/* ============================================
   cursos.css – versión corregida y pulida
   NO cambia diseño visual
   ============================================ */

:root {
  --banner: #1D4567;
  --btn: #3984C6;
  --ice: #F6F8FA;
  --text: #222831;
  --muted: #6b7280;
  --card-bg: #f3f6f9;
  --border: #e5e7eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
}

body {
  background: var(--ice);
  font-family: 'Poppins', sans-serif;
  margin: 0;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 30px 20px;
}

/* ============================================
   TÍTULO
   ============================================ */

.section-title {
  text-align: center;
  font-size: 2.3rem;
  color: var(--banner);
  margin: 20px 0 10px;
  position: relative;
  padding-bottom: 15px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--btn);
  border-radius: 2px;
}

/* Intro */
.intro {
  text-align: center;
  color: var(--muted);
  max-width: 900px;
  margin: 0 auto 40px;
  font-size: 1.15rem;
  line-height: 1.6;
  padding: 0 20px;
}

/* ============================================
   BOTONES DE CATEGORÍA
   ============================================ */

.category-buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 30px auto 40px;
  flex-wrap: wrap;
  padding: 20px;
  background: white;
  border-radius: 16px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  max-width: 900px;
}

.category-btn {
  padding: 12px 28px;
  border: 2px solid var(--border);
  background: white;
  color: var(--muted);
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.category-btn:hover {
  border-color: var(--btn);
  color: var(--btn);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(57, 132, 198, 0.15);
}

.category-btn.active {
  background: var(--btn);
  color: white;
  border-color: var(--btn);
  font-weight: 700;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(57, 132, 198, 0.25);
}

.category-btn.active::after {
  content: '';
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: white;
  border-radius: 2px;
}

/* ============================================
   BUSCADOR
   ============================================ */

.controls-row {
  display: flex;
  justify-content: center;
  margin-bottom: 40px;
}

.search-container {
  width: 100%;
  max-width: 600px;
  position: relative;
}

.search-container::before {
  content: '🔍';
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
}

.search-container input {
  width: 100%;
  padding: 14px 20px 14px 50px;
  border: 2px solid var(--border);
  border-radius: 50px;
  font-size: 1rem;
  background: white;
  transition: 0.3s;
}

.search-container input:focus {
  outline: none;
  border-color: var(--btn);
  box-shadow: 0 0 0 3px rgba(57, 132, 198, 0.1);
}

/* ============================================
   GRID DE CURSOS
   ============================================ */

.courses-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}

/* ============================================
   CARD - MODIFICADO PARA ALTURA UNIFORME
   ============================================ */

.course-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: 0.3s;
  display: flex;
  flex-direction: column;
  height: 100%; /* Asegura altura completa en grid */
}

.course-card:hover {
  transform: translateY(-8px);
  border-color: var(--btn);
  box-shadow: 0 15px 30px rgba(57,132,198,0.15);
}

/* Imagen */
.course-image {
  height: 200px;
  background: linear-gradient(135deg, #e9f1fa, #d4e3f7);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  flex-shrink: 0; /* Evita que la imagen se reduzca */
}

.course-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.5s ease;
}

.course-card:hover .course-image img {
  transform: scale(1.08);
}

/* Contenido - MODIFICADO PARA BOTONES ALINEADOS */
.course-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1; /* Ocupa todo el espacio disponible */
  min-height: 3.4rem;
}

.category-badge {
  align-self: flex-start;
  padding: 5px 12px;
  background: var(--ice);
  color: var(--banner);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 12px;
  border: 1px solid rgba(57,132,198,0.2);
}

.course-body h3 {
  font-size: 1.15rem;
  color: var(--banner);
  margin: 0 0 12px;
  line-height: 1.4;
  min-height: 3.4em;
  flex-grow: 1; /* El título ocupa espacio disponible */
}

.course-body p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 20px;
  min-height: 4.5em;
  flex-grow: 2; /* La descripción ocupa más espacio */
}

/* Botón – MISMO DISEÑO - MODIFICADO PARA ALINEACIÓN */
.download-btn {
  display: block;
  width: 100%;
  padding: 12px;
  background: var(--btn);
  color: white !important;
  text-align: center;
  text-decoration: none !important;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
  margin-top: auto; /* Empuja el botón al fondo */
  border: none;
  cursor: pointer;
  font-family: 'Poppins', sans-serif;
  flex-shrink: 0; /* Evita que el botón se reduzca */
  min-height: 44px; /* Altura mínima consistente */
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-btn:hover {
  background: #2a6495;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(57, 132, 198, 0.3);
}

/* ============================================
   RESPONSIVE - CON FIX PARA BOTONES UNIFORMES
   ============================================ */

@media (max-width: 1200px) {
  .courses-container {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 992px) {
  .courses-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .courses-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .course-image {
    height: 160px;
  }

  .course-body {
    padding: 16px;
  }

  .course-body h3 {
    font-size: 1rem;
    min-height: 2.8em; /* Ajustado para mobile */
  }

  .course-body p {
    font-size: 0.85rem;
    min-height: 3.5em; /* Ajustado para mobile */
  }

  .download-btn {
    padding: 10px;
    min-height: 40px;
    font-size: 0.9rem;
  }
  
  /* FIX: Asegurar altura uniforme en mobile */
  .course-card {
    min-height: 380px; /* Altura mínima para consistencia */
  }
}

@media (max-width: 480px) {
  .courses-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .course-body p {
    display: none;
    min-height: 0;
    flex-grow: 0; /* Reset cuando no hay descripción */
  }

  .course-body h3 {
    min-height: 2.8em;
    flex-grow: 2; /* Más espacio para el título cuando no hay descripción */
  }
  
  .course-card {
    min-height: 320px; /* Menor altura sin descripción */
  }
  
  .download-btn {
    padding: 8px 12px;
    min-height: 38px;
    font-size: 0.85rem;
  }
}