/* Layout System */

/* Container */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* Navigation */
nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

nav a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.25s ease;
  font-size: 0.95rem;
}

nav a:hover {
  color: var(--text-primary);
}

/* Mobile Navigation Improvements */
@media (max-width: 640px) {
  nav {
    gap: 0.75rem;
  }

  nav a {
    font-size: 0.875rem;
  }

  .logo {
    font-size: 1.25rem;
  }

  header {
    padding: 1rem 0;
  }
}

/* Main Content Area */
main {
  min-height: calc(100vh - 200px);
  padding: var(--space-12) 0;
}

@media (max-width: 640px) {
  main {
    padding: var(--space-6) 0;
  }
}

/* Hero Section */
.hero {
  text-align: center;
  margin-bottom: 2rem;
  padding: 2.5rem 0 1rem;
}

.hero h1 {
  margin-bottom: 0.75rem;
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Search and Filter Section */
.controls {
  margin-bottom: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .controls {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* Post Grid */
.post-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .post-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.125rem;
  }
}

@media (min-width: 1024px) {
  .post-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.125rem;
  }
}

/* Single Post Layout */
.post-content {
  max-width: 800px;
  margin: 0 auto;
}

.post-header {
  margin-bottom: var(--space-8);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  margin: var(--space-4) 0;
  color: var(--text-tertiary);
  font-size: var(--text-sm);
}

.post-body {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.post-body h2 {
  margin-top: var(--space-12);
}

.post-body h3 {
  margin-top: var(--space-8);
}

.post-body img {
  width: 100%;
  border-radius: var(--radius-lg);
  margin: var(--space-8) 0;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-12) 0 var(--space-6);
  margin-top: var(--space-16);
}

.footer-content {
  text-align: center;
  color: var(--text-tertiary);
}

/* Social Links Section */
.social-section {
  text-align: center;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--border-color);
}

.social-heading {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  letter-spacing: 0.05em;
}

.social-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-6);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.social-link:hover {
  background: var(--accent-primary);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(245, 52, 0, 0.3);
  border-color: var(--accent-primary);
}

.social-link svg {
  width: 24px;
  height: 24px;
}

/* Mobile optimization */
@media (max-width: 640px) {
  .social-section {
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-6);
  }

  .social-heading {
    font-size: var(--text-base);
  }

  .social-links {
    gap: var(--space-5);
  }

  .social-link {
    width: 44px;
    height: 44px;
  }

  .social-link svg {
    width: 22px;
    height: 22px;
  }
}

/* Utility Classes */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

.justify-between {
  justify-content: space-between;
}

.gap-4 {
  gap: var(--space-4);
}

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

.hidden {
  display: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}