/* ============================================================================
   § 18. PAGE LAYOUT (About, Archives, Tags, Links, Memos, Tag, 404)
   ============================================================================ */

.page-container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.page-header {
  padding-top: 64px;
  margin-bottom: 40px;
}

.page-subtitle {
  margin-top: 12px;
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.page-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--color-text-primary);
}

.page-description {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-top: 8px;
  line-height: 1.5;
}


/* ============================================================================
   § 19. ARCHIVE LIST
   ============================================================================ */


.archive-list {
  margin-top: 8px;
}

.archive-year {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-top: 48px;
  margin-bottom: 4px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.archive-year:first-child {
  margin-top: 0;
}

.archive-item {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 12px 0;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--color-border-light);
  transition: color var(--transition-fast);
}

.archive-item:last-child {
  border-bottom: none;
}

.archive-item__date {
  flex-shrink: 0;
  width: 110px;
  font-size: 13px;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  line-height: 1.5;
  transition: color var(--transition-fast);
}

.archive-item__title {
  flex: 1;
  min-width: 0;
  font-size: 15px;
  color: var(--color-text-body);
  line-height: 1.6;
  transition: color var(--transition-fast);
}

.archive-item:hover .archive-item__title {
  color: var(--color-text-primary);
}

.archive-item:hover .archive-item__date {
  color: var(--color-text-secondary);
}

.archive-item .archive-item__badge {
  flex-shrink: 0;
}


/* ============================================================================
   § 20. TAGS CLOUD
   ============================================================================ */

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-card {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-decoration: none;
  transition: border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.tag-card:hover {
  border-color: var(--color-border-hover);
  background-color: var(--color-border-light);
}

.tag-card__name {
  font-size: 15px;
  color: var(--color-text-primary);
  margin-right: 8px;
}

.tag-card__count {
  font-size: 13px;
  color: var(--color-text-muted);
}


/* ============================================================================
   § 21. MEMOS TIMELINE
   ============================================================================ */

/* ── Memos heatmap (闪念热力图) ── */
.heatmap-wrap {
  margin-top: 24px;
  margin-bottom: 48px;
  overflow-x: auto;
  padding-bottom: 8px;
}

.heatmap-wrap table {
  border-collapse: separate;
  border-spacing: 3px;
  table-layout: fixed;
  width: 100%;
  min-width: 640px;
}

.heatmap-wrap td.cell {
  height: 14px;
  border-radius: 2px;
  cursor: default;
  transition: outline 0.15s ease;
}

.heatmap-wrap td.cell:hover {
  outline: 1px solid var(--heatmap-color);
  outline-offset: 1px;
}

.heatmap-wrap td:empty {
  height: 14px;
}

.heatmap-month-label {
  font-size: 11px;
  color: var(--color-text-muted);
  text-align: left;
  padding: 0 0 4px 0;
  line-height: 1;
  font-family: var(--font-body);
}

.heatmap-day-label {
  font-size: 10px;
  color: var(--color-text-muted);
  width: 28px;
  min-width: 28px;
  max-width: 28px;
  text-align: right;
  padding-right: 6px;
  line-height: 1;
  font-family: var(--font-body);
}

.heatmap-footer {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 10px;
  padding-left: 34px;
  font-size: 11px;
  color: var(--color-text-muted);
}

.heatmap-legend {
  display: flex;
  align-items: center;
  gap: 4px;
}

.heatmap-legend-cell {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
}

/* 热力图主色：默认 GitHub 绿，可由 theme_config.heatmapColor 在 <head> 覆盖 */
:root {
  --heatmap-color: #39d353;
}

/* 各等级：最深用主色本色，往下依次按比例向当前背景色混合，自动跟随深浅模式 */
.heatmap-wrap td.cell[data-level="0"],
.heatmap-legend-cell[data-level="0"] {
  background: color-mix(in srgb, var(--color-text-primary) 10%, var(--color-bg));
}
.heatmap-wrap td.cell[data-level="1"],
.heatmap-legend-cell[data-level="1"] {
  background: color-mix(in srgb, var(--heatmap-color) 22%, var(--color-bg));
}
.heatmap-wrap td.cell[data-level="2"],
.heatmap-legend-cell[data-level="2"] {
  background: color-mix(in srgb, var(--heatmap-color) 48%, var(--color-bg));
}
.heatmap-wrap td.cell[data-level="3"],
.heatmap-legend-cell[data-level="3"] {
  background: color-mix(in srgb, var(--heatmap-color) 72%, var(--color-bg));
}
.heatmap-wrap td.cell[data-level="4"],
.heatmap-legend-cell[data-level="4"] {
  background: var(--heatmap-color);
}


.memo-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.memo-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.memo-item:first-child {
  padding-top: 0;
}

.memo-item:last-child {
  border-bottom: none;
}

.memo-item__content {
  font-size: 15px;
  color: var(--color-text-body);
  line-height: 1.6;
}

.memo-item__content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.memo-item__date {
  font-family: var(--font-body);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-top: 8px;
}


/* ============================================================================
   § 22. FRIENDS GRID
   ============================================================================ */

.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.link-card {
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.link-card:hover {
  border-color: var(--color-border-hover);
  background-color: #161616;
}

.link-card__top {
  display: flex;
  align-items: center;
  gap: 14px;
}

.link-card__avatar-wrap {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 50%;
  overflow: hidden;
}

.link-card__avatar-wrap img {
  width: 100% !important;
  height: 100% !important;
  max-width: none !important;
  object-fit: cover;
  display: block;
  border-radius: 0;
}

.link-card__avatar-text {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.link-card__info {
  flex: 1;
  min-width: 0;
}

.link-card__name {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.link-card__arrow {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-border);
  color: var(--color-text-secondary);
  transition: background-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.link-card:hover .link-card__arrow {
  background-color: var(--color-text-primary);
  color: #000;
  transform: translateX(2px);
}

.link-card__desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
  padding-left: 58px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}



/* ============================================================================
   § 24. 404 ERROR PAGE
   ============================================================================ */

.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 68vh;
  text-align: center;
  padding: 60px 24px;
}

.error-page__code {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 9vw, 7rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.04em;
  background: linear-gradient(180deg,
      var(--color-text-primary) 0%,
      var(--color-text-muted) 60%,
      transparent 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  user-select: none;
}

.error-page__code::after {
  content: "";
  display: block;
  width: 36px;
  height: 2px;
  background: var(--color-badge-gold);
  margin: 28px auto 0;
}

.error-page__title {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-top: 28px;
}

.error-page__desc {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-top: 18px;
  max-width: 420px;
}

.error-page__actions {
  margin-top: 52px;
}

.error-page__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}