/* ===== CSS Variables ===== */
:root {
  --primary: #4a87fe;
  --primary-dark: #784fff;
  --accent: #0d92f4;
  --white: #ffffff;
  --black: #0a0a0a;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --gradient: linear-gradient(93.96deg, #4a87fe 46.76%, #784fff 87.99%);
  --gradient-hover: linear-gradient(93.96deg, #3a77ee 46.76%, #6840ef 87.99%);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--white);
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-100);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon svg {
  width: 40px;
  height: 40px;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-500);
  letter-spacing: 0.05em;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  border-radius: 8px;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--primary);
  background: var(--gray-50);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url("/placeholder.svg?height=1080&width=1920") center / cover;
  opacity: 0.1;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 120px 0 80px;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: linear-gradient(to right, var(--white), rgba(255, 255, 255, 0.7));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

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

.btn-primary:hover {
  background: var(--gray-100);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

.btn-full {
  width: 100%;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 0.25rem;
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  animation: bounce 2s infinite;
}

.scroll-icon {
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 12px;
  position: relative;
}

.scroll-icon::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 2px;
  animation: scrollDown 2s infinite;
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

@keyframes scrollDown {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }
}

/* ===== Section Styles ===== */
.section {
  padding: 6rem 0;
}

.section-dark {
  background: var(--gray-900);
  color: var(--white);
}

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

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-header-light .section-title,
.section-header-light .section-description {
  color: var(--white);
}

.section-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(74, 135, 254, 0.1);
  padding: 0.375rem 0.75rem;
  border-radius: 50px;
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}

.section-badge-light {
  background: rgba(255, 255, 255, 0.2);
  color: var(--white);
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 1rem;
  line-height: 1.2;
}

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

.section-description {
  font-size: 1.125rem;
  color: var(--gray-500);
  line-height: 1.7;
}

.section-dark .section-description {
  color: var(--gray-400);
}

/* ===== Activities Section ===== */
.activities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.activity-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 2rem;
  transition: var(--transition);
}

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

.activity-card-large {
  grid-column: span 2;
  background: var(--gradient);
  border: none;
  color: var(--white);
}

.activity-card-large:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(74, 135, 254, 0.3);
}

.activity-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-100);
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

.activity-card-large .activity-icon {
  background: rgba(255, 255, 255, 0.2);
}

.activity-icon svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}

.activity-card-large .activity-icon svg {
  color: var(--white);
}

.activity-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.activity-card p {
  color: var(--gray-500);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.activity-card-large p {
  color: rgba(255, 255, 255, 0.85);
}

/* ===== Team Section ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.team-card {
  background: var(--gray-800);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.team-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.team-card-featured {
  grid-column: span 2;
  grid-row: span 2;
}

.team-image {
  aspect-ratio: 3 / 4;
  overflow: hidden;
}

.team-card-featured .team-image {
  aspect-ratio: auto;
  height: 65%;
}

.team-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.team-card:hover .team-image img {
  transform: scale(1.05);
}

.team-info {
  padding: 1.5rem;
}

.team-card-featured .team-info {
  padding: 2rem;
}

.team-role {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(74, 135, 254, 0.15);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  margin-bottom: 0.75rem;
}

.team-info h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.25rem;
}

.team-card-featured .team-info h3 {
  font-size: 1.5rem;
}

.team-info p {
  font-size: 0.875rem;
  color: var(--gray-400);
}

.team-contact {
  margin-top: 1rem;
}

.team-contact a {
  font-size: 0.875rem;
  color: var(--primary);
  transition: var(--transition);
}

.team-contact a:hover {
  color: var(--accent);
}

.team-more {
  text-align: center;
  margin-top: 3rem;
}

/* ===== Research Section ===== */
.research-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
}

.research-card {
  background: var(--gray-50);
  border-radius: 16px;
  padding: 2.5rem;
  margin-bottom: 2rem;
}

.research-year {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 1rem;
}

.research-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 1.5rem;
}

.research-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.research-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  font-size: 1rem;
  color: var(--gray-700);
}

.research-icon {
  color: var(--primary);
  font-weight: 600;
}

.publications-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.publication-stat {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
}

.publication-stat:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.publication-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.publication-label {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-top: 0.5rem;
}

.research-sidebar h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 1.5rem;
}

.publication-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.publication-item {
  padding: 1.5rem;
  background: var(--gray-50);
  border-radius: 12px;
  transition: var(--transition);
}

.publication-item:hover {
  background: var(--white);
  box-shadow: var(--shadow-md);
}

.publication-type {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(74, 135, 254, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

.publication-item h5 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.publication-item p {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* ===== Education Section ===== */
.education-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.education-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 2rem;
  transition: var(--transition);
}

.education-card:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-8px);
}

.education-card-featured {
  background: var(--white);
  color: var(--gray-900);
  border: none;
}

.education-card-featured:hover {
  background: var(--white);
  box-shadow: var(--shadow-xl);
}

.education-level {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.375rem 0.875rem;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.2);
  margin-bottom: 1rem;
}

.education-card-featured .education-level {
  background: var(--gradient);
  color: var(--white);
}

.education-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.education-card > p {
  font-size: 0.9375rem;
  opacity: 0.8;
  margin-bottom: 1.5rem;
}

.education-card-featured > p {
  color: var(--gray-500);
}

.education-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.education-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9375rem;
}

.education-features li::before {
  content: "✓";
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  font-size: 0.75rem;
}

.education-card-featured .education-features li::before {
  background: var(--gradient);
  color: var(--white);
}

.education-duration {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.875rem;
  font-weight: 600;
}

.education-card-featured .education-duration {
  border-color: var(--gray-200);
  color: var(--primary);
}

.education-duration svg {
  width: 18px;
  height: 18px;
}

.subjects-section {
  text-align: center;
}

.subjects-section h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
}

.subjects-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.subject-tag {
  padding: 0.75rem 1.5rem;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: var(--transition);
}

.subject-tag:hover {
  background: var(--white);
  color: var(--primary);
}

/* ===== Partners Section ===== */
.partners-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.partners-map {
  position: relative;
}

.map-placeholder {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.map-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.partners-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.partner-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--gray-50);
  border-radius: 12px;
  transition: var(--transition);
}

.partner-card:hover {
  background: var(--white);
  box-shadow: var(--shadow-md);
  transform: translateX(8px);
}

.partner-flag {
  font-size: 2rem;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

.partner-info h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 0.125rem;
}

.partner-info p {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: 0.5rem;
}

.partner-type {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
  background: rgba(74, 135, 254, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.cooperation-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.coop-stat {
  text-align: center;
  padding: 2rem;
  background: var(--gray-50);
  border-radius: 16px;
  transition: var(--transition);
}

.coop-stat:hover {
  background: var(--gradient);
  color: var(--white);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.coop-number {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.coop-stat:hover .coop-number {
  color: var(--white);
}

.foriegn {
    gap: 1.5rem;
    display: flex;
    flex-direction: row;
  }
.coop-label {
  font-size: 0.9375rem;
  color: var(--gray-500);
}

.coop-stat:hover .coop-label {
  color: rgba(255, 255, 255, 0.85);
}

/* ===== Documents Section ===== */
.documents-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.document-card {
  background: var(--gray-800);
  border-radius: 16px;
  padding: 2rem;
  transition: var(--transition);
}

.document-card:hover {
  background: var(--gray-700);
  transform: translateY(-4px);
}

.document-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(74, 135, 254, 0.15);
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

.document-icon svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}

.document-card h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.document-card p {
  font-size: 0.875rem;
  color: var(--gray-400);
  margin-bottom: 1.5rem;
}

.document-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
}

.document-link:hover {
  color: var(--accent);
}

.document-link svg {
  width: 18px;
  height: 18px;
}

/* ===== Contact Section ===== */
.section-contact {
  background: var(--gray-50);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.contact-info h2 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 1rem;
}

.contact-info > p {
  font-size: 1.125rem;
  color: var(--gray-500);
  margin-bottom: 2.5rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  border-radius: 12px;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 22px;
  height: 22px;
  color: var(--white);
}

.contact-item h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 0.25rem;
}

.contact-item p {
  font-size: 0.9375rem;
  color: var(--gray-600);
}

.contact-form-wrapper {
  background: var(--white);
  border-radius: 24px;
  padding: 2.5rem;
  box-shadow: var(--shadow-xl);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--gray-800);
  background: var(--gray-50);
  border: 2px solid transparent;
  border-radius: 12px;
  transition: var(--transition);
  resize: none;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  background: var(--white);
  border-color: var(--primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-400);
}

/* ===== Footer ===== */
.footer {
  background: var(--gray-900);
  color: var(--white);
  padding: 5rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-brand .logo {
  margin-bottom: 1.5rem;
}

.footer-brand .logo-title {
  color: var(--white);
}

.footer-description {
  font-size: 0.9375rem;
  color: var(--gray-400);
  line-height: 1.7;
  max-width: 320px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-column h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-column a {
  font-size: 0.9375rem;
  color: var(--gray-400);
  transition: var(--transition);
}

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

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-800);
  border-radius: 10px;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--gradient);
}

.social-link svg {
  width: 18px;
  height: 18px;
  color: var(--gray-400);
  transition: var(--transition);
}

.social-link:hover svg {
  color: var(--white);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--gray-800);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.875rem;
  color: var(--gray-500);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
  }

  .nav.active {
    display: block;
  }
  .nav-list {
    flex-direction: column;
    gap: 0.25rem;
  }

  .nav-link {
    padding: 0.875rem 1rem;
    border-radius: 8px;
  }

  .mobile-menu-btn {
    display: flex;
  }

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

  .activity-card-large {
    grid-column: span 1;
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-card-featured {
    grid-column: span 2;
    grid-row: span 1;
  }

  .team-card-featured .team-image {
    height: 300px;
  }

  .research-content {
    grid-template-columns: 1fr;
  }

  .publications-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .partners-content {
    grid-template-columns: 1fr;
  }

  .cooperation-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .documents-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-stats {
    gap: 2rem;
  }

  .stat-number {
    font-size: 2rem;
  }

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

  .team-card-featured {
    grid-column: span 1;
  }

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

  .cooperation-stats {
    grid-template-columns: 1fr 1fr;
  }

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

  .footer-links {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .foriegn {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .section {
    padding: 4rem 0;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
  }

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

  .cooperation-stats {
    grid-template-columns: 1fr;
  }

  .contact-form-wrapper {
    padding: 1.5rem;
  }
  .foriegn {
    gap: 1rem;
    flex-direction: column;
  }
}