:root {
  --primary-color: #3b82f6; /* A strong, modern blue */
  --primary-color-dark: #2563eb;
  --secondary-color: #1f2937; /* Dark cool gray */
  --background-color: #0b121a; /* Very dark blue, almost black */
  --surface-color: #111827; /* Dark gray for cards */
  --text-color: #e5e7eb; /* Light gray for readability */
  --text-muted: #9ca3af; /* Muted gray for subtitles */
  --border-color: #374151;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-family-headings: 'Lexend', var(--font-family);
  --header-height: 80px;
  --border-radius: 12px;
}

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

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

body {
  font-family: var(--font-family);
  color: var(--text-color);
  background-color: var(--background-color);
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-headings);
  font-weight: 600;
  line-height: 1.3;
  color: #f9fafb;
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
h2 { font-size: clamp(2rem, 5vw, 3rem); }
h3 { font-size: clamp(1.25rem, 4vw, 1.75rem); }
h4 { font-size: 1.1rem; }

p { margin-bottom: 1rem; color: var(--text-muted); }
a { color: var(--primary-color); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--primary-color-dark); text-decoration: underline; }
ul, ol { list-style-position: inside; padding-left: 1rem; }
img { max-width: 100%; height: auto; display: block; border-radius: var(--border-radius); }

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 24px;
}

.section {
  padding: clamp(60px, 10vh, 100px) 0;
}

.section-title { text-align: center; margin-bottom: 1.5rem; }
.section-subtitle { text-align: center; max-width: 700px; margin: 0 auto 3rem auto; font-size: 1.1rem; color: var(--text-muted); }

/* Header */
.main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(11, 18, 26, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}
.main-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  color: #f9fafb;
}
.logo:hover { text-decoration: none; color: var(--primary-color); }

.main-nav { display: none; }
.nav-links { list-style: none; display: flex; gap: 32px; padding: 0; }
.nav-links a { color: var(--text-color); font-weight: 500; text-decoration: none; }
.nav-links a.active, .nav-links a:hover { color: var(--primary-color); }
.header-cta { display: none; }

.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
}
.menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--text-color);
  transition: all 0.3s ease-in-out;
}

/* Mobile Nav Styles */
.main-nav.is-open {
  display: block;
  position: absolute;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
}
.main-nav.is-open .nav-links {
  flex-direction: column;
  align-items: center;
  gap: 0;
}
.main-nav.is-open .nav-links li { width: 100%; }
.main-nav.is-open .nav-links a {
  display: block;
  padding: 1rem;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}
.main-nav.is-open .nav-links li:last-child a { border-bottom: none; }


/* Hero Section */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
  text-align: center;
  padding: 40px 20px;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--background-color) 0%, rgba(11, 18, 26, 0.4) 100%);
}
.hero-content { position: relative; z-index: 1; color: white; max-width: 800px; }
.hero-title { margin-bottom: 1rem; color: white; }
.hero-subtitle { font-size: clamp(1.1rem, 3vw, 1.5rem); color: #d1d5db; margin-bottom: 2rem; }

/* Buttons */
.cta-button {
  display: inline-block;
  padding: 14px 28px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}
.cta-button:hover { background-color: var(--primary-color-dark); transform: translateY(-2px); }
.cta-button.secondary {
  background-color: transparent;
  border-color: var(--primary-color);
  color: var(--primary-color);
}
.cta-button.secondary:hover { background-color: var(--primary-color); color: white; }

.link-arrow {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.link-arrow::after {
  content: '→';
  transition: transform 0.3s ease;
}
.link-arrow:hover::after {
  transform: translateX(5px);
}

/* Cards */
.card {
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}
.card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.2); }
.card-content { padding: 24px; }
.card-content h3 { margin-bottom: 1rem; color: #f9fafb;}

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

/* Featured Topics */
.topics-overview-section { background-color: var(--surface-color); }
.topics-grid { display: grid; grid-template-columns: 1fr; gap: 30px; margin-bottom: 3rem; }
.topic-item {
    text-align: center;
    padding: 24px;
    background: var(--background-color);
    border-radius: var(--border-radius);
}
.topic-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.topic-item h4 { margin-bottom: 0.5rem; color: #f9fafb; font-size: 1.25rem; }
.section-cta { text-align: center; }

/* About Preview */
.about-preview-section .content-image-split { align-items: center; }

/* Content-Image Split */
.content-image-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: flex-start;
}
.cis-image img { width: 100%; height: 100%; object-fit: cover; }
.cis-content h2 { margin-bottom: 1.5rem; text-align: left; }

/* Contributors Preview */
.contributors-preview { background-color: var(--surface-color); }
.contributors-gallery { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin-bottom: 3rem; }
.contributor-photo img { width: 100px; height: 100px; border-radius: 50%; object-fit: cover; border: 3px solid var(--border-color); }

/* Final CTA */
.final-cta-section { background: linear-gradient(45deg, var(--primary-color), var(--primary-color-dark)); text-align: center; }
.final-cta-section h2, .final-cta-section p { color: white; }
.final-cta-section .cta-button { background: white; color: var(--primary-color); }
.final-cta-section .cta-button:hover { background: #e5e7eb; }

/* Footer */
.main-footer {
  background-color: var(--surface-color);
  padding: 60px 0 0;
  border-top: 1px solid var(--border-color);
}
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 40px; margin-bottom: 40px; }
.footer-column h4 { font-size: 1.1rem; color: #f9fafb; margin-bottom: 1rem; }
.footer-column ul { list-style: none; padding: 0; }
.footer-column ul li { margin-bottom: 0.75rem; }
.footer-column ul a { color: var(--text-muted); }
.footer-column ul a:hover { color: var(--primary-color); text-decoration: none; }
.email-link { font-weight: 500; }
.footer-bottom { border-top: 1px solid var(--border-color); padding: 20px 0; text-align: center; margin-top: 40px; }
.footer-bottom p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

/* Page-specific styles */
.page-hero { padding: 60px 0; text-align: center; background-color: var(--surface-color); }
.page-title { margin-bottom: 0.5rem; }
.page-subtitle { font-size: 1.25rem; color: var(--text-muted); margin: 0; }

.full-page-grid { grid-template-columns: 1fr; }

.feature-boxes .grid-3 { display: grid; gap: 30px; grid-template-columns: 1fr; }
.feature-card { text-align: center; }
.feature-icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
.feature-card h3 { font-size: 1.5rem; }

.topics-page-grid { display: grid; grid-template-columns: 1fr; gap: 30px; }
.topic-card .card-content { display: flex; flex-direction: column; height: 100%; }
.topic-card p { flex-grow: 1; }

.contributors-grid { display: grid; grid-template-columns: 1fr; gap: 30px; }
.contributor-card img { height: 250px; object-fit: cover; border-radius: 12px 12px 0 0; }

/* Contact page */
.contact-layout { display: grid; grid-template-columns: 1fr; gap: 60px; }
.contact-form-container, .contact-info-container { width: 100%; }
.contact-form-container h2, .contact-info-container h2 { text-align: left; }
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; color: #d1d5db; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 12px;
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-color);
  font-size: 1rem;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.5); }
.contact-info-item { margin-bottom: 2rem; }
.contact-icon { font-size: 1.5rem; float: left; margin-right: 15px; }
.contact-info-item h4 { margin-bottom: 0.25rem; }

.map-section { background-color: var(--surface-color); }
.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
}
.map-container iframe { width: 100%; height: 100%; border: none;}

/* Thank you page */
.thank-you-section { text-align: center; min-height: 60vh; display: flex; flex-direction: column; justify-content: center; align-items: center; }
.thank-you-icon { width: 80px; height: 80px; background: var(--primary-color); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 30px; }
.thank-you-icon svg { width: 40px; height: 40px; color: white; }
.thank-you-section p { max-width: 600px; }
.thank-you-section .cta-button { margin-top: 20px; }

/* Privacy page */
.legal-content h2 { margin-top: 2.5rem; margin-bottom: 1rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; }
.legal-content h2:first-of-type { margin-top: 0; }
.legal-content ul { margin-bottom: 1rem; }
.legal-content li { margin-bottom: 0.5rem; }

/* Disclaimer */
.disclaimer-section {
  background-color: rgba(0,0,0,0.2);
  color: var(--text-muted);
  padding: 20px 30px;
  margin: 40px 0 0 0;
  border-radius: var(--border-radius);
  text-align: center;
  font-size: 14px;
  line-height: 1.6;
  border: 1px solid var(--border-color);
}
.disclaimer-section strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text-color);
}
.disclaimer-section p { margin: 0; }

/* Cookie Banner */
#cookie-banner {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--surface-color);
  padding: 20px;
  border-top: 1px solid var(--border-color);
  z-index: 9999;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  text-align: center;
}
#cookie-banner p { margin: 0; }
.cookie-buttons { display: flex; gap: 15px; }
#cookie-banner button {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  background-color: var(--primary-color);
  color: white;
  transition: background-color 0.3s ease;
}
#cookie-banner button.decline {
  background-color: var(--border-color);
  color: var(--text-color);
}
#cookie-banner button:hover { background-color: var(--primary-color-dark); }
#cookie-banner button.decline:hover { background-color: #4b5563; }

/* Responsive Media Queries */

@media (min-width: 768px) {
  h1 { font-size: 4rem; }
  h2 { font-size: 3rem; }
  
  .menu-toggle { display: none; }
  .main-nav { display: block; }
  .header-cta { display: inline-block; }
  
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .full-page-grid {
      grid-template-columns: repeat(2, 1fr);
  }
  .topics-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-boxes .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .topics-page-grid { grid-template-columns: repeat(2, 1fr); }
  .contributors-grid { grid-template-columns: repeat(2, 1fr); }

  .content-image-split { 
    grid-template-columns: 1fr 1fr;
    gap: 60px;
  }
  .content-image-split.reverse .cis-image { grid-column: 1; grid-row: 1; }
  .content-image-split.reverse .cis-content { grid-column: 2; }
  
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1.5fr; }
  .contact-layout { grid-template-columns: 2fr 1fr; }
  #cookie-banner { flex-direction: row; justify-content: space-between; text-align: left; }
}

@media (min-width: 1024px) {
    .articles-grid { grid-template-columns: repeat(3, 1fr); }
    .full-page-grid { grid-template-columns: repeat(3, 1fr); }
    .topics-grid { grid-template-columns: repeat(4, 1fr); }
    .topics-page-grid { grid-template-columns: repeat(3, 1fr); }
    .contributors-grid { grid-template-columns: repeat(3, 1fr); }
}