/* Drop Zone */

    /* ── Workspace layout ── */
    .workspace {
      display: grid;
      grid-template-columns: 1fr 320px;
      gap: 20px;
      align-items: start;
    }

    /* ── Preview panel ── */
    .preview-panel {
      border: 1px solid var(--border); background: var(--card); display: flex; flex-direction: column;
    }
    .panel-header {
      display: flex; align-items: center; justify-content: space-between;
      padding: 10px 16px; border-bottom: 1px solid var(--border); background: var(--bg);
    }
    .panel-header-left { display: flex; align-items: center; gap: 8px; }
    .panel-label { font-size: 10px; letter-spacing: 0.2em; color: var(--ink-light); text-transform: uppercase; }
    .shadow-code {
      font-size: 10px; color: var(--accent);
      background: var(--accent-muted); padding: 3px 10px; letter-spacing: 0.04em;
      max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    }

    .preview-canvas-wrap {
      flex: 1; min-height: 400px;
      display: flex; align-items: center; justify-content: center;
      padding: 40px;
      background: repeating-conic-gradient(#E8EAED 0% 25%, #F8F9FA 0% 50%) 0 0 / 16px 16px;
      overflow: hidden;
    }
    #previewCanvas {
      display: block;
      max-width: 100%; max-height: 480px;
      object-fit: contain;
    }

    .panel-footer {
      padding: 10px 16px; border-top: 1px solid var(--border); background: var(--bg);
      display: flex; align-items: center; justify-content: space-between;
    }

    /* ── Sidebar ── */
    .sidebar {
      display: flex; flex-direction: column; gap: 1px;
      background: var(--rule); border: 1px solid var(--border);
    }
    .sidebar-section { background: var(--card); padding: 16px; }
    .sidebar-title {
      font-size: 9px; letter-spacing: 0.25em;
      color: var(--ink-light); text-transform: uppercase; margin-bottom: 14px;
    }

    /* ── Direction compass ── */
    .direction-widget {
      display: flex; align-items: center; gap: 16px;
    }
    .compass-wrap { flex-shrink: 0; }
    .compass {
      width: 80px; height: 80px; border: 1px solid var(--border); background: var(--bg);
      position: relative; cursor: pointer; border-radius: 50%;
      flex-shrink: 0;
    }
    .compass-dot {
      width: 12px; height: 12px; background: var(--accent); border-radius: 50%;
      position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
      pointer-events: none;
    }
    .compass-center {
      width: 4px; height: 4px; background: var(--rule); border-radius: 50%;
      position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
      pointer-events: none;
    }
    .compass-line {
      position: absolute; top: 50%; left: 50%;
      width: 1px; background: var(--rule);
      transform-origin: top center;
      pointer-events: none;
    }

    /* Offset numeric displays */
    .offset-nums { flex: 1; display: flex; flex-direction: column; gap: 8px; }
    .offset-row { display: flex; align-items: center; gap: 8px; }
    .offset-label { font-size: 10px; color: var(--ink-light); width: 20px; flex-shrink: 0; }
    .offset-input {
      font-size: 13px; width: 64px; height: 30px;
      border: 1px solid var(--border); background: var(--bg); color: var(--ink);
      text-align: center; outline: none; padding: 0 4px; transition: border-color 0.15s;
    }
    .offset-input:focus { border-color: var(--ink); }
    .offset-unit { font-size: 10px; color: var(--ink-light); }

    /* Sliders */
    .slider-row {
      display: flex; align-items: center; gap: 10px; margin-bottom: 10px;
    }
    .slider-row:last-child { margin-bottom: 0; }
    .slider-row-label {
      font-size: 10px; color: var(--ink-light);
      letter-spacing: 0.1em; width: 56px; flex-shrink: 0;
    }
    .slider-val { font-size: 12px; color: var(--ink); min-width: 36px; text-align: right; }

    /* Color picker */
    .color-wrap { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
    .preset-color {
      width: 26px; height: 26px; border-radius: 5px;
      border: 1px solid transparent; cursor: pointer; transition: all 0.12s; flex-shrink: 0;
    }
    .preset-color:hover { transform: scale(1.15); border-color: var(--ink); }
    .preset-color.active { border: 2px solid var(--ink); }

    /* Presets strip */
    .preset-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
    .preset-btn {
      font-size: 10px; letter-spacing: 0.05em;
      border: 1px solid var(--border); background: transparent; color: var(--ink-light);
      padding: 8px 6px; cursor: pointer; transition: all 0.15s; text-align: center;
    }
    .preset-btn:hover { border-color: var(--blue); color: var(--blue); }

    /* BG color for canvas */
    .bg-row { display: flex; align-items: center; gap: 10px; }
    .bg-label { font-size: 11px; color: var(--ink); font-weight: 300; }

    /* Format buttons */

    /* Actions */
    .action-section { background: var(--card); padding: 16px; display: flex; flex-direction: column; gap: 8px; }
    .apply-btn {
      font-size: 11px; letter-spacing: 0.15em;
      background: var(--blue); color: var(--bg); border: none; height: 44px; width: 100%;
      cursor: pointer; transition: background 0.15s, transform 0.1s;
      display: flex; align-items: center; justify-content: center; gap: 8px;
    }
    .apply-btn:hover { background: var(--blue); }
    .apply-btn:active { transform: scale(0.98); }
    .apply-btn:disabled { opacity: 0.35; cursor: not-allowed; }
    .apply-btn:disabled:hover { background: var(--blue); }

    /* spinner */
    .is-applying .spinner { display: block; }
    .is-applying .btn-label { display: none; }

    /* Result strip */
    .result-strip { display: flex; align-items: stretch; border: 1px solid var(--border); background: var(--card); }
    .result-big { padding: 18px 24px; background: var(--blue); color: white; display: flex; flex-direction: column; justify-content: center; gap: 2px; flex-shrink: 0; }
    .result-big-label { font-size: 9px; letter-spacing: 0.2em; color: rgba(255,255,255,0.45); text-transform: uppercase; }
    .result-big-val   { font-size: 13px; font-weight: 400; color: white; letter-spacing: 0.05em; max-width: 200px; }
    .result-details { display: flex; flex: 1; flex-wrap: wrap; }
    .result-item { flex: 1; padding: 14px 18px; border-right: 1px solid var(--border); display: flex; flex-direction: column; justify-content: center; gap: 3px; min-width: 100px; }
    .result-item:last-child { border-right: none; }
    .result-key { font-size: 9px; letter-spacing: 0.2em; color: var(--ink-light); text-transform: uppercase; }
    .result-val { font-size: 15px; color: var(--ink); }

    @media (max-width: 960px) {
      header, main, .page-hero, footer { padding-left: 20px; padding-right: 20px; }
      .workspace { grid-template-columns: 1fr; }
      .sidebar { order: -1; }
      .preset-btns { grid-template-columns: repeat(4, 1fr); }
    }