/* Voxel XPBD Physics Simulator - Dark Theme Styles */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #0a0a0f;
    color: #e0e0ff;
    overflow-x: hidden;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, #1a1a2e 0%, #0a0a0f 100%);
    border-radius: 10px;
    border: 1px solid #4466ff;
}

header h1 {
    font-size: 2.5rem;
    color: #4466ff;
    margin-bottom: 10px;
    text-shadow: 0 0 20px rgba(68, 102, 255, 0.5);
}

.subtitle {
    font-size: 1.1rem;
    color: #8888aa;
    font-style: italic;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 20px;
}

.canvas-container {
    position: relative;
    background: #0a0a0f;
    border: 2px solid #4466ff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(68, 102, 255, 0.2);
}

#simulationCanvas {
    display: block;
    width: 100%;
    height: 700px;
    cursor: crosshair;
}

.stats {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(10, 10, 15, 0.9);
    border: 1px solid #4466ff;
    border-radius: 8px;
    padding: 10px 15px;
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-label {
    color: #8888aa;
    font-size: 0.75rem;
    margin-bottom: 2px;
}

.stat-value {
    color: #4466ff;
    font-weight: bold;
    font-size: 1.1rem;
}

.controls {
    background: #1a1a2e;
    border: 1px solid #4466ff;
    border-radius: 10px;
    padding: 20px;
    max-height: 700px;
    overflow-y: auto;
}

.control-section {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #2a2a4e;
}

.control-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.control-section h3 {
    color: #4466ff;
    font-size: 1.2rem;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.control-group {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.btn {
    flex: 1;
    padding: 12px 20px;
    border: 1px solid #4466ff;
    background: #0a0a0f;
    color: #4466ff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover {
    background: #4466ff;
    color: #0a0a0f;
    box-shadow: 0 0 15px rgba(68, 102, 255, 0.5);
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: #4466ff;
    color: #0a0a0f;
}

.btn-primary:hover {
    background: #5577ff;
}

.btn-secondary {
    background: #2a2a4e;
    color: #e0e0ff;
    border-color: #8888aa;
}

.btn-secondary:hover {
    background: #3a3a6e;
    border-color: #4466ff;
}

.control {
    margin-bottom: 15px;
}

.control label {
    display: block;
    color: #8888aa;
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.control input[type="range"] {
    width: 100%;
    height: 6px;
    background: #2a2a4e;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: #4466ff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(68, 102, 255, 0.5);
    transition: all 0.2s ease;
}

.control input[type="range"]::-webkit-slider-thumb:hover {
    background: #5577ff;
    transform: scale(1.2);
}

.control input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: #4466ff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(68, 102, 255, 0.5);
    transition: all 0.2s ease;
}

.control input[type="range"]::-moz-range-thumb:hover {
    background: #5577ff;
    transform: scale(1.2);
}

.control input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
}

.preset-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.btn-preset {
    padding: 10px 15px;
    font-size: 0.85rem;
}

.btn-preset.active {
    background: #4466ff;
    color: #0a0a0f;
}

.help-text {
    color: #8888aa;
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: 10px;
}

.info-box {
    background: #0a0a0f;
    border: 1px solid #2a2a4e;
    border-radius: 6px;
    padding: 15px;
    font-size: 0.85rem;
}

.info-box p {
    margin-bottom: 10px;
    line-height: 1.5;
}

.info-box p:last-child {
    margin-bottom: 0;
}

.info-box strong {
    color: #4466ff;
}

.info-box ul {
    margin-left: 20px;
    margin-top: 10px;
}

.info-box li {
    margin-bottom: 5px;
    line-height: 1.4;
    color: #a0a0cc;
}

/* Scrollbar Styling */
.controls::-webkit-scrollbar {
    width: 8px;
}

.controls::-webkit-scrollbar-track {
    background: #0a0a0f;
    border-radius: 4px;
}

.controls::-webkit-scrollbar-thumb {
    background: #4466ff;
    border-radius: 4px;
}

.controls::-webkit-scrollbar-thumb:hover {
    background: #5577ff;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .controls {
        max-height: none;
    }

    #simulationCanvas {
        height: 500px;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .preset-buttons {
        grid-template-columns: 1fr;
    }

    .stats {
        flex-wrap: wrap;
        gap: 10px;
    }

    #simulationCanvas {
        height: 400px;
    }
}

/* Animation for pulse effect */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.btn-primary:hover {
    animation: pulse 1s ease-in-out infinite;
}

/* Gradient text effect */
.gradient-text {
    background: linear-gradient(135deg, #4466ff 0%, #8888ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}