/* Importación de tipografía moderna */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');

/* Reset y variables de color */
:root {
  --primary-blue: #0f2b48;
  --accent-blue: #0284c7;
  --hover-blue: #38bdf8;
  --bg-gray: #f1f5f9;
  --card-bg: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg-gray);
  color: var(--text-main);
  line-height: 1.6;
}

/* Encabezado Principal (Hero Section) */
header {
  background: linear-gradient(135deg, rgba(15, 43, 72, 0.92), rgba(2, 44, 86, 0.88)),
              url('../img/foto4.jpg') center/cover no-repeat;
  color: white;
  padding: 40px 20px 30px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}

.logo img {
  height: 95px;
  width: auto;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.titulo {
  flex: 1;
  text-align: left;
}

.titulo h1 {
  margin: 0;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.25;
}

.titulo .subtitulo {
  margin: 8px 0 18px;
  font-size: 1.1rem;
  color: #e2e8f0;
  font-weight: 300;
}

/* Navegación */
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 15px;
}

nav a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  transition: all 0.2s ease;
}

nav a:hover, nav a.active {
  color: white;
  background: var(--accent-blue);
  transform: translateY(-1px);
}

/* Banner de imágenes */
.banner-wrapper {
  max-width: 1200px;
  margin: -20px auto 30px;
  padding: 0 20px;
}

.banner {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.banner-item {
  flex: 1;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  max-height: 160px;
}

.banner-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.banner-item:hover img {
  transform: scale(1.08);
}

/* Contenido Principal & Tarjetas */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.card-section {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 35px;
  margin-bottom: 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid #e2e8f0;
}

h2 {
  color: var(--primary-blue);
  font-size: 1.5rem;
  margin-top: 0;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background-color: var(--accent-blue);
  border-radius: 2px;
}

.intro-text {
  font-size: 1.05rem;
  color: #334155;
  margin: 0;
}

.intro-text a {
  color: var(--accent-blue);
  font-weight: 600;
  text-decoration: none;
}

.intro-text a:hover {
  text-decoration: underline;
}

/* Grid de Áreas Temáticas */
.areas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 10px;
}

.area-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.area-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--accent-blue);
  opacity: 0.6;
  transition: opacity 0.2s;
}

.area-card .num {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-blue);
  margin-bottom: 8px;
}

.area-card h3 {
  margin: 0;
  font-size: 0.98rem;
  color: var(--primary-blue);
  font-weight: 600;
  line-height: 1.4;
}

.area-card:hover {
  background: #ffffff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.area-card:hover::before {
  opacity: 1;
}

/* Seccion Auspiciantes */
.logos-auspiciantes {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 25px;
  flex-wrap: wrap;
  padding-top: 10px;
}

.logos-auspiciantes img {
  height: 55px;
  max-width: 180px;
  width: auto;
  object-fit: contain;
  filter: grayscale(10%);
  opacity: 0.88;
  transition: all 0.2s ease;
}

.logos-auspiciantes img:hover {
  filter: grayscale(0%);
  opacity: 1;
  transform: scale(1.06);
}

/* Footer Oscuro */
footer {
  background: var(--primary-blue);
  color: #94a3b8;
  text-align: center;
  padding: 35px 20px 20px;
  margin-top: 50px;
}

.logos-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 25px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.logos-footer img {
  height: 50px;
  max-width: 160px;
  width: auto;
  background: rgba(255, 255, 255, 0.95);
  padding: 6px 12px;
  border-radius: 6px;
  transition: opacity 0.2s;
}

.logos-footer img:hover {
  opacity: 0.85;
}

footer p {
  margin: 10px 0 0;
  font-size: 0.9rem;
  color: #cbd5e1;
}

/* Responsivo para celulares */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    text-align: center;
  }
  
  .titulo {
    text-align: center;
  }

  nav {
    justify-content: center;
  }

  .banner {
    flex-wrap: wrap;
  }

  .banner-item {
    min-width: 45%;
    max-height: 120px;
  }

  .card-section {
    padding: 20px;
  }
}