:root {
      --ig-a: #FF0000;
      --ig-b: #CC0000;
      --ig-c: #990000;
    }

.ig-badge { font-size: 11px; color: white; padding: 4px 12px; letter-spacing: 0.1em; background: linear-gradient(45deg, var(--ig-a), var(--ig-b), var(--ig-c)); }
    .subtitle { font-size: 12px; color: var(--ink-light); font-weight: 300; letter-spacing: 0.1em; border-left: 2px solid var(--accent); padding-left: 10px; }

    /* Drop Zone */

    /* Format cards */
    .section-eyebrow { font-size: 10px; letter-spacing: 0.25em; color: var(--ink-light); text-transform: uppercase; padding-bottom: 12px; border-bottom: 1px solid var(--ink); }
    .format-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(148px,1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--border); border-top: none; }
    .format-card { background: var(--card); padding: 14px 14px 12px; cursor: pointer; transition: background 0.15s; border: none; text-align: left; display: flex; flex-direction: column; gap: 4px; position: relative; }
    .format-card:hover { background: #FFFFFF; }
    .format-card.active { background: var(--blue); }
    .format-card.active::after { content: '✓'; position: absolute; top: 10px; right: 12px; font-size: 11px; color: white; }
    .ratio-box { background: var(--rule); border: 1px solid var(--border); flex-shrink: 0; margin-bottom: 4px; }
    .format-card.active .ratio-box { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.25); }
    .fc-name { font-size: 13px; font-weight: 400; letter-spacing: 0.03em; color: var(--ink); }
    .format-card.active .fc-name { color: white; }
    .fc-size { font-size: 10px; color: var(--ink-light); }
    .format-card.active .fc-size { color: rgba(255,255,255,0.5); }
    .fc-ratio { font-size: 9px; color: var(--ink-xlight); }
    .format-card.active .fc-ratio { color: rgba(255,255,255,0.25); }

    /* Options bar */
    .options-bar { display: flex; align-items: stretch; border: 1px solid var(--border); background: var(--card); flex-wrap: wrap; }
    .opt-section { display: flex; align-items: center; padding: 0 20px; gap: 12px; border-right: 1px solid var(--border); flex-shrink: 0; }
    .opt-section:last-child { border-right: none; }
    .opt-label { font-size: 10px; letter-spacing: 0.2em; color: var(--ink-light); text-transform: uppercase; white-space: nowrap; }
    .mode-btns { display: flex; }
    .mode-btn { font-size: 10px; letter-spacing: 0.08em; padding: 8px 14px; border: 1px solid var(--border); background: transparent; color: var(--ink-light); cursor: pointer; transition: all 0.15s; margin-left: -1px; white-space: nowrap; }
    .mode-btn:first-child { margin-left: 0; }
    .mode-btn:hover:not(.active) { border-color: var(--blue); color: var(--blue); z-index: 1; }
    .mode-btn.active { background: var(--blue); color: #fff; border-color: var(--blue); z-index: 1; }
    .color-wrap { display: flex; align-items: center; gap: 8px; }

    /* Crop editor */
    .crop-canvas-wrap:active { cursor: grabbing; }
    #cropOverlayCanvas { display: block; max-width: 100%; max-height: 420px; }

    /* 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; }
    .panel-meta { font-size: 10px; color: var(--ink-light); }
    .preview-img-area { flex: 1; min-height: 280px; display: flex; align-items: center; justify-content: center; padding: 20px; background: repeating-conic-gradient(#E8EAED 0% 25%, #F8F9FA 0% 50%) 0 0 / 16px 16px; }
    #previewCanvas { max-width: 100%; max-height: 380px; display: block; box-shadow: 0 4px 20px rgba(0,0,0,0.12); }
    .panel-footer { padding: 10px 16px; border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; background: var(--bg); }

    /* Result strip */
    .result-strip { display: flex; align-items: stretch; border: 1px solid var(--border); background: var(--card); }
    .result-big { padding: 18px 24px; background: #FF0000; 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(255,255,255,0.55); text-transform: uppercase; }
    .result-big-num   { font-size: 20px; font-weight: 400; line-height: 1; white-space: nowrap; }
    .result-big-unit  { font-size: 10px; color: rgba(255,255,255,0.55); }
    .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); }

    /* Action bar */
    .convert-btn { font-size: 12px; letter-spacing: 0.15em; background: var(--blue); color: #fff; border: none; height: 48px; padding: 0 32px; cursor: pointer; transition: background 0.15s, transform 0.1s; display: flex; align-items: center; gap: 10px; }
    .convert-btn:hover { background: var(--blue-hover); }
    .convert-btn:active { transform: scale(0.98); }
    .convert-btn:disabled { opacity: 0.35; cursor: not-allowed; }
    .convert-btn:disabled:hover { background: var(--blue); }

    .is-converting .spinner { display: block; }
    .is-converting .btn-label { display: none; }