/* ================================
   VOICE STACK - Minimal DAW UI
   OpenDAW-inspired design
================================ */

/* ---------- VARIABLES ---------- */
:root {
    --vs-bg: #0a0a0f;
    --vs-bg-dark: #060609;
    --vs-bg-panel: #12121a;
    --vs-bg-hover: #1a1a24;
    --vs-border: #252530;
    --vs-border-light: #333340;
    --vs-text: #e0e0e8;
    --vs-text-dim: #808090;
    --vs-accent: #00d4aa;
    --vs-accent-dim: #00a080;
    --vs-rec: #ff4444;
    --vs-track-h: 100px;
    --vs-track-info-w: 220px;
}

/* ---------- PAGE ---------- */
.voice-stack-page {
    /* Fit within .main container accounting for header and main padding */
    height: calc(100vh - var(--header-height, 52px) - var(--space-4, 0.8rem) * 2);
    height: calc(100dvh - var(--header-height, 52px) - var(--space-4, 0.8rem) * 2);
    max-height: calc(100vh - var(--header-height, 52px) - var(--space-4, 0.8rem) * 2);
    max-height: calc(100dvh - var(--header-height, 52px) - var(--space-4, 0.8rem) * 2);
    overflow: hidden;
    background: var(--vs-bg);
    border-radius: var(--border-radius-lg, 0.6rem);
}

.vs-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--vs-bg);
    border-radius: inherit;
    overflow: hidden;
}

/* ---------- TOP BAR ---------- */
.vs-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 40px;
    padding: 0 12px;
    background: var(--vs-bg-panel);
    border-bottom: 1px solid var(--vs-border);
    flex-shrink: 0;
    gap: 8px;
}

.vs-topbar-left,
.vs-topbar-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.vs-logo {
    font-size: 13px;
    font-weight: 600;
    color: var(--vs-accent);
    letter-spacing: 0.5px;
}

.vs-sep {
    width: 1px;
    height: 20px;
    background: var(--vs-border);
    margin: 0 2px;
}

/* Transport & Tool Buttons */
.vs-transport-btns,
.vs-tool-btns {
    display: flex;
    gap: 2px;
}

.vs-tb {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--vs-text-dim);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 0.1s;
}

.vs-tb:hover {
    background: var(--vs-bg-hover);
    color: var(--vs-text);
}

.vs-tb.active {
    background: var(--vs-accent);
    color: #000;
}

.vs-tb:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.vs-tb-rec {
    color: var(--vs-rec);
}

.vs-tb-rec:hover {
    background: rgba(255, 68, 68, 0.15);
}

.vs-tb-rec.recording {
    background: var(--vs-rec);
    color: #fff;
    animation: pulse-rec 0.8s infinite;
}

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

/* Time Display */
.vs-time-box {
    background: var(--vs-bg-dark);
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid var(--vs-border);
}

.vs-time {
    font-family: 'Fira Code', monospace;
    font-size: 13px;
    font-weight: 500;
    color: var(--vs-accent);
    letter-spacing: 0.5px;
}

/* BPM */
.vs-bpm-box {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--vs-text-dim);
}

.vs-bpm-box input {
    width: 42px;
    padding: 3px 4px;
    background: var(--vs-bg-dark);
    border: 1px solid var(--vs-border);
    border-radius: 3px;
    color: var(--vs-text);
    font-size: 11px;
    text-align: center;
}

.vs-bpm-box input:focus {
    outline: none;
    border-color: var(--vs-accent);
}

/* Metronome */
.vs-metro-box {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--vs-text-dim);
    font-size: 11px;
}

.vs-metro-box input[type="range"] {
    width: 50px;
    height: 3px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--vs-border);
    border-radius: 2px;
    cursor: pointer;
}

.vs-metro-box input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--vs-text-dim);
    cursor: pointer;
}

.vs-metro-box input[type="range"]::-moz-range-thumb {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--vs-text-dim);
    cursor: pointer;
    border: none;
}

/* Preroll */
.vs-preroll-box {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--vs-text-dim);
}

.vs-preroll-box input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: var(--vs-accent);
    cursor: pointer;
}

.vs-preroll-box select {
    width: 36px;
    padding: 2px 4px;
    background: var(--vs-bg-dark);
    border: 1px solid var(--vs-border);
    border-radius: 3px;
    color: var(--vs-text);
    font-size: 11px;
}

.vs-preroll-box select:disabled {
    opacity: 0.4;
}

/* Latency Box */
.vs-latency-box {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--vs-text-dim);
}

.vs-latency-box input {
    width: 40px;
    padding: 3px 4px;
    background: var(--vs-bg-dark);
    border: 1px solid var(--vs-border);
    border-radius: 3px;
    color: var(--vs-text);
    font-size: 11px;
    text-align: right;
    -moz-appearance: textfield;
    appearance: textfield;
}

.vs-latency-box input::-webkit-outer-spin-button,
.vs-latency-box input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

/* Zoom Box */
.vs-zoom-box {
    display: flex;
    align-items: center;
    gap: 4px;
}

.vs-zoom-box input[type="range"] {
    width: 60px;
    height: 3px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--vs-border);
    border-radius: 2px;
    cursor: pointer;
}

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

.vs-zoom-box input[type="range"]::-moz-range-thumb {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--vs-accent);
    cursor: pointer;
    border: none;
}

/* ---------- TIMELINE AREA ---------- */
.vs-timeline-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--vs-bg-dark);
    overflow: hidden;
}

/* Ruler */
.vs-ruler-bar {
    height: 28px;
    background: var(--vs-bg-panel);
    border-bottom: 1px solid var(--vs-border);
    flex-shrink: 0;
    display: flex;
    overflow: hidden;
}

.vs-ruler-header {
    width: var(--vs-track-info-w);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--vs-bg-panel);
    /* Keep header fixed while timeline scrolls */
    position: sticky;
    left: 0;
    z-index: 15;
}

.vs-load-audio-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: transparent;
    border: 1px solid var(--vs-border);
    border-radius: 4px;
    color: var(--vs-text-dim);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.15s;
}

.vs-load-audio-btn:hover:not(.disabled) {
    border-color: var(--vs-accent);
    color: var(--vs-accent);
    background: rgba(0, 212, 170, 0.05);
}

.vs-load-audio-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.vs-load-audio-btn i {
    font-size: 11px;
}

.vs-ruler-spacer {
    width: var(--vs-track-info-w);
    flex-shrink: 0;
    border-right: 1px solid var(--vs-border);
}

.vs-time-ruler {
    flex: 1;
    border-left: 2px solid #4a4a5a;
    height: 100%;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    user-select: none;
}

.vs-time-ruler:hover {
    background: rgba(255, 255, 255, 0.02);
}

.vs-time-ruler:active {
    background: rgba(255, 255, 255, 0.05);
}

.vs-ruler-content {
    position: absolute;
    height: 100%;
}

.vs-ruler-mark {
    position: absolute;
    top: 14px;
    bottom: 0;
    width: 1px;
    background: var(--vs-border);
}

.vs-ruler-mark-major {
    top: 0;
    background: var(--vs-border-light);
}

.vs-ruler-label {
    position: absolute;
    top: 4px;
    left: 4px;
    font-size: 9px;
    color: var(--vs-text-dim);
    font-family: 'Fira Code', monospace;
}

/* Timeline */
.vs-timeline {
    flex: 1;
    position: relative;
    overflow: auto;
    scrollbar-width: none;
}

.vs-timeline::-webkit-scrollbar {
    display: none;
}

.vs-tracks {
    position: relative;
    min-height: 100%;
    background: var(--vs-bg-dark);
}

/* Add Track Row */
.vs-add-track-row {
    display: flex;
    background: var(--vs-bg-dark);
    border-bottom: 1px solid var(--vs-border);
    min-height: 44px;
    /* Position relative so it stays in document flow within vs-tracks */
}

.vs-add-track-cell {
    width: var(--vs-track-info-w);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    background: var(--vs-bg-panel);
    /* Keep add track button fixed while timeline scrolls */
    position: sticky;
    left: 0;
    z-index: 10;
}

.vs-add-track-space {
    flex: 1;
    background: var(--vs-bg-dark);
    border-left: 2px solid #4a4a5a;
}

.vs-add-track-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: transparent;
    border: 1px dashed var(--vs-border);
    border-radius: 4px;
    color: var(--vs-text-dim);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.15s;
    width: 100%;
    justify-content: center;
}

.vs-add-track-btn:hover {
    border-color: var(--vs-accent);
    color: var(--vs-accent);
    background: rgba(0, 212, 170, 0.05);
}

.vs-add-track-btn i {
    font-size: 10px;
}

/* Playhead - z-index lower than sticky track controls (z-index: 10) */
.vs-playhead {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--vs-accent);
    z-index: 8;
    pointer-events: none;
}


.vs-playhead::before {
    content: '';
    position: absolute;
    top: 0;
    left: -5px;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 8px solid var(--vs-accent);
}

/* Horizontal Scroll */
.vs-hscroll {
    height: 10px;
    background: var(--vs-bg-panel);
    border-top: 1px solid var(--vs-border);
    padding: 2px 4px;
    padding-left: calc(var(--vs-track-info-w) + 4px);
    flex-shrink: 0;
}

.vs-hscroll-track {
    height: 6px;
    background: var(--vs-bg-dark);
    border-radius: 3px;
    position: relative;
}

.vs-hscroll-thumb {
    position: absolute;
    top: 0;
    height: 6px;
    min-width: 40px;
    background: var(--vs-border-light);
    border-radius: 3px;
    cursor: grab;
}

.vs-hscroll-thumb:hover {
    background: var(--vs-text-dim);
}

.vs-hscroll-thumb.dragging {
    background: var(--vs-accent);
    cursor: grabbing;
}

/* ---------- TRACK ---------- */
.vs-track {
    display: flex;
    height: var(--vs-track-h);
    border-bottom: 1px solid var(--vs-border);
    background: var(--vs-bg-dark);
}

.vs-track.armed {
    background: rgba(255, 68, 68, 0.05);
}

.vs-track.recording {
    background: rgba(255, 68, 68, 0.08);
}

.vs-track-reference {
    background: rgba(160, 100, 255, 0.05);
}

.vs-track-info {
    width: var(--vs-track-info-w);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 8px 10px;
    background: var(--vs-bg-panel);
    /* Keep track info fixed while waveforms scroll */
    position: sticky;
    left: 0;
    z-index: 10;
}

/* Track Header Row */
.vs-track-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.vs-track-icon {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    background: var(--vs-bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--vs-accent);
    font-size: 11px;
    flex-shrink: 0;
}

.vs-track-reference .vs-track-icon {
    color: #a78bfa;
}

.vs-track-name {
    flex: 1;
    font-size: 12px;
    font-weight: 600;
    color: var(--vs-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.vs-track-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

/* Track Controls Row */
.vs-track-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.vs-track-btns {
    display: flex;
    gap: 3px;
    flex-shrink: 0;
}

.vs-track-volume {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--vs-text-dim);
    font-size: 10px;
}

.vs-track-volume i {
    font-size: 10px;
    flex-shrink: 0;
}

.vs-vol-slider {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--vs-border);
    border-radius: 2px;
    cursor: pointer;
}

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

.vs-vol-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--vs-accent);
    cursor: pointer;
    border: none;
}

/* Track Input Row */
.vs-track-input {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--vs-text-dim);
    font-size: 10px;
}

.vs-track-input i {
    font-size: 10px;
    flex-shrink: 0;
}

.vs-track-input .vs-input-select {
    flex: 1;
    padding: 3px 6px;
    font-size: 10px;
    background: var(--vs-bg-dark);
    border: 1px solid var(--vs-border);
    border-radius: 3px;
    color: var(--vs-text-dim);
    min-width: 0;
}

.vs-track-input .vs-input-select:focus {
    outline: none;
    border-color: var(--vs-accent);
}

/* Legacy compatibility */
.vs-track-ctrls {
    display: flex;
    gap: 3px;
    flex-shrink: 0;
}

/* Track Control Buttons */
.vs-tc {
    width: 24px;
    height: 24px;
    border: 1px solid var(--vs-border);
    border-radius: 4px;
    background: var(--vs-bg-dark);
    color: var(--vs-text-dim);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.1s;
}

.vs-tc:hover {
    background: var(--vs-bg-hover);
    border-color: var(--vs-border-light);
}

.vs-tc.active {
    background: var(--vs-accent);
    border-color: var(--vs-accent);
    color: #000;
}

.vs-tc.arm-btn.active {
    background: var(--vs-rec);
    border-color: var(--vs-rec);
    color: #fff;
}

.vs-tc.mute-btn.active {
    background: #f59e0b;
    border-color: #f59e0b;
    color: #000;
}

.vs-tc.solo-btn.active {
    background: #3b82f6;
    border-color: #3b82f6;
    color: #fff;
}

.vs-tc.vs-track-btn-delete {
    color: #666;
}

.vs-tc.vs-track-btn-delete:hover {
    color: var(--vs-rec);
    border-color: var(--vs-rec);
}

/* Waveform Area */
.vs-track-waveform {
    flex: 1;
    position: relative;
    min-width: 0;
    overflow: visible;
    border-left: 2px solid #4a4a5a;
}

/* ---------- REGIONS ---------- */
.vs-region {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    height: calc(var(--vs-track-h) - 16px);
    background: rgba(0, 212, 170, 0.15);
    border: 1px solid rgba(0, 212, 170, 0.4);
    border-radius: 3px;
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.1s, box-shadow 0.1s;
}

.vs-region:hover {
    border-color: var(--vs-accent);
}

.vs-region.selected {
    border-color: var(--vs-accent);
    box-shadow: 0 0 0 1px var(--vs-accent);
}

.vs-region.recording {
    background: rgba(255, 68, 68, 0.15);
    border-color: var(--vs-rec);
    overflow: hidden;
}

/* Recording canvas should NOT stretch - it draws at exact pixel positions */
.vs-region.recording canvas {
    display: block;
    width: auto !important;
    height: 100%;
    opacity: 0.9;
}

/* Normal region canvas stretches to fill container */
.vs-region:not(.recording) canvas {
    display: block;
    width: 100%;
    height: 100%;
    opacity: 0.9;
}

.vs-track-reference .vs-region {
    background: rgba(167, 139, 250, 0.15);
    border-color: rgba(167, 139, 250, 0.4);
}

.vs-track-reference .vs-region:hover,
.vs-track-reference .vs-region.selected {
    border-color: #a78bfa;
}

/* ---------- TOOL CURSORS ---------- */
.vs-timeline.tool-select {
    cursor: default;
}

.vs-timeline.tool-split {
    cursor: crosshair;
}

/* ---------- WELCOME/LATENCY POPUP ---------- */
.vs-welcome-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.vs-welcome-popup {
    background: var(--vs-bg-panel);
    border: 1px solid var(--vs-border);
    border-radius: 12px;
    max-width: 480px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.vs-welcome-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--vs-border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.vs-welcome-header i {
    font-size: 24px;
    color: var(--vs-accent);
}

.vs-welcome-header h2 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--vs-text);
}

.vs-welcome-body {
    padding: 24px;
}

.vs-welcome-intro {
    color: var(--vs-text-dim);
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.vs-welcome-section {
    margin-bottom: 20px;
}

.vs-welcome-section h3 {
    font-size: 13px;
    font-weight: 600;
    color: var(--vs-text);
    margin: 0 0 12px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.vs-welcome-section h3 i {
    color: var(--vs-accent);
    font-size: 14px;
}

.vs-welcome-tips {
    background: var(--vs-bg-dark);
    border-radius: 8px;
    padding: 14px 16px;
}

.vs-welcome-tips ul {
    margin: 0;
    padding: 0 0 0 18px;
    color: var(--vs-text-dim);
    font-size: 12px;
    line-height: 1.8;
}

.vs-welcome-tips li {
    margin-bottom: 4px;
}

.vs-welcome-tips li:last-child {
    margin-bottom: 0;
}

.vs-latency-current {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--vs-bg-dark);
    border-radius: 8px;
    padding: 14px 16px;
    margin-bottom: 16px;
}

.vs-latency-current-label {
    color: var(--vs-text-dim);
    font-size: 12px;
}

.vs-latency-current-value {
    font-family: 'Fira Code', monospace;
    font-size: 16px;
    font-weight: 600;
    color: var(--vs-accent);
}

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

.vs-latency-actions button {
    flex: 1;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.15s;
}

.vs-btn-calibrate {
    background: var(--vs-accent);
    border: none;
    color: #000;
}

.vs-btn-calibrate:hover {
    background: var(--vs-accent-dim);
}

.vs-btn-calibrate:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.vs-btn-manual {
    background: transparent;
    border: 1px solid var(--vs-border);
    color: var(--vs-text-dim);
}

.vs-btn-manual:hover {
    border-color: var(--vs-accent);
    color: var(--vs-accent);
}

.vs-welcome-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--vs-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.vs-welcome-skip {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--vs-text-dim);
    font-size: 12px;
}

.vs-welcome-skip input {
    accent-color: var(--vs-accent);
}

.vs-btn-continue {
    padding: 10px 24px;
    background: var(--vs-bg-hover);
    border: 1px solid var(--vs-border);
    border-radius: 6px;
    color: var(--vs-text);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
}

.vs-btn-continue:hover {
    background: var(--vs-accent);
    border-color: var(--vs-accent);
    color: #000;
}

.vs-calibrating-status {
    text-align: center;
    padding: 20px;
    color: var(--vs-text-dim);
    font-size: 13px;
}

.vs-calibrating-status i {
    font-size: 32px;
    color: var(--vs-accent);
    margin-bottom: 12px;
    display: block;
}

.vs-calibrating-status .progress-text {
    margin-top: 8px;
    font-size: 12px;
    color: var(--vs-text-dim);
}

/* ---------- RESPONSIVE TABLET (1000px) ---------- */
@media (max-width: 1000px) {
    .vs-track-info,
    .vs-ruler-header,
    .vs-add-track-cell {
        width: 200px;
    }

    .vs-ruler-spacer {
        width: 200px;
    }

    .vs-hscroll {
        padding-left: 206px;
    }

    .vs-logo {
        display: none;
    }

    .vs-load-audio-btn span {
        display: none;
    }
}

/* ---------- RESPONSIVE TABLET SMALL (800px) ---------- */
@media (max-width: 800px) {
    :root {
        --vs-track-h: 80px;
        --vs-track-info-w: 160px;
    }

    .vs-track-info,
    .vs-ruler-header,
    .vs-add-track-cell {
        width: var(--vs-track-info-w);
    }

    .vs-ruler-spacer {
        width: var(--vs-track-info-w);
    }

    .vs-hscroll {
        padding-left: calc(var(--vs-track-info-w) + 6px);
    }

    .vs-latency-box,
    .vs-preroll-box,
    .vs-bpm-box span {
        display: none;
    }

    .vs-track-input {
        display: none;
    }

    .vs-topbar {
        padding: 0 8px;
        gap: 4px;
    }

    .vs-tb {
        width: 32px;
        height: 32px;
    }
}

/* ==============================================
   MOBILE VIEW (max-width: 600px)
   App-like design inspired by professional DAWs
   ============================================== */
@media (max-width: 600px) {
    :root {
        --vs-track-h: 76px;
        --vs-track-info-w: 90px;
        --vs-mobile-transport-h: 70px;
        --vs-mobile-header-h: 44px;
    }

    /* Page container - NOT fixed, flows naturally */
    .voice-stack-page {
        height: auto;
        min-height: calc(100vh - var(--header-height, 52px) - var(--mobile-nav-height, 52px));
        min-height: calc(100dvh - var(--header-height, 52px) - var(--mobile-nav-height, 52px));
        overflow: visible;
        position: relative;
    }

    .vs-container {
        height: calc(100vh - var(--header-height, 52px) - var(--mobile-nav-height, 52px) - var(--vs-mobile-transport-h));
        height: calc(100dvh - var(--header-height, 52px) - var(--mobile-nav-height, 52px) - var(--vs-mobile-transport-h));
        display: flex;
        flex-direction: column;
        overflow: hidden;
    }

    /* ===== MOBILE TOP BAR - HIDE completely ===== */
    .vs-topbar {
        display: none !important;
    }

    /* ===== TIMELINE AREA ===== */
    .vs-timeline-area {
        flex: 1;
        display: flex;
        flex-direction: column;
        min-height: 0;
        overflow: hidden;
    }

    /* ===== RULER BAR - MOBILE ===== */
    .vs-ruler-bar {
        height: 32px;
        background: var(--vs-bg-panel);
        flex-shrink: 0;
    }

    .vs-ruler-header {
        width: var(--vs-track-info-w);
        padding: 4px;
    }

    .vs-load-audio-btn {
        width: 100%;
        height: 100%;
        padding: 2px 6px;
        font-size: 12px;
        border-radius: 4px;
        justify-content: center;
    }

    .vs-load-audio-btn span {
        display: none;
    }

    .vs-load-audio-btn i {
        font-size: 14px;
    }

    .vs-time-ruler {
        border-left-width: 1px;
    }

    .vs-ruler-label {
        font-size: 8px;
    }

    /* ===== TRACKS - MOBILE ULTRA-CLEAN LAYOUT ===== */
    .vs-timeline {
        flex: 1;
        overflow-y: auto;
        overflow-x: hidden;
    }

    .vs-tracks {
        min-height: auto;
    }

    .vs-track {
        height: var(--vs-track-h);
        border-bottom: 1px solid var(--vs-border);
        display: flex;
    }

    /* Track info - NUMBER + VERTICAL BUTTONS layout (like reference image) */
    .vs-track-info {
        width: var(--vs-track-info-w);
        padding: 0;
        gap: 0;
        display: flex;
        flex-direction: row;
        justify-content: flex-start;
        align-items: stretch;
        background: var(--vs-bg-panel);
        flex-shrink: 0;
        overflow: hidden;
    }

    /* Mobile track header - BIG NUMBER */
    .vs-track-header {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        flex: 1;
        padding: 4px;
    }

    /* Hide the icon on mobile, show track number instead */
    .vs-track-icon {
        display: none !important;
    }

    /* Track number - BIG and prominent */
    .vs-track-number {
        font-size: 28px;
        font-weight: 700;
        color: var(--vs-accent);
        line-height: 1;
    }

    /* Reference track number - show music icon instead */
    .vs-track-number.vs-ref-number {
        font-size: 20px;
        color: #a78bfa;
    }

    /* HIDE track name on mobile */
    .vs-track-name {
        display: none !important;
    }

    /* HIDE track actions (delete, etc) on mobile - use context menu instead */
    .vs-track-actions {
        display: none !important;
    }

    /* Mobile track controls - VERTICAL on right side */
    .vs-track-controls {
        display: flex;
        flex-direction: column;
        gap: 0;
        align-items: center;
        justify-content: center;
        padding: 4px 6px;
        background: var(--vs-bg-dark);
        border-left: 1px solid var(--vs-border);
    }

    .vs-track-btns {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    /* S, M, R buttons - vertical stack, RECTANGULAR shape */
    .vs-tc {
        width: 32px;
        height: 18px;
        min-width: 32px;
        min-height: 18px;
        font-size: 10px;
        font-weight: 700;
        border-radius: 3px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        border: 1px solid var(--vs-border);
        outline: none;
        -webkit-tap-highlight-color: transparent;
    }

    .vs-tc:focus,
    .vs-tc:focus-visible {
        outline: none;
        box-shadow: none;
    }

    /* Hide volume and input on mobile */
    .vs-track-volume,
    .vs-track-input {
        display: none !important;
    }

    /* Waveform area */
    .vs-track-waveform {
        flex: 1;
        border-left: 1px solid var(--vs-border);
        min-width: 0;
    }

    /* Regions - touch friendly */
    .vs-region {
        height: calc(var(--vs-track-h) - 8px);
        border-radius: 3px;
    }

    /* ===== ADD TRACK ROW - MOBILE ===== */
    .vs-add-track-row {
        min-height: 48px;
        height: 48px;
        display: flex;
    }

    .vs-add-track-cell {
        width: var(--vs-track-info-w);
        padding: 6px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* Nueva Pista button - ONLY "+" icon, centered, circular */
    .vs-add-track-btn {
        width: 34px;
        height: 34px;
        padding: 0;
        border-radius: 50%;
        border: 2px dashed var(--vs-accent);
        background: transparent;
        font-size: 18px;
        color: var(--vs-accent);
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0;
    }

    .vs-add-track-btn:active {
        background: rgba(0, 212, 170, 0.15);
        transform: scale(0.95);
    }

    /* Hide text "Nueva Pista" on mobile - show only + */
    .vs-add-track-btn span,
    .vs-add-track-btn::after {
        display: none !important;
    }

    .vs-add-track-btn i {
        font-size: 16px;
    }

    .vs-add-track-space {
        flex: 1;
        border-left: 1px solid var(--vs-border);
    }

    /* ===== HORIZONTAL SCROLL - MOBILE ===== */
    .vs-hscroll {
        height: 6px;
        padding: 1px 4px;
        padding-left: calc(var(--vs-track-info-w) + 4px);
        flex-shrink: 0;
    }

    .vs-hscroll-track {
        height: 4px;
    }

    .vs-hscroll-thumb {
        height: 4px;
        min-width: 24px;
    }

    /* ===== MOBILE TRANSPORT BAR (BOTTOM) ===== */
    /* Position above the main app navigation */
    .vs-mobile-transport {
        position: fixed;
        bottom: var(--mobile-nav-height, 52px);
        left: 0;
        right: 0;
        height: var(--vs-mobile-transport-h);
        background: var(--vs-bg-panel);
        border-top: 1px solid var(--vs-border);
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 12px;
        z-index: 100;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
    }

    /* Left: Latency display */
    .vs-mobile-latency {
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 6px 10px;
        background: var(--vs-bg-dark);
        border-radius: 20px;
        color: var(--vs-text-dim);
        font-size: 11px;
        font-family: 'Fira Code', monospace;
        cursor: pointer;
        min-width: 60px;
        justify-content: center;
    }

    .vs-mobile-latency i {
        font-size: 10px;
        color: var(--vs-accent);
    }

    .vs-mobile-latency .vs-lat-unit {
        color: var(--vs-text-dim);
        opacity: 0.7;
    }

    /* Center: Transport buttons group */
    .vs-mobile-transport-center {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    /* Mobile transport buttons */
    .vs-mobile-transport .vs-mtb {
        width: 38px;
        height: 38px;
        border-radius: 50%;
        border: none;
        background: var(--vs-bg-hover);
        color: var(--vs-text);
        font-size: 13px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.15s ease;
        -webkit-tap-highlight-color: transparent;
        outline: none;
    }

    .vs-mobile-transport .vs-mtb:focus,
    .vs-mobile-transport .vs-mtb:focus-visible {
        outline: none;
        box-shadow: none;
    }

    .vs-mobile-transport .vs-mtb:active {
        transform: scale(0.92);
        opacity: 0.8;
    }

    .vs-mobile-transport .vs-mtb.active {
        background: var(--vs-accent);
        color: #000;
    }

    /* Record button - larger and prominent */
    .vs-mobile-transport .vs-mtb-record {
        width: 48px;
        height: 48px;
        background: var(--vs-rec);
        color: #fff;
        font-size: 16px;
        box-shadow: 0 2px 10px rgba(255, 68, 68, 0.3);
    }

    .vs-mobile-transport .vs-mtb-record:active {
        transform: scale(0.95);
    }

    .vs-mobile-transport .vs-mtb-record.recording {
        animation: mobile-pulse-rec 0.8s ease-in-out infinite;
    }

    @keyframes mobile-pulse-rec {
        0%, 100% {
            transform: scale(1);
            box-shadow: 0 2px 10px rgba(255, 68, 68, 0.3);
        }
        50% {
            transform: scale(1.05);
            box-shadow: 0 2px 15px rgba(255, 68, 68, 0.5);
        }
    }

    /* Right: Metronome button */
    .vs-mobile-metro {
        width: 38px;
        height: 38px;
        border-radius: 50%;
        border: none;
        background: var(--vs-bg-dark);
        color: var(--vs-text-dim);
        font-size: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.15s ease;
        -webkit-tap-highlight-color: transparent;
        outline: none;
    }

    .vs-mobile-metro:focus,
    .vs-mobile-metro:focus-visible {
        outline: none;
        box-shadow: none;
    }

    .vs-mobile-metro:active {
        transform: scale(0.92);
    }

    .vs-mobile-metro.active {
        background: var(--vs-accent);
        color: #000;
    }

    /* Playhead - larger touch target on mobile */
    .vs-playhead {
        width: 2px;
    }

    .vs-playhead::before {
        border-left-width: 6px;
        border-right-width: 6px;
        border-top-width: 10px;
        left: -6px;
    }

    /* Larger touch area for playhead dragging */
    .vs-playhead::after {
        content: '';
        position: absolute;
        top: 0;
        left: -15px;
        width: 30px;
        height: 100%;
        cursor: ew-resize;
    }

    .vs-playhead.dragging {
        background: #00ffcc;
    }

    .vs-playhead.dragging::before {
        border-top-color: #00ffcc;
    }

    /* Welcome popup - mobile optimized */
    .vs-welcome-popup {
        max-width: 95%;
        max-height: 80vh;
        margin: 10px;
        border-radius: 12px;
    }

    .vs-welcome-header {
        padding: 12px 16px;
    }

    .vs-welcome-header h2 {
        font-size: 14px;
    }

    .vs-welcome-body {
        padding: 12px 16px;
    }

    .vs-welcome-intro {
        font-size: 11px;
    }

    .vs-welcome-section h3 {
        font-size: 11px;
    }

    .vs-welcome-tips ul {
        font-size: 10px;
    }

    .vs-latency-actions {
        flex-direction: column;
        gap: 8px;
    }

    .vs-latency-actions button {
        padding: 12px;
        font-size: 12px;
    }

    .vs-welcome-footer {
        padding: 12px 16px;
        flex-direction: column;
        gap: 10px;
    }

    .vs-btn-continue {
        width: 100%;
        padding: 12px;
    }
}

/* ==============================================
   EXTRA SMALL MOBILE (max-width: 380px)
   ============================================== */
@media (max-width: 380px) {
    :root {
        --vs-track-h: 66px;
        --vs-track-info-w: 78px;
        --vs-mobile-transport-h: 58px;
    }

    .vs-track-number {
        font-size: 22px;
    }

    .vs-track-number.vs-ref-number {
        font-size: 15px;
    }

    .vs-tc {
        width: 28px;
        height: 16px;
        min-width: 28px;
        min-height: 16px;
        font-size: 9px;
    }

    .vs-track-controls {
        padding: 3px 5px;
        gap: 0;
    }

    .vs-track-btns {
        gap: 3px;
    }

    /* Transport bar - smaller */
    .vs-mobile-transport {
        padding: 0 8px;
    }

    .vs-mobile-latency {
        padding: 4px 8px;
        font-size: 10px;
        min-width: 50px;
    }

    .vs-mobile-transport-center {
        gap: 6px;
    }

    .vs-mobile-transport .vs-mtb {
        width: 32px;
        height: 32px;
        font-size: 11px;
    }

    .vs-mobile-transport .vs-mtb-record {
        width: 42px;
        height: 42px;
        font-size: 14px;
    }

    .vs-mobile-metro {
        width: 32px;
        height: 32px;
        font-size: 12px;
    }

    .vs-add-track-btn {
        width: 28px;
        height: 28px;
    }

    .vs-add-track-btn i {
        font-size: 14px;
    }
}

/* ==============================================
   LANDSCAPE MOBILE
   ============================================== */
@media (max-width: 900px) and (max-height: 500px) and (orientation: landscape) {
    :root {
        --vs-track-h: 54px;
        --vs-track-info-w: 70px;
        --vs-mobile-transport-h: 48px;
    }

    .vs-topbar {
        display: none !important;
    }

    .vs-container {
        height: calc(100vh - var(--vs-mobile-transport-h));
        height: calc(100dvh - var(--vs-mobile-transport-h));
    }

    .vs-mobile-transport {
        bottom: 0;
        height: var(--vs-mobile-transport-h);
        padding: 0 12px;
    }

    .vs-mobile-latency {
        padding: 4px 8px;
        font-size: 9px;
        min-width: 48px;
    }

    .vs-mobile-transport-center {
        gap: 8px;
    }

    .vs-mobile-transport .vs-mtb {
        width: 30px;
        height: 30px;
        font-size: 11px;
    }

    .vs-mobile-transport .vs-mtb-record {
        width: 38px;
        height: 38px;
        font-size: 13px;
    }

    .vs-mobile-metro {
        width: 30px;
        height: 30px;
        font-size: 11px;
    }

    .vs-track-number {
        font-size: 18px;
    }

    .vs-track-number.vs-ref-number {
        font-size: 12px;
    }

    .vs-ruler-bar {
        height: 20px;
    }

    .vs-tc {
        width: 26px;
        height: 14px;
        min-width: 26px;
        min-height: 14px;
        font-size: 8px;
    }

    .vs-track-controls {
        padding: 2px 4px;
        gap: 0;
    }

    .vs-track-btns {
        gap: 2px;
    }
}

/* ==============================================
   TABLET PORTRAIT (600px - 900px)
   ============================================== */
@media (min-width: 601px) and (max-width: 900px) {
    :root {
        --vs-track-h: 85px;
        --vs-track-info-w: 140px;
    }

    .vs-topbar {
        padding: 0 12px;
    }

    /* Hide some controls */
    .vs-logo,
    .vs-preroll-box,
    .vs-latency-box {
        display: none;
    }

    .vs-track-info {
        width: var(--vs-track-info-w);
        padding: 8px;
        gap: 4px;
    }

    .vs-track-header {
        gap: 6px;
    }

    .vs-track-icon {
        width: 26px;
        height: 26px;
    }

    .vs-track-name {
        font-size: 11px;
    }

    .vs-track-actions {
        gap: 2px;
    }

    .vs-tc {
        width: 22px;
        height: 22px;
        font-size: 9px;
    }

    .vs-track-controls {
        gap: 6px;
    }

    .vs-track-volume {
        display: flex;
    }

    .vs-track-volume i {
        font-size: 9px;
    }

    .vs-track-input {
        display: none;
    }

    .vs-ruler-header,
    .vs-add-track-cell {
        width: var(--vs-track-info-w);
    }

    .vs-hscroll {
        padding-left: calc(var(--vs-track-info-w) + 6px);
    }

    .vs-add-track-btn {
        font-size: 10px;
        padding: 6px 10px;
    }
}

/* ==============================================
   TOUCH DEVICE ENHANCEMENTS
   ============================================== */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets - only for topbar buttons */
    .vs-tb {
        min-width: 40px;
        min-height: 40px;
    }

    /* Track buttons are handled by mobile breakpoints */

    /* Remove hover effects that don't work on touch */
    .vs-tb:hover,
    .vs-tc:hover,
    .vs-add-track-btn:hover,
    .vs-load-audio-btn:hover:not(.disabled) {
        background: inherit;
        color: inherit;
        border-color: inherit;
    }

    .vs-tb.active:hover {
        background: var(--vs-accent);
        color: #000;
    }

    /* Active states for touch feedback */
    .vs-tb:active,
    .vs-tc:active {
        opacity: 0.7;
        transform: scale(0.95);
    }

    /* Scrollbar always visible on touch */
    .vs-hscroll {
        opacity: 1;
    }

    /* Prevent text selection during touch interactions */
    .vs-track,
    .vs-topbar,
    .vs-mobile-transport {
        -webkit-user-select: none;
        user-select: none;
    }
}

/* ==============================================
   MOBILE TRACK CONTEXT MENU
   ============================================== */
.vs-mobile-track-menu {
    position: fixed;
    bottom: var(--mobile-nav-height, 52px);
    left: 0;
    right: 0;
    background: var(--vs-bg-panel);
    border-top: 1px solid var(--vs-border);
    border-radius: 16px 16px 0 0;
    padding: 8px 0 8px 0;
    z-index: 300;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.4);
}

.vs-mobile-track-menu.open {
    transform: translateY(0);
}

.vs-mobile-track-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-bottom: 1px solid var(--vs-border);
}

.vs-mobile-track-menu-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--vs-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.vs-mobile-track-menu-title i {
    color: var(--vs-accent);
}

.vs-mobile-track-menu-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--vs-bg-dark);
    color: var(--vs-text-dim);
    font-size: 16px;
    cursor: pointer;
}

.vs-mobile-track-menu-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    padding: 16px 12px;
}

.vs-mobile-menu-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 8px;
    border: none;
    border-radius: 12px;
    background: var(--vs-bg-dark);
    color: var(--vs-text-dim);
    font-size: 10px;
    cursor: pointer;
    transition: all 0.15s;
}

.vs-mobile-menu-btn i {
    font-size: 20px;
}

.vs-mobile-menu-btn:active {
    transform: scale(0.95);
    opacity: 0.8;
}

.vs-mobile-menu-btn.active {
    background: var(--vs-accent);
    color: #000;
}

.vs-mobile-menu-btn.btn-arm.active {
    background: var(--vs-rec);
    color: #fff;
}

.vs-mobile-menu-btn.btn-mute.active {
    background: #f59e0b;
    color: #000;
}

.vs-mobile-menu-btn.btn-solo.active {
    background: #3b82f6;
    color: #fff;
}

.vs-mobile-menu-btn.btn-delete {
    color: var(--vs-rec);
}

.vs-mobile-menu-btn.btn-delete:active {
    background: var(--vs-rec);
    color: #fff;
}

/* Mobile track menu overlay */
.vs-mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 250;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.vs-mobile-menu-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

/* ==============================================
   MOBILE SWIPE ACTIONS
   ============================================== */
.vs-track-swipe-container {
    position: relative;
    overflow: hidden;
}

.vs-track-swipe-actions {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    padding-right: 12px;
    background: linear-gradient(90deg, transparent 0%, var(--vs-rec) 20%);
    transform: translateX(100%);
    transition: transform 0.2s ease;
}

.vs-track-swipe-actions.visible {
    transform: translateX(0);
}

.vs-swipe-delete-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: #fff;
    color: var(--vs-rec);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* ==============================================
   MOBILE VOLUME SLIDER (appears on tap)
   ============================================== */
.vs-mobile-volume-popup {
    position: fixed;
    left: 50%;
    bottom: calc(var(--mobile-nav-height, 52px) + var(--vs-mobile-transport-h, 70px) + 16px);
    transform: translateX(-50%);
    background: var(--vs-bg-panel);
    border: 1px solid var(--vs-border);
    border-radius: 24px;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 280;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s, transform 0.2s;
}

.vs-mobile-volume-popup.open {
    opacity: 1;
    pointer-events: auto;
}

.vs-mobile-volume-popup i {
    color: var(--vs-accent);
    font-size: 16px;
}

.vs-mobile-volume-popup input[type="range"] {
    width: 150px;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--vs-border);
    border-radius: 3px;
}

.vs-mobile-volume-popup input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--vs-accent);
}

.vs-mobile-volume-popup .volume-value {
    font-size: 12px;
    color: var(--vs-text);
    font-family: 'Fira Code', monospace;
    min-width: 36px;
    text-align: right;
}

/* ==============================================
   MOBILE POPUPS (Metronome & Latency)
   ============================================== */
.vs-mobile-popup {
    position: fixed;
    left: 50%;
    bottom: calc(var(--mobile-nav-height, 52px) + var(--vs-mobile-transport-h, 70px) + 16px);
    transform: translateX(-50%) translateY(20px);
    background: var(--vs-bg-panel);
    border: 1px solid var(--vs-border);
    border-radius: 16px;
    width: 90%;
    max-width: 320px;
    z-index: 350;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.vs-mobile-popup.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.vs-mobile-popup-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--vs-border);
}

.vs-mobile-popup-header span {
    font-size: 14px;
    font-weight: 600;
    color: var(--vs-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.vs-mobile-popup-header i {
    color: var(--vs-accent);
}

.vs-mobile-popup-close {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: var(--vs-bg-dark);
    color: var(--vs-text-dim);
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vs-mobile-popup-content {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.vs-mobile-popup-info {
    background: var(--vs-bg-dark);
    border-radius: 8px;
    padding: 10px 12px;
}

.vs-mobile-popup-info p {
    margin: 0;
    font-size: 11px;
    color: var(--vs-text-dim);
    line-height: 1.5;
}

.vs-mobile-popup-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.vs-mobile-popup-row label {
    font-size: 13px;
    color: var(--vs-text);
    flex-shrink: 0;
}

.vs-mobile-input-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.vs-mobile-btn-sm {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--vs-border);
    background: var(--vs-bg-dark);
    color: var(--vs-text);
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vs-mobile-btn-sm:active {
    background: var(--vs-bg-hover);
}

.vs-mobile-input-group input[type="number"] {
    width: 60px;
    padding: 8px;
    background: var(--vs-bg-dark);
    border: 1px solid var(--vs-border);
    border-radius: 8px;
    color: var(--vs-text);
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    -moz-appearance: textfield;
    appearance: textfield;
}

.vs-mobile-input-group input[type="number"]::-webkit-outer-spin-button,
.vs-mobile-input-group input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    appearance: none;
}

.vs-unit {
    font-size: 11px;
    color: var(--vs-text-dim);
    min-width: 28px;
}

.vs-mobile-slider {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--vs-border);
    border-radius: 3px;
}

.vs-mobile-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--vs-accent);
    cursor: pointer;
}

.vs-mobile-btn-action {
    width: 100%;
    padding: 14px;
    background: var(--vs-accent);
    border: none;
    border-radius: 10px;
    color: #000;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 4px;
}

.vs-mobile-btn-action:active {
    opacity: 0.85;
}

.vs-latency-display {
    background: var(--vs-bg-dark);
    border-radius: 8px;
    padding: 12px;
}

.vs-latency-value {
    font-family: 'Fira Code', monospace;
    font-size: 18px;
    font-weight: 600;
    color: var(--vs-accent);
}

/* Toggle Switch */
.vs-toggle {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
}

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

.vs-toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--vs-border);
    border-radius: 13px;
    transition: 0.3s;
}

.vs-toggle-slider::before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: 0.3s;
}

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

.vs-toggle input:checked + .vs-toggle-slider::before {
    transform: translateX(22px);
}

/* Mobile Popup Overlay */
.vs-mobile-popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 300;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s;
}

.vs-mobile-popup-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

/* ==============================================
   HIDE MOBILE ELEMENTS ON DESKTOP
   ============================================== */
@media (min-width: 601px) {
    .vs-mobile-transport {
        display: none !important;
    }

    .vs-mobile-track-menu,
    .vs-mobile-menu-overlay,
    .vs-mobile-volume-popup,
    .vs-mobile-popup,
    .vs-mobile-popup-overlay {
        display: none !important;
    }

    /* Hide track number on desktop - show icon instead */
    .vs-track-number {
        display: none !important;
    }
}