:root {
    --bg-dark: #070913;
    --grad-1: #1a1c2c;
    --grad-2: #241b35;
    --grad-3: #111827;
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.06);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #818cf8;
    --accent-glow: rgba(129, 140, 248, 0.5);
    --master-accent: #38bdf8;
    --master-glow: rgba(56, 189, 248, 0.5);
    --led-red: #ef4444;
    --led-green: #10b981;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    font-family: -apple-system, system-ui, sans-serif;
    overscroll-behavior-y: none;
    overflow: hidden;
}

.ambient-bg {
    position: fixed;
    top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at 50% 50%, var(--grad-1), var(--grad-2), var(--grad-3), var(--bg-dark));
    background-size: 150% 150%;
    animation: slowPan 30s ease-in-out infinite alternate;
    z-index: -1;
    filter: blur(60px);
}

@keyframes slowPan {
    0% { transform: translate(0, 0); }
    100% { transform: translate(5%, 5%); }
}

.app-wrapper {
    width: 95%;
    max-width: 1000px;
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: 32px;
    padding: 35px 30px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.brand h1 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 45%, #94a3b8 55%, #f8fafc 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0px 3px 3px rgba(0, 0, 0, 0.7));
}

.brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 6px;
    letter-spacing: 0.5px;
}

.global-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.compact-timer {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.25);
    padding: 6px 12px;
    border-radius: 100px;
    border: 1px solid var(--glass-border);
    cursor: pointer;
    position: relative;
    height: 44px;
}

.timer-display {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    pointer-events: none;
}

.glass-select {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0;
    cursor: pointer;
}

.shifted-right { margin-left: 4px; }

.play-pause-btn {
    width: 48px; height: 48px; border-radius: 50%; border: none;
    background: var(--accent); color: #fff; cursor: pointer;
    box-shadow: 0 0 20px var(--accent-glow); display: flex; justify-content: center; align-items: center;
    transition: transform 0.2s;
}

.play-pause-btn:hover { transform: scale(1.05); }

.presets-section { margin-bottom: 40px; }
.master-volume-section { margin-top: 40px; }

.mixer-section {
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    gap: 15px;
    padding: 20px 0;
    overflow-x: auto;
    overflow-y: hidden;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
}

@media (min-width: 1024px) {
    .mixer-section {
        justify-content: space-evenly;
        overflow-x: hidden;
    }
}

.mixer-section::-webkit-scrollbar { display: none; }
.mixer-section { scrollbar-width: none; }

.sound-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    flex: 0 0 100px;
    min-width: 100px;
}

.status-indicator {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--led-red); box-shadow: 0 0 5px rgba(239, 68, 68, 0.4); transition: all 0.3s ease;
}

.status-indicator.active {
    background: var(--led-green); box-shadow: 0 0 10px rgba(16, 185, 129, 0.8);
}

.premium-slider {
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    cursor: pointer;
    outline: none;
    border-radius: 8px;
    box-shadow: inset 0 2px 6px rgba(0,0,0,0.9), 0 1px 1px rgba(255,255,255,0.05);
    border: 1px solid rgba(0,0,0,0.6);
    touch-action: pan-x pan-y;
}

.track-slider {
    width: 8px;
    height: 150px;
    -webkit-appearance: slider-vertical; 
    writing-mode: bt-lr;
}

.track-slider::-webkit-slider-runnable-track, .master-slider::-webkit-slider-runnable-track {
    background: transparent;
    border: none;
}

.sound-row input[type=range] {
    --val: 0%;
    background: linear-gradient(0deg, var(--accent) var(--val), rgba(0,0,0,0.5) var(--val));
}

.track-slider::-webkit-slider-thumb, .master-slider::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    height: 20px; width: 20px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #ffffff 0%, #cbd5e1 100%);
    border: 1px solid rgba(255,255,255,0.9);
    box-shadow: 0 2px 5px rgba(0,0,0,0.5), inset 0 -1px 3px rgba(0,0,0,0.2);
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease, border-color 0.2s ease;
}

.track-slider:hover::-webkit-slider-thumb, .master-slider:hover::-webkit-slider-thumb {
    transform: scale(1.15);
    box-shadow: 0 4px 10px rgba(0,0,0,0.6), 0 0 15px rgba(255,255,255,0.3);
}

.track-slider.active-slider::-webkit-slider-thumb {
    border-color: #fff;
    box-shadow: 0 0 15px var(--accent-glow), 0 0 25px var(--accent), inset 0 -1px 3px rgba(0,0,0,0.2);
}

.master-row {
    display: flex; align-items: center; justify-content: space-between; gap: 20px; width: 100%;
}

.master-slider {
    flex: 1; height: 10px;
    --val: 80%;
    background: linear-gradient(90deg, var(--master-accent) var(--val), rgba(0,0,0,0.5) var(--val));
}

.master-slider.active-slider::-webkit-slider-thumb {
    border-color: #fff;
    box-shadow: 0 0 15px var(--master-glow), 0 0 25px var(--master-accent), inset 0 -1px 3px rgba(0,0,0,0.2);
}

.sound-name { font-size: 0.8rem; font-weight: 500; color: var(--text-secondary); text-align: center; }
.preset-scroll { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 5px; }
.preset-pill { background: rgba(255,255,255,0.03); border: 1px solid var(--glass-border); color: var(--text-secondary); padding: 10px 18px; border-radius: 100px; cursor: pointer; transition: 0.2s; white-space: nowrap; }
.preset-pill.active { background: var(--accent); color: #fff; }
.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--glass-border), transparent); margin: 25px 0; }
.hidden { display: none !important; }