.workspace {
    flex: 1;
    display: grid;
    grid-template-columns: 288px 1fr 272px;
    gap: 0;
    min-height: 0;
  }

  .panel {
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 22px 20px;
    display: flex;
    flex-direction: column;
    gap: 22px;
    overflow-y: auto;
  }

  .section-label {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--text3);
    margin-bottom: 10px;
  }

  .hint-text {
    font-size: 12px;
    color: var(--text3);
    margin-top: 8px;
    line-height: 1.65;
  }

  .upload-zone {
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius);
    padding: 30px 16px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
    background: var(--surface-muted);
  }
  .upload-zone:hover,
  .upload-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-soft);
    box-shadow: 0 0 0 4px var(--accent-glow);
  }
  .upload-zone svg {
    width: 32px;
    height: 32px;
    stroke: var(--text3);
    margin-bottom: 10px;
    transition: stroke 0.2s var(--ease);
  }
  .upload-zone:hover svg,
  .upload-zone.drag-over svg { stroke: var(--accent); }
  .upload-zone p { font-size: 13px; color: var(--text2); line-height: 1.65; }
  .upload-zone em { font-style: normal; color: var(--accent); font-weight: 500; }
  #file-input { display: none; }

  .grid-picker {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
  }
  .grid-opt {
    aspect-ratio: 1;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-muted);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: border-color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease), color 0.2s var(--ease);
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text3);
  }
  .grid-opt:hover {
    border-color: var(--border-strong);
    color: var(--text2);
    box-shadow: var(--shadow-sm);
  }
  .grid-opt.active {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
  }
  .grid-opt .mini { display: grid; gap: 2px; width: 28px; height: 28px; }
  .grid-opt .mini span { background: currentColor; border-radius: 2px; opacity: 0.45; }
  .grid-opt.active .mini span { opacity: 0.7; }

  .trim-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .trim-row label { font-size: 13px; color: var(--text2); }

  .toggle { position: relative; width: 40px; height: 22px; }
  .toggle input { opacity: 0; width: 0; height: 0; }
  .toggle-track {
    position: absolute;
    inset: 0;
    background: var(--border);
    border-radius: 11px;
    cursor: pointer;
    transition: background 0.25s var(--ease);
  }
  .toggle input:checked + .toggle-track { background: var(--accent); }
  .toggle-track::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: white;
    top: 3px;
    left: 3px;
    transition: transform 0.25s var(--ease);
    box-shadow: 0 1px 3px rgba(20, 24, 32, 0.15);
  }
  .toggle input:checked + .toggle-track::after { transform: translateX(18px); }

  .slider-row { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
  .slider-row input[type=range] {
    flex: 1;
    -webkit-appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--border);
    outline: none;
    cursor: pointer;
  }
  .slider-row input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--surface);
    border: 2px solid var(--accent);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
  }
  .slider-val {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text3);
    min-width: 28px;
    text-align: right;
  }

  .format-row { display: flex; gap: 8px; }
  .fmt-btn {
    flex: 1;
    padding: 8px 6px;
    font-family: var(--mono);
    font-size: 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-muted);
    color: var(--text2);
    cursor: pointer;
    transition: all 0.2s var(--ease);
    letter-spacing: 0.03em;
  }
  .fmt-btn:hover { border-color: var(--border-strong); color: var(--text); }
  .fmt-btn.active {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 500;
  }

  .btn-primary {
    width: 100%;
    padding: 12px 16px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: background 0.2s var(--ease), transform 0.15s var(--ease), box-shadow 0.2s var(--ease);
    margin-top: auto;
    box-shadow: 0 2px 8px var(--accent-glow);
  }
  .btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 4px 14px var(--accent-glow);
  }
  .btn-primary:active:not(:disabled) { transform: translateY(1px); }
  .btn-primary:disabled {
    background: var(--surface2);
    color: var(--text3);
    cursor: not-allowed;
    box-shadow: none;
  }

  .canvas-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 36px 32px;
    gap: 20px;
    background-color: #e8eaef;
    background-image:
      linear-gradient(45deg, #dfe2e8 25%, transparent 25%),
      linear-gradient(-45deg, #dfe2e8 25%, transparent 25%),
      linear-gradient(45deg, transparent 75%, #dfe2e8 75%),
      linear-gradient(-45deg, transparent 75%, #dfe2e8 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0;
    position: relative;
    overflow: hidden;
  }

  .canvas-wrap {
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius);
    overflow: hidden;
    background: white;
    outline: 1px solid rgba(255, 255, 255, 0.6);
  }

  #preview-canvas {
    display: block;
    max-width: 100%;
    cursor: crosshair;
  }

  .crop-hint {
    font-size: 12px;
    color: var(--text3);
    z-index: 1;
  }

  .empty-state {
    z-index: 1;
    text-align: center;
    padding: 24px;
  }
  .empty-state svg {
    width: 52px;
    height: 52px;
    stroke: var(--border-strong);
    margin-bottom: 14px;
  }
  .empty-state p { font-size: 14px; color: var(--text3); }

  .output-panel {
    background: var(--surface);
    border-left: 1px solid var(--border);
    padding: 22px 18px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .output-grid { display: grid; gap: 8px; }

  .output-cell {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    aspect-ratio: 1;
    transition: box-shadow 0.2s var(--ease);
  }
  .output-cell:hover { box-shadow: var(--shadow-md); }

  .output-cell canvas {
    width: 100%;
    height: 100%;
    display: block;
  }

  .output-cell .dl-btn {
    position: absolute;
    inset: 0;
    background: rgba(20, 24, 32, 0.52);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s var(--ease);
    cursor: pointer;
    font-family: var(--mono);
    font-size: 11px;
    color: white;
    letter-spacing: 0.04em;
    border: none;
  }
  .output-cell:hover .dl-btn { opacity: 1; }

  .btn-dl-all {
    width: 100%;
    padding: 10px 14px;
    background: var(--surface);
    color: var(--text2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s var(--ease);
  }
  .btn-dl-all:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
  }

  .info-row {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text3);
    letter-spacing: 0.02em;
    display: flex;
    justify-content: space-between;
  }

  .crop-controls {
    display: flex;
    gap: 10px;
    z-index: 1;
    padding: 6px 10px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }
  .crop-btn {
    padding: 7px 16px;
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text2);
    cursor: pointer;
    transition: all 0.2s var(--ease);
  }
  .crop-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
  }
  .crop-btn.confirm {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
  }
  .crop-btn.confirm:hover {
    background: var(--accent-hover);
    color: white;
  }

  .mode-tab {
    display: flex;
    gap: 0;
    padding: 3px;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
  }
  .mode-tab button {
    flex: 1;
    padding: 8px 12px;
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 500;
    background: transparent;
    border: none;
    border-radius: calc(var(--radius-sm) - 2px);
    color: var(--text3);
    cursor: pointer;
    transition: all 0.2s var(--ease);
  }
  .mode-tab button:hover:not(.active) { color: var(--text2); }
  .mode-tab button.active {
    background: var(--surface);
    color: var(--accent);
    box-shadow: var(--shadow-sm);
  }

  .filename-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
  }
  .filename-row input {
    flex: 1;
    padding: 8px 10px;
    font-family: var(--mono);
    font-size: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    outline: none;
    transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  }
  .filename-row input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
  }
  .filename-row span {
    font-size: 12px;
    color: var(--text3);
    white-space: nowrap;
  }

  .meta-badge {
    z-index: 1;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text2);
    letter-spacing: 0.02em;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(6px);
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
  }
  @media (max-width: 960px) {
    .workspace {
      grid-template-columns: 1fr;
      grid-template-rows: auto 1fr auto;
    }
    .panel {
      border-right: none;
      border-bottom: 1px solid var(--border);
      max-height: none;
    }
    .output-panel {
      border-left: none;
      border-top: 1px solid var(--border);
      max-height: 280px;
    }
    .canvas-area { min-height: 360px; }
  }