@font-face{font-family:"Albert Sans";src:url("fonts/AlbertSans/albert-sans-latin-wght-normal.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Albert Sans";src:url("fonts/AlbertSans/albert-sans-latin-ext-wght-normal.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap;unicode-range:U+0100-02BA,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20CF,U+2113,U+2C60-2C7F,U+A720-A7FF}

:root{
  --ink:#000;--paper:#fff;--mist:#f2f2f2;--line:#e1e1e4;--mute:#5f5f68;
  --accent:#F70F31;--accent-ink:#fff;--accent-text:#c40b27;
  --gut:clamp(20px,5vw,56px);--maxw:1040px;
  --r-tile:18.4%;--r-ui:10px;--bar:60px;
}
*{box-sizing:border-box;margin:0}
html{-webkit-text-size-adjust:100%}
body{font-family:"Albert Sans",system-ui,sans-serif;color:var(--ink);background:var(--paper);font-size:1.0625rem;line-height:1.55;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit}
code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.84em;background:var(--mist);padding:.1em .4em;border-radius:5px;overflow-wrap:anywhere}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;background:#fff;color:#000;padding:10px 14px;border-radius:8px;z-index:100}
.skip:focus{top:12px}

/* top bar */
.bar{position:relative;height:var(--bar);background:#000;color:#f2f2f2;display:flex;align-items:center;gap:20px;padding:0 var(--gut)}
.bar-id{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:700;letter-spacing:-.01em;white-space:nowrap;flex:none}
.bar-id img{border-radius:var(--r-tile)}
.switch{display:flex;gap:8px;margin-left:auto;overflow-x:auto;padding:6px 2px;scrollbar-width:none}
.switch::-webkit-scrollbar{display:none}
.chip{--c:#fff;flex:none;width:30px;height:30px;border-radius:var(--r-tile);background:var(--c);border:2px solid transparent;cursor:pointer;padding:0;position:relative;transition:transform .15s}
.chip[data-slug=core]{background:#000;border-color:#5a5a60}
.chip[data-slug=waypoint]{background:#f2f2f2}
.chip[aria-checked=true]{outline:2px solid #fff;outline-offset:3px;transform:scale(1.08)}
.chip:hover{transform:scale(1.12)}
.chip:focus-visible{outline:3px solid #fff;outline-offset:3px}

/* contents strip */
.toc{background:var(--paper);border-bottom:1px solid var(--line)}
.toc ol{list-style:none;display:flex;gap:4px;padding:0 var(--gut);overflow-x:auto;scrollbar-width:none}
.toc ol::-webkit-scrollbar{display:none}
.toc a{display:block;padding:12px 12px;text-decoration:none;font-size:.9rem;font-weight:600;white-space:nowrap;color:var(--mute);border-bottom:3px solid transparent}
.toc a:hover{color:var(--ink)}
.toc a.on{color:var(--ink);border-bottom-color:var(--accent)}

/* hero */
.hero,.chooser{--accent:var(--hero-accent);--accent-ink:var(--hero-ink)}
.hero{background:#000;color:#f2f2f2;padding:clamp(48px,9vw,120px) var(--gut) clamp(48px,8vw,100px);display:grid;grid-template-columns:minmax(0,1fr) auto;gap:clamp(24px,5vw,80px);align-items:center;min-height:min(78vh,760px)}
.hero h1{font-size:clamp(2.6rem,9.2vw,8rem);line-height:1;font-weight:300;letter-spacing:.29em;margin-right:-.29em}
.hero-type{min-width:0}
.hero .wm{display:block}
.hero .sw{display:block;font-size:.68em;font-weight:900;letter-spacing:.2em;color:var(--hero-accent,var(--accent));margin-top:.12em;min-height:1em;transition:opacity .25s,transform .25s}
.hero .sw.swap{opacity:0;transform:translateY(.2em)}
.hero .sw:empty{display:none}
.hero .lede{max-width:34ch;font-size:clamp(1.05rem,2.2vw,1.35rem);margin-top:clamp(24px,4vw,44px);color:#c9c9d0}
.hero-mark img{width:clamp(150px,26vw,340px);height:auto;transition:transform .35s cubic-bezier(.2,.8,.2,1)}
.hero-mark img.swap{transform:scale(.9) rotate(-4deg)}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.cta.tight{margin-top:16px}
.btn{display:inline-flex;align-items:center;min-height:46px;padding:0 20px;border-radius:var(--r-ui);font:inherit;font-weight:700;font-size:.97rem;text-decoration:none;cursor:pointer;border:2px solid transparent}
.btn.solid{background:var(--accent);color:var(--accent-ink)}
.btn.solid:hover{filter:brightness(1.08)}
.btn.ghost{border-color:currentColor;background:transparent}
.btn.ghost:hover{background:rgba(127,127,127,.15)}
.hero .btn.ghost{color:#f2f2f2}
.sec .btn.ghost{color:var(--ink)}

/* sections */
.sec{width:min(var(--maxw),100% - 2*var(--gut));margin:0 auto;padding:clamp(56px,9vw,112px) 0 0}
.sec:last-of-type{padding-bottom:clamp(56px,9vw,112px)}
h2{font-size:clamp(1.9rem,4.6vw,3.2rem);line-height:1.06;font-weight:800;letter-spacing:-.02em;max-width:20ch}
h3{font-size:1.2rem;font-weight:700;letter-spacing:-.01em}
h3.sub{margin-top:clamp(36px,5vw,56px)}
.intro{max-width:62ch;margin-top:14px;color:#33333a}
.note{max-width:66ch;margin-top:18px;font-size:.92rem;color:var(--mute)}
.hint{font-size:.92rem;color:var(--mute);margin-top:4px;max-width:60ch}

/* family */
.family{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:0;margin-top:36px;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.fam{border:0;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:none;font:inherit;text-align:left;cursor:pointer;padding:22px 20px 16px;display:flex;flex-direction:column;gap:18px;align-items:flex-start;position:relative}
.fam img{height:92px;width:auto;max-width:100%}
.fam span{font-weight:700}
.fam::after{content:"";position:absolute;left:0;right:0;bottom:0;height:5px;background:var(--c,#000);transform:scaleX(0);transform-origin:left;transition:transform .25s}
.fam:hover::after,.fam[aria-pressed=true]::after{transform:scaleX(1)}

/* anatomy */
.anatomy{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:clamp(28px,6vw,80px);align-items:center;margin-top:36px}
.anat-fig{position:relative;background:var(--mist);border-radius:16px;padding:clamp(28px,6vw,64px) clamp(40px,8vw,80px);display:grid;place-items:center}
.anat-fig img{width:min(100%,300px);height:auto}
.pin{position:absolute;right:14px;top:var(--y);transform:translateY(-50%);width:26px;height:26px;border-radius:50%;background:#000;color:#fff;font-size:.8rem;font-weight:800;display:grid;place-items:center;transition:background .15s,transform .15s}
.pin.hot{background:var(--accent);color:var(--accent-ink);transform:translateY(-50%) scale(1.25)}
.parts{display:grid;gap:0}
.parts div{padding:16px 16px 16px 18px;border-left:4px solid var(--line);transition:border-color .15s,background .15s}
.parts div.hot{border-left-color:var(--accent);background:var(--mist)}
.parts dt{font-weight:700;margin-bottom:2px}
.parts dd{font-size:.97rem;color:#33333a}

/* explorer */
.explore{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;margin-top:32px}
.controls{display:grid;gap:14px}
fieldset{border:0;padding:0;min-width:0}
legend{font-weight:700;font-size:.92rem;margin-bottom:6px;padding:0}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg button{font:inherit;font-weight:600;font-size:.92rem;min-height:40px;padding:0 14px;border-radius:var(--r-ui);border:1.5px solid var(--line);background:var(--paper);cursor:pointer;color:var(--ink)}
.seg button:hover{border-color:#999}
.seg button[aria-pressed=true]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.seg button:disabled{opacity:.38;cursor:not-allowed}
.stage{--stage:#fff;background:var(--stage);border:1px solid var(--line);border-radius:16px;min-height:clamp(260px,42vw,420px);display:grid;place-items:center;padding:clamp(24px,5vw,56px);transition:background .25s}
.stage img{max-width:min(78%,560px);max-height:clamp(150px,26vw,280px);width:auto;height:auto}
.stage.dark{--stage:#000;border-color:#000}
.dl{display:grid;gap:0;border-top:1px solid var(--line)}
.dl a,.dl button.row{display:grid;grid-template-columns:70px 1fr auto;gap:14px;align-items:baseline;padding:13px 6px;border:0;border-bottom:1px solid var(--line);background:none;font:inherit;text-align:left;text-decoration:none;cursor:pointer;color:inherit}
.dl a:hover,.dl button.row:hover{background:var(--mist)}
.dl b{font-weight:800}
.dl .fn{font-size:.85rem;color:var(--mute);overflow-wrap:anywhere}
.dl .sz{font-size:.88rem;color:var(--mute);white-space:nowrap}
.dl a.missing{display:none}
@media(min-width:900px){
  .explore{grid-template-columns:minmax(0,5fr) minmax(0,6fr);grid-template-areas:"c s" "d s";align-items:start;gap:28px 40px}
  .controls{grid-area:c}.stage{grid-area:s}.dl{grid-area:d}
}

/* internal / external */
.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(24px,5vw,64px);margin-top:36px}
.rule{padding-top:18px;border-top:4px solid var(--accent)}
.rule p{margin-top:8px;color:#33333a}
.icons{display:grid;grid-template-columns:repeat(auto-fill,minmax(54px,1fr));gap:12px;margin-top:22px}
.icons button{border:0;background:none;padding:6px;cursor:pointer;border-radius:12px;display:grid;place-items:center;aspect-ratio:1}
.icons button[aria-pressed=true]{background:var(--mist)}
.icons img{width:100%;max-width:54px;height:auto}
.chooser{margin-top:clamp(40px,6vw,72px);background:#000;color:#f2f2f2;border-radius:20px;padding:clamp(22px,4vw,44px)}
.chooser h3{font-size:1.5rem}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chips button{font:inherit;font-weight:600;min-height:42px;padding:0 16px;border-radius:999px;border:1.5px solid #4a4a52;background:none;color:#f2f2f2;cursor:pointer}
.chips button:hover{border-color:#bbb}
.chips button[aria-selected=true]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.answer{margin-top:26px;display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(18px,4vw,40px);align-items:center}
.answer .pick{width:clamp(88px,16vw,140px);height:clamp(88px,16vw,140px);display:grid;place-items:center;background:#f2f2f2;border-radius:14px}
.answer .pick img{max-width:80%;max-height:80%}
.answer h4{font-size:1.25rem;font-weight:800;letter-spacing:-.01em}
.answer p{color:#c9c9d0;margin-top:4px;max-width:56ch}
.answer .cta{margin-top:14px}
.answer .btn.ghost{color:#f2f2f2}
@media(max-width:640px){.answer{grid-template-columns:minmax(0,1fr)}}

/* colour */
.swatches{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-top:30px}
.sw-i{border:0;border-radius:16px;min-height:188px;padding:18px;display:flex;flex-direction:column;justify-content:flex-end;gap:2px;text-align:left;font:inherit;cursor:pointer;position:relative}
.sw-i.edge{box-shadow:inset 0 0 0 1px var(--line)}
.sw-i b{font-size:1.2rem;letter-spacing:-.01em}
.sw-i .hex{font-size:1.65rem;font-weight:800;letter-spacing:-.01em}
.sw-i small{font-size:.82rem;opacity:.9;line-height:1.4}
.sw-i .copied{position:absolute;right:14px;top:14px;font-size:.8rem;font-weight:700;opacity:0;transition:opacity .2s}
.sw-i.did .copied{opacity:1}
.swatches.small{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.swatches.small .sw-i{min-height:120px}

/* type */
.specimen{margin-top:30px;background:var(--mist);border-radius:20px;padding:clamp(22px,4vw,44px);display:grid;gap:18px}
.spec-in input{font:inherit;font-size:1rem;padding:10px 14px;border:1.5px solid #c9c9ce;border-radius:var(--r-ui);width:min(100%,360px);background:#fff}
.spec-out{font-size:clamp(3rem,13vw,8.5rem);line-height:1.02;letter-spacing:-.02em;font-weight:700;overflow-wrap:anywhere}
.spec-w{display:grid;gap:6px;max-width:420px;font-weight:600;font-size:.92rem}
.spec-w input{width:100%;accent-color:var(--accent)}
.alpha{font-size:1.15rem;color:#33333a;line-height:1.6;margin-top:8px}
.tbl{width:100%;border-collapse:collapse;margin-top:26px;font-size:.97rem}
.tbl th,.tbl td{text-align:left;padding:13px 14px 13px 0;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{font-size:.88rem;font-weight:700;color:var(--mute)}
.tbl td:first-child{font-weight:600;width:38%}
.tbl-wrap{overflow-x:auto}
.mins .tbl td:first-child{width:auto}

/* space */
.space{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(24px,5vw,64px);margin-top:30px;align-items:start}
.clear p{margin-top:8px;color:#33333a}
.clear-fig{margin-top:22px;background:var(--mist);border-radius:16px;padding:clamp(18px,4vw,36px);display:grid;place-items:center}
.clear-box{--x:16.45%;position:relative;width:min(100%,300px);background:#fff;outline:1px dashed #e0245e;padding:var(--x)}
.clear-box::before{content:"";position:absolute;inset:0;background:rgba(224,36,94,.08);pointer-events:none}
.clear-box img{width:100%;height:auto;position:relative}
.clear-box .x{position:absolute;font-size:.75rem;font-weight:800;color:#e0245e;background:#fff;padding:0 4px;border-radius:3px}
.bgs{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px;margin-top:26px}
.bgs figure{border-radius:14px;min-height:150px;display:grid;place-items:center;padding:20px 16px 34px;position:relative;border:1px solid var(--line)}
.bgs img{max-height:84px;max-width:80%;width:auto}
.bgs figcaption{position:absolute;left:14px;bottom:10px;font-size:.8rem;font-weight:600}

/* don'ts */
.donts{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin-top:30px}
.dont{border:1px solid var(--line);border-radius:14px;min-height:190px;display:grid;place-items:center;position:relative;overflow:hidden;padding:20px 16px 38px}
.dont img{max-height:96px;max-width:70%;width:auto}
.dont .no{position:absolute;right:10px;top:10px;width:26px;height:26px;border-radius:50%;background:#e0245e;color:#fff;font-weight:800;display:grid;place-items:center;font-size:.85rem}
.dont figcaption{position:absolute;left:14px;bottom:10px;font-size:.85rem;font-weight:600}

/* favicons */
.fav{margin-top:30px;background:var(--mist);border-radius:20px;padding:clamp(20px,4vw,36px);display:grid;gap:26px}
.fav-tabs{display:flex;gap:6px;flex-wrap:wrap;align-items:flex-end}
.tab{display:flex;align-items:center;gap:10px;background:#fff;padding:10px 16px;border-radius:12px 12px 0 0;font-size:.85rem;font-weight:600;min-width:170px}
.tab:last-child{background:#dcdce0}
.fav-sizes{display:flex;flex-wrap:wrap;gap:clamp(14px,3vw,28px);align-items:flex-end}
.fav-sizes figure{display:grid;gap:8px;justify-items:start;font-size:.8rem;color:var(--mute)}
.fav-sizes .pair{display:flex;gap:10px;align-items:flex-end}
.code{margin-top:14px;background:#000;color:#e9e9ee;padding:18px;border-radius:14px;font-size:.8rem;line-height:1.7;overflow-x:auto;font-family:ui-monospace,Menlo,Consolas,monospace}

/* packs */
.packs{display:grid;gap:0;margin-top:30px;border-top:1px solid var(--line)}
.pack{display:grid;grid-template-columns:34px minmax(0,1fr) auto;gap:16px;align-items:center;padding:14px 4px;border-bottom:1px solid var(--line)}
.pack i{width:34px;height:34px;border-radius:var(--r-tile);background:var(--c,#000)}
.pack b{display:block}
.pack small{color:var(--mute);font-size:.88rem}
.pack .btn{min-height:40px;padding:0 16px}
.pack.cur{background:var(--mist)}
.packs a.missing{display:none}
@media(max-width:560px){.pack{grid-template-columns:34px minmax(0,1fr)}.pack .btn{grid-column:1/-1;justify-content:center}}

.foot{width:min(var(--maxw),100% - 2*var(--gut));margin:0 auto;padding:36px 0 56px;border-top:1px solid var(--line);display:flex;gap:16px;align-items:center;color:var(--mute);font-size:.9rem}
.foot img{border-radius:var(--r-tile);flex:none}

.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:#000;color:#fff;padding:12px 18px;border-radius:12px;font-weight:600;font-size:.92rem;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:60}
.toast.on{opacity:1;transform:translate(-50%,0)}

@media(max-width:820px){
  .anatomy,.two,.space{grid-template-columns:minmax(0,1fr)}
  .hero{grid-template-columns:minmax(0,1fr);min-height:0}
  .hero-mark{order:-1}
  .hero-mark img{width:120px}
  .bar-id span{display:none}
}
@media(max-width:560px){
  .bar{gap:12px}
  .chip{width:26px;height:26px}.switch{gap:6px}
  .swatches,.swatches.small{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .sw-i{min-height:150px;padding:14px}.sw-i .hex{font-size:1.25rem}.sw-i b{font-size:1rem}
  .dl a,.dl button.row{grid-template-columns:54px 1fr auto;gap:10px}
  .dl .fn{grid-column:2/-1;grid-row:2}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
}