/* =============================================
   RESET Y BASE
   ============================================= */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth; /* navegación suave entre secciones */
}

body {
  background-color: #0a0a0a;
  color: #d4d4d4;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

/* =============================================
   BARRA DE NAVEGACIÓN
   ============================================= */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 0.5px solid #1f1f1f;
}

nav {
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.nav-nombre {
  font-size: 14px;
  font-weight: 500;
  color: #ffffff;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

nav ul li a {
  font-size: 13px;
  color: #666;
  transition: color 0.2s;
}

nav ul li a:hover {
  color: #ffffff;
}

/* =============================================
   SECCIÓN HÉROE
   ============================================= */
.hero {
  max-width: 1000px;
  margin: 0 auto;
  padding: 80px 24px 72px;
  border-bottom: 0.5px solid #1a1a1a;
}

.etiqueta {
  font-size: 12px;
  color: #4ade80;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 500;
  color: #ffffff;
  line-height: 1.1;
  margin-bottom: 10px;
}

.subtitulo {
  font-size: 16px;
  color: #555;
  margin-bottom: 24px;
}

.bio {
  font-size: 15px;
  color: #888;
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-botones {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-primario {
  background-color: #ffffff;
  color: #000000;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.2s;
}

.btn-primario:hover {
  background-color: #e5e5e5;
}

.btn-secundario {
  border: 0.5px solid #333;
  color: #aaa;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.2s, color 0.2s;
}

.btn-secundario:hover {
  border-color: #666;
  color: #fff;
}

/* =============================================
   SECCIONES GENERALES
   ============================================= */
.seccion {
  max-width: 1000px;
  margin: 0 auto;
  padding: 64px 24px;
  border-bottom: 0.5px solid #1a1a1a;
}

.fondo-alt {
  background-color: #0d0d0d;
  max-width: 100%;
}

.fondo-alt > * {
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.fondo-alt.seccion {
  padding-left: 0;
  padding-right: 0;
}

.fondo-alt.seccion h2,
.fondo-alt.seccion .descripcion-seccion,
.fondo-alt.seccion .tags-grid,
.fondo-alt.seccion .lista-links {
  padding-left: 24px;
  padding-right: 24px;
}

.seccion h2 {
  font-size: 11px;
  color: #4ade80;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.descripcion-seccion {
  font-size: 13px;
  color: #555;
  margin-bottom: 24px;
}

/* =============================================
   TARJETAS DE EDUCACIÓN
   ============================================= */
.tarjetas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.tarjeta {
  background-color: #111;
  border: 0.5px solid #1f1f1f;
  border-radius: 12px;
  padding: 24px;
  transition: border-color 0.2s;
}

.tarjeta:hover {
  border-color: #333;
}

.año {
  font-size: 11px;
  color: #4ade80;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 10px;
}

.tarjeta h3 {
  font-size: 16px;
  font-weight: 500;
  color: #e5e5e5;
  margin-bottom: 4px;
}

.tarjeta p {
  font-size: 13px;
  color: #666;
}

.detalle {
  margin-top: 10px;
  font-size: 12px !important;
  color: #444 !important;
  line-height: 1.6;
}

/* =============================================
   TAGS DE HABILIDADES
   ============================================= */
.tags-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.tag {
  background-color: #111;
  border: 0.5px solid #222;
  color: #777;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 13px;
  transition: border-color 0.2s, color 0.2s;
}

.tag:hover {
  border-color: #444;
  color: #ccc;
}

/* =============================================
   LISTA DE LINKS (profesores y compañeros)
   ============================================= */
.lista-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background-color: #111;
  border: 0.5px solid #1f1f1f;
  border-radius: 10px;
  padding: 14px 18px;
  transition: border-color 0.2s, background-color 0.2s;
}

.link-card:hover {
  border-color: #333;
  background-color: #161616;
}

.link-icono {
  font-size: 20px;
  flex-shrink: 0;
}

.link-card div {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.link-card strong {
  font-size: 14px;
  color: #d4d4d4;
  font-weight: 500;
}

.link-card span {
  font-size: 12px;
  color: #555;
}

.flecha {
  color: #333;
  font-size: 16px;
  transition: color 0.2s;
}

.link-card:hover .flecha {
  color: #666;
}

/* =============================================
   SECCIÓN CONTACTO
   ============================================= */
.contacto-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.contacto-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: #111;
  border: 0.5px solid #1f1f1f;
  border-radius: 10px;
  padding: 14px 20px;
  font-size: 14px;
  color: #888;
  transition: border-color 0.2s, color 0.2s;
}

.contacto-item:hover {
  border-color: #333;
  color: #e5e5e5;
}

/* =============================================
   PIE DE PÁGINA
   ============================================= */
footer {
  text-align: center;
  padding: 32px 24px;
  font-size: 12px;
  color: #333;
}

footer a {
  color: #444;
  transition: color 0.2s;
}

footer a:hover {
  color: #888;
}

/* =============================================
   RESPONSIVE (celular)
   ============================================= */
@media (max-width: 600px) {
  nav ul {
    gap: 14px;
  }
  nav ul li a {
    font-size: 11px;
  }
  .hero {
    padding: 48px 20px 48px;
  }
}