@font-face{font-family:"Literata";src:url(fonts/literata-latin.woff2) format("woff2");font-weight:200 900;font-display:swap;unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191-2199,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Literata";src:url(fonts/literata-latin-ext.woff2) format("woff2");font-weight:200 900;font-display:swap;unicode-range:U+0100-02AF,U+0304,U+0308,U+0329,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Plex";src:url(fonts/ibmplexsans-400-lat.woff2) format("woff2");font-weight:400;font-display:swap;unicode-range:U+0000-00FF,U+2000-206F,U+2190-2199,U+2212}
@font-face{font-family:"Plex";src:url(fonts/ibmplexsans-400-ext.woff2) format("woff2");font-weight:400;font-display:swap;unicode-range:U+0100-02AF,U+1E00-1EFF}
@font-face{font-family:"Plex";src:url(fonts/ibmplexsans-600-lat.woff2) format("woff2");font-weight:600;font-display:swap;unicode-range:U+0000-00FF,U+2000-206F,U+2190-2199,U+2212}
@font-face{font-family:"Plex";src:url(fonts/ibmplexsans-600-ext.woff2) format("woff2");font-weight:600;font-display:swap;unicode-range:U+0100-02AF,U+1E00-1EFF}

:root{
  --bg:#f3ecdc;--paper:#faf5e8;--ink:#241d12;--mut:#5f563f;--line:#d2c4a1;
  --moss:#435f39;--moss-deep:#33482c;--amber:#9a4a16;--gold:#435f39;--gold-soft:#7d8f6a;
  --focus:#33482c;--bar:rgba(243,236,220,.92);
  --bone:#6b5a3e;--velvet:#7c6a52;--rose:#8a7a5c;
  --st-cast:#8d8574;--st-velvet:#7c6a52;--st-clean:#b08d4f;--st-rut:#9a4a16;--st-carry:#5f6e5a;
  --serif:"Literata",Georgia,serif;--sans:"Plex",system-ui,-apple-system,"Segoe UI",sans-serif;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#14120d;--paper:#1f1b13;--ink:#f0e7d2;--mut:#b3a586;--line:#3d3524;
  --moss:#a4bd8d;--moss-deep:#c4d6ab;--amber:#e09a5a;--gold:#a4bd8d;--gold-soft:#6e7f57;
  --focus:#d8e6bd;--bar:rgba(20,18,13,.92);
  --bone:#d9c9a3;--velvet:#a89880;--rose:#a89880;
  --st-cast:#8d8574;--st-velvet:#a89880;--st-clean:#d9b96a;--st-rut:#e09a5a;--st-carry:#8ba07f;
  color-scheme:dark;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#14120d;--paper:#1f1b13;--ink:#f0e7d2;--mut:#b3a586;--line:#3d3524;
  --moss:#a4bd8d;--moss-deep:#c4d6ab;--amber:#e09a5a;--gold:#a4bd8d;--gold-soft:#6e7f57;
  --focus:#d8e6bd;--bar:rgba(20,18,13,.92);
  --bone:#d9c9a3;--velvet:#a89880;--rose:#a89880;
  --st-cast:#8d8574;--st-velvet:#a89880;--st-clean:#d9b96a;--st-rut:#e09a5a;--st-carry:#8ba07f;
  color-scheme:dark;
}}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.08rem/1.62 var(--serif);font-optical-sizing:auto;overflow-x:clip}
[hidden]{display:none !important}
a{color:var(--moss-deep);text-underline-offset:.15em}
:root[data-theme="dark"] a{color:var(--moss)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) a{color:var(--moss)}}
a:focus-visible,button:focus-visible,select:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
h1,h2,h3{font-family:var(--serif);line-height:1.12;margin:0 0 .5em}
h2{font-size:clamp(1.9rem,4.2vw,3rem);font-weight:600;letter-spacing:-.01em}
h2 .anchor{color:inherit;text-decoration:none}
h3{font-size:1.2rem;font-weight:650}
p{margin:0 0 1em}
.skip{position:absolute;left:-999px;top:0}.skip:focus{left:8px;top:8px;z-index:60;background:var(--paper);padding:.4em .8em}
section{scroll-margin-top:52px;padding:clamp(3rem,8vw,6rem) clamp(16px,5vw,64px);max-width:1280px;margin:0 auto}
.lede{font-size:1.18rem;max-width:40em;color:var(--ink)}
figcaption{font:400 .82rem/1.45 var(--sans);color:var(--mut);margin-top:.55em}
figure{margin:0}
.note{font:400 .88rem/1.5 var(--sans);color:var(--mut);margin-top:1.6rem}
img{height:auto}

/* topbar */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:.9rem;height:46px;padding:0 clamp(12px,3vw,28px);background:var(--bar);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line);font:400 .9rem/1 var(--sans);white-space:nowrap}
.topbar a{color:var(--ink);text-decoration:none}
.home{font-weight:600;display:inline-flex;align-items:center;gap:.45em}
.topnav{display:flex;gap:1rem;overflow-x:auto;scrollbar-width:none;min-width:0}
.topnav::-webkit-scrollbar{display:none}
.topnav a{color:var(--mut);padding:.35em 0}
.topnav a[aria-current="true"]{color:var(--ink);box-shadow:inset 0 -2px var(--moss)}
.spacer{flex:1}
.chip{border:1px solid var(--line);border-radius:999px;padding:.35em .8em}
.icon-btn{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--ink);display:grid;place-items:center;cursor:pointer;padding:0;flex:none}
.icon-btn svg{display:block}.icon-btn svg[hidden]{display:none}
@media (max-width:560px){.home span{display:none}.topnav{gap:.8rem}}

/* progress hairline (antler-rose marker) + reading rail */
.progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:40;pointer-events:none}
.progress .hair{position:absolute;inset:0;background:var(--moss);transform:scaleX(0);transform-origin:0 50%}
.progress .bee{position:absolute;top:-4.5px;width:11px;height:11px;margin-left:-5.5px;border-radius:50%;background:var(--bg);border:2.5px solid var(--amber)}
.rail{position:fixed;right:14px;top:50%;transform:translateY(-50%);z-index:29;display:flex;flex-direction:column;gap:.55rem}
.rail a{position:relative;width:26px;height:26px;display:grid;place-items:center;text-decoration:none}
.rail a i{width:9px;height:9px;border-radius:50%;background:transparent;border:2px solid var(--mut);display:block}
.rail a[aria-current="true"] i{background:var(--moss);border-color:var(--moss)}
.rail a::after{content:attr(aria-label);position:absolute;right:30px;top:50%;transform:translateY(-50%);font:400 .78rem var(--sans);color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:.25em .7em;white-space:nowrap;opacity:0;pointer-events:none}
.rail a:hover::after,.rail a:focus-visible::after{opacity:1}
@media (max-width:79.99rem){.rail{display:none}}

/* hero */
.hero{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.5rem,5vw,4rem);align-items:center;min-height:calc(100svh - 46px);padding-top:clamp(1.5rem,4vw,3rem)}
.kicker{font:600 .8rem/1.3 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--moss-deep);margin-bottom:1.1em}
:root[data-theme="dark"] .kicker{color:var(--moss)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .kicker{color:var(--moss)}}
h1{font-size:clamp(2.7rem,7vw,5.6rem);font-weight:700;letter-spacing:-.025em;line-height:.98;margin-bottom:.35em}
.deck{font-size:clamp(1.12rem,1.9vw,1.4rem);line-height:1.5;max-width:31em}
.cta{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.2em}
.start{display:inline-flex;align-items:center;gap:.5em;font:600 1rem/1 var(--sans);color:#fff;background:#33482c;text-decoration:none;padding:.85em 1.25em;border-radius:999px;min-height:44px;border:0;cursor:pointer}
:root[data-theme="dark"] .start{background:var(--moss);color:#14120d}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .start{background:var(--moss);color:#14120d}}
.ghost{display:inline-flex;align-items:center;font:600 1rem/1 var(--sans);color:var(--ink);background:transparent;border:1.5px solid var(--line);border-radius:999px;padding:.85em 1.25em;min-height:44px;text-decoration:none;cursor:pointer}
.hero-fig .hero-stage{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:1rem}
.hero-fig .antler{width:min(100%,calc(64svh));height:auto;margin:0 auto;display:block}
.hero-src{font:400 .82rem var(--sans);color:var(--mut);margin-top:.9em}
@media (max-width:820px){.hero{grid-template-columns:1fr;min-height:0}.hero-fig .antler{width:min(100%,calc(40svh))}}

/* antler drawings (hero, sticky stages, growth scene) */
.antler .ant-beam,.antler .ant-tine{fill:none;stroke:var(--bone);stroke-linecap:round}
.antler .ant-beam{stroke-width:10}
.antler .ant-tine{stroke-width:7}
.antler .ant-rose{fill:none;stroke:var(--rose);stroke-width:4}
.antler .velvet .ant-beam,.antler .velvet .ant-tine{stroke:var(--velvet)}
.antler .tone-rut .ant-beam,.antler .tone-rut .ant-tine{stroke:var(--st-rut)}
.antler .tone-carry .ant-beam,.antler .tone-carry .ant-tine{stroke:var(--st-carry)}
.scale-scene{display:block;width:100%;height:auto;background:var(--paper);border:1px solid var(--line);border-radius:12px}
.scale-scene .ground{stroke:var(--mut);stroke-width:1.5}
.scale-scene #person{fill:var(--moss);opacity:.85}
.scale-scene .plab{font:600 11px var(--sans);fill:var(--mut);font-variant-numeric:tabular-nums}
.scale-scene .ant-beam,.scale-scene .ant-tine{fill:none;stroke:var(--bone);stroke-linecap:round}
.scale-scene .ant-beam{stroke-width:10}
.scale-scene .ant-tine{stroke-width:7}
.scale-scene .ant-rose{fill:none;stroke:var(--rose);stroke-width:4}
.scale-scene .velvet .ant-beam,.scale-scene .velvet .ant-tine{stroke:var(--velvet)}
.scale-scene .tone-rut .ant-beam,.scale-scene .tone-rut .ant-tine{stroke:var(--st-rut)}
.scale-scene .tone-carry .ant-beam,.scale-scene .tone-carry .ant-tine{stroke:var(--st-carry)}
.scale-scene .sh-line{stroke:var(--amber);stroke-width:1.2;stroke-dasharray:6 4}
.scale-scene .sh-lab{font:600 11px var(--sans);fill:var(--amber)}
.scale-scene .ticks line{stroke:var(--mut);stroke-width:1}
.scale-scene .ticks text{font:400 10px var(--sans);fill:var(--mut);font-variant-numeric:tabular-nums}

/* share */
.share{display:flex;align-items:center;flex-wrap:wrap;gap:.6rem 1rem;padding-top:0;padding-bottom:0}
.share-label{font:400 .85rem var(--sans);color:var(--mut)}
.share-row{display:flex;gap:.5rem}
.sh{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--ink);display:grid;place-items:center;cursor:pointer;padding:0;text-decoration:none}
.sh:hover,.sh:focus-visible{border-color:var(--moss);color:var(--moss)}
@media (pointer:coarse){.sh{width:44px;height:44px}}
.copy-note{font:400 .85rem var(--sans);color:var(--mut);min-height:1.2em}

/* look (bone section) */
.photofig{margin:1.6rem 0 .5rem}
.photofig img{display:block;width:min(100%,560px);height:auto;border-radius:10px}
.cgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:1.2rem;margin-top:1.6rem}
.cause{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:1.3rem 1.4rem}
.cause p{max-width:34em;margin-bottom:0}

/* year: scrolly steps driving the sticky antler */
.journey-cols{display:grid;grid-template-columns:7fr 5fr;gap:clamp(1.5rem,4vw,3rem);align-items:start}
.map-wrap{position:sticky;top:56px}
.simfig .antler{display:block;width:min(100%,52svh);height:auto;margin:0 auto;background:var(--paper);border:1px solid var(--line);border-radius:12px}
.simread{font:600 1.25rem var(--serif);font-variant-numeric:tabular-nums;color:var(--ink);margin-top:.6em;min-height:1.4em}
.spanote{font:400 .82rem/1.45 var(--sans);color:var(--mut)}
.steps{display:grid;gap:1.2rem}
.step{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:1.2rem 1.3rem 1rem;scroll-margin-top:70px}
.step.on{border-color:var(--moss);box-shadow:0 0 0 1px var(--moss)}
@media (min-width:821px){.step{opacity:.55}.step.on{opacity:1}}
.wk{font:600 .8rem/1.4 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--moss-deep);margin-bottom:.6em;font-variant-numeric:tabular-nums}
:root[data-theme="dark"] .wk{color:var(--moss)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .wk{color:var(--moss)}}
.stepbtns{display:flex;flex-wrap:wrap;gap:.6rem;margin:.9em 0 0}
.stepbtns .ghost{font-size:.9rem;padding:.6em 1em;min-height:44px}
.statics{display:grid;gap:1.6rem;margin-top:1.6rem}
.statics .antler{width:min(100%,420px)}

/* growth simulator */
.simfree{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(1.5rem,4vw,3rem);align-items:start;margin-top:1.6rem}
.controls{font:400 1rem var(--sans)}
.crow{display:flex;flex-wrap:wrap;gap:.6rem .8rem;align-items:center;margin:0 0 1.1em}
.crow label{font-weight:600}
input[type="range"]{accent-color:var(--moss);width:min(100%,20em);min-height:44px}
output{font-variant-numeric:tabular-nums;font-weight:600;min-width:6.2em}
#height{font:400 1.1rem var(--sans);color:var(--ink);background:var(--paper);border:1.5px solid var(--line);border-radius:8px;padding:.6em .8em;min-height:44px;width:6em;font-variant-numeric:tabular-nums}
.stable{border-collapse:collapse;font:400 .95rem/1.5 var(--sans);margin-top:1.4rem}
.stable caption{text-align:left;font-weight:600;margin-bottom:.6em}
.stable th,.stable td{border:1px solid var(--line);padding:.45em .8em;text-align:left;font-variant-numeric:tabular-nums}
.verdict{font-size:1.25rem;max-width:36em;font-weight:500;border-left:4px solid var(--moss);padding-left:1rem;margin-top:1.4rem}

/* cumulative chart (inline SVG, no inline styles) */
.chart{display:block;width:min(100%,640px);height:auto;margin:1.2rem 0 1.6rem}
.chart text{font:400 13px var(--sans);fill:var(--ink)}
.chart .cv{font-weight:600;font-variant-numeric:tabular-nums}
.chart .cm{fill:var(--mut)}
.chart .cbar{stroke:none}
.chart .st-cast{fill:var(--st-cast)}.chart .st-velvet{fill:var(--st-velvet)}
.chart .st-clean{fill:var(--st-clean)}.chart .st-rut{fill:var(--st-rut)}
.chart .st-carry{fill:var(--st-carry)}
.rev p,.rut p,.ro p{max-width:40em}
.chips{list-style:none;padding:0;margin:0 0 1.6rem;display:grid;gap:.7rem;max-width:44em}
.chips li{font:400 .98rem/1.5 var(--sans);background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:.8em 1.1em}
.ro-end{font-size:1.15rem;border-left:4px solid var(--moss);padding-left:1rem;max-width:36em}

/* quiz + guesses */
.guess{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:1.2rem 1.3rem;margin:1.6rem 0;max-width:44em}
.qlist{display:grid;gap:1.2rem;margin-top:1.4rem}
.q{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:1.2rem 1.3rem;scroll-margin-top:70px}
.qq{font-size:1.1rem;font-weight:600}
.qn{display:inline-grid;place-items:center;width:1.7em;height:1.7em;border-radius:50%;background:var(--moss-deep);color:#fff;font:600 .85rem var(--sans);margin-right:.5em}
:root[data-theme="dark"] .qn{background:var(--moss);color:#14120d}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .qn{background:var(--moss);color:#14120d}}
.opts{list-style:none;padding:0;margin:.8em 0 0;display:grid;gap:.5rem}
.opt{font:400 1rem var(--sans);color:var(--ink);background:transparent;border:1.5px solid var(--line);border-radius:8px;padding:.7em 1em;min-height:44px;cursor:pointer;text-align:left;width:100%}
.opt.picked{border-color:var(--moss)}
.opt.right{border-color:#2e7d43;background:rgba(46,125,67,.12)}
.opt.wrong{border-color:#b3261e;background:rgba(179,38,30,.10)}
.qfb{font:400 .92rem var(--sans);margin:.7em 0 0}
.score{font:600 1.2rem var(--serif);min-height:1.6em}
.rank{font:600 1.05rem var(--serif);color:var(--moss-deep);min-height:1.4em}
:root[data-theme="dark"] .rank{color:var(--moss)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .rank{color:var(--moss)}}
.qkey{font:400 .95rem var(--sans);color:var(--mut)}

/* faq */
.qalist{display:grid;gap:.7rem;margin-top:1.4rem;max-width:44em}
.qa{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:1rem 1.2rem}
.qa summary{cursor:pointer;font-weight:600;font-size:1.05rem;min-height:44px;display:flex;align-items:center}
.qa p{margin:.6em 0 0}

/* method + sources + footer */
.method p,.src p{max-width:52em}
.src{font:400 .95rem/1.6 var(--sans);color:var(--mut)}
.src h2,.src h3{color:var(--ink)}
.sgroup{margin-bottom:1.4rem}
.sgroup ul{padding-left:1.2em;margin:.4em 0}
.sgroup li{margin-bottom:.3em}
.src a,.method p{overflow-wrap:anywhere}
.foot{padding:2rem clamp(16px,5vw,64px) 3rem;font:400 .85rem var(--sans);color:var(--mut);border-top:1px solid var(--line);max-width:1280px;margin:0 auto}
.foot a{color:var(--mut)}
.nf main{max-width:40em;margin:20vh auto;padding:0 16px}

/* no-JS: everything readable, dead controls hidden */
html:not(.has-js) .guess .opts,html:not(.has-js) #controls,html:not(.has-js) .stepbtns{display:none}
html:not(.has-js) .step{opacity:1}

@media (max-width:820px){
  .journey-cols,.simfree{grid-template-columns:1fr}
  .map-wrap{top:46px}
  .map-wrap .simfig .antler{width:min(100%,30svh)}
  .map-wrap .simread{font-size:1.05rem;min-height:1.2em}
  .step{position:relative;z-index:2;scroll-margin-top:calc(46px + 30svh + 64px)}
}
@media (min-width:821px) and (max-width:1180px){.journey-cols{grid-template-columns:1fr 1fr}}
@media (max-width:560px){
  section{scroll-margin-top:60px}
  .chart text{font-size:11px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important}
}