:root {
  --color-page: #f8faf8;
  --color-surface: #ffffff;
  --color-text: #1f2421;
  --color-muted: #59615b;
  --color-accent: #178f5b;
  --color-accent-alt: #c8413a;
  --color-line: #d6ded7;
  --color-panel: #eef4ef;
  --font-body: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  --font-display: Inter, Avenir, Helvetica, Arial, sans-serif;
  --space-page: 28px;
  --radius-control: 6px;
  --shadow-panel: 0 10px 28px rgba(31, 36, 33, 0.08);
}
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-page);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.site-shell {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
  padding: 30px 0 22px;
  border-bottom: 1px solid var(--color-line);
}

.site-mark {
  width: 64px;
  height: 64px;
}

.site-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.1;
  letter-spacing: 0;
}

.site-description,
.post-meta,
.site-footer,
.archive-count {
  color: var(--color-muted);
}

.site-description {
  margin: 8px 0 0;
  max-width: 760px;
}

.nav-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 0;
}

.nav-row a,
.theme-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 12px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
}

.content-grid {
  display: grid;
  gap: 20px;
  padding: var(--space-page) 0;
}

.post-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.post-card {
  min-height: 190px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  box-shadow: var(--shadow-panel);
}

.post-card h2,
.post-card h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
}

.post-card p {
  margin: 14px 0;
}

.post-page {
  max-width: 860px;
  margin: 0 auto;
  padding: var(--space-page) 0;
}

.post-hero {
  padding: 22px 0;
  border-bottom: 1px solid var(--color-line);
}

.post-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 38px;
  line-height: 1.12;
  letter-spacing: 0;
}

.post-body {
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  box-shadow: var(--shadow-panel);
  overflow-wrap: anywhere;
}

.post-body h1,
.post-body h2,
.post-body h3 {
  line-height: 1.25;
  letter-spacing: 0;
}

.post-body pre,
.post-body code {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.disclaimer {
  margin-top: 24px;
  padding: 14px 16px;
  border-left: 4px solid var(--color-accent-alt);
  background: var(--color-panel);
  border-radius: var(--radius-control);
  color: var(--color-muted);
}

.theme-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.site-footer {
  padding: 22px 0 32px;
  border-top: 1px solid var(--color-line);
}

@media (max-width: 640px) {
  .site-shell {
    width: min(100% - 24px, 1100px);
  }

  .site-header {
    grid-template-columns: 1fr;
  }

  .site-title {
    font-size: 28px;
  }

  .post-hero h1 {
    font-size: 30px;
  }

  .post-body {
    padding: 16px;
  }
}