:root{--bg:#ffffff;--text:#111;--muted:#666;--primary:#111;--border:#e5e7eb}*{box-sizing:border-box}body{margin:0;font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Arial;background:var(--bg);color:var(--text)}.container{max-width:960px;margin:24px auto;padding:0 16px}.topbar{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border);padding:12px 16px;display:flex;justify-content:space-between;align-items:center;z-index:10}.brand{font-weight:700}.nav a{margin-left:12px;color:#111;text-decoration:none}.card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px;margin-top:16px}.grid{display:grid;gap:12px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.label{font-size:13px;color:var(--muted)}.input,select{width:100%;border:1px solid var(--border);border-radius:8px;padding:10px}.btn{background:var(--primary);color:#fff;border:0;border-radius:8px;padding:10px 14px;cursor:pointer}.btn:disabled{opacity:.6;cursor:not-allowed}.row{display:flex;gap:8px;align-items:center}.badge{display:inline-block;border:1px solid var(--border);background:#f8fafc;border-radius:999px;font-size:12px;padding:2px 8px}.error{color:#b00020}.success{color:#066e2c}.footer{padding:24px;text-align:center;color:#777;font-size:12px}