/* Pico MIDI Arpeggiator - Styles matching ArpConductor design */

:root {
    --bg-dark: #1a1a2e;
    --bg-medium: #16213e;
    --bg-light: #1f2b47;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --text-primary: #eee;
    --text-secondary: #aaa;
    --success: #4caf50;
    --border-color: #2a3a5a;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.4;
    font-size: 14px;
}

/* Status Bar */
#status {
    background: var(--bg-medium);
    padding: 8px 16px;
    border-bottom: 1px solid var(--border-color);
}

#status-text {
    font-size: 12px;
    color: var(--text-secondary);
}

#status-text.connected {
    color: var(--success);
}

/* Navigation Bar */
.instrument-nav {
    display: flex;
    background: var(--bg-medium);
    border-bottom: 1px solid var(--border-color);
    padding: 0 16px;
}

.nav-tab {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

.nav-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

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

/* Instrument Views */
.instrument-view {
    display: none;
    background: var(--bg-medium);
    border-radius: 8px;
    padding: 16px;
}

.instrument-view.active {
    display: block;
}

/* Main Container */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px;
}

/* Euclidean Tracks */
.euclidean-tracks {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.euclidean-track {
    background: var(--bg-dark);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.track-header {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.track-label {
    font-weight: 600;
    min-width: 80px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.track-note {
    font-size: 11px;
    color: var(--accent);
    padding: 2px 6px;
    background: rgba(233, 69, 96, 0.2);
    border-radius: 3px;
}

.track-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.track-control {
    display: flex;
    align-items: center;
    gap: 4px;
}

.track-control label {
    font-size: 11px;
    color: var(--text-secondary);
}

.track-control input {
    width: 50px;
    padding: 4px 6px;
    font-size: 12px;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 4px;
}

.track-mute {
    margin-left: auto;
}

.track-buttons {
    display: flex;
    gap: 6px;
    align-items: center;
}

.track-mute-btn,
.vel-random-btn {
    padding: 4px 10px;
    font-size: 11px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
}

.track-mute-btn:hover,
.vel-random-btn:hover {
    background: var(--bg-medium);
}

.track-mute-btn.muted {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

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

.euclidean-step {
    --vel-opacity: 1;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--bg-medium);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    color: var(--text-secondary);
    transition: all 0.15s;
    cursor: ns-resize;
    user-select: none;
}

.euclidean-step.hit {
    background: rgba(233, 69, 96, var(--vel-opacity));
    border-color: var(--accent);
    color: white;
}

.euclidean-step.current {
    box-shadow: 0 0 0 2px var(--accent-hover);
}

.euclidean-step:hover {
    transform: scale(1.1);
}

.section-info {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.note-mode-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.note-mode-row select {
    padding: 6px 10px;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 4px;
    font-size: 13px;
}


/* Header */
.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.header-row h2 {
    font-size: 18px;
    color: var(--accent);
    font-weight: 600;
}

.header-buttons {
    display: flex;
    gap: 8px;
}

/* Control Panel */
.control-panel {
    background: var(--bg-light);
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 16px;
}

.control-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
}

.control-row+.control-row {
    margin-top: 12px;
}

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

.control-group.toggle-group {
    margin-left: auto;
    padding-left: 16px;
    border-left: 1px solid var(--border-color);
}

.control-group.toggle-group .toggle-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.control-group label {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Form Controls */
input[type="number"],
select {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 13px;
    min-width: 80px;
}

input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
}

/* Tempo with Sync Button */
.tempo-with-sync {
    display: flex;
    gap: 4px;
    align-items: center;
}

.sync-btn {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    transition: all 0.2s;
    white-space: nowrap;
}

.sync-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}


/* Arm Button */
.arm-btn {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
    white-space: nowrap;
}

.arm-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.arm-btn.armed {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    animation: pulse-armed 1s infinite alternate;
}

@keyframes pulse-armed {
    from {
        opacity: 0.8;
    }

    to {
        opacity: 1;
        box-shadow: 0 0 8px var(--accent);
    }
}

/* External-only controls (hidden when internal clock) */
.external-only {
    display: none;
}

.external-bpm {
    font-size: 11px;
    color: var(--success);
    margin-left: 8px;
    min-width: 80px;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    transition: 0.3s;
    border-radius: 24px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: var(--text-secondary);
    transition: 0.3s;
    border-radius: 50%;
}

.toggle-switch input:checked+.toggle-slider {
    background-color: var(--accent);
    border-color: var(--accent);
}

.toggle-switch input:checked+.toggle-slider:before {
    transform: translateX(20px);
    background-color: white;
}

.toggle-label {
    font-size: 13px;
    margin-left: 4px;
}

.power-group {
    padding-right: 16px;
    border-right: 1px solid var(--border-color);
    margin-right: 8px;
}

/* Buttons */
.control-button {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.control-button:hover {
    background: var(--accent);
    border-color: var(--accent);
}

/* Section Container */
.section-container {
    background: var(--bg-light);
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 16px;
}

.section-container h3 {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 500;
}

.section-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.section-header-row h3 {
    margin-bottom: 0;
}

.pattern-controls {
    display: flex;
    gap: 8px;
}

/* Notes Section */
.notes-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.held-notes {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    min-height: 32px;
    padding: 8px;
    background: var(--bg-dark);
    border-radius: 4px;
}

.note-tag {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: var(--accent);
    border-radius: 3px;
    font-size: 12px;
}

.note-tag.empty {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    font-style: italic;
}

.note-tag .remove-note {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 14px;
    padding: 0 2px;
    line-height: 1;
}

.preview-notes {
    color: var(--accent);
    font-style: italic;
    animation: pulse 0.8s infinite alternate;
}

@keyframes pulse {
    from {
        opacity: 0.7;
    }

    to {
        opacity: 1;
    }
}

.note-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.preset-btn {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    transition: all 0.2s;
}

.preset-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
}

/* Piano Keyboard */
.piano-container {
    margin-top: 16px;
    padding: 12px;
    background: var(--bg-medium);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.piano-info {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-align: center;
}

.piano-keyboard {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.octave-control {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.octave-control button {
    width: 28px;
    height: 28px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
}

.octave-control button:hover {
    background: var(--accent);
    border-color: var(--accent);
}

#octave-display {
    font-size: 14px;
    font-weight: bold;
    min-width: 30px;
    text-align: center;
}

.piano-keys {
    display: flex;
    position: relative;
    height: 120px;
    user-select: none;
}

.piano-key {
    position: relative;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    padding-bottom: 6px;
    transition: background 0.1s;
}

.piano-key.white {
    width: 36px;
    height: 120px;
    background: linear-gradient(to bottom, #f8f8f8, #fff);
    border: 1px solid #888;
    border-radius: 0 0 4px 4px;
    z-index: 1;
    margin-right: -1px;
}

.piano-key.black {
    width: 24px;
    height: 75px;
    background: linear-gradient(to bottom, #333, #111);
    border: 1px solid #000;
    border-radius: 0 0 3px 3px;
    position: absolute;
    z-index: 2;
    color: #aaa;
}

.piano-key.white:hover {
    background: linear-gradient(to bottom, #ffe0b2, #fff);
}

.piano-key.black:hover {
    background: linear-gradient(to bottom, #555, #222);
}

.piano-key.white.active {
    background: linear-gradient(to bottom, var(--accent), #ff8a80);
}

.piano-key.black.active {
    background: linear-gradient(to bottom, var(--accent), #b71c1c);
}

/* Held notes (from USB input) - blue/cyan color */
.piano-key.white.held {
    background: linear-gradient(to bottom, #4fc3f7, #0288d1);
    box-shadow: 0 0 8px rgba(79, 195, 247, 0.6);
}

.piano-key.black.held {
    background: linear-gradient(to bottom, #29b6f6, #01579b);
    box-shadow: 0 0 8px rgba(41, 182, 246, 0.6);
}

.piano-key .key-label {
    font-size: 10px;
    font-weight: bold;
    pointer-events: none;
}

.piano-key.white .key-label {
    color: #333;
}

.piano-key.black .key-label {
    color: #aaa;
    margin-bottom: 4px;
}

.piano-key .note-name {
    font-size: 9px;
    color: #666;
    pointer-events: none;
}

.piano-key.black .note-name {
    color: #888;
}

/* Sequencer Grid */
.sequencer-grid {
    overflow-x: auto;
}

.grid-header {
    display: flex;
    margin-bottom: 4px;
}

.header-cell {
    width: 70px;
    min-width: 70px;
}

.header-steps {
    display: flex;
    flex: 1;
}

.step-number {
    flex: 1;
    min-width: 32px;
    text-align: center;
    font-size: 10px;
    color: var(--text-secondary);
    padding: 4px 0;
}

.grid-rows {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.grid-row {
    display: flex;
}

.row-slide-controls {
    display: flex;
    height: 20px;
    margin-bottom: 2px;
}

.row-slide-spacer {
    width: 70px;
    min-width: 70px;
    padding-right: 8px;
}

.row-slide-buttons {
    display: flex;
    gap: 2px;
}

.row-slide-buttons button {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 20px;
    height: 18px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 9px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.row-slide-buttons button:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.row-label {
    width: 70px;
    min-width: 70px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-right: 8px;
}

.row-label-header {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.row-label-buttons {
    display: flex;
    gap: 4px;
}

.row-label-buttons button {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 24px;
    height: 24px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 12px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.row-label-buttons button:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.row-cells {
    display: flex;
    flex: 1;
    gap: 2px;
}

/* Pitch Cell - Vertical Slider */
.pitch-cell {
    flex: 1;
    min-width: 32px;
    height: 80px;
    background: var(--bg-dark);
    border-radius: 3px;
    position: relative;
    cursor: ns-resize;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

.pitch-cell .value-display {
    position: absolute;
    top: 2px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 9px;
    color: var(--text-secondary);
    z-index: 2;
    pointer-events: none;
}

.pitch-cell .indicator {
    position: absolute;
    left: 2px;
    right: 2px;
    background: rgba(233, 69, 96, 0.4);
    border-radius: 2px;
}

.pitch-cell .handle {
    position: absolute;
    left: 2px;
    right: 2px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
    z-index: 1;
}

.pitch-cell .center-line {
    position: absolute;
    left: 4px;
    right: 4px;
    top: 50%;
    height: 1px;
    background: var(--border-color);
}

/* Velocity Cell - Vertical Slider */
.velocity-cell {
    flex: 1;
    min-width: 32px;
    height: 60px;
    background: var(--bg-dark);
    border-radius: 3px;
    position: relative;
    cursor: ns-resize;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

.velocity-cell .value-display {
    position: absolute;
    top: 2px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 9px;
    color: var(--text-secondary);
    z-index: 2;
    pointer-events: none;
}

.velocity-cell .indicator {
    position: absolute;
    left: 2px;
    right: 2px;
    bottom: 0;
    background: rgba(33, 150, 243, 0.4);
    border-radius: 2px 2px 0 0;
}

.velocity-cell .handle {
    position: absolute;
    left: 2px;
    right: 2px;
    height: 4px;
    background: #2196f3;
    border-radius: 2px;
    z-index: 1;
}

/* Length Cell - Horizontal Slider */
.length-cell {
    flex: 1;
    min-width: 32px;
    height: 28px;
    background: var(--bg-dark);
    border-radius: 3px;
    position: relative;
    cursor: ns-resize;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

.length-cell .value-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 9px;
    color: var(--text-secondary);
    z-index: 2;
    pointer-events: none;
}

.length-cell .indicator {
    position: absolute;
    top: 2px;
    bottom: 2px;
    left: 0;
    background: rgba(76, 175, 80, 0.4);
    border-radius: 2px;
}

.length-cell .handle {
    position: absolute;
    top: 2px;
    bottom: 2px;
    width: 4px;
    background: var(--success);
    border-radius: 2px;
    z-index: 1;
}

/* Chord Progression */
.chord-options {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 12px;
}

.chord-toggle-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.chord-progression {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 50px;
    padding: 8px;
    background: var(--bg-dark);
    border-radius: 4px;
    margin-bottom: 10px;
}

.chord-slot {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 10px;
    background: var(--bg-medium);
    border-radius: 4px;
    border: 2px solid transparent;
    position: relative;
}

.chord-slot.active {
    border-color: var(--accent);
}

.chord-slot .chord-name {
    font-size: 12px;
    font-weight: 500;
}

.chord-slot .chord-notes {
    font-size: 10px;
    color: var(--text-secondary);
}

.chord-slot .remove-chord {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.add-chord-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.add-chord-row select {
    min-width: 60px;
}

/* Paint Mode */
body.painting {
    cursor: crosshair;
    user-select: none;
}

body.painting {
    user-select: none;
    -webkit-user-select: none;
    cursor: crosshair;
}

body.painting .pitch-cell,
body.painting .velocity-cell,
body.painting .length-cell {
    cursor: crosshair;
}

/* Responsive */
@media (max-width: 768px) {
    .main-container {
        padding: 8px;
    }

    .control-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .power-group {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-right: 0;
        padding-bottom: 12px;
        margin-right: 0;
        margin-bottom: 8px;
        width: 100%;
    }

    .pitch-cell {
        height: 60px;
    }

    .velocity-cell {
        height: 50px;
    }
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropbtn {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 24px;
    height: 24px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 14px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dropbtn:hover,
.dropbtn:focus {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.dropdown-content {
    display: none;
    position: fixed;
    background-color: var(--bg-light);
    min-width: 180px;
    max-height: 300px;
    overflow-y: auto;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.4);
    z-index: 1000;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    /* Align right */
}

.dropdown-content a {
    color: var(--text-primary);
    padding: 8px 12px;
    text-decoration: none;
    display: block;
    font-size: 12px;
}

.dropdown-content a:hover {
    background-color: var(--bg-medium);
    color: var(--accent);
}

.dropdown-content hr {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 4px 0;
}

.show {
    display: block;
}

/* The base LED style */
#virtual-led {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 10px;
    display: inline-block;
    transition: all 0.05s ease; /* Fast transition for snappy blinks */
    border: 1px solid rgba(0,0,0,0.2);
}

/* Off State (Dim Red or Grey) */
.led-off {
    background-color: #331111;
    box-shadow: inset 0 0 4px #000;
}

/* On State (Bright Green or Red) */
.led-active {
    background-color: #00ff44;
    box-shadow: 0 0 10px #00ff44, inset 0 0 2px #fff;
}

/* Beat Indicator (Blue flash for musical quarter note beats) */
.led-beat {
    background-color: #00aaff !important;
    box-shadow: 0 0 15px #00aaff, inset 0 0 2px #fff !important;
}

/* === RECORD BUTTON === */
.record-button {
    background-color: var(--bg-medium);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.record-button:hover {
    background-color: rgba(255, 60, 60, 0.2);
    border-color: #ff3c3c;
    color: #ff3c3c;
}

.record-button.active {
    background-color: #ff3c3c;
    color: white;
    border-color: #ff3c3c;
    animation: record-pulse 1s infinite;
}

@keyframes record-pulse {
    0%, 100% { 
        box-shadow: 0 0 5px #ff3c3c; 
    }
    50% { 
        box-shadow: 0 0 15px #ff3c3c, 0 0 25px rgba(255, 60, 60, 0.5); 
    }
}

/* === RECORD STEP INDICATOR === */
.record-step {
    background-color: rgba(255, 60, 60, 0.3) !important;
    border-color: #ff3c3c !important;
    animation: record-step-pulse 0.5s infinite;
}

.step-number.record-step {
    color: #ff3c3c;
    font-weight: bold;
}

@keyframes record-step-pulse {
    0%, 100% { 
        background-color: rgba(255, 60, 60, 0.2); 
    }
    50% { 
        background-color: rgba(255, 60, 60, 0.4); 
    }
}

/* ==============================
   EUCLIDEAN SEQUENCER STYLES
   ============================== */

.euclidean-lines {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.euclidean-line {
    background: var(--bg-dark);
    border-radius: 6px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s;
}

.euclidean-line.muted {
    opacity: 0.5;
    border-color: transparent;
}

.euclidean-line:hover {
    border-color: var(--accent);
}

.line-header {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.line-index {
    font-weight: 600;
    font-size: 13px;
    color: var(--accent);
    min-width: 24px;
}

.line-note-select {
    display: flex;
    align-items: center;
    gap: 4px;
}

.line-note-select select {
    min-width: 70px;
    padding: 4px 6px;
    font-size: 12px;
}

.line-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    flex: 1;
}

.line-control {
    display: flex;
    align-items: center;
    gap: 4px;
}

.line-control label {
    font-size: 10px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.line-control input[type="number"] {
    width: 48px;
    padding: 4px 6px;
    font-size: 12px;
}

.line-control select {
    padding: 4px 6px;
    font-size: 12px;
    min-width: 60px;
}

.line-actions {
    display: flex;
    gap: 6px;
    margin-left: auto;
}

.line-btn {
    padding: 4px 8px;
    font-size: 11px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s;
}

.line-btn:hover {
    background: var(--bg-medium);
    color: var(--text-primary);
}

.line-btn.mute-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.line-btn.remove-btn:hover {
    background: #c0392b;
    border-color: #c0392b;
    color: white;
}

/* Pattern visualization */
.line-pattern {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    padding: 4px 0;
}

.euclidean-step {
    --vel-opacity: 1;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--bg-medium);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8px;
    color: transparent;
    transition: all 0.15s;
    cursor: pointer;
    user-select: none;
}

.euclidean-step.hit {
    background: rgba(233, 69, 96, var(--vel-opacity));
    border-color: var(--accent);
    color: white;
}

.euclidean-step.current {
    box-shadow: 0 0 0 2px var(--accent-hover), 0 0 8px var(--accent);
}

.euclidean-step:hover {
    transform: scale(1.15);
    z-index: 1;
}

.euclidean-step:hover .step-vel {
    opacity: 1;
}

.step-vel {
    font-size: 7px;
    font-weight: bold;
    opacity: 0;
    transition: opacity 0.15s;
}

.euclidean-step.hit .step-vel {
    opacity: 0.8;
}

/* Rate reference */
.rate-reference {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 11px;
    color: var(--text-secondary);
}

.rate-item {
    background: var(--bg-dark);
    padding: 4px 8px;
    border-radius: 3px;
}

.rate-item strong {
    color: var(--accent);
    margin-right: 4px;
}

/* Line add button */
.line-controls button#add-line-btn {
    background: var(--bg-dark);
    border: 1px dashed var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
}

.line-controls button#add-line-btn:hover {
    background: var(--accent);
    border-style: solid;
    border-color: var(--accent);
    color: white;
}

/* Velocity tooltip on hover */
.euclidean-step[title] {
    position: relative;
}

/* Mode indicator in nav */
.nav-tab[data-mode-active="true"]::after {
    content: "●";
    margin-left: 6px;
    color: var(--success);
    font-size: 8px;
}

/* Rotate buttons */
.rotate-control {
    display: flex;
    align-items: center;
    gap: 4px;
}

.rotate-buttons {
    display: flex;
    gap: 2px;
}

.rotate-btn {
    width: 28px;
    height: 24px;
    padding: 0;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 3px;
    cursor: pointer;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.rotate-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.rotate-btn:active {
    transform: scale(0.95);
}