:root{--bg:#f6f8fa;--card:#ffffff;--text:#0f172a;--muted:#64748b;--border:#e2e8f0;--primary:#2563eb;--primary-hover:#1d4ed8;--success:#16a34a;--error:#dc2626}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.container{max-width:960px;margin:0 auto;padding:2rem 1.5rem}h1,h2,h3{line-height:1.25}h1{font-size:1.8rem;margin-bottom:.5rem}h2{font-size:1.25rem;margin-bottom:.75rem}p.subtle{color:var(--muted);font-size:.95rem}.card{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:1.25rem;margin-bottom:1.25rem}button{font:inherit;background:var(--primary);color:white;border:none;border-radius:6px;padding:.6rem 1rem;cursor:pointer}button:hover{background:var(--primary-hover)}button:disabled{opacity:.6;cursor:not-allowed}input[type=file]{display:block;margin-top:.5rem}input[type=file]::-webkit-file-upload-button{margin-right:1rem;padding:.4rem .75rem;border-radius:6px;border:1px solid var(--border);background:#f8fafc;cursor:pointer}input[type=file]::file-selector-button{margin-right:1rem;padding:.4rem .75rem;border-radius:6px;border:1px solid var(--border);background:#f8fafc;cursor:pointer}.badge{display:inline-block;padding:.25rem .6rem;border-radius:999px;font-size:.75rem;font-weight:600}.badge.success{background:#dcfce7;color:var(--success)}.badge.error{background:#fee2e2;color:var(--error)}pre{background:#0f172a;color:#e5e7eb;padding:1rem;border-radius:8px;overflow-x:auto;font-size:.85rem}table{width:100%;border-collapse:collapse;font-size:.9rem}td,th{padding:.6rem;border-bottom:1px solid var(--border);text-align:left}th{background:#f1f5f9;font-weight:600}