.merge-heading { display: flex; align-items: center; justify-content: space-between; gap: .5rem; }
.merge-heading h2, .merge-trim legend { font-size: .875rem; font-weight: 600; }
.merge-heading button { font-size: .8125rem; }
.merge-hint { color: var(--color-muted); font-size: .75rem; margin-block: .375rem .75rem; }
.merge-clips { display: grid; gap: .5rem; padding: 0; list-style: none; }
.merge-clip { position: relative; display: grid; grid-template-columns: 2.75rem minmax(0, 1fr); border: 1px solid var(--color-line); border-radius: .625rem; background: var(--color-surface); }
.merge-clip.is-selected { border-color: var(--color-primary); }
.merge-clip.is-drop-target { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.merge-clip.is-dragging { z-index: 5; opacity: .8; box-shadow: 0 .25rem 1rem #0002; }
.merge-grip { grid-row: 1 / 3; align-self: stretch; border: 0; background: transparent; color: var(--color-muted); cursor: grab; touch-action: none; font-size: 1.25rem; }
.merge-select { display: block; width: 100%; min-height: 2.75rem; min-width: 0; text-align: start; border: 0; padding: .5rem .5rem 0 0; background: transparent; }
.merge-select strong { display: block; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; font-size: .8125rem; }
.merge-select small { display: block; color: var(--color-muted); font-size: .6875rem; }
.merge-row-actions { display: flex; justify-content: flex-end; gap: .25rem; padding-inline: .25rem; }
.merge-row-actions button { font-size: .875rem; }
.merge-row-actions button:last-child { margin-left: auto; }
.merge-trim, .merge-output { min-width: 0; border: 0; border-top: 1px solid var(--color-line); padding: 1rem 0 0; margin-top: 1rem; }
.merge-trim legend { padding: 1rem 0 .5rem; }
.merge-output { display: grid; gap: .375rem; }
.merge-output label { font-size: .75rem; color: var(--color-muted); }
.merge-output select { width: 100%; margin-bottom: .5rem; }
.merge-segment { position: absolute; top: 0; min-width: 0; height: 100%; padding: 0; border: 1px solid var(--color-surface); border-radius: .25rem; background: var(--slate-200); overflow: hidden; }
.merge-segment.is-selected { border: 3px solid var(--color-primary); }
.merge-segment img { width: 100%; height: 100%; object-fit: cover; opacity: .8; }
.merge-segment span { position: absolute; top: .25rem; left: .25rem; background: var(--color-surface); color: var(--color-text); font-size: .6875rem; padding: 0 .25rem; border-radius: .125rem; }
.merge-settings [disabled] { opacity: .5; }
.merge-canvas { position: relative; flex-shrink: 0; overflow: hidden; background: black; }
.merge-canvas video { position: absolute; inset: 0; width: 100%; height: 100%; }
.merge-crossfade { display: flex; align-items: center; gap: .5rem; min-height: 2.75rem; cursor: pointer; }
.merge-crossfade input { width: 1.125rem; height: 1.125rem; accent-color: var(--color-primary); }
.merge-crossfade span { color: var(--color-text); font-size: .875rem; }
.merge-transition { position: absolute; top: 0; bottom: 0; pointer-events: none; z-index: 1; border-inline: 1px solid var(--color-primary); background: repeating-linear-gradient(135deg, transparent, transparent 4px, #ffffff60 4px, #ffffff60 8px); }
.merge-music { border-top: 1px solid var(--color-line); margin-top: 1rem; padding-top: 1rem; }