/* CSS per Lowegate Web Audio Lab — Estetica Lowegate Studio (nero + oro) */

:root {
    --bg-base: #080808;
    --bg-panel: rgba(20, 20, 20, 0.62);
    --border-color: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(255, 255, 255, 0.16);

    /* Lowegate accent system — gold primary + muted functional accents.
       The historic --neon-* variable names are kept so the whole stylesheet
       keeps working; only the values change to the Lowegate palette. */
    --neon-cyan:   #E8B84B;   /* primary gold — synth, play, kick, sliders, visualizer */
    --neon-violet: #8fb0c4;   /* muted steel — snare */
    --neon-pink:   #cf7a91;   /* muted rose — hi-hat, active black keys */
    --neon-gold:   #d98c5f;   /* muted terracotta — clap */

    --neon-cyan-glow:   rgba(232, 184, 75, 0.32);
    --neon-violet-glow: rgba(143, 176, 196, 0.30);
    --neon-pink-glow:   rgba(207, 122, 145, 0.30);

    /* Lowegate brand golds (used for the primary identity) */
    --gold:  #C9922A;
    --lgold: #E8B84B;

    /* Text colors */
    --text-main: #f0f0f0;
    --text-muted: #8a8a8a;
    --text-dark: #4a4a4a;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

button, .piano-key, .step-btn, .pianoroll-cell, .pianoroll-note-key, .instrument-trigger, .wave-btn {
    touch-action: manipulation;
}

body {
    background-color: var(--bg-base);
    background-image:
        radial-gradient(at 12% 18%, rgba(201, 146, 42, 0.10) 0px, transparent 55%),
        radial-gradient(at 88% 82%, rgba(232, 184, 75, 0.06) 0px, transparent 55%),
        radial-gradient(at 50% 50%, rgba(255, 255, 255, 0.015) 0px, transparent 60%);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.3);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-dark);
}

/* Audio Start Overlay Screen */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(8, 8, 8, 0.95);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease, visibility 0.5s;
}

.overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    padding: 40px;
    max-width: 500px;
    width: 90%;
}

.glow-logo {
    display: inline-block;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 15px var(--neon-cyan-glow));
    animation: pulse-glow 2.5s infinite alternate;
}

.overlay-content h1 {
    font-family: 'Inter', sans-serif;
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: 4px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--lgold), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 40px rgba(201, 146, 42, 0.25);
}

.overlay-content p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 35px;
    letter-spacing: 1px;
    font-weight: 300;
}

.btn-primary-glow {
    background: linear-gradient(135deg, var(--gold), var(--lgold));
    border: none;
    outline: none;
    color: #080808;
    padding: 16px 40px;
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 0 25px var(--neon-cyan-glow);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.btn-primary-glow:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 35px rgba(232, 184, 75, 0.5);
    background: linear-gradient(135deg, var(--gold), var(--lgold));
}

.btn-primary-glow:active {
    transform: translateY(1px);
}

/* Glassmorphism Panel styles */
.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    transition: border-color var(--transition-normal);
}

.glass-panel:hover {
    border-color: var(--border-hover);
}

/* App Container Layout */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-height: 100vh;
}

/* Header styling */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: rgba(20, 20, 20, 0.4);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-main);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--neon-cyan);
    filter: drop-shadow(0 0 5px var(--neon-cyan-glow));
}

.logo h1 {
    font-family: 'Inter', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo h1 span {
    font-weight: 400;
    color: var(--text-muted);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 24px;
}

.bpm-control-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 150px;
}

.bpm-control-container label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.bpm-control-container label span {
    color: var(--neon-cyan);
    font-weight: 700;
}

/* MIDI Badge styling */
.midi-status-badge {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    color: var(--text-muted);
    transition: all 0.3s;
}

.midi-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ff3b30;
    box-shadow: 0 0 6px rgba(255, 59, 48, 0.4);
    display: inline-block;
    transition: background 0.3s, box-shadow 0.3s;
}

.midi-status-badge.connected {
    color: var(--text-main);
    border-color: rgba(52, 199, 89, 0.3);
    background: rgba(52, 199, 89, 0.05);
}

.midi-status-badge.connected .midi-dot {
    background: #34c759;
    box-shadow: 0 0 8px #34c759;
}

/* Main Workspace */
.app-workspace {
    display: grid;
    grid-template-columns: 1.15fr 1.25fr;
    gap: 20px;
}

@media (max-width: 1024px) {
    .app-workspace {
        grid-template-columns: 1fr;
    }
    .full-width-panel {
        grid-column: auto !important;
    }
}

.full-width-panel {
    grid-column: 1 / span 2;
}

/* ------------------------------------------------------------- */
/* Mobile / small-screen adaptations                             */
/* ------------------------------------------------------------- */
@media (max-width: 720px) {
    .app-container {
        padding: 12px;
        gap: 14px;
    }

    .app-header {
        flex-direction: column;
        align-items: stretch;
        gap: 14px;
        padding: 14px 16px;
    }

    .logo {
        justify-content: center;
    }

    .header-controls {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
        width: 100%;
    }

    .bpm-control-container {
        width: 100%;
        max-width: none;
        order: 3;
    }

    .midi-status-badge {
        font-size: 0.72rem;
    }

    .panel {
        padding: 16px;
        gap: 16px;
    }

    .overlay-content h1 {
        font-size: 2rem;
        letter-spacing: 2px;
    }

    .overlay-content p {
        font-size: 0.95rem;
    }

    .btn-primary-glow {
        padding: 14px 32px;
        font-size: 1rem;
    }

    /* Piano keyboard: slightly shorter to save vertical space on phones */
    .piano-keyboard {
        height: 140px;
    }

    /* Piano Roll: cap visible height lower so it doesn't dominate a phone screen */
    .pianoroll-scroll-container {
        max-height: 320px;
    }
}

/* Panel Header */
.panel {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-width: 0; /* Prevent fixed-width scrollable children (drum grid, piano roll) from stretching this flex/grid item and blowing out the page width */
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    row-gap: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.panel-header h2 {
    font-family: 'Inter', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: 0.5px;
}

.panel-subtitle {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.panel-header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.btn-compact {
    padding: 7px 12px;
    font-size: 0.7rem;
}

.panel-indicator {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    padding: 4px 10px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

/* Synthesizer Module styles */
.synth-controls {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.control-group h3, .control-subgroup h3 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 12px;
}

/* Wave selector buttons */
.wave-selector {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.wave-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 6px;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast) ease-in-out;
}

.wave-icon {
    width: 28px;
    height: 28px;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.wave-btn span {
    font-size: 0.75rem;
    font-weight: 500;
}

.wave-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--text-main);
}

.wave-btn:hover .wave-icon {
    color: var(--text-main);
}

.wave-btn.active {
    background: rgba(201, 146, 42, 0.14);
    border-color: var(--lgold);
    box-shadow: 0 0 15px var(--neon-cyan-glow);
    color: var(--text-main);
}

.wave-btn.active .wave-icon {
    color: var(--neon-cyan);
    filter: drop-shadow(0 0 4px var(--neon-cyan-glow));
}

/* Knobs & sliders layout */
.knobs-row {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 20px;
}

@media (max-width: 580px) {
    .knobs-row {
        grid-template-columns: 1fr;
    }
}

.control-subgroup {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

.sliders-grid {
    display: flex;
    justify-content: space-around;
    gap: 8px;
}

.slider-vertical-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    height: 170px;
}

.slider-vertical-container .slider-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
}

.slider-vertical-container .slider-val {
    font-size: 0.7rem;
    color: var(--neon-pink);
    font-weight: 600;
    font-family: monospace;
}

/* Vertical range input styling.
   Uses genuine vertical orientation (-webkit-appearance:slider-vertical for
   Chrome/Safari/Edge, writing-mode for Firefox) instead of a rotated horizontal
   slider: a CSS-rotated <input type="range"> doesn't reliably register drag/touch
   gestures across browsers, since the rotation transform confuses hit-testing. */
.vertical-slider {
    -webkit-appearance: slider-vertical;
    writing-mode: vertical-lr;
    direction: rtl;
    width: 6px;
    height: 110px;
    background: #1a1a1a;
    outline: none;
    border-radius: 3px;
    cursor: pointer;
}

.vertical-slider::-webkit-slider-runnable-track {
    width: 6px;
    background: #141414;
    border-radius: 3px;
}

.vertical-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--neon-pink);
    box-shadow: 0 0 8px var(--neon-pink-glow);
    cursor: pointer;
    transition: transform 0.1s;
}

.vertical-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.vertical-slider::-moz-range-track {
    width: 6px;
    background: #141414;
    border-radius: 3px;
}

.vertical-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border: none;
    border-radius: 50%;
    background: var(--neon-pink);
    box-shadow: 0 0 8px var(--neon-pink-glow);
    cursor: pointer;
    transition: transform 0.1s;
}

.vertical-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
}

/* Horizontal sliders layout for filters */
.horizontal-layout {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 16px;
    width: 100%;
}

.slider-horizontal-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
}

.slider-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.slider-horizontal-container .slider-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.slider-horizontal-container .slider-val {
    font-size: 0.75rem;
    color: var(--neon-cyan);
    font-weight: 600;
    font-family: monospace;
}

/* Sleek horizontal slider styling */
.sleek-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: #141414;
    outline: none;
    border-radius: 3px;
    cursor: pointer;
}

.sleek-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--neon-cyan);
    box-shadow: 0 0 8px var(--neon-cyan-glow);
    cursor: pointer;
    margin-top: -5px;
    transition: transform var(--transition-fast);
}

.sleek-slider::-webkit-slider-thumb:hover {
    transform: scale(1.25);
}

.sleek-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border: none;
    border-radius: 50%;
    background: var(--neon-cyan);
    box-shadow: 0 0 8px var(--neon-cyan-glow);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.sleek-slider::-moz-range-thumb:hover {
    transform: scale(1.25);
}

/* Instrument preset dropdown */
.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 16px;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--neon-cyan);
    border-bottom: 2px solid var(--neon-cyan);
    transform: translateY(-70%) rotate(45deg);
    pointer-events: none;
}

.sleek-select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 40px 12px 14px;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sleek-select:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
}

.sleek-select:focus {
    outline: none;
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-cyan-glow);
}

.sleek-select option {
    background: #141414;
    color: var(--text-main);
}

/* Piano Keyboard styles */
.keyboard-container {
    position: relative;
    padding-top: 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 10px;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.piano-keyboard {
    display: flex;
    position: relative;
    height: 180px;
    width: 100%;
    border-radius: 6px;
    overflow: hidden;
}

.piano-key {
    cursor: pointer;
    position: relative;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.white-key {
    width: 10%;
    background: linear-gradient(to bottom, #ffffff 0%, #e2e1e9 100%);
    border-right: 1px solid #1a1a1a;
    height: 100%;
    z-index: 1;
    border-radius: 0 0 4px 4px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    padding-bottom: 12px;
}

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

.white-key:hover {
    background: linear-gradient(to bottom, #ffffff 0%, #d5d3e0 100%);
}

.white-key.active {
    background: linear-gradient(to bottom, #E8B84B 0%, #C9922A 100%);
    box-shadow: inset 0 0 12px rgba(255,255,255,0.6), 0 0 15px var(--neon-cyan-glow);
}

.white-key.active .key-note, .white-key.active .key-hint {
    color: #080808;
}

.black-key {
    width: 6%;
    height: 60%;
    background: linear-gradient(to bottom, #1f1f1f 0%, #0a0a0a 100%);
    margin-left: -3%;
    margin-right: -3%;
    z-index: 2;
    border-radius: 0 0 3px 3px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    padding-bottom: 8px;
}

.black-key:hover {
    background: linear-gradient(to bottom, #2a2a2a 0%, #141414 100%);
}

.black-key.active {
    background: linear-gradient(to bottom, #cf7a91 0%, #b3607a 100%);
    box-shadow: inset 0 0 6px rgba(255,255,255,0.6), 0 0 15px var(--neon-pink-glow);
}

.black-key.active .key-hint {
    color: white;
}

.key-hint {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
    font-family: monospace;
}

.black-key .key-hint {
    color: rgba(255, 255, 255, 0.35);
}

.key-note {
    font-size: 0.75rem;
    font-weight: 600;
    color: #7b7891;
    text-transform: uppercase;
    font-family: 'Inter', sans-serif;
}

/* Right Column Panels */
.right-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-width: 0;
}

/* Drum Sequencer Layout */
.sequencer-grid-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 0;
}

.sequencer-header-row {
    display: grid;
    grid-template-columns: 85px 1fr;
    align-items: center;
    gap: 12px;
}

.track-label-header {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}

.steps-indicators {
    display: grid;
    grid-template-columns: repeat(16, 1fr);
    gap: 6px;
    text-align: center;
}

.step-num {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-dark);
    font-family: monospace;
}

.step-num.active-step {
    color: var(--neon-cyan);
    text-shadow: 0 0 4px var(--neon-cyan-glow);
}

.drum-track {
    display: grid;
    grid-template-columns: 85px 1fr;
    align-items: center;
    gap: 12px;
}

.instrument-trigger {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 10px 6px;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
}

.instrument-trigger .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-dark);
    display: inline-block;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

/* Colors for instrument triggers */
.instrument-trigger.kick-color:hover {
    background: rgba(232, 184, 75, 0.1);
    border-color: var(--neon-cyan);
}
.instrument-trigger.kick-color.playing .dot {
    background: var(--neon-cyan);
    box-shadow: 0 0 6px var(--neon-cyan);
}

.instrument-trigger.snare-color:hover {
    background: rgba(126, 168, 196, 0.1);
    border-color: var(--neon-violet);
}
.instrument-trigger.snare-color.playing .dot {
    background: var(--neon-violet);
    box-shadow: 0 0 6px var(--neon-violet);
}

.instrument-trigger.hihat-color:hover {
    background: rgba(207, 122, 145, 0.1);
    border-color: var(--neon-pink);
}
.instrument-trigger.hihat-color.playing .dot {
    background: var(--neon-pink);
    box-shadow: 0 0 6px var(--neon-pink);
}

.instrument-trigger.clap-color:hover {
    background: rgba(217, 140, 95, 0.1);
    border-color: #d98c5f;
}
.instrument-trigger.clap-color.playing .dot {
    background: #d98c5f;
    box-shadow: 0 0 6px #d98c5f;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(16, 1fr);
    gap: 6px;
}

.step-btn {
    aspect-ratio: 1;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.step-btn::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    right: 2px;
    bottom: 2px;
    border-radius: 2px;
    background: transparent;
    transition: background var(--transition-fast);
}

/* Coloring steps on active state */
.step-btn:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
}

/* Beat division styling (every 4 steps is highlighted) */
.step-btn.beat-accent {
    background: rgba(255, 255, 255, 0.05);
}

/* On narrow screens the 16 steps no longer fit at a tappable size: switch the grid
   to fixed-width columns that scroll horizontally, with the instrument label frozen
   on the left (same "freeze pane" approach used by the Piano Roll). */
@media (max-width: 720px) {
    .sequencer-grid-container {
        overflow-x: auto;
    }

    .sequencer-header-row,
    .drum-track {
        display: flex;
        align-items: center;
        width: max-content;
        min-width: 100%;
    }

    .track-label-header,
    .instrument-trigger {
        width: 85px;
        flex-shrink: 0;
        position: sticky;
        left: 0;
        z-index: 5;
    }

    .instrument-trigger {
        background: #141414;
    }

    .track-label-header {
        background: var(--bg-panel);
        padding-right: 12px;
    }

    .steps-indicators,
    .steps-grid {
        grid-template-columns: repeat(16, 34px);
    }
}

/* Kick sequencer colors */
.drum-track[data-instrument="kick"] .step-btn.active-step::after {
    background: var(--neon-cyan);
}
.drum-track[data-instrument="kick"] .step-btn.active-step {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 8px var(--neon-cyan-glow);
}

/* Snare sequencer colors */
.drum-track[data-instrument="snare"] .step-btn.active-step::after {
    background: var(--neon-violet);
}
.drum-track[data-instrument="snare"] .step-btn.active-step {
    border-color: var(--neon-violet);
    box-shadow: 0 0 8px var(--neon-violet-glow);
}

/* Hihat sequencer colors */
.drum-track[data-instrument="hihat"] .step-btn.active-step::after {
    background: var(--neon-pink);
}
.drum-track[data-instrument="hihat"] .step-btn.active-step {
    border-color: var(--neon-pink);
    box-shadow: 0 0 8px var(--neon-pink-glow);
}

/* Clap sequencer colors */
.drum-track[data-instrument="clap"] .step-btn.active-step::after {
    background: #d98c5f;
}
.drum-track[data-instrument="clap"] .step-btn.active-step {
    border-color: #d98c5f;
    box-shadow: 0 0 8px rgba(217, 140, 95, 0.25);
}

/* Playback step glow overlay during sequencing */
.step-btn.playing-now {
    filter: brightness(1.4);
    box-shadow: inset 0 0 4px white;
}

/* Visualizer Canvas styles */
.canvas-container {
    position: relative;
    width: 100%;
    height: 180px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.02);
    overflow: hidden;
}

#audio-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.canvas-overlay-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.75rem;
    color: var(--text-dark);
    pointer-events: none;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-family: 'Inter', sans-serif;
    transition: opacity 0.5s ease;
}

.canvas-overlay-text.hidden {
    opacity: 0;
}

.visualizer-toggle-group {
    display: flex;
    gap: 4px;
    background: rgba(0, 0, 0, 0.2);
    padding: 3px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.toggle-btn {
    border: none;
    outline: none;
    background: transparent;
    padding: 4px 12px;
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toggle-btn.active {
    background: rgba(255, 255, 255, 0.08);
    color: var(--neon-cyan);
    text-shadow: 0 0 4px var(--neon-cyan-glow);
}

/* ------------------------------------------------------------- */
/* Piano Roll Specific Styles */
/* ------------------------------------------------------------- */

.pianoroll-panel {
    margin-top: 10px;
}

.pianoroll-title-group h2 {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 1.3rem;
}

.pianoroll-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.midi-export-btn {
    background: rgba(201, 146, 42, 0.10);
    border-color: rgba(201, 146, 42, 0.28);
    color: #E8B84B;
}

.midi-export-btn:hover {
    background: rgba(201, 146, 42, 0.20);
    border-color: var(--lgold);
    box-shadow: 0 0 15px var(--neon-cyan-glow);
    color: var(--text-main);
}

/* Record button: idle state hints red, pulses once armed */
.btn-record {
    background: rgba(255, 0, 60, 0.08);
    border-color: rgba(255, 0, 60, 0.25);
    color: #ff5c7a;
}

.btn-record:hover {
    background: rgba(255, 0, 60, 0.18);
    border-color: #ff2d55;
    color: var(--text-main);
}

.btn-record.recording {
    background: #ff2d55;
    border-color: #ff2d55;
    color: var(--text-main);
    box-shadow: 0 0 12px rgba(255, 45, 85, 0.6);
    animation: rec-pulse 1.1s ease-in-out infinite;
}

@keyframes rec-pulse {
    0%, 100% { box-shadow: 0 0 8px rgba(255, 45, 85, 0.5); }
    50% { box-shadow: 0 0 18px rgba(255, 45, 85, 0.9); }
}

/* Overdub toggle: pill button that lights up cyan when additive recording is active */
#btn-toggle-overdub.active {
    background: rgba(232, 184, 75, 0.15);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-cyan-glow);
}

.pianoroll-scroll-container {
    width: 100%;
    min-width: 0;
    max-height: 520px; /* Caps visible octaves so the rest scrolls vertically */
    overflow-x: auto;
    overflow-y: auto;
    background: rgba(0, 0, 0, 0.25);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.02);
    padding: 10px;
    scrollbar-width: thin;
    scrollbar-color: var(--gold) rgba(255, 255, 255, 0.04);
}

.pianoroll-scroll-container::-webkit-scrollbar {
    height: 8px;
    width: 8px;
}

.pianoroll-scroll-container::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.04);
    border-radius: 4px;
}

.pianoroll-scroll-container::-webkit-scrollbar-thumb {
    background: var(--gold);
    border-radius: 4px;
}

.pianoroll-grid-wrapper {
    display: flex;
    width: max-content; /* Size to the full 64-step content so overflow scrolls horizontally */
}

/* Sidebar with mini piano keys: frozen on the horizontal axis while scrolling through steps */
.pianoroll-notes-sidebar {
    width: 80px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    border-right: 2px solid rgba(255, 255, 255, 0.05);
    position: sticky;
    left: 0;
    z-index: 15;
    background: #0f0f0f;
}

/* Frozen top-left corner: stays put through both horizontal and vertical scroll */
.pianoroll-sidebar-corner {
    height: 26px;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 20;
    background: #0f0f0f;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.pianoroll-note-key {
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 10px;
    font-size: 0.68rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
    position: relative;
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.pianoroll-note-key.white-sidebar-key {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
}

.pianoroll-note-key.white-sidebar-key:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-main);
}

.pianoroll-note-key.black-sidebar-key {
    background: rgba(13, 10, 24, 0.85);
    color: var(--text-dark);
}

.pianoroll-note-key.black-sidebar-key:hover {
    color: var(--text-muted);
}

.pianoroll-note-key.black-sidebar-key:hover::after {
    background: #1f1f1f;
}

.pianoroll-note-key.key-active {
    color: var(--text-main) !important;
    box-shadow: inset 0 0 10px var(--neon-cyan-glow);
}

.pianoroll-note-key.white-sidebar-key.key-active {
    background: linear-gradient(135deg, var(--lgold), var(--gold));
}

.pianoroll-note-key.black-sidebar-key.key-active::after {
    background: linear-gradient(135deg, var(--lgold), var(--gold));
}

.pianoroll-note-key.black-sidebar-key::after {
    content: '';
    position: absolute;
    right: 0;
    top: 3px;
    height: 24px;
    width: 32px;
    background: #000;
    border: 1px solid var(--border-color);
    border-right: none;
    border-radius: 2px 0 0 2px;
}

/* Scrollable Inner container for header + grid */
.pianoroll-grid-container-inner {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

/* Steps numbers inside the piano roll scroll wrapper (64 fixed-width columns = 4 bars) */
/* Frozen on the vertical axis while scrolling through octaves */
.pianoroll-steps-header {
    height: 26px;
    display: grid;
    grid-template-columns: repeat(64, 36px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    position: sticky;
    top: 0;
    z-index: 10;
    background: #0f0f0f;
}

.pianoroll-step-num {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-dark);
    font-family: monospace;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pianoroll-step-num.bar-start {
    color: var(--text-muted);
    border-left: 2px solid rgba(255, 255, 255, 0.12);
}

.pianoroll-step-num.active-step-col {
    color: var(--neon-pink);
    text-shadow: 0 0 5px var(--neon-pink-glow);
}

/* Main cell grid */
.pianoroll-grid {
    display: flex;
    flex-direction: column;
}

.pianoroll-row {
    height: 30px;
    display: grid;
    grid-template-columns: repeat(64, 36px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.015);
}

.pianoroll-cell {
    border-right: 1px solid rgba(255, 255, 255, 0.015);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

/* Zebra striping for black key rows */
.pianoroll-row[data-is-black="true"] .pianoroll-cell {
    background: rgba(0, 0, 0, 0.12);
}

.pianoroll-cell:hover {
    background: rgba(255, 255, 255, 0.03) !important;
}

/* Vertical grid line accentuation for beat division (every 4th step, all 4 bars) */
.pianoroll-cell.beat-accent {
    border-left: 1.5px solid rgba(255, 255, 255, 0.04);
}

/* Stronger landmark border at the start of each bar (every 16 steps) */
.pianoroll-cell.bar-start {
    border-left: 2px solid rgba(255, 255, 255, 0.12);
}

/* Active notes in Piano Roll */
.pianoroll-cell.active {
    background: linear-gradient(135deg, var(--lgold), var(--gold)) !important;
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.2), 0 0 8px var(--neon-cyan-glow);
    z-index: 10;
}

/* Playback head styling - highlights the currently playing column of cells */
.pianoroll-cell.playing-col {
    background-color: rgba(232, 184, 75, 0.04);
    box-shadow: inset 0 0 2px rgba(232, 184, 75, 0.2);
}

.pianoroll-cell.active.playing-col {
    filter: brightness(1.25);
    box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.4), 0 0 15px var(--neon-cyan);
}

/* Header buttons and general control buttons */
.btn-control {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 18px;
    color: var(--text-main);
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast);
}

.btn-control:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.play-btn {
    background: rgba(232, 184, 75, 0.08);
    border-color: rgba(232, 184, 75, 0.2);
    color: var(--neon-cyan);
    min-width: 105px;
    justify-content: center;
}

.play-btn:hover {
    background: rgba(232, 184, 75, 0.15);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-cyan-glow);
}

.play-btn.playing {
    background: rgba(207, 122, 145, 0.08);
    border-color: rgba(207, 122, 145, 0.2);
    color: var(--neon-pink);
}

.play-btn.playing:hover {
    background: rgba(207, 122, 145, 0.15);
    border-color: var(--neon-pink);
    box-shadow: 0 0 15px var(--neon-pink-glow);
}

.btn-secondary {
    color: var(--text-muted);
}
.btn-secondary:hover {
    color: var(--text-main);
    background: rgba(255, 0, 0, 0.1);
    border-color: rgba(255, 0, 0, 0.25);
}

.hidden {
    display: none !important;
}

/* Footer guide */
.app-instructions {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.app-instructions h3 {
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: 0.5px;
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 768px) {
    .guide-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

.guide-item {
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--text-muted);
}

.guide-item strong {
    color: var(--text-main);
    display: block;
    margin-bottom: 4px;
}

.guide-item code {
    background: rgba(255, 255, 255, 0.06);
    padding: 2px 4px;
    border-radius: 4px;
    font-family: monospace;
    color: var(--neon-cyan);
}

/* Keyframes */
@keyframes pulse-glow {
    from {
        filter: drop-shadow(0 0 15px rgba(201, 146, 42, 0.4));
    }
    to {
        filter: drop-shadow(0 0 25px rgba(232, 184, 75, 0.75));
    }
}

/* ------------------------------------------------------------- */
/* Lowegate integration: back-to-site link + language switcher   */
/* ------------------------------------------------------------- */
.lab-logo-link {
    text-decoration: none;
    cursor: pointer;
}
.lab-logo-link:hover .lab-back-arrow {
    color: var(--lgold);
    transform: translateX(-3px);
}
.lab-logo-link:hover h1 {
    color: #ffffff;
}
.lab-back-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.lang-switcher.lab-lang {
    display: inline-flex;
    gap: 4px;
}
.lab-lang .lang-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-family: 'Inter', sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.lab-lang .lang-btn:hover {
    color: var(--text-main);
    border-color: var(--border-hover);
}
.lab-lang .lang-btn.active {
    background: rgba(201, 146, 42, 0.15);
    border-color: var(--lgold);
    color: var(--lgold);
}