/* 
==================================================
  HEADER
================================================== 
*/
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: transform var(--transition-normal), background-color var(--transition-normal);
}

.site-header.header-hidden {
  transform: translateY(-100%);
}

.site-header.header-scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.05em;
}

.logo-text {
  color: var(--text-primary);
}

.logo-icon {
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  gap: var(--spacing-xl);
}

.nav-link {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  left: 0;
  transition: transform var(--transition-normal);
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

/* 
==================================================
  HERO SECTION
================================================== 
*/
.hero-section {
  padding-top: var(--spacing-xxl);
  padding-bottom: var(--spacing-3xl);
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  overflow: hidden;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-md);
  animation: fadeUp 1s ease-out forwards;
}

.category-badge {
  display: inline-block;
  padding: 6px 12px;
  background-color: rgba(30, 30, 30, 0.05);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 90%;
}

.read-more-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 16px 32px;
  background-color: var(--brand-dark);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

.read-more-btn .arrow {
  transition: transform var(--transition-normal);
}

.read-more-btn:hover {
  background-color: #333333;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.read-more-btn:hover .arrow {
  transform: translateX(4px);
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: fadeInRight 1.2s ease-out forwards;
}

.hero-image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
  transition: transform var(--transition-slow);
}

.hero-image-wrapper:hover .hero-image-placeholder {
  transform: scale(1.05);
}

/* 
==================================================
  ARTICLES GRID
================================================== 
*/
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.view-all {
  color: var(--text-tertiary);
  font-weight: 600;
  font-size: 0.9rem;
}

.view-all:hover {
  color: var(--brand-dark);
}

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

.article-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  background-color: var(--bg-primary);
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card-image-wrapper {
  width: 100%;
  aspect-ratio: 16/10;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.card-image {
  width: 100%;
  height: 100%;
  transition: transform var(--transition-slow);
}

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

.card-content {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-category {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: var(--spacing-xs);
}

.card-title {
  font-size: 1.125rem;
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.card-date {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* 
==================================================
  FOOTER
================================================== 
*/
.site-footer {
  background-color: var(--bg-secondary);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  margin-top: var(--spacing-3xl);
  border-top: 1px solid rgba(0,0,0,0.05);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(0,0,0,0.1);
}

.footer-logo {
  font-weight: 800;
  font-size: 1.5rem;
  color: #B0B8C1;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.copyright {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

/* 
==================================================
  ANIMATIONS
================================================== 
*/
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

/* 
==================================================
  RESPONSIVE DESIGN CHANNELS
================================================== 
*/
@media (max-width: 1024px) {
  .hero-title { font-size: 2.5rem; }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: 0;
    overflow: hidden;
    background-color: var(--bg-primary);
    transition: height var(--transition-normal);
  }

  .main-nav.open {
    height: calc(100vh - var(--header-height));
    border-top: 1px solid rgba(0,0,0,0.05);
  }

  .nav-list {
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-lg);
  }
  
  .nav-link {
    font-size: 1.25rem;
    display: block;
  }

  .menu-toggle { display: block; }
  
  .menu-toggle.open .hamburger { background-color: transparent; }
  .menu-toggle.open .hamburger::before { transform: translateY(8px) rotate(45deg); }
  .menu-toggle.open .hamburger::after { transform: translateY(-8px) rotate(-45deg); }

  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .hero-content { align-items: center; text-align: center; }
  .hero-title { font-size: 2.25rem; }
  .hero-description { max-width: 100%; }
  
  .footer-top {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-lg);
  }
  
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .article-grid { grid-template-columns: 1fr; }
}