:root {
  --bg: #0f1117;
  --bg-elevated: #161b22;
  --border: #2d333b;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --focus-ring: #388bfd;
  --heading: #5c85d6;
  --logo-filter: none;
  --radius: 10px;
  --max-width: 680px;
  --font: 'Inconsolata', ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, monospace;
  --font-display: 'Inconsolata', ui-monospace, monospace;
}

[data-theme='light'] {
  --bg: #f6f8fa;
  --bg-elevated: #ffffff;
  --border: #d0d7de;
  --text: #1f2328;
  --text-muted: #656d76;
  --accent: #0969da;
  --accent-hover: #0550ae;
  --focus-ring: #0969da;
  --heading: #002868;
  --logo-filter: invert(1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.logo {
  display: block;
  height: auto;
  filter: var(--logo-filter);
  transition: filter 0.2s ease;
}

.logo-hero {
  width: min(210px, 54vw);
  margin-bottom: 1.5rem;
  image-rendering: auto;
}

.logo-footer {
  width: 96px;
  flex-shrink: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 500;
}

.skip-link:focus {
  top: 1rem;
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: 2px;
}

.hero {
  padding: 4rem 0 3rem;
}

.hero-name {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.5vw, 2.5rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.15;
  color: var(--heading);
}

.hero-tagline {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 400;
  color: var(--text-muted);
  max-width: 46ch;
  white-space: pre-line;
}

.theme-toggle-hero {
  margin-top: 1.25rem;
}

.section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

.section-title {
  margin: 0 0 1.5rem;
  font-size: 1.125rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--heading);
}

.card-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  padding: 1.25rem 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.card-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.375rem;
}

.card-title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
}

.card-desc {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.card-link {
  display: inline-block;
  margin-top: 0.875rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}

.card-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tag {
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.site-footer {
  margin-top: 2rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-brand {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 1.75rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.15s ease;
}

.footer-nav a:hover {
  color: var(--text);
}

.footer-copy {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.theme-toggle {
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

[data-theme='light'] .theme-toggle:hover {
  background: var(--bg-elevated);
}

.back-link {
  display: inline-block;
  margin-bottom: 2rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}

.back-link:hover {
  color: var(--accent);
}

.post {
  padding: 3rem 0 4rem;
}

.post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.post-label {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--heading);
}

.post-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 1.2;
  color: var(--text);
}

.post-meta {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.post-body {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
}

.post-body p {
  margin: 0 0 1.25rem;
}

.post-empty {
  color: var(--text-muted);
  font-style: italic;
}

.post .theme-toggle {
  margin-top: 2.5rem;
}

.error-notice {
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  background: #3d1f1f;
  border: 1px solid #8b3a3a;
  border-radius: var(--radius);
  color: #f0a0a0;
}

@media (max-width: 480px) {
  .hero {
    padding: 2.5rem 0 2rem;
  }

  .logo-hero {
    width: min(180px, 60vw);
    margin-bottom: 1.25rem;
  }

  .card {
    padding: 1rem 1.125rem;
  }

  .footer-brand {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}