/* Audio Technical Styling - Dark Theme with Oscilloscope Aesthetics */

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-panel: #2a2a2a;
    --accent-green: #00ff41;
    --accent-blue: #00bfff;
    --accent-orange: #ff8c00;
    --accent-red: #ff4444;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #606060;
    --border-color: #404040;
    --grid-color: #333333;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    --shadow-soft: 0 2px 10px rgba(0, 0, 0, 0.3);
    --border-radius: 8px;
    --border-radius-small: 4px;
    --transition: all 0.2s ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Container Layout */
.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 100%;
    margin: 0 auto;
    gap: 1rem;
    padding: 1rem;
}

/* Top Bar */
.top-bar {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: visible;
    transition: var(--transition);
}

/* Header content always visible on large screens */
.header-content {
    display: grid;
    grid-template-columns: 1fr 240px 1fr;
    gap: 2rem;
    align-items: flex-start;
    transition: all 0.3s ease;
    overflow: visible;
    margin-top: 0;
}

/* Header section styling for row layout */
.header-section {
    min-width: 0;
    padding-top: 2.5rem;
}

/* Title styling - absolute positioning for compact layout */
.top-bar > h1 {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    margin: 0 !important;
    font-size: 1.8rem !important;
    font-weight: 600;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    z-index: 10;
}

/* Collapsible Toggle Buttons */
.section-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--accent-blue);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--border-radius-small);
    transition: var(--transition);
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.section-toggle:hover {
    background: rgba(0, 191, 255, 0.1);
    transform: scale(1.1);
}

.section-toggle.collapsed {
    transform: rotate(180deg);
}

.section-toggle.collapsed:hover {
    transform: rotate(180deg) scale(1.1);
}

/* Header toggle only visible on mobile */
.header-toggle {
    display: none;
    position: absolute;
    right: 6px;
    top: 8px;
}

.top-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-green) 0%, var(--accent-blue) 50%, var(--accent-orange) 100%);
}

.header-section h1 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.social-link a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-small);
}

.social-link a:hover {
    color: var(--accent-blue);
    background: rgba(0, 191, 255, 0.1);
}

/* Video Section */
#video-section {
    position: relative;
    width: 100%;
    height: 100%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Keyboard Overlay - Always covers the video area exactly */
.keyboard-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 33%;
    z-index: 5;
    display: none;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.1));
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    transition: transform 0.3s ease;
    /* Ensure it covers the entire bottom area exactly */
    box-sizing: border-box;
    width: 100%;
}

.keyboard-overlay.visible {
    display: flex;
}

.keyboard-key {
    flex: 1;
    height: 100%;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.8);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
    transition: background-color 0.2s ease, transform 0.3s ease;
    position: relative;
}

/* Counter-rotate text when keyboard is flipped */
.keyboard-overlay[style*="scaleX(-1)"] .keyboard-key {
    transform: scaleX(-1);
}

.keyboard-key:last-child {
    border-right: none;
}

/* .keyboard-key:nth-child(odd) {
    background: rgba(255, 255, 255, 0.15);
}

.keyboard-key:nth-child(even) {
    background: rgba(0, 191, 255, 0.15);
} */

.keyboard-key:hover {
    background: rgba(0, 255, 65, 0.3) !important;
}

.keyboard-key.hover {
    background: rgba(255, 255, 255, 0.3) !important;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.keyboard-key.active {
    background: rgba(0, 255, 65, 0.5) !important;
    transform: scale(1.05);
    box-shadow: 0 0 8px rgba(0, 255, 65, 0.6);
    border: 1px solid rgba(0, 255, 65, 0.8);
}



.video-play-icon {
    width: 60px;
    height: 60px;
    border: 3px solid var(--accent-green);
    border-radius: 50%;
    position: relative;
    transition: var(--transition);
}

.video-play-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 55%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    border-left: 20px solid var(--accent-green);
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
}

.video-play-icon.loading {
    animation: spin 1s linear infinite;
    border-color: var(--accent-orange) transparent var(--accent-orange) transparent;
}

.video-stop-text {
    position: absolute;
    top: 0;
    background: #fff2;
    border-radius: 1rem;
    color: #fffa;
    padding: 0.25rem 0.6rem;
    border: none;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.video-stop-text:hover,
.video-control-btn:hover {
    background: #fff4;
    transform: scale(1.1);
}

.video-controls {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: auto;
    min-height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.25rem;
    z-index: 15;
    /* Ensure it covers the entire top area exactly */
    box-sizing: border-box;
    width: 100%;
    padding: 0.5rem;
}

.video-controls-left,
.video-controls-right {
    display: flex;
    gap: 0.25rem;
    flex: 0 0 auto;
}

.video-controls-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.25rem;
}

.video-controls-right {
    justify-content: flex-end;
}

.video-control-btn {
    background: #fff3;
    border: none;
    border-radius: 1rem;
    color: #fff;
    padding: 0.75rem;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 100px;
    min-height: 100px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-control-btn.active {
    background: rgba(0, 255, 65, 0.8);
    border-color: rgba(0, 255, 65, 1);
}

#song-guide-btn {
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.3), rgba(0, 191, 255, 0.3));
}

#song-guide-btn:hover {
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.5), rgba(0, 191, 255, 0.5));
}

#song-guide-btn.active {
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.8), rgba(0, 191, 255, 0.8)) !important;
    animation: melodyPulse 1.5s ease-in-out infinite alternate;
}

.gesture-hover {
    background: rgba(255, 255, 255, 0.3) !important;
    transform: scale(1.1) !important;
    border-color: rgba(255, 255, 255, 0.8) !important;
}

/* Timer fill effect for keyboard keys */
.keyboard-key.timer-fill {
    background: linear-gradient(to right, 
        rgba(0, 255, 65, 0.7) var(--fill-percent, 0%), 
        rgba(255, 255, 255, 0.3) var(--fill-percent, 0%)) !important;
}

.keyboard-key.target {
    border: 2px solid rgba(255, 165, 0, 0.8) !important;
    box-shadow: 0 0 8px rgba(255, 165, 0, 0.6);
    animation: pulse 1s ease-in-out infinite alternate;
}

@keyframes pulse {
    from { box-shadow: 0 0 8px rgba(255, 165, 0, 0.6); }
    to { box-shadow: 0 0 16px rgba(255, 165, 0, 0.8); }
}

@keyframes melodyPulse {
    from { 
        box-shadow: 0 0 8px rgba(0, 255, 65, 0.6);
        transform: scale(1);
    }
    to { 
        box-shadow: 0 0 16px rgba(0, 255, 65, 0.9);
        transform: scale(1.05);
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes attentionPulse {
    from { 
        box-shadow: 0 0 0 0 rgba(0, 255, 65, 0.7);
        transform: scale(1);
    }
    to { 
        box-shadow: 0 0 0 10px rgba(0, 255, 65, 0);
        transform: scale(1.05);
    }
}

/* Presets Section */
.presets-section {
    background: transparent;
    border: none;
    border-radius: var(--border-radius);
    padding: 0;
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.presets-column {
    flex: 1;
}

.melody-column {
    flex: 0 0 auto;
    min-width: 100px;
}

.current-melody {
    margin-bottom: 0.75rem;
    padding: 0.25rem;
    background: rgba(0, 255, 65, 0.05);
    border: 1px solid rgba(0, 255, 65, 0.2);
    border-radius: var(--border-radius-small);
}

.melody-name {
    color: var(--accent-green);
    font-size: 0.8rem;
    font-weight: 500;
    font-family: 'SF Mono', Consolas, monospace;
    display: block;
    word-break: break-word;
}

.melody-controls {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.presets-section h3 {
    color: var(--accent-blue);
    margin-bottom: 0.5rem;
    font-size: 1.0rem;
    font-weight: 600;
}

.presets-controls {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.preset-row {
    display: grid;
    grid-template-columns: 1fr auto auto auto;
    gap: 0.5rem;
    align-items: center;
}

.preset-row:first-child {
    grid-template-columns: 1fr auto;
}

.preset-row:last-child {
    grid-template-columns: 1fr;
    justify-items: start;
}

.preset-input,
.preset-select {
    flex: 1;
    padding: 0.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition);
}

.preset-input:focus,
.preset-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(0, 191, 255, 0.2);
}

/* Main Layout */
.main-layout {
    display: grid;
    grid-template-columns: 400px 1fr 400px;
    gap: 1rem;
    flex: 1;
    min-height: 400px;
}

/* Sidebars */
.left-sidebar,
.right-sidebar {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-soft);
}

.control-section h3 {
    color: var(--accent-orange);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: var(--transition);
}

.control-section h3:hover {
    color: var(--accent-blue);
}

.control-section h3::before {
    content: '';
    width: 3px;
    height: 16px;
    background: var(--accent-orange);
    border-radius: 2px;
}

.control-section.collapsed .controls-grid {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.controls-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: all 0.3s ease;
    overflow: hidden;
}

/* Form Controls */
label {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    cursor: pointer;
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.label-text {
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
}

.label-value {
    color: var(--accent-green);
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'SF Mono', Consolas, monospace;
}

/* Sliders */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    background: var(--border-color);
    cursor: pointer;
    height: 4px;
    border-radius: 2px;
    outline: none;
    transition: var(--transition);
}

input[type="range"]::-webkit-slider-track {
    background: var(--border-color);
    height: 4px;
    border-radius: 2px;
}

input[type="range"]::-moz-range-track {
    background: var(--border-color);
    height: 4px;
    border-radius: 2px;
    border: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 18px;
    width: 18px;
    border-radius: 50%;
    background: var(--accent-green);
    cursor: pointer;
    border: 2px solid var(--bg-panel);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--accent-blue);
    transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
    height: 18px;
    width: 18px;
    border-radius: 50%;
    background: var(--accent-green);
    cursor: pointer;
    border: 2px solid var(--bg-panel);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

input[type="range"]::-moz-range-thumb:hover {
    background: var(--accent-blue);
    transform: scale(1.1);
}

/* Select Elements */
select {
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(0, 191, 255, 0.2);
}

/* Square Wave Controls */
.square-wave-control {
    display: none;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.square-wave-control.visible {
    display: flex !important;
    opacity: 1;
    transform: translateY(0);
}

/* Center Content - Waveform Display */
.center-content {
    display: flex;
    flex-direction: column;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.waveform-display {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
}

#waveformCanvas {
    flex: 1;
    background: #000;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    max-width: 100%;
    width: 100%;
    height: 300px;
    min-height: 200px;
}

/* Video Overlay */
.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Ensure it covers the entire area exactly */
    box-sizing: border-box;
    width: 100%;
    height: 100%;
}

.video-overlay.hidden {
    display: none;
}

.video-overlay #video-section {
    width: 100%;
    height: 100%;
    max-width: none;
    max-height: none;
    border: none;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}



/* Gesture Corner Tab */
.gesture-corner-tab {
    position: absolute;
    top: 0;
    right: 0;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    border: none;
    color: white;
    font-size: 1.2rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    z-index: 15;
    border-radius: 0 var(--border-radius) 0 var(--border-radius);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 2.5rem;
    min-height: 2.5rem;
}

.gesture-corner-tab:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 191, 255, 0.4);
    background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
}

.gesture-corner-tab:active {
    transform: scale(0.95);
}

.gesture-corner-tab.attention-pulse {
    animation: attentionPulse 2s ease-in-out infinite alternate;
}

/* Play Corner Tab (Top Left) */
.play-corner-tab {
    position: absolute;
    top: 0;
    left: 0;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
    border: none;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    z-index: 15;
    border-radius: var(--border-radius) 0 var(--border-radius) 0;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 3rem;
    min-height: 2.5rem;
}

.play-corner-tab:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 255, 65, 0.4);
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
}

.play-corner-tab:active {
    transform: scale(0.95);
}

/* Play button state when playing (stop mode) */
.play-corner-tab.playing {
    background: linear-gradient(135deg, var(--accent-red), #cc0000);
}

.play-corner-tab.playing:hover {
    background: linear-gradient(135deg, #cc0000, var(--accent-red));
    box-shadow: 0 4px 12px rgba(255, 68, 68, 0.4);
}

/* Volume Center Tab (Top Center) */
.volume-center-tab {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    border: none;
    padding: 0.5rem 1rem;
    z-index: 15;
    border-radius: 0 0 1.5rem 1.5rem;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.volume-center-tab:hover {
    background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
    transform: translateX(-50%) translateY(2px);
    box-shadow: 0 6px 16px rgba(0, 191, 255, 0.4);
}

.volume-center-tab .volume-control {
    color: white;
    font-weight: 600;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
}

/* Legacy play-overlay styles - kept for potential future use */
.play-overlay {
    display: none;
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.volume-control input[type="range"] {
    width: 80px;
}

.display-controls {
    display: flex;
    gap: 2rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.display-controls label {
    flex: 1;
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    min-width: 60px;
}

.btn:hover {
    background: var(--border-color);
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
    border: none;
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 255, 65, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, var(--accent-red), #cc0000);
    border: none;
    color: white;
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 68, 68, 0.3);
}

.btn-add {
    background: var(--accent-orange);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--border-radius);
}

.btn-add:hover {
    background: #ff7700;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 140, 0, 0.3);
}

/* Modulation Controls */
.modulation-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
    overflow: hidden;
}

.control-section.collapsed .modulation-grid {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.mod-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mod-group label:first-child {
    flex-direction: row;
    font-weight: 600;
    color: var(--accent-blue);
}

.mod-group input[type="checkbox"] {
    margin-right: 0.5rem;
    accent-color: var(--accent-blue);
}

/* Bottom Bar - Harmonics */
.bottom-bar {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow-soft);
}

.harmonics-section {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.harmonics-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 120px;
}

.harmonics-title {
    color: var(--accent-green);
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.harmonics-title:hover {
    color: var(--accent-blue);
}

.harmonics-section.collapsed .harmonics-container {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.harmonics-container {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    flex: 1;
    min-height: 120px;
    overflow-x: auto;
    padding: 0.5rem;
    transition: all 0.3s ease;
    overflow: hidden;
}

.harmonic-control {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    min-width: 200px;
    flex-shrink: 0;
    position: relative;
    transition: var(--transition);
}

.harmonic-control:hover {
    border-color: var(--accent-green);
    box-shadow: 0 2px 8px rgba(0, 255, 65, 0.2);
}

.harmonic-control > span:first-child {
    position: absolute;
    top: -8px;
    left: 1rem;
    background: var(--accent-green);
    color: var(--bg-primary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-small);
    font-size: 0.75rem;
    font-weight: 600;
}

.delete-btn {
    position: absolute;
    top: -0.5rem;
    right: 0.5rem;
    background: var(--accent-red);
    border: none;
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.delete-btn:hover {
    background: #cc0000;
    transform: scale(1.1);
}

.harmonic-control > div {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 0.5rem;
}

/* Toaster Notifications */
.toaster {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    min-width: 300px;
    box-shadow: var(--shadow);
    animation: slideIn 0.3s ease forwards;
    position: relative;
}

.toast.success {
    border-left: 4px solid var(--accent-green);
}

.toast.error {
    border-left: 4px solid var(--accent-red);
}

.toast.warning {
    border-left: 4px solid var(--accent-orange);
}

.toast.info {
    border-left: 4px solid var(--accent-blue);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 1200px) {
    .header-content {
        grid-template-columns: 1fr 240px 1fr;
        gap: 1.5rem;
    }
    
    .main-layout {
        grid-template-columns: 250px 1fr 250px;
    }
}

@media (max-width: 992px) {
    .top-bar > h1 {
        position: static;
        margin: 0 0 1rem 0 !important;
    }
    
    .header-section {
        padding-top: 0;
    }
    
    .header-content {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-top: 1rem;
    }
    
    .presets-section {
        background: var(--bg-secondary);
        border: 1px solid var(--border-color);
        padding: 1.5rem;
    }
    
    .main-layout {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto;
    }
    
    .left-sidebar,
    .right-sidebar {
        order: 2;
    }
    
    .center-content {
        order: 1;
        min-height: 300px;
    }
    
    .harmonics-section {
        flex-direction: column;
    }
    
    .harmonics-container {
        overflow-x: auto;
        flex-wrap: nowrap;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0.5rem;
        gap: 0.5rem;
    }
    
    .top-bar {
        padding: 1rem;
    }
    
    .top-bar > h1 {
        margin: 0 !important;
        font-size: 1.2rem !important;
    }
    
    /* Enable collapse behavior only on mobile */
    .top-bar.collapsed {
        padding: 0.75rem;
    }
    
    .top-bar.collapsed .header-content {
        max-height: 0;
        opacity: 0;
        margin: 0;
        padding: 0;
        overflow: hidden;
    }
    
    .header-toggle {
        display: inline-block !important;
        position: absolute;
        right: 6px;
        top: 16px;
    }
    
    .header-content {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        margin-top: 1rem;
        transition: all 0.3s ease;
        overflow: hidden;
    }
    
    .header-section {
        order: 1;
    }
    
    .presets-section {
        order: 3;
        width: 100%;
        padding: 0;
        background: no-repeat;
        border: none;
        flex-direction: column;
        gap: 1rem;
    }
    
    .presets-column,
    .melody-column {
        flex: none;
        width: 100%;
    }
    
    .melody-controls {
        flex-direction: row;
        justify-content: space-between;
    }
    
    #waveformCanvas {
        height: 250px;
        min-height: 200px;
    }
    
    .main-layout {
        gap: 0.5rem;
    }

    .mod-group {
        padding: 0;
        background: none;
        border: none;
    }

    .mod-group .slider-label {
        margin-left: 0;
    }

    .left-sidebar,
    .right-sidebar {
        padding: 1rem;
    }
    
    .container {
        min-height: unset;
    }

    .controls-grid {
        gap: 1rem;
    }
    
    .collapsed h3{
        margin-bottom: 0;
    }

    .collapsed button#addHarmonic {
        display: none;
    }

    .display-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    /* Legacy play-overlay mobile styles - no longer needed */
    
    .gesture-corner-tab {
        font-size: 1rem;
        padding: 0.4rem 0.6rem;
        min-width: 2rem;
        min-height: 2rem;
    }
    
    .play-corner-tab {
        font-size: 0.8rem;
        padding: 0.4rem 0.6rem;
        min-width: 2.5rem;
        min-height: 2rem;
    }
    
    .volume-center-tab {
        padding: 0.4rem 0.8rem;
    }
    
    .volume-center-tab .volume-control {
        font-size: 0.8rem;
        gap: 0.3rem;
        flex-direction: row;
    }
    
    .volume-center-tab input[type="range"] {
        width: 80px;
    }
    
    .section-toggle {
        display: inline-flex;
    }

    .volume-control {
        align-items: center;
        gap: 0.25rem;
    }
    
    .volume-control input[type="range"] {
        width: 100px;
    }
    
    .harmonics-sidebar {
        flex-direction: row;
        justify-content: space-between;
        width: 100%;
    }

    .mod-group label:first-child {
        flex-direction: row;
        width: 100%;
        margin-bottom: -0.5rem;
        margin-top: 0.5rem;
    }

    .harmonics-container {
        flex-direction: column;
        width: 100%;
        min-height: unset;
        align-items: stretch;
        padding: 0.5rem 0;
    }
    
    .harmonic-control {
        min-width: unset;
        width: 100%;
        padding: 0.6rem;
    }
    
    .toaster {
        top: 1rem;
        right: 1rem;
        left: 1rem;
    }
    
    .toast {
        min-width: unset;
    }

    .video-controls {
        padding: 0.25rem;
        min-height: 50px;
    }
    
    .video-control-btn {
        padding: 0.5rem;
        font-size: 1.2rem;
        min-width: 64px;
        min-height: 64px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0.25rem;
    }
    
    .top-bar {
        padding: 0.75rem;
    }
    
    .header-section h1 {
        font-size: 1.4rem;
    }
    
    .left-sidebar,
    .right-sidebar {
        padding: 0.75rem;
    }
    
    .bottom-bar {
        padding: 0.75rem;
    }
    
    .harmonics-section {
        gap: 0.75rem;
    }
    
    #waveformCanvas {
        height: 200px;
        min-height: 180px;
    }
    
    .btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .preset-row {
        /* grid-template-columns: 1fr; */
        gap: 0.25rem;
    }
    
    .preset-row:first-child,
    .preset-row:last-child {
        grid-template-columns: 1fr auto;
    }
}

/* Animation for smooth interactions */
@media (prefers-reduced-motion: no-preference) {
    .harmonic-control,
    .mod-group,
    .btn,
    input[type="range"]::-webkit-slider-thumb {
        transition: var(--transition);
    }
}

/* Focus styles for accessibility */
button:focus,
input:focus,
select:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #808080;
        --text-secondary: #c0c0c0;
        --grid-color: #606060;
    }
}

/* Print styles */
@media print {
    .video-play-overlay,
    .play-overlay,
    .toaster {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}