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

body {
    overflow: hidden;
    background: #0a0a1a;
    font-family: 'Outfit', sans-serif;
    color: #e0e0e0;
    -webkit-font-smoothing: antialiased;
}

#scene-container {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
}

#scene-container canvas {
    display: block;
}

/* HUD */
#hud {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 10;
    background: rgba(10, 10, 30, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 12px;
    padding: 14px 18px;
    min-width: 180px;
}

.hud-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    gap: 16px;
}
.hud-row:last-child { margin-bottom: 0; }

.hud-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 9px;
    font-weight: 300;
    letter-spacing: 1.5px;
    color: #667;
    text-transform: uppercase;
}

.hud-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 700;
    color: #00d4ff;
    text-align: right;
}

.spaghetti .hud-value {
    color: #39ff14;
    transition: color 0.3s;
}

/* Status Banner */
#status-banner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 20;
    background: rgba(10, 10, 30, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 12px;
    padding: 20px 40px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    color: #00d4ff;
    letter-spacing: 1px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s;
}
#status-banner.visible {
    opacity: 1;
}

/* Control Panel */
#control-panel {
    position: fixed;
    bottom: 16px;
    left: 16px;
    z-index: 10;
    width: 300px;
    background: rgba(10, 10, 30, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px 10px;
}

.panel-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 3px;
    color: #00d4ff;
}

.panel-toggle-btn {
    background: none;
    border: none;
    color: #667;
    font-size: 14px;
    cursor: pointer;
    transition: transform 0.3s;
    display: none;
}

#panel-body {
    padding: 0 18px 8px;
    max-height: 500px;
    overflow-y: auto;
    transition: max-height 0.3s ease;
}

#panel-body.collapsed {
    max-height: 0;
    padding: 0 18px;
    overflow: hidden;
}

.control-group {
    margin-bottom: 14px;
}

.control-label {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 9px;
    font-weight: 300;
    letter-spacing: 1.5px;
    color: #556;
    margin-bottom: 8px;
    text-transform: uppercase;
}

/* Model Grid */
.model-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 4px;
}

.model-btn {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 8px;
    color: #aab;
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    padding: 8px 4px;
    cursor: pointer;
    transition: all 0.2s;
}
.model-btn:hover {
    background: rgba(0, 212, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.2);
    color: #dde;
}
.model-btn.active {
    background: rgba(0, 212, 255, 0.12);
    border-color: rgba(0, 212, 255, 0.4);
    color: #00d4ff;
}

/* Color Grid */
.color-grid {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.color-swatch {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}
.color-swatch:hover {
    transform: scale(1.15);
}
.color-swatch.active {
    border-color: #00d4ff;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.4);
}

/* Speed Slider */
.speed-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.speed-label-left, .speed-label-right {
    font-size: 16px;
    user-select: none;
}

#speed-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    outline: none;
}

#speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #00d4ff;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
}

#speed-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #00d4ff;
    cursor: pointer;
    border: none;
}

.speed-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    color: #667;
    text-align: center;
    margin-top: 4px;
}

/* Layer Progress */
.layer-info {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: #aab;
    margin-bottom: 6px;
}

.progress-bar-bg {
    width: 100%;
    height: 4px;
    background: rgba(255,255,255,0.08);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #00d4ff, #39ff14);
    border-radius: 2px;
    transition: width 0.15s;
}

/* Buttons */
.buttons-row {
    display: flex;
    gap: 6px;
}

.ctrl-btn {
    flex: 1;
    padding: 10px 6px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.08);
    font-family: 'Outfit', sans-serif;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.play-btn {
    background: rgba(0, 212, 255, 0.15);
    color: #00d4ff;
    border-color: rgba(0, 212, 255, 0.3);
}
.play-btn:hover:not(:disabled) {
    background: rgba(0, 212, 255, 0.25);
}

.pause-btn {
    background: rgba(255, 170, 0, 0.1);
    color: #ffaa00;
    border-color: rgba(255, 170, 0, 0.2);
}
.pause-btn:hover:not(:disabled) {
    background: rgba(255, 170, 0, 0.2);
}

.reset-btn {
    background: rgba(255, 68, 68, 0.1);
    color: #ff6666;
    border-color: rgba(255, 68, 68, 0.2);
}
.reset-btn:hover:not(:disabled) {
    background: rgba(255, 68, 68, 0.2);
}

.ctrl-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.panel-footer {
    padding: 8px 18px 12px;
    text-align: center;
}
.panel-footer a {
    font-size: 10px;
    color: #445;
    text-decoration: none;
    letter-spacing: 0.5px;
}
.panel-footer a:hover {
    color: #00d4ff;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: 100;
    background: rgba(10, 10, 30, 0.92);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 12px;
    padding: 14px 28px;
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: #e0e0e0;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.4s, transform 0.4s;
    pointer-events: none;
}
.toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.toast.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
}

/* Confetti */
#confetti-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 50;
    pointer-events: none;
}

/* Mobile */
@media (max-width: 640px) {
    #control-panel {
        left: 8px;
        right: 8px;
        bottom: 8px;
        width: auto;
        max-height: 55vh;
    }

    .panel-toggle-btn {
        display: block;
    }

    #hud {
        top: 8px;
        right: 8px;
        min-width: 150px;
        padding: 10px 14px;
    }

    .hud-label { font-size: 8px; }
    .hud-value { font-size: 11px; }

    .model-grid {
        grid-template-columns: 1fr 1fr;
    }
}