/* ============================================================================
 * THE TONE GENERATOR - RACK UNIT STYLING
 * Gunmetal/Slate theme with Bright Green (#00ff41) accents
 * Hardware synthesizer aesthetic
 * ============================================================================ */

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

:root {
    /* Rack Unit Color Scheme */
    --rack-bg: #1a1d21;
    --rack-panel: #252a2f;
    --rack-panel-light: #2d3339;
    --rack-border: #3a424a;
    --rack-border-dim: rgba(58, 66, 74, 0.5);
    
    /* Accent - Bright Green */
    --accent: #00ff41;
    --accent-dim: rgba(0, 255, 65, 0.3);
    --accent-glow: 0 0 10px rgba(0, 255, 65, 0.5);
    --accent-glow-strong: 0 0 20px rgba(0, 255, 65, 0.8);
    
    /* Display Colors */
    --display-bg: #0a0c0e;
    --display-text: #00ff41;
    --display-dim: rgba(0, 255, 65, 0.4);
    
    /* Text */
    --text-primary: #e0e0e0;
    --text-secondary: #889099;
    --text-dim: #5a6269;
    
    /* Alerts */
    --panic-red: #ff3333;
    --panic-glow: 0 0 15px rgba(255, 51, 51, 0.8);
    --record-red: #ff4444;
    
    /* Hardware */
    --screw-color: #6a737c;
    --screw-slot: #3a424a;
    --metal-highlight: #4a525c;
}

body {
    font-family: 'Courier New', Courier, monospace;
    background: var(--rack-bg);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 0;
    line-height: 1.4;
}

/* ============================================================================
 * HEADER / RACK HEADER
 * ============================================================================ */

.rack-header {
    background: linear-gradient(180deg, var(--rack-panel) 0%, var(--rack-bg) 100%);
    border-bottom: 2px solid var(--rack-border);
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    position: relative;
}

.rack-header::before,
.rack-header::after {
    content: '';
    position: absolute;
    top: 10px;
    width: 20px;
    height: 20px;
    background: 
        radial-gradient(circle at 30% 30%, var(--metal-highlight) 0%, var(--screw-color) 50%, var(--screw-slot) 100%);
    border-radius: 50%;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.5);
}

.rack-header::before {
    left: 15px;
}

.rack-header::after {
    right: 15px;
}

.rack-title {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.rack-title h1 {
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 3px;
    text-shadow: var(--accent-glow);
    margin: 0;
}

.rack-title .version {
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 1px;
}

/* Power / MIDI Controls */
.power-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.power-btn {
    font-size: 0.85rem;
    padding: 12px 30px;
    border: 2px solid var(--rack-border);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-family: inherit;
    background: var(--rack-panel);
    color: var(--text-secondary);
    position: relative;
    overflow: hidden;
}

.power-btn::before {
    content: '⏻';
    margin-right: 8px;
}

.power-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

.power-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
    box-shadow: var(--accent-glow-strong);
    animation: power-pulse 2s infinite;
}

@keyframes power-pulse {
    0%, 100% { box-shadow: 0 0 10px rgba(0, 255, 65, 0.5); }
    50% { box-shadow: 0 0 20px rgba(0, 255, 65, 0.9); }
}

.midi-toggle-btn {
    font-size: 0.75rem;
    padding: 10px 20px;
    border: 2px solid var(--rack-border);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-family: inherit;
    background: var(--rack-panel);
    color: var(--text-secondary);
}

.midi-toggle-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

.midi-toggle-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
    box-shadow: var(--accent-glow);
}

/* ============================================================================
 * MAIN RACK CONTAINER
 * ============================================================================ */

.rack-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

/* ============================================================================
 * OSCILLATOR MODULES (RACK PANELS)
 * ============================================================================ */

.oscillator-rack {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-bottom: 20px;
    border: 2px solid var(--rack-border);
    border-radius: 4px;
    overflow: hidden;
}

.osc-module {
    background: var(--rack-panel);
    border-right: 1px solid var(--rack-border-dim);
    padding: 15px;
    position: relative;
    min-height: 500px;
}

.osc-module:last-child {
    border-right: none;
}

/* Rack Screws */
.osc-module::before,
.osc-module::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    background: 
        linear-gradient(90deg, transparent 45%, var(--screw-slot) 45%, var(--screw-slot) 55%, transparent 55%),
        radial-gradient(circle at 30% 30%, var(--metal-highlight) 0%, var(--screw-color) 40%, var(--screw-slot) 100%);
    border-radius: 50%;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.6), 0 1px 1px rgba(255,255,255,0.1);
}

.osc-module::before { top: 8px; left: 8px; }
.osc-module::after { top: 8px; right: 8px; }

.osc-module .screw-bl { 
    bottom: 8px; 
    left: 8px; 
    position: absolute; 
    width: 14px; 
    height: 14px;
    background: 
        linear-gradient(90deg, transparent 45%, var(--screw-slot) 45%, var(--screw-slot) 55%, transparent 55%),
        radial-gradient(circle at 30% 30%, var(--metal-highlight) 0%, var(--screw-color) 40%, var(--screw-slot) 100%);
    border-radius: 50%;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.6), 0 1px 1px rgba(255,255,255,0.1);
}
.osc-module .screw-br { 
    bottom: 8px; 
    right: 8px; 
    position: absolute; 
    width: 14px; 
    height: 14px;
    background: 
        linear-gradient(90deg, transparent 45%, var(--screw-slot) 45%, var(--screw-slot) 55%, transparent 55%),
        radial-gradient(circle at 30% 30%, var(--metal-highlight) 0%, var(--screw-color) 40%, var(--screw-slot) 100%);
    border-radius: 50%;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.6), 0 1px 1px rgba(255,255,255,0.1);
}

/* Module Header */
.osc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--rack-border-dim);
}

.osc-header h3 {
    font-size: 0.85rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0;
}

.power-led {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--rack-border);
    border: 1px solid var(--screw-slot);
    transition: all 0.2s;
    cursor: pointer;
}

.power-led:hover {
    border-color: var(--accent-dim);
}

.power-led.active {
    background: var(--accent);
    box-shadow: var(--accent-glow-strong);
}

/* ============================================================================
 * DIGITAL DISPLAY
 * ============================================================================ */

.digital-display {
    background: var(--display-bg);
    border: 2px solid var(--rack-border);
    border-radius: 4px;
    padding: 15px 10px;
    text-align: center;
    margin-bottom: 15px;
    position: relative;
    box-shadow: inset 0 2px 8px rgba(0,0,0,0.8);
}

.display-main {
    font-size: 2rem;
    color: var(--display-text);
    font-weight: bold;
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(0, 255, 65, 0.6);
    line-height: 1;
    margin-bottom: 5px;
}

.display-sub {
    font-size: 0.85rem;
    color: var(--display-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.display-unit {
    font-size: 0.7rem;
    color: var(--display-dim);
    margin-top: 3px;
}

.digital-display::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(0,255,65,0.03) 0%, transparent 50%);
    pointer-events: none;
    border-radius: 2px;
}

/* ============================================================================
 * HOLD BUTTONS (Frequency & Parameter Controls)
 * ============================================================================ */

.hold-buttons {
    display: flex;
    gap: 4px;
    margin-bottom: 15px;
}

.hold-btn {
    flex: 1;
    padding: 12px 4px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.1s;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
}

.hold-btn:hover {
    background: var(--rack-border);
    color: var(--text-primary);
    border-color: var(--accent-dim);
}

.hold-btn:active,
.hold-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
    box-shadow: var(--accent-glow);
}

.hold-btn.fast {
    font-size: 0.75rem;
}

/* Parameter Row */
.param-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    padding: 8px;
    background: rgba(0,0,0,0.2);
    border-radius: 3px;
    border: 1px solid var(--rack-border-dim);
    position: relative;
}

.param-label {
    flex: 0 0 60px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.param-value {
    flex: 1;
    font-size: 0.85rem;
    color: var(--accent);
    text-align: center;
    font-weight: bold;
    font-family: 'Courier New', monospace;
}

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

.param-btn {
    width: 28px;
    height: 28px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.param-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

.param-btn:active,
.param-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
}

/* ============================================================================
 * WAVEFORM SELECTOR
 * ============================================================================ */

.waveform-control {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
    padding: 10px;
    background: rgba(0,0,0,0.2);
    border-radius: 3px;
    border: 1px solid var(--rack-border-dim);
}

.waveform-btn {
    width: 32px;
    height: 32px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.waveform-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

.waveform-btn:active {
    background: var(--accent);
    color: var(--rack-bg);
}

.waveform-display {
    flex: 1;
    text-align: center;
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================================================
 * SECONDARY CONTROLS (Binaural, FM, Granular, etc.)
 * ============================================================================ */

.secondary-controls {
    margin-top: 10px;
    margin-bottom: 15px;
}

.secondary-controls .param-row {
    margin-bottom: 8px;
    padding: 6px 8px;
}

.secondary-controls .param-label {
    flex: 0 0 70px;
    font-size: 0.65rem;
}

.secondary-controls .param-value {
    font-size: 0.8rem;
}

.secondary-controls .param-btn {
    width: 24px;
    height: 24px;
    font-size: 0.8rem;
}

.noise-type-btn {
    flex: 1;
    padding: 6px 4px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.65rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}

.noise-type-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

.noise-type-btn:active {
    background: var(--accent);
    color: var(--rack-bg);
}

/* ============================================================================
 * PRESET SLOTS
 * ============================================================================ */

.preset-slots {
    display: flex;
    gap: 6px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--rack-border-dim);
}

.preset-slot {
    flex: 1;
    padding: 8px 4px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 0.65rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.preset-slot:hover {
    border-color: var(--accent-dim);
    color: var(--text-secondary);
}

.preset-slot.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
    box-shadow: var(--accent-glow);
}

.preset-slot.saving {
    animation: save-flash 0.5s ease;
}

@keyframes save-flash {
    0%, 100% { background: var(--rack-panel-light); }
    50% { background: var(--accent); color: var(--rack-bg); }
}

/* ============================================================================
 * LFO MODULATION BUTTONS AND PANELS
 * ============================================================================ */

.mod-btn {
    width: 32px;
    height: 28px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 0.55rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 4px;
    padding: 0;
}

.mod-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-secondary);
}

.mod-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
    box-shadow: var(--accent-glow);
}

/* Frequency MOD button in hold-buttons container */
.freq-mod-btn {
    width: 36px;
    height: auto;
    padding: 12px 2px;
    font-size: 0.6rem;
    flex: 0 0 auto;
}

.mod-panel-rack {
    position: absolute;
    top: 100%;
    right: 0;
    z-index: 100;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    padding: 12px;
    min-width: 200px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

.mod-panel-header {
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--rack-border-dim);
}

.mod-panel-row {
    margin-bottom: 10px;
}

.mod-panel-row:last-child {
    margin-bottom: 0;
}

.mod-lfo-select {
    width: 100%;
    padding: 8px;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.8rem;
}

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

.range-row {
    display: flex;
    gap: 10px;
}

.range-col {
    flex: 1;
}

.range-col label {
    display: block;
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 4px;
}

.range-col input {
    width: 100%;
    padding: 6px;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--accent);
    font-family: inherit;
    font-size: 0.8rem;
}

.range-col input:focus {
    outline: none;
    border-color: var(--accent);
}

.mod-panel-btn {
    padding: 8px 16px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-right: 8px;
}

.mod-panel-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

.mod-panel-btn.assign {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
}

.mod-panel-btn.assign:hover {
    box-shadow: var(--accent-glow);
}

.mod-panel-btn.unassign {
    background: var(--panic-red);
    color: white;
    border-color: var(--panic-red);
}

/* ============================================================================
 * EFFECTS RACK
 * ============================================================================ */

.effects-rack {
    background: var(--rack-panel);
    border: 2px solid var(--rack-border);
    border-radius: 4px;
    margin-bottom: 20px;
    overflow: hidden;
}

.effects-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: var(--rack-bg);
    border-bottom: 1px solid var(--rack-border);
}

.effects-header h3 {
    font-size: 0.9rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0;
}

.effect-chain-list {
    padding: 10px;
}

.effect-chain-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--rack-border-dim);
    border-radius: 3px;
    margin-bottom: 8px;
    transition: all 0.2s;
}

.effect-chain-item:hover {
    border-color: var(--rack-border);
}

.effect-chain-item.active {
    border-color: var(--accent-dim);
}

.chain-number {
    width: 24px;
    height: 24px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: var(--text-dim);
    font-weight: bold;
}

.effect-chain-item.active .chain-number {
    color: var(--accent);
    border-color: var(--accent-dim);
}

.chain-reorder {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.chain-btn {
    width: 18px;
    height: 14px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    color: var(--text-dim);
    font-size: 0.6rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.chain-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

.effect-name {
    flex: 1;
    font-size: 0.8rem;
    color: var(--text-primary);
}

.effect-kill-btn {
    padding: 6px 12px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 0.65rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}

.effect-kill-btn:hover {
    border-color: var(--panic-red);
    color: var(--panic-red);
}

.effect-kill-btn.killed {
    background: var(--panic-red);
    color: white;
    border-color: var(--panic-red);
}

.effect-expand-btn {
    width: 28px;
    height: 28px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
}

.effect-expand-btn:hover {
    border-color: var(--accent-dim);
}

.effect-params-expanded {
    margin-top: 10px;
    padding: 15px;
    background: var(--rack-bg);
    border-radius: 3px;
    display: none;
}

.effect-params-expanded.open {
    display: block;
}

/* ============================================================================
 * MASTER SECTION
 * ============================================================================ */

.master-rack {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr;
    gap: 0;
    background: var(--rack-panel);
    border: 2px solid var(--rack-border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 20px;
}

.master-module {
    padding: 20px;
    border-right: 1px solid var(--rack-border-dim);
    position: relative;
}

.master-module:last-child {
    border-right: none;
}

.master-module h3 {
    font-size: 0.85rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0 0 15px 0;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--rack-border-dim);
}

/* VU Meter */
.vu-meter {
    display: flex;
    gap: 8px;
    height: 30px;
    margin-bottom: 15px;
}

.vu-channel {
    flex: 1;
    display: flex;
    gap: 2px;
}

.vu-segment {
    flex: 1;
    background: var(--rack-bg);
    border-radius: 1px;
    transition: background 0.05s;
}

.vu-segment.green.active { background: var(--accent); box-shadow: var(--accent-glow); }
.vu-segment.yellow.active { background: #ffcc00; box-shadow: 0 0 5px #ffcc00; }
.vu-segment.red.active { background: var(--panic-red); box-shadow: var(--panic-glow); }

/* Panic Button */
.panic-btn {
    width: 100%;
    padding: 20px;
    background: var(--rack-panel-light);
    border: 2px solid var(--rack-border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-top: 10px;
}

.panic-btn:hover {
    border-color: var(--panic-red);
    color: var(--panic-red);
    background: rgba(255, 51, 51, 0.1);
}

.panic-btn:active {
    background: var(--panic-red);
    color: white;
    box-shadow: var(--panic-glow);
}

/* Record Controls */
.record-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.rec-btn {
    padding: 12px 20px;
    background: var(--rack-panel-light);
    border: 2px solid var(--rack-border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}

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

.rec-btn.record:hover {
    background: var(--record-red);
    color: white;
}

.rec-btn.record.recording {
    background: var(--record-red);
    color: white;
    animation: rec-pulse 1s infinite;
}

@keyframes rec-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Record button in master chain */
.record-btn {
    background: transparent;
    border: 2px solid var(--record-red);
    color: var(--record-red);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.record-btn:hover {
    background: var(--record-red);
    color: white;
}

.record-btn.recording {
    background: var(--record-red);
    color: white;
    animation: rec-pulse 1s infinite;
}

.rec-timer {
    font-size: 1.2rem;
    color: var(--accent);
    font-family: 'Courier New', monospace;
    min-width: 60px;
    text-align: center;
}

/* ============================================================================
 * SEQUENCER SECTION
 * ============================================================================ */

#sequencer-rack {
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    overflow: hidden;
}

.sequencer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--rack-border-dim);
}

.sequencer-header h3 {
    font-size: 0.9rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0;
}

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

.note-size-selector {
    display: flex;
    gap: 4px;
}

.size-btn {
    padding: 6px 10px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}

.size-btn:hover {
    border-color: var(--accent-dim);
}

.size-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
}

/* Session Save/Load */
.session-controls {
    display: flex;
    gap: 10px;
}

.session-btn {
    padding: 8px 16px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.session-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

/* Sequencer Grid */
.sequencer-grid-rack {
    display: flex;
    gap: 15px;
}

.seq-row-labels-rack {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-top: 30px;
}

.seq-label-rack {
    height: 28px;
    display: flex;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    padding-right: 10px;
}

.seq-steps-rack {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.seq-row {
    display: flex;
    flex-direction: row;
    gap: 2px;
    flex-wrap: nowrap;
}

.seq-step-rack {
    width: 28px;
    height: 28px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.1s;
}

.seq-step-rack:hover {
    border-color: var(--accent-dim);
}

.seq-step-rack.active {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: var(--accent-glow);
}

.seq-step-rack.current {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 1px var(--text-primary);
}

.seq-step-rack.active.current {
    background: var(--accent);
    box-shadow: var(--accent-glow), 0 0 0 1px var(--text-primary);
}

/* Beat indicators for each row */
.seq-row[data-row="0"] .seq-step-rack.active { background: #ff4444; border-color: #ff4444; }
.seq-row[data-row="1"] .seq-step-rack.active { background: #ff8844; border-color: #ff8844; }
.seq-row[data-row="2"] .seq-step-rack.active { background: #ffcc44; border-color: #ffcc44; }
.seq-row[data-row="3"] .seq-step-rack.active { background: #88ff44; border-color: #88ff44; }
.seq-row[data-row="4"] .seq-step-rack.active { background: #44ff88; border-color: #44ff88; }
.seq-row[data-row="5"] .seq-step-rack.active { background: #44ccff; border-color: #44ccff; }
.seq-row[data-row="6"] .seq-step-rack.active { background: #8844ff; border-color: #8844ff; }
.seq-row[data-row="7"] .seq-step-rack.active { background: #ff44cc; border-color: #ff44cc; }
.seq-row[data-row="8"] .seq-step-rack.active { background: #cccccc; border-color: #cccccc; }

/* ============================================================================
 * FOOTER
 * ============================================================================ */

.rack-footer {
    background: var(--rack-panel);
    border-top: 2px solid var(--rack-border);
    padding: 30px 20px;
    margin-top: 40px;
}

.rack-footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 0.8rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0 0 15px 0;
}

.footer-col p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-bottom {
    max-width: 1200px;
    margin: 30px auto 0;
    padding-top: 20px;
    border-top: 1px solid var(--rack-border);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-dim);
}

/* ============================================================================
 * RESPONSIVE
 * ============================================================================ */

@media (max-width: 1200px) {
    .oscillator-rack {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .master-rack {
        grid-template-columns: 1fr;
    }
    
    .master-module {
        border-right: none;
        border-bottom: 1px solid var(--rack-border-dim);
    }
    
    .rack-footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .oscillator-rack {
        grid-template-columns: 1fr;
    }
    
    .rack-header {
        flex-direction: column;
        gap: 15px;
    }
    
    .power-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* ============================================================================
 * UTILITY / HIDDEN
 * ============================================================================ */

.hidden {
    display: none !important;
}

.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* Alpha Banner */
.alpha-banner {
    background: var(--rack-panel);
    border-bottom: 1px solid var(--rack-border);
    color: var(--accent);
    text-align: center;
    padding: 10px;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

.alpha-banner strong {
    text-transform: uppercase;
}

/* ============================================================================
 * LFO RACK MODULES
 * ============================================================================ */

.lfo-rack-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-top: none;
}

.lfo-module {
    background: var(--rack-panel);
    border-right: 1px solid var(--rack-border-dim);
    padding: 15px;
    position: relative;
    min-height: 280px;
}

.lfo-module:last-child {
    border-right: none;
}

.lfo-module .screw-bl,
.lfo-module .screw-br {
    position: absolute;
    width: 12px;
    height: 12px;
    background: 
        linear-gradient(90deg, transparent 45%, var(--screw-slot) 45%, var(--screw-slot) 55%, transparent 55%),
        radial-gradient(circle at 30% 30%, var(--metal-highlight) 0%, var(--screw-color) 40%, var(--screw-slot) 100%);
    border-radius: 50%;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.6), 0 1px 1px rgba(255,255,255,0.1);
}

.lfo-module .screw-bl { bottom: 8px; left: 8px; }
.lfo-module .screw-br { bottom: 8px; right: 8px; }

.lfo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--rack-border-dim);
}

.lfo-header h4 {
    font-size: 0.9rem;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0;
}

.lfo-meter-container {
    width: 20px;
    height: 30px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    position: relative;
    overflow: hidden;
}

.lfo-meter {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to top, var(--accent-dim), var(--accent));
    transition: height 0.05s ease;
}

.lfo-param {
    margin-bottom: 15px;
}

.lfo-param label {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.lfo-param label span {
    color: var(--accent);
    font-family: var(--font-display);
}

.lfo-rate,
.lfo-depth {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--rack-bg);
    border-radius: 3px;
    outline: none;
}

.lfo-rate::-webkit-slider-thumb,
.lfo-depth::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    cursor: pointer;
}

.lfo-rate::-webkit-slider-thumb:hover,
.lfo-depth::-webkit-slider-thumb:hover {
    border-color: var(--accent-dim);
}

.lfo-waveform {
    width: 100%;
    padding: 8px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.75rem;
    cursor: pointer;
}

.lfo-waveform:focus {
    outline: none;
    border-color: var(--accent);
}

/* ============================================================================
 * MIXER SECTION
 * ============================================================================ */

#mixer-rack .mixer-section {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 30px;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
}

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

.mixer-channel label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.mixer-fader {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 24px;
    background: transparent;
}

.mixer-fader::-webkit-slider-runnable-track {
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    height: 8px;
}

.mixer-fader::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 30px;
    height: 20px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    cursor: pointer;
    margin-top: -6px;
}

.mixer-fader::-webkit-slider-thumb:hover {
    border-color: var(--accent-dim);
}

.mixer-fader.master-fader::-webkit-slider-thumb {
    background: var(--accent-dim);
    border-color: var(--accent);
}

.mixer-meter {
    width: 100%;
    height: 6px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    position: relative;
    overflow: hidden;
}

.mixer-meter::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: linear-gradient(to right, var(--accent-dim), var(--accent));
    transition: width 0.1s ease;
}

.mixer-channel.master label {
    color: var(--accent);
}

/* ============================================================================
 * LFO MODULATION SECTION (LFO 4 & 5)
 * ============================================================================ */

.lfo-mod-section {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--rack-border-dim);
}

.lfo-mod-target {
    margin-bottom: 8px;
}

.lfo-mod-target:last-child {
    margin-bottom: 0;
}

.lfo-mod-target label {
    display: block;
    font-size: 0.6rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 3px;
}

.lfo-mod-rate-target,
.lfo-mod-depth-target {
    width: 100%;
    padding: 6px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.7rem;
    cursor: pointer;
}

.lfo-mod-rate-target:focus,
.lfo-mod-depth-target:focus {
    outline: none;
    border-color: var(--accent);
}

.lfo-mod-rate-target option,
.lfo-mod-depth-target option {
    background: var(--rack-panel);
    color: var(--text-primary);
}

/* Highlight LFO 4 & 5 modules */
.lfo-module.lfo-mod-source {
    background: linear-gradient(to bottom, var(--rack-panel), rgba(74, 222, 128, 0.05));
}

.lfo-module.lfo-mod-source .lfo-header h4 {
    color: var(--accent);
}

/* ============================================================================
 * SEQUENCER RACK SECTION
 * ============================================================================ */

.sequencer-controls-bar {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 15px 20px;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
    flex-wrap: wrap;
}

.seq-control-btn {
    padding: 10px 20px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.2s;
}

.seq-control-btn:hover {
    border-color: var(--accent-dim);
}

.seq-control-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
    box-shadow: var(--accent-glow);
}

.seq-divisions {
    display: flex;
    gap: 4px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    padding: 4px;
}

.seq-div-btn {
    padding: 6px 10px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 2px;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 0.65rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    min-width: 32px;
}

.seq-div-btn:hover {
    color: var(--text-primary);
    border-color: var(--rack-border);
}

.seq-div-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
}

.seq-tempo-control,
.seq-swing-control,
.seq-note-size {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.seq-tempo-control label,
.seq-swing-control label,
.seq-note-size label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.seq-tempo-control label span,
.seq-swing-control label span {
    color: var(--accent);
    font-family: var(--font-display);
}

.seq-tempo-control input,
.seq-swing-control input {
    width: 100px;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--rack-bg);
    border-radius: 3px;
    outline: none;
}

.seq-tempo-control input::-webkit-slider-thumb,
.seq-swing-control input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    cursor: pointer;
}

.seq-note-size select {
    padding: 8px 12px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.75rem;
    cursor: pointer;
}

.seq-note-size select:focus {
    outline: none;
    border-color: var(--accent);
}

/* Sequencer Grid */
.sequencer-grid-container {
    display: flex;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
    padding: 20px;
    overflow-x: auto;
}

.seq-row-labels {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-right: 15px;
    border-right: 1px solid var(--rack-border-dim);
    margin-right: 15px;
    flex-shrink: 0;
}

.seq-label {
    height: 24px;
    display: flex;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

/* ============================================================================
 * SPECTRUM SECTION (Above Mixer)
 * ============================================================================ */

.spectrum-section {
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.spectrum-section canvas {
    width: 100%;
    max-width: 800px;
    height: 120px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
}

.vu-meter-master {
    display: flex;
    gap: 10px;
    justify-content: center;
}

/* ============================================================================
 * GLOBAL PRESETS SECTION
 * ============================================================================ */

#global-presets-rack .presets-content {
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
    padding: 20px;
}

#global-presets-rack .preset-slots {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--rack-border-dim);
}

#global-presets-rack .preset-slot {
    padding: 12px 24px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.2s;
}

#global-presets-rack .preset-slot:hover {
    border-color: var(--accent-dim);
}

#global-presets-rack .preset-slot.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
}

.user-presets-area h4 {
    font-size: 0.8rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

#user-presets-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
    min-height: 40px;
}

.preset-actions {
    display: flex;
    gap: 10px;
}

.preset-actions .session-btn {
    flex: 1;
}

/* ============================================================================
 * MASTER CONTROLS BAR
 * ============================================================================ */

.master-controls-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    padding: 15px 20px;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
}

.master-param {
    display: flex;
    align-items: center;
    gap: 10px;
}

.master-param .param-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.master-param .param-value {
    font-family: var(--font-display);
    color: var(--accent);
    font-size: 0.9rem;
    min-width: 40px;
}

.master-param .param-buttons {
    display: flex;
    gap: 4px;
}

.master-controls-bar .panic-btn {
    padding: 10px 30px;
    background: var(--rack-panel-light);
    border: 2px solid #ff4444;
    border-radius: 3px;
    color: #ff4444;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.2s;
}

.master-controls-bar .panic-btn:hover {
    background: #ff4444;
    color: var(--rack-bg);
    box-shadow: 0 0 20px rgba(255, 68, 68, 0.4);
}

/* ============================================================================
 * HORIZONTAL MIXER SECTION
 * ============================================================================ */

.mixer-section-horizontal {
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

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

.mixer-row label {
    width: 60px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    text-align: right;
    flex-shrink: 0;
}

.mixer-row input[type="range"] {
    flex: 1;
    min-width: 200px;
}

.mixer-row .mixer-meter {
    width: 100px;
    flex-shrink: 0;
}

.mixer-row.master-row label {
    color: var(--accent);
}

.mixer-row.master-row .mixer-meter::after {
    background: linear-gradient(to right, var(--accent-dim), var(--accent));
}

/* ============================================================================
 * MIXER STRIPS (Vertical faders side by side)
 * ============================================================================ */

.mixer-strips {
    display: flex;
    justify-content: center;
    gap: 30px;
    padding: 30px;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
}

.mixer-strip {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 50px;
}

.mixer-strip label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
}

.mixer-fader-vertical {
    -webkit-appearance: slider-vertical;
    appearance: slider-vertical;
    width: 40px;
    height: 150px;
    background: transparent;
}

.mixer-fader-vertical::-webkit-slider-runnable-track {
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    width: 8px;
}

.mixer-fader-vertical::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 30px;
    height: 24px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    cursor: pointer;
}

.mixer-fader-vertical::-webkit-slider-thumb:hover {
    border-color: var(--accent-dim);
}

.mixer-fader-vertical.master-fader::-webkit-slider-thumb {
    background: var(--accent-dim);
    border-color: var(--accent);
}

.mixer-meter-vertical {
    width: 8px;
    height: 60px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    position: relative;
    overflow: hidden;
}

.mixer-meter-vertical::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 0%;
    background: linear-gradient(to top, var(--accent-dim), var(--accent));
    transition: height 0.1s ease;
}

.mixer-strip.master-strip label {
    color: var(--accent);
}

.mixer-strip.master-strip .mixer-meter-vertical::after {
    background: linear-gradient(to top, var(--accent-dim), var(--accent));
}

/* ============================================================================
 * MASTER STRIP - Single Slim Horizontal Row
 * ============================================================================ */

.master-strip-container {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 8px;
    padding: 15px 20px;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
    overflow-x: auto;
}

/* VU Display */
.vu-display {
    display: flex;
    gap: 4px;
    padding: 8px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
}

.vu-display .vu-channel {
    display: flex;
    flex-direction: column-reverse;
    gap: 2px;
}

.vu-display .vu-segment {
    width: 12px;
    height: 8px;
    background: var(--rack-border);
    border-radius: 1px;
}

.vu-display .vu-segment.green.active { background: #44ff44; box-shadow: 0 0 4px #44ff44; }
.vu-display .vu-segment.yellow.active { background: #ffff44; box-shadow: 0 0 4px #ffff44; }
.vu-display .vu-segment.red.active { background: #ff4444; box-shadow: 0 0 4px #ff4444; }

/* Fader Strips */
.fader-strip {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    width: 40px;
    height: 140px;
    padding: 6px 2px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
}

.fader-strip label {
    font-size: 0.6rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
    white-space: nowrap;
}

/* Pro Mixer Style Custom Fader */
.custom-fader {
    width: 30px;
    height: 100px;
    position: relative;
    cursor: pointer;
    user-select: none;
}

.fader-track {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 6px;
    height: 100%;
    background: #121212;
    border: 1px solid #2a2a2a;
    border-radius: 3px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.8);
}

.fader-cap {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 26px;
    height: 18px;
    background: linear-gradient(to bottom, #555 0%, #333 50%, #222 100%);
    border: 1px solid #111;
    border-radius: 2px;
    box-shadow: 0 3px 6px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.1);
    cursor: grab;
}

.fader-cap:active {
    cursor: grabbing;
}

.fader-indicator {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 2px;
    background: var(--accent);
    box-shadow: 0 0 4px var(--accent);
}

/* Firefox styles */
.strip-fader::-moz-range-thumb {
    width: 22px;
    height: 14px;
    background: linear-gradient(180deg, #5a626c 0%, #3d4349 100%);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.strip-fader::-moz-range-track {
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    width: 6px;
}

.strip-fader::-webkit-slider-thumb:hover {
    border-color: var(--accent-dim);
}

.fader-strip.master-fader-strip label {
    color: var(--accent);
}

.master-fader::-webkit-slider-thumb {
    background: var(--accent-dim);
    border-color: var(--accent);
}

/* Panic Button */
.panic-btn-small {
    align-self: center;
    padding: 8px 16px;
    background: var(--rack-panel-light);
    border: 2px solid #ff4444;
    border-radius: 3px;
    color: #ff4444;
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 10px;
}

.panic-btn-small:hover {
    background: #ff4444;
    color: var(--rack-bg);
}

/* ============================================================================
 * EFFECTS CHAIN - Rack Style
 * ============================================================================ */

.effects-chain-container {
    display: flex;
    gap: 0;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-top: none;
    overflow-x: auto;
}

.effect-slot-rack {
    flex: 1;
    min-width: 180px;
    max-width: 220px;
    background: var(--rack-panel);
    border-right: 1px solid var(--rack-border-dim);
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
}

.effect-slot-rack:last-child {
    border-right: none;
}

.slot-number {
    position: absolute;
    top: 8px;
    left: 8px;
    font-size: 0.65rem;
    color: var(--text-dim);
    background: var(--rack-bg);
    padding: 2px 6px;
    border-radius: 2px;
}

.effect-type-select {
    width: 100%;
    padding: 10px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
    margin-top: 20px;
}

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

.effect-mix-control {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.effect-mix-control label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mix-knob {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--rack-bg);
    border-radius: 3px;
    outline: none;
}

.mix-knob::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 50%;
    cursor: pointer;
}

.effect-params {
    flex: 1;
    min-height: 80px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.slot-controls {
    display: flex;
    gap: 5px;
    justify-content: center;
}

.slot-btn {
    padding: 6px 10px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.65rem;
    cursor: pointer;
    transition: all 0.2s;
}

.slot-btn:hover {
    border-color: var(--accent-dim);
}

.slot-btn.kill {
    background: rgba(255, 68, 68, 0.1);
    border-color: #ff4444;
    color: #ff4444;
}

.slot-btn.kill:hover,
.slot-btn.kill.active {
    background: #ff4444;
    color: var(--rack-bg);
}

.slot-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ============================================================================
 * EFFECT PARAMETERS
 * ============================================================================ */

.effect-param-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.effect-param-row label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.effect-param-row input[type="range"] {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--rack-border);
    border-radius: 2px;
    outline: none;
}

.effect-param-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
}

.effect-param-row .param-val {
    font-size: 0.7rem;
    color: var(--accent);
    font-family: var(--font-display);
    text-align: right;
}

/* ============================================================================
 * EFFECT ASSIGN SELECTOR
 * ============================================================================ */

.effect-assign-select {
    width: 100%;
    padding: 6px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--accent);
    font-family: inherit;
    font-size: 0.75rem;
    cursor: pointer;
    margin-top: 20px;
}

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

.effect-assign-select option {
    background: var(--rack-panel);
    color: var(--text-primary);
}

/* ============================================================================
 * COMPACT OSCILLATOR MODULE
 * ============================================================================ */

.osc-module.compact {
    min-height: 340px;
    padding: 12px;
    position: relative;
}

/* Freq + Wave in one row */
.freq-wave-row {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

/* Display number inside freq display */
.digital-display-compact {
    flex: 1;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    padding: 10px 8px 8px 8px;
    text-align: center;
    position: relative;
}

.display-number {
    position: absolute;
    top: 4px;
    left: 6px;
    font-size: 0.65rem;
    color: var(--text-dim);
    font-weight: bold;
}

.digital-display-compact {
    display: flex;
    flex-direction: row;
    align-items: baseline;
    justify-content: center;
}

.digital-display-compact .display-main {
    font-family: var(--font-display);
    font-size: 2.2rem;
    color: var(--accent);
    line-height: 1;
    letter-spacing: 2px;
}

.digital-display-compact .display-unit {
    font-size: 0.85rem;
    color: var(--text-dim);
    text-transform: uppercase;
    margin-left: 5px;
}

.waveform-control-compact {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    padding: 4px;
}

.waveform-control-compact .waveform-display {
    font-size: 0.75rem;
    color: #e0e0e0 !important;
    min-width: 50px;
    text-align: center;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    background: transparent !important;
}

.waveform-control-compact .waveform-btn {
    padding: 4px 6px;
    font-size: 0.6rem;
}

/* Detune Control */
.detune-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
    padding: 6px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
}

.detune-label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.detune-knob {
    cursor: ns-resize;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.detune-knob .knob-bg {
    fill: none;
    stroke: var(--rack-border);
    stroke-width: 3;
}

.detune-knob .knob-value {
    fill: none;
    stroke: var(--accent);
    stroke-width: 3;
    transition: stroke-dashoffset 0.05s ease;
}

.detune-value {
    font-size: 0.7rem;
    color: var(--text-primary);
    margin-top: 2px;
}

.detune-unit {
    font-size: 0.6rem;
    color: var(--text-dim);
}

/* Glide Control */
.glide-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    margin-left: 8px;
    padding-left: 8px;
    border-left: 1px solid var(--rack-border);
}

.glide-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
}

.glide-toggle input {
    display: none;
}

.glide-label {
    font-size: 0.6rem;
    color: var(--text-dim);
    text-transform: uppercase;
}

.glide-toggle input:checked + .glide-label {
    color: var(--accent);
}

.glide-knob {
    cursor: ns-resize;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.glide-knob .knob-bg {
    fill: none;
    stroke: var(--rack-border);
    stroke-width: 2;
}

.glide-knob .knob-value {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2;
    transition: stroke-dashoffset 0.05s ease;
}

.glide-value {
    font-size: 0.6rem;
    color: var(--text-primary);
    margin-top: 1px;
}

/* Compact freq buttons */
.hold-buttons-compact {
    display: flex;
    gap: 4px;
    margin-bottom: 10px;
}

.hold-buttons-compact .hold-btn {
    flex: 1;
    padding: 6px 2px;
    font-size: 0.65rem;
}

/* Envelope grid - 4 cells in a row */
.env-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-bottom: 10px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    padding: 8px;
}

.env-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
}

.env-label {
    font-size: 0.7rem;
    color: var(--accent);
    font-weight: bold;
}

.env-val {
    font-family: var(--font-display);
    font-size: 0.8rem;
    color: var(--text-primary);
}

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

.param-btn.mini {
    padding: 2px 6px;
    font-size: 0.6rem;
}

/* Filter Section */
.filter-section {
    margin-top: 8px;
    margin-bottom: 10px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    padding: 8px;
}

.filter-header {
    font-size: 0.7rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
    text-align: center;
    font-weight: bold;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.filter-grid .rotary-knob {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    cursor: ns-resize;
}

/* Envelope Rotary Knobs */
.env-grid .rotary-knob {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    cursor: ns-resize;
}

.env-grid .rotary-knob-svg {
    transform: rotate(135deg); /* Start from bottom-left */
}

.env-grid .rotary-knob-bg {
    fill: none;
    stroke: var(--rack-border);
    stroke-width: 3;
    stroke-linecap: round;
}

.env-grid .rotary-knob-value {
    fill: none;
    stroke: var(--accent);
    stroke-width: 3;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.05s ease;
}

.env-grid .rotary-knob-value-display {
    font-family: var(--font-display);
    font-size: 0.65rem;
    color: var(--text-primary);
    line-height: 1;
}

.env-grid .rotary-knob-label {
    font-size: 0.65rem;
    color: var(--accent);
    font-weight: bold;
    line-height: 1;
}

/* Volume fader row */
.volume-row {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    padding: 8px;
    margin-bottom: 10px;
}

.vol-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    width: 40px;
}

.vol-fader {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--rack-bg);
    border-radius: 3px;
    outline: none;
}

.vol-fader::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
}

.vol-val {
    font-family: var(--font-display);
    font-size: 0.75rem;
    color: var(--accent);
    width: 40px;
    text-align: right;
}

/* Compact preset slots */
.osc-module.compact .preset-slots {
    display: flex;
    gap: 4px;
}

.osc-module.compact .preset-slot {
    flex: 1;
    padding: 6px;
    font-size: 0.65rem;
}

/* ============================================================================
 * MASTER VOLUME COMPACT WITH ON/OFF SWITCH
 * ============================================================================ */



.master-onoff-switch {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.master-onoff-switch input[type="checkbox"] {
    display: none;
}

.master-onoff-switch label {
    width: 36px;
    height: 20px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 10px;
    position: relative;
    cursor: pointer;
    font-size: 0.6rem;
    color: var(--text-dim);
    text-align: center;
    line-height: 18px;
    transition: all 0.2s;
}

.master-onoff-switch label::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    background: var(--text-dim);
    border-radius: 50%;
    transition: all 0.2s;
}

.master-onoff-switch input[type="checkbox"]:checked + label {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--rack-bg);
}

.master-onoff-switch input[type="checkbox"]:checked + label::before {
    left: 18px;
    background: var(--rack-bg);
}

.fader-strip.master-strip {
    width: 46px;
    border-color: var(--accent-dim);
}

.fader-strip.master-strip .master-onoff-switch {
    margin-top: 4px;
}

/* ============================================================================
 * COMPACT VOLUME + POWER SWITCH ROW
 * ============================================================================ */

.vol-power-row {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    padding: 8px;
    margin-bottom: 10px;
}

/* ON/OFF Toggle Switch */
.osc-power-switch {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.osc-power-switch input[type="checkbox"] {
    display: none;
}

.osc-power-switch label {
    width: 32px;
    height: 18px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 9px;
    position: relative;
    cursor: pointer;
    transition: all 0.2s;
}

.osc-power-switch label::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 12px;
    height: 12px;
    background: var(--text-dim);
    border-radius: 50%;
    transition: all 0.2s;
}

.osc-power-switch input[type="checkbox"]:checked + label {
    background: var(--accent-dim);
    border-color: var(--accent);
}

.osc-power-switch input[type="checkbox"]:checked + label::before {
    left: 16px;
    background: var(--accent);
}

/* Compact Volume Slider */
.vol-slider-compact {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 6px;
}

.vol-label-sm {
    font-size: 0.6rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    width: 20px;
}

.vol-fader-sm {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--rack-bg);
    border-radius: 3px;
    outline: none;
}

.vol-fader-sm::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
}

.vol-val-sm {
    font-family: var(--font-display);
    font-size: 0.7rem;
    color: var(--accent);
    width: 24px;
    text-align: right;
}

/* ============================================================================
 * COMPACT MOD BUTTON
 * ============================================================================ */

.hold-buttons-compact .mod-btn {
    padding: 6px 8px;
    font-size: 0.6rem;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.hold-buttons-compact .mod-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

.hold-buttons-compact .mod-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
}

/* Secondary control MOD buttons */
.sec-mod-btn {
    padding: 2px 6px;
    font-size: 0.55rem;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    color: var(--text-secondary);
    cursor: pointer;
}

.sec-mod-btn:hover {
    border-color: var(--accent-dim);
}

.sec-mod-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
}

/* ============================================================================
 * PER-OSCILLATOR EFFECTS & MASTER CHAIN - 2x2 GRID LAYOUT
 * ============================================================================ */

/* Per-Oscillator Effects - 2x2 Grid */
.osc-effects-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 12px;
    padding: 15px;
    height: 420px; /* Fixed height for consistency */
}

.osc-effect-group {
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.osc-effect-header {
    font-size: 0.7rem;
    font-weight: bold;
    color: var(--accent);
    text-align: center;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--rack-border);
    margin-bottom: 10px;
    letter-spacing: 1px;
    flex-shrink: 0;
}

.random-effects-btn {
    margin-top: 10px;
    padding: 6px 12px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 0.65rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
}

.random-effects-btn:hover {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
}

.osc-effect-slots {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-height: 0;
}

/* Effect slot - fills available height equally */
.osc-effect-slot {
    background: var(--rack-bg);
    border: 1px solid var(--rack-border-dim);
    border-radius: 4px;
    padding: 8px 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: border-color 0.2s;
    min-height: 36px;
}

.osc-effect-slot.active {
    border-color: var(--accent-dim);
    box-shadow: 0 0 5px var(--accent-dim) inset;
}

.osc-effect-slot .slot-label {
    font-size: 0.65rem;
    color: var(--text-dim);
    text-align: center;
    font-weight: bold;
    width: 16px;
    flex-shrink: 0;
}

.osc-effect-slot .effect-type-select {
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    color: var(--text-primary);
    padding: 4px 6px;
    font-size: 0.7rem;
    border-radius: 3px;
    cursor: pointer;
    height: 26px;
    width: 110px;
    flex-shrink: 0;
}

.osc-effect-slot .effect-type-select:focus {
    border-color: var(--accent-dim);
    outline: none;
}

/* Params area */
.osc-effect-slot .effect-params {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: flex-start;
    justify-content: center;
    flex: 1;
    min-width: 0;
    padding: 8px 4px;
    max-height: 140px;
    overflow-y: auto;
}

.osc-effect-slot .effect-param-row {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
    min-width: 0;
}

.osc-effect-slot .effect-param-row label {
    font-size: 0.55rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    white-space: nowrap;
}

.osc-effect-slot .effect-param-row input[type="range"] {
    flex: 1;
    min-width: 40px;
    height: 4px;
    background: var(--rack-border);
    border-radius: 2px;
    -webkit-appearance: none;
}

.osc-effect-slot .effect-param-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
}

.osc-effect-slot .effect-param-row .param-val {
    font-size: 0.55rem;
    color: var(--accent);
    min-width: 28px;
    text-align: right;
}

/* Controls */
.osc-effect-slot .slot-controls {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.osc-effect-slot .slot-btn {
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    color: var(--text-secondary);
    font-size: 0.55rem;
    padding: 2px 4px;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.2s;
    height: 18px;
    line-height: 1;
}

.osc-effect-slot .slot-btn:hover {
    border-color: var(--accent-dim);
    color: var(--text-primary);
}

.osc-effect-slot .slot-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.osc-effect-slot .slot-btn.kill {
    color: var(--panic-red);
    border-color: rgba(255, 51, 51, 0.3);
    font-size: 0.55rem;
}

.osc-effect-slot .slot-btn.kill:hover {
    background: rgba(255, 51, 51, 0.2);
}

.osc-effect-slot .slot-btn.kill.active {
    background: var(--panic-red);
    color: white;
    border-color: var(--panic-red);
}

/* Master Chain Row - Mixer Style Vertical Strips */
.master-chain-row {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 12px;
    padding: 15px 20px;
    border-top: 1px solid var(--rack-border);
    background: var(--rack-panel);
    min-height: 160px;
}

.master-chain-strip {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    width: 44px;
    height: 140px;
    padding: 6px 4px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
}

.master-chain-strip label {
    font-size: 0.55rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
    font-weight: bold;
}



.master-chain-fader::-webkit-slider-thumb:hover {
    border-color: var(--accent-dim);
    background: linear-gradient(180deg, #5a626c 0%, #3d4349 100%);
}

.master-chain-strip .chain-val {
    font-size: 0.5rem;
    color: var(--text-secondary);
    min-width: 30px;
    text-align: center;
}

/* VU Meter Strips */
.master-chain-strip.vu-strip {
    width: 28px;
    background: var(--rack-panel);
}

/* Waveform Visualizer */
.visualizer-container {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 15px auto;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 8px;
    padding: 10px;
}

#visualizer {
    width: 100%;
    height: 120px;
    background: var(--display-bg);
    border-radius: 4px;
    display: block;
}

.vis-toggle {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 6px 12px;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.2s;
}

.vis-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* VU Meter - Vertical for Master Chain */
.vu-meter-vertical {
    position: relative;
    width: 12px;
    height: 70px;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    display: flex;
    flex-direction: column-reverse;
    padding: 2px;
    gap: 1px;
}

.vu-segments {
    display: flex;
    flex-direction: column-reverse;
    gap: 1px;
    flex: 1;
}

.vu-seg {
    flex: 1;
    background: var(--rack-border);
    border-radius: 1px;
    transition: background-color 0.05s ease, box-shadow 0.05s ease;
    opacity: 0.3;
}

.vu-seg.active {
    opacity: 1;
    box-shadow: 0 0 4px currentColor;
}

.vu-seg.vu-green.active {
    background: var(--accent);
    color: var(--accent);
}

.vu-seg.vu-yellow.active {
    background: #ffcc00;
    color: #ffcc00;
}

.vu-seg.vu-red.active {
    background: var(--panic-red);
    color: var(--panic-red);
}

.vu-peak {
    position: absolute;
    top: 2px;
    left: 2px;
    right: 2px;
    height: 3px;
    background: var(--rack-border);
    border-radius: 1px;
    transition: background-color 0.1s ease;
}

.vu-peak.active {
    background: var(--panic-red);
    box-shadow: 0 0 6px var(--panic-red);
}

/* Pro Mixer Style - Fader Strips with Mute/Solo */
.fader-strip.osc-fader {
    width: 46px;
}

.fader-buttons {
    display: flex;
    gap: 3px;
    margin-top: 4px;
}

.fader-btn {
    width: 18px;
    height: 16px;
    font-size: 0.5rem;
    font-weight: bold;
    border: 1px solid var(--rack-border);
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
    line-height: 1;
}

.fader-btn.mute {
    background: var(--rack-panel-light);
    color: var(--text-secondary);
}

.fader-btn.mute:hover {
    border-color: #ff6666;
    color: #ff6666;
}

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

.fader-btn.solo {
    background: var(--rack-panel-light);
    color: var(--text-secondary);
}

.fader-btn.solo:hover {
    border-color: #ffcc00;
    color: #ffcc00;
}

.fader-btn.solo.active {
    background: #ffcc00;
    border-color: #ffcc00;
    color: black;
}

/* Responsive */
@media (max-width: 1200px) {
    .osc-effects-container {
        height: auto;
        min-height: 400px;
    }
    
    .master-chain-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .osc-effects-container {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .osc-effect-slot {
        grid-template-columns: 18px 100px 1fr auto;
    }
    
    .master-chain-container {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
 * ROTARY KNOBS
 * ============================================================================ */

.rotary-knob {
    position: relative;
    width: 40px;
    height: 40px;
    margin: 2px;
    cursor: pointer;
    user-select: none;
}

.rotary-knob-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-135deg);
}

.rotary-knob-bg {
    fill: none;
    stroke: var(--rack-border);
    stroke-width: 4;
}

.rotary-knob-value {
    fill: none;
    stroke: var(--accent);
    stroke-width: 4;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.1s;
}

.rotary-knob-indicator {
    fill: var(--accent);
}

.rotary-knob-label {
    position: absolute;
    bottom: -14px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.6rem;
    color: var(--text-secondary);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.rotary-knob-value-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.55rem;
    color: var(--accent);
    font-family: 'Courier New', monospace;
}

.effect-params-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    padding: 8px;
    min-height: 80px;
}

.effect-param-row {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.effect-params {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
    padding: 4px;
    min-height: 70px;
}

.osc-effect-slot {
    min-height: 120px;
}

/* Effect MOD and RAND buttons */
.slot-btn.mod {
    background: rgba(0, 255, 65, 0.2);
    border-color: var(--accent);
    color: var(--accent);
    font-size: 0.5rem;
    min-width: 28px;
}

.slot-btn.mod:hover,
.slot-btn.mod.active {
    background: var(--accent);
    color: var(--rack-bg);
}

.slot-btn.rand {
    background: rgba(212, 170, 96, 0.2);
    border-color: #d4aa60;
    color: #d4aa60;
    font-size: 0.5rem;
    min-width: 32px;
}

.slot-btn.rand:hover {
    background: #d4aa60;
    color: var(--rack-bg);
}

/* Effect Slot Restructured Layout */
.osc-effect-slot {
    display: flex;
    flex-direction: column;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-radius: 6px;
    padding: 8px;
    min-height: 160px;
}

.slot-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--rack-border);
}

.slot-header .slot-label {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--rack-panel-light);
    border-radius: 3px;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.slot-header .effect-type-select {
    flex: 1;
    background: var(--rack-bg);
    border: 1px solid var(--rack-border);
    color: var(--text-primary);
    padding: 4px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
}

.slot-header .slot-controls {
    display: flex;
    gap: 4px;
}

.osc-effect-slot .effect-params {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-content: flex-start;
    gap: 8px;
    flex: 1;
    min-height: 90px;
    overflow: visible;
}

/* Effect Slot Layout - Controls side by side, knobs below */
.osc-effect-slot {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 8px;
    padding: 8px;
}

.osc-effect-slot .slot-label {
    order: 1;
}

.osc-effect-slot .effect-type-select {
    order: 2;
    flex: 1;
    min-width: 100px;
}

.osc-effect-slot .slot-controls {
    order: 3;
    display: flex;
    gap: 4px;
}

.osc-effect-slot .effect-params {
    order: 4;
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    min-height: 90px;
}

/* Effect Slot Layout - Controls in row, knobs below */
.osc-effect-slot {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 6px;
    padding: 6px;
}

.osc-effect-slot .slot-label {
    order: 1;
}

.osc-effect-slot .effect-type-select {
    order: 2;
    flex: 1;
    min-width: 80px;
}

.osc-effect-slot .slot-controls {
    order: 3;
    display: flex;
    gap: 3px;
}

.osc-effect-slot .effect-params {
    order: 4;
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
    min-height: 85px;
}

/* Effect Slot Layout - Simple and clean */
.osc-effect-slot {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    padding: 8px;
}

/* Slot label, select, and controls in first row */
.osc-effect-slot .slot-label,
.osc-effect-slot .effect-type-select,
.osc-effect-slot .slot-controls {
    flex-shrink: 0;
}

.osc-effect-slot .effect-type-select {
    flex: 1;
    min-width: 100px;
}

.osc-effect-slot .slot-controls {
    display: flex;
    gap: 4px;
}

/* Effect params (rotary knobs) take full width on second row */
.osc-effect-slot .effect-params {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    min-height: 90px;
    padding-top: 4px;
}

/* Effect Slot - Dropdown top, buttons left, knobs right */
.osc-effect-slot {
    display: flex;
    flex-direction: column;
    padding: 8px;
    gap: 8px;
}

/* Dropdown on top */
.osc-effect-slot .effect-type-select {
    width: 100%;
}

/* Main content area - buttons left, knobs right */
.osc-effect-content {
    display: flex;
    gap: 10px;
}

/* Left side - vertical button stack */
.osc-effect-slot .slot-controls-vertical {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 45px;
    flex-shrink: 0;
}

.osc-effect-slot .slot-controls-vertical .slot-btn {
    width: 100%;
    padding: 4px 2px;
    font-size: 0.55rem;
}

/* Right side - rotary knobs grid */
.osc-effect-slot .effect-params-grid {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-content: flex-start;
}

/* Rotary knob with LFO button */
.rotary-knob-container {
    display: flex;
    align-items: center;
    gap: 4px;
}

.rotary-knob-container .mod-param-btn {
    width: 18px;
    height: 18px;
    padding: 0;
    font-size: 0.5rem;
    background: rgba(0, 255, 65, 0.15);
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 3px;
    cursor: pointer;
}

.rotary-knob-container .mod-param-btn:hover,
.rotary-knob-container .mod-param-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
}

/* Effect Slot - Dropdown top, buttons left, knobs right */
.osc-effect-slot {
    display: flex;
    flex-direction: column;
    padding: 8px;
    gap: 8px;
}

/* Dropdown on top */
.osc-effect-slot .effect-type-select {
    width: 100%;
}

/* Content wrapper - holds buttons (left) and knobs (right) */
.effect-content-wrapper {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

/* Left side - vertical button stack */
.slot-controls-vertical {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 50px;
    flex-shrink: 0;
}

.slot-controls-vertical .slot-btn {
    width: 100%;
    padding: 6px 2px;
    font-size: 0.55rem;
    text-align: center;
    border: 1px solid var(--rack-border);
    background: var(--rack-panel-light);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
}

.slot-controls-vertical .slot-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.slot-controls-vertical .slot-btn.kill {
    border-color: #ff4444;
    color: #ff4444;
}

.slot-controls-vertical .slot-btn.mod {
    border-color: var(--accent);
    color: var(--accent);
}

.slot-controls-vertical .slot-btn.rand {
    border-color: #d4aa60;
    color: #d4aa60;
}

/* Right side - rotary knobs grid */
.osc-effect-slot .effect-params {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-content: flex-start;
    min-height: 90px;
}

/* Knob container with LFO button */
.rotary-knob-container {
    display: flex;
    align-items: center;
    gap: 4px;
}

.rotary-knob {
    width: 40px;
    height: 40px;
}

.rotary-knob-label {
    font-size: 0.5rem;
    bottom: -12px;
}

.rotary-knob-value-display {
    font-size: 0.55rem;
}

.mod-param-btn {
    width: 16px;
    height: 40px;
    padding: 0;
    font-size: 0.5rem;
    background: rgba(0, 255, 65, 0.1);
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 3px;
    cursor: pointer;
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.mod-param-btn:hover,
.mod-param-btn.active {
    background: var(--accent);
    color: var(--rack-bg);
}

/* Knob row for Detune/Glide */
.knob-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
    padding: 6px;
    background: var(--rack-panel-light);
    border: 1px solid var(--rack-border);
    border-radius: 4px;
}

/* Compact rotary knobs for detune/glide */
.detune-knob-compact,
.glide-knob-compact {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: ns-resize;
    width: 40px;
}

.detune-knob-compact .rotary-knob-svg,
.glide-knob-compact .rotary-knob-svg {
    transform: rotate(135deg);
}

.detune-knob-compact .rotary-knob-bg,
.glide-knob-compact .rotary-knob-bg {
    fill: none;
    stroke: var(--rack-border);
    stroke-width: 3;
}

.detune-knob-compact .rotary-knob-value,
.glide-knob-compact .rotary-knob-value {
    fill: none;
    stroke: var(--accent);
    stroke-width: 3;
    transition: stroke-dashoffset 0.05s ease;
}

.detune-knob-compact .rotary-knob-value-display,
.glide-knob-compact .rotary-knob-value-display {
    font-size: 0.65rem;
    color: var(--text-primary);
    margin-top: 2px;
    font-weight: 600;
}

.detune-knob-compact .rotary-knob-label,
.glide-knob-compact .rotary-knob-label {
    font-size: 0.55rem;
    color: var(--text-dim);
    text-transform: uppercase;
    margin-top: 1px;
}

/* Compact glide toggle */
.glide-toggle-compact {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    padding-left: 8px;
    border-left: 1px solid var(--rack-border);
}

.glide-toggle-compact input {
    display: none;
}

.glide-toggle-label {
    font-size: 0.6rem;
    color: var(--text-dim);
    text-transform: uppercase;
    padding: 4px 8px;
    background: var(--rack-panel);
    border: 1px solid var(--rack-border);
    border-radius: 3px;
    transition: all 0.2s ease;
}

.glide-toggle-compact input:checked + .glide-toggle-label {
    background: var(--accent);
    color: var(--rack-bg);
    border-color: var(--accent);
}

/* Filter Envelope */
.filter-env-header {
    font-size: 0.65rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 10px;
    margin-bottom: 6px;
    text-align: center;
    font-weight: bold;
    border-top: 1px solid var(--rack-border);
    padding-top: 8px;
}

.filter-env-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.filter-env-grid .rotary-knob {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    cursor: ns-resize;
}

.filter-env-grid .rotary-knob-svg {
    transform: rotate(135deg);
}

.filter-env-grid .rotary-knob-bg {
    fill: none;
    stroke: var(--rack-border);
    stroke-width: 3;
}

.filter-env-grid .rotary-knob-value {
    fill: none;
    stroke: var(--accent);
    stroke-width: 3;
    transition: stroke-dashoffset 0.05s ease;
}

.filter-env-grid .rotary-knob-value-display {
    font-size: 0.6rem;
    color: var(--text-primary);
    font-weight: 600;
}

.filter-env-grid .rotary-knob-label {
    font-size: 0.55rem;
    color: var(--text-dim);
    text-transform: uppercase;
}