/*
 * Modern Homepage Styles for Tecnología Informática
 * State-of-the-art design with gradients, shadows, and smooth animations
 */

/* ================================
   CSS VARIABLES & DESIGN TOKENS
================================ */
:root {
  /* Primary Colors */
  --color-primary: #667eea;
  --color-secondary: #764ba2;
  --color-accent: #00d4ff;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-hero: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
  --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.65) 100%);
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.15);
  
  /* Spacing */
  --space-xs: 0.5rem;   /* 8px */
  --space-sm: 0.75rem;  /* 12px */
  --space-md: 1rem;     /* 16px */
  --space-lg: 1.5rem;   /* 24px */
  --space-xl: 2rem;     /* 32px */
  --space-2xl: 3rem;    /* 48px */
  --space-3xl: 4rem;    /* 64px */
  --space-4xl: 6rem;    /* 96px */
  
  /* Typography */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */
  --font-size-6xl: 4rem;     /* 64px */
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;
  
  /* Border Radius */
  --radius-sm: 0.375rem;  /* 6px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: all 0.15s ease-out;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Z-index */
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-modal-backdrop: 40;
  --z-modal: 50;
  --z-popover: 60;
  --z-tooltip: 70;
  --z-toast: 80;
}

/* ================================
   RESET & BASE STYLES
================================ */
* {
  box-sizing: border-box;
}

.modern-homepage {
  font-family: var(--font-family-primary);
  line-height: var(--line-height-normal);
  color: var(--color-gray-800);
  background: var(--color-white);
}

/* ================================
   HERO SECTION
================================ */
.hero-section {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
  margin-bottom: var(--space-4xl);
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-overlay);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
  color: var(--color-white);
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.2) 100%);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.hero-category {
  display: inline-block;
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-lg);
  transition: var(--transition-smooth);
}

.hero-category:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.hero-title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-lg);
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.8), 0 2px 4px rgba(0, 0, 0, 0.9);
  color: var(--color-white);
}

.hero-excerpt {
  font-size: var(--font-size-xl);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-2xl);
  opacity: 0.95;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
  color: var(--color-white);
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
  font-size: var(--font-size-sm);
  opacity: 0.9;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
  color: var(--color-white);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--space-md) var(--space-2xl);
  border-radius: var(--radius-full);
  font-size: var(--font-size-lg);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-lg);
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
  color: var(--color-white);
  text-decoration: none;
}

.hero-cta::after {
  content: '→';
  font-size: var(--font-size-xl);
  transition: var(--transition-smooth);
}

.hero-cta:hover::after {
  transform: translateX(4px);
}

/* ================================
   SECTION CONTAINER
================================ */
.section {
  padding: var(--space-4xl) 0;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-md);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--line-height-relaxed);
}

/* ================================
   ARTICLE CARDS
================================ */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.article-card {
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition-smooth);
  position: relative;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.article-card-image {
  position: relative;
  height: 240px;
  overflow: hidden;
}

.article-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.article-card:hover .article-card-image img {
  transform: scale(1.05);
}

.article-card-category {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 2;
}

.article-card-content {
  padding: var(--space-xl);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.article-card-title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
  color: var(--color-gray-900);
}

.article-card-title a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

.article-card-title a:hover {
  color: var(--color-primary);
}

.article-card-excerpt {
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-gray-200);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.article-card-date {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.article-card-read-time {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* ================================
   FEATURED ARTICLES ROW
================================ */
.featured-articles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-4xl);
}

.featured-card {
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition-smooth);
  display: flex;
  height: 280px;
}

.featured-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.featured-card-image {
  flex: 0 0 45%;
  position: relative;
  overflow: hidden;
}

.featured-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.featured-card:hover .featured-card-image img {
  transform: scale(1.05);
}

.featured-card-content {
  flex: 1;
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.featured-card-category {
  display: inline-block;
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-md);
  align-self: flex-start;
}

.featured-card-title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-sm);
  color: var(--color-gray-900);
}

.featured-card-title a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

.featured-card-title a:hover {
  color: var(--color-primary);
}

.featured-card-excerpt {
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
}

.featured-card-meta {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ================================
   NEWSLETTER SECTION
================================ */
.newsletter-section {
  background: var(--gradient-primary);
  color: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-4xl) var(--space-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.newsletter-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  transform: rotate(-45deg);
  pointer-events: none;
}

.newsletter-title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 2;
}

.newsletter-description {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  position: relative;
  z-index: 2;
}

.newsletter-form {
  max-width: 500px;
  margin: 0 auto;
  display: flex;
  gap: var(--space-md);
  position: relative;
  z-index: 2;
}

.newsletter-input {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  background: var(--color-white);
  color: var(--color-gray-800);
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
}

.newsletter-input:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.newsletter-button {
  background: var(--color-gray-900);
  color: var(--color-white);
  border: none;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

.newsletter-button:hover {
  background: var(--color-gray-800);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ================================
   UTILITY CLASSES
================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition-smooth);
}

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

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-full);
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--color-white);
  text-decoration: none;
}

/* ================================
   RESPONSIVE DESIGN
================================ */

/* Tablet */
@media (max-width: 1023px) {
  :root {
    --space-4xl: 3rem;
    --space-3xl: 2.5rem;
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-excerpt {
    font-size: var(--font-size-lg);
  }
  
  .section-title {
    font-size: var(--font-size-3xl);
  }
  
  .articles-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
  
  .featured-articles {
    grid-template-columns: 1fr;
  }
  
  .featured-card {
    flex-direction: column;
    height: auto;
  }
  
  .featured-card-image {
    flex: none;
    height: 200px;
  }
}

/* Mobile */
@media (max-width: 767px) {
  :root {
    --space-lg: 1rem;
    --space-xl: 1.25rem;
    --space-2xl: 1.5rem;
    --space-3xl: 2rem;
    --space-4xl: 2.5rem;
  }
  
  .hero-section {
    min-height: 60vh;
    margin-bottom: var(--space-3xl);
  }
  
  .hero-content {
    padding: var(--space-xl) var(--space-md);
    margin: var(--space-md);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-excerpt {
    font-size: var(--font-size-base);
  }
  
  .hero-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  
  .hero-cta {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .featured-articles {
    gap: var(--space-lg);
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .newsletter-title {
    font-size: var(--font-size-2xl);
  }
  
  .newsletter-section {
    padding: var(--space-2xl) var(--space-lg);
  }
}

/* Small mobile */
@media (max-width: 480px) {
  .hero-content,
  .section-container {
    padding: 0 var(--space-md);
  }
  
  .article-card-content,
  .featured-card-content {
    padding: var(--space-lg);
  }
  
  .newsletter-section {
    border-radius: var(--radius-lg);
  }
}