/* ========================================
   Feria Internacional del Libro - La Paz 2026
   Tema Profesional Inspirado en SB UI Kit Pro
   ======================================== */

:root {
  --primary-magenta: #C41E7E;
  --primary-magenta-dark: #A8067F;
  --primary-magenta-light: #E63FA0;
  --secondary-orange: #FF7A3D;
  --secondary-orange-light: #FFA500;
  --secondary-orange-dark: #E85A1F;
  --accent-purple: #4D2E5C;
  --accent-purple-dark: #3D1E4A;
  --accent-purple-light: #6B3D7A;
  --light-bg: #F8F7FA;
  --text-dark: #2A2A2A;
  --text-light: #6B6B6B;
  --text-muted: #999999;
  --border-light: #E8E8E8;
  --white: #FFFFFF;
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ========================================
   Reset y Base
   ======================================== */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Roboto', 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  color: var(--text-dark);
  background-color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ========================================
   Tipografía
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--accent-purple-dark);
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  color: var(--primary-magenta);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.8rem);
  color: var(--accent-purple-dark);
  position: relative;
  padding-bottom: 1rem;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-magenta), var(--secondary-orange));
  border-radius: 2px;
}

h3 {
  font-size: 1.5rem;
  color: var(--accent-purple);
}

p {
  color: var(--text-light);
  font-size: 1rem;
  line-height: 1.8;
}

.lead {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-dark);
}

/* ========================================
   Topbar
   ======================================== */

.topbar {
  background: linear-gradient(135deg, var(--accent-purple-dark) 0%, var(--accent-purple) 100%);
  padding: 1rem 0;
  border-bottom: 3px solid var(--primary-magenta);
  font-size: 0.9rem;
  color: var(--white);
}

.topbar-logo {
  font-weight: 700;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topbar-logo span {
  color: var(--secondary-orange);
  font-weight: 800;
  font-size: 1.1rem;
}

.topbar-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.topbar-nav a {
  color: var(--white);
  text-decoration: none;
  transition: var(--transition);
  font-weight: 500;
  font-size: 0.9rem;
}

.topbar-nav a:hover {
  color: var(--secondary-orange);
  transform: translateY(-2px);
}

/* ========================================
   Navbar Principal
   ======================================== */

.navbar {
  background: var(--white);
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 99;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-magenta) !important;
  letter-spacing: -0.02em;
}

.navbar-brand span {
  color: var(--secondary-orange);
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-dark) !important;
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 1rem !important;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 1rem;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-magenta), var(--secondary-orange));
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: calc(100% - 2rem);
}

.nav-link:hover {
  color: var(--primary-magenta) !important;
}

/* ========================================
   Hero Section - SB UI Kit Style
   ======================================== */

.hero {
  background: linear-gradient(135deg, var(--accent-purple-dark) 0%, var(--accent-purple) 50%, var(--primary-magenta) 100%);
  color: var(--white);
  padding: 6rem 2rem;
  position: relative;
  overflow: hidden;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(255, 122, 61, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(196, 30, 126, 0.15) 0%, transparent 50%);
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.hero-text h1 {
  color: var(--white);
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: 1rem;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.2);
  animation: slideInLeft 0.8s ease-out;
}

.hero-text p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.15rem;
  margin-bottom: 1.5rem;
  animation: slideInLeft 0.8s ease-out 0.1s both;
}

.hero-dates {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.5rem;
  animation: slideInLeft 0.8s ease-out 0.2s both;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hero-dates i {
  color: var(--secondary-orange);
  font-size: 1.1rem;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  animation: slideInLeft 0.8s ease-out 0.3s both;
}

.hero-slider {
  position: relative;
  height: 500px;
  border-radius: 16px;
  overflow: visible; /* allow portrait images to be visible entirely */
  box-shadow: var(--shadow-lg);
  animation: slideInRight 0.8s ease-out;
  background: linear-gradient(135deg, var(--light-bg), #f0f0f0);
}

.carousel-slide {
  width: 100%;
  height: 100%;
  object-fit: contain; /* show full image without cropping */
  background: center center no-repeat;
  animation: zoomIn 0.6s ease-out;
}

/* Thumbnails for agenda modal */
.agenda-thumbs-container {
  border-top: 1px solid var(--border-light);
}
.agenda-thumbs .thumb-btn.active img {
  outline: 3px solid var(--primary-magenta);
}
.agenda-thumbs .thumb-btn img {
  opacity: 0.9;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.agenda-thumbs .thumb-btn:hover img {
  transform: scale(1.03);
  opacity: 1;
}
.agenda-thumbs { padding: 0.5rem 0; }

/* Page counter */
#agendaPageCounter {
  font-weight: 700;
  color: var(--accent-purple-dark);
}

.carousel-control-prev,
.carousel-control-next {
  background-color: rgba(0, 0, 0, 0.3);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
  background-color: rgba(0, 0, 0, 0.5);
}

@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem 1rem;
  }

  .hero-slider {
    height: 400px;
  }

  .hero {
    min-height: 100vh;
    padding: 4rem 1rem;
  }
}

/* ========================================
   Botones - Mejorados
   ======================================== */

.btn {
  font-weight: 600;
  padding: 0.85rem 2rem;
  border-radius: 8px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}


/* Ensure buttons have visible backgrounds by default (not only on hover) */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-magenta) 0%, var(--primary-magenta-dark) 100%);
  color: var(--white);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(196, 30, 126, 0.35);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary-orange) 0%, var(--secondary-orange-dark) 100%);
  color: var(--white);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(255, 122, 61, 0.35);
}

.btn-outline-primary {
  color: var(--white);
  border: 2px solid var(--white);
  background-color: transparent;
}

.btn-outline-primary:hover {
  background-color: var(--primary-magenta);
  border-color: var(--primary-magenta);
  color: var(--white);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.9rem;
}

/* ========================================
   Cards Mejoradas - Premium Style
   ======================================== */

.card {
  border: none;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
  height: 100%;
  position: relative;
  background: linear-gradient(135deg, #fff 0%, #f9f9f9 100%);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-magenta), var(--secondary-orange));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
  z-index: 1;
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(196, 30, 126, 0.05), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

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

.card:hover::before {
  transform: scaleX(1);
}

.card:hover::after {
  opacity: 1;
}

.card-header {
  background: linear-gradient(135deg, var(--secondary-orange) 0%, var(--secondary-orange-dark) 100%);
  color: var(--white);
  border: none;
  font-weight: 700;
  padding: 1.75rem;
  font-size: 1.1rem;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 2;
}

.card-header i {
  margin-right: 0.75rem;
  font-size: 1.2rem;
}

.card-body {
  padding: 2rem 1.75rem;
  position: relative;
  z-index: 2;
}

.card-title {
  color: var(--accent-purple-dark);
  font-weight: 700;
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.card-text {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 1rem;
}

.card-img-top {
  height: 250px;
  object-fit: cover;
  border-radius: 12px 12px 0 0;
}

/* ========================================
   Imagen cards con efecto
   ======================================== */

.card-img-container {
  position: relative;
  overflow: hidden;
  height: 280px;
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

.card-img-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

/* ========================================
   Badges y Tags
   ======================================== */

.badge {
  padding: 0.6rem 1.25rem;
  border-radius: 25px;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-block;
  box-shadow: var(--shadow-sm);
}

.badge-event {
  background: linear-gradient(135deg, var(--primary-magenta), var(--primary-magenta-dark));
  color: var(--white);
}

.badge-time {
  background: linear-gradient(135deg, var(--secondary-orange), var(--secondary-orange-dark));
  color: var(--white);
}

.badge-category {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-purple-dark));
  color: var(--white);
}

/* ========================================
   Secciones
   ======================================== */

.section {
  padding: 5rem 2rem;
  position: relative;
}

.section-light {
  background: linear-gradient(135deg, #f9f9f9 0%, var(--light-bg) 100%);
}

.section-dark {
  background: linear-gradient(135deg, var(--accent-purple-dark) 0%, var(--accent-purple) 100%);
  color: var(--white);
}

.section-title {
  text-align: left;
  margin-bottom: 3rem;
}

.section-title.center {
  text-align: center;
}

.section-title h2 {
  display: inline-block;
}

/* ========================================
   Grid de Eventos Mejorado
   ======================================== */

.event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2.5rem;
  margin-top: 2rem;
}

.event-card {
  background: var(--white);
  border-left: 5px solid var(--primary-magenta);
  border-radius: 12px;
  padding: 2rem;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.event-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, rgba(196, 30, 126, 0.08), transparent);
  border-radius: 0 0 100% 0;
}

.event-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-left-color: var(--secondary-orange);
}

.event-time {
  color: var(--secondary-orange);
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.event-time i {
  font-size: 1.2rem;
}

.event-title {
  color: var(--accent-purple-dark);
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 1rem;
}

.event-location {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.event-organizer {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-style: italic;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
  margin-top: 1rem;
}

/* ========================================
   Footer Mejorado
   ======================================== */

footer {
  background: linear-gradient(135deg, var(--accent-purple-dark) 0%, var(--accent-purple) 100%);
  color: var(--white);
  padding: 4rem 2rem 2rem;
  margin-top: 4rem;
}

footer h5 {
  color: var(--secondary-orange);
  margin-bottom: 1.5rem;
  font-weight: 700;
  font-size: 1.1rem;
}

footer p, footer a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  line-height: 1.8;
}

footer a {
  text-decoration: none;
  transition: color 0.3s ease;
  font-weight: 500;
}

footer a:hover {
  color: var(--secondary-orange);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin: 2rem 0;
}

.footer-links a {
  margin-right: 0;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin: 1.5rem 0;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--secondary-orange), var(--secondary-orange-dark));
  border-radius: 50%;
  color: var(--white);
  text-decoration: none;
  transition: var(--transition);
  font-size: 1.1rem;
  box-shadow: var(--shadow-sm);
}

.social-links a:hover {
  background: linear-gradient(135deg, var(--primary-magenta), var(--primary-magenta-dark));
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 2rem;
  margin-top: 2rem;
  text-align: center;
  font-size: 0.9rem;
}

/* ========================================
   Animaciones Keyframes
   ======================================== */

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

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

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

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

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* ========================================
   Utilidades
   ======================================== */

.highlight {
  color: var(--primary-magenta);
  font-weight: 700;
}

.text-secondary {
  color: var(--secondary-orange);
}

.opacity-75 {
  opacity: 0.75;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-magenta), var(--secondary-orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 992px) {
  .section {
    padding: 3rem 1.5rem;
  }

  .hero {
    min-height: auto;
    padding: 3rem 1rem;
  }

  .event-grid {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h2::after {
    width: 40px;
  }

  .section {
    padding: 2rem 1rem;
  }

  .hero-buttons {
    gap: 1rem;
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .event-card {
    border-left-width: 4px;
  }

  .hero-slider {
    height: 300px;
  }

  footer {
    padding: 2rem 1rem 1rem;
  }

  .topbar-nav {
    gap: 1rem;
  }

  .topbar-nav a {
    font-size: 0.8rem;
  }

  .event-grid {
    grid-template-columns: 1fr;
  }

  .card-header {
    padding: 1.25rem;
    font-size: 1rem;
  }
}

@media (max-width: 576px) {
  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .hero {
    min-height: auto;
    padding: 2rem 1rem;
  }

  .hero-content {
    gap: 1.5rem;
  }

  .hero-slider {
    height: 250px;
  }

  .carousel-control-prev,
  .carousel-control-next {
    width: 40px;
    height: 40px;
  }

  .card-body {
    padding: 1.5rem 1rem;
  }

  .topbar {
    padding: 0.75rem 0;
  }

  .topbar-nav {
    gap: 0.75rem;
  }

  .topbar-nav a {
    font-size: 0.75rem;
  }

  .section-title {
    margin-bottom: 2rem;
  }
}