/* ===== Audio builder (/lyd-editor) =====
   Visual multi-track editor for audio ads. 100 px = 1 second on the timeline (no zoom in v1).
   Sidebar on the left lists assets the user can drag onto tracks; right side is the timeline. */

:root {
    --cp-audio-pps: 100; /* pixels per second — keep in sync with .cp-audio-track-area calc */
    --cp-audio-track-height: 96px;
    --cp-audio-track-header-w: 220px;
    --cp-audio-ruler-h: 36px;
    --cp-audio-sidebar-w: 320px;
}

.cp-audio-builder {
    display: grid;
    grid-template-columns: var(--cp-audio-sidebar-w) 1fr;
    gap: 20px;
    align-items: start;
    min-height: calc(100vh - 220px);
}

.cp-audio-builder-sidebar {
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: sticky;
    top: 12px;
}

.cp-audio-builder-main {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 0;
}

/* ----- Asset library ----- */

.cp-audio-asset-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 50vh;
    overflow-y: auto;
    padding: 4px 4px 4px 0;
}

.cp-audio-asset-row {
    display: flex;
    flex-direction: column;
}

.cp-audio-asset {
    position: relative;
    display: grid;
    grid-template-columns: 36px 1fr auto auto;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border: 1px solid var(--mud-palette-lines-default);
    border-radius: 10px;
    background-color: var(--mud-palette-surface);
    cursor: grab;
    overflow: hidden; /* clip the absolutely-positioned progress strip to the rounded corners */
    transition: border-color 120ms ease-in-out, box-shadow 120ms ease-in-out, transform 120ms ease-in-out;
}

    .cp-audio-asset:hover {
        border-color: var(--mud-palette-primary);
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
        transform: translateY(-1px);
    }

    .cp-audio-asset:active {
        cursor: grabbing;
    }

.cp-audio-asset-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background-color: var(--mud-palette-background-gray);
}

    .cp-audio-asset-icon.is-tts {
        background-color: rgba(var(--mud-palette-primary-rgb), 0.12);
    }

.cp-audio-asset-meta {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.cp-audio-asset-name {
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cp-audio-asset-duration {
    font-size: 0.75rem;
    color: var(--mud-palette-text-secondary);
}

/* Progress strip — absolutely positioned along the card's bottom edge so toggling it on/off
   doesn't reflow the asset list (no CLS). Card has overflow:hidden + rounded corners, so the
   strip naturally clips to the curve. */
.cp-audio-asset-progress {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 3px;
    background-color: var(--mud-palette-lines-default);
}

.cp-audio-asset-progress-bar {
    height: 100%;
    background-color: var(--mud-palette-primary);
    width: 0%;
}

/* ----- Timeline area ----- */

.cp-audio-timeline {
    border: 1px solid var(--mud-palette-lines-default);
    border-radius: 10px;
    background-color: var(--mud-palette-surface);
    overflow-x: auto;
    overflow-y: hidden;
    position: relative;
}

.cp-audio-timeline-inner {
    display: flex;
    flex-direction: column;
}

/* Ruler with second markers — labels are above the tick line, centered, never wrap. */
.cp-audio-ruler {
    position: relative;
    height: var(--cp-audio-ruler-h);
    border-bottom: 1px solid var(--mud-palette-lines-default);
    margin-left: var(--cp-audio-track-header-w);
    background-color: var(--mud-palette-background-gray);
}

.cp-audio-ruler-tick {
    position: absolute;
    top: 50%;
    bottom: 0;
    width: 1px;
    background-color: var(--mud-palette-lines-default);
}

.cp-audio-ruler-tick-label {
    position: absolute;
    bottom: calc(50% + 2px);
    transform: translateX(-50%);
    left: 0;
    font-size: 11px;
    color: var(--mud-palette-text-secondary);
    line-height: 1;
    white-space: nowrap;
    user-select: none;
    letter-spacing: 0.02em;
}

/* ----- Track row ----- */

.cp-audio-track {
    display: flex;
    height: var(--cp-audio-track-height);
    border-bottom: 1px solid var(--mud-palette-lines-default);
    position: relative;
}

    .cp-audio-track:last-child {
        border-bottom: none;
    }

.cp-audio-track-header {
    width: var(--cp-audio-track-header-w);
    flex-shrink: 0;
    padding: 10px 14px;
    border-right: 1px solid var(--mud-palette-lines-default);
    background-color: var(--mud-palette-background-gray);
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: sticky;
    left: 0;
    z-index: 2;
    justify-content: center;
}

.cp-audio-track-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.cp-audio-track-name {
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1 1 auto;
    min-width: 0;
}

.cp-audio-track-controls {
    display: flex;
    align-items: center;
    gap: 6px;
}

.cp-audio-track-volume {
    flex-grow: 1;
    min-width: 80px;
}

.cp-audio-track-volume-label {
    font-size: 0.7rem;
    color: var(--mud-palette-text-secondary);
    min-width: 36px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.cp-audio-track-area {
    flex-grow: 1;
    position: relative;
    background-image: linear-gradient(to right, transparent calc(100px - 1px), rgba(0, 0, 0, 0.06) calc(100px - 1px), rgba(0, 0, 0, 0.06) 100px);
    background-size: 100px 100%;
}

    .cp-audio-track-area.is-drop-target {
        background-color: rgba(var(--mud-palette-primary-rgb), 0.08);
        outline: 2px dashed var(--mud-palette-primary);
        outline-offset: -4px;
    }

/* ----- Clip ----- */

.cp-audio-clip {
    position: absolute;
    top: 10px;
    bottom: 10px;
    border-radius: 8px;
    background-color: rgba(var(--mud-palette-primary-rgb), 0.18);
    border: 1px solid var(--mud-palette-primary);
    color: var(--mud-palette-primary-text);
    padding: 6px 10px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    cursor: grab;
    user-select: none;
    transition: box-shadow 80ms ease-in-out;
}

    .cp-audio-clip:hover {
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.14);
    }

    .cp-audio-clip.is-dragging {
        opacity: 0.7;
        cursor: grabbing;
        box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
        z-index: 3;
    }

.cp-audio-clip-name {
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cp-audio-clip-meta {
    font-size: 0.72rem;
    opacity: 0.85;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

/* ----- Playhead ----- */

.cp-audio-playhead {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--mud-palette-primary);
    z-index: 4;
    pointer-events: none;
}

/* ----- Toolbar ----- */

.cp-audio-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border: 1px solid var(--mud-palette-lines-default);
    border-radius: 10px;
    background-color: var(--mud-palette-surface);
}

.cp-audio-toolbar-spacer {
    flex-grow: 1;
}

/* ----- Tiny TTS form embedded in the asset library ----- */

.cp-audio-tts-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px;
    border: 1px dashed var(--mud-palette-lines-default);
    border-radius: 10px;
    background-color: var(--mud-palette-background-gray);
}

.cp-audio-tts-form-title {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--mud-palette-text-secondary);
    letter-spacing: 0.06em;
}

.cp-audio-tts-cost-hint {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    line-height: 1.4;
    color: var(--mud-palette-text-secondary);
    padding: 0 2px;
}

    .cp-audio-tts-cost-hint.is-over-budget {
        color: var(--mud-palette-warning-darken, #b26a00);
        font-weight: 500;
    }

/* ----- Empty-state hints in the timeline body ----- */

.cp-audio-empty {
    padding: 28px;
    text-align: center;
    color: var(--mud-palette-text-secondary);
}