/* css/cursos.css - Versión FINAL: Sin fondo negro, scroll solo dentro, body sin scroll */
:root {
  --celeste: #00c4ff;
  --celeste-claro: #e6f7ff;
  --celeste-oscuro: #00a8e6;
  --negro: #1a1a1a;
  --blanco: #ffffff;
  --gris: #f8f9fa;
  --gris-claro: #f1f3f5;
  --sombra-suave: 0 15px 35px rgba(0, 0, 0, 0.1);
  --sombra-elevada: 0 25px 50px rgba(0, 196, 255, 0.2);
  --transicion: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== OCULTAR SCROLL DEL BODY CUANDO HAY MODAL ===== */
body.modal-open,
body.submodal-open {
  overflow: hidden !important;
  height: 100vh;
  padding-right: 0 !important; /* Evita salto por scrollbar */
}

/* ===== MODAL PRINCIPAL (Bootstrap) ===== */
#cursosModal .modal-dialog {
  max-width: 1800px !important;
  width: 95vw;
  margin: 1rem auto;
  display: flex;
  align-items: center;
  min-height: calc(100vh - 2rem);
}

#cursosModal .modal-content {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--sombra-elevada);
  border: none;
  max-height: 92vh;
  overflow: hidden; /* Scroll solo dentro */
  display: flex;
  flex-direction: column;
}

#cursosModal .modal-body {
  padding: 3rem 3.5rem !important;
  flex: 1;
  overflow-y: auto; /* Scroll solo aquí */
  -webkit-overflow-scrolling: touch;
}

#cursosModal .modal-header {
  background: linear-gradient(135deg, var(--celeste), var(--celeste-oscuro));
  border-bottom: none;
  padding: 1.8rem 2.5rem;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

#cursosModal .modal-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,30 L100,100 L0,100 Z" fill="rgba(255,255,255,0.1)"/></svg>');
  background-size: cover;
  pointer-events: none;
}

#cursosModal .modal-title {
  font-weight: 700;
  font-size: 1.8rem;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

#cursosModal .btn-close-white {
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.3));
  opacity: 0.9;
}

#cursosModal .btn-close-white:hover {
  opacity: 1;
  transform: scale(1.1);
}

/* ===== GRID DE CURSOS ===== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2.5rem;
  padding: 0;
  background: linear-gradient(to bottom, var(--gris-claro), var(--gris));
  border-radius: 0 0 24px 24px;
}

/* ===== TARJETA DE CURSO ===== */
.course-card {
  background: white;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--sombra-suave);
  transition: var(--transicion);
  cursor: pointer;
  position: relative;
  border: 1px solid rgba(0, 196, 255, 0.1);
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(0,196,255,0.05), transparent);
  opacity: 0;
  transition: var(--transicion);
  pointer-events: none;
}

.course-card:hover::before { opacity: 1; }
.course-card:hover {
  transform: translateY(-16px) scale(1.04);
  box-shadow: var(--sombra-elevada);
  border-color: var(--celeste);
  z-index: 10;
}

.course-img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  transition: var(--transicion);
}

.course-card:hover .course-img { transform: scale(1.1); }

.course-info {
  padding: 1.6rem 1.4rem;
  text-align: center;
}

.course-info h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--negro);
  margin-bottom: 0.6rem;
}

.course-info p {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.5;
}

.course-card[data-popular="true"] .course-info::after {
  content: 'POPULAR';
  position: absolute;
  top: -10px; right: 15px;
  background: #ff6b6b;
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 50px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(255,107,107,0.3);
}

/* ===== SUBMODAL: SIN FONDO NEGRO, SOLO BLUR ===== */
.submodal {
  display: none;
  position: fixed;
  z-index: 5000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1); /* Fondo casi transparente */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow: hidden; /* No scroll aquí */
  animation: fadeIn 0.4s ease;
}

.submodal.show {
  display: flex !important;
}

.submodal-content {
  background: #fff;
  width: 95%;
  max-width: 1200px;
  max-height: 90vh;
  overflow-y: auto; /* Scroll solo dentro del contenido */
  -webkit-overflow-scrolling: touch;
  border-radius: 24px;
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(0, 196, 255, 0.15);
  animation: slideUp 0.4s ease;
  position: relative;
  margin: auto;
}

/* Botón cerrar */
.close-sub {
  position: absolute;
  top: 1.2rem;
  right: 1.8rem;
  font-size: 1.9rem;
  font-weight: bold;
  color: white;
  background: rgba(255, 255, 255, 0.25);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transicion);
  backdrop-filter: blur(4px);
  z-index: 5100;
  user-select: none;
}

.close-sub:hover {
  background: rgba(255, 255, 255, 0.4);
  transform: rotate(90deg) scale(1.1);
}

.submodal-header {
  background: linear-gradient(135deg, var(--celeste), var(--celeste-oscuro));
  color: white;
  padding: 1.8rem 2rem;
  text-align: center;
  position: relative;
  flex-shrink: 0;
}

.submodal-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.submodal-body {
  padding: 2.2rem;
  background: var(--blanco);
}

/* Scroll solo dentro del submodal */
.submodal-body::-webkit-scrollbar,
#cursosModal .modal-body::-webkit-scrollbar {
  width: 10px;
}

.submodal-body::-webkit-scrollbar-thumb,
#cursosModal .modal-body::-webkit-scrollbar-thumb {
  background: var(--celeste);
  border-radius: 6px;
}

.submodal-body::-webkit-scrollbar-thumb:hover,
#cursosModal .modal-body::-webkit-scrollbar-thumb:hover {
  background: var(--celeste-oscuro);
}

.detail-img {
  width: 100%;
  height: 350px;
  object-fit: cover;
  border-radius: 16px;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
  border: 1px solid rgba(0,0,0,0.05);
}

.submodal-body p {
  font-size: 1.1rem;
  color: #444;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.info-grid {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.9rem 1.4rem;
  margin: 1.5rem 0;
  font-size: 0.98rem;
  background: var(--gris-claro);
  padding: 1.2rem;
  border-radius: 14px;
  border-left: 4px solid var(--celeste);
}

.info-label {
  font-weight: 700;
  color: var(--celeste-oscuro);
}

.info-label::after {
  content: ':';
  margin-right: 0.5rem;
}

.info-value {
  color: var(--negro);
  font-weight: 500;
}

.btn-enroll {
  background: linear-gradient(135deg, var(--celeste), var(--celeste-oscuro));
  color: white;
  border: none;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  margin-top: 1.5rem;
  transition: var(--transicion);
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  box-shadow: 0 8px 20px rgba(0, 196, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.btn-enroll::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: 0.6s;
}

.btn-enroll:hover::before { left: 100%; }
.btn-enroll:hover {
  background: var(--celeste-oscuro);
  transform: translateY(-4px);
  box-shadow: 0 15px 30px rgba(0, 196, 255, 0.4);
}

/* Listas */
.list-check {
  list-style: none;
  padding-left: 0;
  margin: 0.8rem 0;
}

.list-check li {
  position: relative;
  padding-left: 1.8rem;
  margin-bottom: 0.5rem;
  color: #444;
  font-size: 0.95rem;
}

.list-check li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--celeste);
  font-weight: bold;
  font-size: 1.1rem;
}

/* Animaciones */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 992px) {
  #cursosModal .modal-dialog { max-width: 95%; }
  .courses-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
}

@media (max-width: 576px) {
  #cursosModal .modal-title { font-size: 1.5rem; }
  .submodal-content { width: 95%; max-width: none; }
  .submodal-body { padding: 1.8rem; }
  .btn-enroll { padding: 0.9rem 1.6rem; font-size: 1rem; }
  .submodal-header h2 { font-size: 1.7rem; }
  .detail-img { height: 250px; }
}

@media (min-width: 1400px) {
  .submodal-content { max-width: 1300px; }
}