:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --bg-color: #fdfdfd;
  --text-color: #1a1a1a;
  --text-muted: #666666;
  --border-color: #e5e5e5;
  --card-bg: #ffffff;
  --link-color: #0366d6;
  --link-hover: #024ea2;
  --tag-bg: #eef2f8;
  --tag-text: #2c5282;
  --code-bg: #f4f4f5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #0f141c;
    --text-color: #f0f6fc;
    --text-muted: #a5b4c4;
    --border-color: #30363d;
    --card-bg: #161b22;
    --link-color: #58a6ff;
    --link-hover: #79c0ff;
    --tag-bg: #1f2e42;
    --tag-text: #93c5fd;
    --code-bg: #1c2128;
  }
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.5;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

header.site-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-color);
  text-decoration: none;
}

nav.site-nav {
  display: flex;
  gap: 1.2rem;
  font-size: 0.95rem;
}

nav.site-nav a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  opacity: 0.85;
  transition: opacity 0.15s ease, color 0.15s ease;
}

nav.site-nav a:hover,
nav.site-nav a.active {
  color: var(--link-color);
  opacity: 1;
}

.intro-banner {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.intro-banner h1 {
  margin: 0 0 0.5rem 0;
  font-size: 1.75rem;
}

.intro-banner p {
  color: var(--text-muted);
  margin: 0;
}

.bookmark-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.bookmark-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  transition: border-color 0.15s ease;
}

.bookmark-card:hover {
  border-color: var(--link-color);
}

.bookmark-content-row {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.bookmark-thumbnail {
  flex-shrink: 0;
  width: 140px;
  height: 95px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--code-bg);
}

.bookmark-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.bookmark-details {
  flex: 1;
  min-width: 0;
}

.bookmark-favicon {
  vertical-align: -2px;
  margin-right: 4px;
  border-radius: 2px;
}
.bookmark-title-row {
  margin: 0 0 0.4rem 0;
  font-size: 1.15rem;
  font-weight: 600;
}

.bookmark-link {
  color: var(--link-color);
  text-decoration: none;
  word-break: break-word;
}

.bookmark-link:hover {
  text-decoration: underline;
}

.bookmark-url {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  word-break: break-all;
  margin-bottom: 0.6rem;
}

.bookmark-desc {
  font-size: 0.95rem;
  color: var(--text-color);
  margin: 0.5rem 0;
  white-space: pre-line;
}

.bookmark-notes {
  background: var(--code-bg);
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  font-size: 0.88rem;
  margin: 0.6rem 0;
  border-left: 3px solid var(--link-color);
}

.bookmark-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-top: 0.8rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.bookmark-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag-badge {
  background-color: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.15rem 0.55rem;
  border-radius: 9999px;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
}

.tag-badge:hover {
  filter: brightness(0.92);
}

.bookmark-actions {
  margin-left: auto;
  display: flex;
  gap: 0.75rem;
}

.bookmark-actions a {
  color: var(--text-muted);
  text-decoration: none;
}

.bookmark-actions a:hover {
  color: var(--link-color);
  text-decoration: underline;
}

/* Archives & Tag Cloud */
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.year-card {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  background: var(--card-bg);
}

.year-card h2 {
  margin: 0 0 0.8rem 0;
  font-size: 1.25rem;
}

.month-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.month-list a {
  color: var(--link-color);
  text-decoration: none;
  font-size: 0.9rem;
}

.month-list a:hover {
  text-decoration: underline;
}

.month-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.tag-pill {
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  text-decoration: none;
  color: var(--text-color);
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.tag-pill:hover {
  border-color: var(--link-color);
  color: var(--link-color);
}

.tag-pill .count {
  font-size: 0.75rem;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.1rem 0.4rem;
  border-radius: 9999px;
}

footer.site-footer {
  border-top: 1px solid var(--border-color);
  margin-top: 3rem;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

#search-box {
  margin-top: 1.5rem;
}