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

body {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-fondo, #f5f7fa);
  color: var(--color-texto, #1f2937);
  line-height: 1.5;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  background: var(--color-primario, #2563eb);
  padding: 18px 0;
}
.site-header .logo {
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
}

/* Carrusel */
.carrusel {
  position: relative;
  max-width: 100%;
  overflow: hidden;
  background: #000;
}
.carrusel-track {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 5;
  min-height: 180px;
}
.carrusel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}
.carrusel-slide.activo {
  opacity: 1;
  pointer-events: auto;
}
.carrusel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.carrusel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.4);
  color: #fff;
  border: none;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 1.1rem;
  border-radius: 4px;
}
.carrusel-btn.prev { left: 12px; }
.carrusel-btn.next { right: 12px; }
.carrusel-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
}
.dot.activo { background: #fff; }

/* Sección de cursos */
.section-title {
  margin: 40px 0 20px;
  font-size: 1.6rem;
}
.sin-contenido {
  padding: 40px 0;
  color: #6b7280;
}
.cursos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) {
  .cursos-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .cursos-grid { grid-template-columns: 1fr; }
}
.curso-card {
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  display: flex;
  flex-direction: column;
}
.curso-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.curso-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.curso-info {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.curso-info h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.curso-info p {
  color: #6b7280;
  font-size: 0.92rem;
  flex: 1;
  margin-bottom: 14px;
}
.btn-detalle {
  align-self: flex-start;
  background: var(--color-primario, #2563eb);
  color: #fff;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.9rem;
}

.ver-mas-wrap {
  text-align: center;
  margin: 40px 0 60px;
}
.btn-ver-mas {
  display: inline-block;
  border: 2px solid var(--color-primario, #2563eb);
  color: var(--color-primario, #2563eb);
  text-decoration: none;
  padding: 10px 26px;
  border-radius: 8px;
  font-weight: 600;
}
.btn-ver-mas:hover {
  background: var(--color-primario, #2563eb);
  color: #fff;
}

/* Footer */
.site-footer {
  background: #111827;
  color: #9ca3af;
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
}

/* Admin */
.admin-body {
  background: #f3f4f6;
  min-height: 100vh;
}
.admin-nav {
  background: #111827;
  padding: 14px 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
.admin-nav > div {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 16px;
}
.admin-nav a {
  color: #e5e7eb;
  text-decoration: none;
  font-size: 0.92rem;
}
.admin-nav a:hover { color: #fff; }
.admin-nav .logo-admin { color: #fff; font-weight: 700; }
.admin-container {
  max-width: 1000px;
  margin: 30px auto;
  padding: 0 20px;
}

/* Tablas admin: scroll horizontal en pantallas chicas para no romper el layout */
.tabla-admin-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.tabla-admin {
  min-width: 560px;
}
.admin-card {
  background: #fff;
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.admin-card h2 {
  margin-bottom: 18px;
  font-size: 1.2rem;
}
.form-row {
  margin-bottom: 14px;
}
.form-row label {
  display: block;
  margin-bottom: 5px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #374151;
}
.form-row input[type=text],
.form-row input[type=number],
.form-row input[type=password],
.form-row input[type=color],
.form-row textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 0.92rem;
}
.form-row textarea { resize: vertical; min-height: 70px; }
.btn {
  display: inline-block;
  background: #2563eb;
  color: #fff;
  border: none;
  padding: 9px 18px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.92rem;
  text-decoration: none;
}
.btn.btn-danger { background: #dc2626; }
.btn.btn-secondary { background: #6b7280; }
.tabla-admin {
  width: 100%;
  border-collapse: collapse;
}
.tabla-admin th, .tabla-admin td {
  padding: 10px;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
  font-size: 0.9rem;
  vertical-align: middle;
}
.tabla-admin img {
  width: 60px;
  height: 40px;
  object-fit: cover;
  border-radius: 4px;
}
.alerta {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 18px;
  font-size: 0.9rem;
}
.alerta-exito { background: #d1fae5; color: #065f46; }
.alerta-error { background: #fee2e2; color: #991b1b; }
.login-box {
  max-width: 360px;
  margin: 90px auto;
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.login-box h1 { margin-bottom: 20px; font-size: 1.3rem; }

/* Responsive: admin en pantallas medianas/pequeñas */
@media (max-width: 768px) {
  .admin-nav {
    padding: 12px 16px;
  }
  .admin-container {
    margin: 18px auto;
    padding: 0 14px;
  }
  .admin-card {
    padding: 16px;
  }
  .login-box {
    margin: 40px auto;
    max-width: 92%;
    padding: 22px;
  }
}

@media (max-width: 480px) {
  .admin-nav {
    justify-content: center;
    text-align: center;
  }
  .admin-nav > div {
    justify-content: center;
  }
  .admin-card h2 {
    font-size: 1.05rem;
  }
}