/* ai.draconitic.com. True black, hairlines instead of raised surfaces, one memorable thing: the corpus field.
   Written for this site only; it does not carry the workspace system the other Draconitic apps share. */
@font-face { font-family: "Geist"; src: url("fonts/geist-wght-normal.woff2") format("woff2"); font-weight: 100 900; font-style: normal; font-display: swap; }
@font-face { font-family: "Geist Mono"; src: url("fonts/geist-mono-wght-normal.woff2") format("woff2"); font-weight: 100 900; font-style: normal; font-display: swap; }

:root, [data-site="ai"] {
  color-scheme: dark;
  --void: #000000;
  --bone: #f5f5f7;
  --ash: #a9a9b4;
  --smoke: #80808c;
  --hair: #1b1b20;
  --hair-2: #2d2d34;
  --glass: rgb(0 0 0 / 0.62);
  --ion: #b6bffe;
  --ion-line: rgb(182 191 254 / 0.42);
  --ion-wash: rgb(182 191 254 / 0.08);
  --danger: #ff8f88;
  --warn: #e8c36f;
  --sans: "Geist", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "Geist Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --pad: clamp(18px, 3.4vw, 56px);
  --max: 1400px;
  --bar: 58px;
}
/* A section's own light, used for its tick, its cluster in the field and its heading rule. */
.sec-explore, .section-explore { --sec: #d6dbeb; }
.sec-companies, .section-companies { --sec: #9eb7ff; }
.sec-products, .section-products { --sec: #8adbff; }
.sec-models, .section-models { --sec: #c7a8ff; }
.sec-benchmarks, .section-benchmarks { --sec: #8fedfa; }
.sec-concepts, .section-concepts { --sec: #b5bfff; }
.sec-mathematics, .section-mathematics { --sec: #ebebff; }
.sec-research, .section-research { --sec: #f2a6e0; }
.sec-history, .section-history { --sec: #ffcc99; }
.sec-trends-horizons, .section-trends-horizons { --sec: #ffa8c4; }

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--void); -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--bar) + 12px); }
body { display: flex; min-height: 100vh; flex-direction: column; margin: 0; background: var(--void); color: var(--bone); font: 400 15px/1.55 var(--sans); font-feature-settings: "ss01", "cv11"; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
main { flex: 1 0 auto; width: 100%; }
body:not(.page-home) main { max-width: var(--max); margin-inline: auto; padding: 0 var(--pad) 72px; }
h1, h2, h3, h4 { margin: 0; font-weight: 400; line-height: 1.15; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
a:hover { color: #fff; }
small { font-size: 0.86em; }
code, kbd, pre, samp { font-family: var(--mono); font-size: 0.92em; }
img, svg, canvas { max-width: 100%; }
hr { height: 1px; border: 0; background: var(--hair); }
[hidden] { display: none !important; }
:focus-visible { outline: 1.5px solid var(--ion); outline-offset: 3px; border-radius: 1px; }
::selection { color: #000; background: var(--ion); }
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: #000; }
::-webkit-scrollbar-thumb { border: 2px solid #000; border-radius: 8px; background: #26262c; }
::-webkit-scrollbar-thumb:hover { background: #3a3a42; }
.ai-sr, .fg-sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.ai-skip { position: absolute; top: 8px; left: 8px; z-index: 100; padding: 8px 12px; color: #000; background: #fff; transform: translateY(-200%); }
.ai-skip:focus { transform: none; }
.muted { color: var(--smoke); }

/* ------------------------------------------------------------------ bar */
.ai-bar { position: sticky; top: 0; z-index: 40; display: flex; height: var(--bar); align-items: center; gap: clamp(16px, 2.4vw, 36px); padding: 0 var(--pad); border-bottom: 1px solid transparent; background: var(--glass); -webkit-backdrop-filter: blur(22px) saturate(140%); backdrop-filter: blur(22px) saturate(140%); transition: border-color 240ms var(--ease), background-color 240ms var(--ease); view-transition-name: ai-bar; }
.is-scrolled .ai-bar { border-bottom-color: var(--hair); }
.page-home .ai-bar { position: fixed; right: 0; left: 0; background: transparent; -webkit-backdrop-filter: none; backdrop-filter: none; }
.is-scrolled .page-home .ai-bar { background: var(--glass); -webkit-backdrop-filter: blur(22px) saturate(140%); backdrop-filter: blur(22px) saturate(140%); }
.ai-brand { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 11px; }
.ai-mark { display: inline-block; width: 38px; height: 22px; flex: 0 0 38px; background: var(--bone); -webkit-mask: url("draconitic-mark-small.svg") center / contain no-repeat; mask: url("draconitic-mark-small.svg") center / contain no-repeat; transition: background-color 200ms var(--ease), filter 200ms var(--ease); }
.ai-brand:hover .ai-mark { background: var(--ion); filter: drop-shadow(0 0 8px var(--ion-line)); }
.ai-word { font-size: 15px; font-weight: 500; letter-spacing: -0.012em; white-space: nowrap; }
.ai-word-sub { color: var(--ash); font-weight: 300; }
.ai-nav { display: flex; min-width: 0; flex: 1 1 auto; align-items: center; gap: clamp(4px, 1.4vw, 22px); overflow-x: auto; scrollbar-width: none; }
.ai-nav::-webkit-scrollbar { display: none; }
.ai-nav a { position: relative; padding: 6px 2px; color: var(--ash); font-size: 13.5px; white-space: nowrap; transition: color 140ms var(--ease); }
.ai-nav a:hover { color: var(--bone); }
.ai-nav a[aria-current] { color: var(--bone); }
.ai-nav a[aria-current]::after { position: absolute; right: 2px; bottom: 0; left: 2px; height: 1px; background: var(--bone); content: ""; }
.ai-tools { display: flex; flex: 0 0 auto; align-items: center; gap: 14px; margin-left: auto; }
.ai-cmd { display: inline-flex; height: 32px; min-width: 188px; align-items: center; gap: 9px; padding: 0 7px 0 10px; border: 1px solid var(--hair-2); border-radius: 2px; color: var(--ash); background: rgb(0 0 0 / 0.4); font: 400 13px var(--sans); cursor: pointer; transition: border-color 140ms var(--ease), color 140ms var(--ease); }
.ai-cmd:hover { border-color: #55555f; color: var(--bone); }
.ai-cmd svg { width: 14px; height: 14px; flex: 0 0 14px; }
.ai-cmd span { flex: 1 1 auto; text-align: left; }
.ai-cmd kbd, .cmd kbd { padding: 1px 5px; border: 1px solid var(--hair-2); border-radius: 2px; color: var(--smoke); font: 400 11px var(--mono); }
.ai-tool-link { color: var(--ash); font-size: 13.5px; white-space: nowrap; }
.ai-menu-toggle { display: inline-grid; width: 32px; height: 32px; align-content: center; justify-items: center; gap: 5px; padding: 0; border: 1px solid var(--hair-2); border-radius: 2px; background: rgb(0 0 0 / 0.4); cursor: pointer; }
.ai-menu-toggle:hover { border-color: #55555f; }
.ai-menu-toggle span { display: block; width: 13px; height: 1px; background: var(--bone); }
.ai-sheet { position: fixed; inset: var(--bar) 0 auto auto; width: min(760px, 100vw); max-height: calc(100dvh - var(--bar)); margin: 0; padding: 22px var(--pad) 28px; overflow: auto; border: 0; border-bottom: 1px solid var(--hair-2); border-left: 1px solid var(--hair-2); color: var(--bone); background: rgb(0 0 0 / 0.88); -webkit-backdrop-filter: blur(28px); backdrop-filter: blur(28px); transition: opacity 180ms var(--ease), translate 220ms var(--ease), overlay 220ms allow-discrete, display 220ms allow-discrete; opacity: 0; translate: 0 -6px; }
.ai-sheet:popover-open { opacity: 1; translate: 0; }
@starting-style { .ai-sheet:popover-open { opacity: 0; translate: 0 -6px; } }
.ai-sheet::backdrop { background: transparent; }
.ai-sheet-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px 28px; }
.ai-sheet-grid > div { display: grid; align-content: start; gap: 1px; }
.nav-group-title { margin-bottom: 6px; color: var(--smoke); font-size: 12.5px; }
.ai-sheet-grid a { padding: 4px 0; color: var(--bone); font-size: 15px; }
.ai-sheet-grid a:hover { color: var(--ion); }
.ai-sheet-grid a[aria-current] { color: var(--ion); }

/* ---------------------------------------------------------------- palette */
.cmd { width: min(660px, calc(100vw - 24px)); max-height: min(560px, calc(100dvh - 40px)); margin: 13vh auto auto; padding: 0; overflow: hidden; border: 1px solid var(--hair-2); border-radius: 3px; color: var(--bone); background: rgb(4 4 6 / 0.9); -webkit-backdrop-filter: blur(30px) saturate(150%); backdrop-filter: blur(30px) saturate(150%); box-shadow: 0 0 0 1px rgb(255 255 255 / 0.02), 0 30px 90px -18px rgb(182 191 254 / 0.22); }
.cmd[open] { display: grid; grid-template-rows: auto minmax(0, 1fr); animation: cmd-in 180ms var(--ease); }
.cmd::backdrop { background: rgb(0 0 0 / 0.66); animation: cmd-fade 180ms var(--ease); }
@keyframes cmd-in { from { opacity: 0; transform: translateY(-8px) scale(0.985); } }
@keyframes cmd-fade { from { opacity: 0; } }
.cmd-field { display: flex; align-items: center; gap: 12px; padding: 0 14px; border-bottom: 1px solid var(--hair); }
.cmd-field svg { width: 17px; height: 17px; flex: 0 0 17px; color: var(--ion); }
.cmd-field input { width: 100%; min-width: 0; height: 58px; border: 0; outline: 0; color: var(--bone); background: transparent; font: 300 19px var(--sans); }
.cmd-field input::placeholder { color: var(--smoke); }
.cmd-field input::-webkit-search-cancel-button { display: none; }
.cmd-list, .seek-list { margin: 0; padding: 6px; overflow: auto; list-style: none; overscroll-behavior: contain; }
.cmd-list a, .seek-list a { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; padding: 9px 10px; border-radius: 2px; }
.cmd-list small, .seek-list small { flex: 0 0 auto; color: var(--smoke); font-size: 12px; }
.cmd-list span, .seek-list span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cmd-list a:hover, .seek-list a:hover, [aria-selected="true"] > a { background: var(--ion-wash); }
[aria-selected="true"] > a { box-shadow: inset 1px 0 0 var(--ion); }

/* ------------------------------------------------------------- home: field */
.field-hero { position: relative; isolation: isolate; display: grid; align-items: end; min-height: 100svh; overflow: hidden; background: #000; }
.field-hero.no-webgl { background: radial-gradient(60% 70% at 72% 40%, rgb(182 191 254 / 0.14), transparent 70%), #000; }
.field-canvas { position: absolute; z-index: -1; inset: 0; width: 100%; height: 100%; opacity: 0; transition: opacity 1200ms var(--ease); }
.field-canvas.is-live { opacity: 1; }
.field-labels { position: absolute; z-index: 1; inset: 0; overflow: hidden; pointer-events: none; }
.field-label { position: absolute; top: 0; left: 0; padding: 0 0 0 10px; color: var(--bone); font-size: 12.5px; line-height: 1; white-space: nowrap; text-shadow: 0 0 10px #000, 0 0 3px #000; will-change: transform; }
.field-label::before { position: absolute; top: 50%; left: 0; width: 7px; height: 1px; background: var(--ion); content: ""; }
.field-label.is-hover { font-size: 14px; }
.field-copy { position: relative; z-index: 2; width: 100%; max-width: 1760px; margin: 0 auto; padding: 120px var(--pad) clamp(40px, 8vh, 84px); pointer-events: none; animation: rise 1100ms var(--ease) 200ms both; }
.field-copy > * { pointer-events: auto; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); filter: blur(6px); } }
.field-title { width: fit-content; margin: 0 0 clamp(20px, 3.4vh, 36px) -0.045em; font-size: clamp(58px, 11.6vw, 212px); font-weight: 200; line-height: 0.92; letter-spacing: -0.062em; color: transparent; background: linear-gradient(176deg, #fff 22%, #c6c8d4 58%, #6d6f80 100%); -webkit-background-clip: text; background-clip: text; pointer-events: none; }
.seek { position: relative; display: flex; width: min(640px, 100%); align-items: center; border: 1px solid var(--hair-2); border-radius: 2px; background: rgb(0 0 0 / 0.66); -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px); transition: border-color 180ms var(--ease), box-shadow 240ms var(--ease); }
.seek:focus-within { border-color: var(--ion-line); box-shadow: 0 0 44px -14px var(--ion); }
.seek input { width: 100%; min-width: 0; height: 56px; padding: 0 16px; border: 0; outline: 0; color: var(--bone); background: transparent; font: 300 clamp(16px, 1vw + 8px, 20px) var(--sans); }
.seek input::placeholder { color: var(--smoke); }
.seek input::-webkit-search-cancel-button { display: none; }
.seek-go { display: grid; width: 56px; height: 56px; flex: 0 0 56px; place-items: center; border: 0; border-left: 1px solid var(--hair); color: var(--ash); background: transparent; cursor: pointer; }
.seek-go:hover { color: #fff; background: var(--ion-wash); }
.seek-go svg { width: 18px; height: 18px; }
.seek-list { position: absolute; right: -1px; bottom: calc(100% + 8px); left: -1px; max-height: 44vh; border: 1px solid var(--hair-2); border-radius: 2px; background: rgb(3 3 5 / 0.98); }

/* ------------------------------------------------------------- home: bands */
.ledger, .paths-band, .systems, .wire { width: 100%; max-width: var(--max); margin: 0 auto; padding-inline: var(--pad); }
.ledger { display: grid; grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.6fr); gap: clamp(28px, 6vw, 96px); padding-block: clamp(70px, 11vh, 130px); border-top: 1px solid var(--hair); }
.ledger-side { position: sticky; top: calc(var(--bar) + 26px); align-self: start; }
.ledger-side h2, .band-head h2, .system h2 { font-size: clamp(30px, 2.6vw + 8px, 50px); font-weight: 250; letter-spacing: -0.038em; }
.ledger-side p { max-width: 38ch; margin: 18px 0 0; color: var(--ash); font-size: 16.5px; line-height: 1.5; }
.ledger-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.ledger-rows { margin: 0; padding: 0; border-bottom: 1px solid var(--hair); list-style: none; }
.ledger-rows li { border-top: 1px solid var(--hair); }
.ledger-rows a { position: relative; display: grid; grid-template-columns: 18px minmax(0, 1fr) auto; align-items: baseline; gap: 10px; padding: clamp(14px, 2vh, 20px) 4px; overflow: hidden; transition: padding-left 300ms var(--ease); }
.ledger-rows a::before { position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, color-mix(in srgb, var(--sec) 13%, transparent), transparent 62%); opacity: 0; content: ""; transition: opacity 240ms var(--ease); }
.ledger-rows a:hover { padding-left: 14px; }
.ledger-rows a:hover::before { opacity: 1; }
.ledger-rows i { width: 6px; height: 6px; align-self: center; border-radius: 50%; background: var(--sec); box-shadow: 0 0 12px var(--sec); }
.ledger-rows span { font-size: clamp(20px, 1.2vw + 12px, 30px); font-weight: 300; letter-spacing: -0.025em; }
.ledger-rows b { color: var(--smoke); font: 400 13px var(--mono); }
.band-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 20px; margin-bottom: 30px; }
.band-head a { color: var(--ash); font-size: 14px; }
.paths-band { padding-block: 0 clamp(70px, 11vh, 130px); }
.path-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0; padding: 0; border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); list-style: none; }
.path-row li + li { border-left: 1px solid var(--hair); }
.path-row a { display: grid; height: 100%; grid-template-rows: auto auto 1fr auto; gap: 12px; padding: 22px clamp(14px, 1.6vw, 26px) 20px; transition: background-color 240ms var(--ease); }
.path-row a:hover { background: var(--ion-wash); }
.path-kind, .path-steps-count { color: var(--smoke); font-size: 13px; }
.path-row strong { font-size: 22px; font-weight: 300; line-height: 1.2; letter-spacing: -0.02em; }
.path-summary { color: var(--ash); font-size: 14.5px; line-height: 1.5; }
.systems { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; padding-block: 0 clamp(70px, 11vh, 130px); }
.system { display: flex; flex-direction: column; align-items: flex-start; gap: 18px; padding: clamp(20px, 3vw, 44px); border: 1px solid var(--hair); }
.system + .system { border-left: 0; }
.system p { max-width: 46ch; margin: 0; color: var(--ash); font-size: 15.5px; }
.system-code { width: 100%; margin: auto 0 0; padding: 16px 18px; overflow: auto; border: 1px solid var(--hair); color: #cfd3ff; background: #000; font-size: 12.5px; line-height: 1.6; }
.system-route { display: grid; width: 100%; margin: auto 0 0; padding: 0; border: 1px solid var(--hair); list-style: none; }
.system-route li { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; padding: 9px 14px; font-size: 14px; }
.system-route li + li { border-top: 1px solid var(--hair); }
.system-route small { flex: 0 0 auto; order: 2; color: var(--smoke); font-size: 12px; }
.system-route .is-chosen { color: #fff; background: linear-gradient(90deg, var(--ion-wash), transparent); box-shadow: inset 1px 0 0 var(--ion); }
.wire { padding-block: 0 clamp(70px, 11vh, 120px); }
.wire ol { margin: 0; padding: 0; border-top: 1px solid var(--hair); list-style: none; }
.wire li { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 2px 24px; padding: 12px 0; border-bottom: 1px solid var(--hair); }
.wire a { min-width: 0; font-size: 15px; }
.wire a:hover { color: var(--ion); }
.wire span { color: var(--smoke); font-size: 12.5px; }

/* ----------------------------------------------------------- footer */
.ai-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 30px; padding: 26px var(--pad) 30px; border-top: 1px solid var(--hair); color: var(--smoke); font-size: 13px; }
.ai-foot-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--bone); font-weight: 500; }
.ai-foot .ai-mark { width: 30px; height: 17px; flex-basis: 30px; }
.ai-foot nav { display: flex; flex-wrap: wrap; gap: 6px 20px; }
.ai-foot a:not(.ai-foot-brand) { color: var(--smoke); }
.ai-foot a:not(.ai-foot-brand):hover { color: var(--bone); }

/* --------------------------------------------------------- page heads */
.fg-pagehead, .doc-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 20px 40px; padding: clamp(40px, 8vh, 84px) 0 clamp(26px, 4vh, 40px); }
.fg-pagehead > div:first-child, .doc-head-inner > div:first-child { min-width: 0; flex: 1 1 520px; }
.fg-pagehead h1, .doc-head h1 { max-width: 20ch; font-size: clamp(36px, 4.4vw + 8px, 82px); font-weight: 220; line-height: 1.02; letter-spacing: -0.05em; text-wrap: balance; }
.fg-pagehead p, .doc-head .lede { max-width: 60ch; margin: 18px 0 0; color: var(--ash); font-size: clamp(16px, 0.4vw + 14px, 19px); line-height: 1.5; text-wrap: pretty; }
.fg-crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-bottom: 18px; color: var(--smoke); font-size: 13px; }
.fg-crumbs a { color: var(--ash); }
.fg-crumbs a:hover { color: #fff; }
.fg-crumbs span[aria-hidden] { color: var(--hair-2); }
.doc-head-inner { display: flex; width: 100%; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 24px 48px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.facts { display: grid; width: min(420px, 100%); margin: 0; border-top: 1px solid var(--hair); }
.facts > div { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.5fr); gap: 14px; padding: 9px 0; border-bottom: 1px solid var(--hair); }
.facts dt { color: var(--smoke); font-size: 13px; }
.facts dd { margin: 0; font-size: 13.5px; }

/* ------------------------------------------------------------- primitives */
.fg-btn { display: inline-flex; min-height: 36px; align-items: center; justify-content: center; gap: 8px; padding: 0 15px; border: 1px solid var(--hair-2); border-radius: 2px; color: var(--bone); background: transparent; font: 400 13.5px var(--sans); cursor: pointer; transition: border-color 140ms var(--ease), background-color 140ms var(--ease), box-shadow 200ms var(--ease); }
.fg-btn:hover { border-color: #5a5a64; color: #fff; }
.fg-btn.primary { border-color: var(--bone); color: #000; background: var(--bone); font-weight: 500; }
.fg-btn.primary:hover { border-color: #fff; color: #000; background: #fff; box-shadow: 0 0 34px -8px var(--ion); }
.fg-btn.quiet { border-color: transparent; color: var(--ash); }
.fg-btn.quiet:hover { color: #fff; background: var(--ion-wash); }
.fg-btn.small { min-height: 28px; padding: 0 10px; font-size: 12.5px; }
.fg-btn.danger { border-color: rgb(255 143 136 / 0.45); color: var(--danger); }
.fg-btn.danger:hover { border-color: var(--danger); background: rgb(255 143 136 / 0.08); }
.fg-btn:disabled { opacity: 0.38; cursor: not-allowed; }
.fg-field { display: grid; min-width: 0; gap: 6px; margin-bottom: 14px; }
.fg-field > span, .fg-label { color: var(--ash); font-size: 13px; }
.fg-input, .fg-select, .fg-textarea { width: 100%; min-width: 0; min-height: 40px; padding: 8px 11px; border: 1px solid var(--hair-2); border-radius: 2px; color: var(--bone); background: #000; font: 400 14.5px var(--sans); transition: border-color 140ms var(--ease), box-shadow 200ms var(--ease); }
.fg-input::placeholder, .fg-textarea::placeholder { color: var(--smoke); }
.fg-input:focus, .fg-select:focus, .fg-textarea:focus { border-color: var(--ion-line); outline: 0; box-shadow: 0 0 26px -10px var(--ion); }
.fg-select { appearance: none; padding-right: 30px; background-image: linear-gradient(45deg, transparent 50%, var(--ash) 50%), linear-gradient(135deg, var(--ash) 50%, transparent 50%); background-position: calc(100% - 15px) 50%, calc(100% - 10px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.fg-textarea { min-height: 96px; line-height: 1.5; resize: vertical; }
.fg-check { display: inline-flex; align-items: center; gap: 9px; margin-bottom: 14px; cursor: pointer; }
.fg-check input { width: 15px; height: 15px; accent-color: var(--ion); }
.fg-form-row { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 10px; }
.fg-form-row .fg-field, .fg-form-row .fg-check { margin-bottom: 0; }
.fg-chip { display: inline-flex; align-items: center; color: var(--smoke); font: 400 12px var(--mono); }
.fg-note { margin: 0 0 14px; padding: 11px 14px; border: 1px solid var(--hair-2); border-left-color: var(--ion); color: var(--ash); font-size: 14px; }
.fg-note.danger { border-left-color: var(--danger); color: var(--danger); }
.fg-empty { display: grid; justify-items: start; gap: 8px; padding: 26px 0; color: var(--ash); }
.fg-empty strong { color: var(--bone); font-weight: 400; }
.fg-sub { margin: 0; color: var(--smoke); font-size: 13px; font-weight: 400; }

/* Sections replace panels: a rule above and open space, nothing raised. */
.fg-panel { min-width: 0; border-top: 1px solid var(--hair); }
.fg-panel.primary { border-top-color: var(--hair-2); }
.fg-panel-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 16px; padding: 14px 0 12px; }
.fg-panel-head h2, .fg-panel-head h3 { color: var(--ash); font-size: 13.5px; font-weight: 400; letter-spacing: 0; }
.fg-panel-head h2 a { color: inherit; }
.fg-panel-head h2 a:hover { color: #fff; }
.fg-panel-body { padding: 0 0 22px; }
.fg-panel-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px; padding: 10px 0 18px; font-size: 13px; }
.fg-panel-foot a { color: var(--ash); }
.fg-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 26px clamp(20px, 3vw, 44px); align-items: start; }
.span-4 { grid-column: span 4; } .span-6 { grid-column: span 6; } .span-8 { grid-column: span 8; } .span-12 { grid-column: 1 / -1; }
.side-stack { display: grid; gap: 22px; }
.fg-kv { display: grid; margin: 0; }
.fg-kv > div { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 2px 16px; padding: 7px 0; border-top: 1px solid var(--hair); }
.fg-kv dt { color: var(--smoke); font-size: 13px; }
.fg-kv dd { margin: 0; font: 400 13px var(--mono); }
.fg-kv dd.text { font-family: var(--sans); }
.fg-metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0; margin: 0; }
.fg-metrics > div { padding: 12px 0; }
.fg-metrics dd { margin: 4px 0 0; font-size: 34px; font-weight: 200; letter-spacing: -0.04em; }
.fg-metrics strong { font-weight: 200; }

/* ------------------------------------------------------------------ tables */
.fg-table-wrap, .benchmark-table-wrap { max-width: 100%; overflow-x: auto; }
.fg-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.fg-table caption { padding: 10px 0; color: var(--smoke); font-size: 12.5px; text-align: left; caption-side: bottom; }
.fg-table th, .fg-table td { padding: 12px 18px 12px 0; border-bottom: 1px solid var(--hair); text-align: left; vertical-align: top; }
.fg-table thead th { padding-block: 8px; border-bottom-color: var(--hair-2); color: var(--smoke); font-size: 12.5px; font-weight: 400; white-space: nowrap; }
.fg-table td { color: var(--ash); }
.fg-table tbody th { font-weight: 400; }
.fg-table td.lead, .fg-table td.lead a { color: var(--bone); font-size: 15px; }
.fg-table td.lead { min-width: 190px; }
.fg-table small { display: block; margin-top: 3px; color: var(--smoke); font-size: 12.5px; }
.fg-table .num { font-family: var(--mono); font-size: 12.5px; text-align: right; white-space: nowrap; }
.fg-table tbody tr { transition: background-color 140ms var(--ease); }
.fg-table tbody tr:hover { background: linear-gradient(90deg, var(--ion-wash), transparent 70%); }
.fg-table a:hover { color: var(--ion); }

/* -------------------------------------------------------------------- lists */
.list-layout { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: clamp(20px, 3.4vw, 56px); align-items: start; }
.rail { position: sticky; top: calc(var(--bar) + 16px); border-top: 0; }
.rail .fg-panel-head { display: none; }
.rail ul { margin: 0; padding: 0; border-left: 1px solid var(--hair); list-style: none; }
.rail a { display: block; margin-left: -1px; padding: 6px 0 6px 13px; border-left: 1px solid transparent; color: var(--ash); font-size: 14px; }
.rail a:hover { color: #fff; }
.rail a[aria-current] { border-left-color: var(--sec, var(--bone)); color: #fff; }
.pairs-tools { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 10px; margin-bottom: 18px; padding-top: 14px; }
.pairs-tools .fg-field { flex: 1 1 240px; margin: 0; }
.pairs-tools p { margin: 0; color: var(--smoke); font-size: 13px; }
.search.compact .fg-input { flex: 1 1 240px; }

/* -------------------------------------------------------------------- entry */
.fg-reading { display: grid; grid-template-columns: 210px minmax(0, 1fr) 280px; gap: clamp(20px, 3.4vw, 56px); align-items: start; }
.fg-toc { position: sticky; top: calc(var(--bar) + 16px); max-height: calc(100vh - var(--bar) - 32px); overflow: auto; border-top: 0; }
.fg-toc .fg-panel-head { padding-top: 0; }
.fg-toc ul { margin: 0; padding: 0; border-left: 1px solid var(--hair); list-style: none; }
.fg-toc a { display: block; margin-left: -1px; padding: 5px 0 5px 13px; border-left: 1px solid transparent; color: var(--ash); font-size: 13.5px; line-height: 1.35; }
.fg-toc a:hover { color: #fff; }
.fg-toc a[aria-current] { border-left-color: var(--sec, var(--bone)); color: #fff; }
.entry-main { min-width: 0; }
.entry-main > .fg-panel:first-child { border-top: 0; }
.entry-main > * + * { margin-top: 44px; }
.entry-head { align-items: flex-end; }
.lede { color: var(--ash); }
.fg-prose, .prose { max-width: 70ch; color: #d8d8df; font-size: 16.5px; line-height: 1.72; }
.fg-prose > :first-child, .prose > :first-child { margin-top: 0; }
.fg-prose h2, .prose h2 { margin: 1.9em 0 0.55em; color: var(--bone); font-size: 25px; font-weight: 300; letter-spacing: -0.024em; }
.fg-prose h3, .prose h3 { margin: 1.5em 0 0.4em; color: var(--bone); font-size: 18px; font-weight: 400; }
.fg-prose ul, .fg-prose ol, .prose ul, .prose ol { margin: 0 0 1em; padding-left: 1.2em; }
.fg-prose li + li, .prose li + li { margin-top: 0.3em; }
.fg-prose a, .prose a { text-decoration: underline; text-decoration-color: var(--ion-line); text-underline-offset: 3px; }
.fg-prose code, .prose code { padding: 1px 5px; border: 1px solid var(--hair); border-radius: 2px; font-size: 0.86em; }
.formula { margin: 0 0 1.4em; padding: 18px 0; overflow-x: auto; border-block: 1px solid var(--hair); }
.claims article { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 4px 12px; padding: 16px 0; border-top: 1px solid var(--hair); }
.claim-no { color: var(--smoke); font: 400 12.5px/1.7 var(--mono); }
.claims p { margin: 0 0 10px; font-size: 15.5px; }
.sources { display: grid; gap: 1px; }
.sources a { display: grid; gap: 1px; padding: 6px 0 6px 12px; border-left: 1px solid var(--hair-2); transition: border-color 140ms var(--ease); }
.sources a:hover { border-left-color: var(--ion); }
.sources strong { font-size: 13.5px; font-weight: 500; }
.sources span { color: var(--ash); font-size: 13.5px; }
.sources small { color: var(--smoke); font-size: 12px; }
.fg-facts { display: grid; gap: 28px; position: sticky; top: calc(var(--bar) + 16px); }
.related-entry-links a { display: grid; gap: 1px; padding: 8px 0; border-top: 1px solid var(--hair); }
.related-entry-links span { color: var(--smoke); font-size: 12.5px; }
.related-entry-links strong { font-weight: 400; }
.citation-panel summary { padding: 14px 0 12px; color: var(--ash); font-size: 13.5px; cursor: pointer; }
.tags { display: flex; flex-wrap: wrap; gap: 5px; }
.tags span { padding: 1px 7px; border: 1px solid var(--hair-2); border-radius: 2px; color: var(--ash); font-size: 12.5px; }
.collection-list { display: grid; gap: 6px; }
.path-context { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 18px; margin-bottom: 26px; padding: 12px 0; border-block: 1px solid var(--hair); }
.path-context span { margin-left: 12px; color: var(--smoke); font-size: 13px; }
.path-context strong { font-weight: 400; }
.path-context-links { display: flex; flex-wrap: wrap; gap: 6px; }

/* ---------------------------------------------------------------- benchmarks */
.benchmark-stats { width: min(320px, 100%); }
.benchmark-stats > div { display: flex; flex-direction: row-reverse; justify-content: flex-end; gap: 12px; }
.benchmark-stats dt { color: var(--bone); font: 400 15px var(--mono); }
.benchmark-stats dd { color: var(--smoke); font: 400 13px var(--sans); }
.benchmark-layout { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: clamp(20px, 3.4vw, 56px); align-items: start; }
.benchmark-side { display: grid; gap: 24px; position: sticky; top: calc(var(--bar) + 16px); max-height: calc(100vh - var(--bar) - 32px); overflow: auto; }
.benchmark-side .fg-toc { position: static; max-height: none; overflow: visible; }
.benchmark-method p { margin: 0; color: var(--smoke); font-size: 13.5px; }
.benchmark-main { min-width: 0; }
.benchmark-record { margin-top: 42px; border-top: 1px solid var(--hair-2); }
.benchmark-heading { padding-top: 16px; }
.benchmark-record h2, .benchmark-heading h2 { color: var(--bone); font-size: 26px; font-weight: 280; letter-spacing: -0.03em; }
.benchmark-record h2 small { color: var(--smoke); font: 400 13px var(--mono); letter-spacing: 0; }
.benchmark-definition { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; margin: 0 0 12px; }
.benchmark-definition > div { padding: 10px 0; border-top: 1px solid var(--hair); }
.benchmark-definition dt { margin-bottom: 3px; color: var(--smoke); font-size: 13px; }
.benchmark-definition dd { margin: 0; color: var(--ash); font-size: 14px; }
.scroll-cue { display: none; color: var(--smoke); font-size: 12.5px; }
.benchmark-score strong { color: #fff; font: 400 16px var(--mono); }
.benchmark-table td strong { font-weight: 400; color: var(--bone); }

/* ------------------------------------------------------------------ compare */
.compare-form { padding-bottom: 8px; }
.compare-tools { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 12px; }
.selected-tray { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; padding: 10px 0 14px; color: var(--ash); font-size: 13.5px; }
.selected-tray strong { font-weight: 400; }
.selected-tray > div { display: flex; flex-wrap: wrap; gap: 6px; }
.selected-chip { padding: 2px 8px; border: 1px solid var(--ion-line); border-radius: 2px; color: var(--bone); font-size: 12.5px; }
.picker { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 1px; max-height: 340px; margin: 0; padding: 0; overflow: auto; border: 0; border-block: 1px solid var(--hair); }
.picker label { display: flex; align-items: flex-start; gap: 10px; padding: 9px 8px; cursor: pointer; }
.picker label:hover { background: var(--ion-wash); }
.picker input { margin-top: 3px; accent-color: var(--ion); }
.picker strong { display: block; font-size: 14px; font-weight: 400; }
.picker small { color: var(--smoke); font-size: 12px; }
.picker-empty { grid-column: 1 / -1; padding: 14px; color: var(--smoke); }
.compare-submit { position: sticky; bottom: 0; z-index: 3; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; padding: 14px 0; color: var(--ash); background: #000; font-size: 13.5px; }
.comparison { margin-top: 44px; border-top: 1px solid var(--hair-2); }
.compare-table thead th { color: var(--bone); font-size: 15px; white-space: normal; }
.compare-table tbody th { color: var(--smoke); font-size: 13px; white-space: nowrap; }
.compare-table .num { text-align: left; }

/* -------------------------------------------------------------------- paths */
.path-steps { margin: 0; padding: 0; list-style: none; }
.path-steps article { display: grid; grid-template-columns: 54px minmax(0, 1fr) auto; gap: 8px 16px; padding: 22px 0; border-top: 1px solid var(--hair); }
.step-number { color: var(--smoke); font-size: 34px; font-weight: 200; letter-spacing: -0.04em; line-height: 1; }
.step-copy h3 { font-size: 21px; font-weight: 300; letter-spacing: -0.02em; }
.step-purpose { margin: 8px 0 4px; color: var(--bone); font-size: 14.5px; }
.step-copy p { color: var(--ash); font-size: 14.5px; }
.step-copy .meta { color: var(--smoke); font-size: 12.5px; }
.step-actions { display: grid; align-content: start; justify-items: end; gap: 6px; }
.path-outcome { color: var(--ash); }
.path-table .outcome { color: var(--smoke); }

/* ------------------------------------------------------------ history, ledger */
.revision-history { display: grid; gap: 8px; }
.rev-title { display: flex; align-items: baseline; gap: 12px; }
.rev-title strong { color: var(--bone); font-size: 15.5px; font-weight: 400; }
.revision { color: var(--smoke); font: 400 12.5px var(--mono); }
.rev-meta { display: flex; align-items: baseline; gap: 12px; color: var(--smoke); font-size: 12.5px; }
.revision-history h2 { margin-bottom: 8px; color: var(--ash); font-size: 14px; }
.revision-history details summary { color: var(--ash); font-size: 13.5px; cursor: pointer; }
.kind-cell { color: var(--smoke) !important; font-size: 13px; }

/* ------------------------------------------------------------------ account etc. */
.account-grid { margin-top: 18px; }
.compact-list p { display: grid; gap: 1px; margin: 0; padding: 8px 0; border-top: 1px solid var(--hair); }
.compact-list small { color: var(--smoke); font-size: 12.5px; }
.link-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.token-box code { display: block; overflow-wrap: anywhere; color: var(--ion); }
.token-list > div { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; padding: 9px 0; border-top: 1px solid var(--hair); }
.token-list span { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; }
.token-list strong { font-weight: 400; }
.token-list small { color: var(--smoke); }
.logout { margin: 0; }
.auth-wrap { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, 440px); gap: clamp(24px, 6vw, 96px); align-items: center; min-height: calc(100vh - var(--bar) - 220px); }
.auth-card { padding-top: 22px; }
.auth-card form { display: grid; }
.auth-card .fg-btn { width: 100%; min-height: 42px; }
.auth-links { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px; margin: 16px 0 0; color: var(--ash); font-size: 13.5px; }
.pricing-grid .fg-panel-head h2 { color: var(--bone); font-size: 22px; font-weight: 300; }
.price { font-size: 34px; font-weight: 200; letter-spacing: -0.04em; }
.price small { color: var(--smoke); font-size: 14px; letter-spacing: 0; }
.plan-list { margin: 0 0 16px; padding: 0; list-style: none; }
.plan-list li { padding: 8px 0; border-top: 1px solid var(--hair); color: var(--ash); font-size: 14.5px; }
.pay-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.pricing-grid .featured { border-top-color: var(--ion); }
.error-page { max-width: 640px; margin-top: 60px; }
.error-page h1 { font-size: 40px; font-weight: 220; letter-spacing: -0.04em; }
.legal-panel { padding-top: 26px; }

/* ------------------------------------------------------------- moved documents */
.doc-block { margin-top: 44px; border-top: 1px solid var(--hair); }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 30px; padding: 22px 0 18px; }
.section-head h2 { font-size: clamp(24px, 1.2vw + 16px, 36px); font-weight: 260; letter-spacing: -0.03em; }
.section-head p { max-width: 58ch; margin: 0; color: var(--ash); font-size: 15px; }
.route-diagram { display: grid; grid-template-columns: minmax(0, 1fr) 150px minmax(0, 1fr) 150px minmax(0, 1fr); align-items: center; margin: 0; padding: 8px 0 4px; }
.route-node { display: grid; gap: 3px; padding: 14px 16px; border: 1px solid var(--hair-2); }
.route-node.chosen { border-color: var(--ion-line); background: var(--ion-wash); box-shadow: 0 0 60px -22px var(--ion); }
.route-node span { color: var(--smoke); font-size: 12.5px; }
.route-node strong { font-weight: 400; }
.route-node small { color: var(--smoke); font-size: 12.5px; }
.route-link { position: relative; height: 1px; margin: 0 8px; background: var(--hair-2); }
.route-link.dashed { background: repeating-linear-gradient(90deg, var(--hair-2) 0 6px, transparent 6px 11px); }
.route-link span { position: absolute; bottom: 6px; left: 0; right: 0; color: var(--smoke); font-size: 11.5px; line-height: 1.3; text-align: center; }
.route-diagram figcaption { grid-column: 1 / -1; margin-top: 12px; color: var(--smoke); font-size: 12.5px; }
.direction-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 clamp(20px, 3vw, 44px); margin: 0; padding: 0; list-style: none; }
.direction-list li { padding: 12px 0 20px; border-top: 1px solid var(--hair); }
.direction-list h3 { margin-bottom: 8px; font-size: 18px; font-weight: 340; }
.direction-list p { margin: 0; color: var(--ash); font-size: 14.5px; }
.profile-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0 28px; margin: 0; }
.profile-list > div { padding: 11px 0; border-top: 1px solid var(--hair); }
.profile-list dd { margin: 3px 0 0; color: var(--smoke); font-size: 13.5px; }
.doc-read { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: clamp(24px, 5vw, 80px); align-items: start; margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--hair); }
.aside { display: grid; gap: 26px; position: sticky; top: calc(var(--bar) + 16px); }
.aside-section h2 { margin-bottom: 8px; color: var(--ash); font-size: 13.5px; }
.aside-section ul { margin: 0; padding: 0; list-style: none; }
.aside-section li { padding: 6px 0; border-top: 1px solid var(--hair); font-size: 14px; }
.note { padding: 12px 14px; border-left: 1px solid var(--warn); color: #e9dcb8; font-size: 14.5px; }
.note strong { display: block; color: var(--warn); font-weight: 500; }
.revision { display: inline; }
.prose .revision { display: block; margin-top: 18px; color: var(--smoke); font-family: var(--sans); font-size: 13px; }

/* ------------------------------------------------------------------ transitions */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: 140ms var(--ease) both vt-out; }
::view-transition-new(root) { animation: 240ms var(--ease) both vt-in; }
@keyframes vt-out { to { opacity: 0; } }
@keyframes vt-in { from { opacity: 0; } }

/* ------------------------------------------------------------------ responsive */
@media (max-width: 1180px) {
  .fg-reading { grid-template-columns: 190px minmax(0, 1fr); }
  .fg-reading .fg-facts { position: static; grid-column: 2; }
  .ai-cmd { min-width: 0; }
  .ai-cmd span { display: none; }
}
@media (max-width: 980px) {
  .ai-nav { display: none; }
  .ledger { grid-template-columns: minmax(0, 1fr); }
  .ledger-side { position: static; }
  .path-row { grid-template-columns: minmax(0, 1fr); }
  .path-row li + li { border-top: 1px solid var(--hair); border-left: 0; }
  .systems { grid-template-columns: minmax(0, 1fr); }
  .system + .system { border-top: 0; border-left: 1px solid var(--hair); }
  .list-layout, .benchmark-layout, .doc-read, .auth-wrap { grid-template-columns: minmax(0, 1fr); }
  .rail { position: static; }
  .rail ul { display: flex; flex-wrap: wrap; gap: 4px 14px; border: 0; }
  .rail a { padding: 2px 0; border: 0; }
  .benchmark-side, .aside { position: static; max-height: none; }
  .benchmark-definition { grid-template-columns: minmax(0, 1fr); }
  .route-diagram { grid-template-columns: minmax(0, 1fr); }
  .route-link { width: 1px; height: 22px; margin: 0 0 0 18px; }
  .route-link span { display: none; }
  .direction-list { grid-template-columns: minmax(0, 1fr); }
  .fg-grid { grid-template-columns: minmax(0, 1fr); }
  .fg-grid > [class*="span-"] { grid-column: 1 / -1; }
  .scroll-cue { display: block; }
}
@media (max-width: 760px) {
  .fg-reading { grid-template-columns: minmax(0, 1fr); }
  .fg-reading > * { grid-column: 1 !important; }
  .fg-toc { position: static; max-height: 220px; }
  .fg-facts { position: static; }
  .ai-tool-link, .ai-cmd kbd { display: none; }
  .ai-sheet { width: 100vw; border-left: 0; }
  .field-title { font-size: clamp(54px, 15vw, 110px); }
  .path-steps article { grid-template-columns: 40px minmax(0, 1fr); }
  .step-actions { grid-column: 2; justify-items: start; }
  .compare-tools { grid-template-columns: minmax(0, 1fr); }
  .fg-table td.lead { min-width: 150px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  @view-transition { navigation: none; }
  .field-canvas { opacity: 1; }
}
@media print {
  :root { color-scheme: light; }
  body { color: #000; background: #fff; }
  .ai-bar, .ai-foot, .cmd { display: none !important; }
}