:root {
  --bg: #000000;
  --text: #ffffff;
  --muted: #a3a3a3;
  --border: #262626;
  --hover: #0a0a0a;
  --max-width: 1400px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
}


.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--text);
  color: var(--bg);
  padding: 0.75rem 1rem;
  z-index: 10;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.page-shell {
  min-height: 100vh;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.site-header,
.content-section,
.state-card,
.post-card,
.site-footer,
.error-card {
  border: 1px solid var(--border);
  background: var(--bg);
}

.site-header {
  padding: 2rem;
}

.eyebrow {
  margin: 0 0 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  line-height: 1.15;
  margin-bottom: 0.85rem;
  font-weight: 500;
}

h2 {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0;
}

h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.intro,
.site-footer p,
.state-card,
.post-description,
.error-card p {
  color: var(--muted);
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  padding: 0.8rem 1rem;
  text-decoration: none;
  margin-top: 1.1rem;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.button-link:hover,
.button-link:focus-visible,
.post-link:hover,
.post-link:focus-visible,
.filter-button:hover,
.filter-button:focus-visible {
  background: var(--hover);
  border-color: var(--text);
  outline: none;
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 2rem 0 1.25rem;
}

.search-group input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.95rem 1rem;
  font: inherit;
}

.search-group input:focus-visible {
  outline: 1px solid var(--text);
  outline-offset: 2px;
}

.filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.filter-button {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  padding: 0.65rem 0.9rem;
  font: inherit;
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.filter-button[aria-pressed="true"] {
  border-color: var(--text);
  background: var(--hover);
}

.content-section {
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.section-heading {
  margin-bottom: 1rem;
}

.post-list {
  display: grid;
  gap: 1rem;
}

.post-card {
  padding: 1.2rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.post-badge {
  border: 1px solid var(--border);
  padding: 0.2rem 0.55rem;
}

.post-description {
  margin-bottom: 0.95rem;
}

.post-link {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  padding: 0.7rem 0.9rem;
  text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.post-link-disabled {
  color: var(--muted);
  display: inline-block;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
}

.state-card {
  padding: 1.2rem;
  margin-top: 0.5rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  margin-top: 1.5rem;
}

.error-page {
  display: grid;
  place-items: center;
  padding-top: 5rem;
}

.error-card {
  padding: 2rem;
  max-width: 34rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  .page-shell {
    padding: 1rem 0.9rem 2rem;
  }

  .site-header,
  .content-section {
    padding: 1rem;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}