.rfc-shell {
  max-width: 980px;
}

.rfc-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 0 18px;
  border-bottom: 1px solid var(--line);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
}

.rfc-nav a {
  color: var(--muted);
  text-decoration: none;
}

.rfc-nav a:hover,
.rfc-nav a:focus-visible {
  color: var(--cyan);
  outline: none;
}

.rfc-nav .rfc-brand {
  color: var(--text);
  font-weight: 800;
}

.rfc-nav-links,
.rfc-language-switcher {
  display: flex;
  align-items: center;
}

.rfc-nav-links {
  gap: 18px;
}

.rfc-language-switcher {
  gap: 7px;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.rfc-language-switcher strong {
  color: var(--amber);
}

.rfc-registry-header {
  max-width: 820px;
  padding: 66px 0 48px;
}

.rfc-registry-header h1 {
  margin: 0;
  font-size: clamp(3.2rem, 4.5rem, 4.5rem);
  line-height: 0.98;
}

.rfc-deck {
  margin: 10px 0 0;
  color: var(--amber);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 1rem;
}

.rfc-preamble {
  max-width: 760px;
  margin-top: 34px;
  padding-left: 18px;
  border-left: 2px solid var(--line-strong);
  color: var(--muted);
  font-size: 1rem;
}

.rfc-preamble p {
  margin: 0;
}

.rfc-preamble p + p {
  margin-top: 12px;
}

.rfc-registry {
  padding: 0 0 52px;
}

.rfc-registry > h2 {
  margin: 0 0 14px;
  color: var(--dim);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.rfc-registry-list {
  border-top: 1px solid var(--line-strong);
}

.rfc-registry-row {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr) 110px 150px;
  align-items: center;
  gap: 18px;
  min-height: 92px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}

.rfc-registry-row:hover,
.rfc-registry-row:focus-visible {
  padding-right: 12px;
  padding-left: 12px;
  color: var(--text);
  outline: none;
  background: rgba(117, 231, 240, 0.045);
}

.rfc-number,
.rfc-status,
.rfc-registry-row time {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
}

.rfc-number {
  color: var(--cyan);
}

.rfc-registry-title {
  display: grid;
  gap: 3px;
}

.rfc-registry-title strong {
  font-size: 1rem;
}

.rfc-registry-title span,
.rfc-registry-row time {
  color: var(--muted);
}

.rfc-status {
  color: var(--amber);
}

.rfc-back {
  display: inline-block;
  margin: 28px 0 0;
  color: var(--cyan);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  text-decoration: none;
}

.rfc-back:hover,
.rfc-back:focus-visible {
  text-decoration: underline;
  outline: none;
}

.rfc-document {
  max-width: 820px;
  margin: 0 auto;
}

.rfc-document-header {
  padding: 48px 0 42px;
  border-bottom: 1px solid var(--line-strong);
}

.rfc-document-id {
  margin: 0 0 14px;
  color: var(--cyan);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.82rem;
  font-weight: 800;
}

.rfc-document-header h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2.6rem, 3.7rem, 3.7rem);
  line-height: 1.02;
}

.rfc-acronym {
  margin: 10px 0 0;
  color: var(--amber);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 1.1rem;
}

.rfc-metadata {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 500px;
  margin: 38px 0 0;
  border-top: 1px solid var(--line);
}

.rfc-metadata > div {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
}

.rfc-metadata dt,
.rfc-metadata dd {
  margin: 0;
}

.rfc-metadata dt {
  color: var(--dim);
  text-transform: uppercase;
}

.rfc-metadata dd {
  color: var(--muted);
}

.rfc-sections {
  padding: 18px 0 42px;
}

.rfc-section {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.rfc-section h2 {
  margin: 0 0 18px;
  font-size: 1.45rem;
  line-height: 1.15;
}

.rfc-section h2 span {
  color: var(--dim);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.82em;
}

.rfc-section > p {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
}

.rfc-section > p + p {
  margin-top: 14px;
}

.rfc-protocol {
  max-width: 100%;
  margin: 22px 0 0;
  overflow-x: auto;
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  color: var(--green);
  background: #080d10;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.75;
  white-space: pre;
  scrollbar-color: var(--line-strong) transparent;
}

.rfc-protocol:focus-visible {
  border-color: var(--cyan);
  outline: none;
}

.rfc-references ol {
  display: grid;
  gap: 0;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: references;
}

.rfc-references li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  counter-increment: references;
}

.rfc-references li::before {
  grid-row: 1 / span 2;
  color: var(--dim);
  content: counter(references, decimal-leading-zero);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.76rem;
}

.rfc-references a {
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.rfc-related-bulletin a {
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.rfc-references li span {
  color: var(--dim);
  font-size: 0.82rem;
}

@media (max-width: 720px) {
  .rfc-nav {
    align-items: flex-start;
  }

  .rfc-nav-links {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px 12px;
  }

  .rfc-language-switcher {
    padding-left: 12px;
  }

  .rfc-registry-header {
    padding: 48px 0 38px;
  }

  .rfc-registry-header h1 {
    font-size: 3.15rem;
  }

  .rfc-registry-row {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 8px 12px;
    padding: 16px 0;
  }

  .rfc-status,
  .rfc-registry-row time {
    grid-column: 2;
  }

  .rfc-document-header {
    padding: 38px 0 32px;
  }

  .rfc-document-header h1 {
    font-size: 2.55rem;
  }

  .rfc-metadata {
    grid-template-columns: 1fr;
  }

  .rfc-metadata > div {
    grid-template-columns: 94px minmax(0, 1fr);
  }

  .rfc-protocol {
    padding: 14px;
    font-size: 0.72rem;
  }
}

@media (max-width: 390px) {
  .rfc-nav-links > a:not(.rfc-language-switcher a) {
    font-size: 0.72rem;
  }

  .rfc-registry-header h1 {
    font-size: 2.8rem;
  }

  .rfc-document-header h1 {
    font-size: 2.25rem;
  }
}