@font-face{font-family:"Newsreader";src:url("fonts/newsreader-latin.woff2") format("woff2");font-weight:400 700;font-display:swap}
@font-face{font-family:"Newsreader";src:url("fonts/newsreader-latin-ext.woff2") format("woff2");font-weight:400 700;font-display:swap;unicode-range:U+0100-024F,U+1E00-1EFF}
@font-face{font-family:"Atkinson";src:url("fonts/atkinson-latin.woff2") format("woff2");font-weight:400 700;font-display:swap}
@font-face{font-family:"Atkinson";src:url("fonts/atkinson-latin-ext.woff2") format("woff2");font-weight:400 700;font-display:swap;unicode-range:U+0100-024F,U+1E00-1EFF}
@font-face{font-family:"PlexMono";src:url("fonts/plexmono-latin.woff2") format("woff2");font-weight:400 600;font-display:swap}
@font-face{font-family:"PlexMono";src:url("fonts/plexmono-latin-ext.woff2") format("woff2");font-weight:400 600;font-display:swap;unicode-range:U+0100-024F,U+1E00-1EFF}
:root{
--bg:#f3ecdb;--paper:#faf5e8;--ink:#241f16;--muted:#6b6152;--line:#d8cdb2;
--accent:#9a5b12;--accent-ink:#fff7e8;--focus:#0f5fd0;
--serif:"Newsreader",Georgia,serif;--sans:"Atkinson",system-ui,sans-serif;--mono:"PlexMono",ui-monospace,monospace;
}
:root[data-theme="dark"]{
--bg:#141a29;--paper:#1d2438;--ink:#e9e2d2;--muted:#a9a294;--line:#333d5c;
--accent:#e8a33d;--accent-ink:#241a08;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--serif);font-size:1.13rem;line-height:1.65}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--bg);padding:.6rem 1rem;z-index:60}
.skip:focus{left:0}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:.7rem 1rem;position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.home svg{width:26px;height:26px;color:var(--accent);display:block}
.topbar nav{display:flex;gap:.6rem;align-items:center;font-family:var(--sans);font-size:.95rem}
.edition{color:var(--ink);text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:.25rem .8rem}
#theme-toggle{background:none;border:1px solid var(--line);border-radius:999px;color:var(--ink);font:inherit;padding:.3rem .8rem;cursor:pointer}
.hero{position:relative;margin:0;min-height:92svh;display:flex;align-items:flex-end}
.hero picture{position:absolute;inset:0}
.hero img{width:100%;height:100%;object-fit:cover;display:block}
.hero-shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,12,20,.25) 0%,rgba(10,12,20,0) 35%,rgba(10,12,20,.78) 100%)}
.hero-over{position:relative;z-index:1;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:14px;max-width:44rem;margin:0 0 4.5rem clamp(1rem,4vw,2.5rem);padding:1.2rem clamp(1rem,4vw,2.5rem)}
.kicker{font-family:var(--sans);text-transform:uppercase;letter-spacing:.14em;font-size:.85rem;margin:0 0 .5rem;color:var(--ink)}
.hero-over h1{font-size:clamp(1.9rem,4.6vw,3.1rem);line-height:1.12;margin:0 0 .8rem;text-wrap:balance}
.deck{font-size:clamp(1.05rem,2vw,1.3rem);margin:0 0 1rem;max-width:36rem}
.jump a{color:var(--accent);font-family:var(--sans)}
.hint{font-family:var(--sans);font-size:.9rem;opacity:.85;margin:.4rem 0 0}
.hero-cap{position:absolute;z-index:1;right:0;bottom:0;margin:0;padding:.6rem .9rem;font-family:var(--sans);font-size:.78rem;color:#f7f1e1;background:rgba(10,12,20,.55);max-width:min(30rem,90vw)}
main{display:block}
.paper{max-width:44rem;margin:0 auto;padding:2.6rem clamp(1rem,4vw,1.4rem)}
.paper h2{font-size:1.7rem;line-height:1.25;margin:0 0 1rem;text-wrap:balance}
.paper h3{font-size:1.25rem;margin:2rem 0 .6rem}
.lede{font-size:1.2rem;color:var(--muted)}
.paper p{margin:0 0 1rem}
.small{font-size:.92rem;color:var(--muted)}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
section[id],article[id]{scroll-margin-top:calc(var(--topbar-h,60px) + .6rem)}
.fig{margin:1.6rem 0}
.fig img{width:100%;height:auto;border:1px solid var(--line);border-radius:12px;display:block}
.fig figcaption{font-size:.92rem;color:var(--muted);margin-top:.5rem}
.legend{display:flex;flex-wrap:wrap;gap:.4rem .9rem;list-style:none;margin:1rem 0 0;padding:0;font-family:var(--sans);font-size:.88rem;color:var(--muted)}
.legend .sw{display:inline-block;width:.8em;height:.8em;border-radius:50%;margin-right:.35em;vertical-align:baseline}
.legend .sw.a{background:#b3541e}
.legend .sw.c{background:#c99a2e}
.legend .sw.b{background:#5a6b8c}
.legend .sw.p{background:none;border:2px solid #3f7a3a}
.legend .sw.band{background:repeating-linear-gradient(45deg,#c99a2e 0 2px,transparent 2px 5px);border-radius:0}
.bringbox{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:1.2rem;margin-top:1.2rem}
.bringbox h3{margin-top:0}
.bringbox label{font-family:var(--sans);font-weight:700;display:block;margin-bottom:.4rem}
.bring-row{display:flex;gap:.6rem;flex-wrap:wrap}
.bring-row input{flex:1;min-width:9rem;font:inherit;padding:.65rem .8rem;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink)}
.bringbox button[type="submit"]{font:inherit;background:var(--accent);color:var(--accent-ink);border:0;border-radius:10px;padding:.65rem 1.1rem;cursor:pointer;min-height:44px}
.answer{font-family:var(--sans);min-height:1.6em;margin:.7rem 0 0}
.answer ul{margin:.3rem 0 0;padding-left:1.2rem}
.ghost{background:none;border:1px solid var(--line);border-radius:999px;color:var(--ink);font-family:var(--sans);font-size:.9rem;padding:.35rem .9rem;cursor:pointer;min-height:44px}
.bring-actions{margin:.4rem 0 0}
.stage-grid{display:grid;gap:0}
.axisfig{margin:1.4rem 0}
.axisfig svg{width:100%;height:auto;background:var(--paper);border:1px solid var(--line);border-radius:12px;display:block}
.axisfig{position:relative}
.axisfig figcaption{font-size:.92rem;color:var(--muted);margin-top:.5rem}
.axisfig .tip{position:absolute;z-index:6;transform:translate(-8%,-115%);background:var(--ink);color:var(--bg);font-family:var(--sans);font-size:.85rem;padding:.3rem .6rem;border-radius:8px;white-space:nowrap;pointer-events:none}
.axisfig .tip[hidden]{display:none}
.axisfig text{font-family:var(--sans)}
.axisfig .era{fill:color-mix(in srgb,var(--accent) 14%,transparent)}
.axisfig .era-line{stroke:var(--accent);stroke-width:2;opacity:.55}
.axisfig .era-lab{font-size:15px;fill:var(--muted)}
.axisfig .lane{stroke:var(--line);stroke-width:2}
.axisfig .lane-lab{font-size:17px;fill:var(--muted);font-family:var(--mono)}
.axisfig .tick{stroke:var(--muted);stroke-width:1.5}
.axisfig .tick-lab{font-size:15px;fill:var(--muted);font-family:var(--mono)}
.axisfig .band{fill:url(#hatch);stroke:#c99a2e;stroke-width:1.5;stroke-dasharray:7 5}
.axisfig .mark{cursor:pointer}
.axisfig .mark circle,.axisfig .mark rect{transition:opacity .5s}
.axisfig .mark .ma{fill:#b3541e}
.axisfig .mark .mc{fill:#c99a2e}
.axisfig .mark .mb{fill:#5a6b8c}
.axisfig .mark .mp{fill:none;stroke:#3f7a3a;stroke-width:2.5}
.axisfig[data-reading="0"] .mark[data-r="1"],.axisfig[data-reading="0"] .mark[data-r="2"],.axisfig[data-reading="0"] .band{display:none}
.axisfig[data-reading="1"] .mark[data-r="2"]{display:none}
.axisfig .axis-win{fill:color-mix(in srgb,var(--accent) 20%,transparent);stroke:var(--accent);stroke-width:1.5;stroke-dasharray:6 4}
.axisfig .axis-mark line{stroke:var(--focus);stroke-width:2.5}
.axisfig .axis-mark text{font-size:16px;fill:var(--focus);font-family:var(--mono)}
.step{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:1.1rem 1.2rem;margin:0 0 1.4rem}
.step.active{border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 35%,transparent)}
.step .tag{font-family:var(--mono);font-size:.8rem;color:var(--accent);margin:0 0 .3rem}
.step h3{margin:0 0 .4rem;font-size:1.2rem}
.step p{margin:0 0 .7rem;font-size:1.02rem}
.step p:last-child{margin-bottom:0}
.read-group{border:0;margin:0;padding:0;display:grid;gap:.6rem}
.read-card{display:grid;grid-template-columns:auto 1fr;gap:.2rem .8rem;align-items:baseline;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:.8rem 1rem;cursor:pointer}
.read-card:has(:checked){border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 40%,transparent)}
.read-card input{width:1.1rem;height:1.1rem;accent-color:var(--accent);grid-row:span 2;align-self:center}
.read-t{font-weight:700}
.read-d{font-size:.95rem;color:var(--muted);grid-column:2}
.led{margin:0 0 1.6rem}
.led h3{font-size:1.15rem;margin:0 0 .5rem}
.led ul{list-style:none;margin:0;padding:0;font-size:.98rem}
.led-row{padding:.42rem .1rem;border-top:1px solid var(--line);scroll-margin-top:calc(var(--topbar-h,60px) + .6rem)}
.led-row:last-child{border-bottom:1px solid var(--line)}
.led-row b{font-family:var(--mono);font-weight:600}
.led-row .y{font-family:var(--mono)}
.led-row .cyr{font-family:"Times New Roman",serif}
.led-note{font-size:.92rem;color:var(--muted)}
.vec-list{list-style:none;margin:0;padding:0;display:grid;gap:.7rem}
.vec-list a{display:block;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:.8rem 1rem;text-decoration:none;color:var(--ink)}
.vec-list a:hover{border-color:var(--accent)}
.vec-list strong{display:block}
.vec-list span{font-size:.95rem;color:var(--muted)}
.share{max-width:44rem;margin:0 auto;padding:0 clamp(1rem,4vw,1.4rem) 2rem}
.foot{border-top:1px solid var(--line);padding:1.2rem;text-align:center;font-family:var(--sans);font-size:.9rem;color:var(--muted)}
.foot a{color:inherit}
.rail{display:none}
@media (min-width:64rem){
.stage-grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:1.6rem;max-width:76rem;margin:0 auto;padding:0 clamp(1rem,4vw,1.4rem)}
.axis-stick{position:sticky;top:calc(var(--topbar-h,60px) + .6rem);align-self:start}
.flow{padding:1.4rem 0}
.paper.wide{max-width:76rem}
}
@media (min-width:80rem){
.hero-over{margin-left:10rem}
.rail{display:flex;flex-direction:column;gap:.9rem;position:fixed;left:1rem;top:50%;translate:0 -50%;z-index:40;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:.8rem .9rem}
.rail a{display:flex;gap:.5rem;align-items:center;text-decoration:none;color:var(--muted);font-family:var(--sans);font-size:.82rem}
.rail a.now{color:var(--accent)}
.rail .dot{width:.6rem;height:.6rem;border-radius:50%;border:2px solid currentColor;display:block}
.rail a.now .dot{background:currentColor}
}
@media (max-width:40rem){
.hero-over{margin-bottom:5.2rem;padding:1rem}
.hero-cap{left:0;right:0;max-width:none}
body{font-size:1.06rem}
.axis-stick{position:sticky;top:calc(var(--topbar-h,60px));z-index:5;background:var(--bg)}
.axisfig{margin:.8rem 0}
}
@media (prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
.axisfig .mark circle,.axisfig .mark rect{transition:none}
}
/* share row (standards/v2/tools/share_row.py) */
.share-row{display:flex;flex-wrap:wrap;gap:.35rem;align-items:center}
.share-row .lab{font-size:.95rem;margin-inline-end:.3rem}
.share-row a,.share-row button{display:inline-grid;place-items:center;flex:none;width:2.5rem;height:2.5rem;padding:0;border-radius:50%;border:1px solid var(--sr-line,color-mix(in srgb,currentColor 28%,transparent));background:transparent;color:var(--sr-ink,inherit);text-decoration:none;cursor:pointer;font:inherit;transition:color .15s,border-color .15s}
.share-row a:hover,.share-row button:hover,.share-row a:focus-visible,.share-row button:focus-visible{color:var(--sr-acc,inherit);border-color:var(--sr-acc,currentColor)}
.share-row [hidden]{display:none}
@media (pointer:coarse){.share-row a,.share-row button{width:2.75rem;height:2.75rem}}
@media (max-width:30rem){.share-row .lab{flex-basis:100%;margin:0 0 .15rem}}
.share-status{font-size:.92rem;color:var(--sr-ok,inherit);min-height:1.2em;margin:.4rem 0 0}
.share-status:empty{display:none}
.share-field{display:block;width:100%;max-width:36rem;margin-top:.4rem;font:inherit;font-size:.9rem}