/* ==========================================================================
   Índice de Inclusión y Discapacidad (IID) - Sistema de Diseño y Estilos
   Guatemala 2024 - 2026
   ========================================================================== */

/* --- Importación de Fuentes Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Lato:ital,wght@0,300;0,400;0,700;0,900;1,400&family=Montserrat:wght@400;500;600;700;800;900&family=Space+Grotesk:wght@500;700&display=swap');

/* --- Variables CSS y Variables del Tema --- */
:root {
  --font-primary: 'Lato', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-math: 'Space Grotesk', monospace, sans-serif;

  /* Paleta Claro (Default) */
  --bg-main: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.92);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --bg-header: rgba(255, 255, 255, 0.88);
  --bg-footer: #0f172a;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-inverse: #f8fafc;
  
  --primary: #0284c7;        /* Azul ONU Emblemático de la Bandera */
  --primary-hover: #0369a1;  /* Azul ONU Intenso */
  --primary-light: #e0f2fe;  /* Azul Claro Suave */
  
  --accent: #e11d48;         /* Rojo ODS Emblemático (Educación / Igualdad) */
  --accent-secondary: #10b981; /* Verde ODS (Salud / Vida Terrestre) */
  --accent-gold: #d97706;   /* Dorado ODS (Industria / Ciudades) */
  
  --border-color: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.12);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-scale: 1rem;
}

/* Modo Oscuro */
[data-theme="dark"] {
  --bg-main: #0b0f19;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-hover: rgba(31, 41, 55, 0.95);
  --bg-header: rgba(15, 23, 42, 0.9);
  --bg-footer: #030712;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: #1e293b;

  --accent: #38bdf8;
  --accent-secondary: #14b8a6;
  --accent-gold: #fbbf24;

  --border-color: #1e293b;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.5);
}

/* Modo Alto Contraste (Accesibilidad) */
body.high-contrast {
  --bg-main: #000000 !important;
  --bg-card: #000000 !important;
  --bg-header: #000000 !important;
  --bg-footer: #000000 !important;
  --text-main: #ffff00 !important; /* Amarillo alto contraste */
  --text-muted: #ffffff !important;
  --primary: #ffff00 !important;
  --accent: #00ffff !important;
  --border-color: #ffffff !important;
}
body.high-contrast * {
  border-color: #ffffff !important;
  box-shadow: none !important;
}

/* --- Resets & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-scale);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

/* --- Accesibilidad: Saltos Directos --- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--primary);
  color: #fff;
  padding: 0.75rem 1.5rem;
  z-index: 9999;
  border-radius: var(--radius-sm);
  font-weight: 700;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 1rem;
}

/* --- Barra Superior de Accesibilidad --- */
.accessibility-bar {
  background: #0f172a;
  color: #94a3b8;
  font-size: 0.85rem;
  padding: 0.4rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.accessibility-bar .bar-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.accessibility-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-acc {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: var(--transition);
}

.btn-acc:hover, .btn-acc:focus {
  background: var(--primary);
  border-color: var(--primary-hover);
}

/* --- Navbar Principal --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.8rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.4rem;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.brand-logo .logo-badge {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #ffffff;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 800;
}

.brand-logo span.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-logo .brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.brand-logo .brand-subtext {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  position: relative;
  transition: var(--transition);
}

.nav-link:hover, .nav-link:focus {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.9rem;
  right: 0.9rem;
  height: 3px;
  background: var(--primary);
  border-radius: 3px 3px 0 0;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* --- Banner Hero --- */
.hero-banner {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #ffffff;
  padding: 4rem 1.5rem;
  background-color: #0f172a; /* Fallback para legibilidad */
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(15, 23, 42, 0.40) 0%, rgba(15, 23, 42, 0.75) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 960px;
  margin: 0 auto;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.7);
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 600;
  max-width: 800px;
  margin: 0 auto 1.5rem auto;
  line-height: 1.6;
  color: #f1f5f9;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.4);
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.9);
}

/* --- Layout Principal & Secciones --- */
.main-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem 1.5rem;
}

.section-block {
  margin-bottom: 4rem;
}

.section-header-box {
  margin-bottom: 2rem;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}

/* --- Tarjetas y Contenedores Glassmorphism --- */
.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  margin-bottom: 2rem;
}

.content-card:hover {
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

/* --- Tarjeta Estadística --- */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 5px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stat-label {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.stat-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* --- Tarjeta de Fórmula Matemática --- */
.formula-box {
  background: linear-gradient(135deg, var(--primary-light), var(--bg-card));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  margin: 2rem 0;
  box-shadow: var(--shadow-md);
}

.formula-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.formula-display {
  font-size: 1.5rem;
  overflow-x: auto;
  padding: 1rem 0;
  text-align: center;
  display: flex;
  justify-content: center;
}

.katex-display {
  text-align: center !important;
  margin: 1rem auto !important;
}

.katex-display > .katex {
  display: inline-block !important;
  text-align: center !important;
}

/* --- Listas Estilizadas --- */
.custom-list {
  list-style: none;
  margin: 1.2rem 0;
}

.custom-list li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 0.8rem;
  font-size: 1rem;
}

.custom-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0.1rem;
  width: 1.2rem;
  height: 1.2rem;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 900;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

/* --- Calculadora Interactiva del IID --- */
.calculator-box {
  background: var(--bg-card);
  border: 2px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  margin: 3rem 0;
}

.calc-header {
  text-align: center;
  margin-bottom: 2rem;
}

.calc-header h3 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
}

.slider-group {
  margin-bottom: 1.5rem;
}

.slider-label {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}

.slider-input {
  width: 100%;
  height: 8px;
  border-radius: 5px;
  background: var(--border-color);
  outline: none;
  accent-color: var(--primary);
}

.calc-result-box {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #ffffff;
  border-radius: var(--radius-md);
  padding: 1.8rem;
  text-align: center;
  margin-top: 2rem;
}

.calc-score {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.calc-status {
  font-size: 1.1rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.2);
  display: inline-block;
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
}

/* --- Citas y Fuentes --- */
.source-box {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 1.2rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 2rem;
}

/* --- Pie de Página --- */
.site-footer {
  background: var(--bg-footer);
  color: #94a3b8;
  padding: 4rem 1.5rem 2rem 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-family: var(--font-heading);
  color: #f8fafc;
  font-size: 1.1rem;
  margin-bottom: 1.2rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  color: #94a3b8;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #38bdf8;
  padding-left: 4px;
}

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
}

/* --- Media Queries --- */
@media (max-width: 992px) {
  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card-hover);
    flex-direction: column;
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--border-color);
    clip-path: circle(0% at 100% 0);
    transition: clip-path 0.4s ease-in-out;
  }
  
  .nav-menu.active {
    clip-path: circle(150% at 100% 0);
  }

  .mobile-toggle {
    display: block;
  }
}

@media (max-width: 640px) {
  .accessibility-bar {
    flex-direction: column;
    gap: 0.4rem;
    text-align: center;
  }
  
  .content-card {
    padding: 1.5rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* --- Asistente Analítico Gemini (Drawer Widget) --- */
.gemini-float-btn {
  position: fixed;
  bottom: 1.8rem;
  right: 1.8rem;
  z-index: 999;
  background: linear-gradient(135deg, #0284c7, #059669);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50px;
  padding: 0.8rem 1.4rem;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 10px 25px rgba(2, 132, 199, 0.4);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.gemini-float-btn:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 15px 30px rgba(2, 132, 199, 0.5);
}

.gemini-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  transition: opacity 0.3s ease;
}

.gemini-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 480px;
  height: 100vh;
  background: #0f172a;
  color: #f8fafc;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  transform: translateX(100%);
  transition: transform 0.3s ease-in-out;
  border-left: 1px solid #1e293b;
}

.gemini-drawer.open {
  transform: translateX(0);
}

.gemini-drawer-header {
  background: #020617;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid #1e293b;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gemini-drawer-header h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: #38bdf8;
  margin: 0;
}

.gemini-drawer-close {
  background: #1e293b;
  color: #94a3b8;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
}

.gemini-drawer-close:hover {
  color: #ffffff;
  background: #334155;
}

.gemini-chips-bar {
  background: #0f172a;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #1e293b;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  white-space: nowrap;
}

.gemini-chip {
  background: #1e293b;
  color: #cbd5e1;
  border: 1px solid #334155;
  border-radius: 20px;
  padding: 0.35rem 0.85rem;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.gemini-chip:hover {
  background: #0369a1;
  color: #ffffff;
  border-color: #38bdf8;
}

.gemini-chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  background: rgba(15, 23, 42, 0.6);
}

.gemini-msg {
  max-width: 88%;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  font-size: 0.85rem;
  line-height: 1.5;
}

.gemini-msg.assistant {
  align-self: flex-start;
  background: #1e293b;
  color: #f1f5f9;
  border: 1px solid #334155;
  border-bottom-left-radius: 2px;
}

.gemini-msg.user {
  align-self: flex-end;
  background: #0284c7;
  color: #ffffff;
  border-bottom-right-radius: 2px;
}

.gemini-input-footer {
  padding: 1rem;
  background: #020617;
  border-top: 1px solid #1e293b;
  display: flex;
  gap: 0.6rem;
}

.gemini-input-footer input {
  flex: 1;
  background: #0f172a;
  border: 1px solid #334155;
  color: #ffffff;
  padding: 0.7rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
}

.gemini-input-footer input:focus {
  outline: none;
  border-color: #38bdf8;
}

.gemini-input-footer button {
  background: #0284c7;
  color: #ffffff;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: 10px;
  font-weight: bold;
  cursor: pointer;
}

.gemini-input-footer button:hover {
  background: #0369a1;
}