/* Layout styles for blog application
 * 
 * This file provides layout-related styles including
 * grid system, navigation, containers, and page structure.
 */

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.container-narrow {
  max-width: 800px;
}

.container-wide {
  max-width: 1400px;
}

/* Main layout */
.main-wrapper {
  flex: 1;
  padding: 2rem 0;
}

/* Grid system */
.grid {
  display: grid;
  gap: 1.5rem;
}

.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);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Flex utilities */
.flex {
  display: flex;
}

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

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

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

.justify-center {
  justify-content: center;
}

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }

/* Header */
.site-header {
  background-color: var(--color-nav-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-dark);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

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

.nav-link {
  color: var(--color-nav-text);
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom-color: var(--color-primary-alpha-50);
}

.nav-link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme toggle button */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border-radius: 4px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--color-nav-text);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
  background-color: var(--color-nav-hover-bg);
  color: var(--color-primary);
}

/* Footer */
.site-footer {
  background-color: var(--color-footer);
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  margin-top: auto;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-link {
  color: var(--color-text-light);
  font-size: 0.875rem;
}

.footer-link:hover {
  color: var(--color-primary);
}

/* Page header */
.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

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

.page-title {
  margin-bottom: 0;
}

.page-subtitle {
  color: var(--color-text-light);
  margin-top: 0.25rem;
}

/* Post list */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Post card specific */
.post-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.post-card-title {
  margin-bottom: 0;
  font-size: 1.25rem;
}

.post-card-title a {
  color: var(--color-text-dark);
}

.post-card-title a:hover {
  color: var(--color-primary);
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-light-2);
}

.post-card-meta-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.post-card-content {
  color: var(--color-text-light);
  line-height: 1.6;
}

.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.post-card-tags {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

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

.post-detail-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.post-detail-title {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.post-detail-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  color: var(--color-text-light-2);
}

.post-detail-content {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text);
}

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

.post-detail-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.post-detail-tags {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 6rem;
}

.sidebar-section {
  background-color: var(--color-box-body);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.sidebar-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

/* Two column layout */
.two-column {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2rem;
}

@media (max-width: 1024px) {
  .two-column {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    position: static;
  }
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  margin-top: 2rem;
}

.pagination-item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.5rem;
  border-radius: 4px;
  font-size: 0.875rem;
  color: var(--color-text);
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.pagination-item:hover {
  background-color: var(--color-hover);
  text-decoration: none;
}

.pagination-item.active {
  background-color: var(--color-primary);
  color: var(--color-primary-contrast);
}

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

/* Mobile menu */
@media (max-width: 768px) {
  .site-header .container {
    height: 3.5rem;
  }
  
  .main-nav {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
}

@media (min-width: 769px) {
  .mobile-menu-btn {
    display: none;
  }
}