/* ===== Article Page Styles ===== */

/* Article Hero */
.article-hero {
  position: relative;
  width: 100%;
  height: 400px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.2) 50%, transparent 100%);
}

.article-hero-content {
  position: relative;
  z-index: 1;
  padding: 2rem;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
}

.article-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: white;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.article-hero .subtitle {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
}

/* Article Container */
.article-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

/* Article Content */
.article-content {
  font-size: 1.1rem;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary, #DD0031);
}

.article-content h3 {
  font-size: 1.35rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content strong {
  font-weight: 600;
}

/* Feature Cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature-card {
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border, #E5E7EB);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-card .icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.95rem;
  margin: 0;
  opacity: 0.8;
}

/* Tech Stack Section */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: transform 0.2s ease;
}

.tech-badge:hover {
  transform: scale(1.05);
}

/* Architecture Diagram */
.architecture-box {
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--border, #E5E7EB);
  margin: 2rem 0;
}

.architecture-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 1.5rem 0;
}

.arch-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  text-align: center;
  min-width: 120px;
}

.arch-item .icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.arch-item span {
  font-weight: 600;
  font-size: 0.9rem;
}

.arch-arrow {
  font-size: 1.5rem;
  opacity: 0.5;
}

/* Code Block */
.code-block {
  background: #1e1e1e;
  border-radius: 12px;
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.code-block code {
  color: #d4d4d4;
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Info Box */
.info-box {
  padding: 1.25rem 1.5rem;
  border-radius: 12px;
  border-left: 4px solid var(--primary, #DD0031);
  margin: 1.5rem 0;
}

.info-box.tip {
  border-left-color: #10b981;
}

.info-box.warning {
  border-left-color: #f59e0b;
}

/* Back Button */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 10px;
  font-weight: 600;
  transition: all 0.2s ease;
}

.back-link:hover {
  transform: translateX(-4px);
}

/* CTA Section */
.cta-section {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--border, #E5E7EB);
}

.cta-section a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  transition: all 0.2s ease;
}

.cta-section a:hover {
  transform: translateY(-2px);
}

/* Animation */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

.fade-in-delay-1 { animation-delay: 0.1s; }
.fade-in-delay-2 { animation-delay: 0.2s; }
.fade-in-delay-3 { animation-delay: 0.3s; }
.fade-in-delay-4 { animation-delay: 0.4s; }

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .article-hero {
    height: 300px;
  }
  
  .article-hero h1 {
    font-size: 1.75rem;
  }
  
  .article-container {
    padding: 2rem 1rem;
  }
  
  .article-content {
    font-size: 1rem;
  }
  
  .article-content h2 {
    font-size: 1.5rem;
  }
  
  .architecture-flow {
    flex-direction: column;
  }
  
  .arch-arrow {
    transform: rotate(90deg);
  }
}

/* Dark Mode Adjustments */
@media (prefers-color-scheme: dark) {
  .feature-card,
  .architecture-box,
  .cta-section {
    background: rgba(31, 41, 55, 0.5);
    border-color: rgba(55, 65, 81, 0.5);
  }
  
  .info-box {
    background: rgba(31, 41, 55, 0.5);
  }
  
  .arch-item {
    background: rgba(17, 24, 39, 0.8);
  }
}

.dark .feature-card,
.dark .architecture-box,
.dark .cta-section {
  background: rgba(31, 41, 55, 0.5);
  border-color: rgba(55, 65, 81, 0.5);
}

.dark .info-box {
  background: rgba(31, 41, 55, 0.5);
}

.dark .arch-item {
  background: rgba(17, 24, 39, 0.8);
}

.light .feature-card,
.light .architecture-box,
.light .cta-section {
  background: rgba(255, 255, 255, 0.8);
}

.light .info-box {
  background: rgba(249, 250, 251, 0.8);
}

.light .arch-item {
  background: rgba(243, 244, 246, 0.8);
}