:root {
  color-scheme: normal;
  --bg: #f8fafc;
  --surface: rgba(255, 255, 255, 0.85);
  --surface-strong: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #2563eb;
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.08);
}

html[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0b1220;
  --surface: rgba(18, 25, 41, 0.88);
  --surface-strong: #111827;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #60a5fa;
  --border: rgba(148, 163, 184, 0.2);
  --shadow: 0 24px 80px rgba(7, 10, 22, 0.45);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: "Charter", "Bitstream Charter", Georgia, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 35%),
    radial-gradient(circle at bottom right, rgba(96, 165, 250, 0.08), transparent 28%),
    var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.7;
  letter-spacing: 0.2px;
}

.page-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
}

.site-header {
  flex-wrap: wrap;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.site-header h1 {
  margin: 0;
  font-size: clamp(2rem, 3.4vw, 3.3rem);
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.lede {
  margin: 16px 0 0;
  max-width: 54rem;
  color: var(--muted);
}

.header-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 12px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--accent);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.social-link:hover {
  opacity: 0.7;
  transform: translateY(-2px);
}

.social-link svg {
  width: 100%;
  height: 100%;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  padding: 0;
}

.theme-icon {
  display: block;
  width: 18px;
  height: 18px;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  transform: translateY(-1px);
  outline: none;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 760px);
  gap: 32px;
  justify-content: center;
  align-items: start;
}

.posts-panel {
  position: sticky;
  top: 24px;
  align-self: start;
  padding: 20px 18px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel-head h2,
.post-meta h2 {
  margin-top: 0;
  font-size: 1.8rem;
  font-weight: 600;
  line-height: 1.2;
}

.panel-copy {
  margin-top: 0.5rem;
  color: var(--muted);
}

.post-list {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.post-card {
  display: block;
  padding: 18px 18px 20px;
  border-radius: 18px;
  background: var(--surface-strong);
  border: 1px solid transparent;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  color: inherit;
}

.post-card:hover,
.post-card:focus-visible {
  border-color: var(--accent);
  outline: none;
  transform: translateY(-1px);
}

.post-card.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
  background: rgba(37, 99, 235, 0.03);
}

.post-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.post-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.post-card time {
  display: block;
  margin-top: 0.85rem;
  color: var(--accent);
  font-size: 0.85rem;
}

.post-view {
  padding: 28px 32px;
  border-radius: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  min-height: 420px;
  max-width: 760px;
  margin: 0 auto;
}

.fallback-card {
  display: grid;
  gap: 18px;
  align-content: center;
  min-height: 320px;
  padding: 16px 6px;
}

.fallback-kicker {
  display: inline-block;
  width: fit-content;
  padding: 0.38rem 0.7rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.fallback-card h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.1;
}

.fallback-card p {
  margin: 0;
  color: var(--muted);
  max-width: 36rem;
}

.fallback-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.fallback-tags span {
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.06);
  color: var(--text);
  font-size: 0.85rem;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.contact-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.contact-links a:hover,
.contact-links a:focus-visible {
  border-color: var(--accent);
  transform: translateY(-1px);
  outline: none;
}

.fallback-hint {
  font-weight: 600;
  color: var(--text) !important;
}

.post-meta {
  margin-bottom: 28px;
}

.post-meta p {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.92rem;
}

.hidden {
  display: none;
}

.markdown-body {
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.8;
  letter-spacing: 0.15px;
}

.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.markdown-body p {
  margin: 1rem 0;
}

.markdown-body a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 99, 235, 0.25);
}

.markdown-body a:hover {
  text-decoration: underline;
}

.markdown-body blockquote {
  margin: 1.5rem 0;
  padding: 18px 22px;
  border-left: 4px solid var(--accent);
  background: rgba(37, 99, 235, 0.06);
  color: var(--muted);
}

.markdown-body pre,
.markdown-body code {
  font-family: "Fira Code", SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.markdown-body pre {
  margin: 1.2rem 0;
  padding: 20px;
  border-radius: 20px;
  background: rgba(15, 23, 42, 0.05);
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.15);
  overflow-x: auto;
}

.markdown-body code {
  padding: 0.22rem 0.4rem;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.06);
}

.token-comment { color: #7c92ac; }
.token-string { color: #4f9d67; }
.token-number { color: #b66dff; }
.token-function { color: #2563eb; }
.token-keyword { color: #0f172a; font-weight: 600; }
.token-literal { color: #2563eb; }
.token-variable { color: #f97316; }

html[data-theme='dark'] .token-comment { color: #8ea3bf; }
html[data-theme='dark'] .token-string { color: #7dd3fc; }
html[data-theme='dark'] .token-number { color: #caa0ff; }
html[data-theme='dark'] .token-function { color: #38bdf8; }
html[data-theme='dark'] .token-keyword { color: #bfdbfe; }
html[data-theme='dark'] .token-literal { color: #93c5fd; }
html[data-theme='dark'] .token-variable { color: #fb923c; }

.markdown-body ul,
.markdown-body ol {
  margin: 1rem 0 1rem 0.5rem;
  padding-left: 1.2rem;
}

.site-footer {
  margin-top: 42px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .content-layout {
    grid-template-columns: 1fr;
  }

  .posts-panel {
    position: static;
  }
}

@media (max-width: 640px) {
  .page-shell {
    padding: 24px 18px 36px;
  }

  .site-header {
    gap: 18px;
  }

  .site-footer {
    text-align: left;
  }
}