@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("data:font/woff2;base64,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") format("woff2");
}

/* ---------- tokens ---------- */
:root {
  --bg: #0f1520;
  --bg-raised: #131b27;
  --panel: #16202e;
  --panel-2: #1a2535;
  --panel-3: #202c3f;
  --fg: #e6edf3;
  --muted: #97a4b5;
  --dim: #8794a6;
  --accent: #7ee787;
  --accent-2: #6cb6ff;
  --warn: #e3b341;
  --bad: #ff7b72;
  --good: #7ee787;
  --line: rgba(230, 237, 243, 0.11);
  --line-strong: rgba(230, 237, 243, 0.2);
  --accent-soft: color-mix(in srgb, var(--accent) 12%, transparent);
  --accent-line: color-mix(in srgb, var(--accent) 42%, transparent);
  --row-hl: color-mix(in srgb, var(--accent) 7%, transparent);
  --shadow: 0 20px 55px rgba(0, 0, 0, 0.38);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --radius: 3px;
  --header-h: 64px;
  --max: 1240px;
  --tone-a: #7aa2f7;
  --tone-b: #bb9af7;
  --tone-c: #7dcfff;
  --tone-d: #9ece6a;
  --tone-e: #e0af68;
  --tone-f: #f7768e;
  --tone-g: #73daca;
  --tone-h: #c0caf5;
  --tone-i: #ff9e64;
  --tone-j: #2ac3de;
  color-scheme: dark;
}

html[data-theme="amber"] { --accent: #ffb86b; }
html[data-theme="ice"]   { --accent: #6cb6ff; }
html[data-theme="pink"]  { --accent: #f778ba; }
html[data-theme="bone"]  { --accent: #e6edf3; }

html {
  box-sizing: border-box;
  scroll-behavior: smooth;
}
*, *::before, *::after { box-sizing: inherit; }

body {
  margin: 0;
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.62;
  letter-spacing: -0.012em;
  color: var(--fg);
  background: var(--bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "liga" 1, "calt" 1, "zero" 1, "tnum" 1;
}

::selection { background: var(--accent); color: #06100a; }

a { color: inherit; text-decoration-color: var(--accent-line); text-underline-offset: 3px; }
a:hover { color: var(--accent); text-decoration-color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible,
textarea:focus-visible, summary:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

h1, h2, h3, h4 { line-height: 1.22; font-weight: 700; letter-spacing: -0.035em; }
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); margin: 0 0 8px; }
h2 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); margin: 0 0 14px; }
h3 { font-size: 1.05rem; margin: 0 0 10px; }
p { margin: 0 0 14px; }
strong { font-weight: 700; color: var(--fg); }
small { font-size: 0.8rem; }

code, kbd, samp {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 2px;
  padding: 1px 5px;
}
kbd {
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  background: var(--panel-2);
  color: var(--fg);
  font-size: 0.72rem;
  padding: 0 5px;
  white-space: nowrap;
}
pre {
  margin: 0;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.7;
  tab-size: 2;
}
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

hr { border: 0; border-top: 1px dashed var(--line-strong); margin: 32px 0; }

::placeholder { color: var(--dim); opacity: 1; }

.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;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  background: var(--accent);
  color: #041008;
  padding: 8px 12px;
  font-weight: 700;
  text-decoration: none;
}
.skip-link:focus { top: 12px; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  min-height: var(--header-h);
  border-bottom: 1px dashed var(--line-strong);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
}
.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  height: var(--header-h);
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 22px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--fg);
}
.brand:hover { color: var(--fg); }
.brand__box {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #041008;
  font-weight: 800;
  font-size: 0.82rem;
  letter-spacing: -0.04em;
  padding: 5px 9px 4px;
  line-height: 1.2;
  border-radius: 2px;
}
.brand__box .prompt { opacity: 0.55; font-weight: 700; }
.brand__cursor {
  display: inline-block;
  width: 7px;
  height: 13px;
  background: #041008;
  animation: blink 1.25s steps(1) infinite;
}
.brand__rule {
  flex: 1 1 auto;
  height: 1px;
  min-width: 16px;
  background: repeating-linear-gradient(90deg, var(--accent-line) 0 2px, transparent 2px 7px);
}
@keyframes blink { 0%, 48% { opacity: 1; } 49%, 100% { opacity: 0; } }

.header-tools { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 30px;
  padding: 0 9px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }
.icon-btn svg { width: 13px; height: 13px; }
.icon-btn--search {
  min-width: 250px;
  justify-content: flex-start;
}
.icon-btn--search .kbd-hint { margin-left: auto; }
.header-tools .icon-btn--square {
  width: 30px;
  padding: 0;
  justify-content: center;
}
.header-tools .icon-btn--square svg { width: 15px; height: 15px; }
.mobile-nav-btn { display: none; }
.mobile-nav {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: var(--header-h);
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
  background: var(--panel);
  border-bottom: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
  padding: 12px 28px 18px;
  z-index: 59;
}
.mobile-nav:not([hidden]) { display: block; }
.mobile-nav__group { margin-bottom: 14px; }
.mobile-nav__group:last-child { margin-bottom: 0; }
.mobile-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px 16px;
}
.mobile-nav a {
  display: block;
  padding: 6px 0;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8rem;
}
.mobile-nav a:hover,
.mobile-nav a.is-active { color: var(--accent); }
.mobile-nav a.is-active::before { content: "> "; white-space: pre; }
.icon-btn .kbd-hint {
  border: 1px solid var(--line-strong);
  color: var(--dim);
  padding: 0 3px;
  font-size: 0.65rem;
  border-radius: 2px;
}

/* ---------- layout ---------- */
.shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}
.page-shell {
  display: grid;
  grid-template-columns: 196px minmax(0, 1fr);
  gap: 44px;
  align-items: start;
  padding-top: 38px;
  padding-bottom: 80px;
}
main { min-width: 0; }
.not-found { max-width: 760px; padding-top: 80px; padding-bottom: 120px; }
.not-found .lead { color: var(--muted); font-size: 0.92rem; max-width: 58ch; }
main:focus { outline: none; }
main:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.rail {
  position: sticky;
  top: calc(var(--header-h) + 28px);
  font-size: 0.76rem;
  border-left: 1px dashed var(--line);
  padding-left: 16px;
}
.rail__group { margin-bottom: 26px; }
.rail__label {
  color: var(--dim);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 8px;
}
.rail ul { list-style: none; margin: 0; padding: 0; }
.rail li { margin: 2px 0; }
.rail a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  padding: 2px 0;
  line-height: 1.4;
}
.rail a::before { content: "  "; white-space: pre; }
.rail a:hover { color: var(--fg); }
.rail a.is-active { color: var(--accent); }
.rail a.is-active::before { content: "> "; white-space: pre; }
.rail a::after { content: attr(data-layer); float: right; color: var(--dim); font-size: 0.54rem; font-weight: 400; line-height: 1.6; }
.rail__note {
  color: var(--dim);
  font-size: 0.66rem;
  line-height: 1.55;
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}
.rail__note b { color: var(--muted); font-weight: 500; }

/* ---------- page heading ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  color: var(--dim);
  font-size: 0.72rem;
  margin-bottom: 18px;
}
.crumbs a { text-decoration: none; color: var(--muted); }
.crumbs a:hover { color: var(--accent); }
.crumbs span.sep { color: var(--dim); opacity: 0.6; }

.page-head { margin-bottom: 30px; }
.page-head h1 { color: var(--fg); }
.page-head h1 .accent { color: var(--accent); }
.page-head .lead {
  color: var(--muted);
  max-width: 72ch;
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 12px 0 16px;
}
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0 0; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.66rem;
  line-height: 1.5;
  color: var(--muted);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  padding: 2px 7px;
  text-decoration: none;
  white-space: nowrap;
}
.badge b { color: var(--fg); font-weight: 500; }
.badge--accent { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }
.badge a { color: inherit; }
a.badge:hover { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  color: var(--dim);
  font-size: 0.72rem;
  margin-top: 12px;
}
.page-meta span { white-space: nowrap; }
.page-meta b { color: var(--muted); font-weight: 500; }

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.toc a {
  display: inline-block;
  color: var(--muted);
  border: 1px dashed var(--line-strong);
  padding: 3px 8px;
  font-size: 0.7rem;
  text-decoration: none;
  border-radius: 2px;
}
.toc a:hover { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }

.mobile-toc { display: none; }
.mobile-toc summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  cursor: pointer;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  list-style: none;
}
.mobile-toc summary::-webkit-details-marker { display: none; }
.mobile-toc summary::after {
  content: "+";
  color: var(--accent);
  font-size: 0.9rem;
  line-height: 1;
}
.mobile-toc[open] summary { border-bottom: 1px dashed var(--line); }
.mobile-toc[open] summary::after { content: "−"; }
.mobile-toc ul {
  list-style: none;
  margin: 0;
  padding: 8px 12px 10px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px 14px;
}
.mobile-toc a {
  display: block;
  padding: 5px 0;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.78rem;
}
.mobile-toc a:hover,
.mobile-toc a.is-active { color: var(--accent); }
.mobile-toc a.is-active::before { content: "> "; white-space: pre; }

/* ---------- sections ---------- */
.section {
  margin: 0 0 52px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  margin-bottom: 18px;
}
.section__head h2 { margin: 0; }
.section__head h2 .num {
  color: var(--dim);
  font-size: 0.7rem;
  font-weight: 400;
  margin-right: 8px;
  letter-spacing: 0;
}
.section__hint { color: var(--dim); font-size: 0.7rem; text-align: right; }
.section > p { color: var(--muted); max-width: 82ch; }
.section > p strong { color: var(--fg); }
h2 .on { color: var(--muted); font-weight: 400; }

/* ---------- buttons & forms ---------- */
.btn {
  --btn-fg: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid var(--accent-line);
  border-radius: 2px;
  background: transparent;
  color: var(--btn-fg);
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.3;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.btn--primary { background: var(--accent); color: #041008; border-color: var(--accent); font-weight: 700; }
.btn--primary:hover { background: color-mix(in srgb, var(--accent) 85%, white); color: #041008; }
.btn--ghost { --btn-fg: var(--muted); border-color: var(--line-strong); }
.btn--ghost:hover { color: var(--fg); border-color: var(--line-strong); background: var(--panel-2); }
.btn--sm { min-height: 27px; padding: 3px 8px; font-size: 0.68rem; }
.btn svg { width: 13px; height: 13px; }
.btn-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }

input[type="text"], input[type="search"], input[type="number"], input[type="url"], select, textarea {
  width: 100%;
  font: inherit;
  font-size: 0.8rem;
  color: var(--fg);
  background: var(--bg-raised);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  padding: 7px 9px;
  min-height: 34px;
}
input:hover, select:hover, textarea:hover { border-color: var(--dim); }
input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 1px var(--accent-line); }
select { cursor: pointer; }
textarea { resize: vertical; line-height: 1.6; }
textarea.hex-input, input.hex-input { font-size: 0.78rem; letter-spacing: 0.02em; }
input[type="checkbox"] {
  appearance: none;
  width: 14px;
  height: 14px;
  border: 1px solid var(--accent-line);
  border-radius: 1px;
  background: transparent;
  display: inline-grid;
  place-content: center;
  cursor: pointer;
  margin: 0;
  flex: 0 0 auto;
}
input[type="checkbox"]::before {
  content: "";
  width: 8px;
  height: 8px;
  transform: scale(0);
  background: var(--accent);
  clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}
input[type="checkbox"]:checked::before { transform: scale(1); }
input[type="checkbox"]:checked { border-color: var(--accent); }

.form-note { color: var(--dim); font-size: 0.68rem; line-height: 1.5; margin: 6px 0 0; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 14px; }
.field-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field-grid > .span-2 { grid-column: 1 / -1; }
.form-field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.form-field > label, .form-label {
  color: var(--muted);
  font-size: 0.68rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.form-field > label .units { color: var(--dim); font-size: 0.62rem; }

/* ---------- home hero ---------- */
.hero {
  position: relative;
  padding: 64px 0 48px;
  border-bottom: 1px dashed var(--line);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -40px -10%;
  background-image:
    linear-gradient(rgba(126, 231, 135, 0.075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 231, 135, 0.075) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(ellipse 70% 60% at 45% 35%, black, transparent);
  transform: translate3d(var(--grid-shift-x, 0px), var(--grid-shift-y, 0px), 0);
  transition: transform 220ms ease-out;
  pointer-events: none;
}
.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 56px;
  align-items: center;
}
.eyebrow {
  color: var(--accent);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::after { content: ""; height: 1px; flex: 1; background: repeating-linear-gradient(90deg, var(--accent-line) 0 2px, transparent 2px 6px); }
.hero h1 {
  font-size: clamp(2.3rem, 5.4vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.065em;
  margin: 0 0 18px;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero__lead {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
  max-width: 54ch;
  margin: 0 0 24px;
}
.hero__lead strong { color: var(--fg); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  color: var(--dim);
  font-size: 0.7rem;
}
.hero__stats b { color: var(--fg); font-weight: 500; }

.hero-art {
  position: relative;
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, var(--panel-2), var(--bg-raised));
  box-shadow: var(--shadow);
  border-radius: 3px;
  transform: rotate(0.4deg);
}
.hero-art::before {
  content: "";
  position: absolute;
  inset: 6px -6px -6px 6px;
  border: 1px dashed var(--line);
  border-radius: 3px;
  z-index: -1;
}
.hero-art__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  color: var(--dim);
  font-size: 0.66rem;
}
.hero-art__bar .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--line-strong); }
.hero-art__bar .dot:first-child { background: var(--bad); }
.hero-art__bar .dot:nth-child(2) { background: var(--warn); }
.hero-art__bar .dot:nth-child(3) { background: var(--good); }
.hero-art__bar span:last-child { margin-left: 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hero-art__body { padding: 14px; }
.hero-art__label { color: var(--dim); font-size: 0.62rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 9px; }
.mini-bits {
  display: grid;
  grid-template-columns: repeat(32, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  padding: 1px;
  background: var(--bg);
}
.mini-bits span {
  height: 18px;
  background: color-mix(in srgb, var(--tone) 28%, transparent);
  border-top: 2px solid color-mix(in srgb, var(--tone) 68%, transparent);
}
.mini-bits span.gap { background: transparent; border-color: transparent; }
.hero-art__fields {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-bottom: 10px;
}
.hero-art__fields div {
  padding: 6px 7px;
  border: 1px solid var(--line);
  background: var(--panel);
  min-width: 0;
}
.hero-art__fields b { display: block; color: var(--fg); font-size: 0.68rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hero-art__fields small { color: var(--dim); font-size: 0.56rem; }
.hero-art__hex {
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.9;
  display: grid;
  grid-template-columns: 3.2ch 1fr;
  gap: 0 8px;
  margin-top: 12px;
}
.hero-art__hex .off { color: var(--dim); }
.hero-art__hex .bytes b { color: var(--accent); font-weight: 500; }
.hero-art__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  color: var(--dim);
  font-size: 0.62rem;
}
.hero-art__foot .ok { color: var(--good); }

/* ---------- stats strip ---------- */
.strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px dashed var(--line);
}
.strip > div {
  padding: 18px 20px;
  border-right: 1px dashed var(--line);
  min-width: 0;
}
.strip > div:last-child { border-right: 0; }
.strip b { display: block; color: var(--fg); font-size: 1.15rem; font-weight: 500; }
.strip span { color: var(--dim); font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.08em; }

/* ---------- home sections ---------- */
.home-section { padding: 44px 0 0; scroll-margin-top: calc(var(--header-h) + 24px); }
.home-section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}
.home-section__head h2 { margin: 0; }
.home-section__head > p { margin: 0; color: var(--dim); font-size: 0.72rem; text-align: right; }
.kicker { color: var(--accent); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; margin: 0 0 6px; }

.protocol-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.protocol-card {
  display: flex;
  flex-direction: column;
  min-height: 205px;
  padding: 16px;
  border: 1px dashed var(--line-strong);
  background: linear-gradient(160deg, var(--panel), var(--bg-raised));
  text-decoration: none;
  color: var(--fg);
  border-radius: 2px;
  position: relative;
  transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
}
.protocol-card:hover {
  border-color: var(--accent-line);
  background: linear-gradient(160deg, var(--panel-2), var(--bg-raised));
  color: var(--fg);
  transform: translateY(-2px);
}
.protocol-card::after {
  content: "open ->";
  position: absolute;
  right: 14px;
  bottom: 12px;
  color: var(--dim);
  font-size: 0.62rem;
  opacity: 0;
  transition: opacity 120ms ease;
}
.protocol-card:hover::after { opacity: 1; color: var(--accent); }
.protocol-card__top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; margin-bottom: 6px; }
.protocol-card__num { color: var(--dim); font-size: 0.62rem; }
.protocol-card__rfc { color: var(--accent); font-size: 0.6rem; border: 1px solid var(--accent-line); padding: 1px 5px; white-space: nowrap; }
.protocol-card h3 { margin: 0 0 7px; font-size: 1.08rem; color: var(--fg); }
.protocol-card p { color: var(--muted); font-size: 0.74rem; line-height: 1.6; margin: 0 0 14px; }
.protocol-card__bits { display: flex; gap: 2px; margin-top: auto; margin-bottom: 12px; height: 14px; }
.protocol-card__bits i {
  display: block;
  height: 100%;
  background: color-mix(in srgb, var(--tone) 26%, transparent);
  border-top: 2px solid color-mix(in srgb, var(--tone) 60%, transparent);
  flex: var(--span) 1 0;
  min-width: 2px;
}
.protocol-card__meta { display: flex; flex-wrap: wrap; gap: 4px 12px; color: var(--dim); font-size: 0.62rem; }
.protocol-card__meta span::before { content: "·"; margin-right: 5px; color: var(--dim); }
.protocol-card__meta span:first-child::before { content: none; }


/* interactive TCP/IP stack map */
.stack-model {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  border-radius: 3px;
  overflow: hidden;
}
.stack-model__head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 12px;
  border-bottom: 1px dashed var(--line-strong);
  background: var(--panel-2);
  color: var(--dim);
  font-size: 0.62rem;
}
.stack-model__head span:first-child { color: var(--accent); letter-spacing: 0.08em; text-transform: uppercase; }
.stack-layer {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  border-bottom: 1px dashed var(--line);
  transition: background 100ms ease;
}
.stack-layer.is-active { background: var(--accent-soft); }
.stack-layer--overlay {
  background-image: repeating-linear-gradient(135deg, transparent 0 9px, rgba(230, 237, 243, 0.018) 9px 10px);
}
.stack-layer__filter {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 13px 14px;
  border: 0;
  border-right: 1px dashed var(--line);
  border-radius: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  appearance: none;
}
.stack-layer__filter:hover:not(.stack-layer__filter--static) { background: var(--accent-soft); }
.stack-layer__filter.is-active { box-shadow: inset 3px 0 0 var(--accent); background: var(--accent-soft); }
.stack-layer__filter--static { cursor: default; }
.stack-layer__text { min-width: 0; }
.stack-layer__text b { display: block; color: var(--fg); font-size: 0.76rem; font-weight: 600; line-height: 1.35; }
.stack-layer__text small { display: block; color: var(--dim); font-size: 0.57rem; line-height: 1.5; }
.stack-layer__count {
  margin-left: auto;
  color: var(--dim);
  font-size: 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  padding: 1px 5px;
  line-height: 1.45;
  flex: 0 0 auto;
}
.stack-layer__body {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  min-width: 0;
  padding: 12px 14px;
}
.stack-node {
  --tone: var(--tone-a);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  min-width: 170px;
  min-height: 47px;
  padding: 7px 10px;
  border: 1px solid color-mix(in srgb, var(--tone) 30%, transparent);
  border-left: 3px solid color-mix(in srgb, var(--tone) 72%, transparent);
  background: color-mix(in srgb, var(--tone) 10%, var(--panel));
  color: var(--fg);
  text-decoration: none;
  border-radius: 1px;
}
.stack-node:hover {
  color: var(--fg);
  background: color-mix(in srgb, var(--tone) 19%, var(--panel));
  border-color: color-mix(in srgb, var(--tone) 68%, transparent);
}
.stack-node__name { color: color-mix(in srgb, var(--tone) 70%, white); font-size: 0.7rem; font-weight: 700; line-height: 1.3; }
.stack-node__note { color: var(--muted); font-size: 0.57rem; line-height: 1.35; }
.stack-node--planned {
  min-width: 0;
  min-height: 47px;
  border-style: dashed;
  border-left: 3px dashed var(--line-strong);
  background: transparent;
  color: var(--dim);
}
.stack-node--planned .stack-node__name { color: var(--dim); font-size: 0.64rem; }
.stack-node--planned small { color: var(--dim); font-size: 0.5rem; }
.stack-layer__placeholder { color: var(--dim); font-size: 0.65rem; }
.stack-model__foot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-top: 1px dashed var(--line-strong);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 0.66rem;
}
.stack-model__foot div b { display: block; color: var(--fg); font-size: 0.7rem; font-weight: 500; line-height: 1.35; }
.stack-model__foot div small { display: block; color: var(--dim); font-size: 0.56rem; line-height: 1.4; }
.stack-model__foot a { margin-left: auto; color: var(--accent); text-decoration: none; white-space: nowrap; font-size: 0.64rem; }
.stack-model__foot a:hover { text-decoration: underline; }

.protocol-card__meta .layer { color: var(--accent); }

/* browse-by-layer filter */
.protocol-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 10px 0;
  margin: 0 0 16px;
  border-top: 1px dashed var(--line);
  border-bottom: 1px dashed var(--line);
}
.protocol-filter__label {
  color: var(--dim);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}
.protocol-filter__chips { display: flex; flex-wrap: wrap; gap: 5px; min-width: 0; }
.layer-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.64rem;
  line-height: 1.3;
  padding: 3px 8px;
  cursor: pointer;
  white-space: nowrap;
  appearance: none;
}
.layer-chip b { color: var(--dim); font-size: 0.58rem; font-weight: 500; }
.layer-chip:hover { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }
.layer-chip.is-active { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }
.layer-chip.is-active b { color: var(--accent); }
.layer-chip:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.protocol-filter__status { margin-left: auto; color: var(--dim); font-size: 0.6rem; white-space: nowrap; }

/* encapsulation path shown on each protocol page */
.stackbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px 18px;
  margin: 16px 0 0;
  padding: 9px 11px;
  border: 1px solid var(--line-strong);
  border-left: 2px solid var(--accent);
  background: var(--panel);
}
.stackbar__layer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-right: 14px;
  border-right: 1px dashed var(--line);
  min-width: 0;
}
.stackbar__layer b { display: block; color: var(--fg); font-size: 0.68rem; font-weight: 500; line-height: 1.3; }
.stackbar__layer small { display: block; color: var(--dim); font-size: 0.56rem; line-height: 1.4; }
.layer-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.4ch;
  padding: 2px 5px;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.6rem;
  font-weight: 700;
  line-height: 1.4;
  white-space: nowrap;
}
.stackbar__path {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3px 7px;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}
.stackbar__path li {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  color: var(--muted);
  font-size: 0.65rem;
  line-height: 1.5;
}
.stackbar__path li span, .stackbar__path li a { white-space: nowrap; }
.stackbar__path li a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px dotted var(--line-strong);
}
.stackbar__path li a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.stackbar__path li small { color: var(--dim); font-size: 0.54rem; white-space: nowrap; }
.stackbar__path li.is-current { color: var(--accent); }
.stackbar__path li.is-current span { font-weight: 700; }
.stackbar__arrow { color: var(--dim); font-size: 0.63rem; }


.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.feature {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 16px;
  min-width: 0;
}
.feature__icon { color: var(--accent); font-size: 0.75rem; margin-bottom: 8px; }
.feature h3 { font-size: 0.85rem; margin: 0 0 6px; }
.feature p { color: var(--muted); font-size: 0.72rem; margin: 0; line-height: 1.6; }
.feature code { font-size: 0.8em; }

.home-search {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  padding: 18px;
  margin-top: 12px;
}
.home-search__row { display: flex; gap: 10px; }
.home-search__row input { flex: 1; font-size: 0.86rem; }
.home-search__meta { display: flex; justify-content: space-between; gap: 12px; color: var(--dim); font-size: 0.65rem; margin-top: 7px; }
.home-search__results { margin: 14px 0 0; padding: 0; list-style: none; }
.home-search__results li { border-top: 1px dashed var(--line); }
.home-search__results a {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 8px 2px;
  text-decoration: none;
  font-size: 0.74rem;
}
.home-search__results a:hover { background: var(--row-hl); }
.home-search__results .p { color: var(--accent); font-size: 0.62rem; text-transform: uppercase; }
.home-search__results .m { color: var(--dim); font-size: 0.66rem; text-align: right; white-space: nowrap; }
.home-search__results .empty { color: var(--dim); font-size: 0.72rem; padding: 12px 2px; }

/* ---------- bit diagrams ---------- */
.diagram {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  border-radius: 3px;
  overflow: hidden;
  margin: 18px 0;
}
.diagram__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 14px;
  padding: 9px 12px;
  border-bottom: 1px dashed var(--line-strong);
  background: var(--panel-2);
  color: var(--dim);
  font-size: 0.66rem;
}
.diagram__title { color: var(--muted); }
.diagram__title b { color: var(--fg); font-weight: 500; }
.diagram__head .legend { display: flex; gap: 12px; flex-wrap: wrap; }
.diagram__head .legend span { display: inline-flex; align-items: center; gap: 5px; }
.diagram__head .legend i { display: inline-block; width: 8px; height: 8px; background: var(--accent); }
.diagram__scroll { overflow-x: auto; padding: 14px 12px 16px; }
.diagram__inner { min-width: 690px; }
.diagram__ruler {
  display: grid;
  grid-template-columns: 5.6ch minmax(0, 1fr);
  gap: 8px;
  margin-bottom: 5px;
}
.diagram__ruler-label { color: var(--dim); font-size: 0.55rem; padding-top: 1px; letter-spacing: 0.04em; }
.diagram__ruler-track {
  display: grid;
  grid-template-columns: repeat(32, minmax(0, 1fr));
  color: var(--dim);
  font-size: 0.52rem;
  line-height: 1;
}
.diagram__ruler-track span { padding-left: 1px; border-left: 1px solid transparent; }
.diagram__ruler-track span.tick { border-left-color: var(--line); }
.diagram__ruler-track span.byte { color: var(--muted); border-left-color: var(--line-strong); }
.diagram__row {
  display: grid;
  grid-template-columns: 5.6ch minmax(0, 1fr);
  gap: 8px;
  margin-bottom: 3px;
}
.diagram__offset {
  color: var(--dim);
  font-size: 0.56rem;
  line-height: 1.3;
  padding-top: 7px;
  white-space: nowrap;
}
.diagram__track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(32, minmax(0, 1fr));
  min-height: 46px;
  background-color: var(--bg-raised);
  background-image:
    repeating-linear-gradient(90deg,
      transparent 0,
      transparent calc(var(--cell, 3.125%) - 1px),
      rgba(230, 237, 243, 0.035) calc(var(--cell, 3.125%) - 1px),
      rgba(230, 237, 243, 0.035) var(--cell, 3.125%)),
    repeating-linear-gradient(90deg,
      transparent 0,
      transparent calc(var(--group, 25%) - 1px),
      rgba(230, 237, 243, 0.1) calc(var(--group, 25%) - 1px),
      rgba(230, 237, 243, 0.1) var(--group, 25%));
  border: 1px solid var(--line);
  border-radius: 1px;
}
.diagram--byte-rows .diagram__inner { min-width: 0; }
.diagram--byte-rows .diagram__track { min-height: 58px; }
.diagram--byte-rows .diagram__ruler { margin-bottom: 6px; }
.diagram--byte-rows .diagram__field .f-name { font-size: 0.64rem; }
.diagram--byte-rows .diagram__field .f-meta { display: block; font-size: 0.52rem; }
.diagram--byte-rows .diagram__ruler-track { font-size: 0.62rem; }
.diagram--byte-rows .diagram__field.is-tiny .f-name { writing-mode: horizontal-tb; transform: none; font-size: 0.58rem; }
.diagram--byte-rows .diagram__field.is-tiny .f-meta { display: block; font-size: 0.5rem; }
.diagram__field {
  --tone: var(--tone-a);
  position: relative;
  font: inherit;
  appearance: none;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  min-width: 0;
  margin: 2px 1px;
  padding: 3px 4px;
  border: 1px solid color-mix(in srgb, var(--tone) 32%, transparent);
  border-top: 2px solid color-mix(in srgb, var(--tone) 72%, transparent);
  background: color-mix(in srgb, var(--tone) 11%, var(--panel));
  border-radius: 1px;
  cursor: pointer;
  text-align: center;
  overflow: hidden;
  transition: background 90ms ease, border-color 90ms ease, box-shadow 90ms ease;
}
.diagram__field:hover, .diagram__field.is-hot {
  background: color-mix(in srgb, var(--tone) 20%, var(--panel));
  border-color: color-mix(in srgb, var(--tone) 80%, white 5%);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--tone) 55%, transparent);
  z-index: 3;
}
.diagram__field.is-selected {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  background: color-mix(in srgb, var(--accent) 14%, var(--panel));
  z-index: 4;
}
.diagram__field.is-cont {
  background: repeating-linear-gradient(135deg,
    color-mix(in srgb, var(--tone) 9%, var(--panel)) 0 5px,
    color-mix(in srgb, var(--tone) 5%, var(--panel)) 5px 10px);
}
.diagram__field .f-name {
  color: color-mix(in srgb, var(--tone) 72%, white);
  font-size: 0.58rem;
  font-weight: 700;
  line-height: 1.15;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -0.02em;
}
.diagram__field .f-meta {
  color: var(--muted);
  font-size: 0.48rem;
  line-height: 1.1;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.diagram__field.is-narrow .f-name { font-size: 0.5rem; }
.diagram__field.is-narrow .f-meta { display: none; }
.diagram__field.is-tiny .f-name { writing-mode: vertical-rl; transform: rotate(180deg); font-size: 0.46rem; }
.diagram__field[data-variable="1"] {
  border-right-style: dashed;
  background-image: repeating-linear-gradient(135deg, transparent 0 4px, color-mix(in srgb, var(--tone) 7%, transparent) 4px 8px);
}
.diagram__field .f-ellipsis { color: var(--dim); font-size: 0.55rem; }
.diagram__note {
  color: var(--dim);
  font-size: 0.63rem;
  line-height: 1.55;
  padding: 8px 12px;
  border-top: 1px dashed var(--line);
  margin: 0;
}
.diagram__note b { color: var(--muted); font-weight: 500; }
.diagram--compact .diagram__inner { min-width: 440px; }
.diagram--compact .diagram__track { min-height: 38px; }
.diagram--compact .diagram__field .f-meta { display: none; }

/* field inspector */
.field-detail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 24px;
  border: 1px solid var(--line-strong);
  border-left: 2px solid var(--accent);
  background: var(--panel);
  padding: 14px 16px;
  margin: -4px 0 22px;
  min-height: 94px;
}
.field-detail__eyebrow { color: var(--dim); font-size: 0.58rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 4px; }
.field-detail__name { color: var(--accent); font-size: 1rem; font-weight: 700; margin: 0 0 4px; }
.field-detail__desc { color: var(--muted); font-size: 0.76rem; line-height: 1.65; margin: 0; max-width: 76ch; }
.field-detail__desc code { font-size: 0.82em; }
.field-detail__side { text-align: right; min-width: 120px; }
.field-detail__bits { color: var(--fg); font-size: 0.8rem; }
.field-detail__bits small { color: var(--dim); display: block; font-size: 0.6rem; }
.field-detail__rfc { display: inline-block; margin-top: 6px; color: var(--accent); font-size: 0.66rem; text-decoration: none; border-bottom: 1px dotted var(--accent-line); }
.field-detail__rfc:hover { border-bottom-style: solid; }
.field-detail__range { color: var(--muted); font-size: 0.64rem; margin-top: 5px; display: block; }
.field-detail__hint { color: var(--dim); font-size: 0.6rem; margin-top: 8px; display: block; }

/* field table */
.table-wrap { overflow-x: auto; border: 1px solid var(--line-strong); margin: 18px 0; background: var(--bg-raised); }
table.data-table { border-collapse: collapse; width: 100%; min-width: 540px; }
table.data-table th, table.data-table td {
  border: 1px dashed var(--line);
  padding: 6px 9px;
  text-align: left;
  vertical-align: top;
}
table.data-table th {
  color: var(--accent);
  background: var(--panel-2);
  font-size: 0.62rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
table.data-table td { font-size: 0.78rem; color: var(--muted); }
table.data-table td b, table.data-table td strong { color: var(--fg); }
table.data-table td code { color: var(--accent); white-space: nowrap; font-size: 0.9em; }
table.data-table tr:hover td { background: var(--row-hl); }
table.data-table tr.is-hot td { background: var(--row-hl); }
table.data-table tr[data-field] { cursor: pointer; }
table.data-table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
table.data-table .nowrap { white-space: nowrap; }
table.data-table .small { font-size: 0.65rem; color: var(--dim); }
table.data-table td .flag-tag {
  display: inline-block;
  min-width: 2.6ch;
  text-align: center;
  border: 1px solid var(--line-strong);
  color: var(--fg);
  font-size: 0.6rem;
  padding: 0 3px;
  margin-right: 4px;
}
.tone-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--tone); margin-right: 5px; vertical-align: 1px; }

/* flag explorer */
.flag-box {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  margin: 18px 0;
}
.flag-box__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-bottom: 1px dashed var(--line-strong);
  color: var(--muted);
  font-size: 0.68rem;
}
.flag-box__body { padding: 14px 12px; }
.flag-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(82px, 1fr)); gap: 6px; }
.flag-toggle { position: relative; }
.flag-toggle input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.flag-toggle span {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  padding: 8px 3px 7px;
  border: 1px solid var(--line-strong);
  background: var(--bg-raised);
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  text-align: center;
  border-radius: 2px;
  line-height: 1.25;
}
.flag-toggle span b { font-size: 0.85rem; color: var(--fg); font-weight: 700; }
.flag-toggle span small { color: var(--muted); font-size: 0.5rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.flag-toggle span .bitno { color: var(--muted); font-size: 0.5rem; }
.flag-toggle input:checked + span {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent-line);
}
.flag-toggle input:checked + span b { color: var(--accent); }
.flag-toggle input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.flag-toggle:hover span { border-color: var(--accent-line); }
.flag-readout {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  border-top: 1px dashed var(--line);
  padding-top: 12px;
  margin-top: 12px;
  font-size: 0.7rem;
  color: var(--dim);
}
.flag-readout b { color: var(--fg); font-weight: 500; font-size: 0.86rem; }
.flag-readout .tcpdump { color: var(--accent); font-size: 0.92rem; }
.flag-readout .spacer { flex: 1; }
.flag-box__note { color: var(--dim); font-size: 0.64rem; line-height: 1.55; padding: 0 12px 12px; margin: 0; }

/* small bit strip for flag octets */
.bit-strip { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 2px; min-width: 300px; }
.bit-strip div {
  border: 1px solid var(--line);
  background: var(--bg-raised);
  text-align: center;
  padding: 4px 1px;
  font-size: 0.58rem;
  color: var(--dim);
  line-height: 1.2;
  min-width: 0;
}
.bit-strip div b { display: block; color: var(--muted); font-size: 0.7rem; font-weight: 500; }
.bit-strip div.on { border-color: var(--accent-line); background: var(--accent-soft); color: var(--accent); }
.bit-strip div.on b { color: var(--accent); }


/* ---------- byte lane diagrams ---------- */
.byte-lane {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  border-radius: 3px;
  overflow: hidden;
  margin: 18px 0;
}
.byte-lane__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 9px 12px;
  border-bottom: 1px dashed var(--line-strong);
  background: var(--panel-2);
  color: var(--dim);
  font-size: 0.66rem;
}
.byte-lane__title { color: var(--muted); }
.byte-lane__title b { color: var(--fg); font-weight: 500; }
.byte-lane__legend { display: flex; flex-wrap: wrap; gap: 12px; }
.byte-lane__legend span { display: inline-flex; align-items: center; gap: 5px; }
.byte-lane__legend i { width: 8px; height: 8px; background: var(--accent); display: inline-block; }
.byte-lane__scroll { overflow-x: auto; padding: 14px 12px 10px; }
.byte-lane__inner { min-width: 520px; }
.byte-lane--compact .byte-lane__inner { min-width: 380px; }
.byte-lane__track {
  display: grid;
  grid-template-columns: var(--cols, repeat(auto-fit, minmax(0, 1fr)));
  gap: 2px;
  min-height: 66px;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  padding: 2px;
}
.byte-field {
  --tone: var(--tone-a);
  appearance: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 1px;
  padding: 5px 6px;
  border: 1px solid color-mix(in srgb, var(--tone) 30%, transparent);
  border-top: 3px solid color-mix(in srgb, var(--tone) 72%, transparent);
  background: color-mix(in srgb, var(--tone) 10%, var(--panel));
  color: var(--fg);
  font: inherit;
  text-align: left;
  cursor: pointer;
  border-radius: 1px;
  min-width: 0;
  overflow: hidden;
  transition: background 90ms ease, border-color 90ms ease;
}
.byte-field:hover, .byte-field.is-hot {
  background: color-mix(in srgb, var(--tone) 20%, var(--panel));
  border-color: color-mix(in srgb, var(--tone) 80%, white 5%);
}
.byte-field.is-selected {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  background: color-mix(in srgb, var(--accent) 13%, var(--panel));
  z-index: 2;
}
.byte-field[data-variable="1"] {
  border-right-style: dashed;
  background-image: repeating-linear-gradient(135deg, transparent 0 4px, color-mix(in srgb, var(--tone) 7%, transparent) 4px 8px);
}
.byte-field .bf-name {
  color: color-mix(in srgb, var(--tone) 68%, white);
  font-size: 0.62rem;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.byte-field .bf-size { color: var(--muted); font-size: 0.56rem; line-height: 1.2; white-space: nowrap; }
.byte-field .bf-off { color: var(--muted); font-size: 0.5rem; line-height: 1.2; }
.byte-field .bf-ellipsis { position: absolute; }
.byte-field { position: relative; }
.byte-lane__ticks {
  display: grid;
  grid-template-columns: var(--cols, repeat(auto-fit, minmax(0, 1fr)));
  gap: 2px;
  padding: 3px 3px 0;
  color: var(--dim);
  font-size: 0.52rem;
}
.byte-lane__ticks span { min-width: 0; padding-left: 1px; border-left: 1px solid var(--line); overflow: hidden; white-space: nowrap; }
.byte-lane .diagram__note { border-top: 1px dashed var(--line); }
@media (max-width: 720px) {
  .byte-lane__inner { min-width: 460px; }
}

/* ---------- callouts ---------- */
.callout {
  border: 1px solid var(--line-strong);
  border-left: 2px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 4%, var(--panel));
  padding: 12px 14px;
  margin: 18px 0;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.65;
}
.callout__title { color: var(--accent); font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.09em; margin-bottom: 4px; }
.callout p:last-child { margin-bottom: 0; }
.callout--warn { border-left-color: var(--warn); background: color-mix(in srgb, var(--warn) 5%, var(--panel)); }
.callout--warn .callout__title { color: var(--warn); }
.callout--danger { border-left-color: var(--bad); background: color-mix(in srgb, var(--bad) 5%, var(--panel)); }
.callout--danger .callout__title { color: var(--bad); }
.callout code { font-size: 0.84em; }
.callout ul { margin: 6px 0 0; padding-left: 18px; }
.callout li { margin: 2px 0; }

ul.dashed { list-style: none; padding-left: 18px; margin: 0 0 16px; }
ul.dashed li { position: relative; margin: 4px 0; color: var(--muted); font-size: 0.78rem; }
ul.dashed li::before { content: "-"; position: absolute; left: -18px; color: var(--accent); }

/* ---------- codec ---------- */
.codec {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}
.codec-panel {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.codec-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 12px;
  border-bottom: 1px dashed var(--line-strong);
  background: var(--panel-2);
}
.codec-panel__head h3 { margin: 0; font-size: 0.74rem; color: var(--fg); font-weight: 500; }
.codec-panel__head .tag { color: var(--dim); font-size: 0.6rem; }
.codec-panel__body { padding: 14px 12px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.codec-panel__foot { padding: 0 12px 12px; margin-top: auto; }
.codec-panel--wide { grid-column: 1 / -1; }
.form-field label .lbl-flag { color: var(--accent); font-size: 0.6rem; }
.inline-checks { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; min-height: 34px; }
.inline-checks label { display: inline-flex; align-items: center; gap: 6px; font-size: 0.7rem; color: var(--muted); cursor: pointer; }
.output {
  border: 1px solid var(--line);
  background: var(--bg-raised);
  padding: 9px 10px;
  min-height: 48px;
  position: relative;
  overflow: hidden;
}
.output pre { color: var(--fg); white-space: pre-wrap; word-break: break-all; font-size: 0.76rem; }
.output .placeholder { color: var(--dim); font-size: 0.7rem; }
.output__label { color: var(--dim); font-size: 0.55rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 5px; }
.copy-btn {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.58rem;
  padding: 1px 6px;
  cursor: pointer;
  border-radius: 2px;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent-line); }
.codec-status { min-height: 1.2em; color: var(--dim); font-size: 0.64rem; line-height: 1.5; }
.codec-status.is-ok { color: var(--good); }
.codec-status.is-warn { color: var(--warn); }
.codec-status.is-bad { color: var(--bad); }
.codec-status b { color: inherit; font-weight: 500; }
.presets { display: flex; flex-wrap: wrap; gap: 5px; }
.presets button {
  border: 1px dashed var(--line-strong);
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.6rem;
  padding: 2px 6px;
  cursor: pointer;
  border-radius: 2px;
}
.presets button:hover { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }
.divider { border: 0; border-top: 1px dashed var(--line); margin: 2px 0; }
.codec-help { color: var(--dim); font-size: 0.64rem; line-height: 1.55; margin: 0; }
.codec-help code { font-size: 0.86em; }

/* hexdump */
.hexdump-wrap { margin: 12px 0 0; border: 1px solid var(--line); background: var(--bg-raised); }
.hexdump-head { display: flex; justify-content: space-between; gap: 10px; padding: 5px 9px; border-bottom: 1px dashed var(--line); color: var(--dim); font-size: 0.58rem; }
.hexdump {
  font-size: 0.68rem;
  line-height: 1.85;
  padding: 8px 9px;
  overflow-x: auto;
  white-space: pre;
  color: var(--muted);
}
.hexdump .hd-row { display: flex; gap: 12px; min-width: 340px; }
.hexdump .hd-off { color: var(--dim); flex: 0 0 3.2em; }
.hexdump .hd-bytes { color: var(--muted); flex: 1 1 0; min-width: 32.2em; letter-spacing: 0.04em; }
.hexdump .hd-bytes b { color: var(--accent); font-weight: 400; }
.hexdump .hd-bytes .sp { color: var(--dim); }
.hexdump .hd-ascii { color: var(--dim); flex: 0 0 11.2em; border-left: 1px solid var(--line); padding-left: 8px; }
.hexdump .hd-ascii b { color: var(--fg); font-weight: 400; }

/* decoded fields */
.decoded-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
  margin: 16px 0 8px;
}
.decoded-head h3 { margin: 0; font-size: 0.78rem; color: var(--muted); font-weight: 500; }
.decode-summary { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 0; }
.pill {
  border: 1px solid var(--line-strong);
  background: var(--bg-raised);
  color: var(--muted);
  font-size: 0.62rem;
  padding: 2px 7px;
  border-radius: 2px;
}
.pill b { color: var(--fg); font-weight: 500; }
.pill--good { color: var(--good); border-color: color-mix(in srgb, var(--good) 35%, transparent); }
.pill--warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 35%, transparent); }
.pill--bad { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 35%, transparent); }
.warn-text { color: var(--warn); }
.bad-text { color: var(--bad); }
.good-text { color: var(--good); }
.muted { color: var(--muted); }
.dim { color: var(--dim); }
.right { text-align: right; }
.mono { font-family: var(--mono); }

/* option / TLV bits */
.option-bits {
  display: grid;
  grid-template-columns: 1fr 1fr 5fr;
  gap: 2px;
  min-width: 300px;
  border: 1px solid var(--line);
  padding: 2px;
  background: var(--bg-raised);
}
.option-bits div {
  text-align: center;
  padding: 5px 2px;
  font-size: 0.58rem;
  color: var(--muted);
  border: 1px solid var(--line);
  background: var(--panel);
}
.option-bits div b { display: block; color: var(--accent); font-size: 0.66rem; font-weight: 500; }
.option-bits div small { color: var(--dim); font-size: 0.52rem; }
.option-bits div.span-one { grid-column: span 1; }
.option-bits--tcp { grid-template-columns: 1fr 1fr; }
.option-bits--tcp div { padding: 6px; }

/* tables for flag recipes */
.recipe-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin: 14px 0; }
.recipe {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 10px 11px;
  min-width: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  border-radius: 0;
}
.recipe:hover { border-color: var(--accent-line); background: var(--hover, color-mix(in srgb, var(--accent) 7%, var(--panel))); }
.recipe:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.recipe b { display: block; color: var(--fg); font-size: 0.72rem; font-weight: 500; }
.recipe code { display: inline-block; margin: 5px 0 4px; font-size: 0.74rem; }
.recipe span { color: var(--dim); font-size: 0.62rem; line-height: 1.5; display: block; }

/* endian demo */
.endian {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  padding: 9px 11px;
  font-size: 0.7rem;
  margin: 12px 0;
}
.endian b { color: var(--accent); font-weight: 500; }
.endian .arrow { color: var(--dim); }

/* tabs */
.tabs { display: flex; flex-wrap: wrap; gap: 2px; border-bottom: 1px solid var(--line); margin: 16px 0 0; }
.tab {
  border: 1px solid transparent;
  border-bottom: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 6px 10px;
  cursor: pointer;
  margin-bottom: -1px;
}
.tab:hover { color: var(--fg); background: var(--panel); }
.tab[aria-selected="true"] {
  border-color: var(--line-strong);
  border-bottom: 1px solid var(--bg);
  background: var(--panel);
  color: var(--accent);
}
.tab-panel { border: 1px solid var(--line-strong); border-top: 0; background: var(--panel); padding: 14px 12px; }
.tab-panel[hidden] { display: none; }

/* RFC list */
.rfc-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 18px; }
.rfc-list li { border-bottom: 1px dashed var(--line); padding: 5px 0; font-size: 0.73rem; color: var(--muted); display: flex; gap: 8px; }
.rfc-list li a { color: var(--accent); text-decoration: none; white-space: nowrap; }
.rfc-list li span { color: var(--dim); font-size: 0.66rem; }

/* footer */
.site-footer {
  border-top: 1px dashed var(--line-strong);
  margin-top: 20px;
  padding: 26px 0 40px;
}
.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px 30px;
  color: var(--dim);
  font-size: 0.68rem;
  line-height: 1.7;
}
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.site-footer .foot-brand { color: var(--accent); }
.site-footer .foot-links { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.site-footer .foot-note { max-width: 52ch; }

/* ---------- search dialog ---------- */
.search-dialog {
  width: min(680px, calc(100vw - 28px));
  max-height: min(78vh, 720px);
  padding: 0;
  border: 1px solid var(--accent-line);
  background: var(--panel);
  color: var(--fg);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6);
  border-radius: 3px;
  margin: 12vh auto auto;
}
.search-dialog::backdrop { background: rgba(4, 7, 11, 0.72); backdrop-filter: blur(4px); }
.search-dialog__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--accent);
}
.search-dialog__head svg { width: 15px; height: 15px; flex: 0 0 auto; }
.search-dialog__head input {
  border: 0;
  background: transparent;
  padding: 0;
  min-height: 26px;
  font-size: 0.9rem;
  box-shadow: none;
}
.search-dialog__head input:focus { box-shadow: none; }
.search-dialog__head kbd { margin-left: auto; flex: 0 0 auto; }
.search-dialog__body { padding: 8px 8px 10px; overflow-y: auto; max-height: calc(78vh - 58px); }
.search-dialog__group { color: var(--dim); font-size: 0.58rem; text-transform: uppercase; letter-spacing: 0.1em; padding: 9px 8px 4px; }
.search-dialog__list { list-style: none; margin: 0; padding: 0; }
.search-dialog__list button {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  text-align: left;
  padding: 7px 8px;
  cursor: pointer;
  border-radius: 2px;
  font-size: 0.74rem;
}
.search-dialog__list button:hover, .search-dialog__list button[aria-selected="true"] {
  background: var(--accent-soft);
  color: var(--fg);
}
.search-dialog__list .p { color: var(--accent); font-size: 0.6rem; text-transform: uppercase; }
.search-dialog__list .n { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-dialog__list .m { color: var(--dim); font-size: 0.62rem; white-space: nowrap; }
.search-dialog__empty { color: var(--dim); font-size: 0.72rem; padding: 18px 10px 22px; }
.search-dialog__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding: 8px 14px;
  border-top: 1px dashed var(--line);
  color: var(--dim);
  font-size: 0.6rem;
}
.search-dialog__foot kbd { font-size: 0.58rem; }
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 12px);
  z-index: 300;
  background: var(--accent);
  color: #041008;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 7px 12px;
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease, transform 140ms ease;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- tools ---------- */
.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.tool-card {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.tool-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px dashed var(--line-strong);
  background: var(--panel-2);
}
.tool-card__head h3 { margin: 0; font-size: 0.8rem; }
.tool-card__head span { color: var(--dim); font-size: 0.58rem; }
.tool-card__body { padding: 12px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.tool-card__body > p { margin: 0; color: var(--dim); font-size: 0.68rem; line-height: 1.55; }
.tool-card--wide { grid-column: 1 / -1; }
.tool-result {
  border: 1px solid var(--line);
  background: var(--bg-raised);
  padding: 9px 10px;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.7;
  min-height: 42px;
}
.tool-result b { color: var(--accent); font-weight: 500; }
.tool-result .err { color: var(--bad); }
.tool-result .ok { color: var(--good); }
.tool-result .warn { color: var(--warn); }
.tool-result .row { display: flex; justify-content: space-between; gap: 14px; }
.tool-result .row + .row { border-top: 1px dashed var(--line); margin-top: 4px; padding-top: 4px; }
.tool-row { display: flex; gap: 8px; align-items: stretch; }
.tool-row input, .tool-row select { flex: 1; }
.tool-row .btn { flex: 0 0 auto; }
.check-row { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; font-size: 0.7rem; color: var(--muted); }
.check-row label { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }
.swatch-row { display: flex; flex-wrap: wrap; gap: 6px; }

/* about page */
.prose { max-width: 76ch; }
.prose p { color: var(--muted); font-size: 0.84rem; line-height: 1.8; }
.prose h2 { margin-top: 34px; }
.prose h3 { margin-top: 24px; color: var(--fg); }
.prose ul, .prose ol { color: var(--muted); font-size: 0.8rem; padding-left: 20px; }
.prose li { margin: 4px 0; }
.prose code { font-size: 0.84em; }
.about-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 18px 0; }
.about-box { border: 1px solid var(--line); background: var(--panel); padding: 14px; }
.about-box h3 { margin: 0 0 6px; font-size: 0.82rem; }
.about-box p { margin: 0; color: var(--muted); font-size: 0.72rem; line-height: 1.6; }
.about-box code { font-size: 0.82em; }
.keymap { display: grid; grid-template-columns: 100px 1fr; gap: 6px 12px; font-size: 0.72rem; color: var(--muted); }
.keymap kbd { justify-self: start; }

/* page end / next protocol */
.next-protocol {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border-top: 1px dashed var(--line-strong);
  padding-top: 16px;
  margin-top: 8px;
  font-size: 0.72rem;
}
.next-protocol span { color: var(--dim); }
.next-protocol a { color: var(--accent); text-decoration: none; }
.next-protocol a:hover { text-decoration: underline; }

/* utilities */
.stack { display: flex; flex-direction: column; gap: 10px; }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.hidden, [hidden] { display: none !important; }
.nowrap { white-space: nowrap; }
.small { font-size: 0.7rem; }
.center { text-align: center; }


/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .hero__inner { gap: 34px; }
  .protocol-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
  .page-shell { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 26px; }
  .rail { display: none; }
  .mobile-nav-btn { display: inline-flex; }
  .mobile-toc { display: block; margin: 0 0 18px; border: 1px solid var(--line-strong); background: var(--panel); }
  .shell > .mobile-toc { margin-top: 18px; margin-bottom: 0; }
  .toc { display: none; }
  .hero__inner { grid-template-columns: minmax(0, 1fr); }
  .hero-art { max-width: 560px; transform: none; }
  .hero-art::before { display: none; }
  .codec { grid-template-columns: minmax(0, 1fr); }
  .tool-grid { grid-template-columns: minmax(0, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  :root { --header-h: 56px; }
  body { font-size: 14px; }
  .shell, .site-header__inner, .site-footer__inner { padding-left: 16px; padding-right: 16px; }
  .site-header__inner { gap: 8px; flex-wrap: wrap; height: auto; min-height: 56px; padding-top: 6px; }
  .brand { order: 1; }
  .header-tools { order: 2; margin-left: auto; }
  .brand__rule { display: none; }
  .brand__box { font-size: 0.72rem; padding: 4px 7px 3px; }
  .brand__cursor { width: 5px; height: 11px; }
  .site-header { box-shadow: 0 1px 0 var(--line); }
  .header-tools .kbd-hint { display: none; }
  .icon-btn { padding: 0 7px; }
  .hero { padding: 40px 0 34px; }
  .hero h1 { font-size: clamp(2rem, 10vw, 2.9rem); }
  .hero__lead { font-size: 0.9rem; }
  .hero__stats { gap: 8px 16px; }
  .strip { grid-template-columns: repeat(2, 1fr); }
  .strip > div:nth-child(2) { border-right: 0; }
  .strip > div:nth-child(-n+2) { border-bottom: 1px dashed var(--line); }
  .protocol-grid, .feature-grid, .recipe-grid, .about-grid, .rfc-list { grid-template-columns: minmax(0, 1fr); }
  .field-grid, .field-grid--three { grid-template-columns: minmax(0, 1fr); }
  .page-shell { padding-top: 18px; padding-bottom: 50px; }
  .home-section { padding-top: 32px; }
  .home-section__head { flex-direction: column; align-items: flex-start; gap: 4px; }
  .home-section__head > p { text-align: left; }
  .protocol-filter__status { margin-left: 0; width: 100%; }
  .stackbar { gap: 7px 12px; }
  .stackbar__layer { width: 100%; padding-right: 0; padding-bottom: 7px; border-right: 0; border-bottom: 1px dashed var(--line); }
  .stack-model__head span:last-child { display: none; }
  .stack-layer { grid-template-columns: minmax(0, 1fr); }
  .stack-layer__filter { border-right: 0; border-bottom: 1px dashed var(--line); padding: 10px 12px; }
  .stack-layer__body { padding: 11px 12px; }
  .stack-node { flex: 1 1 150px; min-width: 0; }
  .stack-model__foot { flex-wrap: wrap; }
  .stack-model__foot a { margin-left: 0; width: 100%; }
  .page-head .lead { font-size: 0.86rem; }
  .page-meta span { white-space: normal; }
  .field-detail { grid-template-columns: minmax(0, 1fr); }
  .field-detail__side { text-align: left; display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: baseline; }
  .field-detail__bits small { display: inline; }
  .field-detail__range { margin: 0; }
  .flag-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .flag-readout .spacer { display: none; }
  .diagram__scroll { padding-left: 8px; padding-right: 8px; }
  .section__head { flex-direction: column; align-items: flex-start; gap: 4px; }
  .section__hint { text-align: left; }
  .home-search__row { flex-direction: column; }
  .home-search__results a { grid-template-columns: 62px minmax(0, 1fr); }
  .home-search__results .m { display: none; }
  .search-dialog { margin-top: 6vh; }
  .search-dialog__list button { grid-template-columns: 64px minmax(0, 1fr); }
  .search-dialog__list .m { display: none; }
  .site-footer__inner { flex-direction: column; }
  .toc { gap: 4px; }
  .toc a { font-size: 0.64rem; }
  .next-protocol { align-items: flex-start; flex-direction: column; gap: 4px; }
  .endian { font-size: 0.64rem; }
}
@media (max-width: 430px) {
  .header-tools { gap: 4px; }
  .header-tools .icon-btn > span { display: none; }
  .header-tools .icon-btn { padding: 0 6px; }
  .header-tools .icon-btn--square { width: 28px; height: 28px; padding: 0; }
  .header-tools > a[href="about.html"] { display: none; }
  .mobile-nav ul { grid-template-columns: 1fr; }
  .mobile-toc ul { grid-template-columns: 1fr; }
  .flag-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .badges .badge:nth-child(n+5) { display: none; }
  .hero__actions .btn { flex: 1 1 100%; }
  .strip b { font-size: 1rem; }
  .strip > div { padding: 13px 12px; }
  .protocol-card { min-height: 190px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

@media print {
  .site-header, .site-footer, .rail, .toc, .search-dialog, .toast, .btn, .copy-btn, .presets { display: none !important; }
  body { background: white; color: black; }
  .diagram, .codec-panel, .tool-card, .field-detail { break-inside: avoid; }
  a { color: black; }
}

@media (max-width: 900px) {
  :root { --header-h: 56px; }
  .site-header__inner {
    gap: 8px;
    flex-wrap: wrap;
    height: auto;
    min-height: 56px;
    padding-top: 6px;
  }
  .brand { order: 1; }
  .header-tools { order: 2; margin-left: auto; }
  .brand__rule { display: none; }
  .icon-btn--search { min-width: 0; }
  .site-header { box-shadow: 0 1px 0 var(--line); }
  .mobile-nav { padding-left: 16px; padding-right: 16px; }
}
@media (min-width: 981px) {
  .mobile-nav { display: none !important; }
}

/* ---------- packet dissector ---------- */
.dissect-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(0, 1.55fr);
  gap: 14px;
  margin-top: 14px;
  align-items: start;
}
.dissect-tree {
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
  min-width: 0;
}
.dissect-tree__head,
.dissect-hexdump .hexdump-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 10px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.7rem;
  text-transform: lowercase;
  letter-spacing: 0.04em;
}
#dissect-tree { max-height: 560px; overflow: auto; }
.layer-node {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 10px 8px calc(10px + var(--depth, 0) * 14px);
  border: 0;
  border-bottom: 1px dashed var(--line);
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
  font: inherit;
}
.layer-node:hover { background: var(--row-hl); }
.layer-node.is-active {
  background: var(--accent-soft);
  box-shadow: inset 2px 0 0 var(--accent);
}
.layer-node.has-error .layer-node__name { color: var(--bad); }
.layer-node__marker {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--node-tone, var(--accent));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--node-tone, var(--accent)) 14%, transparent);
}
.layer-node__body { display: flex; flex-direction: column; gap: 1px; min-width: 0; flex: 1; }
.layer-node__name { font-size: 0.76rem; color: var(--fg); }
.layer-node__summary {
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.layer-node__len { color: var(--muted); font-size: 0.66rem; margin-left: auto; white-space: nowrap; }
.dissect-view { min-width: 0; }
.dissect-hexdump { min-width: 0; }
.dissect-detail__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin: 14px 0 8px;
}
.dissect-detail__head h3 { margin: 0; font-size: 0.92rem; }
.dissect-detail__head p { margin: 2px 0 0; font-size: 0.68rem; }
.dissect-detail__head .badge { flex: 0 0 auto; }
@media (max-width: 900px) {
  .dissect-layout { grid-template-columns: 1fr; }
  #dissect-tree { max-height: 320px; }
}
/* ---------- TLS key schedule ---------- */
.tls-flow {
  display: grid;
  gap: 10px;
  margin: 16px 0;
}
.tls-flow__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 10px;
  align-items: stretch;
}
.tls-flow__step {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
}
.tls-flow__step span {
  color: var(--accent);
  font-size: 0.68rem;
  letter-spacing: 0.02em;
}
.tls-flow__step code {
  display: block;
  color: var(--fg);
  background: transparent;
  padding: 0;
  font-size: 0.66rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.tls-flow__step small {
  color: var(--muted);
  font-size: 0.64rem;
  line-height: 1.45;
}
.tls-flow__arrow {
  align-self: center;
  color: var(--dim);
  font-size: 1rem;
}
.tls-message { margin-top: 16px; }

/* ---------- HTTP/2 frame cards ---------- */
.http-frame {
  margin-top: 14px;
  padding-top: 4px;
  border-top: 1px dashed var(--line);
}
.http-frame:first-of-type { border-top: 0; }
.http-frame .decoded-head { margin-top: 4px; }

@media (max-width: 700px) {
  .tls-flow__row { grid-template-columns: 1fr; }
  .tls-flow__arrow { justify-self: center; transform: rotate(90deg); }
}

/* Long protocol tokens in prose should not widen the page. */
.section p, .callout p { overflow-wrap: break-word; }