:root {
    --primary: #ff8a4d;
    --secondary: #ff6136;
    --bg: #120d0d;
    --glass: rgba(24, 14, 14, 0.92);
    --glass-heavy: rgba(18, 11, 11, 0.98);
    --line: rgba(255, 180, 128, 0.18);
    --line-strong: rgba(255, 180, 128, 0.34);
    --text: #f6f1ee;
    --muted: #c8b6ae;
}

body[data-dashboard-theme="water"] {
    --primary: #59b6ff;
    --secondary: #2f8cf0;
    --bg: #0d1522;
    --glass: rgba(12, 21, 37, 0.94);
    --glass-heavy: rgba(10, 17, 29, 0.98);
    --line: rgba(114, 190, 255, 0.18);
    --line-strong: rgba(114, 190, 255, 0.34);
    --text: #eef5ff;
    --muted: #a9bfd8;
}

body[data-dashboard-theme="nature"] {
    --primary: #82cd5f;
    --secondary: #58a23c;
    --bg: #11170f;
    --glass: rgba(18, 24, 16, 0.94);
    --glass-heavy: rgba(13, 19, 11, 0.98);
    --line: rgba(146, 213, 120, 0.18);
    --line-strong: rgba(146, 213, 120, 0.34);
    --text: #f2f8ee;
    --muted: #bccfaf;
}

body[data-dashboard-theme="rock"] {
    --primary: #c4ae8a;
    --secondary: #9b8563;
    --bg: #151515;
    --glass: rgba(24, 24, 24, 0.95);
    --glass-heavy: rgba(16, 16, 16, 0.98);
    --line: rgba(196, 190, 176, 0.18);
    --line-strong: rgba(196, 190, 176, 0.34);
    --text: #f2efea;
    --muted: #b7aea2;
}

/* Base Styles & Centering */
body { 
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; 
    background:
        radial-gradient(circle at top right, color-mix(in srgb, var(--primary) 16%, transparent) 0%, transparent 38%),
        radial-gradient(circle at center, color-mix(in srgb, var(--secondary) 14%, transparent) 0%, transparent 42%),
        var(--bg);
    color: var(--text); 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

/* Main App Container */
.container { 
    background: var(--glass); 
    padding: 30px; 
    border-radius: 24px; 
    border: 1px solid var(--line);
    backdrop-filter: blur(12px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    text-align: center; 
    max-width: 550px;
    width: 100%;
    margin-bottom: 20px; /* Space for sidebar on mobile */
}

h1 {
    margin: 0 0 20px 0;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 2.2rem;
    font-weight: 800;
}

.section-label {
    display: block;
    margin: 20px 0 10px;
    font-size: 0.75rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: bold;
}

/* Buttons & Grids */
.button-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(85px, 1fr));
    gap: 8px;
    margin-bottom: 15px;
}

#waveSelectors {
    grid-template-columns: repeat(4, 1fr);
}

#waveSelectors .lock-btn {
    grid-column: span 4;
    padding: 8px;
    margin-top: 5px;
}

button { 
    padding: 10px; 
    border-radius: 10px; 
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.07);
    color: var(--text); 
    cursor: pointer; 
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.9rem;
}

button:hover { 
    background: rgba(255,255,255,0.15); 
    transform: translateY(-1px); 
}

button.active { 
    background: var(--primary); 
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(255, 138, 0, 0.3);
}

/* Controls Section */
.controls { 
    background: rgba(0,0,0,0.25);
    padding: 20px;
    border-radius: 18px;
    margin-bottom: 25px;
}

.control-group { 
    display: flex; 
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.control-header label {
    font-size: 0.85rem;
    width: 50px;
    text-align: left;
}

input[type=range] { 
    flex: 1; 
    accent-color: var(--primary);
    height: 6px;
    cursor: pointer;
}

/* ADSR Layout */
.adsr-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--line);
}

.adsr-grid .control-group {
    margin-bottom: 0;
}

/* Main Play/Save Actions */
.main-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.btn-play { 
    grid-column: span 2;
    background: linear-gradient(135deg, #00c9ff, #007bff); 
    font-weight: bold;
    font-size: 1.1rem;
    padding: 15px;
}

.btn-download, .btn-save, .btn-load {
    font-weight: 600;
    font-size: 0.85rem;
}

.btn-download { background: linear-gradient(135deg, var(--primary), var(--secondary)); }
.btn-save { background: #333; }
.btn-load { background: #333; }

/* Visualizer */
.visualizer-container {
    width: 100%;
    height: 80px;
    background: #000;
    border-radius: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--line);
}

canvas {
    width: 100%;
    height: 100%;
}

/* Lock Button */
.lock-btn {
    background: none;
    border: none;
    color: var(--muted);
    font-size: 1rem;
    padding: 4px;
}

.lock-btn.locked { color: var(--primary); }

/* SIDEBAR: Bottom Right Floating */
.presets-sidebar {
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: 280px;
    max-height: 300px;
    background: var(--glass-heavy);
    border-radius: 20px;
    padding: 18px;
    border: 1px solid var(--line-strong);
    backdrop-filter: blur(20px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.6);
    z-index: 1000;
    overflow-y: auto;
}

.presets-sidebar h3 {
    margin-top: 0;
    font-size: 1rem;
    color: var(--primary);
    border-bottom: 1px solid var(--line);
    padding-bottom: 10px;
    margin-bottom: 12px;
}

.preset-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255,255,255,0.05);
    padding: 8px 10px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.btn-load-preset {
    background: none;
    border: none;
    color: var(--text);
    font-size: 0.85rem;
    text-align: left;
    padding: 0;
}

.btn-delete-preset {
    background: rgba(255, 50, 50, 0.2);
    color: #ff8888;
    padding: 4px 8px;
    font-size: 0.7rem;
}

/* Scrollbar Style */
.presets-sidebar::-webkit-scrollbar { width: 5px; }
.presets-sidebar::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--primary) 30%, transparent); border-radius: 10px; }

/* Responsive Adjustments */
@media (max-width: 768px) {
    .container {
        padding: 20px;
        margin-top: 20px;
    }
    
    .presets-sidebar {
        position: relative; /* Moves under content */
        right: 0;
        bottom: 0;
        width: 100%;
        max-width: 550px;
        max-height: none;
        box-sizing: border-box;
    }
}

@media (max-width: 400px) {
    h1 { font-size: 1.6rem; }
    .main-actions { grid-template-columns: 1fr; }
    #waveSelectors { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
    body[data-dashboard-theme] {
        padding-inline: 12px;
        align-items: stretch;
    }

    body[data-dashboard-theme] .container,
    body[data-dashboard-theme] .presets-sidebar {
        max-width: 100%;
    }

    body[data-dashboard-theme] .adsr-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    body[data-dashboard-theme] .control-group {
        display: grid;
        grid-template-columns: minmax(42px, auto) minmax(0, 1fr) auto;
        width: 100%;
    }

    body[data-dashboard-theme] .control-group input[type=range] {
        width: 100%;
        min-width: 0;
    }
}

body[data-dashboard-sidebar-externalized] .controls {
    display: none !important;
}