:root {

  --primary: #111827;

  --secondary: #2563eb;

  --background: #f8fafc;

  --surface: #ffffff;

  --text: #1e293b;

  --muted: #64748b;

  --border: #e2e8f0;

  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);

  --radius: 20px;

}



* {

  margin: 0;

  padding: 0;

  box-sizing: border-box;

}



html {

  scroll-behavior: smooth;

}



body {

  font-family: 'Inter', sans-serif;

  background: var(--background);

  color: var(--text);

  line-height: 1.7;

}



img {

  width: 100%;

  display: block;

}



.container {

  width: min(1150px, 92%);

  margin-inline: auto;

}



.narrow-container {

  max-width: 900px;

}



.section {

  padding: 2rem 0;

}



.header {

  position: sticky;

  top: 0;

  z-index: 1000;

  background: rgba(255, 255, 255, 0.9);

  backdrop-filter: blur(10px);

  border-bottom: 1px solid var(--border);

}



.navbar {

  display: flex;

  justify-content: space-between;

  align-items: center;

  min-height: 80px;

}



.logo {

  font-size: 1.2rem;

  font-weight: 700;

  color: var(--primary);

  text-decoration: none;

}



.nav {

  display: flex;

  gap: 1.5rem;

}



.nav a {

  text-decoration: none;

  color: var(--text);

  font-weight: 500;

  transition: 0.3s ease;

}



.nav a:hover,

.nav a.active {

  color: var(--secondary);

}



.menu-toggle {

  display: none;

  border: none;

  background: transparent;

  font-size: 1.8rem;

  cursor: pointer;

}



.hero-grid {

  display: grid;

  grid-template-columns: 2.2fr 0.8fr;

  gap: 4rem;

  align-items: center;

}



.tag {

  color: var(--secondary);

  font-weight: 600;

  margin-bottom: 1rem;

}





.hero h1 {

  font-size: clamp(1.5rem, 1.4vw, 4.5rem);

  line-height: 2.0;

  margin-bottom: 1.5rem;

}



.hero-text {

  color: var(--muted);

  margin-bottom: 1rem;

}



.hero-image {

  border-radius: 30px;

  box-shadow: var(--shadow);

}



.hero-buttons {

  display: flex;

  gap: 1rem;

}



.btn {

  display: inline-flex;

  align-items: center;

  justify-content: center;

  padding: 0.9rem 1.5rem;

  border-radius: 999px;

  text-decoration: none;

  font-weight: 600;

  transition: 0.3s ease;

}



.btn-primary {

  background: var(--secondary);

  color: white;

}



.btn-secondary {

  border: 1px solid var(--border);

  color: var(--text);

}





.btn:hover {

  transform: translateY(-2px);

}



.cards-grid,

.gallery-grid,

.research-grid {

  display: grid;

  gap: 2rem;

}



.cards-grid {

  grid-template-columns: repeat(3, 1fr);

}



.gallery-grid {

  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));

}



.research-grid {

  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));

}



.card {

  background: var(--surface);

  border-radius: var(--radius);

  padding: 2rem;

  box-shadow: var(--shadow);

  border: 3px solid var(--border);

}



.timeline {

  display: flex;

  flex-direction: column;

  gap: 1.5rem;

}





.timeline-item {

  padding: 1.5rem;

  background: white;

  border-radius: 16px;

  border-left: 4px solid var(--secondary);

  box-shadow: var(--shadow);

}



.timeline-date {

  font-weight: 700;

  color: var(--secondary);

}



.section-header,

.page-header {

  margin-bottom: 3rem;

  text-align: center;

}



.section-header h2,

.page-header h1 {

  font-size: clamp(2rem, 4vw, 3rem);

  margin-bottom: 1rem;

}



.page-header p,

.section-header p {

  color: var(--muted);

}



.gallery-grid img,

.research-card img {

  border-radius: 20px;

  object-fit: cover;

  aspect-ratio: 4 / 3;

  transition: 0.3s ease;

}



.gallery-grid img:hover,

.research-card:hover {

  transform: translateY(-5px);

}



.footer {

  padding: 3rem 0;

  border-top: 1px solid var(--border);

  background: white;

}



.footer-content {

  display: flex;

  justify-content: space-between;

  align-items: center;

  gap: 2rem;

}



.footer-links {

  display: flex;

  gap: 1rem;

}



.footer-links a {

  text-decoration: none;

  color: var(--text);

}