/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors - ADAY ORTALYGY brand */
  --primary: #1b6b7d;
  --primary-dark: #145a6a;
  --secondary: #d4a01e;
  --yellow: #e8b820;
  --yellow-light: #f5d04a;
  --yellow-dark: #c49a10;
  --yellow-bg: #fef9e7;
  --yellow-border: #f7e07a;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #d4a01e;
  --info: #1b6b7d;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1b6b7d 0%, #0f4a58 100%);
  --gradient-hero: linear-gradient(135deg, #1b3a5c 0%, #1b6b7d 50%, #0f4a58 100%);
  --gradient-yellow: linear-gradient(135deg, #e8b820 0%, #d4a01e 100%);

  /* Neutrals */
  --white: #ffffff;
  --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;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Spacing */
  --container-width: 1200px;
  --border-radius: 12px;
  --border-radius-lg: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--gray-900);
  background-color: var(--gray-50);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  border-top: 4px solid var(--yellow);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.logo img {
  height: 44px;
  width: auto;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-text .logo-main {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
}

.logo-text .logo-sub {
  font-size: 10px;
  font-weight: 500;
  color: var(--gray-500);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  color: var(--gray-600);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

.nav-link.active {
  border-bottom: 3px solid var(--yellow);
  padding-bottom: 4px;
}

.header-actions {
  display: flex;
  gap: 12px;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--gray-700);
  cursor: pointer;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  z-index: 99;
}

.mobile-menu.active {
  display: block;
}

.mobile-menu-link {
  display: block;
  padding: 12px 0;
  color: var(--gray-700);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--gray-200);
}

.mobile-menu-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-outline,
.btn-cta {
  padding: 10px 24px;
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  border: none;
  font-size: 15px;
  text-decoration: none;
  display: inline-block;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.btn-secondary:hover {
  background: var(--gray-200);
}

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

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

.btn-cta {
  background: var(--secondary);
  color: var(--white);
  padding: 14px 32px;
  font-size: 16px;
  box-shadow: var(--shadow-md);
  letter-spacing: 1px;
}

.btn-cta:hover {
  background: #b8890f;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-full {
  width: 100%;
}

/* Hero Section */
.hero {
  background: var(--gradient-hero);
  padding: 80px 0 0;
  color: var(--white);
  overflow: hidden;
}

.hero .container {
  max-width: 1600px;
}

.hero-content {
  display: flex;
  align-items: flex-end;
  gap: 60px;
}

.hero-text {
  flex: 1;
  padding-bottom: 80px;
}

.hero-badge {
  display: inline-block;
  background: var(--yellow);
  color: var(--gray-900);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-description {
  font-size: 18px;
  line-height: 1.6;
  opacity: 0.95;
  margin-bottom: 32px;
}

.hero-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-feature i {
  font-size: 20px;
  color: var(--secondary);
}

.hero-image {
  flex: 0 0 1040px;
  max-width: 1040px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  align-self: flex-end;
}

.hero-image img {
  width: 100%;
  max-width: 1040px;
  height: auto;
  min-height: 960px;
  object-fit: contain;
  object-position: bottom;
  display: block;
  filter: drop-shadow(0 12px 40px rgba(0, 0, 0, 0.35));
  margin-bottom: 0;
}

/* About Section */
.about-section {
  padding: 80px 0;
  background: var(--white);
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 48px;
  color: var(--gray-900);
  position: relative;
  display: inline-block;
  width: 100%;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--yellow);
  margin: 12px auto 0;
  border-radius: 2px;
}

.section-description {
  text-align: center;
  color: var(--gray-600);
  font-size: 16px;
  line-height: 1.7;
  max-width: 700px;
  margin: -28px auto 40px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin-bottom: 48px;
}

.feature-card {
  background: var(--gray-50);
  padding: 32px;
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-bottom: 3px solid var(--yellow);
}

.feature-number {
  display: inline-block;
  width: 40px;
  height: 40px;
  background: var(--yellow);
  color: var(--gray-900);
  border-radius: 50%;
  font-size: 20px;
  font-weight: 700;
  line-height: 40px;
  margin-bottom: 16px;
}

.feature-icon {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 16px;
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--gray-900);
}

.feature-text {
  color: var(--gray-600);
  line-height: 1.6;
}

.cta-box {
  background: var(--gradient-primary);
  padding: 48px;
  border-radius: var(--border-radius-lg);
  color: var(--white);
  display: flex;
  gap: 32px;
  align-items: center;
}

.cta-icon {
  font-size: 64px;
  flex-shrink: 0;
}

.cta-content h3 {
  font-size: 24px;
  margin-bottom: 12px;
}

.cta-content p {
  opacity: 0.95;
  line-height: 1.6;
}

/* Publications Section */
.publications-section {
  padding: 80px 0;
  background: var(--gray-50);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.view-all {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.view-all:hover {
  text-decoration: underline;
}

.category-filter {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.category-btn {
  padding: 10px 20px;
  border: 2px solid var(--gray-200);
  background: var(--white);
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.category-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.category-btn.active {
  background: var(--yellow);
  color: var(--gray-900);
  border-color: var(--yellow);
  font-weight: 700;
}

.publications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
}

.publication-card {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: var(--shadow);
}

.publication-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-top: 3px solid var(--yellow);
}

.publication-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.publication-card-content {
  padding: 24px;
}

.publication-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.publication-lessons {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--gray-500);
  font-size: 14px;
}

.publication-lessons i {
  color: var(--secondary);
}

.publication-rating {
  display: flex;
  gap: 2px;
}

.publication-rating i {
  color: var(--secondary);
  font-size: 14px;
}

.publication-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--gray-900);
  line-height: 1.4;
}

.publication-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.author-info {
  flex: 1;
}

.author-name {
  font-weight: 600;
  color: var(--gray-900);
  font-size: 14px;
}

.author-role {
  color: var(--gray-500);
  font-size: 13px;
}

.publication-badge {
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}

.badge-primary {
  background: #e6f3f5;
  color: var(--primary);
}

.badge-success {
  background: #d1fae5;
  color: var(--success);
}

.badge-warning {
  background: #fef3c7;
  color: var(--warning);
}

.badge-info {
  background: #dbeafe;
  color: var(--info);
}

.badge-danger {
  background: #fee2e2;
  color: var(--danger);
}

/* Footer */
.footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 60px 0 24px;
  border-top: 4px solid var(--yellow);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-title {
  color: var(--white);
  font-size: 20px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-subtitle {
  color: var(--white);
  font-size: 16px;
  margin-bottom: 16px;
}

.footer-text {
  line-height: 1.6;
  color: var(--gray-400);
}

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

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--gray-400);
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--gray-400);
}

.footer-bottom {
  border-top: 1px solid var(--gray-800);
  padding-top: 24px;
  text-align: center;
  color: var(--gray-500);
}

/* Auth Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--white);
  padding: 40px;
  border-radius: var(--border-radius-lg);
  max-width: 480px;
  width: 90%;
  position: relative;
  box-shadow: var(--shadow-xl);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 28px;
  color: var(--gray-400);
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--gray-700);
}

.auth-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--gray-700);
}

.form-input {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  font-size: 15px;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
}

.auth-switch {
  text-align: center;
  margin-top: 24px;
  color: var(--gray-600);
}

.auth-switch a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.auth-switch a:hover {
  text-decoration: underline;
}

/* Page Header */
.page-header {
  background: var(--gradient-hero);
  padding: 60px 0;
  color: var(--white);
  text-align: center;
}

.page-title {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-subtitle {
  font-size: 18px;
  opacity: 0.95;
  margin-bottom: 32px;
}

.search-bar {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  gap: 12px;
}

.search-bar input {
  flex: 1;
  padding: 14px 20px;
  border-radius: var(--border-radius);
  border: none;
  font-size: 16px;
}

.search-btn {
  padding: 14px 28px;
  background: var(--secondary);
  border: none;
  border-radius: var(--border-radius);
  color: var(--white);
  font-size: 18px;
  cursor: pointer;
  transition: background 0.3s;
}

.search-btn:hover {
  background: #b8890f;
}

/* Publications Page */
.publications-page {
  padding: 60px 0;
}

.publications-layout {
  display: flex;
  gap: 32px;
}

.filters-sidebar {
  width: 280px;
  flex-shrink: 0;
}

.filter-section {
  background: var(--white);
  padding: 24px;
  border-radius: var(--border-radius-lg);
  margin-bottom: 24px;
}

.filter-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

.filter-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.filter-option {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.filter-option input {
  cursor: pointer;
}

.publications-main {
  flex: 1;
}

.publications-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.results-count {
  color: var(--gray-600);
  font-size: 15px;
}

.sort-select {
  padding: 10px 16px;
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  background: var(--white);
  cursor: pointer;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}

.pagination-btn {
  padding: 10px 16px;
  border: 2px solid var(--gray-200);
  background: var(--white);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s;
}

.pagination-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.pagination-btn.active {
  background: var(--yellow);
  color: var(--gray-900);
  border-color: var(--yellow);
  font-weight: 700;
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Authors Page */
.authors-section {
  padding: 60px 0;
}

.authors-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.authors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 32px;
}

.author-card {
  background: var(--white);
  padding: 32px;
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: var(--shadow);
}

.author-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.author-card-image {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 16px;
  object-fit: cover;
}

.author-card-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.author-card-id {
  color: var(--gray-500);
  font-size: 14px;
  margin-bottom: 12px;
}

.author-card-affiliation {
  color: var(--gray-600);
  font-size: 14px;
  margin-bottom: 16px;
}

.author-card-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-200);
}

.author-stat {
  text-align: center;
}

.author-stat-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.author-stat-label {
  font-size: 12px;
  color: var(--gray-500);
}

/* Author Profile */
.author-profile {
  padding: 60px 0;
}

.author-profile-header {
  background: var(--white);
  padding: 40px;
  border-radius: var(--border-radius-lg);
  margin-bottom: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
}

.author-profile-main {
  display: flex;
  gap: 24px;
  align-items: center;
}

.author-profile-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
}

.author-profile-name {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
}

.author-id {
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.author-affiliation {
  color: var(--gray-600);
  margin-bottom: 12px;
}

.author-badges {
  display: flex;
  gap: 8px;
}

.badge {
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}

.author-profile-actions {
  display: flex;
  gap: 12px;
}

/* Author Stats Grid */
.author-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--white);
  padding: 24px;
  border-radius: var(--border-radius-lg);
  display: flex;
  gap: 16px;
  align-items: center;
  box-shadow: var(--shadow);
}

.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--white);
}

.stat-icon-primary {
  background: var(--primary);
}
.stat-icon-success {
  background: var(--success);
}
.stat-icon-warning {
  background: var(--yellow);
}
.stat-icon-info {
  background: var(--info);
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--gray-900);
}

.stat-label {
  color: var(--gray-600);
  font-size: 14px;
}

/* Charts */
.charts-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}

.chart-card {
  background: var(--white);
  padding: 24px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}

.chart-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 24px;
}

/* Profile Sections */
.profile-section {
  background: var(--white);
  padding: 32px;
  border-radius: var(--border-radius-lg);
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

.profile-section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
}

.profile-bio {
  color: var(--gray-600);
  line-height: 1.8;
}

.interests-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.interest-tag {
  padding: 8px 16px;
  background: var(--gray-100);
  border-radius: 20px;
  color: var(--gray-700);
  font-weight: 500;
}

/* Publications List */
.publications-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.publication-list-item {
  padding: 20px;
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  transition: border-color 0.2s;
}

.publication-list-item:hover {
  border-color: var(--primary);
}

.publication-list-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.publication-list-meta {
  display: flex;
  gap: 16px;
  color: var(--gray-500);
  font-size: 14px;
}

/* Publication Detail */
.publication-detail {
  padding: 60px 0;
  background: var(--white);
}

.publication-layout {
  display: flex;
  gap: 32px;
}

.publication-main {
  flex: 1;
}

.publication-sidebar {
  width: 320px;
  flex-shrink: 0;
}

.publication-header {
  margin-bottom: 32px;
}

.publication-category {
  display: inline-block;
  padding: 6px 12px;
  background: var(--yellow);
  color: var(--gray-900);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.publication-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 24px;
}

.publication-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--gray-200);
}

.publication-authors {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-600);
}

.publication-date,
.publication-views,
.publication-rating {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--gray-600);
}

.publication-image {
  width: 100%;
  height: 400px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
}

.publication-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.publication-content {
  color: var(--gray-700);
  line-height: 1.8;
}

.publication-content h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 32px 0 16px;
}

.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0;
}

.keyword-tag {
  padding: 6px 12px;
  background: var(--gray-100);
  border-radius: 20px;
  font-size: 14px;
  color: var(--gray-700);
}

.publication-actions {
  display: flex;
  gap: 12px;
  margin: 32px 0;
  padding: 32px 0;
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.action-btn {
  padding: 12px 24px;
  background: var(--gray-100);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  transition: all 0.2s;
}

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

.certificate-section {
  background: var(--gradient-primary);
  padding: 32px;
  border-radius: var(--border-radius-lg);
  color: var(--white);
  display: flex;
  gap: 24px;
  align-items: center;
}

.certificate-icon {
  font-size: 56px;
}

.certificate-content h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

/* Sidebar Cards */
.sidebar-card {
  background: var(--gray-50);
  padding: 24px;
  border-radius: var(--border-radius-lg);
  margin-bottom: 24px;
}

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

.metrics-list,
.info-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.metric-item {
  display: flex;
  gap: 12px;
  align-items: center;
}

.metric-item i {
  font-size: 24px;
  color: var(--primary);
}

.metric-value {
  font-size: 20px;
  font-weight: 700;
}

.metric-label {
  font-size: 13px;
  color: var(--gray-500);
}

.info-item {
  display: flex;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gray-200);
}

.related-publications {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.related-item {
  padding: 12px;
  background: var(--white);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background 0.2s;
}

.related-item:hover {
  background: var(--gray-100);
}

.related-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
}

.related-author {
  font-size: 13px;
  color: var(--gray-500);
}

/* Dashboard */
.dashboard {
  padding: 60px 0;
  background: var(--gray-50);
}

.dashboard-layout {
  display: flex;
  gap: 32px;
}

.dashboard-sidebar {
  width: 260px;
  flex-shrink: 0;
}

.dashboard-menu {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  padding: 16px;
  box-shadow: var(--shadow);
}

.dashboard-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--gray-700);
  text-decoration: none;
  border-radius: var(--border-radius);
  margin-bottom: 4px;
  transition: all 0.2s;
  font-weight: 500;
}

.dashboard-menu-item:hover {
  background: var(--gray-100);
}

.dashboard-menu-item.active {
  background: var(--primary);
  color: var(--white);
}

.dashboard-menu-item i {
  font-size: 18px;
  width: 20px;
}

.dashboard-main {
  flex: 1;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.dashboard-title {
  font-size: 32px;
  font-weight: 800;
}

/* Dashboard Stats */
.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.stat-change {
  margin-top: 8px;
  font-size: 13px;
  font-weight: 600;
}

.stat-change-up {
  color: var(--success);
}

.stat-change-down {
  color: var(--danger);
}

/* Dashboard Sections */
.dashboard-section {
  background: var(--white);
  padding: 32px;
  border-radius: var(--border-radius-lg);
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

/* Tables */
.publications-table table,
.admin-table table {
  width: 100%;
  border-collapse: collapse;
}

.publications-table th,
.admin-table th {
  text-align: left;
  padding: 12px;
  background: var(--gray-50);
  font-weight: 700;
  color: var(--gray-700);
  border-bottom: 2px solid var(--gray-200);
}

.publications-table td,
.admin-table td {
  padding: 16px 12px;
  border-bottom: 1px solid var(--gray-200);
}

.table-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.table-title i {
  color: var(--primary);
}

.table-actions {
  display: flex;
  gap: 8px;
}

.action-icon {
  padding: 8px;
  background: none;
  border: none;
  color: var(--gray-500);
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
}

.action-icon:hover {
  background: var(--gray-100);
  color: var(--primary);
}

.action-approve:hover {
  background: var(--success);
  color: var(--white);
}

.action-reject:hover {
  background: var(--danger);
  color: var(--white);
}

/* Status Badges */
.status-badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
}

.status-published {
  background: #d1fae5;
  color: var(--success);
}

.status-draft {
  background: var(--gray-200);
  color: var(--gray-600);
}

.status-pending {
  background: #fef3c7;
  color: var(--warning);
}

/* Activity List */
.activity-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.activity-item {
  display: flex;
  gap: 16px;
}

.activity-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.activity-icon-success {
  background: var(--success);
  color: var(--white);
}
.activity-icon-info {
  background: var(--info);
  color: var(--white);
}
.activity-icon-warning {
  background: var(--warning);
  color: var(--white);
}

.activity-title {
  font-weight: 700;
  margin-bottom: 4px;
}

.activity-text {
  color: var(--gray-600);
  font-size: 14px;
  margin-bottom: 4px;
}

.activity-time {
  font-size: 13px;
  color: var(--gray-500);
}

/* Submit Form */
.submit-page {
  padding: 60px 0;
  background: var(--gray-50);
}

.submit-layout {
  display: flex;
  gap: 32px;
}

.submit-main {
  flex: 1;
}

.submit-header {
  margin-bottom: 32px;
}

.submit-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
}

.submit-subtitle {
  color: var(--gray-600);
}

.submit-form {
  background: var(--white);
  padding: 40px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}

.form-section {
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--gray-200);
}

.form-section:last-child {
  border-bottom: none;
}

.form-section-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--gray-700);
}

.form-label.required::after {
  content: " *";
  color: var(--danger);
}

.form-textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  font-size: 15px;
  font-family: var(--font-sans);
  resize: vertical;
  transition: border-color 0.2s;
}

.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.form-help {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--gray-500);
}

.file-upload {
  border: 2px dashed var(--gray-300);
  border-radius: var(--border-radius);
  padding: 32px;
  text-align: center;
}

.file-upload-btn {
  padding: 12px 24px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.2s;
}

.file-upload-btn:hover {
  background: var(--primary-dark);
}

.file-upload-text {
  margin-top: 12px;
  color: var(--gray-500);
  font-size: 14px;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.form-checkbox input {
  margin-top: 4px;
  cursor: pointer;
}

.form-checkbox label {
  cursor: pointer;
  color: var(--gray-700);
}

.form-checkbox a {
  color: var(--primary);
  text-decoration: none;
}

.form-checkbox a:hover {
  text-decoration: underline;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* Admin Tab Content */
.admin-tab-content {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Admin Page */
.admin-dashboard {
  padding: 60px 0;
  background: var(--gray-50);
}

.admin-layout {
  display: flex;
  gap: 32px;
}

.admin-sidebar {
  width: 260px;
  flex-shrink: 0;
}

.admin-main {
  flex: 1;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.admin-title {
  font-size: 32px;
  font-weight: 800;
}

.admin-actions {
  display: flex;
  gap: 12px;
}

/* Admin Stats */
.admin-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

/* Admin Sections */
.admin-section {
  background: var(--white);
  padding: 32px;
  border-radius: var(--border-radius-lg);
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

.admin-section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
}

/* Admin Table */
.admin-table {
  width: 100%;
}

.table-toolbar {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.search-box {
  flex: 1;
  position: relative;
}

.search-box i {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
}

.search-input {
  width: 100%;
  padding: 10px 10px 10px 40px;
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  font-size: 15px;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
}

.filter-select {
  padding: 10px 16px;
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  background: var(--white);
  cursor: pointer;
}

.table-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
}

.pagination-info {
  color: var(--gray-600);
  font-size: 14px;
}

/* Requests List */
.requests-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.request-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--gray-50);
  border-radius: var(--border-radius);
}

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

.request-icon-merge {
  background: var(--info);
}

.request-icon-edit {
  background: var(--warning);
}

.request-content {
  flex: 1;
}

.request-title {
  font-weight: 700;
  margin-bottom: 4px;
}

.request-text {
  color: var(--gray-600);
  font-size: 14px;
  margin-bottom: 8px;
}

.request-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--gray-500);
}

.request-meta i {
  margin-right: 4px;
}

.request-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.btn-success-sm {
  padding: 8px 16px;
  background: var(--success);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-success-sm:hover {
  background: #059669;
}

.btn-danger-sm {
  padding: 8px 16px;
  background: var(--danger);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-danger-sm:hover {
  background: #dc2626;
}

/* User Menu */
.user-menu {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  background: var(--gray-100);
  border-radius: var(--border-radius);
  cursor: pointer;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.user-name {
  font-weight: 600;
  color: var(--gray-700);
}

/* About Page Styles */
.about-hero {
  background: var(--gradient-hero);
  padding: 80px 0;
  text-align: center;
  color: var(--white);
}

.about-hero-title {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 20px;
}

.about-hero-text {
  font-size: 20px;
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
  opacity: 0.95;
}

.about-mission {
  padding: 80px 0;
  background: var(--white);
}

.mission-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.mission-text {
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 20px;
}

.mission-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.mission-feature {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mission-feature i {
  color: var(--success);
  font-size: 20px;
}

.mission-image img {
  width: 100%;
  max-width: 380px;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.15));
}

.how-it-works {
  padding: 80px 0;
  background: var(--gray-50);
}

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

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.step-card {
  background: var(--white);
  padding: 32px;
  border-radius: var(--border-radius-lg);
  text-align: center;
  position: relative;
  box-shadow: var(--shadow);
}

.step-number {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  background: var(--yellow);
  color: var(--gray-900);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
}

.step-icon {
  font-size: 48px;
  color: var(--primary);
  margin: 20px 0 16px;
}

.step-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-text {
  color: var(--gray-600);
  line-height: 1.6;
}

.benefits {
  padding: 80px 0;
  background: var(--white);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.benefit-card {
  background: var(--gray-50);
  padding: 32px;
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.benefit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.benefit-icon {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 16px;
}

.benefit-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.benefit-text {
  color: var(--gray-600);
  line-height: 1.6;
}

.stats-section {
  padding: 80px 0;
  background: var(--gradient-primary);
  color: var(--white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
}

.stats-item {
  text-align: center;
}

.stats-value {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 8px;
}

.stats-label {
  font-size: 16px;
  opacity: 0.95;
}

.cta-section {
  padding: 80px 0;
  background: var(--gray-50);
}

.cta-card {
  background: var(--white);
  padding: 60px;
  border-radius: var(--border-radius-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.cta-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-text {
  font-size: 18px;
  color: var(--gray-600);
  margin-bottom: 32px;
}

/* Floating Social Widget */
.social-floater {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.social-floater a {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 20px;
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s, box-shadow 0.3s;
}

.social-floater a:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-lg);
}

.social-floater .floater-instagram {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.social-floater .floater-whatsapp {
  background: #25d366;
}

.social-floater .floater-email {
  background: var(--yellow);
  color: var(--gray-900);
}

@media (max-width: 640px) {
  .social-floater {
    right: 12px;
    gap: 8px;
  }

  .social-floater a {
    width: 40px;
    height: 40px;
    font-size: 17px;
  }
}

/* Responsive Design */
@media (max-width: 968px) {
  .nav {
    display: none;
  }

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

  .hero-content {
    flex-direction: column;
    text-align: center;
  }

  .hero-text {
    padding-bottom: 40px;
  }

  .hero-image {
    max-width: 520px;
  }

  .hero-features {
    align-items: center;
  }

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

  .hero-title {
    font-size: 36px;
  }

  .publications-layout {
    flex-direction: column;
  }

  .filters-sidebar {
    width: 100%;
  }

  .dashboard-layout,
  .admin-layout,
  .submit-layout {
    flex-direction: column;
  }

  .dashboard-sidebar,
  .admin-sidebar {
    width: 100%;
  }

  .publication-layout {
    flex-direction: column;
  }

  .publication-sidebar {
    width: 100%;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .charts-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 28px;
  }

  .section-title {
    font-size: 28px;
  }

  .page-title {
    font-size: 32px;
  }

  .features-grid,
  .publications-grid,
  .authors-grid,
  .benefits-grid {
    grid-template-columns: 1fr;
  }

  .category-filter {
    flex-direction: column;
  }

  .category-btn {
    width: 100%;
    justify-content: center;
  }

  .publications-toolbar {
    flex-direction: column;
  }
}

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--gray-100);
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
  font-size: 14px;
}

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

.lang-btn i:first-child {
  color: var(--primary);
}

.lang-btn i:last-child {
  font-size: 10px;
  color: var(--gray-500);
  transition: transform 0.2s;
}

.lang-dropdown.active + .lang-btn i:last-child,
.lang-btn:focus + .lang-dropdown.active ~ .lang-btn i:last-child {
  transform: rotate(180deg);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s;
  z-index: 100;
  min-width: 100px;
}

.lang-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: block;
  width: 100%;
  padding: 10px 16px;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.2s;
  font-size: 14px;
}

.lang-option:hover {
  background: var(--gray-100);
}

.lang-option.active {
  background: var(--primary);
  color: var(--white);
}

.lang-option:first-child {
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.lang-option:last-child {
  border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* Mobile Language Switcher */
.mobile-lang-switcher {
  border-top: 1px solid var(--gray-200);
  padding-top: 16px;
  margin-top: 16px;
}

.mobile-lang-title {
  font-size: 12px;
  color: var(--gray-500);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mobile-lang-options {
  display: flex;
  gap: 8px;
}

.mobile-lang-btn {
  flex: 1;
  padding: 10px 16px;
  background: var(--gray-100);
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
}

.mobile-lang-btn:hover {
  border-color: var(--primary);
}

.mobile-lang-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

/* Page Content Styles */
.page-content {
  padding: 60px 0;
}

.page-content-box {
  background: var(--white);
  padding: 40px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}

.page-content-box h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--gray-900);
}

.page-content-box h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 24px 0 12px;
  color: var(--gray-800);
}

.page-content-box p {
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-content-box ul {
  margin-left: 24px;
  margin-bottom: 16px;
  color: var(--gray-600);
  line-height: 1.8;
}

.page-content-box ul li {
  margin-bottom: 8px;
}

/* ============================================
   EXTRA STYLES — PHP VERSION ADDITIONS
   ============================================ */

/* Page header (used in publications, support, privacy etc) */
.page-header {
  background: var(--gradient-hero);
  padding: 56px 0 48px;
  color: var(--white);
  text-align: center;
}
.page-title {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.2;
}
.page-subtitle {
  font-size: 18px;
  opacity: 0.85;
  margin-bottom: 24px;
}
.page-content { padding: 60px 0 80px; }
.page-content-box {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  max-width: 900px;
  margin: 0 auto;
}
.page-content-box h2 { font-size: 24px; font-weight: 700; margin: 0 0 16px; color: var(--gray-900); }
.page-content-box h3 { font-size: 18px; font-weight: 700; margin: 28px 0 10px; color: var(--gray-900); }
.page-content-box p { color: var(--gray-600); line-height: 1.7; margin-bottom: 12px; }
.page-content-box ul { color: var(--gray-600); padding-left: 20px; line-height: 1.8; margin-bottom: 12px; }

/* Search bar */
.search-bar {
  display: flex;
  max-width: 520px;
  margin: 0 auto;
  background: rgba(255,255,255,0.15);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.3);
}
.search-bar input {
  flex: 1;
  padding: 13px 18px;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 15px;
  outline: none;
}
.search-bar input::placeholder { color: rgba(255,255,255,0.65); }
.search-btn {
  padding: 13px 20px;
  background: var(--yellow);
  border: none;
  color: var(--gray-900);
  cursor: pointer;
  font-size: 16px;
  transition: opacity 0.2s;
}
.search-btn:hover { opacity: 0.9; }

/* Publications page layout */
.publications-page { padding: 48px 0 80px; }
.publications-layout { display: grid; grid-template-columns: 240px 1fr; gap: 32px; }
.filters-sidebar { position: sticky; top: 88px; align-self: start; }
.filter-section { background: var(--white); border-radius: var(--border-radius); padding: 20px; margin-bottom: 16px; border: 1px solid var(--gray-200); }
.filter-title { font-size: 14px; font-weight: 700; color: var(--gray-700); margin-bottom: 14px; text-transform: uppercase; letter-spacing: 0.5px; }
.filter-option { display: flex; align-items: center; gap: 10px; padding: 6px 0; cursor: pointer; font-size: 14px; color: var(--gray-600); }
.filter-option input { accent-color: var(--primary); }

.publications-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.results-count { font-size: 14px; color: var(--gray-500); }
.sort-select { padding: 8px 14px; border: 1px solid var(--gray-200); border-radius: 8px; font-size: 14px; background: var(--white); cursor: pointer; }

/* Authors section */
.authors-section { padding: 48px 0 80px; }
.authors-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.authors-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }

/* Author profile */
.author-profile-section { padding: 48px 0 80px; }
.author-profile-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; background: var(--white); border-radius: var(--border-radius-lg); padding: 32px; margin-bottom: 24px; border: 1px solid var(--gray-200); box-shadow: var(--shadow-sm); flex-wrap: wrap; }
.author-profile-info-group { display: flex; gap: 20px; align-items: flex-start; }
.author-profile-avatar img { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; border: 3px solid var(--yellow); }
.author-profile-name { font-size: 26px; font-weight: 800; margin-bottom: 4px; }
.author-id { font-size: 14px; color: var(--primary); font-weight: 600; margin-bottom: 4px; }
.author-affiliation { font-size: 14px; color: var(--gray-500); margin-bottom: 10px; }
.author-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.badge { padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge-primary { background: var(--yellow-bg); color: var(--yellow-dark); }
.author-profile-actions { display: flex; gap: 10px; flex-shrink: 0; }
.author-stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.profile-section { background: var(--white); border-radius: var(--border-radius-lg); padding: 28px; margin-bottom: 20px; border: 1px solid var(--gray-200); }
.profile-section-title { font-size: 20px; font-weight: 700; margin-bottom: 16px; }
.profile-bio { color: var(--gray-600); line-height: 1.7; }
.interests-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.interest-tag { padding: 6px 14px; background: var(--yellow-bg); color: var(--yellow-dark); border-radius: 20px; font-size: 13px; font-weight: 600; }

/* Publication detail */
.publication-detail-section { padding: 48px 0 80px; }
.publication-layout { display: grid; grid-template-columns: 1fr 320px; gap: 32px; align-items: start; }
.publication-breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--gray-500); margin-bottom: 20px; }
.publication-breadcrumb a { color: var(--primary); text-decoration: none; }
.publication-category-badge { display: inline-flex; align-items: center; gap: 6px; background: var(--yellow-bg); color: var(--yellow-dark); padding: 6px 14px; border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 16px; }
.publication-title { font-size: 30px; font-weight: 800; margin-bottom: 16px; line-height: 1.3; }
.publication-meta { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; font-size: 14px; color: var(--gray-500); margin-bottom: 24px; }
.publication-authors { display: flex; align-items: center; gap: 10px; }
.pub-author-avatar { flex-shrink: 0; }
.sidebar-author-divider { height: 1px; background: var(--gray-100); margin: 12px 0; }
.publication-image { border-radius: var(--border-radius-lg); overflow: hidden; margin-bottom: 28px; }
.publication-image img { width: 100%; height: 300px; object-fit: cover; }
.publication-content h2 { font-size: 22px; font-weight: 700; margin: 28px 0 12px; color: var(--gray-900); }
.publication-content p { color: var(--gray-600); line-height: 1.75; margin-bottom: 16px; }
.keywords { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.keyword-tag { padding: 4px 12px; background: var(--gray-100); color: var(--gray-700); border-radius: 20px; font-size: 13px; }
.publication-actions { display: flex; gap: 12px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--gray-200); flex-wrap: wrap; }
.action-btn { display: flex; align-items: center; gap: 8px; padding: 10px 20px; border: 1.5px solid var(--gray-200); border-radius: 10px; background: var(--white); cursor: pointer; font-size: 14px; font-weight: 600; color: var(--gray-700); transition: all 0.2s; text-decoration: none; }
.action-btn:hover { border-color: var(--primary); color: var(--primary); }
.publication-header-card { background: var(--white); border-radius: var(--border-radius-lg); padding: 32px; margin-bottom: 24px; border: 1px solid var(--gray-200); box-shadow: var(--shadow-sm); }
.sidebar-card { background: var(--white); border-radius: var(--border-radius-lg); padding: 24px; margin-bottom: 20px; border: 1px solid var(--gray-200); }
.sidebar-title { font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.metrics-list, .info-list { display: flex; flex-direction: column; gap: 12px; }
.metric-item { display: flex; align-items: center; gap: 14px; }
.metric-value { font-size: 22px; font-weight: 800; }
.metric-label { font-size: 12px; color: var(--gray-500); }
.info-item { display: flex; justify-content: space-between; font-size: 14px; padding: 6px 0; border-bottom: 1px solid var(--gray-100); }

/* Dashboard */
.dashboard { padding: 48px 0 80px; }
.dashboard-layout { display: grid; grid-template-columns: 240px 1fr; gap: 32px; }
.dashboard-sidebar { position: sticky; top: 88px; align-self: start; }
.dashboard-menu { background: var(--white); border-radius: var(--border-radius-lg); padding: 12px; border: 1px solid var(--gray-200); }
.dashboard-menu-item { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-radius: 10px; color: var(--gray-600); text-decoration: none; font-weight: 500; font-size: 14px; transition: all 0.2s; margin-bottom: 2px; }
.dashboard-menu-item:hover, .dashboard-menu-item.active { background: var(--yellow-bg); color: var(--primary); }
.dashboard-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; }
.dashboard-title { font-size: 28px; font-weight: 800; }
.dashboard-stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; }
.stat-icon-primary { background: rgba(27,107,125,0.1); color: var(--primary); }
.stat-icon-success { background: rgba(16,185,129,0.1); color: var(--success); }
.stat-icon-warning { background: rgba(212,160,30,0.1); color: var(--warning); }
.stat-icon-info { background: rgba(27,107,125,0.08); color: var(--primary); }

/* Admin */
.admin-dashboard { padding: 48px 0 80px; }
.admin-layout { display: grid; grid-template-columns: 240px 1fr; gap: 32px; }
.admin-sidebar { position: sticky; top: 88px; align-self: start; }
.admin-main { background: var(--white); border-radius: var(--border-radius-lg); padding: 32px; border: 1px solid var(--gray-200); }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; flex-wrap: wrap; gap: 12px; }
.admin-title { font-size: 26px; font-weight: 800; }
.admin-actions { display: flex; gap: 10px; }
.admin-stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }

/* About page extras */
.about-hero { background: var(--gradient-hero); padding: 80px 0; color: #fff; text-align: center; }
.about-hero-title { font-size: 52px; font-weight: 800; margin-bottom: 16px; }
.about-hero-text { font-size: 20px; opacity: 0.85; max-width: 600px; margin: 0 auto; }
.about-mission { padding: 72px 0; background: var(--white); }
.mission-grid { display: grid; grid-template-columns: 1fr 400px; gap: 48px; align-items: center; }
.mission-text { color: var(--gray-600); line-height: 1.7; }
.mission-image img { width: 100%; border-radius: var(--border-radius-lg); }
.about-stats { padding: 56px 0; background: var(--gray-50); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.how-it-works { padding: 72px 0; background: var(--gray-50); }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; }
.step-card { background: var(--white); border-radius: var(--border-radius-lg); padding: 28px 20px; text-align: center; border: 1px solid var(--gray-200); position: relative; }
.step-number { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--yellow); color: var(--gray-900); width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 800; }
.step-icon { font-size: 32px; color: var(--primary); margin: 12px 0 16px; }
.step-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.step-text { font-size: 14px; color: var(--gray-500); }

/* Responsive adjustments */
@media (max-width: 1024px) {
  .publications-layout { grid-template-columns: 200px 1fr; }
  .publication-layout { grid-template-columns: 1fr; }
  .mission-grid { grid-template-columns: 1fr; }
  .author-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .publications-layout { grid-template-columns: 1fr; }
  .filters-sidebar { display: none; }
  .dashboard-layout, .admin-layout { grid-template-columns: 1fr; }
  .dashboard-sidebar, .admin-sidebar { position: static; }
  .hero-content { flex-direction: column; }
  .hero-image { max-width: 100%; flex: none; }
  .hero-image img { min-height: 300px; }
  .page-title { font-size: 28px; }
  .author-profile-header { flex-direction: column; }
  .author-stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .publication-title { font-size: 22px; }
  .auth-card { padding: 24px 16px; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}