/* ===========================================
   StemScribe - Responsive Overrides
   Breakpoints:
     768px — Tablet / iPad
     480px — Small phone
     375px — iPhone SE / narrow
   =========================================== */

/* Mobile menu button: hidden by default */
.mobile-menu-btn {
    display: none;
    background: none;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 6px;
    color: var(--text);
    font-size: 1.4rem;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
    line-height: 1;
}

.mobile-menu-btn:hover {
    border-color: var(--psych-orange);
    color: var(--psych-orange);
}

/* ── Tablet: 768px ── */
@media (max-width: 768px) {

    /* Header */
    .header {
        padding: 0.75rem 1rem;
    }

    .logo-symbol {
        font-size: 1.5rem;
    }

    .logo-text {
        font-size: 1.3rem;
    }

    .nav-links {
        gap: 0.75rem;
    }

    .nav-links a {
        font-size: 0.8rem;
    }

    .library-btn, .settings-btn {
        font-size: 0.75rem;
        padding: 0.35rem 0.6rem;
    }

    /* Hero */
    .hero {
        margin-bottom: 2rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero-label {
        font-size: 0.65rem;
        letter-spacing: 2px;
        padding: 0.4rem 1rem;
    }

    /* Container */
    .container {
        padding: 2rem 1rem;
    }

    /* Upload */
    .upload-section {
        padding: 1.5rem;
        border-radius: 16px;
    }

    .drop-zone {
        padding: 2.5rem 1.5rem;
    }

    .drop-icon {
        font-size: 3rem;
    }

    .drop-title {
        font-size: 1.1rem;
    }

    .mode-btn {
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
    }

    .url-input {
        padding: 1rem;
        font-size: 0.9rem;
    }

    .archive-search {
        padding: 1rem;
        font-size: 0.9rem;
    }

    .submit-btn {
        font-size: 1rem;
        padding: 1rem 2rem;
    }

    /* Mixer: 3 columns at tablet */
    .stems-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Neve console: reduce side margins */
    .neve-console {
        margin: 0 10px;
    }

    .neve-console::before { left: -14px; width: 12px; }
    .neve-console::after { right: -14px; width: 12px; }

    /* Transport: wrap controls */
    .transport-controls {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .play-btn {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }

    .skip-btn {
        width: 40px;
        height: 40px;
    }

    .volume-slider {
        width: 80px;
    }

    /* Master transport */
    .master-transport {
        padding: 1rem 1.25rem;
        border-radius: 14px;
    }

    /* Song card */
    .song-card {
        padding: 1rem;
        gap: 1rem;
        border-radius: 12px;
    }

    .song-thumb {
        width: 60px;
        height: 60px;
    }

    /* Track info panel */
    .track-info-panel {
        border-radius: 12px;
    }

    .info-content {
        padding: 1rem;
    }

    /* Settings/Library panels */
    .settings-panel {
        width: 320px;
        right: -340px;
    }

    .library-panel {
        width: 320px;
    }

    /* Practice CTA */
    .practice-cta {
        padding: 1.5rem;
        margin-top: 2rem;
    }

    .practice-btn {
        font-size: 0.95rem;
        padding: 0.85rem 1.75rem;
    }

    /* Footer */
    .footer {
        padding: 2rem 1rem;
    }

    .footer-links {
        gap: 1rem;
    }
}

/* ── Small phone: 480px ── */
@media (max-width: 480px) {

    /* Header: collapsible mobile nav */
    .header {
        padding: 0.5rem 0.75rem;
        flex-wrap: wrap;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0.5rem;
        padding-top: 0.75rem;
        border-top: 1px solid rgba(255,255,255,0.08);
        margin-top: 0.5rem;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        font-size: 0.85rem;
        padding: 0.4rem 0;
    }

    .nav-links button {
        width: 100%;
        text-align: left;
        justify-content: flex-start;
    }

    .logo-symbol {
        font-size: 1.2rem;
    }

    .logo-text {
        font-size: 1.1rem;
    }

    .logo {
        gap: 0.5rem;
    }

    /* Hero */
    .hero {
        margin-bottom: 1.5rem;
    }

    .hero h1 {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }

    .hero p {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    .hero-label {
        font-size: 0.6rem;
        letter-spacing: 1.5px;
        padding: 0.3rem 0.75rem;
        margin-bottom: 1rem;
    }

    /* Container */
    .container {
        padding: 1.25rem 0.75rem;
    }

    /* Upload */
    .upload-section {
        padding: 1rem;
        border-radius: 12px;
        margin-bottom: 1.5rem;
    }

    .mode-toggle {
        margin-bottom: 1rem;
    }

    .mode-btn {
        padding: 0.5rem 0.6rem;
        font-size: 0.75rem;
        gap: 0.25rem;
    }

    .drop-zone {
        padding: 2rem 1rem;
        border-radius: 12px;
    }

    .drop-icon {
        font-size: 2.5rem;
        margin-bottom: 0.5rem;
    }

    .drop-title {
        font-size: 1rem;
    }

    .drop-subtitle {
        font-size: 0.75rem;
    }

    .url-input {
        padding: 0.85rem;
        font-size: 0.85rem;
        border-radius: 10px;
    }

    .platforms {
        gap: 0.4rem;
        margin-top: 0.75rem;
    }

    .platform-pill {
        font-size: 0.65rem;
        padding: 0.35rem 0.6rem;
    }

    .archive-search {
        padding: 0.85rem;
        font-size: 0.85rem;
    }

    .archive-filters {
        gap: 0.35rem;
    }

    .archive-filter {
        font-size: 0.7rem;
        padding: 0.3rem 0.5rem;
    }

    .submit-btn {
        font-size: 0.9rem;
        padding: 0.85rem 1.5rem;
        margin-top: 1.25rem;
        width: 100%;
    }

    /* Mixer: 2 columns */
    .stems-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Neve console: minimal margins */
    .neve-console {
        margin: 0 4px;
        padding: 0.75rem;
        padding-bottom: 2rem;
        border-width: 2px;
    }

    .neve-console::before,
    .neve-console::after {
        display: none;
    }

    .neve-armrest {
        left: -6px;
        right: -6px;
        height: 36px;
        bottom: -20px;
    }

    .neve-screw {
        width: 7px;
        height: 7px;
    }

    /* Stem card: compact layout */
    .stem-card {
        padding: 0.5rem 0.35rem 0.75rem;
        min-height: 380px;
    }

    .stem-icon {
        font-size: 1.1rem;
    }

    .stem-name {
        font-size: 0.55rem;
        letter-spacing: 1px;
        margin-bottom: 0.35rem;
    }

    /* Per-stem waveform: slightly shorter */
    .stem-waveform {
        height: 30px;
        margin-bottom: 0.35rem;
    }

    /* VU meter: compact */
    .vu-meter {
        height: 65px;
        margin-bottom: 0.5rem;
    }

    .vu-needle {
        height: 40px;
    }

    /* Mixer controls */
    .mute-btn, .solo-btn {
        width: 24px;
        height: 24px;
        font-size: 0.55rem;
    }

    .stem-mixer-controls {
        gap: 0.3rem;
        margin-bottom: 0.5rem;
    }

    /* Fader: shorter */
    .fader-track {
        height: 90px;
    }

    .led-meter {
        height: 90px;
        width: 12px;
    }

    .fader-cap {
        width: 28px;
        height: 20px;
    }

    /* Stem actions: compact */
    .stem-actions {
        gap: 0.25rem;
        margin-top: 0.35rem;
    }

    .stem-btn {
        font-size: 0.55rem;
        padding: 0.3rem 0.35rem;
    }

    /* Transport: stacked layout for touch */
    .master-transport {
        padding: 0.75rem;
        border-radius: 12px;
        margin-bottom: 1rem;
    }

    .transport-controls {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .play-btn {
        width: 48px;
        height: 48px;
        font-size: 1.2rem;
    }

    .skip-btn {
        width: 38px;
        height: 38px;
        font-size: 0.95rem;
    }

    .timeline-container {
        width: 100%;
        order: 10;
    }

    .timeline {
        height: 12px;
        padding: 10px 0;
    }

    .timeline-handle {
        width: 22px;
        height: 22px;
    }

    .time-display {
        font-size: 0.75rem;
    }

    .speed-control .speed-btn {
        padding: 5px 10px;
        font-size: 0.7rem;
    }

    .loop-control .loop-btn {
        padding: 5px 10px;
        font-size: 0.65rem;
    }

    .master-volume {
        gap: 0.4rem;
    }

    .master-volume span {
        font-size: 1rem;
    }

    .volume-slider {
        width: 60px;
    }

    /* Master waveform */
    .master-waveform-container {
        padding: 8px 10px;
        border-radius: 8px;
        margin-bottom: 0.75rem;
    }

    /* Song card: vertical stack */
    .song-card {
        flex-direction: column;
        text-align: center;
        padding: 1rem;
        gap: 0.75rem;
        border-radius: 10px;
        margin-bottom: 1rem;
    }

    .song-thumb {
        width: 64px;
        height: 64px;
    }

    .song-details h3 {
        font-size: 0.95rem;
    }

    .song-details p {
        font-size: 0.8rem;
    }

    .info-toggle-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    /* Results header */
    .results-header h2 {
        font-size: 1.4rem;
    }

    .results-header {
        margin-bottom: 1.5rem;
    }

    /* Track info panel */
    .track-info-panel {
        border-radius: 10px;
        margin-bottom: 1rem;
    }

    .info-header {
        padding: 0.75rem 1rem;
    }

    .info-content {
        padding: 0.75rem;
    }

    .info-section h4 {
        font-size: 0.75rem;
    }

    .info-section p {
        font-size: 0.85rem;
        line-height: 1.5;
    }

    /* Settings/Library: full width */
    .settings-panel {
        width: 100%;
        right: -100%;
    }

    .library-panel {
        width: 100%;
        right: -100%;
    }

    /* Practice CTA */
    .practice-cta {
        padding: 1rem;
        margin-top: 1.5rem;
        border-radius: 12px;
    }

    .practice-btn {
        font-size: 0.85rem;
        padding: 0.75rem 1.5rem;
        width: 100%;
    }

    /* Footer */
    .footer {
        padding: 1.5rem 0.75rem;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 0.75rem;
        justify-content: center;
    }

    .footer p {
        font-size: 0.75rem;
    }

    /* Processing section */
    .vinyl-spinner {
        transform: scale(0.8);
    }

    .stage-text {
        font-size: 0.9rem;
    }

    .stage-subtitle {
        font-size: 0.8rem;
    }
}

/* ── iPhone SE narrow: 375px ── */
@media (max-width: 375px) {

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 0.8rem;
    }

    .container {
        padding: 1rem 0.5rem;
    }

    .upload-section {
        padding: 0.75rem;
    }

    .mode-btn {
        padding: 0.4rem 0.5rem;
        font-size: 0.7rem;
    }

    .drop-zone {
        padding: 1.5rem 0.75rem;
    }

    .drop-title {
        font-size: 0.9rem;
    }

    /* Mixer: single column */
    .stems-grid {
        grid-template-columns: 1fr;
    }

    .stem-card {
        min-height: auto;
        padding: 0.5rem 0.75rem 0.75rem;
        display: grid;
        grid-template-columns: auto 1fr auto;
        grid-template-rows: auto auto;
        gap: 0.25rem 0.5rem;
        text-align: left;
    }

    .stem-card .stem-icon {
        grid-row: 1 / 3;
        grid-column: 1;
        align-self: center;
        font-size: 1.5rem;
    }

    .stem-card .stem-name {
        grid-row: 1;
        grid-column: 2;
        align-self: center;
        margin-bottom: 0;
    }

    .stem-card .stem-waveform {
        grid-row: 2;
        grid-column: 2;
        width: 100%;
        height: 28px;
        margin: 0;
    }

    .stem-card .vu-meter {
        display: none;
    }

    .stem-card .stem-mixer-controls {
        grid-row: 1;
        grid-column: 3;
        margin-bottom: 0;
    }

    .stem-card .fader-section {
        grid-row: 2;
        grid-column: 3;
        flex-direction: row;
        align-items: center;
    }

    .stem-card .fader-section .led-meter {
        display: none;
    }

    .stem-card .fader-section .fader-track {
        height: 28px;
        width: 80px;
        transform: none;
    }

    .stem-card .fader-section .fader-groove {
        top: 50%;
        left: 8px;
        right: 8px;
        bottom: auto;
        width: auto;
        height: 4px;
        transform: translateY(-50%);
    }

    .stem-card .fader-section .fader-cap {
        top: 50% !important;
        transform: translate(-50%, -50%);
        width: 20px;
        height: 28px;
    }

    .stem-card .stem-actions {
        grid-column: 1 / -1;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        margin-top: 0.25rem;
    }

    .stem-card .stem-actions .stem-btn {
        flex: 1;
        min-width: 60px;
        text-align: center;
    }

    .stem-card .cascade-badge {
        top: 2px;
        right: 2px;
        width: 14px;
        height: 14px;
        font-size: 0.55rem;
    }

    /* Transport: fully stacked */
    .transport-controls {
        justify-content: center;
    }

    .play-btn {
        width: 44px;
        height: 44px;
    }

    .skip-btn {
        width: 34px;
        height: 34px;
        font-size: 0.85rem;
    }

    .volume-slider {
        width: 50px;
    }

    .master-transport {
        padding: 0.5rem;
    }

    .song-card {
        padding: 0.75rem;
    }

    .song-thumb {
        width: 48px;
        height: 48px;
        border-radius: 8px;
    }

    /* Neve console: no decorative elements on tiny screens */
    .neve-console {
        margin: 0;
        padding: 0.5rem;
        padding-bottom: 1.5rem;
        border-radius: 8px;
        border-width: 2px;
    }

    .neve-armrest {
        height: 28px;
        bottom: -16px;
        left: -2px;
        right: -2px;
        border-radius: 6px 6px 10px 10px;
    }

    .neve-armrest-end {
        display: none;
    }

    .submit-btn {
        font-size: 0.85rem;
        padding: 0.75rem 1rem;
    }
}

/* ── Touch-friendly: coarse pointer devices ── */
@media (pointer: coarse) {
    .timeline {
        min-height: 16px;
        padding: 12px 0;
    }

    .timeline-handle {
        width: 24px;
        height: 24px;
    }

    .mute-btn, .solo-btn {
        min-width: 28px;
        min-height: 28px;
    }

    .stem-btn {
        min-height: 32px;
    }

    .play-btn {
        min-width: 44px;
        min-height: 44px;
    }

    .skip-btn {
        min-width: 40px;
        min-height: 40px;
    }

    .speed-btn, .loop-btn, .loop-clear-btn {
        min-height: 32px;
        min-width: 32px;
    }
}