:root {
  --vault-ink: #111111;
  --vault-muted: #555555;
  --vault-line: #d8d8d8;
  --vault-soft: #f4f4f4;
  --vault-warm: #ffffff;
  --vault-accent: #111111;
  --vault-link: #111111;
  --vault-header: #111111;
  color: var(--vault-ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

* {
  box-sizing: border-box;
}

body {
  background: #ffffff;
  margin: 0;
}

a {
  color: var(--vault-link);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #000000;
}

.site-header {
  align-items: center;
  background: var(--vault-header);
  box-shadow: 0 2px 10px rgba(22, 32, 31, 0.18);
  display: flex;
  gap: 2rem;
  justify-content: space-between;
  min-height: 4.35rem;
  padding: 0.55rem clamp(1rem, 4vw, 5rem);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  align-items: center;
  color: #ffffff;
  display: inline-flex;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  font-weight: 790;
  gap: 0.8rem;
  letter-spacing: 0;
  line-height: 1.1;
  text-decoration: none;
}

.brand:hover {
  color: #ffffff;
}

.brand img {
  flex: 0 0 auto;
  height: clamp(2.55rem, 5vw, 3.25rem);
  object-fit: contain;
  width: clamp(2.55rem, 5vw, 3.25rem);
}

.visually-hidden {
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

.site-nav {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  justify-content: flex-end;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.82rem;
  font-weight: 680;
  text-decoration: none;
}

.site-nav a:hover {
  color: #ffffff;
}

.page-shell {
  margin: 0 auto;
  max-width: 64rem;
  padding: clamp(2.4rem, 7vw, 4.5rem) clamp(1rem, 4vw, 2rem);
}

.content {
  max-width: 46rem;
}

.content h1,
.content h2,
.content h3 {
  color: var(--vault-ink);
  letter-spacing: 0;
  line-height: 1.16;
}

.content h1 {
  font-size: clamp(2.15rem, 5vw, 3.6rem);
  font-weight: 790;
  margin: 0 0 1.8rem;
}

.content h2 {
  font-size: clamp(1.45rem, 3vw, 2rem);
  font-weight: 740;
  margin: 2.4rem 0 0.8rem;
}

.content h3 {
  font-size: 1.15rem;
  font-weight: 720;
  margin: 1.8rem 0 0.6rem;
}

.content p,
.content li {
  color: #2f2f2f;
}

.content p {
  margin: 0 0 1rem;
}

.content ul,
.content ol {
  padding-left: 1.25rem;
}

.content code {
  background: #f0f0f0;
  border-radius: 4px;
  color: #222222;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86em;
  padding: 0.1rem 0.24rem;
}

.content pre {
  background: #f5f5f5;
  border: 1px solid var(--vault-line);
  border-radius: 8px;
  overflow-x: auto;
  padding: 1rem;
}

.content pre code {
  background: transparent;
  border-radius: 0;
  display: block;
  padding: 0;
}

.content img {
  border-radius: 8px;
  display: block;
  height: auto;
  margin: 1.4rem 0;
  max-width: 100%;
}

.content p > img:only-child {
  margin-left: auto;
  margin-right: auto;
}

.home-masthead {
  margin: 0 0 2rem;
}

.home-masthead img {
  border-radius: 0;
  margin: 0;
  max-width: min(100%, 25rem);
}

.source-link {
  border-top: 1px solid var(--vault-line);
  color: var(--vault-muted);
  font-size: 0.9rem;
  margin-top: 2.4rem;
  padding-top: 1rem;
}

.vault-hero {
  align-items: center;
  background: var(--vault-soft);
  border: 1px solid var(--vault-line);
  border-radius: 8px;
  display: grid;
  gap: 1.4rem;
  grid-template-columns: minmax(0, 1.25fr) minmax(12rem, 0.75fr);
  margin: 1.4rem 0 2rem;
  padding: clamp(1.1rem, 2.5vw, 2rem);
}

.vault-hero__copy h2 {
  margin-top: 0;
}

.vault-hero__copy p {
  color: var(--vault-muted);
  font-size: 0.98rem;
  line-height: 1.65;
  max-width: 34rem;
}

.vault-signal {
  align-content: center;
  align-self: center;
  background: transparent;
  border: 0;
  display: grid;
  gap: 0.65rem;
  padding: 0.2rem;
}

.vault-signal span {
  background: #ffffff;
  border: 1px solid var(--vault-line);
  border-left: 0.25rem solid var(--vault-accent);
  border-radius: 6px;
  color: #2f2f2f;
  display: block;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0;
  padding: 0.55rem 0.65rem;
  text-transform: uppercase;
}

.md-button {
  border: 2px solid var(--vault-header);
  border-radius: 6px;
  color: var(--vault-header);
  display: inline-block;
  font-weight: 740;
  padding: 0.55rem 0.85rem;
  text-decoration: none;
}

.vault-hero .md-button {
  margin-bottom: 0.4rem;
  margin-right: 0.35rem;
  min-width: 8.6rem;
  text-align: center;
  white-space: nowrap;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.2rem;
}

.archive-browser {
  align-items: start;
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(8rem, 0.55fr) minmax(0, 1.45fr);
  margin: 1rem 0 2rem;
}

.archive-years {
  display: grid;
  gap: 0.55rem;
}

.archive-year {
  background: #ffffff;
  border: 1px solid var(--vault-line);
  border-radius: 8px;
  color: var(--vault-ink);
  cursor: pointer;
  display: flex;
  font: inherit;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 0.8rem;
  text-align: left;
  text-decoration: none;
  width: 100%;
}

.archive-year:hover,
.archive-year:focus {
  color: var(--vault-ink);
}

.archive-year:focus-visible {
  outline: 3px solid rgba(0, 0, 0, 0.22);
  outline-offset: 2px;
}

.archive-year.is-current {
  background: var(--vault-header);
  border-color: var(--vault-header);
  color: #ffffff;
}

.archive-year span {
  font-weight: 780;
}

.archive-year small {
  color: inherit;
  font-size: 0.75rem;
  opacity: 0.72;
  white-space: nowrap;
}

.archive-months {
  display: grid;
  gap: 1rem;
}

.archive-month-group {
  background: #ffffff;
  border: 1px solid var(--vault-line);
  border-radius: 8px;
  padding: 1rem;
}

.archive-month-group[hidden] {
  display: none;
}

.archive-month-group.is-current {
  background: var(--vault-soft);
}

.archive-month-group h3 {
  margin-top: 0;
}

.archive-month-group ol {
  display: grid;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.archive-month-group li {
  align-items: baseline;
  border-top: 1px solid var(--vault-line);
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
  padding-top: 0.5rem;
}

.archive-month-group li:first-child {
  border-top: 0;
  padding-top: 0;
}

.archive-month-group li span {
  color: var(--vault-muted);
  font-size: 0.82rem;
  white-space: nowrap;
}

.md-button--primary {
  background: var(--vault-header);
  color: #ffffff;
}

.md-button--primary:hover {
  color: #ffffff;
}

.site-footer {
  align-items: center;
  background: #111111;
  color: rgba(255, 255, 255, 0.72);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  padding: 1.2rem clamp(1rem, 4vw, 5rem);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.86rem;
  text-decoration: none;
}

@media screen and (max-width: 44.984375em) {
  :root {
    font-size: 16px;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.6rem;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .vault-hero {
    grid-template-columns: 1fr;
  }

  .archive-browser {
    grid-template-columns: 1fr;
  }

  .archive-years {
    grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  }

  .archive-month-group li {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.1rem;
  }
}