/* ==========================================================================
   FreedzHost design system (docs/UNIVERS.md)
   Tokens: one copper accent, three neutrals, one text color in opacity
   steps. Sage is functional only (ok states), red functional only (errors).
   Motion: transform + opacity only, cubic-bezier(.22,1,.36,1), 150-250 ms
   micro / 400-600 ms transitions, all of it off under prefers-reduced-motion.
   ========================================================================== */

:root {
  /* Neutrals */
  --bg: #12100e;
  --surface: #1c1915;
  --raise: #241e18;
  --line: rgba(255, 255, 255, .07);
  --code: #0e0c0a;

  /* The one accent: FoxBot copper */
  --accent: #e07a2f;

  /* Functional states only — never decorative */
  --ok: #7ba05b;
  --bad: #e8725f;

  /* Text: one color, three opacity steps */
  --text: #efe9e0;
  --text-1: color-mix(in srgb, var(--text) 90%, transparent);
  --text-2: color-mix(in srgb, var(--text) 60%, transparent);
  --text-3: color-mix(in srgb, var(--text) 38%, transparent);

  /* Typography: Fraunces for display, Inter for text; scale 12/14/16/20/28/40/64 */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-text: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", monospace;
  --s12: .75rem; --s14: .875rem; --s16: 1rem; --s20: 1.25rem;
  --s28: 1.75rem; --s40: 2.5rem; --s64: 4rem;

  /* Spacing: 4 px base grid; sections breathe 96 px desktop / 48 px mobile */
  --sp: 4px;
  --pad-section: 48px;

  /* Radius: 8 px cards, 999 px pills. One shadow. */
  --r-card: 8px;
  --r-pill: 999px;
  --shadow: 0 12px 32px -16px rgba(0, 0, 0, .55);

  /* Motion */
  --t-micro: 200ms;
  --t-page: 500ms;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --breath: cubic-bezier(.37, 0, .63, 1);

  color-scheme: dark;
}

@media (min-width: 760px) { :root { --pad-section: 96px; } }

@font-face { font-family: "Fraunces"; font-weight: 600; font-style: normal; font-display: swap;
  src: url(/fonts/fraunces-600.woff2) format("woff2"); }
@font-face { font-family: "Fraunces"; font-weight: 600; font-style: italic; font-display: swap;
  src: url(/fonts/fraunces-600-italic.woff2) format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 400; font-style: normal; font-display: swap;
  src: url(/fonts/inter-regular.woff2) format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; font-style: normal; font-display: swap;
  src: url(/fonts/inter-semibold.woff2) format("woff2"); }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; padding-inline: 16px; position: relative;
  background: var(--bg); color: var(--text-1);
  font: 400 var(--s16)/1.6 var(--font-text);
  background-image: radial-gradient(120% 60% at 50% -10%, rgba(224, 122, 47, .06), transparent 60%);
  background-attachment: fixed;
}
body::before { /* film grain: feTurbulence in a data URI, 3% */
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
::selection { background: var(--accent); color: var(--bg); }

a { color: var(--accent); }
strong { font-weight: 600; color: var(--text); }
main, footer { max-width: 760px; margin-inline: auto; }

.skip { position: fixed; top: 8px; left: 8px; z-index: 100; padding: 10px 20px;
  background: var(--accent); color: var(--bg); border-radius: var(--r-pill);
  font-weight: 600; text-decoration: none; transform: translateY(-220%);
  transition: transform var(--t-micro) var(--ease); }
.skip:focus-visible { transform: none; }

/* ---- The sticky nav: a blurred bar over the page ---- */
.top { position: sticky; top: 0; z-index: 30;
  display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap;
  margin-inline: -16px; padding: 14px max(16px, calc((100% - 760px) / 2 + 16px));
  background: rgba(18, 16, 14, .72); border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2); }
.brand { font: 700 22px/1 var(--font-mono); color: var(--text); text-decoration: none; }
.brand span { color: var(--accent); }
nav a { margin-left: 18px; color: var(--text-2); text-decoration: none; }
nav a:hover { color: var(--text); }
nav a.menu-btn { margin-left: 0; color: var(--text); }
nav a.help { color: var(--accent); }
nav a.support { color: var(--ok); }
.top-link { display: none; }
@media (min-width: 1024px) {
  /* The fixed drawer already carries the brand: the bar keeps the quick links. */
  .top > .brand { display: none; }
  .top-link { display: inline; }
}

/* ---- Typography ---- */
h1, h2, h3 { color: var(--text); }
h1, h2 { font-family: var(--font-display); font-weight: 600; letter-spacing: -.01em; }
h1 { font-size: clamp(var(--s40), 5vw, var(--s64)); line-height: 1.05; margin: 12px 0 22px; text-wrap: balance; }
h2 { font-size: var(--s28); margin-top: 2.8em; padding-top: 1.1em; border-top: 1px solid var(--line); }
h2::before { content: ""; display: block; width: 36px; height: 2px; background: var(--accent); margin: -1.1em 0 .9em; position: relative; top: -1px; }
.lead { font-size: var(--s20); color: var(--text-2); }
.caption { color: var(--text-2); font-size: var(--s14); }
.kicker, .revue time { font: 600 var(--s12)/1.4 var(--font-mono); letter-spacing: .22em; text-transform: uppercase; color: var(--accent); }

/* Links: an underline that draws itself */
main a:not(.give):not(.cta):not([class]), article p a, article li a:not([class]) {
  text-decoration: none; background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat;
  transition: background-size var(--t-page) var(--ease); }
main a:not(.give):not(.cta):not([class]):hover, article p a:hover, article li a:not([class]):hover { background-size: 100% 1px; }

/* The one CTA: a copper pill */
.cta { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 26px;
  border: 0; border-radius: var(--r-pill); background: var(--accent); color: var(--bg);
  font: 600 var(--s16)/1 var(--font-text); text-decoration: none; cursor: pointer;
  transition: transform var(--t-micro) var(--ease), box-shadow var(--t-micro) var(--ease); }
.cta:hover { transform: translateY(-2px); box-shadow: 0 10px 28px -10px rgba(224, 122, 47, .5); }
.cta[disabled] { opacity: .6; cursor: wait; transform: none; box-shadow: none; }

/* ---- Components shared by the inner pages ---- */
video { width: 100%; border-radius: var(--r-card); background: #000; display: block; margin: 24px 0 8px; }
pre { background: var(--code); border: 1px solid var(--line); border-radius: var(--r-card); padding: 14px 16px; overflow-x: auto; font-size: var(--s14); line-height: 1.5; }
code { font-family: var(--font-mono); }
:not(pre) > code { background: var(--surface); padding: 1px 6px; border-radius: 4px; font-size: .9em; }
.note { border-left: 3px solid var(--accent); background: var(--surface); padding: 10px 16px; border-radius: 0 var(--r-card) var(--r-card) 0; }
table { border-collapse: collapse; width: 100%; font-size: var(--s14); }
.table { overflow-x: auto; }
th, td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; }
.diagram { margin: 28px 0; padding: 18px 18px 12px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-card); overflow-x: auto; }
.diagram svg { display: block; margin: 0 auto; min-width: 520px; }
.diagram figcaption { color: var(--text-2); font-size: var(--s14); margin-top: 10px; }
.glossary dt { font-weight: 600; margin-top: 18px; color: var(--accent); }
.glossary dd { margin: 4px 0 0; }
.sources { font-size: var(--s14); color: var(--text-2); padding-left: 18px; }
.sources a { color: var(--text-2); }
.sources a:hover { color: var(--accent); }

/* Cards: 8 px radius, hairline border, one shadow, lift on hover */
.cards { list-style: none; padding: 0; display: grid; gap: 12px; }
.cards a { display: block; padding: 16px 18px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-card); color: var(--text-1); text-decoration: none; }
.cards a:hover { border-color: var(--accent); }
.cards strong { display: block; margin-bottom: 4px; }
.cards span { color: var(--text-2); font-size: var(--s14); }
.cards a, .offers li, .pager a, .track li { transition: transform var(--t-micro) var(--ease), border-color var(--t-micro) var(--ease), box-shadow var(--t-micro) var(--ease); }
.cards a:hover, .pager a:hover, .track li:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.cards li[hidden] { display: none; }
.cards .meta { display: flex; gap: 10px; margin-top: 8px; font-size: var(--s12); color: var(--text-2); }
.cards .meta em { font-style: normal; padding: 2px 8px; border-radius: var(--r-pill); background: rgba(224, 122, 47, .12); }
.cards .meta em.lv-intermediate, .cards .meta em.lv-advanced { background: rgba(224, 122, 47, .25); }

.series { margin: 28px 0 10px; font-size: var(--s12); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); display: flex; align-items: center; gap: 12px; }
.series .fox { flex: none; }
.fiche { display: flex; flex-wrap: wrap; gap: 8px 22px; padding: 12px 16px; margin: 0 0 22px; background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--text-2); border-radius: 0 var(--r-card) var(--r-card) 0; font-size: var(--s14); color: var(--text-2); }
.fiche b { color: var(--text); font-weight: 600; margin-right: 4px; }
.fiche.level-beginner { border-left-color: var(--ok); }
.fiche.level-intermediate { border-left-color: var(--accent); }
.fiche.level-advanced { border-left-color: var(--bad); }
.proof.revision { font-size: var(--s14); color: var(--text-2); margin: -4px 0 16px; border: 0; padding: 0; background: none; }

/* The daily briefing: an open editorial list, numbered, hairline-separated */
.revue { margin: 0; }
.revue header { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: baseline; justify-content: space-between; margin-bottom: 12px; }
.revue h2, .revue-archive-day h3 { border: 0; padding: 0; margin: 0; font-size: clamp(var(--s28), 4vw, var(--s40)); }
.revue h2::before, .revue-archive-day h3::before { display: none; }
.revue time { color: var(--text-2); }
.revue .empty { color: var(--text-2); margin: 0; }
.revue-items { list-style: none; padding: 0; margin: 0; }
.revue-item { padding: 20px 0; border-top: 1px solid var(--line); }
.revue ol.revue-items { counter-reset: briefing; }
.revue ol.revue-items .revue-item { counter-increment: briefing; display: grid; grid-template-columns: 56px 1fr; gap: 4px 8px; }
.revue ol.revue-items .revue-item::before { content: counter(briefing, decimal-leading-zero);
  grid-row: 1 / span 3; font: 600 italic var(--s28)/1.1 var(--font-display); color: var(--accent); opacity: .75; }
.revue-item .title { font: 600 var(--s20)/1.35 var(--font-display); color: var(--text); text-decoration: none; letter-spacing: -.01em; }
.revue-item .title:hover { color: var(--accent); }
.revue-item .source { display: block; color: var(--text-2); font: 600 var(--s12)/1.4 var(--font-mono); letter-spacing: .08em; margin-top: 4px; }
.revue-item p { margin: 8px 0 0; color: var(--text-2); font-size: var(--s16); }
.revue .more { margin: 18px 0 0; }
.revue .more a { font-weight: 600; text-decoration: none; }
.revue-archive-day { margin: 28px 0; }
.revue-archive-day h3 { font-size: var(--s20); color: var(--accent); margin-bottom: 10px; }

/* The offer cards of the training page */
.offers { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; margin: 22px 0; }
.offers li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-card); padding: 16px; }
.offers strong { display: block; color: var(--accent); margin-bottom: 6px; }
.offers span { color: var(--text-2); font-size: var(--s14); }

/* The contact form (help page) */
.contact { display: grid; gap: 14px; margin: 18px 0; }
.contact label { display: grid; gap: 6px; font-weight: 600; font-size: var(--s14); }
.contact input, .contact select, .contact textarea { font: inherit; font-weight: 400; color: var(--text); background: var(--code); border: 1px solid var(--line); border-radius: var(--r-card); padding: 10px 12px; }
.contact input:focus, .contact select:focus, .contact textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.contact .invalid { border-color: var(--bad); }
.contact label.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.contact label.check input { margin-top: 5px; }
.contact label.check:has(.invalid) { color: var(--bad); }
.contact .trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.contact button { justify-self: start; font: inherit; font-weight: 600; color: var(--bg); background: var(--accent); border: 0; border-radius: var(--r-pill); padding: 10px 26px; cursor: pointer; min-height: 48px; }
.contact button[disabled] { opacity: .6; cursor: wait; }
.form-status { min-height: 1.4em; margin: 8px 0 0; font-size: var(--s14); color: var(--text-2); }
.form-status.ok { color: var(--ok); }
.form-status.bad { color: var(--bad); }

/* The donation banner at the end of each tutorial */
.give { display: inline-block; margin: 8px 0 4px; padding: 12px 22px; border-radius: var(--r-pill); background: var(--accent); color: var(--bg); font-weight: 600; text-decoration: none; min-height: 48px; box-sizing: border-box; }
.give:hover { filter: brightness(1.08); }
.give-banner { margin-top: 40px; padding: 16px 18px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--surface);
  display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.give-banner p { margin: 0; color: var(--text-2); flex: 1 1 260px; }
.give-banner .give { margin: 0; }

/* ---- The side drawer: fixed on wide screens, an overlay opened by #menu on narrow ones (no script) ---- */
.drawer { position: fixed; inset: 0 auto 0 0; width: 240px; z-index: 40; overflow-y: auto;
  background: rgba(28, 25, 21, .88); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-right: 1px solid var(--line); padding: calc(16px + env(safe-area-inset-top, 0px)) 14px 20px;
  font-size: var(--s14); transform: translateX(-100%); transition: transform var(--t-micro) var(--ease); display: flex; flex-direction: column; }
.drawer:target { transform: none; box-shadow: 0 0 0 100vmax rgba(0, 0, 0, .55); }
.drawer .close { display: block; text-align: right; color: var(--text-2); text-decoration: none; margin-bottom: 6px; }
.drawer .brand { font: 700 18px/1 var(--font-mono); color: var(--text); text-decoration: none; margin: 0 0 14px; }
.drawer .brand span { color: var(--accent); }
.drawer .tree { display: grid; gap: 2px; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.drawer .tree > a, .drawer li a { display: flex; align-items: center; min-height: 44px; box-sizing: border-box; padding: 5px 8px; border-radius: var(--r-card); color: var(--text-2); text-decoration: none; line-height: 1.35; }
.drawer .tree > a { padding-top: 0; padding-bottom: 0; }
.drawer .tree > a:hover, .drawer li a:hover { color: var(--text); background: var(--bg); }
.drawer a[aria-current] { color: var(--accent); background: var(--bg); font-weight: 600; }
.drawer summary { cursor: pointer; color: var(--text); font-weight: 600; padding: 5px 4px; list-style-position: inside; min-height: 44px; box-sizing: border-box; display: flex; align-items: center; }
.drawer ul { list-style: none; margin: 2px 0 10px; padding-left: 8px; }
.drawer .badge { display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: var(--r-pill); background: var(--accent); color: var(--bg); font-size: var(--s12); font-weight: 600; text-transform: uppercase; vertical-align: 1px; }
.drawer .badge-soon { display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: var(--r-pill); background: var(--raise); color: var(--text-2); font-size: var(--s12); font-weight: 600; text-transform: uppercase; vertical-align: 1px; }
.drawer .bottom { margin-top: auto; display: grid; gap: 2px; padding-top: 12px; border-top: 1px solid var(--line); }
.drawer .bottom a { display: block; padding: 5px 8px; border-radius: var(--r-card); color: var(--text-2); text-decoration: none; line-height: 1.35; }
.drawer .bottom a:hover { color: var(--text); background: var(--bg); }
@media (min-width: 1024px) {
  .drawer { transform: none; }
  .drawer .close, nav a.menu-btn { display: none; }
  body { padding-left: calc(240px + 16px); }
}

/* Pager between the articles of a series */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 48px; }
.pager a { display: block; padding: 12px 14px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-card); color: var(--text-1); text-decoration: none; font-size: var(--s14); }
.pager a:hover { border-color: var(--accent); }
.pager small { display: block; color: var(--text-2); }
.pager .next { grid-column: 2; text-align: right; }
@media (max-width: 560px) { .pager { grid-template-columns: 1fr; } .pager .next { grid-column: 1; } }

/* FoxBot, one pose per series: next to series headings, in the drawer, and as the guide of an article. */
.drawer summary .fox { vertical-align: middle; margin-right: 6px; }
article > .guide { float: right; margin: -6px 0 8px 16px; shape-outside: circle(50%); }
@media (max-width: 560px) { article > .guide { width: 64px; height: 64px; } }

/* Keyword search */
.search { margin: 8px 0 16px; }
.search label { display: block; font-size: var(--s14); color: var(--text-2); margin-bottom: 4px; }
.search input { width: 100%; box-sizing: border-box; min-height: 48px; padding: 8px 12px; background: var(--code); color: var(--text); border: 1px solid var(--line); border-radius: var(--r-card); font: inherit; }
.search .results { list-style: none; margin: 6px 0 0; padding: 0; }
.search .results[hidden] { display: none; }
.search .results a, .search .results li { display: block; padding: 10px 8px; }
.drawer .search { margin: 8px 12px; }

/* Learning path: the track, its seals, its proofs (progress.js drives the state) */
.cards.learning-paths { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.cards.learning-paths a { padding: 24px; }
.cards.learning-paths .fox { margin-bottom: 14px; }
.cards.learning-paths strong { font: 600 var(--s20)/1.3 var(--font-display); letter-spacing: -.01em; }
.cards.learning-paths span { display: block; }
.cards.learning-paths em { display: inline-block; margin-top: 14px; font: 600 var(--s12)/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; font-style: normal; color: var(--accent); padding: 5px 10px; border: 1px solid rgba(224, 122, 47, .35); border-radius: var(--r-pill); }
.track { list-style: none; margin: 16px 0; padding: 0; position: relative; }
.track::before { content: ""; position: absolute; left: 27px; top: 20px; bottom: 20px; width: 2px; background: var(--line); }
.track::after { content: ""; position: absolute; left: 27px; top: 20px; width: 2px; height: calc((100% - 40px) * var(--done, 0)); background: var(--accent); transition: height var(--t-page) var(--ease); }
.track li { position: relative; z-index: 1; display: flex; align-items: center; flex-wrap: wrap; gap: 12px; padding: 12px; margin: 0 0 10px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--surface); }
.track .num { flex: 0 0 32px; height: 32px; border-radius: 50%; background: var(--accent); color: var(--bg); font-weight: 600; display: grid; place-items: center; box-shadow: 0 0 0 4px var(--bg); }
.track li.done .num { background: var(--ok); }
.track a { flex: 1; text-decoration: none; color: inherit; display: block; min-height: 44px; }
.track a strong { display: block; color: var(--accent); }
.track li.done a strong { color: var(--text); }
.track a span { display: block; color: var(--text-2); font-size: var(--s14); }
.track input { width: 24px; height: 24px; flex: 0 0 24px; }
.progress-line { display: flex; align-items: center; gap: 10px; }
.progress-line progress { flex: 1; height: 12px; }
.track .proof { flex: 0 0 calc(100% - 44px); min-width: 0; margin: 4px 0 0 44px; border: 0; padding: 0; background: none; border-radius: 0; }
.track .proof li { display: list-item; padding: 0; border: 0; border-radius: 0; background: none; transform: none; box-shadow: none; }
.track .proof li:hover { transform: none; box-shadow: none; }
@media (max-width: 560px) { .track .proof { flex-basis: 100%; margin-left: 0; } }
.proof summary, .proof-view summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; gap: 6px; color: var(--accent); }
.proof pre { overflow-x: auto; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--bg); font-size: var(--s12); }
.proof label { display: block; margin: 10px 0 4px; color: var(--text-2); font-size: var(--s14); }
.proof textarea { width: 100%; box-sizing: border-box; padding: 8px 10px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--bg); color: var(--text); font: var(--s12)/1.4 var(--font-mono); }
.proof textarea:focus-visible, .btn:focus-visible, .btn:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
.verdict { min-height: 1.4em; margin: 8px 0; color: var(--text-2); }
.proven .verdict { color: var(--ok); }
.unlocked h4 { margin: 14px 0 6px; font-size: var(--s16); }
.tips, .apps { margin: 0; padding-left: 1.2em; }
.tips li, .apps li { margin: 0 0 6px; }
.apps a { display: inline-block; min-height: 44px; line-height: 44px; }
.btn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 16px; border: 1px solid var(--accent); border-radius: var(--r-pill); background: transparent;
  color: var(--text); font: inherit; font-size: var(--s14); cursor: pointer; }
.btn:hover { background: rgba(224, 122, 47, .08); }
.btn.ghost { border-color: var(--line); color: var(--text-2); }

/* Campus: XP chip, quest seals, badges, the progress page */
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
.seal { flex: 0 0 auto; width: 14px; height: 14px; border-radius: 50%; border: 1.5px solid var(--line); background: transparent; display: inline-block; vertical-align: -2px; }
.earned .seal, .xp-chip .seal { border-color: var(--accent); background: radial-gradient(circle, var(--accent) 0 38%, transparent 42%); }
.drawer .xp-chip { display: flex; align-items: center; gap: 8px; min-height: 44px; margin: 0 0 12px; padding: 6px 10px; border: 1px solid var(--line); border-radius: var(--r-pill);
  color: var(--text); text-decoration: none; font: 600 var(--s12)/1.2 var(--font-mono); letter-spacing: .02em; }
.drawer .xp-chip:hover, .drawer .xp-chip[aria-current] { border-color: var(--accent); background: var(--bg); }
.bxp { color: var(--accent); font: 600 var(--s12)/1 var(--font-mono); white-space: nowrap; }
.state { margin-left: 8px; color: var(--text-2); font-size: var(--s12); }
.earned .state { color: var(--ok); }
.quest { margin: 24px 0 8px; padding: 16px 18px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--surface); }
.quest h2 { margin: 0 0 8px; padding: 0; border: 0; font-size: var(--s20); }
.quest h2::before { display: none; }
.quest-xp { margin: 0 0 10px; color: var(--text-2); }
.quest-xp strong { color: var(--text); }
.seals { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.seals li { display: flex; align-items: center; gap: 10px; }
.quest-status { min-height: 1.5em; margin: 10px 0 0; color: var(--ok); }
.profile .score { margin: 24px 0 8px; padding: 22px 24px; border: 1px solid var(--line); border-radius: var(--r-card);
  background: radial-gradient(120% 140% at 100% 0%, rgba(224, 122, 47, .07), transparent 60%), var(--surface); }
.profile .lvl { margin: 0; color: var(--text-2); }
.profile .lvl strong { color: var(--accent); font-family: var(--font-display); font-size: var(--s28); }
.profile .lvl em { font-style: normal; color: var(--text); font-family: var(--font-display); font-size: var(--s28); margin-left: 6px; }
.profile .xp { margin: 6px 0 12px; }
.profile .xp strong { font-family: var(--font-display); font-weight: 600; font-size: clamp(var(--s40), 6vw, var(--s64)); line-height: 1; }
.profile progress { width: 100%; height: 10px; }
.profile .stat { margin: 8px 0 0; color: var(--text-2); }
.profile .private { color: var(--text-2); font-size: var(--s14); }
.badges, .levels { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.badges li { display: flex; gap: 12px; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--surface); }
.badges li .seal { margin-top: 5px; }
.badges li:not(.earned) { color: var(--text-2); }
.badges p { margin: 6px 0 0; font-size: var(--s14); }
.badges .where a { min-height: 44px; display: inline-flex; align-items: center; }
.proof-view dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 6px 0 0; font-size: var(--s14); }
.proof-view dd { margin: 0; overflow-wrap: anywhere; }
.tip-card { margin: 0 0 12px; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--surface); }
.tip-card h3 { margin: 0 0 8px; font-size: var(--s16); }
.levels li { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 10px 14px; border-left: 2px solid var(--line); color: var(--text-2); }
.levels li.reached { border-left-color: var(--accent); color: var(--text); }
.levels li[aria-current] { background: var(--surface); border-radius: 0 var(--r-card) var(--r-card) 0; }
.levels .why { grid-column: 1 / -1; font-size: var(--s14); color: var(--text-2); }
.save { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.save p { flex-basis: 100%; margin: 4px 0 0; min-height: 1.4em; color: var(--ok); }

/* Series chips: the tutorials page filters itself, no reload */
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 26px; }
.chip { min-height: 44px; padding: 8px 16px; border: 1px solid rgba(224, 122, 47, .35);
  border-radius: var(--r-pill); background: transparent; color: var(--text-1); font: inherit;
  cursor: pointer; transition: background var(--t-micro) var(--ease), border-color var(--t-micro) var(--ease), transform var(--t-micro) var(--ease); }
.chip:hover { transform: translateY(-2px); border-color: var(--accent); }
.chip.on { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.hidden { display: none !important; }

/* The den: a faint copper halo that follows the cursor (den.js sets --mx/--my), plus two sober particle layers. */
.den { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden;
  background: radial-gradient(500px circle at var(--mx, 78%) var(--my, 12%), rgba(224, 122, 47, .08), transparent 70%); }
.den::before, .den::after { content: ""; position: absolute; inset: -10%; opacity: .5; transform: translate3d(var(--px, 0), var(--py, 0), 0); transition: transform var(--t-page) var(--ease);
  background-image: radial-gradient(1.5px 1.5px at 20% 30%, var(--text-2), transparent), radial-gradient(1px 1px at 70% 60%, var(--accent), transparent), radial-gradient(1px 1px at 45% 85%, var(--text-2), transparent), radial-gradient(1.5px 1.5px at 88% 15%, var(--text-2), transparent);
  background-size: 420px 420px; }
.den::after { background-size: 650px 650px; background-position: 130px 90px; opacity: .3; transform: translate3d(calc(var(--px, 0px) * -1.6), calc(var(--py, 0px) * -1.6), 0); }

/* Mascot sprites: the source frames keep their dark scene, so the edges melt into the den. */
.sprite { display: block; -webkit-mask-image: radial-gradient(closest-side, #000 62%, transparent 100%); mask-image: radial-gradient(closest-side, #000 62%, transparent 100%); }
.foot-fox { display: flex; align-items: center; gap: 14px; margin: 56px 0 0; color: var(--text-2); font-size: var(--s14); }
.foot-fox .sprite { width: 112px; height: 112px; flex: none; }
.frieze { position: relative; width: 224px; height: 224px; margin: 36px auto 8px; }
.frieze .sprite { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; }
.frieze .sprite:first-child { opacity: 1; }
.peek { position: fixed; right: 18px; bottom: 0; width: 120px; height: 120px; pointer-events: none; z-index: 5; opacity: 0; transform: translateY(40%); }
.peek .sprite { width: 120px; height: 120px; }
@media (max-width: 560px) { .peek { display: none; } }

/* ---- The footer: hairline, license line, and FoxBot breathing ---- */
footer { color: var(--text-2); font-size: var(--s14); padding-block: 40px; border-top: 1px solid var(--line); margin-top: 60px; }
footer .mascot { display: block; width: 128px; margin: 0 auto 18px; background: none; border-radius: 0; transform-origin: 50% 100%; }

/* ---- Home hero: the kitsunebi show (hero.js only enhances; the DOM is the final state) ---- */
.hero { position: absolute; inset: 0 0 auto; height: 100vh; height: 100svh; overflow: hidden;
  background: radial-gradient(130% 90% at 68% 8%, #1d1712 0%, var(--bg) 62%); }
body.home main { max-width: 1040px; padding-top: calc(100vh + 32px); padding-top: calc(100svh + 32px); }
body.home .top { position: sticky; z-index: 34; padding-inline: max(16px, calc((100% - 1040px) / 2 + 16px)); }
.hero-embers { position: absolute; inset: 0; z-index: 2; width: 100%; height: 100%; pointer-events: none; }
.hero-stage { position: relative; z-index: 3; height: 100%; max-width: 1160px; margin-inline: auto;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); align-items: center; gap: 16px;
  padding-inline: clamp(20px, 5vw, 64px); }
.hero-kicker { margin: 0 0 18px; font: 600 var(--s12)/1.4 var(--font-mono);
  letter-spacing: .22em; text-transform: uppercase; color: var(--accent); }
.hero-title { margin: 0 0 22px; font-family: var(--font-display); font-weight: 600; color: var(--text);
  font-size: clamp(3.2rem, 6vw, 5.6rem); line-height: .98; letter-spacing: -.02em; white-space: nowrap; }
.hero-title .hl { display: inline-block; }
.hero-tag { margin: 0; max-width: 30ch; font-size: var(--s20); color: var(--text-2); }
.hero-actions { margin: 32px 0 0; }
.hero-down { position: absolute; z-index: 3; left: 50%; bottom: 14px; translate: -50% 0;
  width: 44px; height: 44px; display: grid; place-items: center; color: var(--text-2); }
.hero-down:hover { color: var(--accent); }

/* The key art fills the hero; a scrim keeps the title legible, the parallax drifts it slowly. */
.hero-art { position: absolute; z-index: 0; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: 66% 50%; }
.hero::after { content: ""; position: absolute; z-index: 1; inset: 0; pointer-events: none;
  background: linear-gradient(100deg, rgba(18, 16, 14, .88) 18%, rgba(18, 16, 14, .38) 52%,
    rgba(18, 16, 14, .12) 100%); }
/* Hero exit: the scene fades into the page background instead of cutting. */
.hero::before { content: ""; position: absolute; z-index: 4; left: 0; right: 0; bottom: 0;
  height: 22%; pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--bg)); }

/* Parallax: --sc (0 at rest, 1 one viewport down) is set by hero.js. */
.hero-copy { transform: translateY(calc(var(--sc, 0) * 34%)); opacity: max(0, calc(1 - var(--sc, 0) * 1.6)); }
.hero-art { transform: translateY(calc(var(--sc, 0) * 10%)); }
.hero-embers { transform: translateY(calc(var(--sc, 0) * 22%)); }
.hero-down { opacity: max(0, calc(1 - var(--sc, 0) * 4)); }

@media (min-width: 1024px) {
  /* The fixed drawer owns the left 240 px: the hero composes in the rest. */
  .hero-stage { margin-left: 240px; margin-right: 0; max-width: none; }
}

@media (max-width: 760px) {
  .hero-stage { grid-template-columns: 1fr; align-content: center; }
  .hero::after { background: linear-gradient(180deg, rgba(18, 16, 14, .86) 12%,
      rgba(18, 16, 14, .55) 48%, rgba(18, 16, 14, .5) 100%); }
  .hero-art { object-position: 76% 50%; }
  .hero-copy { position: relative; z-index: 2; }
  .hero-title { font-size: clamp(3rem, 15vw, 4.6rem); }
}

/* The entrance: only when hero.js runs (is-live) and motion is welcome. */
@media (prefers-reduced-motion: no-preference) {
  @keyframes hero-letter { from { opacity: 0; transform: translateY(.35em) rotate(2deg); filter: blur(6px); }
    to { opacity: 1; transform: none; filter: none; } }
  @keyframes hero-fade { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
  @keyframes hero-bob { 50% { transform: translateY(6px); } }
  .hero.is-live .hero-kicker { opacity: 0; animation: hero-fade .6s var(--ease) 80ms forwards; }
  .hero.is-live .hero-title .hl { opacity: 0; animation: hero-letter .55s var(--ease) both; animation-delay: var(--d); }
  .hero.is-live .hero-tag { opacity: 0; animation: hero-fade .8s var(--ease) .95s forwards; }
  .hero.is-live .hero-actions { opacity: 0; animation: hero-fade .8s var(--ease) 1.2s forwards; }
  .hero.is-live .hero-down { opacity: 0; animation: hero-fade .6s ease 1.8s forwards; }
  .hero-down svg { animation: hero-bob 2.6s var(--breath) 2.6s infinite; }

  /* FoxBot: idle breathing loop (transform only); typing while an agent section
     is on screen (den.js toggles body.agent-on from [data-agent]). */
  @keyframes foxbot-breathe { 50% { transform: scale(1.035); } }
  @keyframes foxbot-type { 50% { transform: translateY(-3%); } }
  footer .mascot, .peek .sprite { animation: foxbot-breathe 3.4s var(--breath) infinite; }
  body.agent-on footer .mascot, body.agent-on .peek .sprite { animation: foxbot-type .5s var(--breath) infinite; }

  /* The about-page frieze: three breathing frames, stepped. */
  @keyframes frieze { 0%, 33% { opacity: 1; } 34%, 100% { opacity: 0; } }
  .frieze .sprite:nth-child(1) { animation: frieze 2.4s steps(1) infinite; }
  .frieze .sprite:nth-child(2) { animation: frieze 2.4s steps(1) infinite .8s; }
  .frieze .sprite:nth-child(3) { animation: frieze 2.4s steps(1) infinite 1.6s; }
  .frieze .sprite:nth-child(n+2) { opacity: 0; }

  /* The peek fox rises once the hero is read (scroll-timeline where available). */
  @supports (animation-timeline: view()) {
    @keyframes peek { from { opacity: 0; transform: translateY(40%); } to { opacity: 1; transform: none; } }
    body.home .peek { animation: peek linear both; animation-timeline: scroll(root); animation-range: 70% 100%; }
  }
  .den::before, .den::after { will-change: transform; }
}

/* The teammate anchoring the hero: one per load, its name tag beside it (hero.js). */
.hero-anchor-tag { position: absolute; z-index: 4; right: 8%; bottom: 46%;
  max-width: 20ch; padding: 6px 12px; border-left: 2px solid var(--accent);
  font-family: var(--font-display); font-style: italic; font-size: var(--s16); color: var(--text-1);
  background: rgba(18, 16, 14, .6); opacity: 0; transform: translateY(8px);
  transition: opacity var(--t-page) var(--ease) .25s, transform var(--t-page) var(--ease) .25s; pointer-events: none; }
.hero-anchor-tag.on { opacity: 1; transform: none; }
.hero-mascot { position: absolute; z-index: 3; right: 6%; bottom: 0; width: min(46vh, 420px);
  pointer-events: none; filter: drop-shadow(0 22px 34px rgba(0, 0, 0, .5)); }
/* The global video rule (black backdrop) must not paint behind the transparent mascot webm. */
.hero-mascot { background: none; border-radius: 0; margin: 0; }
@media (max-width: 760px) {
  .hero-mascot { width: min(34vh, 240px); right: 2%; opacity: .92; }
  .hero-anchor-tag { top: auto; bottom: 34%; right: 6%; font-size: var(--s14); }
}

/* ---- Home sections: briefing, paths, latest tutorial, letter ---- */
body.home main > section { padding-block: var(--pad-section); border-top: 1px solid var(--line); }
body.home main > section:first-child { border-top: 0; }
body.home main > section > h2, body.home main > section > header > h2 {
  border: 0; padding: 0; margin: 0 0 28px; font-size: clamp(var(--s28), 4vw, var(--s40)); }
body.home main > section > h2::before, body.home main > section > header > h2::before {
  content: ""; display: block; width: 36px; height: 2px; background: var(--accent); margin: 0 0 18px; position: static; }
body.home main > section > header { margin-bottom: 28px; }
body.home main > section > header h2 { margin: 0; }
body.home main > section > header h2::before { margin-bottom: 14px; }

/* The latest tutorial: one feature card. */
.latest-card { display: flex; align-items: center; gap: 24px; padding: 28px;
  background: radial-gradient(120% 160% at 100% 0%, rgba(224, 122, 47, .08), transparent 55%), var(--surface);
  border: 1px solid var(--line); border-radius: var(--r-card); text-decoration: none; color: var(--text-1);
  transition: transform var(--t-micro) var(--ease), border-color var(--t-micro) var(--ease), box-shadow var(--t-micro) var(--ease); }
.latest-card:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow); }
.latest-card .fox { flex: none; }
.latest-body { flex: 1; min-width: 0; }
.latest-body strong { display: block; font: 600 clamp(var(--s20), 3vw, var(--s28))/1.25 var(--font-display); letter-spacing: -.01em; color: var(--text); }
.latest-body .sum { display: block; margin-top: 8px; color: var(--text-2); }
.latest-body .meta { display: flex; gap: 10px; margin-top: 12px; font-size: var(--s12); color: var(--text-2); }
.latest-body .meta em { font-style: normal; padding: 2px 8px; border-radius: var(--r-pill); background: rgba(224, 122, 47, .12); }
.latest-card .go { flex: none; align-self: center; font-weight: 600; color: var(--accent); white-space: nowrap; }
@media (max-width: 620px) {
  .latest-card { flex-direction: column; align-items: flex-start; gap: 14px; padding: 20px; }
  .latest-card .fox { width: 56px; height: 56px; }
}

/* The den letter: a quiet centered form. */
.letter { text-align: center; }
.letter h2 { margin-inline: auto; }
.letter h2::before { margin-inline: auto !important; }
.letter .pitch { max-width: 52ch; margin: 0 auto 28px; color: var(--text-2); }
.letter-form { display: flex; gap: 10px; max-width: 480px; margin: 0 auto; }
.letter-form input { flex: 1; min-width: 0; min-height: 48px; padding: 8px 16px; box-sizing: border-box;
  background: var(--code); color: var(--text); border: 1px solid var(--line); border-radius: var(--r-pill); font: inherit; }
.letter-form input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.letter-form .form-status { flex-basis: 100%; text-align: center; }
.letter-form { flex-wrap: wrap; justify-content: center; }
.letter-note { margin: 20px auto 0; max-width: 52ch; font-size: var(--s14); color: var(--text-2); }

/* Scroll reveal (den.js adds will-reveal, lifts it with in-view; staggered 60 ms per batch). */
.will-reveal { opacity: 0; transform: translateY(16px); }
.will-reveal.in-view { opacity: 1; transform: none;
  transition: opacity var(--t-page) var(--ease), transform var(--t-page) var(--ease); }

body.about .lead::first-letter { font-family: var(--font-display); font-size: 3.4em; float: left; line-height: .85; padding: .06em .12em 0 0; color: var(--accent); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

@media (pointer: coarse) { .den::before, .den::after { display: none; } }

/* Reduced motion: no animation at all, the page is already in its final state. */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .will-reveal { opacity: 1; transform: none; }
  .peek { opacity: 1; transform: none; }
  .hero-embers { display: none; }
  .den { background: radial-gradient(500px circle at 78% 12%, rgba(224, 122, 47, .06), transparent 70%); }
}
.shot { margin: 28px 0; }
.shot img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--r-card); }
.shot figcaption { color: var(--text-2); font-size: var(--s14); margin-top: 10px; }
.shots { display: flex; flex-wrap: wrap; gap: 16px; margin: 28px 0; }
.shots .shot { margin: 0; flex: 1 1 200px; max-width: 300px; }