:root{--bg: #faf9f7;--surface: #ffffff;--text: #22201d;--text-muted: #6b6660;--accent: #d97757;--accent-hover: #c2653f;--border: #e6e2dc;--success: #3a8a5c;--error: #c0392b;--error-bg: #fdf0ee;--radius: 14px;color-scheme:light}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}#app{max-width:640px;margin:0 auto;padding:2rem 1.25rem 3rem;min-height:100dvh;display:flex;flex-direction:column}.page-header{text-align:center;margin-bottom:2rem}.page-header h1{font-size:2rem;margin:0 0 .5rem;letter-spacing:-.02em}.tagline{color:var(--text-muted);font-size:.95rem;margin:0}main{flex:1}.drop-zone{border:2px dashed var(--border);border-radius:var(--radius);background:var(--surface);padding:2.5rem 1.5rem;text-align:center;cursor:pointer;transition:border-color .15s ease,background .15s ease;outline:none}.drop-zone:hover,.drop-zone:focus-visible{border-color:var(--accent)}.drop-zone.drag-over{border-color:var(--accent);background:#fdf3ee}.drop-zone-icon{font-size:2.5rem;margin-bottom:.75rem}.drop-zone-text{margin:0;font-size:1.05rem;color:var(--text)}.drop-zone-text-desktop{display:inline}.drop-zone-link{color:var(--accent);font-weight:600;margin-left:.35em}@media (hover: none){.drop-zone-text-desktop{display:none}}.file-list{list-style:none;margin:1.5rem 0 0;padding:0;display:flex;flex-direction:column;gap:.6rem}.file-item{display:flex;align-items:center;gap:.75rem;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:.6rem .75rem}.file-thumb{flex:none;width:48px;height:48px;border-radius:8px;background:var(--bg);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:1.3rem;background-size:cover;background-position:center}.file-info{flex:1;min-width:0}.file-name{font-size:.92rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-status{font-size:.82rem;color:var(--text-muted)}.file-item.status-done .file-status{color:var(--success)}.file-item.status-error .file-status{color:var(--error)}.file-error-msg{font-size:.8rem;color:var(--error);background:var(--error-bg);border-radius:6px;padding:.25rem .5rem;margin-top:.3rem}.file-actions{flex:none}.file-download-link{font-size:.85rem;font-weight:600;color:var(--accent);text-decoration:none;border:1px solid var(--accent);border-radius:8px;padding:.3rem .6rem;white-space:nowrap}.file-download-link:hover{background:var(--accent);color:#fff}.file-remove-btn{flex:none;background:none;border:none;color:var(--text-muted);font-size:1rem;cursor:pointer;padding:.25rem .4rem;line-height:1;border-radius:6px}.file-remove-btn:hover{color:var(--error);background:var(--error-bg)}.actions{margin-top:1.5rem;display:flex;gap:.75rem}.convert-btn{flex:1;background:var(--accent);color:#fff;border:none;border-radius:10px;padding:.8rem 1rem;font-size:1rem;font-weight:600;cursor:pointer;transition:background .15s ease}.convert-btn:hover:not(:disabled){background:var(--accent-hover)}.convert-btn:disabled{opacity:.6;cursor:not-allowed}.clear-btn{background:none;border:1px solid var(--border);color:var(--text-muted);border-radius:10px;padding:.8rem 1rem;font-size:.95rem;cursor:pointer}.clear-btn:hover:not(:disabled){border-color:var(--error);color:var(--error)}.clear-btn:disabled{opacity:.6;cursor:not-allowed}.top-level-error{margin-top:1.25rem;background:var(--error-bg);color:var(--error);border-radius:10px;padding:.7rem .9rem;font-size:.9rem;text-align:center}.page-footer{text-align:center;margin-top:3rem;color:var(--text-muted);font-size:.8rem}@media (prefers-color-scheme: dark){:root{--bg: #1b1a18;--surface: #242320;--text: #f1efec;--text-muted: #a39d94;--border: #38352f;--error-bg: #3a201c}}