/* ============================================
   HFSP Journal - Modern Design System
   ============================================ */

/* CSS Variables - Design Tokens */
:root {
  /* Primary Colors */
  --color-primary: #1e3a5f;
  --color-primary-light: #2d5a87;
  --color-primary-dark: #0f2744;
  
  /* Accent Colors */
  --color-accent: #3b82f6;
  --color-accent-light: #60a5fa;
  --color-accent-dark: #2563eb;
  
  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-impact: #dc2626;
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Merriweather', Georgia, serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* Container */
  --container-max: 1280px;
  --container-padding: 1.5rem;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-gray-900);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--spacing-4);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   Layout
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--spacing-16) 0;
}

.section-sm {
  padding: var(--spacing-8) 0;
}

.grid {
  display: grid;
  gap: var(--spacing-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-lg);
}

.header-top {
  background: var(--color-primary-dark);
  padding: var(--spacing-2) 0;
  font-size: var(--text-sm);
  color: var(--color-gray-300);
}

.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-main {
  padding: var(--spacing-4) 0;
}

.header-main .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.logo-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

.logo-subtitle {
  font-size: var(--text-sm);
  color: var(--color-gray-300);
  font-weight: 400;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.nav-link {
  color: var(--color-gray-200);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
  background: var(--color-accent);
}

/* Mobile Navigation */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: var(--text-2xl);
  cursor: pointer;
  padding: var(--spacing-2);
}

@media (max-width: 1024px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-primary-dark);
    flex-direction: column;
    padding: var(--spacing-4);
    gap: var(--spacing-2);
  }
  
  .nav.active {
    display: flex;
  }
  
  .nav-link {
    width: 100%;
    text-align: center;
    padding: var(--spacing-3) var(--spacing-4);
  }
  
  .mobile-menu-btn {
    display: block;
  }
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-accent) 100%);
  padding: var(--spacing-16) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: var(--spacing-12);
  align-items: center;
}

@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.hero-content h1 {
  font-size: var(--text-5xl);
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
  font-weight: 800;
}

.hero-content p {
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-6);
  max-width: 600px;
}

.hero-badges {
  display: flex;
  gap: var(--spacing-4);
  flex-wrap: wrap;
}

@media (max-width: 1024px) {
  .hero-badges {
    justify-content: center;
  }
}

.hero-badge {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: var(--spacing-3) var(--spacing-5);
  border-radius: var(--radius-lg);
  color: var(--color-white);
  font-size: var(--text-sm);
}

.hero-badge strong {
  display: block;
  font-size: var(--text-lg);
}

.hero-image {
  display: flex;
  justify-content: center;
}

.journal-cover {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-4);
  transform: rotate(3deg);
  transition: transform var(--transition-slow);
}

.journal-cover:hover {
  transform: rotate(0deg) scale(1.02);
}

.journal-cover img {
  border-radius: var(--radius-md);
  max-width: 280px;
}

/* ============================================
   Impact Factor Badge
   ============================================ */

.impact-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-3);
  background: linear-gradient(135deg, var(--color-impact) 0%, #b91c1c 100%);
  color: var(--color-white);
  padding: var(--spacing-4) var(--spacing-6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.impact-badge-label {
  font-size: var(--text-sm);
  font-weight: 500;
  opacity: 0.9;
}

.impact-badge-value {
  font-size: var(--text-3xl);
  font-weight: 800;
}

/* ============================================
   Stats Section
   ============================================ */

.stats {
  background: var(--color-white);
  padding: var(--spacing-12) 0;
  margin-top: calc(var(--spacing-8) * -1);
  position: relative;
  z-index: 10;
}

.stats .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-8);
}

@media (max-width: 768px) {
  .stats .container {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat-card {
  text-align: center;
  padding: var(--spacing-6);
}

.stat-icon {
  width: 48px;
  height: 48px;
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-4);
  color: var(--color-primary);
}

.stat-value {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--spacing-1);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  font-weight: 500;
}

/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-6);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-4);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0;
}

.card-text {
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* ============================================
   Article Cards
   ============================================ */

.article-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  padding: var(--spacing-6);
  transition: all var(--transition-base);
}

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

.article-meta {
  display: flex;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-3);
  flex-wrap: wrap;
}

.article-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
  background: var(--color-gray-100);
  color: var(--color-gray-600);
}

.article-tag.volume {
  background: var(--color-primary);
  color: var(--color-white);
}

.article-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-2);
  color: var(--color-gray-900);
  line-height: 1.4;
}

.article-title a {
  color: inherit;
}

.article-title a:hover {
  color: var(--color-accent);
}

.article-authors {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-3);
}

.article-abstract {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: 1.7;
  margin-bottom: var(--spacing-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-actions {
  display: flex;
  gap: var(--spacing-3);
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--color-gray-100);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background: var(--color-gray-200);
  color: var(--color-gray-900);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: var(--color-white);
}

.btn-accent:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--color-white);
}

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

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

.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--text-base);
}

/* ============================================
   Archive Table
   ============================================ */

.archive-section {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.archive-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  padding: var(--spacing-6);
  color: var(--color-white);
}

.archive-header h2 {
  color: var(--color-white);
  margin: 0;
}

.archive-table {
  width: 100%;
  border-collapse: collapse;
}

.archive-table th,
.archive-table td {
  padding: var(--spacing-3) var(--spacing-4);
  text-align: center;
  border-bottom: 1px solid var(--color-gray-100);
}

.archive-table th {
  background: var(--color-gray-50);
  font-weight: 600;
  color: var(--color-gray-700);
  font-size: var(--text-sm);
}

.archive-table tr:hover {
  background: var(--color-gray-50);
}

.archive-table .year-cell {
  font-weight: 700;
  color: var(--color-primary);
  text-align: left;
  padding-left: var(--spacing-6);
}

.archive-table .volume-cell {
  background: var(--color-gray-100);
  font-weight: 600;
}

.archive-table a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-gray-100);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.archive-table a:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: scale(1.1);
}

.archive-table tr.current-year {
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.1) 0%, transparent 100%);
}

.archive-table tr.current-year .year-cell {
  color: var(--color-accent);
}

/* ============================================
   Sidebar
   ============================================ */

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.sidebar-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.sidebar-header {
  background: var(--color-gray-50);
  padding: var(--spacing-4) var(--spacing-5);
  border-bottom: 1px solid var(--color-gray-100);
}

.sidebar-header h3 {
  font-size: var(--text-base);
  margin: 0;
  color: var(--color-gray-700);
}

.sidebar-content {
  padding: var(--spacing-5);
}

/* Quick Submit Card */
.submit-card {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: var(--color-white);
  padding: var(--spacing-6);
  text-align: center;
}

.submit-card h3 {
  color: var(--color-white);
  margin-bottom: var(--spacing-3);
}

.submit-card p {
  opacity: 0.9;
  margin-bottom: var(--spacing-4);
  font-size: var(--text-sm);
}

.submit-card .btn {
  background: var(--color-white);
  color: var(--color-accent);
  width: 100%;
}

.submit-card .btn:hover {
  background: var(--color-gray-100);
  color: var(--color-accent-dark);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-12);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.footer-brand p {
  font-size: var(--text-sm);
  line-height: 1.7;
}

.footer-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-4);
}

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

.footer-links li {
  margin-bottom: var(--spacing-2);
}

.footer-links a {
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-gray-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-4);
}

.footer-bottom p {
  font-size: var(--text-sm);
  margin: 0;
}

.footer-social {
  display: flex;
  gap: var(--spacing-3);
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: var(--color-gray-800);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

/* ============================================
   Forms
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--text-base);
  font-family: inherit;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-hint {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-top: var(--spacing-1);
}

/* ============================================
   Page Header
   ============================================ */

.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  padding: var(--spacing-12) 0;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header h1 {
  color: var(--color-white);
  margin-bottom: var(--spacing-3);
}

.page-header p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--text-lg);
  max-width: 600px;
}

.breadcrumb {
  display: flex;
  gap: var(--spacing-2);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-4);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
}

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

.breadcrumb span {
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   Content Sections
   ============================================ */

.content-section {
  padding: var(--spacing-12) 0;
}

.content-section h2 {
  margin-bottom: var(--spacing-6);
}

.content-section p {
  color: var(--color-gray-600);
  font-size: var(--text-lg);
  line-height: 1.8;
}

/* ============================================
   Feature List
   ============================================ */

.feature-list {
  list-style: none;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
  padding: var(--spacing-4) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-icon {
  width: 24px;
  height: 24px;
  background: var(--color-success);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-text {
  color: var(--color-gray-700);
  line-height: 1.6;
}

/* ============================================
   Team/Editorial Board Cards
   ============================================ */

.team-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-6);
  text-align: center;
  transition: all var(--transition-base);
}

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

.team-avatar {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-full);
  margin: 0 auto var(--spacing-4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--text-3xl);
  font-weight: 700;
}

.team-name {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-1);
}

.team-role {
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: var(--spacing-2);
}

.team-affiliation {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

/* ============================================
   Timeline (for Peer Review)
   ============================================ */

.timeline {
  position: relative;
  padding-left: var(--spacing-10);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-gray-200);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-8);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: calc(var(--spacing-10) * -1 + 6px);
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  border: 3px solid var(--color-white);
  box-shadow: var(--shadow-md);
}

.timeline-content {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-5);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
}

.timeline-title {
  font-weight: 600;
  margin-bottom: var(--spacing-2);
}

.timeline-text {
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  margin: 0;
}

.timeline-time {
  font-size: var(--text-xs);
  color: var(--color-accent);
  font-weight: 600;
  margin-top: var(--spacing-2);
}

/* ============================================
   Utilities
   ============================================ */

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

.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.hidden { display: none; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }

/* ============================================
   Animations
   ============================================ */

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease forwards;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* ============================================
   Archive Table Wrapper
   ============================================ */

.archive-table-wrapper {
  overflow-x: auto;
}

.archive-table .year-col {
  text-align: left;
  width: 80px;
}

.archive-table .vol-col {
  width: 60px;
}

.archive-table .issue-col {
  width: 50px;
}

.archive-table .issue-cell a {
  margin: 0 auto;
}

.archive-header p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-sm);
  margin: var(--spacing-2) 0 0;
}

/* ============================================
   Responsive Utilities
   ============================================ */

@media (max-width: 768px) {
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  
  .hero-content h1 {
    font-size: var(--text-3xl);
  }
  
  .hero-content p {
    font-size: var(--text-base);
  }
  
  .section {
    padding: var(--spacing-10) 0;
  }
  
  .page-header {
    padding: var(--spacing-8) 0;
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .header, .footer, .sidebar, .btn {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .article-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}