:root {
    --bg-dark: #0a0e17;
    --card-bg: #121826;
    --card-border: #1e293b;
    --card-hover: #1b2438;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    
    --accent-cyan: #38bdf8;
    --accent-purple: #818cf8;
    --accent-amber: #f59e0b;
    --accent-pink: #ec4899;
    --accent-emerald: #10b981;
    --accent-red: #ef4444;

    --glow-cyan: 0 0 16px rgba(56, 189, 248, 0.35);
    --glow-purple: 0 0 16px rgba(129, 140, 248, 0.35);
    --glow-amber: 0 0 16px rgba(245, 158, 11, 0.35);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    padding: 20px 24px;
    overflow-x: hidden;
}

/* Header & Status Bar */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 14px 24px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 26px;
    filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.6));
}

.logo-text h1 {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text span {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.midi-status-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--card-border);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
}

.status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
}

.status-dot.online {
    background: var(--accent-emerald);
    box-shadow: 0 0 8px var(--accent-emerald);
}

.status-dot.offline {
    background: var(--accent-red);
    box-shadow: 0 0 8px var(--accent-red);
}

.btn-panic {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-panic:hover {
    background: rgba(239, 68, 68, 0.3);
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.4);
}

/* Hero Section */
.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.hero-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.card-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.card-title {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    font-weight: 700;
}

/* Chord Display */
.chord-big-title {
    font-size: 44px;
    font-weight: 800;
    color: var(--accent-amber);
    text-shadow: 0 0 20px rgba(245, 158, 11, 0.4);
    line-height: 1.1;
    margin-bottom: 6px;
}

.chord-desc {
    font-size: 15px;
    color: var(--text-main);
    margin-bottom: 14px;
}

.scales-section {
    margin-top: 8px;
    flex: 1;
}

.scales-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-dim);
    margin-bottom: 6px;
}

.scales-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    list-style: none;
    margin-bottom: 12px;
}

.scale-badge {
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.25);
    color: var(--accent-cyan);
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 500;
}

.active-pitches-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: auto;
    padding-top: 10px;
    border-top: 1px solid var(--card-border);
}

.pitch-tag {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.pitch-tag.core {
    background: rgba(245, 158, 11, 0.2);
    color: var(--accent-amber);
    border: 1px solid rgba(245, 158, 11, 0.4);
}

.pitch-tag.sub_bass {
    background: rgba(56, 189, 248, 0.2);
    color: var(--accent-cyan);
    border: 1px solid rgba(56, 189, 248, 0.4);
}

.pitch-tag.shimmer {
    background: rgba(236, 72, 153, 0.2);
    color: var(--accent-pink);
    border: 1px solid rgba(236, 72, 153, 0.4);
}

.pitch-tag.fifth_drone {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-emerald);
    border: 1px solid rgba(16, 185, 129, 0.4);
}

/* Visualizer Canvas */
.visualizer-container {
    height: 180px;
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(56, 189, 248, 0.15);
}

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

/* Preset & Instrument Bar */
.toolbar-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.instrument-picker-row {
    display: flex;
    align-items: center;
    gap: 16px;
}

.instrument-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    white-space: nowrap;
}

.instrument-select {
    flex: 1;
    background: #0f172a;
    border: 1px solid #334155;
    color: #f8fafc;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}

.instrument-select:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.instrument-progress-wrap {
    display: none;
    width: 160px;
    height: 6px;
    background: #1e293b;
    border-radius: 3px;
    overflow: hidden;
}

.instrument-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    transition: width 0.15s ease;
}

.presets-container {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.presets-label {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
    margin-right: 6px;
}

.preset-btn {
    background: rgba(30, 41, 59, 0.7);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 7px 14px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    background: rgba(56, 189, 248, 0.15);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-1px);
}

/* Modular Rack Grid */
.rack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 18px;
    margin-bottom: 20px;
}

.module-box {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.module-box.disabled-state {
    opacity: 0.5;
    filter: grayscale(0.5);
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 10px;
}

.module-name {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 38px;
    height: 20px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-switch {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #334155;
    transition: .3s;
    border-radius: 20px;
}

.slider-switch:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
}

input:checked + .slider-switch {
    background-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}

input:checked + .slider-switch:before {
    transform: translateX(18px);
}

/* Sliders & Inputs */
.param-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.param-label-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

.param-val {
    font-weight: 600;
    color: var(--accent-cyan);
}

.range-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #1e293b;
    outline: none;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-cyan);
    cursor: pointer;
    box-shadow: 0 0 8px rgba(56, 189, 248, 0.6);
}

.radio-pill-group {
    display: flex;
    gap: 8px;
    background: #0f172a;
    padding: 4px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
}

.radio-pill-label {
    flex: 1;
    text-align: center;
    font-size: 12px;
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-muted);
    font-weight: 500;
    transition: all 0.2s;
}

.radio-pill-label input {
    display: none;
}

.radio-pill-label:has(input:checked) {
    background: var(--accent-purple);
    color: #ffffff;
    box-shadow: 0 0 10px rgba(129, 140, 248, 0.4);
}

/* Novation Hardware HUD */
.hardware-hud-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 18px 22px;
    margin-bottom: 20px;
}

.hud-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.hud-title {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-dim);
}

.knobs-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 12px;
    margin-bottom: 18px;
}

@media (max-width: 900px) {
    .knobs-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.knob-widget {
    background: #0f172a;
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.knob-ring-outer {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: radial-gradient(circle, #1e293b 60%, #334155 100%);
    border: 2px solid #475569;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
}

.knob-cap {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1e293b, #0f172a);
    position: relative;
}

.knob-notch {
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 10px;
    background: var(--accent-cyan);
    border-radius: 2px;
    box-shadow: 0 0 6px var(--accent-cyan);
    transform-origin: 50% 15px;
}

.knob-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 100%;
}

.knob-name {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.knob-subline {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.knob-cc {
    font-size: 10px;
    color: var(--text-dim);
}

.btn-learn {
    background: #1e293b;
    border: 1px solid #475569;
    color: var(--text-muted);
    font-size: 9px;
    padding: 2px 5px;
    border-radius: 4px;
    cursor: pointer;
}

.btn-learn.learning {
    background: var(--accent-amber);
    color: #000;
    font-weight: 700;
    animation: pulse 1s infinite;
}

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

/* Pads Grid */
.pads-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 10px;
}

@media (max-width: 900px) {
    .pads-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.pad-widget {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 8px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.1s ease;
}

.pad-widget:hover {
    background: #273549;
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.pad-widget.hit {
    background: var(--accent-cyan);
    color: #000;
    box-shadow: 0 0 16px var(--accent-cyan);
    transform: scale(0.96);
}

/* Interactive 61-Key Piano */
.piano-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 16px 20px;
}

.piano-wrapper {
    position: relative;
    display: flex;
    height: 130px;
    overflow-x: auto;
    padding-bottom: 6px;
}

.piano-key {
    position: relative;
    cursor: pointer;
    border-radius: 0 0 5px 5px;
    transition: background 0.1s, transform 0.05s;
    flex-shrink: 0;
}

.white-key {
    width: 28px;
    height: 120px;
    background: #f1f5f9;
    border: 1px solid #94a3b8;
    z-index: 1;
    margin-right: -1px;
}

.white-key:hover {
    background: #e2e8f0;
}

.black-key {
    width: 18px;
    height: 75px;
    background: #0f172a;
    border: 1px solid #000;
    margin-left: -9px;
    margin-right: -9px;
    z-index: 2;
}

.black-key:hover {
    background: #1e293b;
}

.key-label {
    position: absolute;
    bottom: 6px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 9px;
    font-weight: 700;
    color: #64748b;
    pointer-events: none;
}

/* Active Keys Color Coding */
.piano-key.active-core {
    background: var(--accent-amber) !important;
    box-shadow: 0 0 14px var(--accent-amber);
    transform: translateY(2px);
}

.piano-key.active-sub {
    background: var(--accent-cyan) !important;
    box-shadow: 0 0 14px var(--accent-cyan);
    transform: translateY(2px);
}

.piano-key.active-shimmer {
    background: var(--accent-pink) !important;
    box-shadow: 0 0 14px var(--accent-pink);
    transform: translateY(2px);
}

.piano-key.active-fifth {
    background: var(--accent-emerald) !important;
    box-shadow: 0 0 14px var(--accent-emerald);
    transform: translateY(2px);
}

/* Start Overlay for Browser Audio Policy */
#start-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 14, 23, 0.92);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

.start-dialog {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 36px 42px;
    border-radius: 16px;
    text-align: center;
    max-width: 480px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.8);
}

.start-dialog h2 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.start-dialog p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 24px;
}

.btn-start-hero {
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    color: #0f172a;
    font-size: 15px;
    font-weight: 700;
    padding: 12px 32px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-start-hero:hover {
    transform: scale(1.04);
    box-shadow: 0 0 28px rgba(56, 189, 248, 0.7);
}

/* Quick Drone Selector Section */
.quick-trigger-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 18px 22px;
    margin-bottom: 20px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.qt-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--card-border);
}

.qt-title-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.qt-badge {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.15), rgba(129, 140, 248, 0.2));
    border: 1px solid rgba(56, 189, 248, 0.4);
    color: var(--accent-cyan);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1px;
    padding: 4px 10px;
    border-radius: 6px;
    text-transform: uppercase;
}

.qt-subtitle {
    font-size: 12px;
    color: var(--text-muted);
}

.qt-actions-group {
    display: flex;
    align-items: center;
    gap: 14px;
}

.octave-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

.oct-label {
    font-size: 11px;
    color: var(--text-dim);
    font-weight: 700;
    letter-spacing: 0.8px;
}

.oct-btn-group {
    display: flex;
    background: #0f172a;
    border: 1px solid var(--card-border);
    border-radius: 6px;
    padding: 2px;
}

.oct-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

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

.oct-btn.active {
    background: var(--accent-cyan);
    color: #0f172a;
    font-weight: 700;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}

.btn-quick-stop {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #f87171;
    font-size: 11px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.5px;
}

.btn-quick-stop:hover {
    background: rgba(239, 68, 68, 0.35);
    color: #fff;
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.5);
}

/* 12-Pitch Button Grid */
.pitch-selector-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 6px;
    margin-bottom: 16px;
}

@media (max-width: 900px) {
    .pitch-selector-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

.pitch-btn {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 8px;
    padding: 10px 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s ease;
    min-height: 52px;
}

.pitch-btn:hover {
    background: #273549;
    border-color: var(--accent-amber);
    transform: translateY(-1px);
}

.pitch-btn.accidental {
    background: #0f172a;
    border-color: #1e293b;
}

.pitch-btn.accidental:hover {
    background: #1b263b;
    border-color: var(--accent-amber);
}

.p-note {
    font-size: 15px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.1;
}

.p-enh {
    font-size: 9px;
    font-weight: 600;
    color: var(--text-dim);
    margin-top: 2px;
}

.pitch-btn.active {
    background: linear-gradient(135deg, #f59e0b, #d97706) !important;
    border-color: #fbbf24 !important;
    box-shadow: 0 0 18px rgba(245, 158, 11, 0.55);
    transform: translateY(-2px);
}

.pitch-btn.active .p-note,
.pitch-btn.active .p-enh {
    color: #000 !important;
    font-weight: 900;
}

/* Chord Modifiers Panel */
.modifiers-panel {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: #0f172a;
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 12px 16px;
}

.mod-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.mod-category-label {
    font-size: 10px;
    font-weight: 800;
    color: var(--text-dim);
    letter-spacing: 0.8px;
    min-width: 120px;
}

.mod-button-group {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    flex: 1;
}

.mod-btn {
    background: #1e293b;
    border: 1px solid #334155;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    padding: 5px 11px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.mod-btn:hover {
    background: #273549;
    color: var(--text-main);
    border-color: var(--accent-purple);
}

.mod-btn.active {
    background: linear-gradient(135deg, #818cf8, #6366f1);
    border-color: #a5b4fc;
    color: #ffffff;
    font-weight: 700;
    box-shadow: 0 0 14px rgba(129, 140, 248, 0.5);
}