:root {
  --u: clamp(0.8px, calc(100vw / 1345), 1.6px);

  --bg: #050505;
  --panel: #0b0b0b;
  --panel-2: #141414;
  --line: #1f1f1f;
  --line-strong: #2f2f2f;
  --line-bright: #4a4a4a;
  --text: #a6a6a6;
  --text-dim: #6d6d6d;
  --text-menu: #cfcfcf;
  --text-bright: #ffffff;
  --select: #2b2b2b;
  --hover: #1d1d1d;
  --silver-1: #e9e9e9;
  --silver-2: #bdbdbd;
  --ink: #111111;
  --warn-bg: #2a1e0b;
  --warn-line: #5e4413;
  --warn-icon: #f0a020;
  --rank-red: #e2434f;
  --rank-magenta: #c04ac0;

  --ui: "Exo 2", "Segoe UI", system-ui, sans-serif;
  --body: "Roboto", "Segoe UI", system-ui, sans-serif;

  --frame-x: calc(18 * var(--u));
  --frame-y: calc(22 * var(--u));
  --topbar-h: calc(34 * var(--u));
  --topbar-px: calc(37 * var(--u));
  --col-menu: calc(212 * var(--u));
  --col-article: calc(705 * var(--u));
  --col-toc: calc(190 * var(--u));
  --bar: calc(6 * var(--u));

  --dur: 180ms;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body { font-size: calc(12.5 * var(--u)); }

::selection { background: #d9d9d9; color: #000; }

button, input { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
button[disabled] { cursor: default; }
a { color: #e6e6e6; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: calc(2 * var(--u)); }
:focus-visible { outline: 1px solid #fff; outline-offset: 1px; }

.app {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

.bg-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.026) 0 1px, transparent 1px calc(3.5 * var(--u))),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.026) 0 1px, transparent 1px calc(3.5 * var(--u)));
}

.bg-vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% 46%, rgba(255, 255, 255, 0.035) 0%, rgba(255, 255, 255, 0) 55%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.022) 0%, rgba(255, 255, 255, 0) 22%, rgba(255, 255, 255, 0) 78%, rgba(255, 255, 255, 0.018) 100%),
    radial-gradient(140% 120% at 50% 50%, rgba(0, 0, 0, 0) 45%, rgba(0, 0, 0, 0.75) 100%);
}

.frame {
  position: absolute;
  left: var(--frame-x);
  right: var(--frame-x);
  top: var(--frame-y);
  bottom: var(--frame-y);
  border: 1px solid #2a2a2a;
  pointer-events: none;
}

.bracket {
  position: absolute;
  width: calc(35 * var(--u));
  height: calc(35 * var(--u));
}
.bracket::before, .bracket::after {
  content: "";
  position: absolute;
  background: #fff;
}
.bracket::before { width: 100%; height: calc(2 * var(--u)); }
.bracket::after { width: calc(2 * var(--u)); height: 100%; }

.bracket-tl { top: calc(-1 * var(--u)); left: calc(-1 * var(--u)); }
.bracket-tl::before { top: 0; left: 0; }
.bracket-tl::after { top: 0; left: 0; }

.bracket-tr { top: calc(-1 * var(--u)); right: calc(-1 * var(--u)); }
.bracket-tr::before { top: 0; right: 0; }
.bracket-tr::after { top: 0; right: 0; }

.bracket-bl { bottom: calc(-1 * var(--u)); left: calc(-1 * var(--u)); }
.bracket-bl::before { bottom: 0; left: 0; }
.bracket-bl::after { bottom: 0; left: 0; }

.bracket-br { bottom: calc(-1 * var(--u)); right: calc(-1 * var(--u)); }
.bracket-br::before { bottom: 0; right: 0; }
.bracket-br::after { bottom: 0; right: 0; }

* {
  scrollbar-width: thin;
  scrollbar-color: #3a3a3a #0d0d0d;
}
::-webkit-scrollbar { width: var(--bar); height: var(--bar); }
::-webkit-scrollbar-track { background: #0d0d0d; border: 1px solid #1a1a1a; }
::-webkit-scrollbar-thumb { background: #3a3a3a; border: 0; }
::-webkit-scrollbar-thumb:hover { background: #5a5a5a; }
::-webkit-scrollbar-corner { background: #0d0d0d; }

.topbar {
  position: absolute;
  left: var(--frame-x);
  right: var(--frame-x);
  top: var(--frame-y);
  height: calc(var(--topbar-h) + 1px);
  padding: 0 var(--topbar-px);
  display: flex;
  align-items: center;
  gap: calc(14 * var(--u));
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: stretch;
  height: 100%;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  flex: none;
}

.menu-btn {
  flex: none;
  display: none;
  width: calc(30 * var(--u));
  height: 100%;
  place-items: center;
  border: 1px solid var(--line-strong);
  background: var(--panel);
}
.menu-btn svg { width: calc(14 * var(--u)); height: calc(14 * var(--u)); stroke: #cfcfcf; }

.nav-arrow {
  width: calc(30 * var(--u));
  display: grid;
  place-items: center;
  border-right: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}
.nav-arrow:first-child { border-right: 1px solid var(--line); }
.nav-arrow:hover:not([disabled]) { background: var(--hover); }
.nav-arrow svg { width: calc(11 * var(--u)); height: calc(11 * var(--u)); }
.nav-arrow[data-act="back"] svg { stroke: #fff; }
.nav-arrow[data-act="fwd"] svg { stroke: #555; }
.nav-arrow[data-act="fwd"]:hover:not([disabled]) svg { stroke: #6d6d6d; }
.nav-arrow[disabled] { cursor: default; }
.nav-arrow[disabled] svg { stroke: #3a3a3a; }

.tabs { display: flex; align-items: stretch; }
.tab {
  display: flex;
  align-items: center;
  padding: 0 calc(14 * var(--u));
  font-family: var(--ui);
  font-size: calc(11 * var(--u));
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #f0f0f0;
  background: var(--panel);
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  white-space: nowrap;
}
.tab + .tab { margin-left: calc(4 * var(--u)); }
.tab:hover { background: var(--hover); }
.tab[aria-selected="true"] { background: #202020; border-color: #3a3a3a; }

.search {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  height: 100%;
  display: flex;
  align-items: center;
  gap: calc(8 * var(--u));
  background: #080808;
  border: 1px solid var(--line);
  padding: 0 calc(6 * var(--u)) 0 calc(10 * var(--u));
}

.search-ico { flex: none; display: grid; place-items: center; width: calc(12 * var(--u)); height: calc(12 * var(--u)); }
.search-ico svg { width: 100%; height: 100%; stroke: #666; }

.search-input {
  flex: 1 1 auto;
  min-width: 0;
  height: 100%;
  background: none;
  border: 0;
  outline: none;
  font-family: var(--ui);
  font-size: calc(11 * var(--u));
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #d6d6d6;
}
.search-input::placeholder { color: #5f5f5f; }
.search-input::-webkit-search-cancel-button { display: none; }

.search-clear, .search-filter {
  flex: none;
  width: calc(20 * var(--u));
  height: calc(20 * var(--u));
  display: grid;
  place-items: center;
}
.search-clear svg { width: calc(9 * var(--u)); height: calc(9 * var(--u)); stroke: #7a7a7a; }
.search-clear:hover svg { stroke: #fff; }
.search-filter { background: #242424; }
.search-filter svg { width: calc(12 * var(--u)); height: calc(12 * var(--u)); stroke: #b4b4b4; }
.search-filter:hover { background: #2e2e2e; }
.search-filter[disabled] { cursor: default; opacity: 0.35; }
.search-filter[disabled]:hover { background: #242424; }

.drop {
  position: absolute;
  top: calc(100% + 3 * var(--u));
  left: -1px;
  right: -1px;
  z-index: 40;
  max-height: calc(300 * var(--u));
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--line-strong);
}

.compare {
  flex: none;
  height: 100%;
  display: flex;
  align-items: center;
  gap: calc(7 * var(--u));
  padding: 0 calc(12 * var(--u));
  border: 1px solid var(--line-strong);
  background: var(--panel);
  color: #8a8a8a;
  font-family: var(--ui);
  font-size: calc(11 * var(--u));
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: default;
}
.compare-ico { display: grid; place-items: center; width: calc(12 * var(--u)); height: calc(12 * var(--u)); }
.compare-ico svg { width: 100%; height: 100%; stroke: #8a8a8a; }

.workspace {
  position: absolute;
  left: var(--frame-x);
  right: var(--frame-x);
  top: calc(var(--frame-y) + var(--topbar-h) + 1px);
  bottom: var(--frame-y);
  display: grid;
  grid-template-columns: var(--col-menu) var(--col-article) var(--col-toc);
  justify-content: start;
  column-gap: calc(28 * var(--u));
  padding: calc(30 * var(--u)) calc(32 * var(--u)) 0 calc(29 * var(--u));
  overflow: hidden;
}

.menu {
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: var(--bar);
  min-width: 0;
}

.grp + .grp { margin-top: calc(15 * var(--u)); }

.grp-head {
  position: relative;
  display: flex;
  align-items: flex-end;
  height: calc(40 * var(--u));
  padding: 0 calc(9 * var(--u)) calc(6 * var(--u)) calc(11 * var(--u));
  background: var(--panel);
  border: 1px solid var(--line-strong);
  color: #8a8a8a;
  font-family: var(--ui);
  font-size: calc(13 * var(--u));
  font-weight: 400;
  overflow: hidden;
  transition: border-color 120ms var(--ease), color 120ms var(--ease);
}
.grp-head::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  top: 0;
  width: 58%;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='48' height='26' viewBox='0 0 48 26'><g stroke='%233f3f3f' fill='none'><path d='M2 25 L14 1' stroke-width='1'/><path d='M13 25 L25 1' stroke-width='1.4'/><path d='M25 25 L37 1' stroke-width='1.9'/><path d='M37 25 L45 9' stroke-width='2.3'/></g></svg>");
  background-repeat: repeat-x;
  background-position: right bottom;
}
.grp-head:hover { border-color: #454545; color: #cfcfcf; }

.grp-label {
  position: relative;
  z-index: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: calc(12 * var(--u));
}

.caret {
  position: absolute;
  right: calc(7 * var(--u));
  bottom: calc(6 * var(--u));
  z-index: 2;
  width: calc(8 * var(--u));
  height: calc(8 * var(--u));
  fill: #6a6a6a;
  transition: transform var(--dur) var(--ease);
}
.grp[open] > .grp-head .caret { transform: rotate(180deg); }

.grp[open] > .grp-head {
  background: linear-gradient(180deg, var(--silver-1) 0%, var(--silver-2) 100%);
  color: var(--ink);
  border-color: var(--silver-2);
}
.grp[open] > .grp-head:hover { border-color: var(--silver-1); color: var(--ink); }
.grp[open] > .grp-head::after {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='48' height='26' viewBox='0 0 48 26'><g stroke='%238f8f8f' fill='none'><path d='M2 25 L14 1' stroke-width='1'/><path d='M13 25 L25 1' stroke-width='1.4'/><path d='M25 25 L37 1' stroke-width='1.9'/><path d='M37 25 L45 9' stroke-width='2.3'/></g></svg>");
}
.grp[open] > .grp-head .caret { fill: #3a3a3a; }

.grp-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur) var(--ease);
}
.grp[open] > .grp-body { grid-template-rows: 1fr; }
.grp-body > div { overflow: hidden; min-height: 0; }
.grp:not([open]) > .grp-body { pointer-events: none; }
.grp:not([open]) > .grp-body > div {
  visibility: hidden;
  transition: visibility 0s linear var(--dur);
}
.grp[open] > .grp-body > div {
  visibility: visible;
  transition: visibility 0s;
}
.grp-list { padding: calc(3 * var(--u)) 0 calc(4 * var(--u)); display: flex; flex-direction: column; gap: calc(4 * var(--u)); }

.item, .sub-head {
  position: relative;
  display: flex;
  align-items: center;
  height: calc(33 * var(--u));
  padding: 0 calc(26 * var(--u)) 0 calc(11 * var(--u));
  background: var(--panel);
  border: 1px solid var(--line-strong);
  color: var(--text-menu);
  font-family: var(--ui);
  font-size: calc(13 * var(--u));
  text-align: left;
  transition: background 120ms var(--ease), border-color 120ms var(--ease), color 120ms var(--ease);
}
.item:hover, .sub-head:hover { background: var(--hover); }
.item > span, .sub-head > span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.item.is-active {
  background: var(--select);
  border-color: var(--line-bright);
  color: #fff;
}
.item.is-hit { border-color: #5a5a5a; }
.item.is-dim { opacity: 0.32; }

.sub-head { background: var(--panel); }
.sub-head .caret { position: static; margin-left: auto; flex: none; transform: rotate(-90deg); }
.sub-head[aria-expanded="true"] .caret { transform: rotate(0deg); }

.sub-body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--dur) var(--ease); }
.sub[open] > .sub-body { grid-template-rows: 1fr; }
.sub-body > div { overflow: hidden; min-height: 0; }
.sub[open] > .sub-head { background: #2a2a2a; }
.sub-list { padding: calc(3 * var(--u)) 0; display: flex; flex-direction: column; gap: calc(4 * var(--u)); }

.article {
  position: relative;
  min-width: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: var(--bar);
  scroll-behavior: smooth;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: calc(4 * var(--u));
  margin-bottom: calc(14 * var(--u));
}
.chip {
  padding: calc(2 * var(--u)) calc(6 * var(--u));
  border: 1px solid var(--line-bright);
  color: #cfcfcf;
  font-family: var(--ui);
  font-size: calc(10 * var(--u));
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background 120ms var(--ease), color 120ms var(--ease);
}
.chip:hover { background: var(--hover); color: #fff; }
.chip.is-on { background: #2f2f2f; color: #fff; }

.eyebrow {
  font-family: var(--ui);
  font-size: calc(12.5 * var(--u));
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #9a9a9a;
  margin-bottom: calc(6 * var(--u));
}

.hazard {
  display: block;
  width: 100%;
  height: calc(5 * var(--u));
  background: repeating-linear-gradient(112deg,
    #4a4a4a 0 calc(12 * var(--u)),
    transparent calc(12 * var(--u)) calc(18 * var(--u)));
}
.hazard--thin { height: calc(3 * var(--u)); }
.hazard--solid {
  background: repeating-linear-gradient(112deg,
    #4a4a4a 0 calc(12 * var(--u)),
    transparent calc(12 * var(--u)) calc(18 * var(--u)));
}
.hazard-wrap { display: block; margin: calc(8 * var(--u)) 0 calc(20 * var(--u)); }

.article h1.h1 {
  margin: 0;
  font-family: var(--ui);
  font-size: calc(26 * var(--u));
  font-weight: 400;
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: var(--text-bright);
}
.article h2.h2 {
  margin: calc(26 * var(--u)) 0 calc(8 * var(--u));
  font-family: var(--ui);
  font-size: calc(17.5 * var(--u));
  font-weight: 400;
  line-height: 1.25;
  color: #f0f0f0;
}
.article h3.h3 {
  margin: calc(18 * var(--u)) 0 calc(6 * var(--u));
  font-family: var(--ui);
  font-size: calc(14.5 * var(--u));
  font-weight: 400;
  line-height: 1.3;
  color: #dcdcdc;
}
.article h1, .article h2, .article h3 { scroll-margin-top: calc(12 * var(--u)); }

.article p {
  margin: 0 0 calc(26 * var(--u));
  font-size: calc(12.5 * var(--u));
  line-height: 1.55;
  color: var(--text);
}
.article strong { color: var(--text-bright); font-weight: 400; }

.article .blist {
  margin: 0 0 calc(26 * var(--u));
  padding-left: calc(14 * var(--u));
  list-style: none;
}
.article .blist li {
  position: relative;
  margin-bottom: calc(8 * var(--u));
  font-size: calc(12.5 * var(--u));
  line-height: 1.55;
  color: var(--text);
}
.article .blist li::before {
  content: "\00b7";
  position: absolute;
  left: calc(-10 * var(--u));
  color: #5a5a5a;
  font-size: calc(14 * var(--u));
  line-height: 1;
}
.article .blist ol { list-style: decimal; padding-left: calc(18 * var(--u)); }
.article .blist ol li::before { content: none; }
.article .blist ol li::marker { color: #7a7a7a; }

.article code {
  padding: calc(1 * var(--u)) calc(4 * var(--u));
  background: #161616;
  border: 1px solid #2a2a2a;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: calc(11.5 * var(--u));
  color: #cfcfcf;
}

.note {
  display: flex;
  gap: calc(10 * var(--u));
  margin: 0 0 calc(26 * var(--u));
  padding: calc(12 * var(--u)) calc(14 * var(--u));
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
}
.note-icon {
  flex: none;
  width: calc(10 * var(--u));
  height: calc(10 * var(--u));
  margin-top: calc(2 * var(--u));
  border-radius: 50%;
  background: var(--warn-icon);
  position: relative;
}
.note-icon::after {
  content: "!";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #2a1e0b;
  font-family: var(--ui);
  font-size: calc(8 * var(--u));
  font-weight: 700;
  line-height: 1;
}
.note-body { min-width: 0; flex: 1 1 auto; }
.note-body p {
  margin: 0 0 calc(8 * var(--u));
  font-size: calc(12 * var(--u));
  line-height: 1.5;
  color: #e8e0d0;
}
.note-body p:last-child { margin-bottom: 0; }
.note-body .blist { margin-bottom: calc(8 * var(--u)); }
.note-body .blist li { font-size: calc(12 * var(--u)); color: #e8e0d0; }

.fig { margin: 0 0 calc(26 * var(--u)); }
.fig .figure, .fig-row img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid #2a2a2a;
  cursor: zoom-in;
}
.fig-row {
  display: flex;
  align-items: center;
  gap: calc(10 * var(--u));
  margin: 0 0 calc(16 * var(--u));
}
.fig-row img { flex: none; max-height: calc(64 * var(--u)); width: auto; }
.fig-row figcaption { min-width: 0; font-size: calc(12 * var(--u)); line-height: 1.45; color: var(--text); }
.fig-row .ico { flex: none; }

.img-missing {
  display: grid;
  place-items: center;
  min-width: calc(90 * var(--u));
  min-height: calc(40 * var(--u));
  padding: calc(8 * var(--u));
  border: 1px dashed #2a2a2a;
  color: #4a4a4a;
  font-family: ui-monospace, Consolas, monospace;
  font-size: calc(10 * var(--u));
}

.ico {
  display: inline-grid;
  place-items: center;
  width: calc(13 * var(--u));
  height: calc(13 * var(--u));
  margin-right: calc(5 * var(--u));
  border: 1px solid #333;
  vertical-align: calc(-2 * var(--u));
}

.iref {
  display: inline-block;
  padding: 0 calc(3 * var(--u));
  border: 1px solid #2f2f2f;
  color: #d8d8d8;
  font-family: var(--ui);
  font-size: calc(10.5 * var(--u));
  letter-spacing: 0.02em;
  vertical-align: calc(1 * var(--u));
}
.iref.is-linked { color: #fff; }
.xlink { color: var(--text-dim); }

.item-row, .gallery {
  display: grid;
  gap: calc(4 * var(--u));
  margin: 0 0 calc(26 * var(--u));
}
.item-row { grid-template-columns: repeat(auto-fill, minmax(calc(58 * var(--u)), 1fr)); }
.gallery { grid-template-columns: repeat(auto-fill, minmax(calc(240 * var(--u)), 1fr)); }
.gallery-cell { margin: 0; }
.irow-cell {
  display: grid;
  place-items: center;
  min-height: calc(26 * var(--u));
  padding: calc(4 * var(--u)) calc(6 * var(--u));
  background: var(--panel);
  border: 1px solid var(--line-strong);
  color: #8f8f8f;
  font-family: var(--ui);
  font-size: calc(10.5 * var(--u));
  text-align: center;
}
.irow-cell.is-linked { color: #fff; }

.carousel { display: flex; gap: calc(8 * var(--u)); overflow-x: auto; margin: 0 0 calc(26 * var(--u)); }
.carousel img { flex: none; max-height: calc(160 * var(--u)); border: 1px solid #2a2a2a; }

.table-wrap { overflow-x: auto; margin: 0 0 calc(26 * var(--u)); }
.dtable { width: 100%; border-collapse: collapse; border: 1px solid #2a2a2a; }
.dtable th, .dtable td {
  padding: calc(6 * var(--u)) calc(9 * var(--u));
  border: 1px solid #2a2a2a;
  font-size: calc(12 * var(--u));
  line-height: 1.45;
}
.dtable th {
  background: #141414;
  color: var(--text-bright);
  font-family: var(--ui);
  font-size: calc(11 * var(--u));
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.dtable td { color: var(--text); }
.dtable tbody tr:hover { background: #101010; }

.toc {
  overflow-y: auto;
  overflow-x: hidden;
  min-width: 0;
  padding-right: var(--bar);
}
.toc-title {
  margin-bottom: calc(22 * var(--u));
  color: #fff;
  font-family: var(--ui);
  font-size: calc(13 * var(--u));
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.toc-list { list-style: none; margin: 0; padding: 0; position: relative; }
.toc-list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: #2a2a2a;
}
.toc-item { position: relative; }
.toc-link {
  position: relative;
  display: block;
  width: 100%;
  min-height: calc(31 * var(--u));
  padding: calc(6 * var(--u)) 0 calc(6 * var(--u)) calc(16 * var(--u));
  color: var(--text-dim);
  font-family: var(--ui);
  font-size: calc(13 * var(--u));
  line-height: 1.3;
  text-align: left;
  transition: color 120ms var(--ease), background 120ms var(--ease);
}
.toc-link:hover { color: #cfcfcf; text-decoration: none; }
.toc-link > span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.toc-item[data-level="3"] .toc-link { padding-left: calc(26 * var(--u)); font-size: calc(12 * var(--u)); }
.toc-item.is-active .toc-link { color: #fff; background: #151515; }
.toc-item.is-active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #fff;
}

.empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: calc(30 * var(--u));
}
.empty-inner { width: calc(475 * var(--u)); }
.empty-top { display: flex; align-items: center; gap: calc(12 * var(--u)); margin-bottom: calc(12 * var(--u)); }
.empty-top .hazard { flex: 1 1 0; }
.empty-label {
  flex: none;
  color: #fff;
  font-family: var(--ui);
  font-size: calc(12 * var(--u));
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}
.empty-box {
  display: grid;
  place-items: center;
  height: calc(100 * var(--u));
  background: #161616;
  color: #fff;
  font-family: var(--ui);
  font-size: calc(26 * var(--u));
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.empty-bottom { margin-top: calc(12 * var(--u)); }

.drop-item {
  display: block;
  width: 100%;
  padding: calc(8 * var(--u)) calc(12 * var(--u));
  border-bottom: 1px solid var(--line);
  text-align: left;
  transition: background 120ms var(--ease);
}
.drop-item:last-child { border-bottom: 0; }
.drop-item:hover, .drop-item.is-cursor { background: var(--select); }
.drop-item small {
  display: block;
  color: var(--text-dim);
  font-family: var(--ui);
  font-size: calc(10 * var(--u));
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.drop-item span { color: var(--text-menu); font-size: calc(12.5 * var(--u)); }
.drop-item mark { background: none; color: #fff; }
.drop-empty { padding: calc(10 * var(--u)) calc(12 * var(--u)); color: var(--text-dim); font-size: calc(12 * var(--u)); }
.drop-tags { display: flex; flex-wrap: wrap; gap: calc(4 * var(--u)); padding: calc(8 * var(--u)) calc(12 * var(--u)); }
.drop-tag {
  padding: calc(2 * var(--u)) calc(6 * var(--u));
  border: 1px solid var(--line-strong);
  color: #9a9a9a;
  font-family: var(--ui);
  font-size: calc(10 * var(--u));
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.drop-tag:hover { color: #fff; border-color: var(--line-bright); }
.drop-tag.is-on { background: #2f2f2f; color: #fff; border-color: var(--line-bright); }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: calc(30 * var(--u));
  background: rgba(0, 0, 0, 0.92);
}
.lightbox[hidden] { display: none; }
.lightbox-img { max-width: 100%; max-height: 100%; object-fit: contain; }
.lightbox-close {
  position: absolute;
  top: calc(24 * var(--u));
  right: calc(28 * var(--u));
  width: calc(28 * var(--u));
  height: calc(28 * var(--u));
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
}
.lightbox-close svg { width: calc(12 * var(--u)); height: calc(12 * var(--u)); stroke: #cfcfcf; }
.lightbox-close:hover { border-color: var(--line-bright); }

@media (max-width: 1100px) {
  .workspace { grid-template-columns: var(--col-menu) minmax(0, 1fr); }
  .toc { display: none; }
}

@media (max-width: 800px) {
  :root { --topbar-px: calc(16 * var(--u)); }
  .topbar { flex-wrap: wrap; height: auto; padding: calc(6 * var(--u)) var(--topbar-px); gap: calc(8 * var(--u)); }
  .menu-btn { display: grid; }
  .search { order: 3; flex: 1 0 100%; height: calc(28 * var(--u)); }
  .compare { display: none; }
  .workspace {
    grid-template-columns: minmax(0, 1fr);
    padding-left: calc(16 * var(--u));
    padding-right: calc(16 * var(--u));
  }
  .menu {
    position: fixed;
    z-index: 60;
    top: 0;
    bottom: 0;
    left: 0;
    width: calc(260 * var(--u));
    padding: calc(20 * var(--u)) calc(14 * var(--u));
    background: #0a0a0a;
    border-right: 1px solid var(--line-strong);
    transform: translateX(-100%);
    transition: transform var(--dur) var(--ease);
    margin-right: 0;
  }
  .menu.is-open { transform: none; }
}