/* ================================================================
   Layout - Container, Grid & Page Structure
   ================================================================ */

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--narrow {
  max-width: var(--container-width);
}

.container--wide {
  max-width: var(--container-full);
}

/* --- Site Main --- */
.site-main {
  min-height: calc(100vh - var(--header-height) - 200px);
  padding-top: var(--header-height);
}

/* --- Hero Section --- */
.hero {
  padding: var(--space-20) 0 var(--space-16);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.hero-avatar {
  flex-shrink: 0;
}

.hero-avatar img {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 3px solid var(--color-bg-elevated);
  box-shadow: 0 0 0 2px var(--color-border);
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.hero-bio {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 540px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-5);
  margin-top: var(--space-4);
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.hero-stats li strong {
  display: inline-block;
  margin-right: 4px;
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

/* --- Post modified notice & in-progress notice --- */
.post-modified-notice {
  display: inline-block;
  margin-top: var(--space-2);
  padding: 4px var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.post-progress-notice {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding: 4px var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-warning-text);
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-sm);
}

[data-theme="dark"] .post-progress-notice {
  color: var(--color-warning-text);
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning-border);
}

/* --- Section Spacing --- */
.section-posts,
.section-archives,
.section-categories,
.section-category,
.section-tags,
.section-tag {
  padding: var(--space-12) 0 var(--space-20);
}

/* --- Page Header --- */
.page-header {
  margin-bottom: var(--space-10);
}

.page-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.page-desc {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.post-count {
  display: inline-block;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* --- Breadcrumb --- */
.breadcrumb {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.breadcrumb a {
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

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

.breadcrumb .sep {
  margin: 0 var(--space-2);
  opacity: 0.5;
}

/* --- Empty State (canonical styles live in components.css) --- */

.home-highlights {
  padding: var(--space-10) 0 var(--space-4);
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.section-kicker {
  margin-bottom: var(--space-1);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-title {
  margin: 0;
  font-size: var(--text-2xl);
  letter-spacing: -0.02em;
}

.section-link {
  flex-shrink: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.section-link:hover {
  color: var(--color-accent);
}

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.highlight-card {
  display: flex;
  min-height: 190px;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-5);
  background: linear-gradient(145deg, var(--color-bg-elevated), var(--color-bg-alt));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 24px var(--color-shadow);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.highlight-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: 0 14px 34px var(--color-shadow-lg);
}

.highlight-category {
  padding: 2px var(--space-2);
  color: var(--color-accent);
  background-color: var(--color-accent-bg);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
}

.highlight-title {
  color: var(--color-text);
  font-size: var(--text-lg);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.highlight-excerpt {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.highlight-date {
  margin-top: auto;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
}

.post-list-container {
  --post-list-max: 960px;
  --post-cover-width: 32%;
  --post-grid-min: 280px;
  --post-list-gap: var(--space-6);
  max-width: var(--post-list-max);
}

.post-list-container[data-size="0"],
.post-list[data-size="0"] {
  --post-list-max: 760px;
  --post-cover-width: 24%;
  --post-grid-min: 220px;
  --post-list-gap: var(--space-4);
}

.post-list-container[data-size="25"],
.post-list[data-size="25"] {
  --post-list-max: 880px;
  --post-cover-width: 28%;
  --post-grid-min: 250px;
  --post-list-gap: var(--space-5);
}

.post-list-container[data-size="50"],
.post-list[data-size="50"],
.post-list-container:not([data-size]),
.post-list:not([data-size]) {
  --post-list-max: 1040px;
  --post-cover-width: 34%;
  --post-grid-min: 280px;
  --post-list-gap: var(--space-6);
}

.post-list-container[data-size="75"],
.post-list[data-size="75"] {
  --post-list-max: 1220px;
  --post-cover-width: 38%;
  --post-grid-min: 320px;
  --post-list-gap: var(--space-8);
}

.post-list-container[data-size="100"],
.post-list[data-size="100"] {
  --post-list-max: var(--container-full);
  --post-cover-width: 42%;
  --post-grid-min: 360px;
  --post-list-gap: var(--space-10);
}

/* --- Post List --- */
.post-list {
  display: flex;
  flex-direction: column;
  gap: var(--post-list-gap);
}

.post-list[data-layout="list"] {
  gap: var(--post-list-gap);
}

/* Two-column grid mode for archives / category / tag / home */
@media (min-width: 720px) {
  .post-list[data-layout="grid"] {
    display: grid;
    grid-template-columns: repeat(2, minmax(var(--post-grid-min), 1fr));
    gap: var(--post-list-gap);
  }
  .post-list[data-layout="grid"] .post-card {
    height: 100%;
    padding: var(--space-5);
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 24px var(--color-shadow);
  }

  .post-list[data-layout="grid"] .post-card-link {
    padding: 0;
  }
  /* In grid mode the cover image sits on top of the card body */
  .post-list[data-layout="grid"] .post-card-link {
    flex-direction: column;
  }
  .post-list[data-layout="grid"] .post-card-cover {
    aspect-ratio: 16 / 9;
  }
}

/* Compact mode: smaller cards with reduced padding */
.post-list[data-layout="compact"] .post-card {
  padding: var(--space-3) 0;
}
.post-list[data-layout="compact"] .post-card-cover {
  display: none;
}
.post-list[data-layout="compact"] .post-card-excerpt {
  display: none;
}

/* --- Archives List --- */
.archives-list {
  border-top: 1px solid var(--color-border);
}

.archive-year-group {
  padding-top: var(--space-2);
}

.archive-month-group {
  margin-bottom: var(--space-6);
}

.archive-month {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  padding-left: var(--space-1);
}

.archive-posts {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-border);
}

.archive-item {
  display: flex;
  align-items: baseline;
  gap: var(--space-6);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.15s ease;
}

.archive-item:hover {
  background-color: var(--color-bg-alt);
  margin: 0 calc(var(--space-4) * -1);
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  border-radius: var(--radius-md);
}

.archive-date {
  flex-shrink: 0;
  width: 50px;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.archive-link {
  color: var(--color-text);
  font-size: var(--text-base);
  font-weight: 500;
  transition: color 0.15s ease;
}

.archive-link:hover {
  color: var(--color-accent);
}

.archive-title {
  line-height: 1.5;
}

/* --- Category Grid --- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

/* --- Tag Cloud --- */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* --- Pagination --- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.pagination-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
}

.pagination-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: var(--color-accent-bg);
}

.pagination-info {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* --- Post Single Layout --- */
.post-single {
  padding: var(--space-12) 0 var(--space-16);
}

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

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.post-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: var(--space-5);
}

.post-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.post-cover {
  margin: var(--space-8) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.post-cover img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.reading-overview {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: var(--space-6) 0 var(--space-8);
  padding: var(--space-4) var(--space-5);
  color: var(--color-text-muted);
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg-alt));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
}

.reading-overview span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.reading-overview span::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
  opacity: 0.6;
}

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

.post-footer {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

/* --- Post Actions (share / copy link / upvote) --- */
.post-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.btn-share {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.btn-share:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.post-upvote {
  margin-left: auto;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.post-upvote strong {
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
}

/* --- Related posts --- */
.related-posts {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.related-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  letter-spacing: -0.01em;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-4);
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: linear-gradient(145deg, var(--color-bg-elevated), var(--color-bg-alt));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.related-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px var(--color-shadow);
}

.related-card-category {
  align-self: flex-start;
  padding: 1px var(--space-2);
  color: var(--color-accent);
  background-color: var(--color-accent-bg);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
}

.related-card-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card-date {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

/* --- Post Navigation --- */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all 0.15s ease;
}

.post-nav-link:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent-bg);
}

.post-nav-next {
  text-align: right;
  align-items: flex-end;
}

.post-nav-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.post-nav-title {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
}

/* --- Table of Contents --- */
.post-toc {
  padding: var(--space-4);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 6px 18px var(--color-shadow);
}

/* Hidden by default; components.css re-shows .post-toc--left inside
   .post-page-with-sidebar at >=1024px, and .post-toc--floating at >=1280px. */
.post-toc--left {
  display: none;
  position: sticky;
  top: calc(var(--header-height) + var(--space-4));
  max-height: calc(100vh - var(--header-height) - var(--space-8));
  overflow-y: auto;
}

.post-toc--floating {
  display: none;
}

@media (min-width: 1280px) {
  .post-toc--floating {
    position: fixed;
    left: var(--space-8);
    top: calc(var(--header-height) + var(--space-8));
    width: 200px;
    max-height: calc(100vh - var(--header-height) - var(--space-16));
    overflow-y: auto;
    display: block;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
  }
}

.toc-title {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.toc-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-content a {
  display: block;
  position: relative;
  min-width: 0;
  padding: var(--space-1) var(--space-2) var(--space-1) var(--space-3);
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.45;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.toc-content a.toc-link--h3 {
  padding-left: var(--space-6);
  font-size: var(--text-xs);
}

.toc-content a.toc-link--h4 {
  padding-left: var(--space-8);
  font-size: var(--text-xs);
  opacity: 0.86;
}

.toc-content a:hover,
.toc-content a.active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  background-color: var(--color-accent-bg);
}

.toc-content a.active {
  font-weight: 600;
}

/* --- Comments Section --- */
.section-comments {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border);
}

/* --- Page Single Layout --- */
.page-single {
  padding: var(--space-12) 0 var(--space-16);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero {
    padding: var(--space-12) 0 var(--space-10);
  }

  .hero-avatar img {
    width: 72px;
    height: 72px;
  }

  .hero-title {
    font-size: var(--text-3xl);
  }

  .hero-subtitle {
    font-size: var(--text-base);
  }

  .post-title {
    font-size: var(--text-3xl);
  }

  .page-title {
    font-size: var(--text-2xl);
  }

  .archive-item {
    flex-direction: column;
    gap: var(--space-1);
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .highlight-grid {
    grid-template-columns: 1fr;
  }

  .archive-date {
    width: auto;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  .post-nav {
    grid-template-columns: 1fr;
  }

  .pagination {
    gap: var(--space-3);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }

  .hero-title {
    font-size: var(--text-2xl);
  }

  .post-title {
    font-size: var(--text-2xl);
  }
}