/* Paleta de colores como variables */
:root {
  --moonstone-100: #122023;
  --moonstone-200: #244047;
  --moonstone-300: #35606a;
  --moonstone-400: #47808d;
  --moonstone-500: #5c9ead;
  --moonstone-600: #7db2bd;
  --moonstone-700: #9dc5ce;
  --moonstone-800: #bed8de;
  --moonstone-900: #deecef;

  --white-100: #333333;
  --white-200: #666666;
  --white-300: #999999;
  --white-400: #cccccc;
  --white-500: #ffffff;

  --paynes-gray: #326273;
  --paynes-gray-dark: #1e3a44;

  --anti-flash-white: #eeeeee;

  --atomic-tangerine: #e39774;
  --atomic-tangerine-dark: #d76c3b;
   --orange-deep: #D84A05;
  --orange-soft: #e8691a;
  --orange-light: #f08a3c;
  --orange-flame: #FA5C00;
  --sky-blue: #58C5E8;
}

/* Reset general */
body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: var(--anti-flash-white);
  color: var(--white-100);
}

/* Navegación */
nav {
  background-color: var(--moonstone-500);
  padding: 10px 20px;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0;
  padding: 0;
}

nav ul li {
  margin: 0 10px;
  position: relative;
}

nav a {
  text-decoration: none;
  color: white;
  font-weight: bold;
  padding: 8px 12px;
  border-radius: 4px;
}

nav a:hover {
  background-color: var(--moonstone-400);
}

/* Dropdown */
.dropdown-content {
  display: none;
  position: absolute;
  background-color: var(--moonstone-700);
  min-width: 160px;
  box-shadow: 0px 4px 8px rgba(0,0,0,0.2);
  z-index: 1;
  border-radius: 4px;
}

.dropdown:hover .dropdown-content {
  display: block;
}

.dropdown-content a {
  color: white;
  padding: 10px 16px;
  display: block;
}

.dropdown-content a:hover {
  background-color: var(--moonstone-400);
}

/* Header */
header {
  background-color: var(--moonstone-600);
  color: white;
  padding: 40px 20px;
  text-align: center;
}

/* Secciones */
main section {
  padding: 40px 20px;
}

#essential-ideas {
  background-color: var(--moonstone-900);
}

#guided-types {
  background-color: var(--atomic-tangerine);
}

#pros {
  background-color: var(--moonstone-800);
}

#cons {
  background-color: var(--atomic-tangerine-dark);
  color: white;
}

#references {
  background-color: var(--moonstone-700);
  color: white;
}

#example-link {
  background-color: var(--moonstone-600);
  color: white;
}

/* Flex de contenido */
.section-flex {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.section-text {
  flex: 1 1 50%;
}

.section-img {
  flex: 1 1 45%;
  text-align: center;
}

.section-img img {
  max-width: 100%;
  width: 300px;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
}

/* Imágenes de cuadrícula */
.image-grid {
  display: flex;
  justify-content: space-around;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 20px;
}

.image-grid img {
  width: 180px;
  height: 140px;
  object-fit: cover;
  border: 2px solid #ccc;
  border-radius: 10px;
  cursor: pointer;
}

/* Popup */
.popup {
  display: none;
  position: fixed;
  z-index: 10;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.6);
}

.popup-content {
  background-color: white;
  margin: 10% auto;
  padding: 20px;
  width: 80%;
  max-width: 600px;
  border-radius: 10px;
  position: relative;
  color: var(--white-100);
}

.close {
  position: absolute;
  right: 15px;
  top: 10px;
  font-size: 20px;
  font-weight: bold;
  color: var(--white-100);
  cursor: pointer;
}

/* Botón PDF */
.document-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  background-color: var(--paynes-gray);
  color: white;
  padding: 15px 20px;
  border-radius: 8px;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.document-link:hover {
  background-color: var(--paynes-gray-dark);
}

.document-link img {
  width: 32px;
  height: 32px;
}

/* Footer */
footer {
  background-color: var(--moonstone-500);
  color: white;
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
}