/* ===================================================================
   ISLP Bolivia - Paleta de Colores Armónica
   Basada en Teoría del Color HSL (Colorimetría Matemática)
   Versión: 2026.1
   =================================================================== */

:root {
  /* Colores Primarios - Azul Estadístico */
  --primary-dark: #2E5090;      /* Azul profundo - confianza */
  --primary-medium: #3D6BB3;    /* Azul medio - balance */
  --primary-light: #5A89D6;     /* Azul claro - energía */
  
  /* Colores Secundarios - Acentos */
  --secondary-accent: #E74C3C;  /* Rojo cálido - llamada a acción */
  --secondary-warmth: #F39C12;  /* Naranja - energía positiva */
  --secondary-success: #27AE60; /* Verde - éxito/validación */
  
  /* Colores Neutros */
  --neutral-light: #ECF0F1;     /* Fondo claro */
  --neutral-medium: #BDC3C7;    /* Separador */
  --neutral-dark: #2C3E50;      /* Texto principal */
  --neutral-white: #FFFFFF;     /* Blanco puro */
  
  /* Colores Complementarios (Esquema Triádico) */
  --complement-1: #9B59B6;      /* Púrpura - Gauss */
  --complement-2: #2ECC71;      /* Verde esmeralda - Bernoulli */
  --complement-3: #E67E22;      /* Naranja oscuro - Poisson */
  
  /* Sombras y Gradientes */
  --shadow-light: rgba(0, 0, 0, 0.05);
  --shadow-medium: rgba(0, 0, 0, 0.1);
  --shadow-dark: rgba(0, 0, 0, 0.15);
}

/* ===================================================================
   CATEGORÍAS - Paleta Específica por Categoría
   =================================================================== */

/* Categoría Laplace (Primaria) - Azules */
.category-laplace {
  --cat-primary: #3498db;
  --cat-dark: #2980b9;
  --cat-light: #5dade2;
  --cat-shadow: rgba(52, 152, 219, 0.08);
}

/* Categoría Bernoulli (Secundaria) - Verdes */
.category-bernoulli {
  --cat-primary: #2ecc71;
  --cat-dark: #27ae60;
  --cat-light: #58d68d;
  --cat-shadow: rgba(46, 204, 113, 0.08);
}

/* Categoría Poisson (Bachillerato) - Naranjas */
.category-poisson {
  --cat-primary: #f39c12;
  --cat-dark: #e67e22;
  --cat-light: #f8b88b;
  --cat-shadow: rgba(241, 196, 15, 0.08);
}

/* Categoría Gauss (Universitarios) - Púrpuras */
.category-gauss {
  --cat-primary: #9b59b6;
  --cat-dark: #8e44ad;
  --cat-light: #af7ac5;
  --cat-shadow: rgba(155, 89, 182, 0.08);
}

/* ===================================================================
   ESTILOS GLOBALES - Aplicando Paleta Armónica
   =================================================================== */

body {
  color: var(--neutral-dark);
  background-color: var(--neutral-white);
}

/* Encabezados */
h1, h2, h3, h4, h5, h6 {
  color: var(--neutral-dark);
  font-weight: 700;
}

.section-heading {
  color: var(--primary-dark);
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  font-weight: 800;
}

.section-subheading {
  color: var(--neutral-dark);
  opacity: 0.8;
  font-size: 1.2rem;
  line-height: 1.8;
}

/* Botones */
.btn {
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-primary, .btn-xl {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--neutral-white);
}

.btn-primary:hover, .btn-xl:hover {
  background-color: var(--primary-medium);
  border-color: var(--primary-medium);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px var(--shadow-dark);
}

.btn-accent {
  background-color: var(--secondary-accent);
  border-color: var(--secondary-accent);
  color: var(--neutral-white);
}

.btn-accent:hover {
  background-color: #c0392b;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(231, 76, 60, 0.3);
}

.btn-success {
  background-color: var(--secondary-success);
  border-color: var(--secondary-success);
  color: var(--neutral-white);
}

.btn-success:hover {
  background-color: #229954;
  transform: translateY(-2px);
}

/* Enlaces */
a {
  color: var(--primary-dark);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-medium);
  text-decoration: underline;
}

/* Secciones */
section {
  padding: 80px 0;
}

.bg-primary {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-medium) 100%);
  color: var(--neutral-white);
}

.bg-light-gray {
  background-color: var(--neutral-light);
}

.bg-light-gray-alt {
  background-color: #f5f7fa;
}

/* Tarjetas */
.card, .category-card {
  border: 1px solid var(--neutral-medium);
  border-radius: 12px;
  box-shadow: 0 4px 12px var(--shadow-light);
  transition: all 0.3s ease;
  overflow: hidden;
}

.card:hover, .category-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px var(--shadow-medium);
}

/* ===================================================================
   RESPONSIVE Y ACCESIBILIDAD
   =================================================================== */

@media (max-width: 768px) {
  .section-heading {
    font-size: 2rem;
  }
  
  .section-subheading {
    font-size: 1rem;
  }
  
  section {
    padding: 60px 0;
  }
}

/* Modo oscuro (opcional) */
@media (prefers-color-scheme: dark) {
  :root {
    --neutral-light: #1a1a1a;
    --neutral-dark: #e0e0e0;
    --neutral-white: #0d0d0d;
  }
  
  body {
    background-color: var(--neutral-white);
    color: var(--neutral-dark);
  }
}

/* Focus para accesibilidad */
a:focus, button:focus, input:focus {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
}