:root {
    --bg-color: #050510;
    --text-color: #e0e0e0;
    --accent-color: #00ff88;
    --panel-bg: rgba(20, 20, 35, 0.9);
    --border-color: rgba(255, 255, 255, 0.15);
}

body {
    margin: 0;
    overflow: hidden;
    background-color: var(--bg-color);
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--text-color);
}

canvas {
    display: block;
    width: 100vw;
    height: 100vh;
}

/* Overlay for Step Explanation */
.step-overlay {
    position: absolute;
    top: 100px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 10;
    transition: opacity 0.3s;
}

.step-card {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(12px);
    padding: 20px 32px;
    border-radius: 12px;
    border: 1px solid var(--accent-color);
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 255, 136, 0.2);
}

.step-card h3 {
    margin: 0 0 8px 0;
    color: var(--accent-color);
    font-size: 1.2rem;
}

.step-card p {
    margin: 0;
    font-size: 1rem;
    color: #fff;
}

.back-to-home {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9rem;
    background: rgba(0, 0, 0, 0.5);
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    transition: all 0.3s ease;
}

.back-to-home:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    transform: translateY(-1px);
}

.sidebar {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 340px;
    max-height: calc(100vh - 40px);
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* Toggle Button */
.sidebar-toggle {
    display: none; /* Hidden on desktop */
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 20;
}

.sidebar-toggle::after {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
    margin-top: -4px;
    transition: transform 0.3s;
}

.sidebar.collapsed .sidebar-toggle::after {
    transform: rotate(-135deg);
    margin-top: 4px;
}

.eyebrow {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    margin: 0 0 8px 0;
    font-weight: 600;
}

h1 {
    margin: 0 0 12px 0;
    font-size: 1.5rem;
    line-height: 1.2;
}

.intro {
    font-size: 0.95rem;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.control-group label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 8px;
}

.button-group {
    display: flex;
    gap: 8px;
}

.button-group.vertical {
    flex-direction: column;
}

button {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 12px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.2s;
    text-align: left;
}

button:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

button.active {
    background: rgba(0, 255, 136, 0.1);
    color: var(--accent-color);
    border-color: var(--accent-color);
    font-weight: 600;
}

button.primary {
    background: linear-gradient(135deg, var(--accent-color), #00cc6a);
    color: #000;
    border: none;
    font-weight: 600;
    padding: 16px;
    margin-top: 8px;
    text-align: center;
    font-size: 1.1rem;
}

button.primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 255, 136, 0.3);
}

button.primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.legend ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 12px;
}

.legend li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.4;
}

.chip {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    flex-shrink: 0;
    margin-top: 2px;
}

.chip.token { background: #4488ff; border: 1px solid #88bbee; }
.chip.attention { background: #ffcc00; box-shadow: 0 0 5px #ffcc00; }
.chip.prediction { background: #00ff88; }

.token-stream {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    background: rgba(0,0,0,0.6);
    padding: 16px 24px;
    border-radius: 16px;
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
}

.stream-token {
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: monospace;
    font-size: 1.1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s;
}

.stream-token.new {
    background: var(--accent-color);
    color: #000;
    font-weight: bold;
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.4);
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        left: 0;
        right: 0;
        bottom: 0;
        top: auto;
        max-height: 45vh;
        border-radius: 16px 16px 0 0;
        padding-top: 40px;
        transform: translateY(0);
    }
    .sidebar.collapsed {
        transform: translateY(calc(100% - 60px));
    }
    
    .sidebar-toggle {
        display: flex;
        top: 15px;
        right: 50%;
        transform: translateX(50%);
    }
    
    .token-stream {
        bottom: auto;
        top: 80px;
        width: 90%;
        flex-wrap: wrap;
        justify-content: center;
    }
    .step-overlay {
        top: 160px;
        width: 90%;
    }
}