for the left and right.
-@grid-gutter-width:         30px;
-// Navbar collapse
-//** Point at which the navbar becomes uncollapsed.
-@grid-float-breakpoint:     @screen-sm-min;
-//** Point at which the navbar begins collapsing.
-@grid-float-breakpoint-max: (@grid-float-breakpoint - 1);
-
-
-//== Container sizes
-//
-//## Define the maximum width of `.container` for different screen sizes.
-
-// Small screen / tablet
-@container-tablet:             (720px + @grid-gutter-width);
-//** For `@screen-sm-min` and up.
-@container-sm:                 @container-tablet;
-
-// Medium screen / desktop
-@container-desktop:            (940px + @grid-gutter-width);
-//** For `@screen-md-min` and up.
-@container-md:                 @container-desktop;
-
-// Large screen / wide desktop
-@container-large-desktop:      (1140px + @grid-gutter-width);
-//** For `@screen-lg-min` and up.
-@container-lg:                 @container-large-desktop;
-
-
-//== Navbar
-//
-//##
-
-// Basics of a navbar
-@navbar-height:                    45px;
-@navbar-margin-bottom:             @line-height-computed;
-@navbar-border-radius:             @border-radius-base;
-@navbar-padding-horizontal:        floor((@grid-gutter-width / 2));
-@navbar-padding-vertical:          ((@navbar-height - @line-height-computed) / 2);
-@navbar-collapse-max-height:       340px;
-
-@navbar-default-color:             #fff;
-@navbar-default-bg:                @gray-dark;
-@navbar-default-border:            darken(@navbar-default-bg, 6.5%);
-
-// Navbar links
-@navbar-default-link-color:                #fff;
-@navbar-default-link-hover-color:          #fff;
-@navbar-default-link-hover-bg:             #272727;
-@navbar-default-link-active-color:         #fff;
-@navbar-default-link-active-bg:            #272727;
-@navbar-default-link-disabled-color:       #ccc;
-@navbar-default-link-disabled-bg:          transparent;
-
-// Navbar brand label
-@navbar-default-brand-color:               @navbar-default-link-color;
-@navbar-default-brand-hover-color:         @navbar-default-brand-color;
-@navbar-default-brand-hover-bg:            transparent;
-
-// Navbar toggle
-@navbar-default-toggle-hover-bg:           transparent;
-@navbar-default-toggle-icon-bar-bg:        #fff;
-@navbar-default-toggle-border-color:       transparent;
-
-
-// Inverted navbar
-// Reset inverted navbar basics
-@navbar-inverse-color:                      #fff;
-@navbar-inverse-bg:                         @brand-primary;
-@navbar-inverse-border:                     darken(@navbar-inverse-bg, 10%);
-
-// Inverted navbar links
-@navbar-inverse-link-color:                 #fff;
-@navbar-inverse-link-hover-color:           #fff;
-@navbar-inverse-link-hover-bg:              darken(@navbar-inverse-bg, 10%);
-@navbar-inverse-link-active-color:          #fff;
-@navbar-inverse-link-active-bg:             darken(@navbar-inverse-bg, 10%);
-@navbar-inverse-link-disabled-color:        #444;
-@navbar-inverse-link-disabled-bg:           transparent;
-
-// Inverted navbar brand label
-@navbar-inverse-brand-color:                @navbar-inverse-link-color;
-@navbar-inverse-brand-hover-color:          #fff;
-@navbar-inverse-brand-hover-bg:             transparent;
-
-// Inverted navbar toggle
-@navbar-inverse-toggle-hover-bg:            transparent;
-@navbar-inverse-toggle-icon-bar-bg:         #fff;
-@navbar-inverse-toggle-border-color:        transparent;
-
-
-//== Navs
-//
-//##
-
-//=== Shared nav styles
-@nav-link-padding:                          10px 15px;
-@nav-link-hover-bg:                         @gray-lighter;
-
-@nav-disabled-link-color:                   @gray-light;
-@nav-disabled-link-hover-color:             @gray-light;
-
-//== Tabs
-@nav-tabs-border-color:                     @table-border-color;
-
-@nav-tabs-link-hover-border-color:          @gray-lighter;
-
-@nav-tabs-active-link-hover-bg:             @body-bg;
-@nav-tabs-active-link-hover-color:          @gray;
-@nav-tabs-active-link-hover-border-color:   @table-border-color;
-
-@nav-tabs-justified-link-border-color:            @table-border-color;
-@nav-tabs-justified-active-link-border-color:     @body-bg;
-
-//== Pills
-@nav-pills-border-radius:                   @border-radius-base;
-@nav-pills-active-link-hover-bg:            @component-active-bg;
-@nav-pills-active-link-hover-color:         @component-active-color;
-
-
-//== Pagination
-//
-//##
-
-@pagination-color:                     @link-color;
-@pagination-bg:                        transparent;
-@pagination-border:                    transparent;
-
-@pagination-hover-color:               @link-hover-color;
-@pagination-hover-bg:                  @gray-lighter;
-@pagination-hover-border:              transparent;
-
-@pagination-active-color:              #fff;
-@pagination-active-bg:                 @brand-primary;
-@pagination-active-border:             transparent;
-
-@pagination-disabled-color:            @gray-light;
-@pagination-disabled-bg:               #fff;
-@pagination-disabled-border:           transparent;
-
-
-//== Pager
-//
-//##
-
-@pager-bg:                             @pagination-bg;
-@pager-border:                         @pagination-border;
-@pager-border-radius:                  3px;
-
-@pager-hover-bg:                       @pagination-hover-bg;
-
-@pager-active-bg:                      @pagination-active-bg;
-@pager-active-color:                   @pagination-active-color;
-
-@pager-disabled-color:                 @gray-light;
-
-
-//== Jumbotron
-//
-//##
-
-@jumbotron-padding:              30px;
-@jumbotron-color:                inherit;
-@jumbotron-bg:                   #fafafa;
-@jumbotron-heading-color:        inherit;
-@jumbotron-font-size:            ceil((@font-size-base * 1.5));
-
-
-//== Form states and alerts
-//
-//## Define colors for form feedback states and, by default, alerts.
-
-@state-success-text:             @brand-success;
-@state-success-bg:               #dff0d8;
-@state-success-border:           darken(@state-success-text, 5%);
-
-@state-info-text:                @brand-info;
-@state-info-bg:                  #d9edf7;
-@state-info-border:              darken(@state-info-text, 7%);
-
-@state-warning-text:             @brand-warning;
-@state-warning-bg:               #fcf8e3;
-@state-warning-border:           darken(@state-warning-text, 5%);
-
-@state-danger-text:              @brand-danger;
-@state-danger-bg:                #f2dede;
-@state-danger-border:            darken(@state-danger-text, 5%);
-
-
-//== Tooltips
-//
-//##
-
-//** Tooltip max width
-@tooltip-max-width:           200px;
-//** Tooltip text color
-@tooltip-color:               #fff;
-//** Tooltip background color
-@tooltip-bg:                  @gray-dark;
-@tooltip-opacity:             .9;
-
-//** Tooltip arrow width
-@tooltip-arrow-width:         5px;
-//** Tooltip arrow color
-@tooltip-arrow-color:         @tooltip-bg;
-
-
-//== Popovers
-//
-//##
-
-//** Popover body background color
-@popover-bg:                          @gray-dark;
-//** Popover maximum width
-@popover-max-width:                   276px;
-//** Popover border color
-@popover-border-color:                transparent;
-//** Popover fallback border color
-@popover-fallback-border-color:       @gray-dark;
-
-//** Popover title background color
-@popover-title-bg:                    @popover-bg;
-
-//** Popover arrow width
-@popover-arrow-width:                 10px;
-//** Popover arrow color
-@popover-arrow-color:                 @popover-bg;
-
-//** Popover outer arrow width
-@popover-arrow-outer-width:           (@popover-arrow-width + 1);
-//** Popover outer arrow color
-@popover-arrow-outer-color:           fadein(@popover-border-color, 5%);
-//** Popover outer arrow fallback color
-@popover-arrow-outer-fallback-color:  darken(@popover-fallback-border-color, 20%);
-
-
-//== Labels
-//
-//##
-
-//** Default label background color
-@label-default-bg:            @gray-light;
-//** Primary label background color
-@label-primary-bg:            @brand-primary;
-//** Success label background color
-@label-success-bg:            @brand-success;
-//** Info label background color
-@label-info-bg:               @brand-info;
-//** Warning label background color
-@label-warning-bg:            @brand-warning;
-//** Danger label background color
-@label-danger-bg:             @brand-danger;
-
-//** Default label text color
-@label-color:                 #fff;
-//** Default text color of a linked label
-@label-link-hover-color:      #fff;
-
-
-//== Modals
-//
-//##
-
-//** Padding applied to the modal body
-@modal-inner-padding:         20px;
-
-//** Padding applied to the modal title
-@modal-title-padding:         15px;
-//** Modal title line-height
-@modal-title-line-height:     @line-height-base;
-
-//** Background color of modal content area
-@modal-content-bg:                             #fff;
-//** Modal content border color
-@modal-content-border-color:                   rgba(0,0,0,.2);
-//** Modal content border color **for IE8**
-@modal-content-fallback-border-color:          #999;
-
-//** Modal backdrop background color
-@modal-backdrop-bg:           #000;
-//** Modal backdrop opacity
-@modal-backdrop-opacity:      .5;
-//** Modal header border color
-@modal-header-border-color:   #e5e5e5;
-//** Modal footer border color
-@modal-footer-border-color:   @modal-header-border-color;
-
-@modal-lg:                    900px;
-@modal-md:                    600px;
-@modal-sm:                    300px;
-
-
-//== Alerts
-//
-//## Define alert colors, border radius, and padding.
-
-@alert-padding:               15px;
-@alert-border-radius:         @border-radius-base;
-@alert-link-font-weight:      bold;
-
-@alert-success-bg:            @brand-success;
-@alert-success-text:          #fff;
-@alert-success-border:        @state-success-border;
-
-@alert-info-bg:               @brand-info;
-@alert-info-text:             #fff;
-@alert-info-border:           @state-info-border;
-
-@alert-warning-bg:            @brand-warning;
-@alert-warning-text:          #fff;
-@alert-warning-border:        @state-warning-border;
-
-@alert-danger-bg:             @brand-danger;
-@alert-danger-text:           #fff;
-@alert-danger-border:         @state-danger-border;
-
-
-//== Progress bars
-//
-//##
-
-//** Background color of the whole progress component
-@progress-bg:                 #f5f5f5;
-//** Progress bar text color
-@progress-bar-color:          #fff;
-//** Variable for setting rounded corners on progress bar.
-@progress-border-radius:      @border-radius-base;
-
-//** Default progress bar color
-@progress-bar-bg:             @brand-primary;
-//** Success progress bar color
-@progress-bar-success-bg:     @brand-success;
-//** Warning progress bar color
-@progress-bar-warning-bg:     @brand-warning;
-//** Danger progress bar color
-@progress-bar-danger-bg:      @brand-danger;
-//** Info progress bar color
-@progress-bar-info-bg:        @brand-info;
-
-
-//== List group
-//
-//##
-
-//** Background color on `.list-group-item`
-@list-group-bg:                 #fff;
-//** `.list-group-item` border color
-@list-group-border:             @table-border-color;
-//** List group border radius
-@list-group-border-radius:      @border-radius-base;
-
-//** Background color of single list items on hover
-@list-group-hover-bg:           #f5f5f5;
-//** Text color of active list items
-@list-group-active-color:       @component-active-color;
-//** Background color of active list items
-@list-group-active-bg:          @component-active-bg;
-//** Border color of active list elements
-@list-group-active-border:      @list-group-active-bg;
-//** Text color for content within active list items
-@list-group-active-text-color:  lighten(@list-group-active-bg, 40%);
-
-//** Text color of disabled list items
-@list-group-disabled-color:      @gray-light;
-//** Background color of disabled list items
-@list-group-disabled-bg:         @gray-lighter;
-//** Text color for content within disabled list items
-@list-group-disabled-text-color: @list-group-disabled-color;
-
-@list-group-link-color:         #555;
-@list-group-link-hover-color:   @list-group-link-color;
-@list-group-link-heading-color: #333;
-
-
-//== Panels
-//
-//##
-
-@panel-bg:                    #fff;
-@panel-body-padding:          15px;
-@panel-heading-padding:       10px 15px;
-@panel-footer-padding:        @panel-heading-padding;
-@panel-border-radius:         @border-radius-base;
-
-//** Border color for elements within panels
-@panel-inner-border:          @table-border-color;
-@panel-footer-bg:             #f5f5f5;
-
-@panel-default-text:          @gray-dark;
-@panel-default-border:        @table-border-color;
-@panel-default-heading-bg:    #f5f5f5;
-
-@panel-primary-text:          #fff;
-@panel-primary-border:        @brand-primary;
-@panel-primary-heading-bg:    @brand-primary;
-
-@panel-success-text:          #fff;
-@panel-success-border:        @state-success-border;
-@panel-success-heading-bg:    @brand-success;
-
-@panel-info-text:             #fff;
-@panel-info-border:           @state-info-border;
-@panel-info-heading-bg:       @brand-info;
-
-@panel-warning-text:          #fff;
-@panel-warning-border:        @state-warning-border;
-@panel-warning-heading-bg:    @brand-warning;
-
-@panel-danger-text:           #fff;
-@panel-danger-border:         @state-danger-border;
-@panel-danger-heading-bg:     @brand-danger;
-
-
-//== Thumbnails
-//
-//##
-
-//** Padding around the thumbnail image
-@thumbnail-padding:           4px;
-//** Thumbnail background color
-@thumbnail-bg:                @body-bg;
-//** Thumbnail border color
-@thumbnail-border:            @table-border-color;
-//** Thumbnail border radius
-@thumbnail-border-radius:     @border-radius-base;
-
-//** Custom text color for thumbnail captions
-@thumbnail-caption-color:     @text-color;
-//** Padding around the thumbnail caption
-@thumbnail-caption-padding:   9px;
-
-
-//== Wells
-//
-//##
-
-@well-bg:                     @jumbotron-bg;
-@well-border:                 darken(@well-bg, 7%);
-
-
-//== Badges
-//
-//##
-
-@badge-color:                 #fff;
-//** Linked badge text color on hover
-@badge-link-hover-color:      #fff;
-@badge-bg:                    @btn-primary-bg;
-
-//** Badge text color in active nav link
-@badge-active-color:          @link-color;
-//** Badge background color in active nav link
-@badge-active-bg:             #fff;
-
-@badge-font-weight:           bold;
-@badge-line-height:           1;
-@badge-border-radius:         10px;
-
-
-//== Breadcrumbs
-//
-//##
-
-@breadcrumb-padding-vertical:   8px;
-@breadcrumb-padding-horizontal: 15px;
-//** Breadcrumb background color
-@breadcrumb-bg:                 #f5f5f5;
-//** Breadcrumb text color
-@breadcrumb-color:              @gray-light;
-//** Text color of current page in the breadcrumb
-@breadcrumb-active-color:       @gray-dark;
-//** Textual separator for between breadcrumb elements
-@breadcrumb-separator:          "/";
-
-
-//== Carousel
-//
-//##
-
-@carousel-text-shadow:                        0 1px 2px rgba(0,0,0,.6);
-
-@carousel-control-color:                      #fff;
-@carousel-control-width:                      15%;
-@carousel-control-opacity:                    .5;
-@carousel-control-font-size:                  20px;
-
-@carousel-indicator-active-bg:                #fff;
-@carousel-indicator-border-color:             #fff;
-
-@carousel-caption-color:                      #fff;
-
-
-//== Close
-//
-//##
-
-@close-font-weight:           bold;
-@close-color:                 #fff;
-@close-text-shadow:           0 1px 0 #fff;
-
-
-//== Code
-//
-//##
-
-@code-color:                  #c7254e;
-@code-bg:                     #f9f2f4;
-
-@kbd-color:                   #fff;
-@kbd-bg:                      #333;
-
-@pre-bg:                      #f5f5f5;
-@pre-color:                   @gray-dark;
-@pre-border-color:            #ccc;
-@pre-scrollable-max-height:   340px;
-
-
-//== Type
-//
-//##
-
-//** Horizontal offset for forms and lists.
-@component-offset-horizontal: 180px;
-//** Text muted color
-@text-muted:                  @gray-light;
-//** Abbreviations and acronyms border color
-@abbr-border-color:           @gray-light;
-//** Headings small color
-@headings-small-color:        @gray-light;
-//** Blockquote small color
-@blockquote-small-color:      @gray;
-//** Blockquote font size
-@blockquote-font-size:        (@font-size-base * 1.25);
-//** Blockquote border color
-@blockquote-border-color:     @table-border-color;
-//** Page header border color
-@page-header-border-color:    @table-border-color;
-//** Width of horizontal description list titles
-@dl-horizontal-offset:        @component-offset-horizontal;
-//** Horizontal line color.
-@hr-border:                   @table-border-color;
diff --git a/searx/templates/oscar/base.html b/searx/templates/oscar/base.html
index 5a3ba9f42..57c4d5593 100644
--- a/searx/templates/oscar/base.html
+++ b/searx/templates/oscar/base.html
@@ -10,11 +10,7 @@
     {% block meta %}{% endblock %}
     {% block title %}{% endblock %}searx
     
-    {% if bootstrap_theme == 'default' %}
-        
-    {% else %}
-        
-    {% endif %}
+    
       
     
 
diff --git a/searx/templates/oscar/preferences.html b/searx/templates/oscar/preferences.html
index 14bbace32..f6f14501e 100644
--- a/searx/templates/oscar/preferences.html
+++ b/searx/templates/oscar/preferences.html
@@ -14,7 +14,6 @@
     
     
 
@@ -102,28 +101,6 @@
             
             
         
-        
-        

-            
-        
-            

-            

-                

-                    
-                    

-                        
-                    

-                    {{ _('Change style of this layout') }}
-                

-            

-            

-        

         

 
             
diff --git a/searx/webapp.py b/searx/webapp.py
index f365c33b1..e25156f40 100644
--- a/searx/webapp.py
+++ b/searx/webapp.py
@@ -262,9 +262,6 @@ def render(template_name, override_theme=None, **kwargs):
     if 'autocomplete' not in kwargs:
         kwargs['autocomplete'] = autocomplete
 
-    if 'bootstrap_theme' not in kwargs:
-        kwargs['bootstrap_theme'] = request.cookies.get('bootstrap_theme', 'default')
-
     kwargs['searx_version'] = VERSION_STRING
 
     kwargs['method'] = request.cookies.get('method', 'POST')
@@ -467,7 +464,6 @@ def preferences():
     Settings that are going to be saved as cookies."""
     lang = None
     image_proxy = request.cookies.get('image_proxy', settings['server'].get('image_proxy'))
-    bootstrap_themes = ['default', 'simplex', 'yeti', 'readable']
 
     if request.cookies.get('language')\
        and request.cookies['language'] in (x[0] for x in language_codes):
@@ -482,7 +478,6 @@ def preferences():
         locale = None
         autocomplete = ''
         method = 'POST'
-        bootstrap_theme = None
         for pd_name, pd in request.form.items():
             if pd_name.startswith('category_'):
                 category = pd_name[9:]
@@ -507,11 +502,6 @@ def preferences():
                     blocked_engines.append(engine_name)
             elif pd_name == 'theme':
                 theme = pd if pd in themes else default_theme
-            elif pd_name == 'bootstrap_theme':
-                if pd in bootstrap_themes:
-                    bootstrap_theme = pd
-                else:
-                    bootstrap_theme = 'default'
 
         resp = make_response(redirect(url_for('index')))
 
@@ -553,9 +543,6 @@ def preferences():
 
         resp.set_cookie('theme', theme, max_age=cookie_max_age)
 
-        if bootstrap_theme:
-            resp.set_cookie('bootstrap_theme', bootstrap_theme, max_age=cookie_max_age)
-
         return resp
     return render('preferences.html',
                   locales=settings['locales'],
@@ -568,7 +555,6 @@ def preferences():
                   autocomplete_backends=autocomplete_backends,
                   shortcuts={y: x for x, y in engine_shortcuts.items()},
                   themes=themes,
-                  bootstrap_themes=bootstrap_themes,
                   theme=get_current_theme_name())