:root {
  color-scheme: light dark;
  --bg: #f6f8fb;
  --bg-gradient-from: #f4f8ff;
  --bg-gradient-to: #eef5f8;
  --surface: #ffffff;
  --text: #1b2430;
  --muted: #58677a;
  --accent: #006e8f;
  --border: #d7e4ef;
  --border-header: #d6e0ea;
  --code-bg: #f0f3f7;
  --blockquote-bg: rgba(0, 110, 143, 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1318;
    --bg-gradient-from: #0f1318;
    --bg-gradient-to: #141a21;
    --surface: #1a2029;
    --text: #e2e6eb;
    --muted: #8a95a5;
    --accent: #3db8d9;
    --border: #2a3340;
    --border-header: #232b36;
    --code-bg: #1e2530;
    --blockquote-bg: rgba(61, 184, 217, 0.06);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Helvetica Neue", sans-serif;
  background: linear-gradient(180deg, var(--bg-gradient-from) 0%, var(--bg-gradient-to) 100%);
  color: var(--text);
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border-header);
}

.nav {
  max-width: 960px;
  margin: 0 auto;
  padding: 14px 16px;
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text);
  text-decoration: none;
}

.nav .brand {
  font-weight: 700;
  margin-right: auto;
}

.nav .cta,
.hero-cta {
  background: var(--accent);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 16px;
}

.hero {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 22px;
}

.card-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}

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

.meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  max-width: 960px;
  margin: 0 auto 24px;
  padding: 12px 16px;
  display: flex;
  gap: 16px;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

/* Article detail */
.article-detail {
  max-width: 720px;
}

/* Rendered markdown body */
.article-body h2,
.article-body h3,
.article-body h4 {
  margin-top: 1.6em;
  margin-bottom: 0.4em;
}

.article-body p {
  line-height: 1.7;
  margin: 0.8em 0;
}

.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1em 0;
  display: block;
}

.article-body figure {
  margin: 1.2em 0;
  padding: 0;
}

.article-body figcaption {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 4px;
}

.article-body blockquote {
  border-left: 3px solid var(--accent);
  margin: 1em 0;
  padding: 0.6em 1em;
  color: var(--muted);
  background: var(--blockquote-bg);
  border-radius: 0 8px 8px 0;
}

.article-body pre {
  background: var(--code-bg);
  padding: 12px 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.9rem;
}

.article-body code {
  background: var(--code-bg);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.9em;
}

.article-body pre code {
  background: none;
  padding: 0;
}

.article-body ul,
.article-body ol {
  padding-left: 1.4em;
  line-height: 1.7;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
}

.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}

.article-body th {
  background: var(--code-bg);
  font-weight: 600;
}

.article-body a {
  color: var(--accent);
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.6em 0;
}

/* Responsive iframe container (YouTube, etc.) */
.article-body iframe {
  max-width: 100%;
  border: none;
  border-radius: 8px;
  margin: 1em 0;
  display: block;
}

.article-body video {
  max-width: 100%;
  border-radius: 8px;
  margin: 1em 0;
  display: block;
}