:root {
  /* Green palette */
  --primary-green: #2d5a3d;
  --secondary-green: #4a8159;
  --light-green: #7fb892;
  --accent-green: #a8d5ba;
  --pale-green: #e8f5e9;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #2d5a3d 0%, #4a8159 100%);
  --gradient-light: linear-gradient(135deg, #7fb892 0%, #a8d5ba 100%);
  --gradient-hero: linear-gradient(135deg, rgba(45, 90, 61, 0.85) 0%, rgba(74, 129, 89, 0.8) 100%);

  /* Neutral colors */
  --text-dark: #2c3e50;
  --text-medium: #37474f; /* Darkened for better contrast */
  --text-light: #455a64;  /* Darkened for better contrast */
  --white: #ffffff;
  --off-white: #f8f9fa;
  --border-color: #e0e0e0;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;

  /* Typography */
  --font-primary: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-heading: 'Inter', 'Segoe UI', sans-serif;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(45, 90, 61, 0.08);
  --shadow-md: 0 4px 12px rgba(45, 90, 61, 0.12);
  --shadow-lg: 0 8px 24px rgba(45, 90, 61, 0.16);
  --shadow-hover: 0 12px 32px rgba(45, 90, 61, 0.2);

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

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

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  color: var(--text-dark);
  line-height: 1.7;
  background-color: var(--off-white);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

figure {
  margin: 0 0 var(--spacing-md) 0;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--primary-green);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-medium);
}

a {
  color: var(--secondary-green);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-green);
}

/* Header */
header {
  background: var(--gradient-primary);
  color: var(--white);
  padding: var(--spacing-md) 0;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo h1 {
  color: var(--white);
  font-size: 1.8rem;
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.logo-icon {
  font-size: 2rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
}

nav a {
  color: var(--white);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

nav a:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--white);
}

/* Hero Section */
.hero {
  background: var(--gradient-hero), url('images/banner-alimentacion-saludable-hero.webp');
  background-size: cover;
  background-position: center;
  color: var(--white);
  padding: var(--spacing-xxl) var(--spacing-md);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(168, 213, 186, 0.1) 0%, transparent 50%);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: var(--white);
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero p {
  font-size: 1.25rem;
  color: var(--pale-green);
  margin-bottom: var(--spacing-lg);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

/* Category Grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.category-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-medium);
  cursor: pointer;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-light);
  transform: scaleX(0);
  transition: transform var(--transition-medium);
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-green);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.category-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.category-card h3 {
  color: var(--primary-green);
  margin-bottom: var(--spacing-sm);
}

.category-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

.category-card .article-count {
  display: inline-block;
  margin-top: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--pale-green);
  color: var(--primary-green);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
}

/* Article Cards */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.article-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-medium);
  border: 1px solid var(--border-color);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--light-green);
}

.article-card-header {
  background: var(--gradient-light);
  padding: var(--spacing-md);
  color: var(--white);
}

.article-card-body {
  padding: var(--spacing-md);
}

.article-card h3 {
  margin-bottom: var(--spacing-xs);
  font-size: 1.25rem;
}

.article-card .category-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.article-card .excerpt {
  color: var(--text-medium);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--secondary-green);
  font-weight: 600;
  transition: gap var(--transition-fast);
}

.read-more:hover {
  gap: var(--spacing-sm);
}

/* Article Content */
.article-content {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  margin: var(--spacing-xl) 0;
}

.article-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--pale-green);
}

.article-header h1 {
  color: var(--primary-green);
  margin-bottom: var(--spacing-sm);
}

.article-meta {
  display: flex;
  gap: var(--spacing-md);
  color: var(--text-light);
  font-size: 0.9rem;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-body h2 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.article-body ul,
.article-body ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.article-body li {
  margin-bottom: var(--spacing-xs);
  color: var(--text-medium);
}

.article-body strong {
  color: var(--primary-green);
  font-weight: 600;
}

/* Amazon Link Section */
.amazon-section {
  background: linear-gradient(135deg, var(--pale-green) 0%, #d4edda 100%);
  border-left: 4px solid var(--secondary-green);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-xl) 0;
}

.amazon-section h3 {
  color: var(--primary-green);
  margin-bottom: var(--spacing-sm);
}

.amazon-button {
  display: inline-block;
  background: var(--gradient-primary);
  color: var(--white);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-medium);
  box-shadow: var(--shadow-sm);
}

.amazon-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--white);
}

/* Related Articles */
.related-articles {
  margin-top: var(--spacing-xxl);
  padding-top: var(--spacing-xl);
  border-top: 2px solid var(--pale-green);
}

.related-articles h2 {
  margin-bottom: var(--spacing-lg);
}

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

.related-link {
  display: block;
  padding: var(--spacing-md);
  background: var(--pale-green);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.related-link:hover {
  background: var(--accent-green);
  border-color: var(--secondary-green);
  transform: translateX(4px);
}

.related-link h4 {
  color: var(--primary-green);
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
}

.related-link p {
  font-size: 0.875rem;
  color: var(--text-medium);
}

/* Footer */
footer {
  background: var(--primary-green);
  color: var(--white);
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-xxl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

footer p {
  color: var(--accent-green);
}

/* Breadcrumbs */
.breadcrumbs {
  margin-bottom: var(--spacing-lg);
  font-size: 0.9rem;
}

.breadcrumbs a {
  color: var(--text-light);
}

.breadcrumbs a:hover {
  color: var(--secondary-green);
}

.breadcrumbs span {
  margin: 0 var(--spacing-xs);
  color: var(--text-light);
}

/* Responsive Design */
/* Responsive Design */
@media (max-width: 768px) {
  :root {
    /* Adjust spacing variables for mobile */
    --spacing-xl: 2rem;
    --spacing-xxl: 2.5rem;
    --spacing-lg: 1.5rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  header {
    padding: 0.5rem 0;
    /* Minimal vertical padding */
  }

  nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.25rem;
    /* Even tighter spacing */
    justify-content: center;
    width: 100%;
    margin-top: 0.25rem;
    /* Reduced top margin */
  }

  nav a {
    display: inline-block;
    width: auto;
    /* Natural width */
    text-align: center;
    padding: 0.4rem 0.8rem;
    /* Smaller padding */
    font-size: 0.95rem;
    /* Slightly smaller font */
    background: rgba(255, 255, 255, 0.1);
    /* Subtle background for buttons */
    border-radius: 20px;
    /* Pill shape */
  }

  .header-container {
    flex-direction: column;
    gap: 0.5rem;
    /* Reduced gap between logo and nav */
    padding-bottom: 0.5rem;
  }

  .category-grid,
  .article-grid,
  .related-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  h1 {
    font-size: 1.75rem;
  }

  /* Slightly smaller for mobile */
  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .article-content {
    padding: var(--spacing-md);
    /* Reduced padding for more content space */
  }

  .article-body ul,
  .article-body ol {
    margin-left: 1.2rem;
  }

  .container {
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.p-lg {
  padding: var(--spacing-lg);
}

/* Article Card Image */
.article-card-image {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}