/* ============================================
   FUNKYBEATS - FL Studio Clone Theme
   Phase 2: 3 new synths, EQ, sends, samples, glide
   Phase 3: Arrangement, Drag-to-Paint, Piano Roll
            Copy/Paste, Humanize, Help Modal
   Phase 4: Chorus/Phaser/Flanger/Bitcrusher,
            Bus Routing, Sidechain Source Selection
   ============================================ */

:root {
    --bg-dark: #0a0a14;
    --bg-panel: #12121e;
    --bg-surface: #1a1a2e;
    --bg-elevated: #222240;
    --bg-input: #0d0d1a;
    --accent-orange: #ff6b35;
    --accent-green: #00ff87;
    --accent-blue: #4fc3f7;
    --accent-purple: #bb86fc;
    --accent-red: #ff4757;
    --accent-yellow: #ffd93d;
    --text-primary: #e8e8f0;
    --text-secondary: #8888a0;
    --text-muted: #555570;
    --border: #2a2a45;
    --step-off: #1e1e35;
    --step-on: #ff6b35;
    --step-accent: #ff8c5a;
    --step-ghost: #3a2a20;
    --channel-kick: #ff6b35;
    --channel-snare: #ffd93d;
    --channel-hihat: #4fc3f7;
    --channel-clap: #bb86fc;
    --channel-perc: #ff4757;
    --channel-bass: #00ff87;
    --channel-lead: #ff6bb5;
    --channel-pad: #64ffda;
    --channel-chord: #ff9ff3;
    --channel-stab: #f368e0;
    --channel-organ: #c8d6e5;
    --playhead: #00ff87;
    --radius: 4px;
    --transition: 0.15s ease;
}

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

body {
    font-family: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    user-select: none;
    -webkit-user-select: none;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ---- Header / Transport ---- */
#transport {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 16px;
    background: linear-gradient(180deg, #1a1a30 0%, #12121e 100%);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-right: 8px;
}

.logo-icon {
    font-size: 24px;
    color: var(--accent-orange);
    text-shadow: 0 0 12px rgba(255, 107, 53, 0.5);
}

.logo-text {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.logo-text .accent {
    color: var(--accent-orange);
}

.transport-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.transport-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-primary);
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.transport-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-orange);
}

.transport-btn.active {
    background: var(--accent-green);
    color: #000;
    border-color: var(--accent-green);
    box-shadow: 0 0 12px rgba(0, 255, 135, 0.3);
}

.rec-btn:hover {
    border-color: var(--accent-red);
}

.rec-btn.active {
    background: var(--accent-red);
    border-color: var(--accent-red);
    box-shadow: 0 0 12px rgba(255, 71, 87, 0.4);
    animation: pulse-rec 1s ease infinite;
}

/* ---- Metronome button ---- */
.met-btn {
    font-size: 9px !important;
    font-weight: 700;
    letter-spacing: 0.5px;
    width: auto !important;
    padding: 0 8px !important;
}

.met-btn.active {
    background: var(--accent-yellow) !important;
    color: #000 !important;
    border-color: var(--accent-yellow) !important;
    box-shadow: 0 0 8px rgba(255, 217, 61, 0.4);
}

@keyframes pulse-rec {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.transport-divider {
    width: 1px;
    height: 28px;
    background: var(--border);
}

.bpm-control, .swing-control {
    display: flex;
    align-items: center;
    gap: 6px;
}

.bpm-control label, .swing-control label, .pattern-selector label, .preset-selector label, .steps-control label {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

#bpm {
    width: 56px;
    padding: 4px 6px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--accent-orange);
    font-size: 14px;
    font-weight: 700;
    text-align: center;
    font-family: 'Courier New', monospace;
}

#bpm:focus {
    outline: none;
    border-color: var(--accent-orange);
}

.knob-range {
    width: 70px;
    height: 4px;
}

#swing-val {
    font-size: 11px;
    color: var(--text-secondary);
    min-width: 28px;
}

/* ---- Steps Control ---- */
.steps-control {
    display: flex;
    align-items: center;
    gap: 6px;
}

#steps-select {
    padding: 4px 6px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--accent-orange);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}

#steps-select:focus {
    outline: none;
    border-color: var(--accent-orange);
}

.pattern-selector {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pattern-btns {
    display: flex;
    gap: 4px;
}

.pattern-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
}

.pattern-btn:hover {
    border-color: var(--accent-orange);
}

.pattern-btn.active {
    background: var(--accent-orange);
    color: #000;
    border-color: var(--accent-orange);
}

.transport-right {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

.preset-selector {
    display: flex;
    align-items: center;
    gap: 6px;
}

#preset-select {
    padding: 4px 8px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
}

#preset-select:focus {
    outline: none;
    border-color: var(--accent-orange);
}

.export-btn {
    font-size: 11px !important;
    font-weight: 700;
    letter-spacing: 1px;
    width: auto !important;
    padding: 0 12px;
}

/* ---- Tab Bar ---- */
#tab-bar {
    display: flex;
    gap: 0;
    background: var(--bg-panel);
    border-bottom: 2px solid var(--border);
}

.tab {
    padding: 8px 24px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    cursor: pointer;
    transition: all var(--transition);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

.tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.tab.active {
    color: var(--accent-orange);
    border-bottom-color: var(--accent-orange);
}

/* ---- Visualizer ---- */
#visualizer-bar {
    background: var(--bg-panel);
    padding: 6px 16px;
    border-bottom: 1px solid var(--border);
    position: relative;
}

#visualizer {
    width: 100%;
    height: 60px;
    display: block;
    border-radius: var(--radius);
}

#step-indicators {
    display: flex;
    gap: 4px;
    padding-top: 6px;
    justify-content: center;
}

.step-indicator {
    width: 12px;
    height: 4px;
    border-radius: 2px;
    background: var(--bg-elevated);
    transition: background 0.05s;
    flex-shrink: 0;
}

.step-indicator.active {
    background: var(--accent-green);
    box-shadow: 0 0 6px rgba(0, 255, 135, 0.4);
}

.step-indicator.beat {
    background: var(--accent-orange);
    box-shadow: 0 0 6px rgba(255, 107, 53, 0.4);
}

/* ---- Panels ---- */
#panels {
    flex: 1;
    overflow: auto;
}

.panel {
    display: none;
    padding: 16px;
}

.panel.active {
    display: block;
}

/* ---- Step Sequencer ---- */
.sequencer-grid {
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-x: auto;
}

.seq-row {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px 0;
    border-radius: var(--radius);
    transition: background var(--transition);
}

.seq-row:hover {
    background: rgba(255, 255, 255, 0.02);
}

.seq-channel-info {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 160px;
    padding-right: 8px;
    flex-shrink: 0;
}

.seq-channel-color {
    width: 4px;
    height: 32px;
    border-radius: 2px;
}

.seq-channel-name {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    min-width: 50px;
}

.seq-channel-btns {
    display: flex;
    gap: 3px;
}

.seq-mute, .seq-solo {
    width: 20px;
    height: 20px;
    border: 1px solid var(--border);
    border-radius: 3px;
    background: var(--bg-surface);
    color: var(--text-muted);
    font-size: 9px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.seq-mute:hover, .seq-solo:hover {
    border-color: var(--text-secondary);
}

.seq-mute.active {
    background: var(--accent-red);
    color: #000;
    border-color: var(--accent-red);
}

.seq-solo.active {
    background: var(--accent-yellow);
    color: #000;
    border-color: var(--accent-yellow);
}

.seq-steps {
    display: flex;
    gap: 3px;
    flex: 1;
}

.seq-step-group {
    display: flex;
    gap: 3px;
}

.seq-step-group + .seq-step-group {
    margin-left: 6px;
}

.seq-step {
    width: 40px;
    height: 32px;
    border: 1px solid var(--border);
    border-radius: 3px;
    background: var(--step-off);
    cursor: pointer;
    transition: all 0.08s ease;
    position: relative;
    flex-shrink: 0;
}

.seq-step:hover {
    border-color: var(--text-secondary);
    background: #252540;
}

.seq-step.on {
    border-color: transparent;
}

.seq-step.on .step-fill {
    position: absolute;
    inset: 0;
    border-radius: 2px;
    opacity: 0.9;
}

.seq-step.playing {
    box-shadow: 0 0 8px rgba(0, 255, 135, 0.5);
    border-color: var(--accent-green) !important;
}

.seq-step .velocity-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 0 0 2px 2px;
}

.seq-step.synth-note {
    font-size: 8px;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* ---- Piano Roll ---- */
.pianoroll-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: var(--bg-surface);
    border-radius: var(--radius);
    margin-bottom: 8px;
}

.pianoroll-toolbar label {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 600;
}

.pianoroll-toolbar select {
    padding: 4px 8px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 12px;
}

.pianoroll-divider {
    width: 1px;
    height: 20px;
    background: var(--border);
}

.small-btn {
    padding: 4px 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
    transition: all var(--transition);
}

.small-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-orange);
}

#octave-display {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-orange);
    min-width: 16px;
    text-align: center;
}

.pianoroll-container {
    display: flex;
    background: var(--bg-surface);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.piano-keys {
    display: flex;
    flex-direction: column;
    width: 48px;
    flex-shrink: 0;
    background: var(--bg-panel);
    border-right: 2px solid var(--border);
}

.piano-key {
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 6px;
    font-size: 9px;
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.piano-key.white {
    background: #2a2a40;
    color: var(--text-secondary);
}

.piano-key.black {
    background: #151525;
    color: var(--text-muted);
}

.piano-key.c-note {
    color: var(--accent-orange);
    border-bottom: 1px solid var(--border);
}

.piano-key.vel-label {
    height: 60px;
    font-size: 10px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1px;
    justify-content: center;
    padding-right: 0;
    background: var(--bg-panel);
    border-top: 2px solid var(--border);
}

#pianoroll-canvas {
    cursor: crosshair;
    min-height: 540px;
    height: 540px;
    display: block;
}

.pianoroll-canvas-wrapper {
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
}

/* ---- Mixer ---- */
.mixer-channels {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 8px 0;
}

.mixer-channel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    min-width: 80px;
    transition: border-color var(--transition);
}

.mixer-channel:hover {
    border-color: var(--text-muted);
}

.mixer-channel.master {
    border-color: var(--accent-orange);
    min-width: 100px;
}

/* Phase 4: Bus channel strips */
.mixer-channel.bus-channel {
    min-width: 90px;
    background: linear-gradient(180deg, var(--bg-surface) 0%, #161630 100%);
    border-width: 2px;
    border-style: solid;
}

.mixer-channel-name {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    text-align: center;
}

.mixer-color-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.mixer-vu {
    width: 8px;
    height: 120px;
    background: var(--bg-input);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.mixer-vu-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, var(--accent-green), var(--accent-yellow), var(--accent-red));
    transition: height 0.08s;
    border-radius: 4px;
}

.mixer-fader-container {
    position: relative;
    height: 140px;
    width: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mixer-fader {
    -webkit-appearance: none;
    appearance: none;
    width: 120px;
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
    outline: none;
    transform: rotate(-90deg);
    transform-origin: center;
}

.mixer-fader::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 22px;
    background: linear-gradient(180deg, #555, #333);
    border: 1px solid #666;
    border-radius: 3px;
    cursor: pointer;
}

.mixer-fader::-moz-range-thumb {
    width: 14px;
    height: 22px;
    background: linear-gradient(180deg, #555, #333);
    border: 1px solid #666;
    border-radius: 3px;
    cursor: pointer;
}

.mixer-db {
    font-size: 10px;
    color: var(--text-muted);
    font-family: 'Courier New', monospace;
}

.mixer-pan-container {
    display: flex;
    align-items: center;
    gap: 4px;
}

.mixer-pan-container label {
    font-size: 9px;
    color: var(--text-muted);
}

.mixer-pan {
    width: 50px;
    height: 4px;
}

.mixer-btns {
    display: flex;
    gap: 4px;
}

.mixer-mute, .mixer-solo {
    width: 24px;
    height: 20px;
    border: 1px solid var(--border);
    border-radius: 3px;
    background: var(--bg-input);
    color: var(--text-muted);
    font-size: 9px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
}

.mixer-mute.active {
    background: var(--accent-red);
    color: #000;
    border-color: var(--accent-red);
}

.mixer-solo.active {
    background: var(--accent-yellow);
    color: #000;
    border-color: var(--accent-yellow);
}

/* ---- Mixer EQ Knobs ---- */
.mixer-eq-section {
    display: flex;
    gap: 4px;
    align-items: center;
    margin-top: 4px;
}

.mixer-eq-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.mixer-eq-group label {
    font-size: 7px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}

.mixer-eq-range {
    -webkit-appearance: none;
    appearance: none;
    width: 40px;
    height: 3px;
    background: var(--bg-input);
    border-radius: 2px;
    outline: none;
}

.mixer-eq-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 8px;
    height: 8px;
    background: var(--accent-blue);
    border-radius: 50%;
    cursor: pointer;
}

.mixer-eq-range::-moz-range-thumb {
    width: 8px;
    height: 8px;
    background: var(--accent-blue);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* ---- Mixer Send Knobs ---- */
.mixer-send-section {
    display: flex;
    gap: 4px;
    align-items: center;
    margin-top: 4px;
}

.mixer-send-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.mixer-send-group label {
    font-size: 7px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}

.mixer-send-range {
    -webkit-appearance: none;
    appearance: none;
    width: 40px;
    height: 3px;
    background: var(--bg-input);
    border-radius: 2px;
    outline: none;
}

.mixer-send-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 8px;
    height: 8px;
    background: var(--accent-purple);
    border-radius: 50%;
    cursor: pointer;
}

.mixer-send-range::-moz-range-thumb {
    width: 8px;
    height: 8px;
    background: var(--accent-purple);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* ---- Effects Rack ---- */
#effects-rack {
    padding: 10px 16px;
    background: var(--bg-panel);
    border-top: 1px solid var(--border);
}

#effects-rack h3 {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.effects-grid {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.effect-unit {
    display: flex;
    align-items: center;
    gap: 8px;
}

.effect-label {
    font-size: 9px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    min-width: 65px;
}

.fx-range {
    width: 80px;
    height: 4px;
}

.fx-val {
    font-size: 10px;
    color: var(--text-secondary);
    min-width: 36px;
    font-family: 'Courier New', monospace;
}

/* ---- Range Input Styling ---- */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--bg-input);
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--accent-orange);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 4px rgba(255, 107, 53, 0.3);
}

input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--accent-orange);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

input[type="range"]:hover::-webkit-slider-thumb {
    box-shadow: 0 0 8px rgba(255, 107, 53, 0.5);
}

/* ---- Status Bar ---- */
#status-bar {
    display: flex;
    justify-content: space-between;
    padding: 4px 16px;
    background: var(--bg-panel);
    border-top: 1px solid var(--border);
    font-size: 10px;
    color: var(--text-muted);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
    .seq-step {
        width: 28px;
        height: 28px;
    }

    .seq-channel-info {
        min-width: 100px;
    }

    .seq-step-group + .seq-step-group {
        margin-left: 3px;
    }

    .seq-channel-btns {
        display: none;
    }
}

/* ---- Animations ---- */
@keyframes glow-green {
    0%, 100% { box-shadow: 0 0 4px rgba(0, 255, 135, 0.2); }
    50% { box-shadow: 0 0 12px rgba(0, 255, 135, 0.5); }
}

@keyframes glow-orange {
    0%, 100% { box-shadow: 0 0 4px rgba(255, 107, 53, 0.2); }
    50% { box-shadow: 0 0 12px rgba(255, 107, 53, 0.5); }
}

.seq-step.on:hover {
    filter: brightness(1.2);
}

/* ---- Open HiHat indicator ---- */
.seq-step.open-hat {
    border: 2px solid var(--accent-blue) !important;
    box-shadow: 0 0 6px rgba(79, 195, 247, 0.4);
}

.seq-step.open-hat::after {
    content: 'O';
    position: absolute;
    top: 1px;
    right: 2px;
    font-size: 7px;
    color: var(--accent-blue);
    font-weight: 700;
    pointer-events: none;
}

/* ---- Tap Tempo ---- */
.tap-btn {
    font-size: 9px !important;
    font-weight: 700;
    letter-spacing: 0.5px;
    width: auto !important;
    padding: 0 8px !important;
}

.tap-btn.active {
    background: var(--accent-orange) !important;
    color: #000 !important;
}

/* ---- Mode Toggle ---- */
.mode-control {
    display: flex;
    align-items: center;
    gap: 6px;
}

.mode-control label {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.mode-btns {
    display: flex;
    gap: 2px;
}

.mode-btn {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 9px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.5px;
}

.mode-btn:hover {
    border-color: var(--accent-orange);
}

.mode-btn.active {
    background: var(--accent-blue);
    color: #000;
    border-color: var(--accent-blue);
}

/* ---- Pattern Tools ---- */
.pattern-tools {
    display: flex;
    gap: 3px;
    margin-left: 6px;
}

.tool-btn {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 9px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.5px;
}

.tool-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-orange);
    color: var(--text-primary);
}

.tool-btn:active {
    background: var(--accent-orange);
    color: #000;
}

/* ---- Save Tools ---- */
.save-tools {
    display: flex;
    gap: 4px;
}

/* ---- Synth Editor ---- */
.synth-editor {
    padding: 8px 0;
}

.synth-channel-selector {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    background: var(--bg-surface);
    border-radius: var(--radius);
    margin-bottom: 12px;
}

.synth-channel-selector label {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.synth-channel-btns {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.synth-ch-btn {
    padding: 5px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-input);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
}

.synth-ch-btn:hover {
    border-color: var(--text-secondary);
}

.synth-ch-btn.active {
    border-color: var(--accent-orange);
    color: var(--text-primary);
    background: var(--bg-elevated);
}

/* ---- Sample Section in Synth Editor ---- */
.synth-sample-section {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--bg-surface);
    border-radius: 6px;
    border: 1px solid var(--border);
    margin-bottom: 12px;
    min-height: 44px;
}

.synth-sample-section .sample-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-secondary);
    min-width: 50px;
}

.synth-sample-section .sample-name {
    font-size: 11px;
    color: var(--text-muted);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.synth-sample-section .sample-name.loaded {
    color: var(--accent-green);
}

.synth-params {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 16px;
    background: var(--bg-surface);
    border-radius: 6px;
    border: 1px solid var(--border);
    min-height: 100px;
    margin-bottom: 12px;
}

.synth-param-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    min-width: 80px;
}

.synth-param-group label {
    font-size: 9px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    text-align: center;
}

.synth-range {
    width: 90px;
    height: 4px;
}

.synth-select {
    padding: 3px 6px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--accent-orange);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
}

.synth-select:focus {
    outline: none;
    border-color: var(--accent-orange);
}

.param-val {
    font-size: 10px;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    min-width: 36px;
    text-align: center;
}

/* ---- Sidechain Section ---- */
.sidechain-section {
    padding: 12px 16px;
    background: var(--bg-surface);
    border-radius: 6px;
    border: 1px solid var(--border);
}

.sidechain-section h4 {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.sidechain-controls {
    display: flex;
    gap: 24px;
}

/* ---- Automation Editor ---- */
.automation-editor {
    padding: 8px 0;
}

.automation-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: var(--bg-surface);
    border-radius: var(--radius);
    margin-bottom: 8px;
}

.automation-toolbar label {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 600;
}

.automation-toolbar select {
    padding: 4px 8px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 12px;
}

.automation-canvas-container {
    background: var(--bg-surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
}

#automation-canvas {
    display: block;
    width: 100%;
    height: 200px;
    cursor: crosshair;
}

/* ---- Song Mode ---- */
.song-editor {
    padding: 8px 0;
}

.song-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: var(--bg-surface);
    border-radius: var(--radius);
    margin-bottom: 12px;
}

.song-toolbar label {
    font-size: 11px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
}

.song-toolbar input[type="checkbox"] {
    accent-color: var(--accent-orange);
}

.song-info {
    font-size: 11px;
    color: var(--text-muted);
    margin-left: auto;
}

/* ---- Arrangement Palette ---- */
.arrangement-palette {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    background: var(--bg-surface);
    border-radius: var(--radius);
    margin-bottom: 8px;
}

.arr-palette-label {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 1px;
    margin-right: 6px;
}

.arr-pat-btn {
    width: 32px;
    height: 28px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-input);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 800;
    cursor: pointer;
    transition: all var(--transition);
    font-family: 'Courier New', monospace;
}

.arr-pat-btn:hover {
    border-color: var(--accent-orange);
}

.arr-pat-btn.active {
    background: var(--accent-orange);
    color: #000;
    border-color: var(--accent-orange);
    box-shadow: 0 0 6px rgba(255, 107, 53, 0.3);
}

.arr-pat-btn[data-pattern="0"] { border-color: #ff6b35; }
.arr-pat-btn[data-pattern="1"] { border-color: #ffd93d; }
.arr-pat-btn[data-pattern="2"] { border-color: #4fc3f7; }
.arr-pat-btn[data-pattern="3"] { border-color: #bb86fc; }
.arr-pat-btn[data-pattern="4"] { border-color: #ff4757; }
.arr-pat-btn[data-pattern="5"] { border-color: #00ff87; }
.arr-pat-btn[data-pattern="6"] { border-color: #ff6bb5; }
.arr-pat-btn[data-pattern="7"] { border-color: #64ffda; }

.arr-pat-btn.active[data-pattern="0"] { background: #ff6b35; }
.arr-pat-btn.active[data-pattern="1"] { background: #ffd93d; color: #000; }
.arr-pat-btn.active[data-pattern="2"] { background: #4fc3f7; color: #000; }
.arr-pat-btn.active[data-pattern="3"] { background: #bb86fc; color: #000; }
.arr-pat-btn.active[data-pattern="4"] { background: #ff4757; }
.arr-pat-btn.active[data-pattern="5"] { background: #00ff87; color: #000; }
.arr-pat-btn.active[data-pattern="6"] { background: #ff6bb5; }
.arr-pat-btn.active[data-pattern="7"] { background: #64ffda; color: #000; }

.arrangement-canvas-container {
    background: var(--bg-surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
}

#arrangement-canvas {
    display: block;
    width: 100%;
    height: 120px;
    cursor: crosshair;
}

.song-help {
    margin-top: 8px;
    font-size: 11px;
    color: var(--text-muted);
}

/* ---- Keyboard Hint ---- */
.keyboard-hint {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}

/* ---- Undo flash ---- */
.undo-flash {
    animation: flash-green 0.3s ease;
}

@keyframes flash-green {
    0% { background: rgba(0, 255, 135, 0.2); }
    100% { background: transparent; }
}

/* ---- Phase 3: SEL button active state ---- */
.small-btn.active {
    background: var(--accent-blue);
    color: #000;
    border-color: var(--accent-blue);
    box-shadow: 0 0 6px rgba(79, 195, 247, 0.4);
}

/* ---- Phase 3: Status bar help button ---- */
.status-help-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
    vertical-align: middle;
    margin-right: 6px;
    padding: 0;
    line-height: 1;
}

.status-help-btn:hover {
    background: var(--accent-orange);
    color: #000;
    border-color: var(--accent-orange);
}

/* ---- Phase 3: Help Modal ---- */
.help-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.help-modal-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 36px;
    max-width: 520px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.help-modal-title {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: var(--accent-orange);
    margin-bottom: 20px;
    text-align: center;
}

.help-section-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin-top: 16px;
    margin-bottom: 8px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    padding-bottom: 4px;
}

.help-shortcut-grid {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 4px 12px;
    margin-bottom: 4px;
}

.help-key {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-orange);
    font-family: 'Courier New', monospace;
    padding: 2px 6px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 3px;
    text-align: center;
}

.help-desc {
    font-size: 12px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
}

.help-close-btn {
    display: block;
    margin: 20px auto 0;
    padding: 8px 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
}

.help-close-btn:hover {
    background: var(--accent-orange);
    color: #000;
    border-color: var(--accent-orange);
}

/* ---- Phase 3: Drag-to-paint cursor ---- */
.seq-step {
    touch-action: none;
}

/* ---- Phase 5: Context Menu ---- */
.context-menu {
    position: fixed;
    z-index: 2000;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 0;
    min-width: 180px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
}

.context-menu-item {
    display: block;
    width: 100%;
    padding: 6px 16px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 12px;
    text-align: left;
    cursor: pointer;
    transition: background var(--transition);
}

.context-menu-item:hover {
    background: var(--bg-elevated);
    color: var(--accent-orange);
}

.context-menu-item.disabled {
    color: var(--text-muted);
    cursor: default;
    pointer-events: none;
}

.context-menu-separator {
    height: 1px;
    background: var(--border);
    margin: 4px 8px;
}

/* ---- Phase 5: Undo/Redo Buttons ---- */
.undo-redo-btns {
    display: flex;
    gap: 2px;
}

.undo-redo-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.undo-redo-btn:hover:not(.disabled) {
    background: var(--bg-elevated);
    border-color: var(--accent-orange);
}

.undo-redo-btn.disabled {
    color: var(--text-muted);
    opacity: 0.4;
    cursor: default;
}

/* ---- Phase 5: Preset Browser Modal ---- */
.preset-browser-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1500;
}

.preset-browser-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px 28px;
    max-width: 700px;
    width: 90%;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.preset-browser-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.preset-browser-title {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: var(--accent-orange);
}

.preset-browser-close {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.preset-browser-close:hover {
    background: var(--accent-red);
    color: #000;
    border-color: var(--accent-red);
}

.preset-browser-search {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 13px;
    margin-bottom: 12px;
    outline: none;
}

.preset-browser-search:focus {
    border-color: var(--accent-orange);
}

.preset-browser-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 12px;
}

.preset-tag-btn {
    padding: 3px 10px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.3px;
}

.preset-tag-btn:hover {
    border-color: var(--accent-orange);
    color: var(--text-primary);
}

.preset-tag-btn.active {
    background: var(--accent-orange);
    color: #000;
    border-color: var(--accent-orange);
}

.preset-browser-list {
    flex: 1;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-input);
}

.preset-browser-section-title {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    padding: 8px 12px 4px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
    position: sticky;
    top: 0;
    z-index: 1;
}

.preset-browser-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 8px 12px;
    cursor: pointer;
    transition: background var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.preset-browser-item:hover {
    background: var(--bg-elevated);
}

.preset-browser-item-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.preset-browser-item-name {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
}

.preset-browser-item-artist {
    font-size: 10px;
    color: var(--accent-orange);
    font-weight: 600;
}

.preset-browser-item-desc {
    font-size: 11px;
    color: var(--text-muted);
}

.preset-browser-item-tags {
    display: flex;
    gap: 4px;
    margin-top: 2px;
}

.preset-item-tag {
    padding: 1px 6px;
    border-radius: 8px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    font-size: 9px;
    color: var(--text-muted);
}

.preset-browser-footer {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    align-items: center;
}

.preset-save-input {
    flex: 1;
    padding: 6px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 12px;
    outline: none;
}

.preset-save-input:focus {
    border-color: var(--accent-orange);
}

.preset-save-btn {
    padding: 6px 14px;
    border: 1px solid var(--accent-green);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--accent-green);
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
}

.preset-save-btn:hover {
    background: var(--accent-green);
    color: #000;
}

.preset-browse-btn {
    font-size: 9px !important;
    font-weight: 700;
    letter-spacing: 0.5px;
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.preset-browse-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-orange);
    color: var(--text-primary);
}

/* ---- Phase 5: Piano Roll Zoom ---- */
.pianoroll-zoom-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.pianoroll-zoom-controls .small-btn {
    width: 24px;
    height: 24px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
}

.pianoroll-zoom-display {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-orange);
    min-width: 36px;
    text-align: center;
    font-family: 'Courier New', monospace;
}

.pianoroll-canvas-wrapper {
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    position: relative;
}

/* ---- Phase 5: MIDI Indicator ---- */
.midi-indicator {
    font-size: 10px;
    color: var(--text-muted);
    margin-right: 8px;
}

.midi-indicator.connected {
    color: var(--accent-green);
}

/* ---- Phase 5: WAV Export Progress ---- */
.export-progress {
    color: var(--accent-orange);
    font-weight: 600;
}

/* ============================================
   Phase 6: Mobile Optimization
   Samsung Galaxy S24 Ultra (412x915 CSS px)
   ============================================ */

/* ---- Hamburger Button (hidden on desktop, shown at 480px) ---- */
.hamburger-btn {
    display: none;
    font-size: 20px !important;
    width: auto !important;
    padding: 0 10px !important;
}

/* ---- Mobile Drawer ---- */
.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-panel);
    z-index: 1000;
    padding: 16px;
    border-bottom: 2px solid var(--accent-orange);
    display: flex;
    flex-direction: column;
    gap: 12px;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}
.mobile-drawer.open {
    transform: translateY(0);
}
.mobile-drawer .drawer-section {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}
.mobile-drawer .drawer-section-label {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 1px;
    width: 100%;
}
.mobile-drawer .drawer-close {
    position: absolute;
    top: 8px;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
}
.mobile-drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
}
.mobile-drawer-overlay.hidden {
    display: none;
}

/* ---- Mobile Piano Keyboard ---- */
.mobile-piano {
    position: fixed;
    bottom: 52px;
    left: 0;
    right: 0;
    height: 100px;
    background: var(--bg-panel);
    border-top: 1px solid var(--border);
    z-index: 850;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
}
.mobile-piano.hidden {
    display: none;
}
.mobile-piano-key {
    flex: 1;
    height: 80px;
    background: #2a2a40;
    border: 1px solid var(--border);
    border-radius: 0 0 4px 4px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 4px;
    font-size: 9px;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.mobile-piano-key:active {
    background: var(--accent-orange);
    color: #000;
}
.mobile-piano-key.black {
    height: 55px;
    background: #111;
    margin: 0 -6px;
    z-index: 1;
    flex: 0 0 28px;
    border-radius: 0 0 3px 3px;
}
.mobile-piano-key.black:active {
    background: var(--accent-orange);
}
.mobile-piano-octave-btn {
    width: 32px;
    height: 80px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* ---- Floating Play Button ---- */
.fab-play {
    position: fixed;
    bottom: 64px;
    right: 16px;
    z-index: 800;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent-green);
    color: #000;
    border: none;
    font-size: 22px;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(0,255,135,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.fab-play.playing {
    background: var(--accent-red);
}
.fab-play:active {
    transform: scale(0.9);
}

/* ---- Desktop: Hide mobile-only elements ---- */
@media (min-width: 769px) {
    .fab-play { display: none; }
    .mobile-piano { display: none !important; }
    .hamburger-btn { display: none; }
    .mobile-drawer { display: none !important; }
    .mobile-drawer-overlay { display: none !important; }
}

/* ============================================
   Tablet / Large Phone (max-width: 768px)
   ============================================ */
@media (max-width: 768px) {
    /* Tab bar -> fixed bottom */
    #tab-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 900;
        border-top: 2px solid var(--border);
        border-bottom: none;
        background: var(--bg-panel);
    }
    .tab {
        padding: 10px 4px;
        font-size: 0;
        flex: 1;
        text-align: center;
        min-height: 48px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .tab::after {
        font-size: 10px;
        letter-spacing: 0.5px;
        font-weight: 700;
    }
    .tab[data-short="SEQ"]::after { content: "SEQ"; }
    .tab[data-short="PIANO"]::after { content: "PIANO"; }
    .tab[data-short="MIX"]::after { content: "MIX"; }
    .tab[data-short="SYNTH"]::after { content: "SYNTH"; }
    .tab[data-short="AUTO"]::after { content: "AUTO"; }
    .tab[data-short="SONG"]::after { content: "SONG"; }
    #app {
        padding-bottom: 52px;
    }

    /* Transport collapse */
    .transport-divider { display: none; }
    .transport-controls, .transport-right {
        flex-wrap: wrap;
        width: 100%;
        gap: 6px;
    }
    .transport-right {
        margin-left: 0;
        margin-top: 4px;
    }

    /* Effects rack 2-column */
    .effects-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    .effect-unit { width: 100%; }

    /* Visualizer shrink */
    #visualizer { height: 40px; }
    #step-indicators { display: none; }

    /* Touch targets */
    input[type="range"]::-webkit-slider-thumb { width: 24px; height: 24px; }
    input[type="range"]::-moz-range-thumb { width: 24px; height: 24px; }
    .small-btn { min-height: 36px; min-width: 36px; padding: 6px 10px; }

    /* Status bar simplify */
    #status-right { font-size: 0; }
    #status-right .midi-indicator,
    #status-right .status-help-btn { font-size: 10px; }

    /* Piano roll adjustments */
    .pianoroll-toolbar { flex-wrap: wrap; gap: 6px; }
    .keyboard-hint { display: none; }
    .pianoroll-divider { display: none; }
    .piano-keys { width: 32px; }
    .piano-key { font-size: 7px; height: 18px; }
    #pianoroll-canvas { touch-action: none; }
    #automation-canvas { touch-action: none; }

    /* Sequencer horizontal scroll */
    .seq-steps {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        flex-shrink: 0;
    }
    .seq-channel-info { min-width: 80px; }

    /* Mixer vertical on mobile */
    .mixer-channels {
        flex-direction: column;
        overflow-x: visible;
    }
    .mixer-channel {
        flex-direction: row;
        min-width: 100%;
        padding: 8px 12px;
        gap: 10px;
        align-items: center;
    }
    .mixer-channel.bus-channel { flex-direction: row; }
    .mixer-fader-container { height: auto; width: 100px; }
    .mixer-fader { transform: none; width: 100px; }
    .mixer-vu { width: 60px; height: 8px; }
    .mixer-vu-fill { width: 0%; height: 100%; bottom: auto; left: 0; }

    /* Synth editor wrap */
    .synth-channel-btns { gap: 3px; }
    .synth-ch-btn { padding: 4px 8px; font-size: 10px; min-height: 36px; }
    .synth-params { gap: 10px; padding: 10px; }
    .synth-param-group { min-width: 70px; }
    .synth-range { width: 70px; }
    .sidechain-controls { flex-wrap: wrap; gap: 12px; }

    /* Modals as bottom sheets */
    .preset-browser-overlay .preset-browser-card,
    .help-modal-overlay .help-modal-card {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        max-width: 100%;
        width: 100%;
        border-radius: 16px 16px 0 0;
        max-height: 80vh;
        margin: 0;
    }
    .context-menu { min-width: 200px; }
    .context-menu-item { padding: 12px 16px; font-size: 14px; min-height: 44px; }
}

/* ============================================
   Phone Specific (max-width: 480px)
   ============================================ */
@media (max-width: 480px) {
    .hamburger-btn { display: flex; }
    .logo-text { display: none; }
    .pattern-btns { gap: 2px; }
    .pattern-btn { width: 28px; height: 32px; font-size: 11px; }
    .pattern-tools { display: none; }
    .save-tools { display: none; }
    .preset-selector select { display: none; }
    .preset-selector label { display: none; }
    .transport-btn { min-width: 44px; min-height: 44px; }
    .undo-redo-btn { min-width: 36px; min-height: 36px; }
    .seq-step { width: 32px; height: 36px; }
    .seq-channel-name { font-size: 9px; min-width: 40px; }
    .seq-channel-info { min-width: 60px; gap: 4px; }
    #bpm { width: 48px; }
    .knob-range { width: 50px; }
}