:root {
  /* Colors - Dark Theme Corporativo */
  --bg-dark: #070B14; /* Azul medianoche muy oscuro */
  --bg-card: #0F1626; /* Azul profundo para tarjetas */
  --bg-glass: rgba(15, 22, 38, 0.7); /* Glassmorphism oscuro */
  --bg-glass-hover: rgba(15, 22, 38, 0.9);
  
  --primary-gold: #D4AF37; /* Oro corporativo */
  --primary-gold-hover: #b8972e;
  --accent-blue: #1A365D; /* Azul corporativo */
  --accent-blue-light: #2B6CB0;
  
  --text-main: #E2E8F0; /* Gris muy claro para legibilidad */
  --text-muted: #A0AEC0; /* Gris medio para textos secundarios */
  --text-dark: #1A202C; /* Texto oscuro para contrastes sobre botones claros */
  
  --error-color: #E53E3E;
  --success-color: #38A169;

  /* Typography */
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Playfair Display', serif;

  /* Layout */
  --container-width: 1200px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Borders & Shadows */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-light: rgba(255, 255, 255, 0.1);
  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.4);
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* =========================================
   RESET & BASE 
   ========================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: #FFFFFF;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
p { margin-bottom: var(--spacing-sm); }
a { color: var(--primary-gold); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--primary-gold-hover); }
img { max-width: 100%; height: auto; display: block; }

/* =========================================
   LAYOUT UTILITIES 
   ========================================= */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-light { background-color: var(--bg-card); }
.section-dark { background-color: var(--bg-dark); }

.text-center { text-align: center; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* =========================================
   COMPONENTS
   ========================================= */
/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
}

.btn-primary {
  background-color: var(--primary-gold);
  color: var(--text-dark);
}
.btn-primary:hover {
  background-color: var(--primary-gold-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-light);
}
.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--primary-gold);
}

.btn-outline-gold {
  background-color: transparent;
  color: var(--primary-gold);
  border: 1px solid var(--primary-gold);
}
.btn-outline-gold:hover {
  background-color: var(--primary-gold);
  color: var(--text-dark);
}

/* Glassmorphism Classes */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-light);
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(212, 175, 55, 0.3);
}

/* =========================================
   HEADER & NAVIGATION 
   ========================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all var(--transition-normal);
  padding: 1rem 0;
}

.header.scrolled {
  padding: 0.5rem 0;
  background: rgba(7, 11, 20, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container img {
  height: 50px; /* Ajustar según logo real */
  transition: height var(--transition-normal);
}

.header.scrolled .logo-container img {
  height: 40px;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-gold);
  transition: width var(--transition-normal);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover {
  color: var(--primary-gold);
}

/* Dropdown Menu */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-sm);
  min-width: 250px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
  padding: 0.5rem 0;
  list-style: none;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li a {
  display: block;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

.dropdown-menu li a::after {
  display: none;
}

.dropdown-menu li a:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

/* Hamburger Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 30px;
  height: 20px;
  position: relative;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  position: absolute;
  left: 0;
  transition: all var(--transition-normal);
}

.menu-toggle span:nth-child(1) { top: 0; }
.menu-toggle span:nth-child(2) { top: 9px; }
.menu-toggle span:nth-child(3) { top: 18px; }

.menu-toggle.active span:nth-child(1) {
  top: 9px;
  transform: rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  top: 9px;
  transform: rotate(-45deg);
}

/* Mobile Nav */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100vh;
  background-color: var(--bg-card);
  z-index: 1000;
  padding: 5rem 2rem;
  transition: right var(--transition-normal);
  box-shadow: -5px 0 15px rgba(0,0,0,0.5);
  overflow-y: auto;
}

.mobile-nav.active {
  right: 0;
}

.mobile-nav .nav-links {
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}

.mobile-nav .dropdown-menu {
  position: static;
  opacity: 1;
  visibility: visible;
  transform: none;
  box-shadow: none;
  border: none;
  background: rgba(0,0,0,0.2);
  margin-top: 0.5rem;
  display: none;
}

.mobile-nav .dropdown.active .dropdown-menu {
  display: block;
}

/* =========================================
   FOOTER
   ========================================= */
.footer {
  background-color: #03060a;
  padding: var(--spacing-xl) 0 var(--spacing-md);
  border-top: 1px solid var(--border-light);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: var(--primary-gold);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.75rem;
}

.footer-col ul li a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-col ul li a:hover {
  color: var(--primary-gold);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-light);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* =========================================
   ANIMATIONS (Intersection Observer)
   ========================================= */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* =========================================
   RESPONSIVE DESIGN
   ========================================= */
@media (max-width: 992px) {
  .header .nav-links { display: none; }
  .header .btn-primary { display: none; }
  .menu-toggle { display: block; }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
}

@media (max-width: 768px) {
  .section { padding: var(--spacing-lg) 0; }
  .footer-grid { grid-template-columns: 1fr; }
}