:root{--bg: #ffffff;--card: #ffffff;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--soft: #f9fafb;--danger: #fee2e2;--danger-border: #fecaca;--radius: 14px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}.container{max-width:980px;margin:40px auto;padding:0 18px}.header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.h-title{font-size:40px;font-weight:800;margin:0;letter-spacing:-.02em}.h-sub{margin-top:8px;color:var(--muted)}.pills{display:flex;align-items:center;gap:10px}.pill{padding:6px 10px;border:1px solid var(--border);border-radius:999px;background:var(--soft);font-size:13px}.btn{padding:8px 12px;border:1px solid var(--border);background:#fff;border-radius:10px;cursor:pointer}.btn:hover{background:var(--soft)}.btn:disabled{opacity:.5;cursor:not-allowed}.alert{margin-top:18px;padding:12px 14px;border:1px solid var(--danger-border);background:var(--danger);border-radius:var(--radius)}.tabs{margin-top:18px;display:flex;gap:10px}.tab{padding:8px 12px;border:1px solid var(--border);border-radius:12px;background:#fff;cursor:pointer}.tab.active{border-color:#111827;box-shadow:0 1px #0000000a}.tab:disabled{opacity:.45;cursor:not-allowed}.card{margin-top:18px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px}.card h3{margin:0 0 14px;font-size:18px}.grid{display:grid;grid-template-columns:140px 1fr;gap:12px;align-items:center}.input,.textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:14px}.textarea{min-height:90px;resize:vertical}.footer{margin-top:18px;color:var(--muted);font-size:12px}code{background:var(--soft);border:1px solid var(--border);padding:2px 6px;border-radius:8px}