/* 
  CDIF4EOSC Microsite Design System
  Theme: The Scholarly Luminary
*/

@import url('https://fonts.googleapis.com/css2?family=Public+Sans:wght@300;400;700&family=Inter:wght@400;500;700&display=swap');

:root {
  /* Colors */
  --color-primary: #000628;
  --color-primary-container: #00195E;
  --color-secondary: #00639a;
  --color-secondary-container: #43b0ff;
  --color-surface: #fbf9f8;
  --color-surface-container-low: #f5f3f3;
  --color-surface-container-high: #e9e8e7;
  --color-surface-container-highest: #e4e2e2;
  --color-on-surface: #1b1c1c;
  --color-on-primary: #ffffff;
  
  /* Typography */
  --font-display: 'Public Sans', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Spacing */
  --spacing-unit: 8px;
  --spacing-sm: calc(var(--spacing-unit) * 2);
  --spacing-md: calc(var(--spacing-unit) * 4);
  --spacing-lg: calc(var(--spacing-unit) * 8);
  --spacing-xl: calc(var(--spacing-unit) * 12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  background-color: var(--color-surface);
  background-image: 
    linear-gradient(to right, rgba(0, 6, 40, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 6, 40, 0.02) 1px, transparent 1px),
    radial-gradient(circle, rgba(0, 6, 40, 0.05) 1px, transparent 1px);
  background-size: 100px 100px, 100px 100px, 20px 20px;
  background-attachment: fixed;
  color: var(--color-on-surface);
  line-height: 1.6;
}

/* Typography Scale */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  margin-top: 0;
}

.subtitle {
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--color-secondary);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  display: block;
}

h1 {
  font-size: 3.5rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-sm);
}

h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

p {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
  max-width: 70ch;
  color: #444;
}

.lead {
  font-size: 1.25rem;
  color: var(--color-secondary);
  font-weight: 400;
  max-width: 600px;
}

/* Drop Cap */
.drop-cap::first-letter {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  float: left;
  line-height: 0.8;
  padding-right: 12px;
  color: var(--color-primary);
}

/* Layout Patterns */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.main-header {
  padding: var(--spacing-sm) 0;
  background: white;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

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

.logo-area {
  display: flex;
  align-items: center;
}

.site-logo {
  height: 48px;
  width: auto;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.partner-logo {
  height: 32px;
  width: auto;
}

.btn-sm {
  font-size: 0.85rem;
  padding: 8px 20px;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-links a {
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

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

/* Nav Toggle Fix */
.nav-toggle {
  display: none !important;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  padding: 10px;
  z-index: 1001;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  background: var(--color-primary);
  height: 2px;
  width: 24px;
  position: relative;
  transition: all 0.3s ease;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: "";
  position: absolute;
}

.nav-toggle-label span::before { bottom: 7px; }
.nav-toggle-label span::after { top: 7px; }

/* Sections */
section {
  padding: var(--spacing-xl) 0;
}

.section-dark {
  background-color: var(--color-primary);
  color: white;
  padding: var(--spacing-lg) 0;
}

.section-dark h2 {
  color: white;
}

.hero {
  padding: var(--spacing-lg) 0 var(--spacing-md);
  position: relative;
  overflow: hidden;
}

/* Specific Layouts */
.content-grid {
  display: grid;
  grid-template-columns: 2fr 1.2fr;
  gap: var(--spacing-xl);
}

@media (max-width: 992px) {
  .content-grid {
    grid-template-columns: 1fr;
  }
}

/* Callout Box */
.callout-box {
  background-color: #f1f3f5;
  padding: var(--spacing-lg);
  border-left: 4px solid var(--color-secondary);
  margin: var(--spacing-lg) 0;
  border-radius: 0 8px 8px 0;
}

.callout-box h4 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

/* Sidebar List */
.sidebar-list {
  background: var(--color-surface-container-low);
  padding: var(--spacing-md);
  border-radius: 16px;
  height: fit-content;
}

.sidebar-list h3 {
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--spacing-md);
}

.sidebar-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-list li {
  margin-bottom: var(--spacing-md);
}

.sidebar-list li strong {
  display: block;
  font-size: 1rem;
  color: var(--color-primary);
}

.sidebar-list li span {
  font-size: 0.8rem;
  color: #888;
}

.sidebar-list a {
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 600;
  transition: color 0.2s ease;
}

.sidebar-list a:hover {
  color: var(--color-secondary);
}

/* WP Cards */
.wp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.wp-card {
  background: rgba(255, 255, 255, 0.03);
  padding: var(--spacing-md);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 160px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.wp-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-8px);
  border-color: var(--color-secondary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.wp-number {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-secondary);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  display: block;
}

.wp-card h4 {
  color: white;
  font-size: 1.05rem;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
  font-weight: 600;
}

.wp-card p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  margin-top: auto;
}

.wp-card p strong {
  color: var(--color-secondary);
}

/* Stats Card (Floating) */
.stats-card-wrapper {
  margin-top: -100px;
  position: relative;
  z-index: 10;
}

.stats-card {
  background: white;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
  border-radius: 12px;
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-around;
  text-align: center;
}

.stat-item {
  flex: 1;
  padding: var(--spacing-md);
  border-right: 1px solid #f0f0f0;
}

.stat-item:last-child {
  border-right: none;
}

.stat-icon {
  font-size: 1.5rem;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
  display: block;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  display: block;
}

.stat-label {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: #888;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-container));
  color: var(--color-on-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* Glassmorphism */
.nav-sticky {
  position: sticky;
  top: 0;
  background: rgba(251, 249, 248, 0.8);
  backdrop-filter: blur(12px);
  z-index: 1000;
  padding: var(--spacing-sm) 0;
}

/* Asymmetry helpers */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

@media (max-width: 1024px) {
  :root {
    --spacing-xxl: 60px;
    --spacing-xl: 40px;
  }

  .content-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .hero .container > div {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-xl);
  }

  .hero img {
    max-width: 80%;
    margin: 0 auto;
  }

  footer .container > div {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle-label {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 80%;
    height: 100vh;
    background: white;
    flex-direction: column;
    padding: 80px var(--spacing-lg);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    z-index: 1000;
  }

  .nav-links a {
    font-size: 1.25rem;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid #f0f0f0;
  }

  .nav-toggle:checked ~ .nav-links {
    transform: translateX(0);
  }

  .nav-toggle:checked ~ .nav-toggle-label span {
    background: transparent;
  }

  .nav-toggle:checked ~ .nav-toggle-label span::before {
    transform: rotate(45deg);
    bottom: 0;
  }

  .nav-toggle:checked ~ .nav-toggle-label span::after {
    transform: rotate(-45deg);
    top: 0;
  }

  .header-actions {
    display: none;
  }

  .header-content {
    justify-content: space-between;
  }

  .stats-card {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .stat-item {
    border-right: none;
    border-bottom: 1px solid #f0f0f0;
  }

  .stat-item:last-child {
    border-bottom: none;
  }

  .wp-grid {
    grid-template-columns: 1fr;
  }

  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  
  .hero {
    padding: var(--spacing-xl) 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .sidebar-list ul {
    grid-template-columns: 1fr;
  }
  
  .stats-card-wrapper {
    margin-top: var(--spacing-md);
  }
}