:root {
      --bg: #0d0f1a;
      --surface: #151827;
      --surface2: #1e2236;
      --surface3: #252a42;
      --accent: #3665b6;
      --accent-h: #81e2f8;
      --success: #70db97;
      --danger: #ef4444;
      --warn: #f59e0b;
      --text: #e2e8f0;
      --muted: #94a3b8;
      --border: #5b515f;
      --r: 10px;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }

    /* ── Header ── */
    header { background: var(--surface); border-bottom: 1px solid var(--border); padding: 14px 24px; display: flex; align-items: center; gap: 10px; }
    header h1 { font-size: 1.15rem; font-weight: 700; letter-spacing: -0.02em; }
    .pill { font-size: 0.7rem; padding: 2px 9px; border-radius: 20px; background: rgba(99,102,241,.18); color: var(--accent); font-weight: 600; }
    .badge-local { font-size: 0.7rem; padding: 2px 9px; border-radius: 20px; background: rgba(34,197,94,.15); color: var(--success); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; }
    .gh-link { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; font-size: 0.78rem; font-weight: 600; color: var(--muted); text-decoration: none; padding: 5px 12px; border-radius: 7px; border: 1px solid var(--border); background: var(--surface2); transition: color .15s, border-color .15s, background .15s; white-space: nowrap; }
    .gh-link:hover { color: var(--text); border-color: var(--accent); background: var(--surface3); }
    @media (max-width: 600px) { .gh-link span { display: none; } .gh-link { padding: 5px 9px; } }

    /* ── Layout ── */
    .container { max-width: 1200px; margin: 0 auto; padding: 20px 24px; }
    .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    @media (max-width: 820px) { .grid { grid-template-columns: 1fr; } }

    /* ── Cards ── */
    .card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
    .card + .card { margin-top: 16px; }
    .card-header { padding: 11px 16px; border-bottom: 1px solid var(--border); font-size: 0.75rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .07em; display: flex; align-items: center; justify-content: space-between; }
    .card-body { padding: 16px; }

    /* ── Buttons ── */
    .btn { display: inline-flex; align-items: center; gap: 6px; padding: 9px 18px; border-radius: 7px; border: none; cursor: pointer; font-size: 0.85rem; font-weight: 600; transition: background .15s, opacity .15s; white-space: nowrap; }
    .btn:disabled { opacity: .35; cursor: not-allowed; filter: blur(0.3px); }
    .btn-primary { background: var(--accent); color: #fff; }
    .btn-primary:hover:not(:disabled) { background: var(--accent-h); }
    .btn-success { background: var(--success); color: #fff; }
    .btn-success:hover:not(:disabled) { background: #16a34a; }
    .btn-ghost { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
    .btn-ghost:hover:not(:disabled) { background: var(--surface3); }
    .btn-sm { padding: 5px 12px; font-size: 0.78rem; }
    .btn-block { width: 100%; justify-content: center; }

    /* ── Status bar ── */
    .statusbar { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 11px 16px; display: flex; align-items: center; gap: 10px; margin-bottom: 18px; }
    .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--danger); flex-shrink: 0; transition: background .3s; }
    .dot.loaded { background: var(--success); }
    .dot.loading { background: var(--warn); animation: blink 1s infinite; }
    @keyframes blink { 0%,100%{opacity:1} 50%{opacity:.25} }
    #statusText { font-size: 0.82rem; color: var(--muted); }
    .ml-auto { margin-left: auto; }

    /* ── Upload zone ── */
    .drop-zone { border: 2px dashed var(--border); border-radius: var(--r); padding: 36px 20px; text-align: center; cursor: pointer; transition: border-color .2s, background .2s; background: var(--surface2); }
    .drop-zone:hover, .drop-zone.over { border-color: var(--accent); background: rgba(99,102,241,.07); }
    .drop-zone svg { width: 36px; height: 36px; color: var(--muted); margin-bottom: 10px; }
    .drop-zone p { font-size: 0.83rem; color: var(--muted); }
    .drop-zone strong { color: var(--accent); }
    #fileInput { display: none; }

    /* ── Video ── */
    video, audio { width: 100%; border-radius: 7px; background: #000; display: block; }
    .file-meta { font-size: 0.78rem; color: var(--muted); margin-top: 8px; display: flex; justify-content: space-between; align-items: center; }

    /* ── Trim timeline ── */
    .trim-row { display: flex; gap: 12px; margin-top: 10px; }
    .trim-col { flex: 1; }
    .trim-col label { font-size: 0.75rem; color: var(--muted); display: block; margin-bottom: 4px; }
    input[type="range"] { width: 100%; accent-color: var(--accent); cursor: pointer; }
    .time-val { font-size: 0.78rem; color: var(--text); text-align: center; margin-top: 2px; }
    .timeline { position: relative; height: 32px; background: var(--surface2); border-radius: 5px; margin: 10px 0 6px; overflow: hidden; }
    .tl-fill { position: absolute; height: 100%; background: rgba(99,102,241,.3); border-left: 2px solid var(--accent); border-right: 2px solid var(--accent); transition: left .05s, width .05s; }
    .tl-labels { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--muted); }

    /* ── Op picker ── */
    .ops-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-bottom: 14px; }
    .op-tile { background: var(--surface2); border: 2px solid var(--border); border-radius: 8px; padding: 9px 10px; cursor: pointer; text-align: center; font-size: 0.8rem; font-weight: 600; color: var(--muted); transition: all .15s; }
    .op-tile:hover { border-color: var(--accent); color: var(--accent); }
    .op-tile.active { border-color: var(--accent); background: rgba(99,102,241,.12); color: var(--accent); }
    .op-tile.disabled { opacity: 0.4; cursor: not-allowed; }
    .op-tile.disabled:hover { border-color: var(--border); color: var(--muted); }
    .op-tile i { display: block;     font-size: 30px;
    margin-bottom: 12px; }

    /* ── Op panels ── */
    .op-panel { background: var(--surface2); border-radius: 8px; padding: 13px; margin-bottom: 14px; }
    .op-panel h4 { font-size: 0.75rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 10px; }
    .form-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
    .form-group { flex: 1; min-width: 110px; }
    label.lbl { font-size: 0.78rem; color: var(--muted); display: block; margin-bottom: 4px; }
    input[type="number"], input[type="text"], select {
      width: 100%; background: var(--surface); border: 1px solid var(--border);
      border-radius: 6px; color: var(--text); padding: 7px 10px; font-size: 0.83rem; outline: none;
    }
    textarea {
      width: 100%; background: var(--surface); border: 1px solid var(--border);
      border-radius: 6px; color: var(--text); padding: 7px 10px; font-size: 0.78rem; outline: none;
      font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace; resize: vertical; min-height: 76px; line-height: 1.55;
    }
    input:focus, select:focus, textarea:focus { border-color: var(--accent); }
    select:disabled { opacity: 0.6; cursor: not-allowed; background: var(--surface2); }
    .cmd-preview { font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace; font-size: 0.72rem; background: #080a10; color: #7dd3fc; padding: 10px 12px; border-radius: 6px; word-break: break-all; line-height: 1.6; margin-top: 4px; white-space: pre-wrap; min-height: 36px; }
    .hint { font-size: 0.72rem; color: var(--muted); margin-top: 6px; }

    /* ── Operation stack (chaining) ── */
    .mode-toggle { display: inline-flex; background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; padding: 3px; gap: 3px; margin-bottom: 12px; }
    .mode-btn { padding: 6px 16px; border-radius: 6px; font-size: 0.8rem; font-weight: 600; color: var(--muted); cursor: pointer; border: none; background: transparent; transition: background .15s, color .15s; }
    .mode-btn:hover { color: var(--text); }
    .mode-btn.active { background: var(--accent); color: #fff; }
    .stack-empty { font-size: 0.8rem; color: var(--muted); padding: 10px 4px; text-align: center; }
    .stack-item { display: flex; align-items: center; gap: 8px; background: var(--surface); border: 1px solid var(--border); border-radius: 7px; padding: 7px 9px; margin-bottom: 6px; }
    .stack-idx { flex-shrink: 0; width: 20px; height: 20px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 0.72rem; font-weight: 700; display: inline-flex; align-items: center; justify-content: center; }
    .stack-label { flex: 1; font-size: 0.8rem; color: var(--text); font-weight: 600; display: flex; align-items: center; gap: 7px; min-width: 0; }
    .stack-label i { color: var(--accent); flex-shrink: 0; }
    .stack-controls { display: inline-flex; gap: 4px; flex-shrink: 0; }
    .stack-mini { width: 26px; height: 26px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface2); color: var(--muted); cursor: pointer; font-size: 0.72rem; display: inline-flex; align-items: center; justify-content: center; transition: color .15s, border-color .15s; }
    .stack-mini:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); }

    /* Batch mode */
    .batch-toggle { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 5px; font-size: 0.7rem; font-weight: 600; cursor: pointer; background: var(--surface2); border: 1px solid var(--border); color: var(--muted); transition: all .15s; }
    .batch-toggle:hover { background: var(--surface3); color: var(--text); }
    .batch-toggle.active { background: var(--accent); color: #fff; border-color: var(--accent); }
    .batch-queue-list { display: none; }
    .batch-queue-list.visible { display: block; margin-top: 12px; }
    .batch-file-item { display: flex; align-items: center; gap: 8px; background: var(--surface2); border: 1px solid var(--border); border-radius: 6px; padding: 8px 10px; margin-bottom: 4px; font-size: 0.78rem; }
    .batch-file-status { flex-shrink: 0; width: 16px; height: 16px; display: flex; align-items: center; justify-content: center; }
    .batch-file-status.pending { color: var(--muted); }
    .batch-file-status.processing { color: var(--accent); animation: blink 1s infinite; }
    .batch-file-status.done { color: var(--success); }
    .batch-file-status.error { color: var(--danger); }
    .batch-file-name { flex: 1; color: var(--text); word-break: break-word; }
    .batch-file-actions { flex-shrink: 0; display: flex; gap: 6px; }
    .batch-btn-sm { border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 4px; padding: 4px 6px; cursor: pointer; font-size: 0.65rem; transition: 150ms; }
    .batch-btn-sm:hover { border-color: var(--accent); color: var(--accent); background: var(--surface2); }
    .card.disabled { opacity: 0.5; pointer-events: none; }
    .stack-mini.danger:hover:not(:disabled) { color: var(--danger); border-color: var(--danger); }
    .stack-mini:disabled { opacity: .3; cursor: not-allowed; }
    .stack-note { font-size: 0.78rem; color: var(--warn); background: rgba(234,179,8,.08); border: 1px solid rgba(234,179,8,.25); border-radius: 7px; padding: 9px 11px; margin-top: 6px; display: flex; align-items: center; gap: 7px; }
    .hashcmd-banner { font-size: 0.82rem; border-radius: 7px; padding: 10px 14px; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
    .hashcmd-banner.ok  { color: var(--accent-h); background: rgba(54,101,182,.12); border: 1px solid rgba(54,101,182,.35); }
    .hashcmd-banner.err { color: var(--danger); background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.3); }

    .crop-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
    .crop-summary { font-size: 0.78rem; color: var(--text); font-weight: 600; }
    .crop-editor { border: 1px solid var(--border); border-radius: 7px; background: #080a10; padding: 8px; }
    .crop-stage { position: relative; overflow: hidden; border-radius: 5px; background: #05060a; touch-action: none; user-select: none; }
    .crop-stage canvas { display: block; width: 100%; height: auto; }
    .crop-empty { padding: 28px 14px; text-align: center; color: var(--muted); font-size: 0.8rem; background: var(--surface); border-radius: 5px; }
    .crop-selection {
      position: absolute;
      border: 2px solid var(--accent);
      box-shadow: 0 0 0 9999px rgba(2, 6, 23, .58);
      cursor: move;
      min-width: 18px;
      min-height: 18px;
    }
    .crop-selection::before {
      content: "";
      position: absolute;
      inset: 0;
      pointer-events: none;
      background:
        linear-gradient(to right, transparent 33.333%, rgba(255,255,255,.22) 33.333%, rgba(255,255,255,.22) calc(33.333% + 1px), transparent calc(33.333% + 1px), transparent 66.666%, rgba(255,255,255,.22) 66.666%, rgba(255,255,255,.22) calc(66.666% + 1px), transparent calc(66.666% + 1px)),
        linear-gradient(to bottom, transparent 33.333%, rgba(255,255,255,.22) 33.333%, rgba(255,255,255,.22) calc(33.333% + 1px), transparent calc(33.333% + 1px), transparent 66.666%, rgba(255,255,255,.22) 66.666%, rgba(255,255,255,.22) calc(66.666% + 1px), transparent calc(66.666% + 1px));
    }
    .crop-handle {
      position: absolute;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      border: 2px solid var(--surface);
      background: var(--accent);
      box-shadow: 0 0 0 1px rgba(255,255,255,.25);
    }
    .crop-handle[data-handle="nw"] { left: -7px; top: -7px; cursor: nwse-resize; }
    .crop-handle[data-handle="n"]  { left: 50%; top: -7px; transform: translateX(-50%); cursor: ns-resize; }
    .crop-handle[data-handle="ne"] { right: -7px; top: -7px; cursor: nesw-resize; }
    .crop-handle[data-handle="e"]  { right: -7px; top: 50%; transform: translateY(-50%); cursor: ew-resize; }
    .crop-handle[data-handle="se"] { right: -7px; bottom: -7px; cursor: nwse-resize; }
    .crop-handle[data-handle="s"]  { left: 50%; bottom: -7px; transform: translateX(-50%); cursor: ns-resize; }
    .crop-handle[data-handle="sw"] { left: -7px; bottom: -7px; cursor: nesw-resize; }
    .crop-handle[data-handle="w"]  { left: -7px; top: 50%; transform: translateY(-50%); cursor: ew-resize; }

    /* ── Progress ── */
    .progress-wrap { margin: 12px 0; width: 100%; }
    .progress-header { display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--muted); margin-bottom: 5px; }
    .progress-track { height: 5px; background: var(--surface3); border-radius: 3px; overflow: hidden; width: 100%; }
    .progress-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width .2s ease; width: 0%; }

    /* ── Log ── */
    .log-shell { background: #080a10; border-radius: 0 0 var(--r) var(--r); overflow: hidden; }
    .log-current {
      position: sticky;
      top: 0;
      z-index: 1;
      font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
      font-size: 0.73rem;
      line-height: 1.55;
      padding: 10px 12px;
      background: #0f1420;
      border-bottom: 1px solid rgba(129, 226, 248, 0.16);
      color: #e2e8f0;
    }
    .log-current-label { color: #94a3b8; margin-right: 8px; }
    .log-current-value { color: #7dd3fc; word-break: break-all; }
    .log { font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace; font-size: 0.73rem; background: #080a10; color: #7dd3fc; padding: 12px; height: 130px; overflow-y: auto; line-height: 1.55; }
    .log-line { word-break: break-all; }
    .log-line.err { color: #fca5a5; }
    .log-line.ok  { color: #86efac; }

    /* ── Output ── */
    .out-empty { text-align: center; padding: 28px; font-size: 0.83rem; color: var(--muted); }
    .out-actions { display: flex; gap: 10px; margin-top: 12px; align-items: center; flex-wrap: wrap; }
    .out-size { font-size: 0.78rem; color: var(--muted); }

    .size-estimate { background: var(--surface2); border-radius: 7px; padding: 9px 14px; font-size: 0.82rem; color: var(--muted); display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
    .size-estimate strong { color: var(--text); font-size: 0.88rem; }
    .size-delta { font-size: 0.75rem; font-weight: 600; }
    .size-delta.smaller { color: var(--success); }
    .size-delta.larger  { color: var(--danger); }

    .hidden { display: none !important; }
    .tag { font-size: 0.7rem; font-weight: 600; padding: 1px 7px; border-radius: 4px; background: rgba(99,102,241,.18); color: var(--accent); margin-left: 6px; }

    /* ── Responsive ── */
    @media (max-width: 480px) {
      header { padding: 10px 14px; }
      header h1 { font-size: 1rem; }

      .container { padding: 10px 12px; }

      .statusbar { flex-wrap: wrap; padding: 10px 12px; gap: 8px; }
      .statusbar .ml-auto { margin-left: 0; width: 100%; }
      .statusbar .btn { width: 100%; justify-content: center; }

      .card-body { padding: 12px; }
      .card-header { padding: 9px 12px; }

      .drop-zone { padding: 24px 14px; }

      .trim-row { flex-direction: column; gap: 6px; }

      .ops-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
      .op-tile { padding: 8px 6px; font-size: 0.74rem; }

      .form-row { gap: 6px; }
      .form-group { min-width: 0; flex-basis: calc(50% - 3px); }
      .crop-toolbar { align-items: flex-start; }
      .crop-summary { flex: 1 1 100%; }
      .crop-handle { width: 16px; height: 16px; }
      .crop-handle[data-handle="nw"] { left: -9px; top: -9px; }
      .crop-handle[data-handle="n"]  { top: -9px; }
      .crop-handle[data-handle="ne"] { right: -9px; top: -9px; }
      .crop-handle[data-handle="e"]  { right: -9px; }
      .crop-handle[data-handle="se"] { right: -9px; bottom: -9px; }
      .crop-handle[data-handle="s"]  { bottom: -9px; }
      .crop-handle[data-handle="sw"] { left: -9px; bottom: -9px; }
      .crop-handle[data-handle="w"]  { left: -9px; }

      .size-estimate { flex-wrap: wrap; gap: 4px; }

      .log-current { font-size: 0.68rem; padding: 9px 10px; }
      .log { height: 90px; font-size: 0.68rem; padding: 10px; }

      .out-actions { flex-direction: column; align-items: stretch; }
      .out-actions .btn { justify-content: center; }
      .out-actions .out-size { text-align: center; }
    }

    @media (max-width: 380px) {
      .ops-grid { grid-template-columns: repeat(4, 1fr); }
    }

    /* ── Raw FFmpeg example library ── */
    .raw-examples-details { border: 1px solid var(--border); border-radius: 7px; overflow: hidden; margin-bottom: 10px; }
    .raw-examples-details summary { padding: 8px 11px; cursor: pointer; font-size: 0.75rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; user-select: none; list-style: none; display: flex; align-items: center; gap: 6px; background: var(--surface3); }
    .raw-examples-details summary::-webkit-details-marker { display: none; }
    .raw-examples-details summary::marker { display: none; }
    .rex-arrow { display: inline-block; font-style: normal; transition: transform .18s; font-size: 0.7rem; }
    .raw-examples-details[open] .rex-arrow { transform: rotate(90deg); }
    .rex-list { padding: 7px; display: grid; gap: 5px; background: var(--surface2); }
    .raw-example-btn { width: 100%; background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 7px 10px; cursor: pointer; text-align: left; display: flex; align-items: baseline; gap: 10px; transition: border-color .15s, background .15s; }
    .raw-example-btn:hover { border-color: var(--accent); background: rgba(99,102,241,.07); }
    .rex-label { font-size: 0.8rem; font-weight: 600; color: var(--text); white-space: nowrap; flex-shrink: 0; }
    .rex-code { font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace; font-size: 0.7rem; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; min-width: 0; }
    /* ── Raw example "+2nd file" badge ── */
    .rex-input2-badge { font-size: 0.68rem; font-weight: 700; padding: 1px 6px; border-radius: 4px; background: rgba(245,158,11,.18); color: var(--warn); white-space: nowrap; flex-shrink: 0; }
    @keyframes input2-pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(245,158,11,0); } 30% { box-shadow: 0 0 0 3px rgba(245,158,11,.55); } }
    .input2-highlight { animation: input2-pulse 1s ease; border-radius: 7px; }