/* ============================================
   UQARIN - Institutional Knowledge Portal
   Color Palette & Typography System
   ============================================ */

:root {
  --primary: #1A3B4F;
  --secondary: #5C7B8E;
  --light-gray: #D0D4D9;
  --soft-blue-gray: #9FB4C4;
  --white: #FFFFFF;
  --black: #000000;
  --text-dark: #2C2C2C;
  --text-light: #666666;
  --border-color: #D0D4D9;
  
  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-64: 64px;
  --spacing-128: 128px;
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Open Sans', 'Roboto', sans-serif;
  background-color: var(--light-gray);
  color: var(--text-dark);
  line-height: 1.6;
  font-size: 16px;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', 'Lato', sans-serif;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.5px;
  color: var(--primary);
}

h1 {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: 1px;
  margin: var(--spacing-32) 0 var(--spacing-24) 0;
  line-height: 1.2;
}

h2 {
  font-size: 36px;
  font-weight: 700;
  margin: var(--spacing-24) 0 var(--spacing-16) 0;
}

h3 {
  font-size: 24px;
  font-weight: 600;
  margin: var(--spacing-16) 0 var(--spacing-16) 0;
}

p {
  margin-bottom: var(--spacing-16);
  color: var(--text-dark);
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--secondary);
  text-decoration: none;
  transition: color 0.3s ease-in-out;
}

a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* ============================================
   LAYOUT & CONTAINER
   ============================================ */

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-32);
}

section {
  padding: var(--spacing-128) var(--spacing-32);
}

.section-full {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

header {
  background-color: var(--white);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(26, 59, 79, 0.08);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-16) var(--spacing-32);
  max-width: 1440px;
  margin: 0 auto;
}

.logo {
  font-family: 'Montserrat', sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.5px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-24);
}

nav a {
  color: var(--text-dark);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.3s ease-in-out;
}

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

body {
  padding-top: 64px;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  text-align: center;
  padding: var(--spacing-64) var(--spacing-32);
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero h1 {
  color: var(--white);
  font-size: 56px;
  margin-bottom: var(--spacing-24);
}

.hero p {
  color: var(--light-gray);
  font-size: 20px;
  max-width: 800px;
  margin: 0 auto;
}

/* ============================================
   CONTENT SECTIONS
   ============================================ */

.section-content {
  background-color: var(--white);
  padding: var(--spacing-64) var(--spacing-32);
}

.section-dark {
  background-color: var(--primary);
  color: var(--white);
}

.section-dark h2,
.section-dark h3 {
  color: var(--white);
}

.section-dark p {
  color: var(--light-gray);
}

/* ============================================
   GRID LAYOUTS
   ============================================ */

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-64);
  align-items: center;
  margin: var(--spacing-64) 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-32);
  margin: var(--spacing-64) 0;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-32);
  margin: var(--spacing-64) 0;
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  padding: var(--spacing-32);
  border-radius: 4px;
  transition: all 0.3s ease-in-out;
  box-shadow: 0 2px 6px rgba(26, 59, 79, 0.06);
}

.card:hover {
  box-shadow: 0 8px 20px rgba(26, 59, 79, 0.12);
  transform: translateY(-4px);
  border-color: var(--secondary);
}

.card h3 {
  margin-top: 0;
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  margin-bottom: var(--spacing-16);
  border-radius: 2px;
}

/* ============================================
   IMAGES & MEDIA
   ============================================ */

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

.image-section {
  position: relative;
  overflow: hidden;
}

.image-section img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.image-caption {
  font-size: 13px;
  color: var(--text-light);
  font-style: italic;
  margin-top: var(--spacing-16);
  text-align: center;
}

/* ============================================
   BUTTONS & CTA
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-16) var(--spacing-32);
  background-color: var(--secondary);
  color: var(--white);
  text-decoration: none;
  border-radius: 2px;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s ease-in-out;
  border: 2px solid var(--secondary);
  cursor: pointer;
}

.btn:hover {
  background-color: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(26, 59, 79, 0.2);
}

.btn-secondary {
  background-color: transparent;
  color: var(--secondary);
  border-color: var(--secondary);
}

.btn-secondary:hover {
  background-color: var(--secondary);
  color: var(--white);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background-color: var(--primary);
  color: var(--light-gray);
  padding: var(--spacing-64) var(--spacing-32);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-32);
  max-width: 1440px;
  margin: 0 auto var(--spacing-64);
}

.footer-section h4 {
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: var(--spacing-16);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.footer-section li {
  margin-bottom: var(--spacing-8);
}

.footer-section a {
  color: var(--soft-blue-gray);
  font-size: 13px;
  transition: color 0.3s ease-in-out;
}

.footer-section a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid var(--soft-blue-gray);
  padding-top: var(--spacing-32);
  text-align: center;
  color: var(--soft-blue-gray);
  font-size: 13px;
}

/* ============================================
   DISCLAIMER BLOCK
   ============================================ */

.disclaimer {
  background-color: #F5F7F9;
  border-left: 4px solid var(--secondary);
  padding: var(--spacing-24) var(--spacing-32);
  margin: var(--spacing-64) 0;
  border-radius: 2px;
}

.disclaimer h4 {
  color: var(--primary);
  margin: 0 0 var(--spacing-16) 0;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
}

.disclaimer p {
  font-size: 14px;
  color: var(--text-light);
  margin: 0;
  line-height: 1.5;
}

/* ============================================
   LISTS & CONTENT
   ============================================ */

ul, ol {
  margin: var(--spacing-16) 0 var(--spacing-24) var(--spacing-32);
}

li {
  margin-bottom: var(--spacing-8);
  color: var(--text-dark);
}

.divider {
  height: 1px;
  background-color: var(--border-color);
  margin: var(--spacing-64) 0;
}

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

@media (max-width: 768px) {
  h1 {
    font-size: 32px;
  }
  
  h2 {
    font-size: 24px;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  nav ul {
    gap: var(--spacing-16);
  }
  
  nav a {
    font-size: 12px;
  }
  
  section {
    padding: var(--spacing-64) var(--spacing-16);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
    gap: var(--spacing-32);
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .container {
    padding: 0 var(--spacing-16);
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 24px;
  }
  
  h2 {
    font-size: 20px;
  }
  
  nav ul {
    flex-direction: column;
    gap: var(--spacing-8);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}