:root {
    --bg-primary: #f5f5f7;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e5e5ea;
    --bg-card: #ffffff;
    --bg-track: #f8fafc;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.16);

    --label-primary: #1d1d1f;
    --label-secondary: #6e6e73;
    --label-tertiary: #86868b;

    --accent-orange: #ff9500;
    --accent-green: #34c759;
    --accent-blue: #007aff;
    --accent-red: #ff3b30;
    --accent-purple: #af52de;
    --accent-indigo: #5856d6;

    --ch1-color: #ff9500;
    --ch2-color: #ff2d55;
    --ch3-color: #af52de;
    --ch4-color: #5856d6;
    --ch5-color: #007aff;
    --ch6-color: #34c759;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
}

[data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --bg-card: #1c1c1e;
    --bg-track: #151516;
    --border-color: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.2);

    --label-primary: #f5f5f7;
    --label-secondary: #a1a1a6;
    --label-tertiary: #636366;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: system-ui, -system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-primary);
    color: var(--label-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    font-size: 13px;
}

.app-top-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
[data-theme="dark"] .app-top-header { background-color: rgba(28, 28, 30, 0.85); }

.brand-identity {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--label-primary);
}

.brand-icon-box {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent-orange), #e05300);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    box-shadow: 0 2px 8px rgba(255, 149, 0, 0.35);
}

.brand-text-block h1 {
    font-size: 14.5px;
    font-weight: 700;
    letter-spacing: -0.2px;
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
}
.brand-text-block p { font-size: 11px; color: var(--label-secondary); margin: 0; }

.brand-tag {
    font-size: 9px;
    font-weight: 800;
    background: rgba(255, 149, 0, 0.15);
    color: var(--accent-orange);
    padding: 2px 6px;
    border-radius: 4px;
}

.top-actions-group { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.btn-studio {
    height: 36px;
    min-height: 36px;
    padding: 0 14px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.15s ease-out;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
}
.btn-studio:active { transform: scale(0.97); }
.btn-studio.primary { background-color: var(--accent-green); color: #ffffff; }
.btn-studio.primary:hover { background-color: #2eb04d; }
.btn-studio.accent {
    background: linear-gradient(135deg, var(--accent-orange), #e05300);
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(255, 149, 0, 0.25);
}
.btn-studio.accent:hover { box-shadow: 0 4px 12px rgba(255, 149, 0, 0.4); }
.btn-studio.secondary {
    background-color: var(--bg-secondary);
    color: var(--label-primary);
    border: 1px solid var(--border-color);
}
.btn-studio.secondary:hover { background-color: var(--bg-tertiary); border-color: var(--border-strong); }

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    background: transparent;
    color: var(--label-secondary);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}
.btn-icon:hover { background-color: var(--bg-tertiary); color: var(--label-primary); }

.input-studio, .select-studio {
    height: 36px;
    background-color: var(--bg-secondary);
    color: var(--label-primary);
    border: 1px solid var(--border-color);
    padding: 0 10px;
    border-radius: var(--radius-sm);
    outline: none;
    font-size: 12px;
    font-weight: 500;
}
.input-studio:focus, .select-studio:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.main-content-flow {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 20px 60px 20px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.sd-hub-banner {
    background: linear-gradient(135deg, rgba(255, 149, 0, 0.08), rgba(255, 59, 48, 0.04));
    border: 1.5px solid rgba(255, 149, 0, 0.25);
    border-radius: var(--radius-xl);
    padding: 24px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}
.sd-hub-text h2 {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--label-primary);
    margin-bottom: 6px;
}
.sd-hub-text p {
    font-size: 13px;
    color: var(--label-secondary);
    max-width: 620px;
    line-height: 1.45;
}
.sd-hub-actions { display: flex; flex-direction: column; gap: 8px; flex-shrink: 0; }

.catalog-section-container {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}
.catalog-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.catalog-title-group h3 {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: var(--label-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.catalog-title-group p { font-size: 12px; color: var(--label-secondary); }

.genre-filter-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    overflow-x: auto;
    padding: 4px 0;
    scrollbar-width: none;
}
.genre-filter-bar::-webkit-scrollbar { display: none; }
.genre-filter-pill {
    height: 34px;
    min-height: 34px;
    padding: 0 14px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--label-secondary);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.genre-filter-pill:hover { color: var(--label-primary); border-color: var(--border-strong); }
.genre-filter-pill.active {
    background: var(--label-primary);
    color: var(--bg-secondary);
    border-color: var(--label-primary);
}

.catalog-toolbar-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    background-color: var(--bg-primary);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}
.search-input-box {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 220px;
    max-width: 380px;
}
.search-input-box input { width: 100%; }
.selection-actions-box { display: flex; align-items: center; gap: 8px; }

.songs-grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 12px;
    margin-top: 4px;
}
.song-card-item {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: all 0.2s ease-out;
    position: relative;
}
.song-card-item:hover {
    border-color: var(--accent-orange);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
}
.song-card-item.is-playing {
    border-color: var(--accent-red);
    background-color: rgba(255, 59, 48, 0.03);
}

.song-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}
.song-card-info {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow: hidden;
}
.song-genre-tag {
    font-size: 9.5px;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 4px;
    background-color: var(--bg-secondary);
    color: var(--accent-orange);
    border: 1px solid var(--border-color);
    letter-spacing: 0.5px;
}
.song-card-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--label-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.song-card-desc {
    font-size: 11px;
    color: var(--label-secondary);
    line-height: 1.35;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.song-card-meta {
    font-size: 10px;
    color: var(--label-tertiary);
    font-family: ui-monospace, Menlo, Monaco, monospace;
}
.song-card-buttons {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 2px;
}

.btn-card-action {
    height: 32px;
    min-height: 32px;
    padding: 0 10px;
    font-size: 11.5px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--label-primary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: all 0.15s;
    white-space: nowrap;
}
.btn-card-action:hover { background-color: var(--bg-tertiary); }
.btn-card-action:active { transform: scale(0.96); }

.btn-card-preview {
    background: var(--accent-orange);
    color: #ffffff;
    border-color: var(--accent-orange);
}
.btn-card-preview:hover { background: #e05300; }
.btn-card-preview.is-previewing {
    background: var(--accent-red);
    border-color: var(--accent-red);
}
.btn-card-edit { color: var(--accent-blue); }

.daw-editor-section {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
    scroll-margin-top: 70px;
}
.daw-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 14px;
    gap: 16px;
    flex-wrap: wrap;
}
.daw-title-block h3 {
    font-size: 18px;
    font-weight: 800;
    color: var(--label-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.daw-title-block p { font-size: 12px; color: var(--label-secondary); }

.daw-controls-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    background-color: var(--bg-primary);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}
.transport-lcd {
    background: #1c1c1e;
    color: #34c759;
    border-radius: var(--radius-sm);
    padding: 5px 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: ui-monospace, Menlo, Monaco, monospace;
    font-size: 12.5px;
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.segmented-control {
    display: inline-flex;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 2px;
    gap: 2px;
}
.seg-item {
    padding: 4px 8px;
    font-size: 11px;
    font-weight: 600;
    color: var(--label-secondary);
    border-radius: 4px;
    cursor: pointer;
}
.seg-item.active { background-color: var(--accent-orange); color: #ffffff; }

.timeline-wrapper {
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-x: auto;
    overflow-y: hidden;
    position: relative;
    padding-bottom: 8px;
}
.timeline-scroll-area { position: relative; padding: 10px 20px 16px 0; min-width: 100%; }
.timeline-ruler {
    height: 26px;
    margin-left: 120px;
    position: relative;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}
.ruler-mark {
    position: absolute;
    font-size: 10px;
    color: var(--label-tertiary);
    border-left: 1px solid var(--border-color);
    height: 10px;
    padding-left: 4px;
    bottom: 0;
    pointer-events: none;
}
.ruler-mark.major {
    height: 18px;
    font-weight: 700;
    color: var(--label-primary);
    border-left: 1.5px solid var(--border-strong);
}

.playhead {
    position: absolute;
    top: 0; bottom: 0;
    height: 100%; min-height: 320px;
    width: 3px;
    background-color: #ff3b30;
    left: 120px;
    z-index: 80;
    pointer-events: none;
    display: none;
    box-shadow: 0 0 10px rgba(255, 59, 48, 0.95), 0 0 3px #ffffff;
}
.playhead::before {
    content: '';
    position: absolute;
    top: 0px; left: -5px;
    width: 13px; height: 13px;
    background-color: #ff3b30;
    border: 2px solid #ffffff;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}

.editor-grid {
    display: flex;
    flex-direction: column;
    gap: 6px;
    position: relative;
    min-width: max-content;
    padding-top: 6px;
}
.track-row { display: flex; height: 46px; align-items: center; position: relative; }
.track-label {
    width: 120px;
    min-width: 120px;
    background-color: var(--bg-secondary);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    border-right: 1px solid var(--border-color);
    z-index: 10;
    position: sticky;
    left: 0;
    box-shadow: 2px 0 4px rgba(0, 0, 0, 0.02);
}
.track-meta { display: flex; flex-direction: column; gap: 1px; overflow: hidden; }
.track-meta .note-name {
    font-weight: 700;
    font-size: 11.5px;
    color: var(--label-primary);
    display: flex;
    align-items: center;
    gap: 5px;
}
.track-meta .horn-size { font-size: 9.5px; color: var(--label-secondary); }
.track-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex-shrink: 0; }

.btn-mute-track {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--label-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    flex-shrink: 0;
}
.btn-mute-track.is-muted { background-color: #fee2e2; border-color: #fca5a5; color: var(--accent-red); }

.track-timeline {
    flex-grow: 1;
    background-color: var(--bg-track);
    height: 100%;
    position: relative;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
    background-size: 40px 100%;
    cursor: crosshair;
    border: 1px solid var(--border-color);
    border-left: none;
}
.track-row.is-muted .track-timeline { opacity: 0.45; background-color: #f1f5f9; }

.note-block {
    position: absolute;
    height: 34px;
    top: 5px;
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.3);
    cursor: grab;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 6px;
    font-size: 10px;
    font-weight: 700;
    color: #ffffff;
    user-select: none;
    z-index: 20;
    border: 1px solid rgba(0, 0, 0, 0.15);
}
.note-block:active { cursor: grabbing; opacity: 0.95; }
.note-block.selected {
    outline: 2px solid #ffffff;
    box-shadow: 0 0 0 3px var(--accent-orange), 0 4px 12px rgba(255, 149, 0, 0.5);
    z-index: 30;
}
.note-block .btn-del-note {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.25);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8.5px;
    cursor: pointer;
}
.note-block .btn-del-note:hover { background: var(--accent-red); }

.resize-handle {
    width: 14px;
    height: 100%;
    position: absolute;
    right: 0; top: 0;
    cursor: ew-resize;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.25));
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    border-left: 1px solid rgba(255, 255, 255, 0.25);
}

.horns-specs-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 8px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}
.horn-badge {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    font-size: 11px;
}
.horn-pin {
    font-size: 9px;
    font-weight: 800;
    padding: 2px 4px;
    border-radius: 3px;
    color: white;
}

.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s;
}
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal-box {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
    width: 100%;
    max-width: 520px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transform: scale(0.95);
    transition: transform 0.25s;
}
.modal-overlay.active .modal-box { transform: scale(1); }

.sd-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 8px 0;
}

.sd-choice-card {
    background: var(--bg-primary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}
.sd-choice-card:hover {
    border-color: var(--accent-orange);
    background: rgba(255, 149, 0, 0.04);
}
.sd-choice-card h4 { font-size: 13px; font-weight: 700; color: var(--label-primary); }
.sd-choice-card p { font-size: 11px; color: var(--label-secondary); line-height: 1.4; margin: 0; }

.sd-progress-track {
    width: 100%;
    height: 14px;
    background-color: var(--bg-tertiary);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
    margin: 8px 0;
}
.sd-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-orange), #ff3b30);
    border-radius: 10px;
    transition: width 0.1s ease-out;
}

@keyframes bounce {
    0% { transform: translateY(0); }
    100% { transform: translateY(-8px); }
}

.studio-toast {
    position: fixed;
    top: 68px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: rgba(28, 28, 30, 0.88);
    backdrop-filter: blur(20px);
    color: #fff;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}
.studio-toast.show { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }

.sd-folder-diagram {
    background: #1c1c1e;
    color: #34c759;
    font-family: ui-monospace, Menlo, Monaco, monospace;
    font-size: 11px;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    line-height: 1.4;
    margin-top: 4px;
}
.shortcuts-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.shortcuts-table td { padding: 6px 4px; border-bottom: 1px solid var(--border-color); }
kbd {
    background: var(--bg-primary);
    border: 1px solid var(--border-strong);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: ui-monospace, Menlo, Monaco, monospace;
    font-size: 10.5px;
    font-weight: 700;
}

/* RESPONSIVIDADE MOBILE STRICT (TOUCH >= 44PX) */
@media (max-width: 850px) {
    .app-top-header {
        padding: 10px 14px;
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    .brand-identity {
        justify-content: space-between;
        width: 100%;
    }
    .top-actions-group {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr auto auto;
        gap: 6px;
    }
    .top-actions-group .btn-studio {
        width: 100%;
        min-height: 44px;
        font-size: 13px;
        padding: 0 8px;
    }
    .top-actions-group .select-studio {
        grid-column: 1 / -1;
        min-height: 44px;
        font-size: 13px;
    }
    .btn-icon {
        min-height: 44px;
        min-width: 44px;
    }

    .sd-hub-banner {
        flex-direction: column;
        align-items: flex-start;
        padding: 18px 16px;
        gap: 14px;
    }
    .sd-hub-actions {
        width: 100%;
    }
    .sd-hub-actions .btn-studio {
        width: 100%;
        min-height: 44px;
        font-size: 13px;
    }

    .main-content-flow { padding: 14px 10px 60px 10px; }
    
    .genre-filter-pill {
        min-height: 44px;
        padding: 0 16px;
        font-size: 13px;
    }

    .catalog-toolbar-row {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    .search-input-box {
        max-width: 100%;
        min-width: 100%;
    }
    .search-input-box input {
        min-height: 44px;
        font-size: 13px;
    }
    .selection-actions-box {
        width: 100%;
        display: flex;
        gap: 6px;
    }
    .selection-actions-box .btn-studio {
        flex: 1;
        min-height: 44px;
        font-size: 13px;
    }

    .songs-grid-cards { grid-template-columns: 1fr; }
    .song-card-buttons {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 6px;
        width: 100%;
    }
    .song-card-buttons .btn-card-action {
        justify-content: center;
        min-height: 44px;
        font-size: 13px;
    }

    .timeline-ruler, .playhead { margin-left: 70px; left: 70px; }
    .track-label { width: 70px; min-width: 70px; padding: 0 4px; }
    .track-meta .horn-size { display: none; }
    .sd-options-grid { grid-template-columns: 1fr; }
}