:root {
  /* Nueva paleta de colores moderna */
  --primary-bg: #070811;  /* Azul oscuro profundo */
  --card-from: rgba(99, 102, 241, 0.1);  /* Indigo suave */
  --card-to: rgba(15, 23, 42, 0.95);     /* Azul oscuro */
  --header-bg: rgba(15, 23, 42, 0.9);    /* Azul oscuro con transparencia */
  --nav-bg: rgba(15, 23, 42, 0.7);       /* Azul oscuro más transparente */
  --accent-glow: rgba(129, 140, 248, 0.2); /* Indigo brillante */
  --text-primary: #f1f5f9;              /* Gris muy claro (casi blanco) */
  --text-secondary: #b0bec5;            /* Gris azulado aún más claro para un contraste perfecto */
  --button-hover: rgba(99, 102, 241, 0.4); /* Indigo hover */
  --button-active: #6366f1;             /* Indigo sólido */
  --card-hover: rgba(99, 102, 241, 0.15); /* Indigo hover para cards */
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, sans-serif;
}

body {
  background: var(--primary-bg);
  min-height: 100vh;
  color: var(--text-primary);
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--header-bg);
  backdrop-filter: blur(8px);
  z-index: 50;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
  text-align: center;
}

h1 {
  font-size: 2.5rem;
  font-weight: bold;
  background: linear-gradient(to right, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 30px rgba(36, 37, 105, 0.3);
}

nav {
  position: fixed;
  top: 6rem;
  width: 100%;
  background: var(--nav-bg);
  padding: 0 1rem;
  backdrop-filter: blur(8px);
  z-index: 40;
}

.nav-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 0;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.search-container {
  max-width: 1200px;
  margin: 0 auto;
  padding-bottom: 1rem;
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-secondary);
}

#search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 3rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(99, 102, 241, 0.2);
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
}

#search-input:focus {
  outline: none;
  border-color: var(--button-active);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.nav-button {
  padding: 0.5rem 1.5rem;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
  background: rgba(99, 102, 241, 0.1);
  color: var(--text-secondary);
}

.nav-button:hover {
  background: var(--button-hover);
  transform: translateY(-2px);
}

.nav-button:active {
  transform: scale(0.95);
  transition: transform 0.1s ease;
}

.nav-button.active {
  background: var(--button-active);
  color: white;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16rem 1rem 4rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.card {
  position: relative;
  background: linear-gradient(135deg, var(--card-from), var(--card-to));
  padding: 1.5rem;
  border-radius: 1rem;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid rgba(99, 102, 241, 0.1);
  /* Propiedades para la animación escalonada */
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.5s ease-out forwards;
}

.card::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: linear-gradient(to right, var(--accent-glow), var(--accent-glow));
  border-radius: 1rem;
  filter: blur(1px);
  opacity: 0.25;
  transition: opacity 1s ease;
}

.card:hover {
  transform: scale(1.05);
  background: linear-gradient(135deg, var(--card-hover), var(--card-to));
  border-color: rgba(99, 102, 241, 0.3);
}

.card:hover::before {
  opacity: 1;
  transition: opacity 0.2s ease;
}

.card-content {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.icon-container {
  padding: 0.75rem;
  background: var(--button-hover);
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
  width: 50px; /* Ancho fijo para consistencia */
  height: 50px; /* Alto fijo para consistencia */
}

.icon-container i {
  font-size: 1.5rem;
  color: var(--text-primary);
  transition: transform 0.3s ease;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-primary);
}
.card:hover .icon-container i {
  transform: rotate(-15deg) scale(1.1);
}

.credentials {
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: rgba(2, 24, 77, 0.8);
  padding: 0.75rem;
  border-radius: 0.5rem;
  width: 100%;
  text-align: center;
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.no-results {
  display: none; /* Oculto por defecto */
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-secondary);
}

.no-results i {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.no-results p {
  font-size: 1.25rem;
}

.card a {
  text-decoration: none;
  color: inherit;
}

footer {
  background: rgba(42, 50, 70, 0.95);
  color: var(--text-secondary);
  text-align: center;
  padding: 1rem;
  border-top: 1px solid rgba(99, 102, 241, 0.2);
}

.section {
  display: none;
  /* Prevents the footer from jumping when switching tabs (reduces CLS) */
  min-height: 40vh;
}

.section.active {
  display: block;
}

@keyframes fadeIn {
  to {
      opacity: 1;
      transform: translateY(0);
  }
}

@media (max-width: 768px) {
  h1 {
      font-size: 1.875rem;
  }

  .nav-content {
      flex-wrap: wrap;
  }

  .nav-button {
      font-size: 0.875rem;
      padding: 0.375rem 1rem;
  }

  main {
      padding-top: 18rem;
  }
}