:root{
  /* Azul marino con superficies claras para el tablero. */
  --bg0:#E6EFFA;
  --bg1:#F5F9FF;
  --card:#F5F9FF;
  --border:#C5D4E8;
  --text:#0D1B31;
  --muted:#435773;

  --accent:#1758A4;
  --accentSoft:#DCEBFF;
  --accent2:#1758A4;

  --shadow: 0 10px 26px rgba(17,24,39,.10);
  --shadowHover: 0 16px 38px rgba(17,24,39,.14);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu;
  color:var(--text);
  background:
    radial-gradient(1000px 700px at 18% -10%, rgba(23,88,164,.10), transparent 60%),
    radial-gradient(900px 650px at 88% 0%, rgba(46,144,250,.06), transparent 55%),
    linear-gradient(180deg, var(--bg0), var(--bg1));
}

a{color:var(--accent2); text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1100px;margin:0 auto;padding:34px 18px 72px}

.nav{
  display:flex; justify-content:space-between; align-items:center;
  gap:16px; padding:10px 0 26px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight:800; letter-spacing:.2px;
}
.brandDot{
  width:12px;height:12px;border-radius:999px;
  background:linear-gradient(135deg, var(--accent), #69d9ff);
  box-shadow:0 0 0 4px rgba(23,88,164,.10);
}
.navlinks{display:flex; gap:14px; flex-wrap:wrap}
.navlinks a{
  color:var(--muted);
  padding:8px 10px;
  border-radius:10px;
  border:1px solid transparent;
}
.navlinks a:hover{
  color:var(--text);
  border-color:rgba(23,88,164,.20);
  text-decoration:none;
  background:rgba(220,235,255,.55);
}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:var(--shadow);
  padding:28px;
  position:relative;
}
/* Franja azul superior. */
.card::before{
  content:"";
  position:absolute;
  left:18px; right:18px; top:0;
  height:4px;
  border-radius:18px;
  background:linear-gradient(90deg, rgba(23,88,164,.65), rgba(23,88,164,.05));
}

.pill{
  display:inline-flex; align-items:center; gap:8px;
  padding:6px 10px; border-radius:999px;
  background:rgba(220,235,255,.55);
  border:1px solid rgba(23,88,164,.18);
  color:var(--muted);
  font-size:13px;
}

h1{margin:14px 0 8px;font-size:44px;letter-spacing:-.03em; line-height:1.05}
@media (min-width: 900px){h1{font-size:54px}}
h2{margin:0 0 10px}
p{color:var(--muted);line-height:1.7; font-size:16px}

/* Títulos sobre las superficies claras. */
h1, h2, h3{color:var(--text)}
.card h1{ }

.btn{
  display:inline-flex; align-items:center; gap:8px;
  margin-top:14px;
  padding:11px 14px;
  border-radius:12px;
  border:1px solid rgba(23,88,164,.25);
  background:rgba(220,235,255,.35);
  color:var(--text);
}
.btn:hover{background:rgba(220,235,255,.55);text-decoration:none}

.grid{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px; margin-top:22px}
@media (max-width:900px){.grid{grid-template-columns:1fr}}
.app{
  display:block;
  padding:18px;
  border-radius:16px;
  border:1px solid var(--border);
  background:rgba(238,245,255,.85);
  box-shadow: 0 2px 0 rgba(17,24,39,.02);
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease, background .12s ease;
}
.app:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadowHover);
  border-color: rgba(23,88,164,.20);
  background: rgba(220,235,255,.25);
  text-decoration:none;
}
.app h3{margin:0 0 6px;color:var(--text); font-size:18px}
.small{font-size:14px}

.formCard label{display:block;margin:10px 0;color:var(--muted)}
.formCard input[type="checkbox"]{transform:translateY(1px)}

.formCard .in{
  width:100%;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.92);
  color:var(--text);
  outline:none;
}
.formCard .in:focus{border-color:rgba(23,88,164,.30)}

.formCard select{
  padding:8px;
  border-radius:10px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.98);
  color:var(--text);
}

.row{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}

.footer{
  margin-top:20px;
  display:flex; gap:14px; flex-wrap:wrap;
  font-size:14px;
  color:var(--muted);
}
.footer a{color:var(--muted)}
.footer a:hover{color:var(--text);text-decoration:none}