*{box-sizing:border-box}html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:#fafafa;color:#222}#app{padding:2rem;max-width:1100px;margin:0 auto}.app__header h1{margin:0 0 .25rem;font-size:1.6rem}.app__header p{margin:0 0 2rem;color:#666}.app__grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:1.5rem;align-items:start}@media (max-width: 720px){.app__grid{grid-template-columns:1fr}}.drop-zone{border:2px dashed #aaa;border-radius:8px;padding:4rem 2rem;text-align:center;cursor:pointer;transition:border-color .15s,background .15s;white-space:pre-line;min-height:300px;display:grid;place-items:center}.drop-zone:hover,.drop-zone:focus{border-color:#4a90e2;background:#f0f7ff;outline:none}.drop-zone--hover{border-color:#4a90e2;background:#e8f1fb}.drop-zone--disabled{opacity:.6;cursor:default}.app__aside{background:#fff;border:1px solid #ddd;border-radius:8px;padding:1.25rem}.status p{margin:0 0 .5rem}.status__line{color:#666}.stats-panel__file{font-weight:600;margin-bottom:.5rem}.stats-panel__list{margin:.5rem 0 0;display:grid;grid-template-columns:max-content 1fr;gap:.4rem 1rem}.stats-panel__list dt{color:#666}.stats-panel__list dd{margin:0;font-variant-numeric:tabular-nums}.error-panel{background:#fff4f4;border:1px solid #f4c4c4;border-radius:8px;padding:1.5rem}.error-panel__message{margin:0 0 1rem;color:#b03a3a}.app__reset,.error-panel__dismiss{margin-top:1rem;padding:.5rem 1rem;border:1px solid #aaa;background:#fff;border-radius:6px;cursor:pointer;font-size:.95rem}.app__reset:hover,.error-panel__dismiss:hover{background:#f0f7ff;border-color:#4a90e2}.app__pack{margin-top:1rem;padding:.65rem 1.25rem;border:1px solid #4a90e2;background:#4a90e2;color:#fff;border-radius:6px;cursor:pointer;font-size:1rem;font-weight:600;width:100%}.app__pack:hover{background:#357ab8;border-color:#357ab8}