:root {
  --azul: #0b3d91;
  --azul-oscuro: #062a66;
  --azul-claro: #e8f0fe;
  --dorado: #f2b705;
  --gris: #4a5568;
  --gris-claro: #f7f9fc;
  --texto: #1a202c;
  --blanco: #ffffff;
  --radio: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--texto);
  line-height: 1.6;
  background: var(--blanco);
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* Header */
header {
  position: sticky; top: 0; z-index: 100;
  background: var(--blanco);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; max-width: 1140px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.3rem; color: var(--azul); }
.logo-mark { width: 40px; height: 40px; border-radius: 10px; background: linear-gradient(135deg, var(--azul), var(--azul-oscuro)); color: var(--blanco); display: flex; align-items: center; justify-content: center; font-weight: 900; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a { font-weight: 600; color: var(--gris); font-size: 0.95rem; transition: color .2s; }
.nav-links a:hover { color: var(--azul); }
.nav-cta { background: var(--azul); color: var(--blanco); padding: 10px 22px; border-radius: 8px; font-weight: 700; font-size: 0.9rem; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--azul); cursor: pointer; }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--azul) 0%, var(--azul-oscuro) 100%);
  color: var(--blanco);
  padding: 90px 24px 100px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -10%; top: -20%; width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(242,183,5,0.18) 0%, transparent 70%);
}
.hero-inner { max-width: 1140px; margin: 0 auto; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items: center; position: relative; }
.badge-generico { display: inline-block; background: rgba(242,183,5,0.2); border: 1px solid var(--dorado); color: var(--dorado); padding: 5px 14px; border-radius: 999px; font-size: 0.78rem; font-weight: 700; margin-bottom: 18px; letter-spacing: .3px; }
.hero h1 { font-size: 2.6rem; font-weight: 800; margin-bottom: 18px; line-height: 1.15; }
.hero p { font-size: 1.05rem; color: rgba(255,255,255,0.85); margin-bottom: 28px; max-width: 480px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 14px 28px; border-radius: 8px; font-weight: 700; font-size: 0.95rem; cursor: pointer; border: none; transition: transform .15s, box-shadow .15s; }
.btn-dorado { background: var(--dorado); color: var(--azul-oscuro); }
.btn-dorado:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(242,183,5,0.35); }
.btn-outline { background: transparent; color: var(--blanco); border: 2px solid rgba(255,255,255,0.5); }
.btn-outline:hover { border-color: var(--blanco); }
.btn-disabled { opacity: .55; cursor: not-allowed; position: relative; }
.hero-card { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.18); border-radius: var(--radio); padding: 28px; backdrop-filter: blur(6px); }
.hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.stat-num { font-size: 1.8rem; font-weight: 800; color: var(--dorado); }
.stat-label { font-size: 0.82rem; color: rgba(255,255,255,0.75); }

/* Secciones generales */
section { padding: 80px 0; }
.section-tag { color: var(--azul); font-weight: 700; font-size: 0.8rem; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 10px; }
.section-title { font-size: 2rem; font-weight: 800; margin-bottom: 16px; }
.section-desc { color: var(--gris); max-width: 640px; margin-bottom: 40px; }
.bg-claro { background: var(--gris-claro); }

/* Nosotros */
.nosotros-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.valores { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 20px; }
.valor-card { background: var(--blanco); border: 1px solid #e5e9f0; border-radius: var(--radio); padding: 20px; }
.valor-card .icono { font-size: 1.6rem; margin-bottom: 8px; }
.valor-card h4 { font-size: 1rem; margin-bottom: 4px; }
.valor-card p { font-size: 0.87rem; color: var(--gris); }

/* Programas */
.programas-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.programa-card { background: var(--blanco); border: 1px solid #e5e9f0; border-radius: var(--radio); overflow: hidden; transition: transform .2s, box-shadow .2s; }
.programa-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(11,61,145,0.12); }
.programa-top { height: 8px; background: linear-gradient(90deg, var(--azul), var(--dorado)); }
.programa-body { padding: 24px; }
.programa-icono { width: 48px; height: 48px; border-radius: 10px; background: var(--azul-claro); color: var(--azul); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 14px; }
.programa-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.programa-card p { font-size: 0.87rem; color: var(--gris); margin-bottom: 14px; }
.programa-meta { display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--azul); font-weight: 700; border-top: 1px solid #eef1f6; padding-top: 12px; }

/* Admisiones / formulario */
.admisiones-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 50px; align-items: start; }
.pasos { list-style: none; margin-top: 24px; }
.pasos li { display: flex; gap: 16px; margin-bottom: 22px; }
.paso-num { width: 34px; height: 34px; flex-shrink: 0; border-radius: 50%; background: var(--azul); color: var(--blanco); display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 0.9rem; }
.paso-texto h4 { font-size: 0.98rem; margin-bottom: 2px; }
.paso-texto p { font-size: 0.85rem; color: var(--gris); }

.form-card { background: var(--blanco); border: 1px solid #e5e9f0; border-radius: var(--radio); padding: 32px; box-shadow: 0 10px 30px rgba(0,0,0,0.06); }
.form-card h3 { margin-bottom: 4px; }
.form-card .sub { color: var(--gris); font-size: 0.88rem; margin-bottom: 22px; }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 0.85rem; font-weight: 700; margin-bottom: 6px; color: var(--texto); }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; padding: 12px 14px; border: 1px solid #d7dce5; border-radius: 8px; font-size: 0.92rem; font-family: inherit;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus { outline: none; border-color: var(--azul); }
.form-card button { width: 100%; margin-top: 6px; }
.form-msg { margin-top: 14px; padding: 12px 14px; border-radius: 8px; font-size: 0.88rem; font-weight: 600; }
.form-msg.ok { background: #e6f7ed; color: #1a7a41; border: 1px solid #b7ecc9; }
.form-msg.error { background: #fdeceb; color: #b3261e; border: 1px solid #f6c6c2; }

/* Blog placeholder */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.blog-card { background: var(--blanco); border: 1px dashed #cbd3e0; border-radius: var(--radio); padding: 28px; text-align: center; color: var(--gris); }
.blog-card .icono { font-size: 1.8rem; margin-bottom: 10px; }

/* Contacto */
.contacto-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contacto-item { display: flex; gap: 14px; margin-bottom: 22px; }
.contacto-icono { width: 44px; height: 44px; border-radius: 10px; background: var(--azul-claro); color: var(--azul); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
.mapa-placeholder { background: var(--azul-claro); border-radius: var(--radio); height: 100%; min-height: 260px; display: flex; align-items: center; justify-content: center; color: var(--azul); font-weight: 700; text-align: center; padding: 20px; }

/* Footer */
footer { background: var(--azul-oscuro); color: rgba(255,255,255,0.8); padding: 50px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
footer h4 { color: var(--blanco); margin-bottom: 14px; font-size: 0.95rem; }
footer .logo { color: var(--blanco); margin-bottom: 12px; }
footer p { font-size: 0.88rem; }
footer ul { list-style: none; font-size: 0.88rem; }
footer li { margin-bottom: 8px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 20px; text-align: center; font-size: 0.8rem; }

/* Tooltip aula virtual */
.tooltip { position: relative; }
.tooltip .tooltip-text {
  visibility: hidden; opacity: 0; transition: opacity .2s;
  position: absolute; bottom: 120%; left: 50%; transform: translateX(-50%);
  background: var(--azul-oscuro); color: var(--blanco); padding: 6px 12px; border-radius: 6px; font-size: 0.78rem; white-space: nowrap;
}
.tooltip:hover .tooltip-text { visibility: visible; opacity: 1; }

@media (max-width: 900px) {
  .hero-inner, .nosotros-grid, .admisiones-grid, .contacto-grid { grid-template-columns: 1fr; }
  .programas-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 600px) {
  .programas-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2rem; }
  .valores { grid-template-columns: 1fr; }
}