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

:root {
    --bg-dark: #0a0a0f;
    --bg-panel: #12121a;
    --bg-control: #1a1a25;
    --border: #2a2a3a;
    --text: #e0e0e0;
    --text-dim: #808090;
    --part1: #00ffff;
    --part2: #ff00ff;
    --part3: #ffff00;
    --part4: #00ff88;
    --active: #ffffff;
    --inactive: #3a3a4a;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Orbitron', sans-serif;
    background: var(--bg-dark);
    color: var(--text);
}

input, select, button {
    font-family: 'Orbitron', sans-serif;
}

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

header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: clamp(5px, 1vh, 10px) clamp(10px, 2vw, 20px);
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    gap: clamp(6px, 1vw, 12px);
    flex-wrap: wrap;
    flex-shrink: 0;
    min-height: fit-content;
}

h1 {
    font-size: clamp(0.9rem, 2vw, 1.4rem);
    font-weight: 700;
    letter-spacing: clamp(1px, 0.3vw, 3px);
    color: var(--text);
    white-space: nowrap;
}

h1 .version {
    font-size: 0.8rem;
    color: var(--part1);
    vertical-align: super;
}

.transport {
    display: flex;
    align-items: center;
    gap: 15px;
}

.transport-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--part1);
    background: transparent;
    color: var(--part1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.transport-btn:hover {
    background: var(--part1);
    color: var(--bg-dark);
}

.transport-btn.playing {
    background: var(--part1);
    color: var(--bg-dark);
}

.tempo-control, .swing-control, .steps-control, .rate-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.tempo-control label, .swing-control label, .steps-control label, .rate-control label {
    font-size: 0.65rem;
    color: var(--text-dim);
    letter-spacing: 1px;
}

.steps-control select, .rate-control select {
    background: var(--bg-control);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 4px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    min-width: 55px;
}

.tempo-control input[type="number"] {
    width: 60px;
    background: var(--bg-control);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 5px;
    text-align: center;
    font-size: 0.9rem;
    border-radius: 4px;
}

.swing-control input[type="range"] {
    width: 60px;
}

.midi-section {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    flex-wrap: nowrap;
    justify-content: flex-end;
    flex-shrink: 1;
}

.midi-io, .midi-sync {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.midi-io label, .midi-sync label {
    font-size: 0.5rem;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

.midi-section select {
    background: var(--bg-control);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 2px 3px;
    border-radius: 3px;
    font-size: 0.55rem;
    min-width: 0;
    max-width: 65px;
}

.midi-sync select {
    min-width: 0;
    max-width: 45px;
}

.bus-in-row {
    display: flex;
    align-items: center;
    gap: 4px;
}

#virtual-bus-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: #444;
    border-radius: 50%;
    transition: background 0.1s;
    flex-shrink: 0;
}

#tempo:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.midi-learn-btn {
    padding: 0 10px;
    height: 32px;
    background: var(--bg-control);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.midi-learn-btn:hover {
    border-color: var(--part1);
    color: var(--part1);
}

.midi-learn-btn.active {
    background: var(--part1);
    color: var(--bg-dark);
    border-color: var(--part1);
    animation: pulse 1s infinite;
}

.fullscreen-btn {
    width: 32px;
    height: 32px;
    background: var(--bg-control);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    flex-shrink: 0;
}

.fullscreen-btn:hover {
    border-color: var(--part1);
    color: var(--part1);
}

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

.midi-ch {
    display: flex;
    align-items: center;
    gap: 4px;
}

.midi-ch label {
    font-size: 0.55rem;
    color: var(--text-dim);
}

.midi-ch select {
    background: var(--bg-control);
    border: 1px solid var(--border);
    color: var(--part-color);
    padding: 2px 4px;
    font-size: 0.65rem;
    border-radius: 3px;
    min-width: 45px;
}

.midi-bus-out {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: 4px;
}

.midi-bus-out label {
    font-size: 0.6rem;
}

.midi-bus-out select {
    background: var(--bg-control);
    border: 1px solid var(--border);
    color: var(--part-color);
    padding: 2px 4px;
    font-size: 0.6rem;
    border-radius: 3px;
    min-width: 36px;
}

input[type="range"].midi-learning {
    outline: 3px solid #00ff00 !important;
    box-shadow: 0 0 10px #00ff00, 0 0 20px #00ff00 !important;
    animation: midi-learn-pulse 0.5s infinite;
}

@keyframes midi-learn-pulse {
    0%, 100% { box-shadow: 0 0 10px #00ff00, 0 0 20px #00ff00; }
    50% { box-shadow: 0 0 15px #00ff00, 0 0 30px #00ff00; }
}

main#parts-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    flex: 1;
    background: var(--border);
    overflow: hidden;
    min-height: 0;
}

@media (max-width: 600px) {
    main#parts-container {
        grid-template-columns: 1fr;
    }
}

.part {
    background: var(--bg-panel);
    padding: clamp(6px, 1vw, 12px);
    display: flex;
    flex-direction: column;
    gap: clamp(4px, 0.8vh, 10px);
    overflow: hidden;
    min-height: 0;
}

.part[data-part="0"] { --part-color: var(--part1); }
.part[data-part="1"] { --part-color: var(--part2); }
.part[data-part="2"] { --part-color: var(--part3); }
.part[data-part="3"] { --part-color: var(--part4); }

.part-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--part-color);
}

.part-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--part-color);
}

.preset-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.preset-select {
    background: var(--bg-control);
    border: 1px solid var(--border);
    color: var(--part-color);
    padding: 3px 6px;
    font-size: 0.6rem;
    border-radius: 4px;
    min-width: 90px;
    max-width: 100px;
    cursor: pointer;
}

.preset-select:hover {
    border-color: var(--part-color);
}

.preset-save-btn {
    padding: 3px 8px;
    background: var(--bg-control);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.55rem;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s;
}

.preset-save-btn:hover {
    border-color: var(--part-color);
    color: var(--part-color);
}

.part-controls {
    display: flex;
    gap: 5px;
}

.mute-btn, .solo-btn {
    width: 24px;
    height: 24px;
    border: 1px solid var(--border);
    background: var(--bg-control);
    color: var(--text-dim);
    font-size: 0.65rem;
    font-weight: 700;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.1s;
}

.mute-btn.active {
    background: #ff4444;
    color: white;
    border-color: #ff4444;
}

.solo-btn.active {
    background: #44ff44;
    color: black;
    border-color: #44ff44;
}

.osc-waveform-row {
    display: flex;
    gap: 6px;
    align-items: stretch;
    min-height: 32px;
    flex: 1;
}

.osc-section {
    display: flex;
    gap: 4px;
    align-items: center;
    flex: 0 0 auto;
}

.filter-section, .env-section, .output-section {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.osc {
    display: flex;
    align-items: center;
    gap: 3px;
}

.osc label {
    font-size: 0.5rem;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

.osc select {
    background: var(--bg-control);
    border: 1px solid var(--border);
    color: var(--part-color);
    padding: 2px 4px;
    font-size: 0.6rem;
    border-radius: 3px;
    height: 22px;
}

.waveform-display {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    flex: 1;
    min-height: 28px;
    position: relative;
    overflow: hidden;
}

.waveform-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.knob-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 4px;
    flex: 1;
    min-width: 40px;
}

.knob-group label {
    font-size: 0.5rem;
    color: var(--text-dim);
    letter-spacing: 0.5px;
    min-width: 28px;
}

.knob-group input[type="range"] {
    flex: 1;
    max-width: 80px;
    height: 4px;
}

.output-section {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 4px 0;
    flex-shrink: 0;
}

.output-section .knob-group {
    flex: 0 1 auto;
}

.gate-section {
    background: var(--bg-control);
    border-radius: 6px;
    padding: clamp(4px, 0.8vh, 8px);
    flex-shrink: 0;
}

.gate-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: clamp(4px, 0.6vh, 8px);
}

.gate-header span {
    font-size: clamp(0.5rem, 1vw, 0.65rem);
    color: var(--text-dim);
    letter-spacing: 1px;
}

.gate-controls input[type="range"] {
    width: 60px;
    height: 4px;
}

.gate-rand-btn, .gate-reset-btn {
    padding: 2px 6px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.15s;
}

.gate-rand-btn:hover, .gate-reset-btn:hover {
    border-color: var(--part-color);
    color: var(--part-color);
}

.part-steps, .part-rate {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--part-color);
    padding: 2px 4px;
    font-size: 0.5rem;
    border-radius: 3px;
    cursor: pointer;
}

.part-steps:hover, .part-rate:hover {
    border-color: var(--part-color);
}

.gate-sequencer {
    display: grid;
    grid-template-columns: repeat(16, 1fr);
    gap: clamp(1px, 0.3vw, 2px);
}

.gate-step {
    height: clamp(12px, 2vw, 18px);
    background: var(--inactive);
    border-radius: 2px;
    cursor: pointer;
    transition: background 0.1s, box-shadow 0.1s;
    position: relative;
}

.gate-step:hover {
    background: var(--text-dim);
}

.gate-step.active {
    background: var(--part-color);
    box-shadow: 0 0 8px var(--part-color);
}

.gate-step.tie {
    background: linear-gradient(90deg, var(--part-color) 0%, var(--part-color) 50%, transparent 50%);
    box-shadow: 0 0 4px var(--part-color);
    position: relative;
}

.gate-step.tie::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 2px;
    background: var(--part-color);
}

.gate-step.current::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--active);
    border-radius: 50%;
}

.step-indicator {
    height: 2px;
    margin-top: 4px;
    background: var(--bg-dark);
    border-radius: 1px;
    position: relative;
}

.step-indicator .indicator {
    position: absolute;
    width: 6.25%;
    height: 100%;
    background: var(--part-color);
    border-radius: 1px;
    transition: left 0.05s linear;
}

footer {
    padding: clamp(5px, 1vh, 10px) 20px;
    background: var(--bg-panel);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: center;
    flex-shrink: 0;
}

.master-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.master-section .knob-group {
    flex-direction: row;
    gap: 10px;
}

.master-section input[type="range"] {
    width: 150px;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-dark);
    height: 6px;
    border-radius: 3px;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--text);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type="range"]:focus {
    outline: none;
}

.part input[type="range"]::-webkit-slider-thumb {
    background: var(--part-color);
}

input[type="number"]:focus {
    outline: 1px solid var(--part1);
}

select:focus {
    outline: 1px solid var(--part-color);
}