:root{--bg:#f6f7f9;--card:#fff;--ink:#1c2230;--muted:#667085;--line:#e3e6eb;--accent:#1f5eff;--err:#b42318}
*{box-sizing:border-box}
body{margin:0;font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink)}
.top{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--card);border-bottom:1px solid var(--line)}
.top nav{display:flex;gap:14px;align-items:center}
.brand{font-weight:700;color:var(--ink);text-decoration:none}
a{color:var(--accent)}
main{max-width:720px;margin:0 auto;padding:16px}
h1{font-size:1.4rem;margin:.2em 0 .6em}h2{font-size:1.05rem;margin:.8em 0 .2em}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;margin:0 0 12px}
.card.off{opacity:.6}
.narrow{max-width:380px;margin:40px auto}
.muted{color:var(--muted);font-size:.9rem}
.error{color:var(--err);background:#fef3f2;border:1px solid #fecdca;border-radius:8px;padding:10px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.tile{display:flex;flex-direction:column;gap:4px;text-decoration:none;color:inherit}
.row{display:flex;justify-content:space-between;align-items:center}
.stack{display:flex;flex-direction:column;gap:12px}
label{display:flex;flex-direction:column;gap:4px;font-size:.92rem}
label.check{flex-direction:row;align-items:center;gap:8px}
input,select{font:inherit;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fff}
input[type=checkbox]{width:auto}
.btn{display:inline-block;padding:10px 16px;border-radius:8px;border:1px solid var(--line);background:#fff;color:var(--ink);text-decoration:none;font:inherit;cursor:pointer;text-align:center}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.block{display:block;margin:14px 0}
form.inline{display:inline}
button.link{background:none;border:0;color:var(--accent);font:inherit;cursor:pointer;padding:0}
textarea{font:inherit;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fff;width:100%}
.tabla{width:100%;border-collapse:collapse;margin:6px 0}.tabla td{padding:5px 0;border-bottom:1px solid var(--line)}.tabla td.num{text-align:right;font-variant-numeric:tabular-nums}
details summary{cursor:pointer;color:var(--accent)}