/* Mantenimiento - simple y responsivo */
:root{
  --bg: #0b1220;
  --card: rgba(255,255,255,.08);
  --border: rgba(255,255,255,.12);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.72);

  --accent: #58c49a;
  --accent-2: #2aa2ff;

  --shadow: 0 18px 50px rgba(0,0,0,.35);
  --radius: 18px;
  --max: 1120px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Helvetica Neue", Helvetica, sans-serif;
  background: radial-gradient(900px 420px at 15% 10%, rgba(88,196,154,.18), transparent 60%),
              radial-gradient(900px 420px at 85% 25%, rgba(42,162,255,.16), transparent 60%),
              var(--bg);
  color: var(--text);
}
a{ color: inherit; text-decoration:none; }
img{ max-width:100%; display:block; }

.container{ width:min(var(--max), calc(100% - 32px)); margin:0 auto; }

.topbar{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,18,32,.70);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 14px 0;
  gap: 14px;
}
.brand{
  display:flex;
  align-items:center;
  gap: 12px;
}
.brand-mark{
  width: 44px;
  height: 44px;
  border-radius: 14px;
  object-fit: contain;
  background: rgba(255,255,255,.08);
  border: 1px solid var(--border);
}
.brand-text strong{
  display:block;
  letter-spacing: .6px;
}
.brand-text span{
  display:block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.pill{
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.06);
  font-weight: 800;
  font-size: 13px;
}
.dot{
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(88,196,154,.12);
}

.hero{ padding: 28px 0 18px; }
.hero-grid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 14px;
  align-items:start;
}
@media (max-width: 920px){
  .hero-grid{ grid-template-columns: 1fr; }
}

.card{
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.hero-card{ padding: 22px; }
.hero-card h1{
  margin:0 0 10px;
  font-size: clamp(28px, 3.2vw, 42px);
  letter-spacing: .2px;
}
.hero-card p{
  margin:0 0 14px;
  color: var(--muted);
  line-height: 1.7;
}

.actions{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 14px 0 10px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.08);
  font-weight: 900;
  font-size: 14px;
  cursor:pointer;
  transition: transform .15s ease, background .15s ease;
}
.btn:hover{ transform: translateY(-1px); background: rgba(255,255,255,.12); }
.btn.primary{
  background: linear-gradient(135deg, rgba(88,196,154,.95), rgba(42,162,255,.85));
  border-color: rgba(255,255,255,.18);
}
.btn.small{ padding: 10px 12px; font-size: 13px; }

.note{
  margin-top: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px dashed rgba(255,255,255,.20);
  color: rgba(255,255,255,.78);
  background: rgba(255,255,255,.06);
  line-height: 1.55;
}

.contact-card{ padding: 18px; }
.contact-card h2{ margin: 0 0 12px; font-size: 18px; }
.contact-card h3{ margin: 16px 0 8px; font-size: 15px; color: rgba(255,255,255,.90); }

.kv{
  display:grid;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,.80);
}
.kv b{ color: rgba(255,255,255,.92); }
.kv a{ text-decoration: underline; text-underline-offset: 2px; }
hr{
  border:0;
  border-top: 1px solid rgba(255,255,255,.14);
  margin: 16px 0;
}
.bullets{
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
  color: rgba(255,255,255,.78);
}
.mini{
  margin: 12px 0 0;
  color: rgba(255,255,255,.70);
  font-size: 12.5px;
  line-height: 1.6;
}

.section{ padding: 22px 0 44px; }
.section-title{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap: 14px;
  margin: 16px 0 14px;
}
.section-title h2{ margin:0; font-size: 22px; }
.section-title p{ margin: 6px 0 0; color: var(--muted); font-size: 13px; line-height: 1.5; }

.grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}
.course{
  grid-column: span 4;
  border-radius: var(--radius);
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  overflow:hidden;
}
@media (max-width: 980px){ .course{ grid-column: span 6; } }
@media (max-width: 640px){ .course{ grid-column: span 12; } }

.media{
  position:relative;
  aspect-ratio: 16/10;
  background: rgba(255,255,255,.05);
}
.media img{
  width:100%;
  height:100%;
  object-fit: cover;
  opacity: .95;
}
.badge{
  position:absolute;
  top: 12px;
  left: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(11,18,32,.65);
  border: 1px solid rgba(255,255,255,.18);
  font-weight: 900;
  font-size: 12px;
}

.content{ padding: 12px 12px 14px; }
.content h3{ margin:0 0 6px; font-size: 16px; }
.meta{ margin:0 0 8px; color: rgba(255,255,255,.78); font-size: 13px; }
.content p{ margin:0; color: rgba(255,255,255,.72); line-height: 1.6; font-size: 13.5px; }

.cta-strip{
  margin-top: 16px;
  display:flex;
  gap: 14px;
  align-items:center;
  justify-content:space-between;
  padding: 16px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
}
.cta-strip h3{ margin:0 0 6px; font-size: 16px; }
.cta-strip p{ margin:0; color: rgba(255,255,255,.74); line-height: 1.5; font-size: 13.5px; }
@media (max-width: 820px){
  .cta-strip{ flex-direction: column; align-items: stretch; }
}

.footer{
  border-top: 1px solid rgba(255,255,255,.10);
  padding: 18px 0 26px;
  background: rgba(0,0,0,.12);
}
.foot{
  display:flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items:center;
  justify-content:space-between;
  color: rgba(255,255,255,.72);
  font-size: 13px;
}
.links{
  display:flex;
  gap: 10px;
  align-items:center;
}
.links span{ opacity: .5; }
.links a{ text-decoration: underline; text-underline-offset: 2px; }