:root{--bg:#EDF1F8;--card:#fff;--ink:#0F1B33;--mut:#4A5A78;--accent:#2457F5;--line:#DDE4F0;--nav:#0E1F45}
@media (prefers-color-scheme:dark){:root{--bg:#0A1430;--card:#12204A;--ink:#EAF0FF;--mut:#B5C3E4;--accent:#8FB0FF;--line:#223463;--nav:#081027}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Plus Jakarta Sans',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;line-height:1.7;font-size:16px}
header.top{background:var(--nav);color:#fff;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
header.top a{color:#fff;text-decoration:none}
.brand{font-size:24px;font-weight:800;letter-spacing:-.02em}
.brand span{color:#8FB0FF}
header.top nav{display:flex;gap:14px;flex-wrap:wrap;font-size:14px;font-weight:600}
header.top nav a{opacity:.9}
header.top nav a:hover,header.top nav a[aria-current]{opacity:1;text-decoration:underline}
main{max-width:820px;margin:28px auto;padding:0 16px}
article{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px clamp(18px,4vw,40px)}
h1{font-size:clamp(26px,5vw,34px);line-height:1.2;margin:0 0 6px;letter-spacing:-.02em}
h2{font-size:20px;margin:30px 0 8px}
p,li{color:var(--ink)}
.mut{color:var(--mut);font-size:14px}
ul{padding-left:22px}
a{color:var(--accent)}
.note{padding:12px 14px;border-radius:12px;background:rgba(36,87,245,.08);border:1px solid var(--line);font-size:14.5px}
table{border-collapse:collapse;width:100%;font-size:14.5px;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:rgba(36,87,245,.08)}
label{display:block;font-weight:700;font-size:14px;margin:14px 0 4px}
input,select,textarea{width:100%;font:inherit;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
textarea{min-height:140px;resize:vertical}
button.cta,a.cta{display:inline-block;margin-top:16px;padding:12px 22px;border-radius:12px;border:none;background:var(--accent);color:#fff;font:700 15px inherit;font-family:inherit;cursor:pointer;text-decoration:none}
@media (prefers-color-scheme:dark){button.cta,a.cta{color:#0A1430}}
footer.bot{max-width:820px;margin:0 auto 32px;padding:0 16px;text-align:center;font-size:13.5px;color:var(--mut)}
footer.bot a{color:var(--mut);margin:0 8px;display:inline-block}
:focus-visible{outline:2px solid #8FB0FF;outline-offset:2px}

/* ========== RESPONSIVE · Mobile First ========== */
html,body{max-width:100%;overflow-x:hidden}
img,video,iframe{max-width:100%}
article{overflow-wrap:anywhere}
input,select,textarea{font-size:16px} /* evita el zoom automático de iOS */
button.cta,a.cta{min-height:48px}

/* Tablet y móvil grande */
@media (max-width:768px){
  header.top{padding:12px 14px;flex-direction:column;align-items:flex-start;gap:8px}
  header.top nav{width:100%;flex-wrap:nowrap;overflow-x:auto;gap:4px;padding-bottom:4px;-webkit-overflow-scrolling:touch;scrollbar-width:thin}
  header.top nav a{flex:none;display:inline-flex;align-items:center;min-height:44px;padding:0 10px;white-space:nowrap}
  main{margin:16px auto;padding:0 12px}
  article{padding:22px clamp(16px,4vw,28px);border-radius:16px}
  h2{font-size:19px;margin:24px 0 8px}
  footer.bot{padding:0 12px;margin-bottom:24px}
  footer.bot a{margin:0 6px;padding:10px 0}
}

/* Móvil */
@media (max-width:480px){
  body{font-size:15.5px}
  main{margin:10px auto;padding:0 8px}
  article{padding:18px 14px;border-radius:14px}
  h1{font-size:24px}
  h2{font-size:18px}
  input,select,textarea{min-height:48px}
  textarea{min-height:140px}
  button.cta,a.cta{display:block;width:100%;text-align:center}
  th,td{padding:8px}
  footer.bot{font-size:13px}
}