/* ===== ESTILOS PÁGINA PRINCIPAL SECOTOGPT ===== */
/* Mejoras UX con animaciones sutiles, paleta coherente y modo nocturno optimizado */

/* ===== VARIABLES Y PALETA DE COLORES ===== */
:root {
  /* Colores principales coherentes con header */
  --color-se: #a8edea;
  --color-co: #fed6e3;
  --color-to: #fcb69f;
  --color-gpt: #cfd9df;
  
  /* Gradientes principales */
  --gradient-se-co: linear-gradient(135deg, #a8edea, #fed6e3);
  --gradient-co-to: linear-gradient(135deg, #fed6e3, #fcb69f);
  --gradient-to-gpt: linear-gradient(135deg, #fcb69f, #cfd9df);
  --gradient-gpt-se: linear-gradient(135deg, #cfd9df, #a8edea);
  
  /* Sombras y profundidad */
  --shadow-light: 0 4px 20px rgba(168, 237, 234, 0.15);
  --shadow-medium: 0 8px 32px rgba(168, 237, 234, 0.2);
  --shadow-strong: 0 12px 48px rgba(168, 237, 234, 0.25);
  
  /* Modo claro */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: rgba(248, 250, 252, 0.8);
  --text-primary: #22223b;
  --text-secondary: #64748b;
  --border-color: rgba(168, 237, 234, 0.2);
}

.dark {
  /* Modo oscuro optimizado */
  --bg-primary: rgba(30, 41, 59, 0.9);
  --bg-secondary: rgba(15, 23, 42, 0.95);
  --bg-tertiary: rgba(30, 41, 59, 0.6);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --border-color: rgba(255, 255, 255, 0.1);
  
  /* Sombras para modo oscuro */
  --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-strong: 0 12px 48px rgba(0, 0, 0, 0.5);
}

/* ===== LAYOUT PRINCIPAL ===== */
.main-content {
  padding: 2rem 0;
  animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== SECCIÓN DE BIENVENIDA ===== */
.welcome-section {
  text-align: center;
  margin-bottom: 4rem;
  padding: 3rem 1rem;
  position: relative;
  overflow: hidden;
}

.welcome-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-se-co);
  opacity: 0.03;
  z-index: -1;
}

.welcome-title {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  background: var(--gradient-se-co);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: slideInDown 1s ease-out 0.3s both;
}

.welcome-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  animation: slideInDown 1s ease-out 0.6s both;
}

.welcome-description {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  animation: slideInDown 1s ease-out 0.9s both;
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== TARJETAS PRINCIPALES ===== */
.cards-section {
  margin-top: 4rem;
}

.topic-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  height: 100%;
  backdrop-filter: blur(10px);
  animation: fadeInScale 0.6s ease-out both;
}

.topic-card:nth-child(1) { animation-delay: 0.1s; }
.topic-card:nth-child(2) { animation-delay: 0.2s; }
.topic-card:nth-child(3) { animation-delay: 0.3s; }
.topic-card:nth-child(4) { animation-delay: 0.4s; }

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.topic-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  transition: all 0.4s ease;
}

.topic-card.se-card::before {
  background: var(--gradient-se-co);
}

.topic-card.co-card::before {
  background: var(--gradient-co-to);
}

.topic-card.to-card::before {
  background: var(--gradient-to-gpt);
}

.topic-card.gpt-card::before {
  background: var(--gradient-gpt-se);
}

.topic-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-medium);
}

.topic-card:hover::before {
  height: 6px;
}

.card-body {
  padding: 2rem;
  position: relative;
}

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

.topic-card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
}

.se-card .card-icon {
  background: var(--gradient-se-co);
  color: white;
}

.co-card .card-icon {
  background: var(--gradient-co-to);
  color: white;
}

.to-card .card-icon {
  background: var(--gradient-to-gpt);
  color: white;
}

.gpt-card .card-icon {
  background: var(--gradient-gpt-se);
  color: white;
}

.card-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.card-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

/* ===== BOTONES MODERNOS ===== */
.btn-modern {
  background: transparent;
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 2rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.btn-modern::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  transition: left 0.3s ease;
  z-index: -1;
}

.se-card .btn-modern::before {
  background: var(--gradient-se-co);
}

.co-card .btn-modern::before {
  background: var(--gradient-co-to);
}

.to-card .btn-modern::before {
  background: var(--gradient-to-gpt);
}

.gpt-card .btn-modern::before {
  background: var(--gradient-gpt-se);
}

.btn-modern:hover {
  color: white;
  border-color: transparent;
  transform: translateY(-2px);
}

.btn-modern:hover::before {
  left: 0;
}

.btn-icon {
  transition: transform 0.3s ease;
}

.btn-modern:hover .btn-icon {
  transform: translateX(4px);
}

/* ===== SECCIONES HISTORIA Y CONTACTO ===== */
.content-section {
  margin: 5rem 0;
  padding: 4rem 2rem;
  border-radius: 2rem;
  position: relative;
  overflow: hidden;
}

.content-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.05;
  z-index: -1;
}

.history-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.history-section::before {
  background: var(--gradient-co-to);
}

.contact-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.contact-section::before {
  background: var(--gradient-to-gpt);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.section-subtitle {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.timeline-card, .contact-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
  height: 100%;
}

.timeline-card:hover, .contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-light);
}

.timeline-icon, .contact-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.timeline-card:nth-child(1) .timeline-icon {
  color: var(--color-se);
}

.timeline-card:nth-child(2) .timeline-icon {
  color: var(--color-co);
}

.timeline-card:nth-child(3) .timeline-icon {
  color: var(--color-to);
}

.contact-card:nth-child(1) .contact-icon {
  color: var(--color-se);
}

.contact-card:nth-child(2) .contact-icon {
  color: var(--color-co);
}

.contact-card:nth-child(3) .contact-icon {
  color: var(--color-to);
}

.timeline-title, .contact-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.timeline-description, .contact-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== RESPONSIVIDAD ===== */
@media (max-width: 768px) {
  .main-content {
    padding: 1rem 0;
  }
  
  .welcome-section {
    padding: 2rem 1rem;
    margin-bottom: 3rem;
  }
  
  .welcome-title {
    font-size: 2.5rem;
  }
  
  .content-section {
    margin: 3rem 0;
    padding: 2rem 1rem;
    border-radius: 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .card-body {
    padding: 1.5rem;
  }
  
  .topic-card {
    margin-bottom: 1.5rem;
  }
}

@media (max-width: 576px) {
  .welcome-title {
    font-size: 2rem;
  }
  
  .welcome-subtitle {
    font-size: 1rem;
  }
  
  .card-icon {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
  }
  
  .btn-modern {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }
}

/* ===== ANIMACIONES DE SCROLL ===== */
@media (prefers-reduced-motion: no-preference) {
  .scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  .scroll-animate.in-view {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Disable animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}