/* Custom CSS for Playable Double-Slit Synthesizer - Premium Glassmorphic Logo-Theme */

:root {
    --bg-base: #06090e;
    --bg-panel: rgba(10, 16, 26, 0.7);
    --border-color: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(0, 212, 255, 0.15);
    
    --neon-cyan: #00d4ff;
    --neon-cyan-glow: rgba(0, 212, 255, 0.35);
    
    --neon-blue: #0052ff;
    --neon-blue-glow: rgba(0, 82, 255, 0.35);
    
    --neon-orange: #ff8f1f;
    --neon-orange-glow: rgba(255, 143, 31, 0.35);
    
    --neon-red: #ff3b30;
    --neon-red-glow: rgba(255, 59, 48, 0.35);
    
    --neon-magenta: #ff00a0;
    --neon-magenta-glow: rgba(255, 0, 160, 0.35);
    
    --neon-green: #00ff9f;
    --neon-green-glow: rgba(0, 255, 159, 0.35);
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Background animated glow orbs */
.glow-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(140px);
    z-index: 0;
    opacity: 0.1;
    pointer-events: none;
}
.orb-1 {
    top: -200px;
    left: -100px;
    background: radial-gradient(circle, var(--neon-cyan) 0%, transparent 70%);
}
.orb-2 {
    bottom: -200px;
    right: -100px;
    background: radial-gradient(circle, var(--neon-orange) 0%, transparent 70%);
}

.synth-container {
    width: 1440px;
    max-width: 98vw;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 24px;
    backdrop-filter: blur(25px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 
                inset 0 0 20px rgba(255, 255, 255, 0.01);
    z-index: 1;
    position: relative;
}

/* Header Section */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.logo-sub {
    font-size: 14px;
    font-weight: 400;
    color: var(--neon-cyan);
    text-transform: uppercase;
    letter-spacing: 3px;
    text-shadow: 0 0 10px var(--neon-cyan-glow);
}

.midi-status {
    background: rgba(4, 6, 10, 0.85);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-muted);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.1);
}

.status-dot.active {
    background-color: var(--neon-green);
    box-shadow: 0 0 10px var(--neon-green-glow);
}

.status-dot.flash-red {
    background-color: var(--neon-red) !important;
    box-shadow: 0 0 12px var(--neon-red), 0 0 20px var(--neon-red) !important;
}

/* Tab Navigation Bar */
.tabs-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    padding-bottom: 12px;
}

.tab-btn {
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 12px;
    letter-spacing: 1.5px;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-btn:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15) 0%, rgba(255, 143, 31, 0.15) 100%);
    border-color: var(--neon-cyan);
    color: var(--text-primary);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Tab Content Transitions */
.tab-content {
    display: none;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.tab-content.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Page Layout Grids */
.engine-layout {
    display: grid;
    grid-template-columns: 200px 2.2fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.matrix-fx-row {
    display: flex;
    gap: 16px;
    margin-top: 14px;
}

@media (max-width: 900px) {
    .matrix-fx-row {
        flex-direction: column !important;
    }
}

.seq-arp-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.effects-layout {
    display: grid;
    grid-template-columns: 460px 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

/* Double-slit Wave Diffraction visualizer */
.physics-visualizer-panel {
    background: rgba(4, 6, 12, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    padding: 16px;
    margin-top: 14px;
}

/* Panels */
.panel {
    background: rgba(4, 6, 12, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.panel-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-primary);
    border-left: 3px solid var(--neon-cyan);
    padding-left: 8px;
    margin-bottom: 4px;
}

.panel-title.purple { border-left-color: var(--neon-orange); } /* Replaced purple with orange */
.panel-title.magenta { border-left-color: var(--neon-magenta); }
.panel-title.green { border-left-color: var(--neon-green); }

/* Vertical Sliders and Controls */
.vertical-sliders-row {
    display: flex;
    gap: 10px;
    justify-content: center;
    width: 100%;
    padding: 4px 0;
}

.vertical-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    height: 155px;
    width: 54px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.01);
    border-radius: 8px;
    padding: 8px 2px;
    transition: border-color 0.2s, background-color 0.2s;
}

.vertical-control:hover {
    border-color: rgba(255, 255, 255, 0.05);
    background: rgba(0, 0, 0, 0.4);
}

.vertical-control .control-label {
    font-size: 9px;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-align: center;
    font-weight: 700;
    letter-spacing: 0.5px;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.vertical-control .control-value {
    font-size: 9px;
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text-primary);
    opacity: 0.8;
    font-weight: 600;
    text-align: center;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
}

/* Custom Styled Range Input (Vertical) */
.slider-vertical {
    -webkit-appearance: none;
    writing-mode: vertical-lr;
    direction: rtl;
    width: 4px !important;
    height: 90px !important;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    margin: 6px auto;
    transition: background-color 0.2s;
}

.slider-vertical:hover {
    background: rgba(255, 255, 255, 0.08);
}

.slider-vertical::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-primary);
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: transform 0.1s, background-color 0.2s;
}

.slider-vertical::-webkit-slider-thumb:hover {
    transform: scale(1.25);
    background: var(--neon-cyan);
    box-shadow: 0 0 8px var(--neon-cyan-glow);
}

/* Thumb colors based on context */
.slider-cyan::-webkit-slider-thumb {
    background: var(--neon-cyan);
    box-shadow: 0 0 8px var(--neon-cyan-glow);
}
.slider-orange::-webkit-slider-thumb {
    background: var(--neon-orange);
    box-shadow: 0 0 8px var(--neon-orange-glow);
}
.slider-red::-webkit-slider-thumb {
    background: var(--neon-red);
    box-shadow: 0 0 8px var(--neon-red-glow);
}
.slider-magenta::-webkit-slider-thumb {
    background: var(--neon-magenta);
    box-shadow: 0 0 8px var(--neon-magenta-glow);
}

/* Active Source Editor Subtabs styling */
.source-editor-panel {
    min-height: 250px;
}

.subtabs-nav {
    display: flex;
    gap: 4px;
    background: rgba(0, 0, 0, 0.3);
    padding: 3px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

.subtab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 8px 4px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.subtab-btn:hover {
    color: var(--text-primary);
}

.subtab-btn.active {
    background: rgba(255, 255, 255, 0.04);
    color: var(--neon-cyan);
    border: 1px solid rgba(0, 212, 255, 0.15);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.subtab-content {
    display: none;
    height: 100%;
}

.subtab-content.active {
    display: block;
}

.source-content-grid {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 16px;
    height: 100%;
    align-items: start;
}

.settings-block {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Buttons Selectors */
.selector-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
    background: rgba(0, 0, 0, 0.3);
    padding: 3px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

.wave-selector {
    grid-template-columns: repeat(5, 1fr);
}

.selector-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 6px 2px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.selector-btn:hover {
    color: var(--text-primary);
}

.selector-btn.active {
    background: rgba(255, 255, 255, 0.05);
    color: var(--neon-cyan);
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.control-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.control-label {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Shaping & ADSR Grid Layout */
.global-shaping-grid {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.lfo-module {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    padding-top: 12px;
}

/* Step Sequencer Layout */
.steps-container {
    display: flex;
    justify-content: space-between;
    gap: 8px;
}

.step-card {
    flex: 1;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    padding: 10px 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.step-card:hover {
    border-color: rgba(0, 212, 255, 0.12);
    background: rgba(0, 0, 0, 0.4);
}

.step-led {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--text-muted);
    transition: background-color 0.05s, box-shadow 0.05s;
}

.step-led.active {
    background-color: var(--neon-green);
    box-shadow: 0 0 8px var(--neon-green-glow);
}

.step-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    font-size: 10px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.2s ease;
}

.step-btn:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.15);
}

.step-btn.active {
    background: var(--neon-cyan);
    color: var(--bg-base);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-cyan-glow);
}

.step-semitones {
    -webkit-appearance: none;
    writing-mode: vertical-lr;
    direction: rtl;
    width: 4px;
    height: 64px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    margin: 4px 0;
}

.step-semitones::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-primary);
    box-shadow: 0 0 4px rgba(255, 255, 255, 0.3);
    cursor: pointer;
}

.step-semitones::-webkit-slider-thumb:hover {
    background: var(--neon-cyan);
    box-shadow: 0 0 8px var(--neon-cyan-glow);
}

.step-val {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 10px;
    font-weight: 700;
    color: var(--text-secondary);
}

.step-card:hover .step-val {
    color: var(--neon-cyan);
}

/* Master FX and Presets Layout */
.fx-presets-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.presets-block {
    background: rgba(0, 0, 0, 0.2);
    padding: 12px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.01);
}

/* Top-level Visualizers Panel */
.visualizers-panel {
    width: 100%;
    margin-bottom: 12px;
}

.visualizers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    width: 100%;
}

.visualizer-card {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
}

.vis-title {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-secondary);
    width: 100%;
    text-align: left;
    font-weight: 700;
}

.visualizers-panel canvas {
    background: rgba(4, 5, 8, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    width: 100%;
    height: 110px; /* full high-resolution height */
    display: block;
}

/* Preset Browser (Inside tab page) */
.browser-panel {
    background: rgba(4, 6, 12, 0.5);
    padding: 20px;
}

.search-input {
    width: 100%;
    padding: 10px 16px;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    font-family: 'Outfit', sans-serif;
    transition: all 0.2s ease;
}

.search-input:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-cyan-glow);
    background: rgba(0, 0, 0, 0.65);
}

.category-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 6px;
}

.tag-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 6px 12px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tag-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.tag-btn.active {
    background: var(--neon-cyan);
    color: var(--bg-base);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 8px var(--neon-cyan-glow);
}

.preset-scroll-container {
    max-height: 380px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-right: 4px;
    margin-top: 12px;
}

/* Custom scrollbar styling */
.preset-scroll-container::-webkit-scrollbar {
    width: 6px;
}

.preset-scroll-container::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

.preset-scroll-container::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
}

.preset-scroll-container::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

.preset-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.01);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.preset-item:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.06);
}

.preset-item.active {
    background: linear-gradient(90deg, rgba(0, 212, 255, 0.12) 0%, rgba(255, 143, 31, 0.02) 100%);
    border-color: rgba(0, 212, 255, 0.35);
    box-shadow: inset 0 0 10px rgba(0, 212, 255, 0.05);
}

.preset-item-name {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-primary);
}

.preset-item.active .preset-item-name {
    color: var(--neon-cyan);
    font-weight: 600;
}

.preset-item-category {
    font-size: 8px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    padding: 3px 8px;
    border-radius: 4px;
}

.preset-item.active .preset-item-category {
    color: var(--neon-cyan);
    background: rgba(0, 212, 255, 0.1);
}

/* Persistent Bottom Quick Preset Bar */
.quick-preset-bar {
    display: flex;
    gap: 16px;
    align-items: center;
    background: rgba(4, 6, 12, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.03);
    padding: 10px 20px;
    border-radius: 14px;
    margin-top: 12px;
    width: 100%;
    backdrop-filter: blur(10px);
}

/* Keyboard Panel */
.keyboard-panel {
    background: rgba(4, 6, 12, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    padding: 12px;
    margin-top: 10px;
}

.keyboard-container {
    display: flex;
    justify-content: center;
    position: relative;
    height: 150px;
    width: 100%;
    user-select: none;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.5);
}

.key-white {
    flex: 1;
    background: linear-gradient(to bottom, #ffffff 0%, #e2e8f0 100%);
    border-right: 1px solid #0f172a;
    height: 100%;
    cursor: pointer;
    border-bottom-left-radius: 4px;
    border-bottom-right-radius: 4px;
    position: relative;
    z-index: 1;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 6px;
    font-size: 9px;
    font-weight: 700;
    color: #475569;
    transition: background 0.1s;
}

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

.key-white.active {
    background: linear-gradient(to bottom, #ffffff 0%, var(--neon-cyan) 100%);
    box-shadow: 0 0 15px var(--neon-cyan-glow);
}

.key-black {
    width: 4.5%;
    background: linear-gradient(to bottom, #1e293b 0%, #020617 100%);
    border: 1px solid #000;
    height: 60%;
    margin-left: -2.25%;
    margin-right: -2.25%;
    z-index: 2;
    cursor: pointer;
    border-bottom-left-radius: 3px;
    border-bottom-right-radius: 3px;
    position: relative;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    transition: background 0.1s;
}

.key-black.active {
    background: linear-gradient(to bottom, #1e293b 0%, var(--neon-orange) 100%); /* Active black key uses orange */
    box-shadow: 0 0 15px var(--neon-orange-glow);
}

/* Control Buttons & UI Elements */
.btn-primary {
    background: linear-gradient(135deg, #0088ff 0%, var(--neon-blue) 100%);
    border: none;
    color: #ffffff;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 12px;
    padding: 8px 18px;
    border-radius: 6px;
    cursor: pointer;
    box-shadow: 0 4px 12px var(--neon-blue-glow);
    transition: all 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px var(--neon-blue-glow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 11px;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

select {
    width: 100%;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: 'Outfit', sans-serif;
    font-size: 12px;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}

select:focus {
    border-color: var(--neon-cyan);
}

/* Premium Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(4, 5, 8, 0.96);
    backdrop-filter: blur(12px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: linear-gradient(135deg, rgba(10, 16, 26, 0.95) 0%, rgba(4, 5, 8, 0.98) 100%);
    border: 1px solid rgba(255, 59, 48, 0.2);
    border-radius: 16px;
    padding: 48px;
    text-align: center;
    max-width: 480px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 30px rgba(255, 59, 48, 0.05);
    transform: scale(0.9);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-content h2 {
    font-family: 'Space Grotesk', sans-serif;
    color: #fff;
    font-size: 24px;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.modal-content p {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 24px;
}

.preorder-btn {
    display: inline-block;
    padding: 16px 36px;
    background: linear-gradient(135deg, var(--neon-red) 0%, var(--neon-orange) 100%);
    color: #fff !important;
    text-decoration: none;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 1px;
    border-radius: 6px;
    box-shadow: 0 4px 15px var(--neon-red-glow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.preorder-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 59, 48, 0.5);
}

.watermark-cue {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(255, 59, 48, 0.9);
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    z-index: 9999;
    box-shadow: 0 4px 15px var(--neon-red-glow);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.watermark-cue.active {
    opacity: 1;
}

/* MIDI device dropdown select custom styling */
.midi-select {
    background: rgba(4, 6, 10, 0.85);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    transition: border-color 0.2s;
}

.midi-select:focus {
    border-color: var(--neon-cyan);
}

/* MIDI Learn/Mapped Visual Indicators */
.midi-learning {
    box-shadow: 0 0 10px rgba(168, 85, 247, 0.8) !important;
    border-color: rgba(168, 85, 247, 0.8) !important;
    animation: pulse-midi-learn 1.2s infinite ease-in-out;
}

@keyframes pulse-midi-learn {
    0%, 100% { transform: scale(1.0); }
    50% { transform: scale(0.98); opacity: 0.8; }
}

.midi-mapped {
    box-shadow: 0 0 5px rgba(0, 242, 254, 0.5) !important;
    border-color: rgba(0, 242, 254, 0.5) !important;
}

/* Custom MIDI Context Menu popup */
#midi-context-menu {
    background: #0d0f14 !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    border-radius: 6px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.6) !important;
    display: none;
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    min-width: 130px;
    padding: 4px 0;
    position: absolute;
    z-index: 100000;
}

.midi-menu-item {
    color: #b3b9c1;
    cursor: pointer;
    padding: 6px 14px;
    transition: all 0.15s ease;
}

.midi-menu-item:hover {
    background: rgba(0, 242, 254, 0.15);
    color: #fff;
}

.midi-menu-item.forget {
    color: #ef4444;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 4px;
    padding-top: 8px;
}

.midi-menu-item.forget:hover {
    background: rgba(239, 68, 68, 0.15);
    color: #fff;
}

/* Responsive Layout Adjustments */
@media (max-width: 1300px) {
    .engine-layout {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    .visualizers-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 900px) {
    .seq-arp-layout {
        grid-template-columns: 1fr !important;
    }
    .keyboard-panel {
        overflow-x: auto !important;
    }
    .keyboard-container {
        min-width: 900px !important;
    }
}

/* General Collapsible Panels */
.panel.collapsible .panel-header,
.keyboard-panel.collapsible .panel-header {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    padding: 2px 4px;
}

.panel.collapsible .panel-header:hover .panel-title,
.keyboard-panel.collapsible .panel-header:hover .panel-title {
    color: var(--neon-cyan);
}

.panel.collapsible .collapse-chevron,
.keyboard-panel.collapsible .collapse-chevron {
    font-size: 10px;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
    display: inline-block;
}

.panel.collapsible .panel-body,
.keyboard-panel.collapsible .panel-body {
    max-height: 2000px;
    opacity: 1;
    overflow: visible;
    transition: max-height 0.4s cubic-bezier(0, 1, 0, 1), opacity 0.3s ease;
}

/* Step Sequencer desktop/general alignment */
.sequencer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 12px;
}

.seq-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    width: 100%;
    justify-content: space-between;
}

.seq-control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* Desktop override for mobile panel container */
@media (min-width: 769px) {
    .source-controls-panel {
        background: transparent !important;
        border: none !important;
        padding: 0 !important;
        box-shadow: none !important;
    }
    .panel.collapsible .collapse-chevron,
    .keyboard-panel.collapsible .collapse-chevron {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .engine-layout {
        grid-template-columns: 1fr !important;
    }
    .visualizers-grid {
        grid-template-columns: 1fr !important;
    }
    header {
        flex-direction: column !important;
        gap: 12px !important;
        align-items: flex-start !important;
    }
    .header-left {
        flex-direction: column !important;
        align-items: stretch !important;
        width: 100% !important;
        gap: 12px !important;
    }
    .branding {
        justify-content: space-between !important;
        width: 100% !important;
    }
    #btn-power {
        width: 100% !important;
        text-align: center !important;
    }
    .play-controls {
        width: 100% !important;
        justify-content: space-between !important;
    }
    .tabs-nav {
        flex-direction: column !important;
        align-items: stretch !important;
    }
    .tab-buttons {
        width: 100%;
        display: flex;
    }
    .tab-btn {
        flex: 1;
        padding: 8px 4px !important;
        font-size: 10px !important;
        text-align: center;
        letter-spacing: 0.5px !important;
    }
    .subtabs-nav {
        width: 100%;
        display: flex;
    }
    .subtab-btn {
        flex: 1;
        padding: 8px 2px !important;
        font-size: 9px !important;
        text-align: center;
        letter-spacing: 0.5px !important;
    }
    .quick-preset-container {
        justify-content: space-between !important;
        width: 100% !important;
    }
    .synth-container {
        padding: 12px !important;
        border-radius: 12px !important;
    }
    
    /* Collapsing Panel Mobile Implementation */
    .panel.collapsible.collapsed .panel-body,
    .keyboard-panel.collapsible.collapsed .panel-body {
        max-height: 0 !important;
        opacity: 0 !important;
        overflow: hidden !important;
        pointer-events: none;
        margin: 0 !important;
        padding-top: 0 !important;
        padding-bottom: 0 !important;
    }
    
    .panel.collapsible.collapsed,
    .keyboard-panel.collapsible.collapsed {
        gap: 0 !important;
    }
    
    .panel.collapsible.collapsed .collapse-chevron,
    .keyboard-panel.collapsible.collapsed .collapse-chevron {
        transform: rotate(-90deg);
    }
    
    /* De-nesting source controls child panels */
    .source-editor-panel {
        display: contents !important;
    }
    
    .source-controls-panel {
        background: rgba(4, 6, 12, 0.5);
        border: 1px solid rgba(255, 255, 255, 0.03);
        border-radius: 16px;
        padding: 16px;
    }
    
    .source-content-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }
    
    .mod-matrix-grid {
        grid-template-columns: 1fr !important;
    }
    
    .vertical-sliders-row {
        flex-wrap: wrap !important;
    }
    
    /* Horizontal scroll for step sequencer */
    .steps-container {
        overflow-x: auto !important;
        justify-content: flex-start !important;
        padding-bottom: 8px;
    }
    .step-card {
        min-width: 64px !important;
        flex: 0 0 64px !important;
    }
}