/* Jean's course — the jeanwwd.com system (projects/jeanwwd/portfolio/site/assets/css/tokens.css): Geist 300/400/500,
   light-grey Unseen paper, black ink, 1 px black rules, white pills, one black block per page, headings 400 mixed case. */
@font-face{font-family:'Geist';font-weight:300;font-display:swap;src:url('fonts/geist-300-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+2000-206F,U+2190-21FF,U+2212}
@font-face{font-family:'Geist';font-weight:300;font-display:swap;src:url('fonts/geist-300-cyrillic.woff2') format('woff2');unicode-range:U+0400-045F,U+2116}
@font-face{font-family:'Geist';font-weight:400;font-display:swap;src:url('fonts/geist-400-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+2000-206F,U+2190-21FF,U+2212}
@font-face{font-family:'Geist';font-weight:400;font-display:swap;src:url('fonts/geist-400-cyrillic.woff2') format('woff2');unicode-range:U+0400-045F,U+2116}
@font-face{font-family:'Geist';font-weight:500;font-display:swap;src:url('fonts/geist-500-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+2000-206F,U+2190-21FF,U+2212}
@font-face{font-family:'Geist';font-weight:500;font-display:swap;src:url('fonts/geist-500-cyrillic.woff2') format('woff2');unicode-range:U+0400-045F,U+2116}

:root{
  --ground:#e6e6e4; --ink:#141414; --ink-2:#646462; --surface:#fff; --surface-2:#f4f4f2; --rule:#141414; --rule-soft:#c9c9c7;
  --inv-ground:#111; --inv-ink:#f2f2f0; --inv-ink-2:#9a9a98; --inv-rule:rgba(242,242,240,.32);
  /* the figures from the abliteration lesson read these names */
  --fg:#141414; --fg-mid:#454543; --fg-soft:#8a8a88; --accent:#141414; --accent-soft:#f4f4f2;
  --pad:clamp(16px,4vw,64px); --max:1320px; --read:68ch;
  color-scheme:light;
}
*{box-sizing:border-box;margin:0}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{background:var(--ground);color:var(--ink);font:400 17px/1.55 Geist,system-ui,-apple-system,sans-serif;font-feature-settings:"tnum" 0}
a{color:inherit}
img,svg{max-width:100%;height:auto;display:block}
code{font:500 .88em ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--surface-2);padding:.08em .32em;border-radius:4px;overflow-wrap:anywhere}
pre{background:var(--surface);border:1px solid var(--rule-soft);border-radius:10px;padding:14px 16px;overflow-x:auto;font-size:14px;line-height:1.5}
pre code{background:none;padding:0}
small{display:block;font-size:.5em;font-weight:300;color:var(--ink-2);letter-spacing:0;margin-top:.35em}
h1,h2,h3{font-weight:400;letter-spacing:-.02em;line-height:1.05}
h1{font-size:clamp(40px,6.2vw,92px)}
h2{font-size:clamp(30px,3.8vw,56px)}
h3{font-size:clamp(20px,1.8vw,26px);letter-spacing:-.01em;line-height:1.2}
.label{font-size:13px;font-weight:500;letter-spacing:.02em;color:var(--ink-2);margin-bottom:14px}
.label a{text-decoration:none}
.label a:hover{text-decoration:underline}

.nav{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px var(--pad);background:color-mix(in srgb,var(--ground) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--rule)}
.nav__name{font-weight:500;text-decoration:none}
.nav__links{display:flex;gap:6px;flex-wrap:wrap}
.nav__links a{text-decoration:none;font-size:14px;padding:6px 12px;border-radius:99px;background:var(--surface)}
.nav__links a:hover{background:var(--ink);color:var(--ground)}
main{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:28px var(--pad);border-top:1px solid var(--rule);font-size:13px;color:var(--ink-2);margin-top:80px}

.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:99px;background:var(--surface);color:var(--ink);text-decoration:none;font-weight:500;font-size:15px;border:0;cursor:pointer}
.btn--primary{background:var(--ink);color:var(--ground)}
.btn--primary:hover{background:#000}

/* index */
.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:clamp(24px,4vw,64px);align-items:end;padding:clamp(40px,7vw,110px) 0 clamp(40px,5vw,72px);border-bottom:1px solid var(--rule)}
.hero h1{max-width:12ch}
.lead{font-size:clamp(18px,1.5vw,22px);font-weight:300;line-height:1.45;max-width:46ch;margin-top:24px}
.stats{list-style:none;padding:0;display:flex;gap:clamp(20px,3vw,48px);margin-top:36px;flex-wrap:wrap}
.stats b{display:block;font-size:clamp(30px,3.2vw,48px);font-weight:400;letter-spacing:-.02em;line-height:1}
.stats span{font-size:13px;color:var(--ink-2)}
.hero__pics{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.hero__pics figure{aspect-ratio:2/3;overflow:hidden;border-radius:10px;background:var(--surface-2)}
.hero__pics img{width:100%;height:100%;object-fit:cover}

.today{margin:40px 0 0;padding:22px 24px;background:var(--surface);border-radius:14px}
.today__body{display:grid;gap:8px;font-size:18px}
.today__body a{text-decoration:none;border-bottom:1px solid var(--rule-soft)}
.today__body a:hover{border-color:var(--ink)}

.inv{background:var(--inv-ground);color:var(--inv-ink);border-radius:18px}
.inv .label{color:var(--inv-ink-2)}
.inv code{background:#222;color:var(--inv-ink)}
.tutor{margin:56px 0 0;padding:clamp(28px,4vw,56px)}
.tutor h2{max-width:20ch}
.tutor__cols{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,3vw,48px);margin-top:28px;font-weight:300;color:#d6d6d4}

.track{padding-top:clamp(56px,7vw,100px)}
.track__h{display:grid;gap:4px;padding-bottom:20px;border-bottom:1px solid var(--rule)}
.mods{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 clamp(24px,3vw,48px)}
.mod{padding:26px 0 8px;border-bottom:1px solid var(--rule-soft)}
.mod__h{display:grid;grid-template-columns:2.4em 1fr auto;gap:10px;align-items:baseline;margin-bottom:12px}
.mod__n,.lc__n{font-size:13px;color:var(--ink-2);font-variant-numeric:tabular-nums}
.mod__c{font-size:13px;color:var(--ink-2);white-space:nowrap}
.lessons{list-style:none;padding:0}
.lc a,.lc--soon{display:grid;grid-template-columns:3.4em 1fr auto;gap:10px;align-items:baseline;padding:10px 0;border-top:1px solid var(--rule-soft);text-decoration:none}
.lc a:hover .lc__t{text-decoration:underline;text-underline-offset:3px}
.lc__t{font-size:16px;line-height:1.35}
.lc__t small{font-size:13px;margin-top:2px}
.lc__m{font-size:12px;color:var(--ink-2);white-space:nowrap}
.lc--soon{color:var(--ink-2)}
.lc.is-done .lc__n::before{content:"✓ ";color:var(--ink)}

.order{padding-top:clamp(56px,7vw,100px)}
.order__cols{display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(24px,4vw,64px);margin-top:28px}
.order h3{margin-bottom:8px}
.note{font-size:14px;color:var(--ink-2);max-width:56ch;margin-bottom:14px}
.sched{width:100%;border-collapse:collapse;font-size:15px}
.sched td{padding:9px 0;border-top:1px solid var(--rule-soft);vertical-align:top}
.sched td.d{width:9.5em;color:var(--ink-2);white-space:nowrap;padding-right:12px}
.sched tr.is-today td{font-weight:500}
.sched tr.is-today td.d{color:var(--ink)}
.sched a,.evening a{text-decoration:none;border-bottom:1px solid var(--rule-soft)}
.sched a:hover,.evening a:hover{border-color:var(--ink)}
.soon{color:var(--ink-2)}
.evening{padding-left:1.6em;font-size:15px;display:grid;gap:7px}

/* topics: one plain list of every topic with its lessons, filtered by course.js */
.topics-page .lh h1{max-width:none}
.tfilter{margin-top:28px;max-width:560px}
.tfilter .label{display:block;margin-bottom:8px}
.tfilter input{width:100%;font:400 17px/1.3 Geist,system-ui,sans-serif;color:var(--ink);background:var(--surface);border:1px solid var(--rule);border-radius:99px;padding:12px 20px;-webkit-appearance:none;appearance:none}
.tfilter input:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.tfilter__status{font-size:13px;color:var(--ink-2);margin-top:8px;min-height:1.4em}
.tlist{list-style:none;padding:0;max-width:820px;border-top:1px solid var(--rule)}
.topic{border-bottom:1px solid var(--rule-soft);scroll-margin-top:72px}
.topic summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:1fr auto 1.2em;gap:12px;align-items:baseline;padding:14px 0}
.topic summary::-webkit-details-marker{display:none}
.topic summary::after{content:"+";font-weight:300;font-size:22px;line-height:1;color:var(--ink-2)}
.topic[open] summary::after{content:"−"}
.topic summary:hover h2{text-decoration:underline;text-underline-offset:4px}
.topic summary:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.topic h2{font-size:clamp(20px,1.8vw,24px);letter-spacing:-.01em;line-height:1.25}
.topic .lessons{padding-bottom:12px}
.lh__topics{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:18px}
.lh__topics .label{margin:0 6px 0 0}
.lh__topics a{text-decoration:none;font-size:14px;padding:5px 12px;border-radius:99px;background:var(--surface)}
.lh__topics a:hover{background:var(--ink);color:var(--ground)}

/* lesson */
.lesson{max-width:960px}
.lh{padding:clamp(36px,6vw,88px) 0 28px;border-bottom:1px solid var(--rule)}
.lh h1{font-size:clamp(34px,5vw,68px);max-width:18ch}
.lh__en{font-size:clamp(17px,1.6vw,22px);font-weight:300;color:var(--ink-2);margin-top:12px}
.lh__actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:28px}
.done{font-size:14px;display:flex;gap:8px;align-items:center;cursor:pointer}
.done input{width:18px;height:18px;accent-color:var(--ink)}
.why{padding:28px 0;font-size:clamp(18px,1.6vw,21px);font-weight:300;border-bottom:1px solid var(--rule-soft)}
.why p{max-width:var(--read)}
.prose{padding:12px 0 8px}
.prose>*{max-width:var(--read)}
.prose h3{margin:40px 0 12px;padding-top:18px;border-top:1px solid var(--rule-soft)}
.prose p,.prose ul,.prose ol{margin:12px 0}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:5px 0}
.prose table{border-collapse:collapse;width:100%;max-width:100%;font-size:15px;margin:18px 0;display:block;overflow-x:auto}
.prose th,.prose td{text-align:left;padding:8px 12px 8px 0;border-top:1px solid var(--rule-soft);vertical-align:top}
.prose th{font-weight:500;border-top:1px solid var(--rule)}
.prose pre{max-width:100%}
.fig{margin:24px 0;padding:16px;background:var(--surface);border-radius:12px;max-width:100%}
.fig svg{width:100%;height:auto}
.fig figcaption{font-size:13px;color:var(--ink-2);margin-top:10px}
.gallery{display:grid;gap:22px;padding:24px 0;border-bottom:1px solid var(--rule-soft)}
.strip{min-width:0}
.strip .label{margin-bottom:8px}
.strip__row{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(110px,170px);gap:8px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:4px}
.strip__row figure{display:grid;gap:5px;scroll-snap-align:start;max-width:220px}
.strip__row img{border-radius:8px;aspect-ratio:2/3;object-fit:cover;width:100%}
.strip__row figcaption{font-size:12px;color:var(--ink-2);line-height:1.3}
.block{padding:30px 0;border-top:1px solid var(--rule)}
.block>p:not(.label),.block>ul,.block>ol{max-width:var(--read)}
.block ul,.block ol{padding-left:1.3em;margin:8px 0}
.block li{margin:5px 0}
.do{font-size:17px}
.terms{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px}
.terms div{padding:10px 0;border-top:1px solid var(--rule-soft)}
.terms dt{font-weight:500}
.terms dd{color:var(--ink-2);font-size:15px}
.qa{border-top:1px solid var(--rule-soft)}
.qa summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:2em 1fr 1.2em;gap:8px;padding:14px 0;font-size:17px}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";font-weight:300;font-size:22px;line-height:1;color:var(--ink-2)}
.qa[open] summary::after{content:"−"}
.qa__n{color:var(--ink-2);font-size:13px;padding-top:4px}
.qa>div{padding:0 0 16px 2.5em;color:#333;max-width:calc(var(--read) + 2.5em)}
.inv-soft{background:var(--surface);border-radius:16px;padding:28px clamp(16px,3vw,32px);border-top:0;margin:8px 0}
.phrases{list-style:none;padding:0 !important}
.phrases li{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:16px;padding:10px 0;border-top:1px solid var(--rule-soft)}
.phrases .en{font-weight:500}
.phrases .ru{color:var(--ink-2);font-size:15px}
.lab{color:var(--ink-2);font-size:15px}
.diagram{display:grid;gap:10px;padding:18px;background:var(--surface);border-radius:12px;overflow-x:auto}
.dg-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.dg-step{padding:6px 12px;border:1px solid var(--ink);border-radius:99px;font-size:14px;white-space:nowrap}
.dg-arrow{color:var(--ink-2)}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:32px 0;border-top:1px solid var(--rule)}
.pager a{text-decoration:none;padding:18px;background:var(--surface);border-radius:14px;font-size:16px}
.pager a:hover{background:var(--ink);color:var(--ground)}
.pager a:hover small{color:var(--inv-ink-2)}
.pager small{font-size:12px;margin:0 0 4px}
.pager .next{text-align:right}

@media (max-width:860px){
  body{font-size:16px}
  .hero{grid-template-columns:1fr}
  .hero__pics{order:-1}
  .mods,.order__cols,.tutor__cols,.terms{grid-template-columns:1fr}
  .phrases li{grid-template-columns:1fr;gap:2px}
  .nav__links a{padding:5px 10px;font-size:13px}
  .sched td.d{width:auto}
  .pager{grid-template-columns:1fr}
  .pager .next{text-align:left}
}
@media (max-width:420px){.nav__links a:nth-child(3){display:none}}