/* ==========================================================================
   Niffty DJ - Next-Gen Ultra-Premium Cybernetic DJ Interface
   ========================================================================== */

:root {
    --bg-deep-void: #030508;
    --bg-primary: #080b11;
    --bg-surface: #0d121c;
    --bg-surface-elevated: #131b29;
    --bg-surface-glass: rgba(19, 27, 41, 0.75);
    --bg-surface-active: #1c273b;
    
    --border-subtle: rgba(255, 255, 255, 0.07);
    --border-medium: rgba(255, 255, 255, 0.14);
    --border-bright: rgba(0, 240, 255, 0.4);

    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #62728b;

    /* Next-Gen Holographic Neon Palette */
    --neon-cyan: #00f2fe;
    --neon-blue: #4facfe;
    --neon-magenta: #f72585;
    --neon-purple: #7209b7;
    --neon-emerald: #05ffa1;
    --neon-amber: #ffbe0b;
    --neon-crimson: #ff0055;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

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

html, body {
    background-color: var(--bg-deep-void);
    color: var(--text-primary);
    font-family: var(--font-sans);
    height: 100%;
    height: 100dvh;
    width: 100%;
    width: 100dvw;
    overflow: hidden;
    overscroll-behavior: none;
    -webkit-text-size-adjust: 100%;
    touch-action: manipulation;
    display: flex;
    flex-direction: column;
}

/* Master Header HUD */
.niffty-header {
    height: 52px;
    background: linear-gradient(180deg, rgba(18, 24, 36, 0.96) 0%, rgba(8, 11, 17, 0.98) 100%);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 50;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.65), inset 0 -1px 0 rgba(0, 242, 254, 0.15);
}

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

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    text-decoration: none;
    user-select: none;
}

.brand-logo:hover {
    transform: scale(1.02);
}

.brand-dj-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    filter: drop-shadow(0 0 10px rgba(0, 242, 254, 0.5));
    transition: filter 0.3s ease;
    flex-shrink: 0;
}

.brand-logo:hover .brand-dj-icon {
    filter: drop-shadow(0 0 16px var(--neon-cyan, #00f2fe)) drop-shadow(0 0 10px var(--neon-magenta, #f72585));
}

.brand-dj-svg {
    width: 40px;
    height: 40px;
    display: block;
    overflow: visible;
    transition: transform 0.65s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.brand-logo:hover .brand-dj-svg {
    transform: rotate(360deg);
}

.brand-text-block {
    display: flex;
    flex-direction: column;
    gap: 2px;
    justify-content: center;
}

.brand-title {
    display: flex;
    align-items: center;
    line-height: 1;
}

.brand-title-niffty {
    font-family: 'Orbitron', 'Rajdhani', sans-serif;
    font-weight: 900;
    font-size: 17px;
    letter-spacing: 2px;
    background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 55%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.9));
}

.brand-title-dj {
    font-family: 'Orbitron', 'Rajdhani', sans-serif;
    font-weight: 900;
    font-style: italic;
    font-size: 17px;
    letter-spacing: 1.5px;
    margin-left: 3px;
    background: linear-gradient(135deg, var(--neon-cyan, #00f2fe) 0%, var(--neon-magenta, #f72585) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.6));
}

.brand-beta-tag {
    font-size: 7.5px;
    font-family: 'Orbitron', var(--font-mono);
    font-weight: 900;
    padding: 2px 5px;
    border-radius: 4px;
    margin-left: 6px;
    background: linear-gradient(135deg, rgba(255, 170, 0, 0.22), rgba(247, 37, 133, 0.16));
    border: 1px solid #ffaa00;
    color: #ffaa00;
    letter-spacing: 1px;
    line-height: 1;
    box-shadow: 0 0 8px rgba(255, 170, 0, 0.4);
    animation: betaGlow 3s infinite ease-in-out;
}

@keyframes betaGlow {
    0%, 100% { box-shadow: 0 0 6px rgba(255, 170, 0, 0.35); border-color: #ffaa00; color: #ffaa00; }
    50% { box-shadow: 0 0 14px rgba(255, 170, 0, 0.75); border-color: #ffd000; color: #ffe580; }
}

.brand-subtext {
    font-size: 7.5px;
    font-family: 'Rajdhani', var(--font-mono);
    font-weight: 700;
    letter-spacing: 1.8px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
    line-height: 1;
}

.brand-subtext-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--neon-emerald, #05ffa1);
    box-shadow: 0 0 6px var(--neon-emerald, #05ffa1);
    animation: hardwarePulse 2s infinite;
}

/* Live Hardware Controller Detection Badge in Header */
.hardware-status-hud {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.55);
    border: 1px solid rgba(0, 242, 254, 0.25);
    padding: 3.5px 10px;
    border-radius: 16px;
    font-size: 10.5px;
    font-weight: 700;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.1);
}

.hardware-pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--neon-emerald);
    box-shadow: 0 0 8px var(--neon-emerald);
    animation: hardwarePulse 2s infinite;
}

@keyframes hardwarePulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
    100% { transform: scale(1); opacity: 1; }
}

.hardware-controller-text {
    color: var(--neon-cyan);
    font-family: var(--font-mono);
    max-width: 240px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Header Center Tools */
.header-center-tools {
    display: flex;
    align-items: center;
    gap: 10px;
}

.view-mode-toggles, .deck-mode-toggles {
    display: flex;
    background: var(--bg-deep-void, #04070d);
    border-radius: 7px;
    padding: 2.5px;
    border: 1px solid var(--border-medium, rgba(255, 255, 255, 0.12));
    height: 33px;
    box-sizing: border-box;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.7), 0 1px 0 rgba(255, 255, 255, 0.04);
}

.header-toggle-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted, #62728b);
    font-family: 'Rajdhani', 'Orbitron', var(--font-sans);
    font-size: 10.5px;
    font-weight: 700;
    padding: 0 12px;
    height: 100%;
    min-width: 62px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.8px;
    user-select: none;
}

.header-toggle-btn:hover {
    color: var(--text-primary, #ffffff);
    background: rgba(255, 255, 255, 0.05);
}

.header-toggle-btn.active {
    background: linear-gradient(180deg, var(--bg-surface-active, #1c273b) 0%, var(--bg-surface-elevated, #131b29) 100%);
    color: #ffffff;
    border: 1px solid var(--neon-cyan, #00f2fe);
    box-shadow: 0 0 12px var(--neon-cyan, rgba(0, 242, 254, 0.45)), inset 0 1px 0 rgba(255, 255, 255, 0.22);
    font-weight: 800;
    text-shadow: 0 0 8px var(--neon-cyan, #00f2fe);
}

.quantize-btn {
    background: var(--bg-deep-void, #04070d);
    border: 1px solid var(--border-medium, rgba(255, 255, 255, 0.12));
    color: var(--text-secondary, #a0aec0);
    font-family: 'Rajdhani', var(--font-sans);
    font-size: 10.5px;
    font-weight: 700;
    padding: 0 12px;
    height: 33px;
    box-sizing: border-box;
    border-radius: 7px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-width: 92px;
    letter-spacing: 0.8px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.7), 0 1px 0 rgba(255, 255, 255, 0.04);
    user-select: none;
}

.quantize-btn:hover {
    color: var(--text-primary, #ffffff);
    border-color: var(--border-bright, rgba(0, 240, 255, 0.4));
}

.quantize-btn .quantize-led {
    width: 6.5px;
    height: 6.5px;
    border-radius: 50%;
    background: #334155;
    border: 1px solid rgba(0, 0, 0, 0.6);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.8);
    transition: all 0.25s ease;
}

.quantize-btn.active .quantize-led {
    background: var(--neon-emerald, #05ffa1);
    border-color: var(--neon-emerald, #05ffa1);
    box-shadow: 0 0 8px var(--neon-emerald, #05ffa1), 0 0 14px var(--neon-emerald, #05ffa1);
}

.quantize-btn.active {
    background: linear-gradient(180deg, var(--bg-surface-active, #1c273b) 0%, var(--bg-surface-elevated, #131b29) 100%);
    border-color: var(--neon-emerald, #05ffa1);
    color: var(--neon-emerald, #05ffa1);
    box-shadow: 0 0 12px rgba(5, 255, 161, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    text-shadow: 0 0 6px var(--neon-emerald, #05ffa1);
}

.quantize-res-badge {
    font-size: 9px;
    font-family: var(--font-mono, monospace);
    font-weight: 900;
    padding: 1px 4px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-secondary, #a0aec0);
    border: 1px solid rgba(255, 255, 255, 0.12);
    margin-left: 2px;
    line-height: 1.1;
}

.quantize-btn.active .quantize-res-badge {
    background: rgba(5, 255, 161, 0.15);
    color: var(--neon-emerald, #05ffa1);
    border-color: rgba(5, 255, 161, 0.4);
    box-shadow: 0 0 6px rgba(5, 255, 161, 0.2);
}

/* Header Right Actions - Sleek Ergonomic Tactile DJ Switch Buttons */
.header-right-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.header-action-btn.nav-tab-item {
    height: 33px;
    min-width: 82px;
    padding: 0 11px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: 'Rajdhani', var(--font-sans);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.8px;
    border-radius: 6px;
    box-sizing: border-box;
    white-space: nowrap;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--bg-surface-elevated, #131b29) 0%, var(--bg-surface, #0d121c) 100%);
    border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
    border-top: 1px solid var(--border-medium, rgba(255, 255, 255, 0.16));
    color: var(--text-primary, #ffffff);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    user-select: none;
}

.header-action-btn.nav-tab-item:hover {
    border-color: var(--neon-cyan, #00f2fe);
    background: linear-gradient(180deg, var(--bg-surface-active, #1c273b) 0%, var(--bg-surface-elevated, #131b29) 100%);
    box-shadow: 0 0 14px var(--neon-cyan, rgba(0, 242, 254, 0.4)), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    color: #ffffff;
    transform: translateY(-1px);
}

.header-action-btn.nav-tab-item:active {
    transform: translateY(1px);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.6);
}

.header-action-btn.nav-tab-item.active {
    background: linear-gradient(180deg, var(--bg-surface-active, #1c273b) 0%, var(--bg-surface-elevated, #131b29) 100%);
    border-color: var(--neon-cyan, #00f2fe);
    color: #ffffff;
    box-shadow: 0 0 14px var(--neon-cyan, rgba(0, 242, 254, 0.4)), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.header-action-btn.nav-tab-item.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 14%;
    right: 14%;
    height: 2px;
    background: var(--neon-cyan, #00f2fe);
    border-radius: 2px;
    box-shadow: 0 0 8px var(--neon-cyan, #00f2fe);
}

.record-hud-btn {
    border-color: rgba(255, 51, 85, 0.4) !important;
    background: linear-gradient(180deg, rgba(255, 51, 85, 0.16) 0%, rgba(255, 51, 85, 0.06) 100%) !important;
    color: #ff3355 !important;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 51, 85, 0.25) !important;
}

.record-hud-btn .rec-icon {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #ff3355;
    box-shadow: 0 0 6px #ff3355;
    display: inline-block;
    transition: all 0.2s ease;
}

.record-hud-btn:hover {
    border-color: #ff0033 !important;
    background: linear-gradient(180deg, rgba(255, 0, 51, 0.28) 0%, rgba(255, 0, 51, 0.12) 100%) !important;
    box-shadow: 0 0 14px rgba(255, 0, 51, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.2) !important;
    color: #ffffff !important;
    transform: translateY(-1px);
}

.record-hud-btn:hover .rec-icon {
    background: #ff0033;
    box-shadow: 0 0 10px #ff0033;
}

.record-hud-btn.recording {
    background: linear-gradient(180deg, #ff0044 0%, #b8002a 100%) !important;
    color: #ffffff !important;
    border-color: #ff3366 !important;
    box-shadow: 0 0 20px rgba(255, 0, 68, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.35) !important;
    animation: recPulse 1.2s infinite;
}

.record-hud-btn.recording .rec-icon {
    background: #ffffff;
    box-shadow: 0 0 10px #ffffff;
}

@keyframes recPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.85; transform: scale(0.98); }
}

.install-pwa-btn {
    border-color: var(--border-subtle);
}

.install-pwa-btn:hover {
    border-color: var(--neon-emerald, #05ffa1);
    box-shadow: 0 0 14px var(--neon-emerald, rgba(5, 255, 161, 0.4)), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.nav-tab-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.header-action-btn.nav-tab-item:hover .nav-tab-icon {
    transform: scale(1.18);
}

.nav-tab-label {
    line-height: 1;
    display: inline-block;
}

/* Settings Modal Specific Styling */
/* Settings Modal Specific Styling */
.settings-modal-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-medium);
    border-radius: 10px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.95), 0 0 30px rgba(0, 242, 254, 0.15);
    overflow: hidden;
}

.settings-modal-layout {
    display: flex;
    height: 500px;
    max-height: 78vh;
    overflow: hidden;
}

.settings-sidebar {
    width: 195px;
    min-width: 195px;
    background: var(--bg-deep-void);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    padding: 10px 8px;
    gap: 4px;
    overflow-y: auto;
}

.settings-tab-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}

.settings-tab-btn .tab-svg-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    stroke: currentColor;
    transition: transform 0.2s ease, stroke 0.2s ease, filter 0.2s ease, color 0.2s ease;
}

.settings-tab-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.08);
}

.settings-tab-btn:hover .tab-svg-icon {
    transform: scale(1.12);
    color: var(--neon-cyan);
    filter: drop-shadow(0 0 6px var(--neon-cyan));
}

.settings-tab-btn.active {
    color: #000;
    background: linear-gradient(90deg, var(--neon-cyan), rgba(0, 242, 254, 0.85));
    font-weight: 900;
    border-color: var(--neon-cyan);
    box-shadow: 0 0 14px rgba(0, 242, 254, 0.45);
}

.settings-tab-btn.active .tab-svg-icon {
    color: #000;
    stroke: #000;
    filter: none;
    transform: none;
}

.settings-panes-wrapper {
    flex: 1;
    padding: 18px 24px;
    overflow-y: auto;
    background: var(--bg-surface);
}

.settings-panes-wrapper::-webkit-scrollbar {
    width: 6px;
}
.settings-panes-wrapper::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}
.settings-panes-wrapper::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 3px;
}
.settings-panes-wrapper::-webkit-scrollbar-thumb:hover {
    background: var(--neon-cyan);
}

.settings-pane {
    display: none;
    flex-direction: column;
    gap: 14px;
}

.settings-pane.active {
    display: flex;
}

/* Polished Settings Pane Header */
.settings-pane-header {
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 2px;
}

.pane-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pane-tag {
    font-size: 8.5px;
    font-weight: 900;
    color: var(--neon-cyan);
    background: rgba(0, 242, 254, 0.12);
    border: 1px solid rgba(0, 242, 254, 0.3);
    padding: 1px 6px;
    border-radius: 4px;
    letter-spacing: 0.6px;
    font-family: var(--font-mono);
}

.pane-title {
    margin: 0;
    font-size: 13px;
    font-weight: 900;
    color: #fff;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.pane-subtitle {
    font-size: 10px;
    color: var(--text-muted);
}

.settings-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    padding: 12px 14px;
    border-radius: 7px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    transition: all 0.2s ease;
}

.settings-group:hover {
    border-color: rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.025);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.settings-label-row {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.settings-item-title {
    font-size: 11.5px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.settings-item-desc {
    font-size: 10px;
    color: var(--text-muted);
    line-height: 1.4;
}

.settings-select {
    appearance: none;
    -webkit-appearance: none;
    background-color: var(--bg-deep-void);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2300f2fe' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 11px 11px;
    border: 1px solid var(--border-subtle);
    color: var(--neon-cyan);
    padding: 8px 32px 8px 12px;
    border-radius: 5px;
    font-size: 11px;
    font-weight: 700;
    font-family: var(--font-mono);
    outline: none;
    cursor: pointer;
    margin-top: 4px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    transition: all 0.2s ease;
}

.settings-select:hover {
    border-color: rgba(0, 242, 254, 0.4);
    background-color: rgba(0, 0, 0, 0.6);
}

.settings-select:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.35);
}

[data-theme="niffty-day-light"] .settings-select,
[data-theme="serato-day-light"] .settings-select,
[data-theme="studio-pearl"] .settings-select {
    background-color: #f8fafc;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%230066ff' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    border-color: #cbd5e1;
    color: #0066ff;
}

.about-card-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 16px;
    border-radius: 8px;
}

/* Gain & Headroom Dedicated Card */
.gain-headroom-card {
    background: linear-gradient(180deg, var(--bg-surface-elevated), rgba(0, 242, 254, 0.03));
    border: 1px solid rgba(0, 242, 254, 0.25);
    padding: 14px 16px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
    transition: all 0.25s ease;
}

.gain-headroom-card:hover {
    border-color: rgba(0, 242, 254, 0.4);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35), 0 0 14px rgba(0, 242, 254, 0.08);
}

.settings-badge-pill {
    background: rgba(0, 242, 254, 0.15);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    font-size: 9px;
    font-weight: 900;
    font-family: var(--font-mono);
    padding: 2px 8px;
    border-radius: 12px;
    letter-spacing: 0.6px;
    text-transform: uppercase;
}

.settings-card-actions-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 4px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.settings-action-hint {
    font-size: 9.5px;
    color: var(--text-muted);
    line-height: 1.4;
    flex: 1;
}

.settings-card-reset-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    padding: 7px 14px;
    border-radius: 5px;
    font-size: 10px;
    font-weight: 900;
    letter-spacing: 0.6px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
    font-family: inherit;
    flex-shrink: 0;
}

.settings-card-reset-btn svg {
    color: currentColor;
    flex-shrink: 0;
}

.settings-card-reset-btn:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 16px rgba(0, 242, 254, 0.5);
    transform: translateY(-1px);
}

.settings-card-reset-btn:active {
    transform: translateY(0);
}

.settings-card-reset-btn.success {
    background: var(--neon-emerald) !important;
    color: #000 !important;
    border-color: var(--neon-emerald) !important;
    box-shadow: 0 0 16px rgba(5, 255, 161, 0.6) !important;
}

.hardware-feature-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 16px;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    transition: all 0.2s ease;
}

.hardware-feature-group:hover {
    border-color: rgba(0, 242, 254, 0.35);
    background: rgba(255, 255, 255, 0.025);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.hardware-feature-info {
    display: flex;
    flex-direction: column;
    gap: 3px;
    flex: 1;
}

.settings-feature-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.3);
    color: var(--neon-cyan);
    padding: 8px 16px;
    border-radius: 5px;
    font-size: 10.5px;
    font-weight: 800;
    cursor: pointer;
    white-space: nowrap;
    letter-spacing: 0.5px;
    transition: all 0.2s ease;
    font-family: inherit;
}

.settings-feature-btn svg {
    color: currentColor;
    flex-shrink: 0;
}

.settings-feature-btn:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 14px rgba(0, 242, 254, 0.4);
}

.settings-action-btn {
    background: rgba(0, 242, 254, 0.12);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    padding: 8px 14px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 900;
    cursor: pointer;
    white-space: nowrap;
    letter-spacing: 0.5px;
    transition: all 0.2s ease;
    font-family: inherit;
}

.settings-action-btn:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 12px rgba(0, 242, 254, 0.4);
}

/* ==========================================================================
   Theme Selector Cards & Visual Grid in Settings
   ========================================================================== */
.theme-selector-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 4px;
}

.theme-card-option {
    background: var(--bg-surface);
    border: 1.5px solid var(--border-subtle);
    border-radius: 6px;
    padding: 9px 10px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: all 0.18s ease;
}

.theme-card-option:hover {
    border-color: var(--border-medium);
    background: var(--bg-surface-active);
    transform: translateY(-2px);
}

.theme-card-option.active {
    border-color: var(--neon-cyan);
    background: var(--bg-surface-elevated);
    box-shadow: 0 0 14px rgba(0, 242, 254, 0.35);
}

.theme-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.theme-card-name {
    font-size: 11px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.theme-check-badge {
    font-size: 11px;
    font-weight: 900;
    color: var(--neon-cyan);
    opacity: 0;
    transition: opacity 0.15s ease;
}

.theme-card-option.active .theme-check-badge {
    opacity: 1;
}

.theme-swatches {
    display: flex;
    gap: 5px;
    align-items: center;
}

.theme-swatch {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   Curated Professional DJ Hardware Colorway Themes
   ========================================================================== */

/* 1. Pioneer Onyx (Club Standard Blue & Amber) */
[data-theme="pioneer-onyx"] {
    --bg-deep-void: #040508;
    --bg-primary: #090b10;
    --bg-surface: #0f131a;
    --bg-surface-elevated: #161c27;
    --bg-surface-active: #1d2535;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-medium: rgba(255, 255, 255, 0.16);
    --border-bright: rgba(0, 136, 255, 0.5);
    --neon-cyan: #0088ff;
    --neon-blue: #29b6f6;
    --neon-magenta: #ff9100;
    --neon-purple: #ff5722;
    --neon-emerald: #00e676;
    --neon-amber: #ffc107;
}

/* 2. Niffty Dark (Performance Midnight Red & Cobalt) */
[data-theme="niffty-dark"],
[data-theme="serato-dark"] {
    --bg-deep-void: #050507;
    --bg-primary: #09090c;
    --bg-surface: #101015;
    --bg-surface-elevated: #17171f;
    --bg-surface-active: #20202c;
    --border-subtle: rgba(255, 255, 255, 0.07);
    --border-medium: rgba(255, 255, 255, 0.15);
    --border-bright: rgba(255, 23, 68, 0.5);
    --neon-cyan: #ff1744;
    --neon-blue: #ff5252;
    --neon-magenta: #2979ff;
    --neon-purple: #536dfe;
    --neon-emerald: #00e676;
    --neon-amber: #ffea00;
}

/* 3. Tokyo Violet (Synthwave & Cyberpunk Ultraviolet) */
[data-theme="tokyo-violet"] {
    --bg-deep-void: #06020a;
    --bg-primary: #0d0517;
    --bg-surface: #150924;
    --bg-surface-elevated: #1e0d34;
    --bg-surface-active: #291247;
    --border-subtle: rgba(181, 23, 158, 0.18);
    --border-medium: rgba(181, 23, 158, 0.32);
    --border-bright: rgba(247, 37, 133, 0.6);
    --neon-cyan: #b5179e;
    --neon-blue: #7209b7;
    --neon-magenta: #ff007f;
    --neon-purple: #4cc9f0;
    --neon-emerald: #05ffa1;
    --neon-amber: #f72585;
}

/* 4. Technics Slate (Brushed Titanium & Champagne Gold) */
[data-theme="technics-silver"] {
    --bg-deep-void: #080a0d;
    --bg-primary: #101318;
    --bg-surface: #181d24;
    --bg-surface-elevated: #222832;
    --bg-surface-active: #2d3543;
    --border-subtle: rgba(255, 255, 255, 0.09);
    --border-medium: rgba(255, 255, 255, 0.18);
    --border-bright: rgba(229, 192, 123, 0.5);
    --neon-cyan: #e5c07b;
    --neon-blue: #d19a66;
    --neon-magenta: #98c379;
    --neon-purple: #61afef;
    --neon-emerald: #73d216;
    --neon-amber: #e5c07b;
}

/* 5. Ghost Stealth (Matte Monochromatic Slate & White) */
[data-theme="ghost-stealth"] {
    --bg-deep-void: #050505;
    --bg-primary: #0a0a0a;
    --bg-surface: #121212;
    --bg-surface-elevated: #1a1a1a;
    --bg-surface-active: #242424;
    --border-subtle: rgba(255, 255, 255, 0.1);
    --border-medium: rgba(255, 255, 255, 0.2);
    --border-bright: rgba(255, 255, 255, 0.6);
    --neon-cyan: #f1f5f9;
    --neon-blue: #cbd5e1;
    --neon-magenta: #ff3344;
    --neon-purple: #64748b;
    --neon-emerald: #10b981;
    --neon-amber: #f59e0b;
}

/* 6. Niffty Day Light (High-Contrast Daylight & Outdoor Festival Theme) */
[data-theme="niffty-day-light"],
[data-theme="serato-day-light"] {
    --bg-deep-void: #e2e8f0;
    --bg-primary: #edf2f7;
    --bg-surface: #ffffff;
    --bg-surface-elevated: #f8fafc;
    --bg-surface-active: #cbd5e1;
    --text-primary: #090d16;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --border-subtle: rgba(0, 0, 0, 0.12);
    --border-medium: rgba(0, 0, 0, 0.22);
    --border-bright: rgba(0, 102, 255, 0.6);
    --neon-cyan: #0066ff;
    --neon-blue: #0284c7;
    --neon-magenta: #dc2626;
    --neon-purple: #7c3aed;
    --neon-emerald: #059669;
    --neon-amber: #d97706;
}

/* 7. Studio Pearl White (Clean Minimalist White Theme) */
[data-theme="studio-pearl"] {
    --bg-deep-void: #f1f5f9;
    --bg-primary: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-elevated: #e2e8f0;
    --bg-surface-active: #cbd5e1;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --border-subtle: rgba(15, 23, 42, 0.1);
    --border-medium: rgba(15, 23, 42, 0.2);
    --border-bright: rgba(14, 165, 233, 0.6);
    --neon-cyan: #0284c7;
    --neon-blue: #2563eb;
    --neon-magenta: #db2777;
    --neon-purple: #9333ea;
    --neon-emerald: #16a34a;
    --neon-amber: #ca8a04;
}

/* Universal Light Theme Styling Overrides */
[data-theme="niffty-day-light"] .niffty-header,
[data-theme="serato-day-light"] .niffty-header,
[data-theme="studio-pearl"] .niffty-header,
[data-theme="niffty-day-light"] .app-header,
[data-theme="serato-day-light"] .app-header,
[data-theme="studio-pearl"] .app-header {
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.14);
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.08);
}

[data-theme="niffty-day-light"] .view-mode-toggles,
[data-theme="serato-day-light"] .view-mode-toggles,
[data-theme="studio-pearl"] .view-mode-toggles,
[data-theme="niffty-day-light"] .deck-mode-toggles,
[data-theme="serato-day-light"] .deck-mode-toggles,
[data-theme="studio-pearl"] .deck-mode-toggles,
[data-theme="niffty-day-light"] .quantize-btn,
[data-theme="serato-day-light"] .quantize-btn,
[data-theme="studio-pearl"] .quantize-btn {
    background: #f1f5f9;
    border-color: #cbd5e1;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.08);
}

[data-theme="niffty-day-light"] .header-toggle-btn,
[data-theme="serato-day-light"] .header-toggle-btn,
[data-theme="studio-pearl"] .header-toggle-btn {
    color: #64748b;
}

[data-theme="niffty-day-light"] .header-toggle-btn:hover,
[data-theme="serato-day-light"] .header-toggle-btn:hover,
[data-theme="studio-pearl"] .header-toggle-btn:hover {
    color: #0f172a;
    background: rgba(0, 0, 0, 0.05);
}

[data-theme="niffty-day-light"] .header-toggle-btn.active,
[data-theme="serato-day-light"] .header-toggle-btn.active,
[data-theme="studio-pearl"] .header-toggle-btn.active {
    background: #ffffff;
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 1px 6px rgba(0, 102, 255, 0.25);
    text-shadow: none;
}

[data-theme="niffty-day-light"] .quantize-btn,
[data-theme="serato-day-light"] .quantize-btn,
[data-theme="studio-pearl"] .quantize-btn {
    color: #334155;
}

[data-theme="niffty-day-light"] .quantize-btn.active,
[data-theme="serato-day-light"] .quantize-btn.active,
[data-theme="studio-pearl"] .quantize-btn.active {
    background: #ffffff;
    border-color: var(--neon-emerald);
    color: var(--neon-emerald);
    box-shadow: 0 1px 6px rgba(5, 150, 105, 0.25);
    text-shadow: none;
}

[data-theme="niffty-day-light"] .header-action-btn.nav-tab-item,
[data-theme="serato-day-light"] .header-action-btn.nav-tab-item,
[data-theme="studio-pearl"] .header-action-btn.nav-tab-item {
    background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
    border: 1px solid #cbd5e1;
    border-top: 1px solid #e2e8f0;
    color: #1e293b;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), inset 0 1px 0 #ffffff;
}

[data-theme="niffty-day-light"] .header-action-btn.nav-tab-item:hover,
[data-theme="serato-day-light"] .header-action-btn.nav-tab-item:hover,
[data-theme="studio-pearl"] .header-action-btn.nav-tab-item:hover {
    background: #e2e8f0;
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 2px 8px rgba(0, 102, 255, 0.2);
}

[data-theme="niffty-day-light"] .header-action-btn.nav-tab-item.active,
[data-theme="serato-day-light"] .header-action-btn.nav-tab-item.active,
[data-theme="studio-pearl"] .header-action-btn.nav-tab-item.active {
    background: linear-gradient(180deg, #e0f2fe 0%, #bae6fd 100%);
    border-color: var(--neon-cyan);
    color: #0369a1;
    box-shadow: 0 2px 8px rgba(0, 102, 255, 0.25);
}

[data-theme="niffty-day-light"] .header-action-btn.nav-tab-item.active::after,
[data-theme="serato-day-light"] .header-action-btn.nav-tab-item.active::after,
[data-theme="studio-pearl"] .header-action-btn.nav-tab-item.active::after {
    background: var(--neon-cyan);
    box-shadow: 0 0 6px var(--neon-cyan);
}

[data-theme="niffty-day-light"] .hardware-status-hud,
[data-theme="serato-day-light"] .hardware-status-hud,
[data-theme="studio-pearl"] .hardware-status-hud {
    background: #ffffff;
    border-color: #cbd5e1;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

[data-theme="niffty-day-light"] .dj-deck-panel,
[data-theme="serato-day-light"] .dj-deck-panel,
[data-theme="studio-pearl"] .dj-deck-panel {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.14);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

[data-theme="niffty-day-light"] .dj-mixer-panel,
[data-theme="serato-day-light"] .dj-mixer-panel,
[data-theme="studio-pearl"] .dj-mixer-panel,
[data-theme="niffty-day-light"] .center-mixer-strip,
[data-theme="serato-day-light"] .center-mixer-strip,
[data-theme="studio-pearl"] .center-mixer-strip {
    background: #f8fafc;
    border-color: rgba(0, 0, 0, 0.14);
}

[data-theme="niffty-day-light"] .deck-pads-side-bay,
[data-theme="serato-day-light"] .deck-pads-side-bay,
[data-theme="studio-pearl"] .deck-pads-side-bay {
    background: #f1f5f9;
    border-color: rgba(0, 0, 0, 0.12);
}

[data-theme="niffty-day-light"] .deck-secondary-lower-bay,
[data-theme="serato-day-light"] .deck-secondary-lower-bay,
[data-theme="studio-pearl"] .deck-secondary-lower-bay {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.14);
}

[data-theme="niffty-day-light"] .deck-track-title,
[data-theme="serato-day-light"] .deck-track-title,
[data-theme="studio-pearl"] .deck-track-title {
    color: #0f172a;
}

[data-theme="niffty-day-light"] .deck-bpm-val,
[data-theme="serato-day-light"] .deck-bpm-val,
[data-theme="studio-pearl"] .deck-bpm-val {
    color: #0f172a;
}

[data-theme="niffty-day-light"] .library-browser-wrapper,
[data-theme="serato-day-light"] .library-browser-wrapper,
[data-theme="studio-pearl"] .library-browser-wrapper,
[data-theme="niffty-day-light"] .dj-library-dock,
[data-theme="serato-day-light"] .dj-library-dock,
[data-theme="studio-pearl"] .dj-library-dock {
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.14);
}

[data-theme="niffty-day-light"] .track-row:hover,
[data-theme="serato-day-light"] .track-row:hover,
[data-theme="studio-pearl"] .track-row:hover {
    background: #f1f5f9;
}

[data-theme="niffty-day-light"] .track-row.selected,
[data-theme="serato-day-light"] .track-row.selected,
[data-theme="studio-pearl"] .track-row.selected {
    background: #e2e8f0;
}

/* Tokyo Violet Full Background & Section Themes */
[data-theme="tokyo-violet"] .niffty-header {
    background: linear-gradient(180deg, #1e0d34 0%, #150924 100%);
    border-bottom: 1px solid rgba(181, 23, 158, 0.35);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7), inset 0 -1px 0 rgba(247, 37, 133, 0.25);
}
[data-theme="tokyo-violet"] .header-action-btn.nav-tab-item {
    background: linear-gradient(180deg, #24113e 0%, #170a29 100%);
    border-color: rgba(181, 23, 158, 0.3);
    border-top-color: rgba(247, 37, 133, 0.35);
}
[data-theme="tokyo-violet"] .header-action-btn.nav-tab-item:hover,
[data-theme="tokyo-violet"] .header-action-btn.nav-tab-item.active {
    border-color: #ff007f;
    box-shadow: 0 0 14px rgba(247, 37, 133, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
[data-theme="tokyo-violet"] .view-mode-toggles,
[data-theme="tokyo-violet"] .deck-mode-toggles,
[data-theme="tokyo-violet"] .quantize-btn {
    background: #0d0517;
    border-color: rgba(181, 23, 158, 0.3);
}
[data-theme="tokyo-violet"] .header-toggle-btn.active {
    border-color: #ff007f;
    box-shadow: 0 0 12px rgba(247, 37, 133, 0.5);
    text-shadow: 0 0 8px #ff007f;
}
[data-theme="tokyo-violet"] .dj-deck-panel,
[data-theme="tokyo-violet"] .dj-mixer-panel,
[data-theme="tokyo-violet"] .dj-modal-card,
[data-theme="tokyo-violet"] .settings-modal-card {
    background: #150924 !important;
    border-color: rgba(181, 23, 158, 0.3) !important;
}
[data-theme="tokyo-violet"] .mixer-channel-strip,
[data-theme="tokyo-violet"] .deck-pads-side-bay,
[data-theme="tokyo-violet"] .smart-transitions-panel,
[data-theme="tokyo-violet"] .deck-fx-bar,
[data-theme="tokyo-violet"] .settings-group {
    background: #1e0d34 !important;
    border-color: rgba(181, 23, 158, 0.25) !important;
}

/* Niffty Dark & Serato Dark Full Background & Section Themes */
[data-theme="niffty-dark"] .niffty-header,
[data-theme="serato-dark"] .niffty-header {
    background: linear-gradient(180deg, #17171f 0%, #101015 100%);
    border-bottom: 1px solid rgba(255, 23, 68, 0.35);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7), inset 0 -1px 0 rgba(255, 23, 68, 0.2);
}
[data-theme="niffty-dark"] .header-action-btn.nav-tab-item,
[data-theme="serato-dark"] .header-action-btn.nav-tab-item {
    background: linear-gradient(180deg, #1e1e28 0%, #13131a 100%);
    border-color: rgba(255, 23, 68, 0.25);
    border-top-color: rgba(255, 255, 255, 0.15);
}
[data-theme="niffty-dark"] .header-action-btn.nav-tab-item:hover,
[data-theme="niffty-dark"] .header-action-btn.nav-tab-item.active,
[data-theme="serato-dark"] .header-action-btn.nav-tab-item:hover,
[data-theme="serato-dark"] .header-action-btn.nav-tab-item.active {
    border-color: #ff1744;
    box-shadow: 0 0 14px rgba(255, 23, 68, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
[data-theme="niffty-dark"] .view-mode-toggles,
[data-theme="niffty-dark"] .deck-mode-toggles,
[data-theme="niffty-dark"] .quantize-btn,
[data-theme="serato-dark"] .view-mode-toggles,
[data-theme="serato-dark"] .deck-mode-toggles,
[data-theme="serato-dark"] .quantize-btn {
    background: #09090c;
    border-color: rgba(255, 23, 68, 0.25);
}
[data-theme="niffty-dark"] .header-toggle-btn.active,
[data-theme="serato-dark"] .header-toggle-btn.active {
    border-color: #ff1744;
    box-shadow: 0 0 12px rgba(255, 23, 68, 0.5);
    text-shadow: 0 0 8px #ff1744;
}
[data-theme="niffty-dark"] .dj-deck-panel,
[data-theme="niffty-dark"] .dj-mixer-panel,
[data-theme="niffty-dark"] .dj-modal-card,
[data-theme="niffty-dark"] .settings-modal-card,
[data-theme="serato-dark"] .dj-deck-panel,
[data-theme="serato-dark"] .dj-mixer-panel,
[data-theme="serato-dark"] .dj-modal-card,
[data-theme="serato-dark"] .settings-modal-card {
    background: #101015 !important;
    border-color: rgba(255, 23, 68, 0.25) !important;
}
[data-theme="niffty-dark"] .mixer-channel-strip,
[data-theme="niffty-dark"] .deck-pads-side-bay,
[data-theme="niffty-dark"] .smart-transitions-panel,
[data-theme="niffty-dark"] .deck-fx-bar,
[data-theme="niffty-dark"] .settings-group,
[data-theme="serato-dark"] .mixer-channel-strip,
[data-theme="serato-dark"] .deck-pads-side-bay,
[data-theme="serato-dark"] .smart-transitions-panel,
[data-theme="serato-dark"] .deck-fx-bar,
[data-theme="serato-dark"] .settings-group {
    background: #17171f !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
}

/* Technics Silver Full Background & Section Themes */
[data-theme="technics-silver"] .niffty-header {
    background: linear-gradient(180deg, #222832 0%, #181d24 100%);
    border-bottom: 1px solid rgba(229, 192, 123, 0.35);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7), inset 0 -1px 0 rgba(229, 192, 123, 0.2);
}
[data-theme="technics-silver"] .header-action-btn.nav-tab-item {
    background: linear-gradient(180deg, #2a323e 0%, #1d232c 100%);
    border-color: rgba(229, 192, 123, 0.25);
    border-top-color: rgba(255, 255, 255, 0.16);
}
[data-theme="technics-silver"] .header-action-btn.nav-tab-item:hover,
[data-theme="technics-silver"] .header-action-btn.nav-tab-item.active {
    border-color: #e5c07b;
    box-shadow: 0 0 14px rgba(229, 192, 123, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
[data-theme="technics-silver"] .view-mode-toggles,
[data-theme="technics-silver"] .deck-mode-toggles,
[data-theme="technics-silver"] .quantize-btn {
    background: #101318;
    border-color: rgba(229, 192, 123, 0.25);
}
[data-theme="technics-silver"] .header-toggle-btn.active {
    border-color: #e5c07b;
    box-shadow: 0 0 12px rgba(229, 192, 123, 0.5);
    text-shadow: 0 0 8px #e5c07b;
}
[data-theme="technics-silver"] .dj-deck-panel,
[data-theme="technics-silver"] .dj-mixer-panel,
[data-theme="technics-silver"] .dj-modal-card,
[data-theme="technics-silver"] .settings-modal-card {
    background: #181d24 !important;
    border-color: rgba(229, 192, 123, 0.25) !important;
}
[data-theme="technics-silver"] .mixer-channel-strip,
[data-theme="technics-silver"] .deck-pads-side-bay,
[data-theme="technics-silver"] .smart-transitions-panel,
[data-theme="technics-silver"] .deck-fx-bar,
[data-theme="technics-silver"] .settings-group {
    background: #222832 !important;
    border-color: rgba(255, 255, 255, 0.12) !important;
}

/* Pioneer Onyx Full Background & Section Themes */
[data-theme="pioneer-onyx"] .niffty-header {
    background: linear-gradient(180deg, #161c27 0%, #0f131a 100%);
    border-bottom: 1px solid rgba(0, 136, 255, 0.35);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7), inset 0 -1px 0 rgba(0, 136, 255, 0.2);
}
[data-theme="pioneer-onyx"] .header-action-btn.nav-tab-item {
    background: linear-gradient(180deg, #1d2534 0%, #121822 100%);
    border-color: rgba(0, 136, 255, 0.25);
    border-top-color: rgba(255, 255, 255, 0.16);
}
[data-theme="pioneer-onyx"] .header-action-btn.nav-tab-item:hover,
[data-theme="pioneer-onyx"] .header-action-btn.nav-tab-item.active {
    border-color: #0088ff;
    box-shadow: 0 0 14px rgba(0, 136, 255, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
[data-theme="pioneer-onyx"] .view-mode-toggles,
[data-theme="pioneer-onyx"] .deck-mode-toggles,
[data-theme="pioneer-onyx"] .quantize-btn {
    background: #090b10;
    border-color: rgba(0, 136, 255, 0.25);
}
[data-theme="pioneer-onyx"] .header-toggle-btn.active {
    border-color: #0088ff;
    box-shadow: 0 0 12px rgba(0, 136, 255, 0.5);
    text-shadow: 0 0 8px #0088ff;
}
[data-theme="pioneer-onyx"] .dj-deck-panel,
[data-theme="pioneer-onyx"] .dj-mixer-panel,
[data-theme="pioneer-onyx"] .dj-modal-card,
[data-theme="pioneer-onyx"] .settings-modal-card {
    background: #0f131a !important;
    border-color: rgba(0, 136, 255, 0.25) !important;
}
[data-theme="pioneer-onyx"] .mixer-channel-strip,
[data-theme="pioneer-onyx"] .deck-pads-side-bay,
[data-theme="pioneer-onyx"] .smart-transitions-panel,
[data-theme="pioneer-onyx"] .deck-fx-bar,
[data-theme="pioneer-onyx"] .settings-group {
    background: #161c27 !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
}

/* Ghost Stealth Full Background & Section Themes */
[data-theme="ghost-stealth"] .niffty-header {
    background: linear-gradient(180deg, #1a1a1a 0%, #121212 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7), inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}
[data-theme="ghost-stealth"] .header-action-btn.nav-tab-item {
    background: linear-gradient(180deg, #222222 0%, #161616 100%);
    border-color: rgba(255, 255, 255, 0.15);
    border-top-color: rgba(255, 255, 255, 0.25);
}
[data-theme="ghost-stealth"] .header-action-btn.nav-tab-item:hover,
[data-theme="ghost-stealth"] .header-action-btn.nav-tab-item.active {
    border-color: #ffffff;
    box-shadow: 0 0 14px rgba(255, 255, 255, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}
[data-theme="ghost-stealth"] .view-mode-toggles,
[data-theme="ghost-stealth"] .deck-mode-toggles,
[data-theme="ghost-stealth"] .quantize-btn {
    background: #0a0a0a;
    border-color: rgba(255, 255, 255, 0.18);
}
[data-theme="ghost-stealth"] .header-toggle-btn.active {
    border-color: #ffffff;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
    text-shadow: 0 0 8px #ffffff;
}
[data-theme="ghost-stealth"] .dj-deck-panel,
[data-theme="ghost-stealth"] .dj-mixer-panel,
[data-theme="ghost-stealth"] .dj-modal-card,
[data-theme="ghost-stealth"] .settings-modal-card {
    background: #121212 !important;
    border-color: rgba(255, 255, 255, 0.18) !important;
}
[data-theme="ghost-stealth"] .mixer-channel-strip,
[data-theme="ghost-stealth"] .deck-pads-side-bay,
[data-theme="ghost-stealth"] .smart-transitions-panel,
[data-theme="ghost-stealth"] .deck-fx-bar,
[data-theme="ghost-stealth"] .settings-group {
    background: #1a1a1a !important;
    border-color: rgba(255, 255, 255, 0.14) !important;
}

/* Custom User Theme Full Background & Section Adaptability */
[data-theme="custom"] .niffty-header {
    background: linear-gradient(180deg, var(--bg-surface-elevated) 0%, var(--bg-surface) 100%);
    border-bottom: 1px solid var(--border-medium);
}
[data-theme="custom"] .header-action-btn.nav-tab-item {
    background: linear-gradient(180deg, var(--bg-surface-elevated) 0%, var(--bg-surface) 100%);
    border-color: var(--border-subtle);
}
[data-theme="custom"] .header-action-btn.nav-tab-item:hover,
[data-theme="custom"] .header-action-btn.nav-tab-item.active {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 14px var(--neon-cyan);
}
[data-theme="custom"] .view-mode-toggles,
[data-theme="custom"] .deck-mode-toggles,
[data-theme="custom"] .quantize-btn {
    background: var(--bg-deep-void);
    border-color: var(--border-medium);
}
[data-theme="custom"] .header-toggle-btn.active {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 12px var(--neon-cyan);
}
[data-theme="custom"] .dj-deck-panel,
[data-theme="custom"] .dj-mixer-panel,
[data-theme="custom"] .dj-modal-card,
[data-theme="custom"] .settings-modal-card {
    background: var(--bg-surface) !important;
    border-color: var(--border-medium) !important;
}
[data-theme="custom"] .mixer-channel-strip,
[data-theme="custom"] .deck-pads-side-bay,
[data-theme="custom"] .smart-transitions-panel,
[data-theme="custom"] .deck-fx-bar,
[data-theme="custom"] .settings-group {
    background: var(--bg-surface-elevated) !important;
    border-color: var(--border-subtle) !important;
}

/* ==========================================================================
   Custom Theme Creator Box
   ========================================================================== */
.custom-theme-creator-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 12px;
    margin-top: 4px;
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.custom-pickers-row {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    width: 100%;
    box-sizing: border-box;
}

.color-picker-item {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}

.color-picker-label {
    font-size: 10px;
    font-weight: 800;
    color: var(--text-muted);
    letter-spacing: 0.3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.color-picker-input-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-deep-void);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    padding: 3px 6px;
    box-sizing: border-box;
    min-width: 0;
}

.custom-color-input {
    width: 22px;
    height: 22px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    background: transparent;
    padding: 0;
    flex-shrink: 0;
}

.custom-color-hex {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.custom-base-shade-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 100%;
    box-sizing: border-box;
    margin-top: 4px;
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.base-shade-label-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: wrap;
}

.base-shade-desc {
    font-size: 9.5px;
    color: var(--text-muted);
}

.custom-base-select {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    min-width: 0;
    margin-top: 3px;
}

.custom-theme-actions {
    display: flex;
    gap: 8px;
    margin-top: 4px;
}

.custom-apply-btn {
    flex: 1;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    color: #000;
    font-weight: 900;
    font-size: 11px;
    border: none;
    border-radius: 4px;
    padding: 7px;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.custom-reset-btn {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
    font-weight: 800;
    font-size: 11px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    padding: 7px 12px;
    cursor: pointer;
}

/* ==========================================================================
   Ambient Glow Modes
   ========================================================================== */
[data-glow="subtle"] * {
    text-shadow: none !important;
}

[data-glow="subtle"] .header-action-btn:hover,
[data-glow="subtle"] .header-toggle-btn.active,
[data-glow="subtle"] .transport-btn.playing,
[data-glow="subtle"] .quantize-btn.active {
    box-shadow: 0 0 6px rgba(0, 242, 254, 0.25) !important;
}

[data-glow="off"] * {
    box-shadow: none !important;
    text-shadow: none !important;
    animation: none !important;
}

.install-pwa-btn {
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(247, 37, 133, 0.15));
    border: 1px solid rgba(0, 242, 254, 0.4);
    color: var(--neon-cyan);
    font-weight: 800;
    letter-spacing: 0.5px;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
    position: relative;
    overflow: hidden;
}

.install-pwa-btn .install-icon {
    font-size: 12px;
    animation: installBounce 2s infinite ease-in-out;
}

@keyframes installBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(2px); }
}

.install-pwa-btn:hover {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    color: #000;
    border-color: var(--neon-cyan);
    box-shadow: 0 0 16px rgba(0, 242, 254, 0.6);
}

.install-pwa-btn.installed {
    border-color: rgba(5, 255, 161, 0.4);
    color: var(--neon-emerald);
    background: rgba(5, 255, 161, 0.1);
    cursor: default;
}

.record-hud-btn {
    border-color: rgba(255, 0, 85, 0.4);
    color: var(--neon-crimson);
}

.record-hud-btn.recording {
    background-color: var(--neon-crimson);
    color: #fff;
    box-shadow: 0 0 16px rgba(255, 0, 85, 0.6);
    animation: recPulse 1.2s infinite;
}

.rec-icon {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: currentColor;
}

@keyframes recPulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
    100% { opacity: 1; transform: scale(1); }
}

/* Main Workspace Layout Grid */
.dj-workspace-grid {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 52px);
    overflow: hidden;
    position: relative;
    min-height: 0;
}

/* Waveforms Zone */
.waveforms-master-zone {
    background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-primary) 100%);
    border-bottom: 1px solid var(--border-medium);
    padding: 2px 12px;
    height: 76px;
    flex-shrink: 0;
}

/* Serato Multi-FX Rack Bar Collapsible Toggle */
body.fx-rack-collapsed .deck-fx-bar {
    display: none !important;
}

/* Decks & Center Mixer Zone (Takes up the majority of the canvas) */
.decks-and-mixer-zone {
    display: grid;
    grid-template-columns: 1fr 310px 1fr;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-medium);
    flex: 1;
    min-height: 0;
    position: relative;
    overflow: hidden;
}

@media (max-width: 1400px) {
    .decks-and-mixer-zone {
        grid-template-columns: 1fr 270px 1fr;
    }
}

@media (max-width: 1120px) {
    .decks-and-mixer-zone {
        grid-template-columns: 1fr 230px 1fr;
    }
}

/* Interactive Drag-to-Resize Splitter Handle Bar */
.library-splitter-bar {
    height: 12px;
    background: linear-gradient(180deg, var(--bg-surface-elevated) 0%, var(--bg-surface) 100%);
    border-top: 1px solid var(--border-medium);
    border-bottom: 1px solid var(--border-subtle);
    cursor: row-resize;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    -webkit-user-select: none;
    flex-shrink: 0;
    z-index: 30;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.library-splitter-bar:hover, .library-splitter-bar.dragging {
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    border-top-color: var(--neon-cyan);
    box-shadow: 0 0 12px rgba(0, 242, 254, 0.4);
}

.splitter-grip {
    display: flex;
    align-items: center;
    gap: 8px;
    pointer-events: none;
}

.splitter-dots {
    width: 28px;
    height: 2px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 1px;
}

.library-splitter-bar:hover .splitter-dots,
.library-splitter-bar.dragging .splitter-dots {
    background: var(--neon-cyan);
    box-shadow: 0 0 6px var(--neon-cyan);
}

.splitter-label {
    font-size: 8px;
    font-weight: 900;
    letter-spacing: 1.2px;
    color: var(--text-muted);
}

.library-splitter-bar:hover .splitter-label,
.library-splitter-bar.dragging .splitter-label {
    color: var(--neon-cyan);
}

/* Library Zone (Fills user-selected height with independent internal scrolling) */
.library-section {
    height: 165px; /* Compact default height - resizable by user */
    min-height: 80px;
    max-height: calc(100vh - 200px);
    background-color: var(--bg-deep-void);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: relative;
    z-index: 10;
}

/* ==========================================================================
   Custom Cybernetic Neon Scrollbars (Serato Pro DJ Aesthetic)
   ========================================================================== */

/* Universal standard scrollbar properties (Firefox & Modern Standards) */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 242, 254, 0.3) #05080e;
}

/* WebKit & Chromium Custom Scrollbars */
::-webkit-scrollbar {
    width: 7px;
    height: 7px;
}

::-webkit-scrollbar-track {
    background: #05080e;
    border-radius: 4px;
    box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.8);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(0, 242, 254, 0.35), rgba(79, 172, 254, 0.35));
    border-radius: 4px;
    border: 1px solid rgba(0, 242, 254, 0.2);
    transition: all 0.2s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--neon-cyan), var(--neon-blue));
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.7);
}

::-webkit-scrollbar-thumb:active {
    background: var(--neon-cyan);
    box-shadow: 0 0 14px rgba(0, 242, 254, 0.9);
}

::-webkit-scrollbar-corner {
    background: #05080e;
}

/* Library Table Custom Scrollbar */
.track-table-scrollable::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.track-table-scrollable::-webkit-scrollbar-track {
    background: #04070d;
    border-left: 1px solid rgba(255, 255, 255, 0.05);
}

.track-table-scrollable::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(0, 242, 254, 0.4), rgba(5, 255, 161, 0.4));
    border-radius: 4px;
    border: 1px solid rgba(0, 242, 254, 0.25);
}

.track-table-scrollable::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--neon-cyan), var(--neon-emerald));
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.8);
}

/* Crate List Scrollbar */
.crate-list::-webkit-scrollbar {
    width: 5px;
}

.crate-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}

.crate-list::-webkit-scrollbar-thumb:hover {
    background: var(--neon-cyan);
    box-shadow: 0 0 6px var(--neon-cyan);
}

/* ==========================================================================
   Responsive Architecture & Mobile-Ready DJ Suite
   Universal Fit for Smartphones, Tablets, Laptops & High-DPI Displays
   ========================================================================== */

/* 1. Mobile Multi-View Switcher Bar (Hidden on Desktop, Visible <= 768px) */
.mobile-view-nav {
    display: none;
}

/* 2. Mobile Quick-Crossfader Dock (Hidden on Desktop, Visible <= 768px) */
.mobile-deck-quick-xfader {
    display: none;
}

/* Tablet & Smaller Laptops (<= 1120px) */
@media (max-width: 1120px) {
    .niffty-header {
        padding: 0 8px;
    }
    .brand-subtext {
        display: none;
    }
    .decks-and-mixer-zone {
        grid-template-columns: 1fr 210px 1fr;
    }
}

/* Small Tablets & Large Phones in Landscape (<= 920px) */
@media (max-width: 920px) {
    .hardware-status-hud {
        display: none;
    }
    .header-action-btn.nav-tab-item {
        padding: 5px 8px;
    }
    .nav-tab-label {
        font-size: 9px;
    }
    .decks-and-mixer-zone {
        grid-template-columns: 1fr 180px 1fr;
    }
}

/* ==========================================================================
   Mobile Devices & Narrow Screens (<= 768px)
   Activates Touch-Optimized Single Deck / Mixer / Crate Multi-View Engine
   ========================================================================== */
@media (max-width: 768px) {
    /* Responsive Viewport & Header */
    .niffty-header {
        height: 44px;
        padding: 0 max(8px, env(safe-area-inset-right)) 0 max(8px, env(safe-area-inset-left));
        gap: 6px;
    }

    .brand-dj-icon {
        width: 28px;
        height: 28px;
    }
    .brand-dj-svg {
        width: 28px;
        height: 28px;
    }
    .brand-title {
        font-size: 13px;
    }
    .brand-beta-tag {
        display: none;
    }

    .header-center-tools {
        gap: 4px;
    }
    .deck-mode-toggles, .view-mode-toggles {
        height: 26px;
    }
    .header-toggle-btn {
        font-size: 8px;
        padding: 0 5px;
    }

    /* Header Action Tabs: Icon-Only Compact Mode for Phones */
    .header-right-actions {
        gap: 3px;
    }
    .header-action-btn.nav-tab-item {
        padding: 4px 6px;
        height: 28px;
        min-width: 30px;
        justify-content: center;
    }
    .nav-tab-label,
    .hamburger-label {
        display: none !important; /* Hide text label on mobile so all buttons fit cleanly */
    }
    .nav-tab-icon {
        margin: 0;
    }
    .record-hud-btn .rec-icon {
        margin: 0;
    }
    #record-btn-text {
        display: none;
    }

    /* Waveforms: Reduced height for maximum deck workspace */
    .waveforms-master-zone {
        height: 72px;
        min-height: 72px;
    }
    .phase-match-meter {
        height: 7px;
    }
    .waveform-zoom-controls {
        transform: scale(0.85);
        right: 4px;
        bottom: 4px;
    }

    /* Mobile Multi-View Switcher Bar */
    .mobile-view-nav {
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: var(--bg-surface);
        border-bottom: 1px solid var(--border-medium);
        padding: 3px 6px;
        gap: 4px;
        height: 38px;
        flex-shrink: 0;
        z-index: 25;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    }

    .mobile-nav-tab {
        flex: 1;
        height: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 4px;
        background: var(--bg-surface-elevated);
        border: 1px solid var(--border-subtle);
        border-radius: 4px;
        color: var(--text-secondary);
        font-family: var(--font-sans);
        font-size: 9.5px;
        font-weight: 800;
        letter-spacing: 0.5px;
        cursor: pointer;
        padding: 0 4px;
        transition: all 0.15s ease;
        touch-action: manipulation;
    }

    .mobile-nav-tab:active {
        transform: scale(0.97);
    }

    .tab-badge-dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        display: inline-block;
    }
    .deck-1-dot { background: var(--neon-cyan); box-shadow: 0 0 6px var(--neon-cyan); }
    .deck-2-dot { background: var(--neon-magenta); box-shadow: 0 0 6px var(--neon-magenta); }

    .mobile-nav-tab.active {
        color: #000;
        background: var(--neon-cyan);
        border-color: var(--neon-cyan);
        box-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
    }
    .mobile-nav-tab.active .tab-badge-dot {
        background: #000;
        box-shadow: none;
    }

    .mobile-nav-tab[data-view="deck-1"].active {
        background: var(--neon-magenta);
        border-color: var(--neon-magenta);
        box-shadow: 0 0 10px rgba(247, 37, 133, 0.4);
    }

    .mobile-nav-tab[data-view="mixer"].active {
        background: var(--neon-emerald);
        border-color: var(--neon-emerald);
        box-shadow: 0 0 10px rgba(5, 255, 161, 0.4);
    }

    .mobile-nav-tab[data-view="dual"].active {
        background: var(--neon-blue);
        border-color: var(--neon-blue);
        box-shadow: 0 0 10px rgba(79, 172, 254, 0.4);
    }

    .mobile-nav-tab[data-view="library"].active {
        background: var(--neon-amber);
        border-color: var(--neon-amber);
        box-shadow: 0 0 10px rgba(255, 190, 11, 0.4);
    }

    /* Decks & Mixer Zone Switcher Logic */
    .decks-and-mixer-zone {
        display: flex;
        flex-direction: column;
        flex: 1;
        min-height: 0;
        overflow-y: auto;
        overflow-x: hidden;
    }

    /* Default or Deck 1 View */
    body:not([data-mobile-view]) .decks-and-mixer-zone .dj-deck-panel[data-deck="0"],
    body[data-mobile-view="deck-0"] .decks-and-mixer-zone .dj-deck-panel[data-deck="0"] {
        display: flex !important;
        flex: 1;
        width: 100%;
        min-height: 0;
    }
    body:not([data-mobile-view]) .decks-and-mixer-zone .dj-mixer-panel,
    body[data-mobile-view="deck-0"] .decks-and-mixer-zone .dj-mixer-panel,
    body:not([data-mobile-view]) .decks-and-mixer-zone .dj-deck-panel[data-deck="1"],
    body[data-mobile-view="deck-0"] .decks-and-mixer-zone .dj-deck-panel[data-deck="1"] {
        display: none !important;
    }

    /* Deck 2 View */
    body[data-mobile-view="deck-1"] .decks-and-mixer-zone .dj-deck-panel[data-deck="1"] {
        display: flex !important;
        flex: 1;
        width: 100%;
        min-height: 0;
    }
    body[data-mobile-view="deck-1"] .decks-and-mixer-zone .dj-deck-panel[data-deck="0"],
    body[data-mobile-view="deck-1"] .decks-and-mixer-zone .dj-mixer-panel {
        display: none !important;
    }

    /* Full Mixer View */
    body[data-mobile-view="mixer"] .decks-and-mixer-zone .dj-mixer-panel {
        display: flex !important;
        flex: 1;
        width: 100%;
        max-width: 480px;
        margin: 0 auto;
        min-height: 0;
        overflow-y: auto;
    }
    body[data-mobile-view="mixer"] .decks-and-mixer-zone .dj-deck-panel {
        display: none !important;
    }

    /* Dual Mode (Stacked Decks) */
    body[data-mobile-view="dual"] .decks-and-mixer-zone {
        display: flex !important;
        flex-direction: column;
        overflow-y: auto;
    }
    body[data-mobile-view="dual"] .decks-and-mixer-zone .dj-deck-panel {
        display: flex !important;
        min-height: 240px;
        flex-shrink: 0;
    }
    body[data-mobile-view="dual"] .decks-and-mixer-zone .dj-mixer-panel {
        display: flex !important;
        min-height: 190px;
        flex-shrink: 0;
    }

    /* Full Library View */
    body[data-mobile-view="library"] .decks-and-mixer-zone {
        display: none !important;
    }
    body[data-mobile-view="library"] .library-splitter-bar {
        display: none !important;
    }
    body[data-mobile-view="library"] .library-section {
        display: flex !important;
        flex: 1 !important;
        height: auto !important;
        max-height: none !important;
    }

    /* In Deck Views, Collapse Library Section to maximize deck space */
    body:not([data-mobile-view="library"]) .library-section {
        height: 60px;
        min-height: 50px;
    }
    body:not([data-mobile-view="library"]) .crate-sidebar {
        display: none;
    }

    /* Deck Internal 3-Column Scaling on Mobile */
    .deck-main-performance-zone {
        gap: 4px;
        padding: 2px 0;
    }
    .deck-pads-side-bay {
        min-width: 120px;
        flex: 1.1;
        max-width: none;
        padding: 2px;
    }
    .deck-center-platter-bay {
        flex: 1.8;
        min-width: 135px;
    }
    .pitch-fader-column {
        width: 38px;
        padding: 2px;
    }
    .pitch-bend-btn {
        height: 16px;
        font-size: 10px;
    }
    .pitch-readout-row {
        font-size: 7.5px;
    }
    .transport-cue-btn, .transport-play-btn {
        min-height: 38px;
        font-size: 11px;
    }
    .transport-sync-btn {
        min-height: 22px;
    }

    /* Mobile Quick-Crossfader Dock on Deck Panels */
    .mobile-deck-quick-xfader {
        display: flex;
        align-items: center;
        gap: 8px;
        background: var(--bg-deep-void);
        border: 1px solid var(--border-medium);
        border-radius: 5px;
        padding: 4px 8px;
        margin-top: 3px;
        flex-shrink: 0;
    }
    .quick-xf-tag {
        font-size: 9px;
        font-weight: 900;
        font-family: var(--font-mono);
        padding: 2px 4px;
        border-radius: 3px;
    }
    .quick-xf-tag.d1 {
        background: rgba(0, 242, 254, 0.15);
        color: var(--neon-cyan);
        border: 1px solid rgba(0, 242, 254, 0.3);
    }
    .quick-xf-tag.d2 {
        background: rgba(247, 37, 133, 0.15);
        color: var(--neon-magenta);
        border: 1px solid rgba(247, 37, 133, 0.3);
    }
    .mobile-xf-track {
        flex: 1;
        display: flex;
        align-items: center;
    }
    .mobile-xfader-slider {
        width: 100%;
        height: 18px;
        appearance: none;
        -webkit-appearance: none;
        background: transparent;
        cursor: pointer;
        touch-action: pan-y;
    }
    .mobile-xfader-slider::-webkit-slider-runnable-track {
        height: 6px;
        background: #111827;
        border-radius: 3px;
        border: 1px solid var(--border-subtle);
    }
    .mobile-xfader-slider::-webkit-slider-thumb {
        appearance: none;
        -webkit-appearance: none;
        width: 22px;
        height: 18px;
        margin-top: -6px;
        background: linear-gradient(180deg, #f8fafc 0%, #cbd5e1 100%);
        border: 1px solid #000;
        border-radius: 3px;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
    }

    /* Preferences Settings Modal on Mobile */
    .settings-modal-card {
        width: 96vw !important;
        max-width: 96vw !important;
        max-height: 92dvh !important;
    }
    .settings-modal-layout {
        flex-direction: column !important;
    }
    .settings-sidebar {
        flex-direction: row !important;
        width: 100% !important;
        overflow-x: auto !important;
        flex-shrink: 0 !important;
        padding: 4px !important;
        gap: 3px !important;
        border-right: none !important;
        border-bottom: 1px solid var(--border-subtle) !important;
        -webkit-overflow-scrolling: touch;
    }
    .settings-tab-btn {
        flex-direction: row !important;
        padding: 6px 10px !important;
        font-size: 10px !important;
        white-space: nowrap !important;
        height: 28px !important;
    }
    .settings-content-area {
        max-height: calc(92dvh - 130px) !important;
        overflow-y: auto !important;
        padding: 10px !important;
    }
}

/* ==========================================================================
   Responsive Hamburger Navigation Drawer & Mobile Controls
   ========================================================================== */
.hamburger-nav-btn {
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    gap: 7px !important;
    height: 33px;
    min-width: auto !important;
    padding: 0 10px;
    cursor: pointer;
    position: relative;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    border-color: rgba(0, 242, 254, 0.35) !important;
}

.hamburger-box {
    width: 18px !important;
    min-width: 18px !important;
    max-width: 18px !important;
    height: 14px !important;
    position: relative;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    flex-shrink: 0 !important;
    margin: 0 !important;
}

.hamburger-inner, 
.hamburger-inner::before, 
.hamburger-inner::after {
    width: 18px !important;
    height: 2px !important;
    background-color: var(--neon-cyan, #00f2fe);
    border-radius: 2px;
    position: absolute;
    left: 0;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 6px rgba(0, 242, 254, 0.6);
}

.hamburger-inner {
    top: 6px;
}

.hamburger-inner::before {
    content: '';
    top: -6px;
    left: 0;
}

.hamburger-inner::after {
    content: '';
    bottom: -6px;
    left: 0;
}

.hamburger-label {
    display: inline-block;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    line-height: 1;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.8px;
    color: var(--text-primary, #ffffff);
    margin: 0 !important;
    padding: 0 !important;
}

/* Animated Transform to X when open */
.hamburger-nav-btn.active .hamburger-inner {
    background-color: transparent !important;
    box-shadow: none !important;
}

.hamburger-nav-btn.active .hamburger-inner::before {
    transform: translateY(5px) rotate(45deg);
    background-color: var(--neon-magenta, #f72585);
    box-shadow: 0 0 6px rgba(247, 37, 133, 0.8);
}

.hamburger-nav-btn.active .hamburger-inner::after {
    transform: translateY(-5px) rotate(-45deg);
    background-color: var(--neon-magenta, #f72585);
    box-shadow: 0 0 6px rgba(247, 37, 133, 0.8);
}

/* Hamburger Drawer Overlay */
.header-hamburger-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    z-index: 99998;
    display: flex;
    justify-content: flex-end;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.header-hamburger-drawer.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.hamburger-drawer-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(3, 5, 8, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.hamburger-drawer-panel {
    position: relative;
    width: 360px;
    max-width: 88vw;
    height: 100%;
    background: linear-gradient(180deg, var(--bg-surface-elevated, #131b29) 0%, var(--bg-surface, #0d121c) 100%);
    border-left: 1px solid var(--border-medium, rgba(255, 255, 255, 0.14));
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.8), 0 0 30px rgba(0, 242, 254, 0.1);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    z-index: 10;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-hamburger-drawer.open .hamburger-drawer-panel {
    transform: translateX(0);
}

.hamburger-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: rgba(2, 6, 23, 0.6);
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.hamburger-drawer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.hamburger-brand-pill {
    font-size: 9px;
    font-weight: 800;
    letter-spacing: 0.8px;
    padding: 2px 7px;
    border-radius: 4px;
    background: rgba(0, 242, 254, 0.15);
    color: var(--neon-cyan);
    border: 1px solid rgba(0, 242, 254, 0.35);
}

.hamburger-drawer-close {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.hamburger-drawer-close:hover {
    border-color: var(--neon-magenta);
    color: #fff;
    background: rgba(247, 37, 133, 0.2);
}

.hamburger-drawer-content {
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.hamburger-section-title {
    font-family: 'Rajdhani', var(--font-sans);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1.2px;
    color: var(--neon-cyan);
    text-transform: uppercase;
}

.hamburger-quick-toggles {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: rgba(2, 6, 23, 0.5);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 12px;
}

.hamburger-toggle-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.toggle-group-label {
    font-size: 10.5px;
    font-weight: 700;
    color: var(--text-muted);
}

.hamburger-pill-group {
    display: flex;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 5px;
    padding: 2px;
    gap: 2px;
}

.hamburger-pill-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.hamburger-pill-btn.active {
    background: var(--neon-cyan);
    color: #000;
    font-weight: 900;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
}

.hamburger-nav-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hamburger-nav-row {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.hamburger-nav-row:hover {
    background: var(--bg-surface-active);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 12px rgba(0, 242, 254, 0.25);
    transform: translateX(-2px);
}

.nav-row-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-row-icon {
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.04);
}

.nav-row-title {
    font-family: 'Rajdhani', var(--font-sans);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.8px;
}

.nav-row-desc {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 2px;
}

.nav-row-badge {
    font-size: 9.5px;
    font-weight: 800;
    letter-spacing: 0.6px;
    padding: 3px 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
}

.nav-row-badge.ai-badge {
    background: rgba(0, 242, 254, 0.15);
    color: var(--neon-cyan);
    border: 1px solid rgba(0, 242, 254, 0.35);
}

.nav-row-badge.ai-badge.engaged {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
    border-color: rgba(16, 185, 129, 0.5);
    animation: pulseIcon 1.5s infinite ease-in-out;
}

.nav-row-arrow {
    color: var(--text-muted);
    font-size: 12px;
    transition: transform 0.15s ease;
}

.hamburger-nav-row:hover .nav-row-arrow {
    transform: translateX(3px);
    color: var(--neon-cyan);
}

/* ==========================================================================
   Rotate Phone to Landscape Overlay (Phone on its side for use)
   ========================================================================== */
.rotate-device-overlay {
    display: none;
}

@media (max-width: 820px) and (orientation: portrait) {
    body:not(.bypass-rotate-prompt) .rotate-device-overlay {
        display: flex !important;
        position: fixed;
        inset: 0;
        z-index: 100000;
        background: radial-gradient(circle at 50% 35%, rgba(13, 20, 33, 0.98) 0%, rgba(3, 5, 8, 0.99) 100%);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 24px;
        text-align: center;
    }
}

.rotate-content-box {
    max-width: 380px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.rotate-icon-animation {
    position: relative;
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
}

.rotate-phone-icon {
    width: 44px;
    height: 76px;
    border: 2.5px solid var(--neon-cyan);
    border-radius: 8px;
    position: relative;
    box-shadow: 0 0 20px rgba(0, 242, 254, 0.5), inset 0 0 10px rgba(0, 242, 254, 0.2);
    animation: rotatePhoneAnim 3.2s infinite ease-in-out;
    background: rgba(13, 18, 28, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

@keyframes rotatePhoneAnim {
    0%, 20% {
        transform: rotate(0deg);
    }
    45%, 75% {
        transform: rotate(-90deg);
    }
    90%, 100% {
        transform: rotate(0deg);
    }
}

.phone-notch {
    position: absolute;
    top: 4px;
    width: 14px;
    height: 2px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 2px;
}

.phone-screen {
    width: 32px;
    height: 58px;
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 2px;
}

.phone-deck-left, .phone-deck-right {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    border: 1px solid var(--neon-cyan);
    background: rgba(0, 242, 254, 0.3);
}

.phone-deck-right {
    border-color: var(--neon-magenta);
    background: rgba(247, 37, 133, 0.3);
}

.phone-mixer-center {
    width: 4px;
    height: 18px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

.rotate-arrow-indicator {
    position: absolute;
    bottom: -6px;
    right: -6px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--neon-magenta);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 14px rgba(247, 37, 133, 0.7);
}

.rotate-title {
    font-family: 'Orbitron', 'Rajdhani', sans-serif;
    font-size: 19px;
    font-weight: 900;
    letter-spacing: 2px;
    background: linear-gradient(90deg, #00f2fe, #f72585);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.rotate-badge {
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1px;
    padding: 4px 10px;
    border-radius: 4px;
    background: rgba(247, 37, 133, 0.15);
    color: var(--neon-magenta);
    border: 1px solid rgba(247, 37, 133, 0.4);
}

.rotate-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.rotate-action-row {
    margin-top: 8px;
}

.rotate-bypass-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 700;
    padding: 8px 18px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.rotate-bypass-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border-color: var(--neon-cyan);
}

/* ==========================================================================
   Responsive Breakpoints: Small Displays & Mobile Landscape
   ========================================================================== */
#header-mobile-library-btn {
    display: none;
}

@media (max-width: 980px) {
    .hamburger-nav-btn {
        display: inline-flex !important;
    }
    #header-mobile-library-btn {
        display: inline-flex !important;
    }
    /* Hide secondary buttons to keep header clean and prevent overflowing */
    #toggle-fx-rack-btn,
    #open-sampler-rack-btn,
    #toggle-midi-monitor-btn,
    #fullscreen-toggle-btn,
    #general-settings-btn {
        display: none !important;
    }
}

@media (max-width: 680px) {
    #record-mix-btn {
        display: none !important;
    }
    .header-center-tools {
        display: none !important;
    }
}

/* Mobile Landscape Mode (Phones turned horizontally - Guaranteed Fit to Canvas) */
@media (max-height: 520px) and (orientation: landscape) {
    html, body, .dj-workspace-grid {
        height: 100vh !important;
        height: 100dvh !important;
        max-height: 100dvh !important;
        overflow: hidden !important;
    }
    .niffty-header {
        height: 34px !important;
        padding: 0 8px !important;
    }
    .brand-dj-icon {
        width: 22px !important;
        height: 22px !important;
    }
    .brand-title {
        font-size: 11px !important;
    }
    .hamburger-nav-btn {
        display: inline-flex !important;
        flex-direction: row !important;
        align-items: center !important;
        justify-content: center !important;
        height: 26px !important;
        padding: 0 8px !important;
        min-width: 34px !important;
        gap: 0 !important;
    }
    .hamburger-nav-btn .hamburger-label {
        display: none !important; /* Icon-only in mobile landscape: zero text overlap */
    }
    #header-mobile-library-btn {
        display: inline-flex !important;
        height: 26px !important;
        padding: 0 8px !important;
        font-size: 9.5px !important;
    }
    #ai-takeover-toggle-btn {
        height: 26px !important;
        padding: 0 8px !important;
        font-size: 9.5px !important;
    }
    .header-center-tools {
        display: none !important;
    }
    .waveforms-master-zone {
        height: 38px !important;
        min-height: 38px !important;
    }
    .mobile-view-nav {
        display: none !important;
    }
    .decks-and-mixer-zone {
        display: grid !important;
        grid-template-columns: 1fr 140px 1fr !important;
        flex: 1 !important;
        height: calc(100dvh - 78px) !important;
        min-height: 0 !important;
        overflow: hidden !important;
    }
    .dj-deck-panel[data-deck="0"],
    .dj-deck-panel[data-deck="1"],
    .dj-mixer-panel {
        display: flex !important;
        min-height: 0 !important;
        overflow: hidden !important;
    }
    .deck-pads-side-bay {
        min-width: 100px !important;
        padding: 1px !important;
    }
    .mpc-pad-btn {
        height: 18px !important;
        min-height: 18px !important;
        font-size: 7px !important;
    }
    .deck-center-platter-bay {
        min-width: 110px !important;
    }
    .pitch-fader-column {
        width: 32px !important;
    }
    .library-splitter-bar {
        height: 8px !important;
        cursor: pointer !important;
    }
    .library-section:not(.mobile-drawer-open) {
        height: 0px !important;
        min-height: 0px !important;
        display: none !important;
    }
    .mobile-deck-quick-xfader {
        display: none !important;
    }
}