:root {
    --bg-dark: #1a1a1a;
    --bg-medium: #2d2d2d;
    --bg-light: #3d3d3d;
    --text-color: #e0e0e0;
    --border-color: #555;
    --primary-color: #4a90e2;
    --success-color: #5cb85c;
    --danger-color: #d9534f;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Courier New', monospace;
    background: var(--bg-dark);
    color: var(--text-color);
    overflow: hidden;
}

#game-container {
    width: 100vw;
    height: 100vh;
    position: relative;
}

#gameCanvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* Login Screen */
login-screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

/* Stats Display */
stats-display {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--bg-medium);
    border: 2px solid var(--border-color);
    padding: 15px;
    min-width: 250px;
    z-index: 100;
}

/* Building Toolbox */
building-toolbox {
    position: absolute;
    left: 10px;
    top: 120px;
    background: var(--bg-medium);
    border: 2px solid var(--border-color);
    padding: 10px;
    width: 250px;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    z-index: 100;
}

/* Chat Box */
chat-box {
    position: absolute;
    bottom: 10px;
    left: 10px;
    width: 400px;
    height: 200px;
    background: black;
    border: 2px solid var(--border-color);
    z-index: 100;
}

/* Context Menu */
context-menu {
    position: absolute;
    background: var(--bg-medium);
    border: 2px solid var(--border-color);
    padding: 5px;
    min-width: 150px;
    display: none;
    z-index: 200;
}

/* Common Styles */
.button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    cursor: pointer;
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

.button:hover {
    opacity: 0.8;
}

.button:disabled {
    background: var(--bg-light);
    cursor: not-allowed;
    opacity: 0.5;
}

input[type="text"] {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    width: 100%;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
}

::-webkit-scrollbar-thumb:hover {
    background: #666;
}