@font-face{font-family:"Fraunces";src:url("fonts/Fraunces-display.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"Atkinson";src:url("fonts/AtkinsonHyperlegibleNext.woff2") format("woff2");font-weight:100 900;font-display:swap}

/* Unbleached linen by day; a dark umber ground by night, the colour of a toned canvas before the
   first stroke. The accent is a burnt red close to an earth pigment. */
:root{
  --paper:#f1eadc; --surface:#e8dfcd; --surface-2:#ddd2bc;
  --ink:#1d1812; --ink-2:#3a3128; --ink-3:#4a4036;
  --rule:#cfc3ab; --rule-strong:#9c8f78;
  --accent:#7d2413; --accent-2:#a33a22;
  --thread:rgba(95,72,40,.055); --thread-2:rgba(255,255,255,.22);
  --frame:#2a2016; --frame-hi:#5a4632;
  --photo-bg:#1c1712;
  --focus:#1b4a8a;
  --shadow:0 1px 2px rgba(40,28,14,.12),0 14px 34px rgba(40,28,14,.12);
  --maxw:78rem; --measure:36rem; --bar:3.25rem; --r:10px;
}
:root[data-theme="dark"]{
  --paper:#17110c; --surface:#211912; --surface-2:#2b2118;
  --ink:#f4ede2; --ink-2:#d8cdbd; --ink-3:#c3b6a3;
  --rule:#3a2e22; --rule-strong:#5f4f3d;
  --accent:#f2a58e; --accent-2:#e98a6f;
  --thread:rgba(255,235,205,.022); --thread-2:rgba(0,0,0,.25);
  --frame:#0b0805; --frame-hi:#3a2c1e;
  --photo-bg:#0a0806;
  --focus:#8fc0ff;
  --shadow:0 1px 2px rgba(0,0,0,.5),0 14px 34px rgba(0,0,0,.4);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#17110c; --surface:#211912; --surface-2:#2b2118;
    --ink:#f4ede2; --ink-2:#d8cdbd; --ink-3:#c3b6a3;
    --rule:#3a2e22; --rule-strong:#5f4f3d;
    --accent:#f2a58e; --accent-2:#e98a6f;
    --thread:rgba(255,235,205,.022); --thread-2:rgba(0,0,0,.25);
    --frame:#0b0805; --frame-hi:#3a2c1e;
    --photo-bg:#0a0806;
    --focus:#8fc0ff;
    --shadow:0 1px 2px rgba(0,0,0,.5),0 14px 34px rgba(0,0,0,.4);
  }
}

*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}
html:not(.js) .q-why[hidden]{display:block !important}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; color:var(--ink);
  background-color:var(--paper);
  /* The weave of the canvas, faint enough to read over. */
  background-image:
    repeating-linear-gradient(0deg,var(--thread) 0 1px,transparent 1px 3px),
    repeating-linear-gradient(90deg,var(--thread-2) 0 1px,transparent 1px 3px);
  font-family:"Atkinson",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:clamp(1rem,.96rem + .2vw,1.09rem); line-height:1.62;
  overflow-x:clip;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{color:var(--accent-2)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:.6rem;
  min-height:var(--bar);padding:0 clamp(.75rem,2vw,1.4rem);line-height:1;
  background:color-mix(in srgb,var(--paper) 90%,transparent);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--rule);
}
.topbar .home{font-family:"Fraunces",Georgia,serif;font-weight:600;color:var(--ink);
  text-decoration:none;white-space:nowrap;font-size:.95rem;display:flex;align-items:center;min-height:2.75rem}
.topnav{display:flex;gap:.85rem;overflow-x:auto;scrollbar-width:none;min-width:0}
.topnav::-webkit-scrollbar{display:none}
.topnav a{color:var(--ink-2);text-decoration:none;white-space:nowrap;font-size:.9rem;display:flex;align-items:center;min-height:2.75rem}
.topnav a:hover,.topnav a[aria-current="true"]{color:var(--accent)}
.topnav a[aria-current="true"]{box-shadow:inset 0 -2px 0 var(--accent)}
.spacer{flex:1 1 auto}
.chip{color:var(--ink-2);text-decoration:none;font-size:.85rem;white-space:nowrap;
  border:1px solid var(--rule);border-radius:999px;padding:.25rem .6rem;display:flex;align-items:center;min-height:2.75rem}
.chip:hover{border-color:var(--accent)}
.icon-btn{display:grid;place-items:center;width:2.1rem;height:2.1rem;flex:0 0 auto;
  border:1px solid var(--rule);border-radius:999px;background:transparent;color:var(--ink-2);cursor:pointer;position:relative}
.icon-btn::after{content:"";position:absolute;inset:-.6rem}
.icon-btn svg{display:block}
.icon-btn svg[hidden]{display:none}
.icon-btn:hover{color:var(--accent);border-color:var(--accent)}
@media (max-width:30rem){.topbar .home{font-size:.85rem}.topnav{gap:.7rem}.topnav a{font-size:.85rem}}

/* ---------- reading rail: a dab of each pigment ---------- */
.rail{display:none}
@media (min-width:88rem){
  .rail{display:flex;flex-direction:column;gap:.5rem;position:fixed;right:1.1rem;top:50%;transform:translateY(-50%);z-index:30}
  .rail a{display:flex;align-items:center;justify-content:flex-end;gap:.5rem;min-height:1.4rem;text-decoration:none;color:var(--ink-2);font-size:.78rem}
  .rail a span{opacity:0;transition:opacity .2s;background:var(--paper);padding:.1rem .35rem;border-radius:4px;white-space:nowrap}
  .rail a:hover span,.rail a:focus-visible span{opacity:1}
  .rail a i{display:block;width:9px;height:6px;border-radius:3px 5px 4px 6px;background:var(--pg,var(--rule-strong));box-shadow:0 0 0 1px var(--rule);transition:transform .2s}
  .rail a[aria-current="true"] i{transform:scale(1.7)}
  .rail a[aria-current="true"] span{opacity:1}
}
@media print{.rail,.topbar{display:none}}

main{margin:0 auto}
section,.hero,#culori{scroll-margin-top:calc(var(--bar) + 1rem)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(1rem,3vw,2rem)}

/* ---------- the opening ---------- */
.hero{position:relative;min-height:calc(100svh - var(--bar));display:flex;flex-direction:column;overflow:hidden}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;pointer-events:none}
.hero-inner{position:relative;z-index:1;max-width:var(--maxw);width:100%;margin:0 auto;padding:clamp(1.6rem,5vw,4.5rem) clamp(1rem,3vw,2rem) 0}
.hero-text{max-width:34rem}
@media (min-width:62rem){.hero-text{max-width:30rem}}
.kicker{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-weight:700;margin:0 0 .9rem}
h1{font-family:"Fraunces",Georgia,serif;font-weight:640;line-height:1.02;
  font-size:clamp(2.35rem,1.4rem + 4.2vw,4.6rem);margin:0 0 1.1rem;letter-spacing:-.025em;text-wrap:balance}
.deck{font-size:clamp(1.06rem,1rem + .4vw,1.26rem);color:var(--ink-2);margin:0 0 1.3rem;max-width:32rem}
.chips{display:flex;flex-wrap:wrap;gap:.35rem .5rem;margin:0 0 1rem;padding:0;list-style:none}
.chips a{display:inline-flex;align-items:center;gap:.4rem;min-height:2.75rem;padding:0 .7rem 0 .45rem;border-radius:999px;
  border:1px solid var(--rule);background:color-mix(in srgb,var(--paper) 86%,transparent);color:var(--ink);text-decoration:none;font-size:.86rem}
.chips a:hover{border-color:var(--accent)}
.chips i,.swatch-dot{display:inline-block;width:1.05rem;height:.72rem;border-radius:40% 55% 45% 60%/60% 45% 55% 40%;background:var(--pg);box-shadow:inset 0 0 0 1px rgba(0,0,0,.18)}
.cta{display:inline-flex;align-items:center;gap:.5rem;min-height:2.75rem;font-weight:700;color:var(--accent);text-decoration:none;border-bottom:2px solid currentColor}
.hero-space{flex:1 1 auto;min-height:min(14rem,32svh)}
@media (min-width:62rem){.hero-space{min-height:4rem}}

/* ---------- a pigment ---------- */
.pigment{padding:0 0 clamp(2rem,5vw,3.5rem)}
.band{display:block;width:100%;height:clamp(5.5rem,9vw,9rem);margin:clamp(1rem,3vw,2rem) 0 0}
.pg-head{display:flex;align-items:baseline;gap:.9rem;flex-wrap:wrap;margin:-.2rem 0 .4rem}
.pg-num{font-family:"Fraunces",Georgia,serif;font-size:.95rem;color:var(--ink-3);font-variant-numeric:tabular-nums}
.stamp{font-size:.76rem;letter-spacing:.09em;text-transform:uppercase;color:var(--accent);margin:0;font-weight:700}
.pigment h2,.block h2{font-family:"Fraunces",Georgia,serif;font-weight:620;line-height:1.1;
  font-size:clamp(1.6rem,1.15rem + 1.9vw,2.6rem);margin:.2rem 0 1rem;letter-spacing:-.018em;text-wrap:balance;max-width:44rem}
h3{font-family:"Fraunces",Georgia,serif;font-weight:600;font-size:1.18rem;margin:0 0 .4rem;line-height:1.25}
.anchor{color:inherit;text-decoration:none;position:relative;display:inline}
.anchor:hover{color:var(--accent)}
.pg-grid{display:grid;gap:clamp(1.2rem,3vw,3rem)}
@media (min-width:62rem){.pg-grid{grid-template-columns:minmax(0,var(--measure)) minmax(0,1fr);align-items:start}
  .pg-grid.flip .pg-side{order:-1}}
.pg-text p{margin:0 0 1rem;max-width:var(--measure)}
.facts{display:grid;grid-template-columns:auto 1fr;gap:.35rem 1rem;margin:1.2rem 0 0;padding:.9rem 1rem;border-left:3px solid var(--pg);background:color-mix(in srgb,var(--surface) 80%,transparent);border-radius:0 var(--r) var(--r) 0;font-size:.92rem}
.facts dt{color:var(--ink-3);font-weight:700}
.facts dd{margin:0;color:var(--ink)}
.pg-side{display:grid;gap:1rem}
@media (min-width:62rem){.pg-side{position:sticky;top:calc(var(--bar) + 1.2rem)}}
.fig{margin:0}
.fig .frame{background:var(--photo-bg);border-radius:6px;overflow:hidden;box-shadow:var(--shadow)}
.fig.painting .frame{border:10px solid var(--frame);outline:1px solid var(--frame-hi);outline-offset:-4px;border-radius:2px}
figcaption{font-size:.84rem;color:var(--ink-3);line-height:1.45;margin-top:.55rem}
figcaption .cr{display:block;margin-top:.2rem}
blockquote{margin:1.2rem 0;padding:.2rem 0 .2rem 1rem;border-left:3px solid var(--pg,var(--accent));font-family:"Fraunces",Georgia,serif;font-size:1.1rem;color:var(--ink)}
blockquote p{margin:0 0 .3rem}
blockquote cite{display:block;font-family:"Atkinson",sans-serif;font-style:normal;font-size:.82rem;color:var(--ink-3)}
.note{font-size:.9rem;color:var(--ink-2);border-top:1px dashed var(--rule-strong);padding-top:.7rem;margin-top:1rem}

/* ---------- blocks ---------- */
.block{padding:clamp(2.2rem,6vw,4rem) 0;border-top:1px solid var(--rule)}
.lede{max-width:var(--measure);margin:0 0 1rem;color:var(--ink-2)}

/* ---------- the studio ---------- */
.studio{display:grid;gap:1rem;margin-top:1.4rem}
@media (min-width:62rem){.studio{grid-template-columns:minmax(0,1fr) 19rem;align-items:start}}
.easel{position:relative;padding:clamp(8px,1.4vw,16px);background:linear-gradient(145deg,var(--frame-hi),var(--frame) 40%);border-radius:4px;box-shadow:var(--shadow)}
#studio-canvas{display:block;width:100%;aspect-ratio:4/3;touch-action:none;cursor:crosshair;border-radius:1px;background:#eee6d6}
@media (max-width:40rem){#studio-canvas{aspect-ratio:1/1}}
.tools{display:grid;gap:1rem}
.tools h3{font-family:"Atkinson",sans-serif;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);margin:0 0 .45rem}
.palette{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.4rem}
.well{display:flex;flex-direction:column;align-items:flex-start;gap:.3rem;min-height:3.6rem;padding:.45rem .5rem;border:1px solid var(--rule);border-radius:8px;background:var(--paper);color:var(--ink);font:inherit;font-size:.78rem;line-height:1.2;text-align:left;cursor:pointer}
.well i{display:block;width:100%;height:1.2rem;border-radius:45% 60% 50% 55%/60% 45% 60% 40%;background:var(--pg);box-shadow:inset 0 -2px 0 rgba(0,0,0,.18),inset 0 2px 0 rgba(255,255,255,.18)}
.well[aria-pressed="true"]{border-color:var(--ink);box-shadow:0 0 0 2px var(--ink) inset}
.row{display:flex;flex-wrap:wrap;gap:.4rem}
.btn,.size{font:inherit;font-size:.9rem;min-height:2.75rem;padding:.4rem .85rem;border:1px solid var(--rule-strong);border-radius:8px;background:var(--paper);color:var(--ink);cursor:pointer}
.btn:hover,.size:hover{border-color:var(--accent);color:var(--accent)}
.size[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.age label{display:block;font-weight:700;margin-bottom:.2rem}
.age input[type="range"]{width:100%;min-height:2.75rem;accent-color:var(--accent)}
.age output{display:block;font-family:"Fraunces",Georgia,serif;font-size:1.05rem}
.age .hint{font-size:.82rem;color:var(--ink-3);margin:.2rem 0 0}
.used{margin:0;padding:0;list-style:none;font-size:.88rem}
.used li{display:grid;grid-template-columns:1.1rem 1fr;gap:.5rem;padding:.35rem 0;border-bottom:1px dotted var(--rule-strong)}
.used li .swatch-dot{margin-top:.3rem}
.used b{display:block}
.used .risk{color:var(--accent);font-weight:700}
.studio-status{font-size:.88rem;color:var(--ink-2);min-height:1.3em;margin:.4rem 0 0}
.atelier-static{margin:1rem 0 0;padding:0;list-style:none;display:grid;gap:.5rem;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr))}
.atelier-static li{display:grid;grid-template-columns:1.2rem 1fr;gap:.6rem;padding:.6rem .8rem;border:1px solid var(--rule);border-radius:8px;background:var(--surface);font-size:.9rem}

/* ---------- timeline ---------- */
.tl{position:relative;margin-top:1.4rem}
.tl canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:1}
.tl-axis{display:grid;grid-template-columns:minmax(7rem,11rem) 1fr;gap:.8rem;font-size:.78rem;color:var(--ink-3)}
.tl-axis .ticks{position:relative;height:1.4rem;border-bottom:1px solid var(--rule-strong)}
.tl-axis .ticks span{position:absolute;transform:translateX(-50%);bottom:.2rem;font-variant-numeric:tabular-nums}
.tl-row{display:grid;grid-template-columns:minmax(7rem,11rem) 1fr;gap:.8rem;align-items:center;min-height:3rem;border-bottom:1px dotted var(--rule)}
.tl-row .nm{font-size:.9rem;line-height:1.2}
.tl-row .nm small{display:block;color:var(--ink-3);font-size:.76rem}
.tl-track{position:relative;height:1.6rem}
.tl-bar{position:absolute;top:.3rem;height:1rem;border-radius:4px;background:var(--pg);opacity:.9}
.js .tl-bar.painted{opacity:0}
.tl-bar.open-left{border-top-left-radius:0;border-bottom-left-radius:0}
@media (max-width:40rem){.tl-axis,.tl-row{grid-template-columns:5.8rem 1fr;gap:.5rem}.tl-row .nm{font-size:.8rem}}

/* ---------- true or false ---------- */
.qs{list-style:none;margin:1.2rem 0 0;padding:0;display:grid;gap:1rem;max-width:46rem}
.q{padding:1rem 1.1rem;background:var(--surface);border:1px solid var(--rule);border-radius:var(--r)}
.q-s{margin:0 0 .6rem;font-family:"Fraunces",Georgia,serif;font-size:1.15rem;line-height:1.3}
.q-btns{display:flex;gap:.5rem;flex-wrap:wrap}
.opt{font:inherit;font-size:.95rem;min-height:2.75rem;padding:.45rem 1rem;border:1px solid var(--rule-strong);border-radius:8px;background:var(--paper);color:var(--ink);cursor:pointer}
.opt:hover{border-color:var(--accent);color:var(--accent)}
.opt[aria-pressed="true"]{font-weight:700}
.opt.is-right{border-color:var(--ink);box-shadow:inset 0 -3px 0 var(--ink)}
.opt.is-wrong{border-color:var(--accent);box-shadow:inset 0 -3px 0 var(--accent);text-decoration:line-through}
.q-why{margin-top:.8rem;padding-top:.7rem;border-top:1px dashed var(--rule-strong);color:var(--ink-2)}
.q-why p{margin:0 0 .5rem}
.q-src{font-size:.85rem}

/* ---------- sources ---------- */
.srcs{padding-left:1.1rem;font-size:.9rem;max-width:52rem}
.srcs li{margin:0 0 .45rem}
.srcs a{overflow-wrap:anywhere}
.foot{border-top:1px solid var(--rule);padding:1.6rem clamp(1rem,3vw,2rem) 2.4rem;font-size:.88rem;color:var(--ink-3);max-width:var(--maxw);margin:0 auto}
.foot p{margin:.2rem 0}
.nf main{max-width:36rem;margin:14vh auto;padding:0 1.2rem}
.fig.patent{max-width:22rem}

/* ---------- pigment colours (generated from content.py) ---------- */
.pg-alb-de-plumb{--pg:#f2eee3}
.pg-vermilion{--pg:#d8392b}
.pg-ultramarin{--pg:#2a4ba0}
.pg-azurit{--pg:#2e5c9a}
.pg-carmin{--pg:#a4102c}
.pg-albastru-de-prusia{--pg:#1b3f72}
.pg-verde-smarald{--pg:#1fa37a}
.pg-galben-indian{--pg:#e3a12f}
.pg-maro-de-mumie{--pg:#824b27}
.tk-1400{left:13.774%}
.tk-1500{left:27.548%}
.tk-1600{left:41.322%}
.tk-1700{left:55.096%}
.tk-1800{left:68.871%}
.tk-1900{left:82.645%}
.tk-2000{left:96.419%}
.tlb-alb-de-plumb{left:0.000%;width:100.000%}
.tlb-vermilion{left:0.000%;width:100.000%}
.tlb-ultramarin{left:0.000%;width:72.727%}
.tlb-azurit{left:0.000%;width:61.983%}
.tlb-carmin{left:30.992%;width:69.008%}
.tlb-albastru-de-prusia{left:55.923%;width:44.077%}
.tlb-verde-smarald{left:70.799%;width:18.733%}
.tlb-galben-indian{left:66.116%;width:19.421%}
.tlb-maro-de-mumie{left:34.435%;width:57.025%}