:root {
  --primary-color: #0f172a;
  --primary-light: #1e293b;
  --accent-color: #0ea5e9;
  --accent-dark: #0284c7;
  --accent-light: #38bdf8;
  --success-color: #10b981;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --border-color: #e2e8f0;
  --border-light: #cbd5e1;
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08), 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --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);
  --radius-xs: 0.25rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 { font-size: 3.5rem; font-weight: 800; }
h2 { font-size: 2.25rem; font-weight: 700; }
h3 { font-size: 1.5rem; font-weight: 700; }
h4 { font-size: 1.25rem; font-weight: 600; }
h5 { font-size: 1.125rem; font-weight: 600; }
h6 { font-size: 1rem; font-weight: 600; }

p {
  line-height: 1.75;
  color: var(--text-secondary);
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

a:hover {
  color: var(--accent-dark);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.navbar {
  background: var(--bg-primary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.nav-brand .logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
  letter-spacing: -0.02em;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 0.5rem;
  align-items: center;
}

.nav-menu a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--accent-color);
  background: rgba(14, 165, 233, 0.08);
}

.btn-primary-small {
  background: var(--accent-color);
  color: white !important;
  padding: 0.625rem 1.25rem !important;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.2);
}

.btn-primary-small:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(14, 165, 233, 0.3);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0ea5e9 100%);
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
  color: white;
  padding: 7rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  top: -200px;
  right: -200px;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -30px); }
}

.hero::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  bottom: -100px;
  left: -100px;
  animation: float 8s ease-in-out infinite reverse;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: white;
  font-size: 3.5rem;
  margin-bottom: 1rem;
  font-weight: 800;
  animation: slideInDown 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translate3d(0, -30px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

.hero-subtitle {
  font-size: 1.375rem;
  margin-bottom: 2.5rem;
  color: rgba(255, 255, 255, 0.9);
  animation: slideInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 0.2s;
  animation-fill-mode: both;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translate3d(0, 30px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

.hero-actions {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeIn 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 0.4s;
  animation-fill-mode: both;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 1rem;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: var(--accent-color);
  color: white;
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(14, 165, 233, 0.4);
  background: var(--accent-dark);
}

.btn-secondary {
  background: transparent;
  color: white;
  border-color: white;
}

.btn-secondary:hover {
  background: white;
  color: var(--accent-color);
  transform: translateY(-3px);
}

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

.btn-outline:hover {
  background: var(--accent-color);
  color: white;
  transform: translateY(-3px);
}

.stats-section {
  background: var(--bg-secondary);
  padding: 4rem 0;
  position: relative;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.stat-card {
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: var(--radius-xl);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.stat-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  border-color: var(--accent-color);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 1rem;
  margin: 0;
  font-weight: 500;
}

.section {
  padding: 5rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2.25rem;
  color: var(--text-primary);
  position: relative;
}

.section-title::after {
  content: '';
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-color), var(--accent-light));
  border-radius: var(--radius-full);
  display: block;
  margin: 1rem auto 0;
}

.announcements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.announcement-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.announcement-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-color), var(--success-color));
}

.announcement-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: var(--accent-color);
}

.announcement-badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-urgent {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.badge-normal {
  background: rgba(14, 165, 233, 0.1);
  color: #0284c7;
}

.announcement-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.announcement-date {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-bottom: 1rem;
  font-weight: 500;
}

.announcement-card p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.journals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.journal-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.journal-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-12px);
  border-color: var(--accent-color);
}

.journal-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

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

.journal-content {
  padding: 2rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.journal-subject {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: rgba(14, 165, 233, 0.1);
  color: var(--accent-color);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  width: fit-content;
}

.journal-card h3 {
  font-size: 1.375rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.journal-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-bottom: 1rem;
  flex-wrap: wrap;
  font-weight: 500;
}

.journal-card p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-secondary);
  flex-grow: 1;
}

.articles-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 3rem;
}

.article-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.article-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-color);
  transform: translateX(4px);
}

.article-header {
  margin-bottom: 1.5rem;
}

.article-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.article-authors {
  color: var(--accent-color);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.article-meta {
  display: flex;
  gap: 2rem;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  flex-wrap: wrap;
  font-weight: 500;
}

.article-abstract {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-light);
}

.article-abstract p {
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-keywords {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.keyword-tag {
  padding: 0.375rem 1rem;
  background: rgba(14, 165, 233, 0.08);
  color: var(--accent-color);
  font-size: 0.8125rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  border: 1px solid rgba(14, 165, 233, 0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.keyword-tag:hover {
  background: rgba(14, 165, 233, 0.15);
  border-color: var(--accent-color);
}

.text-center {
  text-align: center;
  margin-top: 2rem;
}

.cta-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  color: white;
  padding: 5rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.cta-section::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  top: -200px;
  right: -200px;
}

.cta-section::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  bottom: -150px;
  left: -150px;
}

.cta-section h2 {
  color: white;
  font-size: 2.25rem;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.cta-section p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

.footer {
  background: var(--primary-color);
  color: white;
  padding: 4rem 0 1rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2.5rem;
  margin-bottom: 2rem;
}

.footer-col h3 {
  color: white;
  font-size: 1rem;
  margin-bottom: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-col p {
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
  font-size: 0.9375rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.75);
  transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 0.9375rem;
}

.footer-links a:hover {
  color: var(--accent-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8125rem;
  margin: 0;
}

.editorial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.editor-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.editor-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-8px);
  border-color: var(--accent-color);
}

.editor-image {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1.5rem;
  border: 4px solid var(--accent-color);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.editor-role {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: rgba(14, 165, 233, 0.1);
  color: var(--accent-color);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.editor-card h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.editor-affiliation {
  color: var(--accent-color);
  font-size: 0.9375rem;
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.editor-expertise {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  font-style: italic;
  line-height: 1.6;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9375rem;
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-control::placeholder {
  color: var(--text-tertiary);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

select.form-control {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%230ea5e9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 20px;
  padding-right: 2.75rem;
}

.page-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.page-header h1 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.page-header p {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
}

.content-section {
  padding: 4rem 0;
}

.content-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 3rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.content-card h2 {
  margin-bottom: 1.5rem;
  color: var(--accent-color);
  font-size: 1.75rem;
}

.content-card h3 {
  margin-top: 1.75rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.content-card ul,
.content-card ol {
  margin-left: 1.75rem;
  margin-bottom: 1.5rem;
}

.content-card li {
  margin-bottom: 0.75rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.indexing-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.indexing-item {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.08) 0%, rgba(14, 165, 233, 0.04) 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
  font-weight: 600;
  color: var(--accent-color);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.indexing-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(14, 165, 233, 0.15);
  border-color: var(--accent-color);
}

.search-bar {
  max-width: 700px;
  margin: 0 auto 2.5rem;
  position: relative;
}

.search-bar input {
  width: 100%;
  padding: 1rem 1.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.search-bar input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.filter-section {
  margin-bottom: 2.5rem;
  padding: 1.75rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.filter-group {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.filter-group label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9375rem;
}

.filter-group select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.filter-group select:hover,
.filter-group select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    gap: 0;
    padding: 1rem;
    box-shadow: var(--shadow-lg);
    display: none;
    border-top: 1px solid var(--border-color);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu a {
    display: block;
    padding: 1rem;
  }

  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }

  .hero {
    padding: 4rem 0;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .section {
    padding: 3rem 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .journals-grid,
  .announcements-grid {
    grid-template-columns: 1fr;
  }

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

  .content-card {
    padding: 1.5rem;
  }

  .cta-section {
    padding: 3rem 0;
  }

  .cta-section h2 {
    font-size: 1.75rem;
  }

  .cta-section p {
    font-size: 1rem;
  }

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

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

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }

  .hero {
    padding: 2rem 0;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 1.5rem;
  }

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

  .stat-number {
    font-size: 2.25rem;
  }

  .navbar .container {
    padding: 0.75rem 1rem;
  }

  .nav-menu {
    padding: 0.75rem;
  }

  .nav-menu a {
    padding: 0.75rem;
  }

  .filter-group {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-group select {
    width: 100%;
  }
}