:root{color-scheme:light;--bg: #f4f6f9;--panel: #ffffff;--text: #1a1d21;--muted: #5c6570;--accent: #1a73e8;--accent-hover: #1557b0;--border: #d8dee6;--err: #c5221f;--output-bg: #f8f9fb;font-family:SF Pro Text,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-height:100vh}#app{max-width:52rem;margin:0 auto;padding:2rem 1.25rem 3rem}.header h1{font-size:1.5rem;font-weight:600;margin:0;letter-spacing:-.02em;color:var(--text)}.panel{margin-top:1.5rem;padding:1.25rem 1.25rem 1.35rem;background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:0 1px 2px #0f172a0a}.row{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center}.file{display:flex;flex-direction:column;gap:.35rem;font-size:.9rem}.file-label{color:var(--muted)}input[type=file]{font-size:.85rem;max-width:100%}.hint{margin:1rem 0 0;font-size:.85rem;color:var(--muted)}.hint strong{color:var(--text);font-weight:500}.actions{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1rem}.btn{font:inherit;font-size:.9rem;padding:.5rem 1rem;border-radius:8px;border:1px solid var(--border);background:var(--panel);color:var(--text);cursor:pointer}.btn:hover:not(:disabled):not(.primary){border-color:var(--muted);background:var(--bg)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--accent);border-color:transparent;color:#fff;font-weight:500}.btn.primary:hover:not(:disabled){background:var(--accent-hover);border-color:transparent}.output-wrap{margin-top:1rem}.out-label{display:block;font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:.5rem}.output{margin:0;padding:1rem 1.1rem;background:var(--output-bg);border:1px solid var(--border);border-radius:8px;font-size:.88rem;line-height:1.45;white-space:pre-wrap;word-break:break-word;min-height:8rem;color:var(--text)}.err{margin:.75rem 0 0;font-size:.85rem;color:var(--err);min-height:1.25rem}