/* style.css - Diseño moderno para Congreso Nacional de Ingeniería Industrial y de Sistemas 2026 */

/* Variables de colores y fuentes */
:root {
  --color-primary: #102F5E;
  --color-secondary: #008037;
  --color-accent: #953149;
  --color-light: #ffffff;
  --color-dark: #0c0e1b;
  --font-primary: 'Poppins', sans-serif;
  --font-secondary: 'Roboto', sans-serif;
  --transition: all 0.3s ease-in-out;
  --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  --border-radius: 8px;
}

/* Importación de fuentes */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&family=Roboto:wght@300;400;500;700&display=swap');

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

html {
  scroll-behavior: smooth;
}

/* SOLUCIÓN CORREGIDA: Ajuste para que las secciones no sean tapadas por el navbar */
section[id] {
  scroll-margin-top: 90px; /* Valor ajustado según la altura real del navbar */
}

/* Alternativa para navegadores más antiguos */
section::before {
  display: block;
  content: "";
  height: 90px;
  margin-top: -90px;
  visibility: hidden;
}

body {
  font-family: var(--font-secondary);
  color: #333;
  line-height: 1.6;
  overflow-x: hidden;
  background-color: #ffffff;
  text-align: justify;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-primary);
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-accent);
}

p {
  margin-bottom: 1rem;
}

a {
  text-decoration: none;
  color: var(--color-dark);
  transition: var(--transition);
}

.li {
  color: var(--color-primary);
  font-size: 18px;
}

a:hover {
  color: var(--color-accent);
}

ul {
  list-style-position: inside;
  margin-bottom: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

.container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 20px;
}

.row {
  gap: 20px;
}

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

.texto-centrado {
  text-align: center;
  margin-bottom: 2rem;
}

/* Navbar - FONDO AZUL CORREGIDO */
.navbar {
  background-color: var(--color-primary) !important; /* Forzar color azul */
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 1px 0;
  transition: var(--transition);
  height: 90px; /* Altura fija para el navbar */
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-light) !important; /* Texto blanco para contraste */
}

.logo-navbar {
  width: 230px;
  height: auto;
}

.navbar-nav .nav-link {
  color: var(--color-light) !important; /* Texto blanco para contraste */
  font-weight: 500;
  padding: 0.5rem 1rem;
  margin: 0 0.2rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.navbar-toggler {
  border: none;
  padding: 0.25rem 0.5rem;
}

.navbar-toggler:focus {
  box-shadow: none;
}

/* CORRECCIÓN: Menú colapsable en móviles con fondo azul */
.navbar-collapse {
  background-color: var(--color-primary);
}

@media (max-width: 991.98px) {
  .navbar-collapse {
    padding: 1rem;
    margin-top: 10px;
    border-radius: var(--border-radius);
  }
}

/* Header */
header#inicio {
  position: relative;
  overflow: hidden;
  height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

header#inicio img {
  object-fit: cover;
  height: 100%;
  width: 100%;
}

/* Secciones generales */
section {
  padding: 4rem 0;
  position: relative;
}

section h2 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  position: relative;
  padding-bottom: 0.5rem;
  text-align: center;
}

section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
}

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

.fondo-verde .card {
  border-top: 4px solid var(--azul-congreso);
}

.institution-card {
  background: white;
  border-radius: 8px;
  padding: 0;
  margin-bottom: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid #ddd;
  overflow: hidden;
}

.institution-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px var(--color-secondary) !important;
}

.efect {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.efect:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px var(--color-secondary) !important;
}

/* Tarjetas con color primario (azul) */
.institution-card.primary .institution-title {
  background-color: var(--color-primary);
}

/* Tarjetas con color de acento (rojo) */
.institution-card.accent .institution-title {
  background-color: var(--color-accent);
}

.institution-title {
  font-size: 1.25rem;
  font-weight: bold;
  color: white;
  padding: 1rem 1.5rem;
  margin: 0;
  text-align: left;
}

.institution-list {
  list-style-type: none;
  padding: 1.5rem;
  margin: 0;
}

.institution-list li {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: #495057;
  position: relative;
  padding-left: 1.5em;
  border-bottom: none;
}

.institution-list li::before {
  content: "•";
  font-weight: bold;
  position: absolute;
  left: 0;
}

.congress {
  color: var(--color-primary);
}

.con-card {
  text-align: justify;
  max-width: 40%;
  max-height: 40%;
  float: left;
  position: relative;
  left: 10%;
}

.category-card {
  float: left;
  position: relative;
  left: 8%;
}

.date-card {
  float: left;
  position: relative;
  left: 8%;
}

/* Sección de Convocatoria */
#convocatoria {
  background-color: var(--color-light);
}

#convocatoria h2 {
  color: var(--color-accent);
}

#convocatoria h6 {
  color: var(--color-primary);
  margin-top: 1.5rem;
  font-weight: 600;
}

#convocatoria ul {
  padding-left: 0;
}

#convocatoria ul li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.8rem;
}

/* Sección de Registro */
#registro {
  color: var(--color-dark);
  text-align: center;
}

#registro h2 {
  color: var(--color-accent)
}

#registro h2::after {
  background: var(--color-accent);
}

#registro p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

#historia img {
  display: block;
  margin: 20px auto;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-button {
  display: inline-block;
  background-color: var(--color-accent);
  color: white;
  padding: 12px 30px;
  border-radius: 50px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: var(--transition);
  border: 2px solid var(--color-accent);
}

.btn-button:hover {
  background-color: var(--color-dark);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

#programa {
  background-color: var(--color-light);
}

#programa ul {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
  padding-left: 0;
}

#programa ul li {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  text-align: center;
  font-weight: 500;
  transition: var(--transition);
  border-top: 4px solid var(--color-secondary);
  grid-column: span 2;
}

#programa ul li:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px var(--color-secondary);
}

/* Las últimas 2 tarjetas: centradas */
#programa ul li:nth-child(4) {
  grid-column: 2 / 4;
}

#programa ul li:nth-child(5) {
  grid-column: 4 / 6;
}

/* Sección de Contacto */
#contacto {
  background-color: white;
}

/* Cinta de logos */
.cinta-logos {
  background-color: white;
  padding: 3rem 0;
  overflow: hidden;
  position: relative;
}

.slider {
  height: 200px;
  margin: auto;
  overflow: hidden;
  position: relative;
  width: 100%;
}

.galeria-img {
  height: 250px;
  width: 100%;
  object-fit: cover;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.col {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: 12px;
}

.col-4 {
  flex-shrink: 0;
  width: calc(33.33% - 13.33px);
}

.slider::before,
.slider::after {
  content: "";
  height: 100px;
  position: absolute;
  width: 100px;
  z-index: 2;
}

.slider::after {
  right: 0;
  top: 0;
  transform: rotateZ(180deg);
}

.slide-track {
  animation: scroll 30s linear infinite;
  display: flex;
  width: calc(250px * 28);
}

.slide-track:hover {
  animation-play-state: paused;
}

.slider img {
  height: 80px;
  width: 200px;
  object-fit: contain;
  margin: 0 20px;
  padding: 10px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.slider img:hover {
  transform: scale(1.05);
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(calc(-250px * 14));
  }
}

/* Footer */
footer {
  background-color: var(--color-primary);
  color: white;
  padding: 2rem 0;
  text-align: center;
}

/* Efectos y animaciones */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar-toggler {
  border: 1px solid rgba(255, 255, 255, 0.3);
}

#historia .card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  padding: 30px;
  transition: all 0.3s ease;
  margin-bottom: 30px;
  max-width: 87%;
  max-height: 100%;
  float: left;
  position: relative;
  left: 7%;
}

#historia .card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px var(--color-secondary) !important;
}

#historia .card-header {
  border-radius: 15px 15px 0 0;
  margin: -30px -30px 20px -30px;
  padding: 20px;
}

#historia .card-header h3 {
  font-size: 1.5rem;
  font-weight: bold;
  color: white;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0.5rem;
}

#historia .card-header p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0.3rem;
}

#historia .card-body {
  padding: 0;
}

.fondo {
  background-color: rgba(255, 255, 255, 0.596);
}

#historia .card-text {
  margin-bottom: 20px;
  color: #555;
}

#historia ul {
  padding-left: 20px;
}

#historia li {
  margin-bottom: 8px;
  position: relative;
}

.dual-image-container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin: 30px 0;
}

.dual-image-container img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.dual-image-container img:hover {
  transform: scale(1.02);
}

/* Para pantallas grandes (2 imágenes lado a lado) */
@media (min-width: 768px) {
  .dual-image-container img {
    max-width: 45%;
  }
}

/* Para pantallas pequeñas (imágenes apiladas) */
@media (max-width: 767px) {
  .dual-image-container {
    flex-direction: column;
  }

  .dual-image-container img {
    max-width: 90%;
  }
}

@media (max-width: 768px) {
  .navbar-brand {
    font-size: 1.2rem;
  }

  .con-card {
    max-width: 100%;
    float: none;
    left: 0;
    margin-bottom: 2rem;
    display: block;
  }

  .category-card {
    max-width: 100%;
    float: none;
    left: 0;
    margin-bottom: 2rem;
    display: block;
  }

  .date-card {
    max-width: 100%;
    float: none;
    left: 0;
    margin-bottom: 2rem;
    display: block;
  }

  .logo-navbar {
    width: 230px;
    height: auto;
  }

  header#inicio {
    height: 60vh;
  }

  header#inicio img {
    object-fit: cover;
    width: 100%;
    height: 100%;
  }

  section {
    padding: 3rem 0;
  }

  section h2 {
    font-size: 1.8rem;
  }

  /* Ajuste específico para scroll en móviles */
  section[id] {
    scroll-margin-top: 70px;
  }

  section::before {
    height: 70px;
    margin-top: -70px;
  }

  /* Programa responsive */
  #programa ul {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  #programa ul li {
    grid-column: span 1;
  }

  /* Resetear las posiciones específicas en móviles */
  #programa ul li:nth-child(4),
  #programa ul li:nth-child(5) {
    grid-column: 1;
  }

  .slider img {
    height: 60px;
    width: 150px;
  }

  .col {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .col-4,
  .col-md-4 {
    width: 100%;
    max-width: none;
  }

  /* Ajustes para las tarjetas de institución en móviles */
  .institution-card {
    margin-bottom: 1.5rem;
  }

  .institution-title {
    font-size: 1.1rem;
    padding: 0.8rem 1rem;
  }

  .institution-list {
    padding: 1rem;
  }

  .institution-list li {
    font-size: 0.9rem;
  }
}

.slide-track img {
  width: 150px;
  height: auto;
  object-fit: contain;
  padding: 0 10px;
}

header#inicio {
  width: auto;
  height: auto;
}

/* Ajustes responsivos para imágenes */
@media (max-width: 768px) {
  .img-centered,
  #historia img,
  #convoca img {
    max-width: 90%;
    margin: 15px auto;
  }

  /* Ajustes para la sección de historia en móviles */
  #historia .card {
    padding: 20px;
  }

  #historia .card-header {
    margin: -20px -20px 20px -20px;
    padding: 15px;
  }
}

@media (min-width: 768px) {
  .dual-image-container img {
    max-width: 45%;
  }
}

/* Para pantallas pequeñas (imágenes apiladas) */
@media (max-width: 767px) {
  .dual-image-container {
    flex-direction: column;
  }

  .dual-image-container img {
    max-width: 90%;
  }
}