@font-face{font-family:"Newsreader";font-style:normal;font-weight:200 800;font-display:swap;src:url(fonts/newsreader-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Newsreader";font-style:normal;font-weight:200 800;font-display:swap;src:url(fonts/newsreader-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,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:"Newsreader";font-style:italic;font-weight:400;font-display:swap;src:url(fonts/newsreader-italic-400-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Newsreader";font-style:italic;font-weight:400;font-display:swap;src:url(fonts/newsreader-italic-400-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,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 Mono";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/IBMPlexMono-Regular.woff2) format("woff2")}

/* Milk light: the page is pale and soft, the one strong colour is the red a newborn sees first. */
:root{
  --bg:#f3eee7;--bg-2:#e9e2d8;--ink:#27211e;--ink-2:#5b514b;--rule:#d6ccc0;--rule-2:#8d8177;
  --accent:#b3262f;--link:#9b1f27;--bar-bg:rgba(243,238,231,.86);
  --glass:rgba(248,244,238,.84);--glass-ink:#241e1b;--glass-ink-2:#5b514b;--glass-rule:rgba(60,40,30,.12);
  --stage:#d9d3cb;color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#101319;--bg-2:#161a22;--ink:#ece6df;--ink-2:#bdb4ab;--rule:#2a2f39;--rule-2:#7d766f;
  --accent:#f0646c;--link:#ff9a9f;--bar-bg:rgba(16,19,25,.86);
  --glass:rgba(16,19,25,.78);--glass-ink:#efe9e2;--glass-ink-2:#c4bbb2;--glass-rule:rgba(255,240,230,.12);
  --stage:#1b1e24;color-scheme:dark;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#101319;--bg-2:#161a22;--ink:#ece6df;--ink-2:#bdb4ab;--rule:#2a2f39;--rule-2:#7d766f;
    --accent:#f0646c;--link:#ff9a9f;--bar-bg:rgba(16,19,25,.86);
    --glass:rgba(16,19,25,.78);--glass-ink:#efe9e2;--glass-ink-2:#c4bbb2;--glass-rule:rgba(255,240,230,.12);
    --stage:#1b1e24;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 1.1875rem/1.62 "Newsreader",Georgia,serif;font-optical-sizing:auto}
a{color:var(--link);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px}
b,strong{font-weight:640}
.skip{position:absolute;left:-999px;top:0;background:var(--bg);color:var(--ink);padding:.5rem .8rem;z-index:99}
.skip:focus{left:.5rem;top:.5rem}
section[id],header[id]{scroll-margin-top:2.75rem}

/* ---- top bar ---- */
.topbar{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:.9rem;height:2.75rem;padding:0 1rem;background:var(--bar-bg);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--rule);font-size:.9rem}
.topbar a{color:var(--ink);text-decoration:none}
.topbar .home{font-weight:600;white-space:nowrap}
.topnav{display:flex;gap:1rem;overflow-x:auto;scrollbar-width:none;min-width:0;flex:0 1 auto}
.topnav::-webkit-scrollbar{display:none}
.topnav a{white-space:nowrap;color:var(--ink-2)}
.topnav a:hover,.topnav a[aria-current="true"]{color:var(--ink);text-decoration:underline}
.spacer{flex:1 1 0}
.chip{border:1px solid var(--rule-2);border-radius:99px;padding:.1rem .6rem;font-size:.82rem;white-space:nowrap}
.icon-btn{display:inline-grid;place-items:center;width:2.75rem;height:2.75rem;margin-right:-.6rem;background:none;border:0;color:var(--ink);cursor:pointer;border-radius:50%}
.icon-btn svg[hidden]{display:none}
@media (max-width:720px){.topnav{display:none}.topbar{gap:.6rem}}

/* ---- reading rail ---- */
.rail{position:fixed;right:.9rem;top:50%;transform:translateY(-50%);z-index:30;display:flex;flex-direction:column;gap:.55rem}
.rail a{display:flex;align-items:center;justify-content:flex-end;gap:.5rem;text-decoration:none;color:var(--ink-2);font-size:.8rem;min-height:24px}
.rail a span{opacity:0;transform:translateX(6px);transition:opacity .2s,transform .2s;background:var(--glass);color:var(--glass-ink);padding:.1rem .5rem;border-radius:4px;white-space:nowrap;backdrop-filter:blur(6px)}
.rail a:hover span,.rail a:focus-visible span{opacity:1;transform:none}
.rail i{width:8px;height:8px;border-radius:50%;border:1.5px solid var(--ink-2);background:var(--glass);flex:none;transition:background .2s,transform .2s}
.rail a[aria-current="true"] i{background:var(--accent);border-color:var(--accent);transform:scale(1.35)}
@media (max-width:900px){.rail{display:none}}

/* ---- the scene: the picture, filtered, behind everything ---- */
.stage{position:fixed;inset:0;z-index:0;background:var(--stage);overflow:hidden}
.stage canvas{display:block;width:100%;height:100%}
.stage video{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.stage .fallback{display:none;width:100%;height:100%;object-fit:cover;object-position:50% 38%}
.stage .fallback.grey{filter:grayscale(1)}
html.no-gl .stage canvas{display:none} html.no-gl .stage .fallback{display:block}
html:not(.js) .stage{display:none}
/* a veil on the reading side, so text stays legible over any picture */
.stage::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,var(--bg) 0%,transparent 55%);background:linear-gradient(90deg,var(--bg) 0%,color-mix(in srgb,var(--bg) 55%,transparent) 30%,transparent 55%);opacity:.75}
@media (max-width:720px){.stage::after{opacity:.92;background:linear-gradient(0deg,var(--bg) 0%,var(--bg) 30%,transparent 62%);background:linear-gradient(0deg,var(--bg) 0%,var(--bg) 30%,color-mix(in srgb,var(--bg) 60%,transparent) 48%,transparent 62%)}}
.guide{display:none;position:absolute;inset:0;pointer-events:none}
.guide i{position:absolute;left:27.5%;width:45%;top:45%;aspect-ratio:1/1.32;transform:translateY(-50%);border:2px dashed rgba(255,255,255,.8);border:2px dashed color-mix(in srgb,var(--bg) 85%,transparent);border-radius:50%;box-shadow:0 0 0 1px rgba(0,0,0,.25)}
.guide p{position:absolute;left:50%;top:calc(2.75rem + 12px);transform:translateX(-50%);margin:0;padding:.35rem .8rem;border-radius:99px;background:var(--glass);color:var(--glass-ink);font-size:.9rem;white-space:nowrap;max-width:calc(100% - 24px);overflow:hidden;text-overflow:ellipsis}
.guide .zoom{display:none;position:absolute;left:50%;top:calc(2.75rem + 52px);transform:translateX(-50%);align-items:center;gap:.6rem;padding:.2rem .9rem;border-radius:99px;background:var(--glass);color:var(--glass-ink);font:400 .78rem/1 "Plex Mono",ui-monospace,monospace;text-transform:uppercase;letter-spacing:.08em;pointer-events:auto}
.guide .zoom input{width:9rem;min-height:40px;accent-color:var(--accent)}
html.framing .guide{display:block} html.photo .guide .zoom{display:flex}
main,.foot{position:relative;z-index:1}
main{pointer-events:none}
main .card,main .hero>*,main .block,main .ch{pointer-events:auto}

/* ---- opening ---- */
.hero{min-height:calc(100svh - 2.75rem);display:flex;flex-direction:column;justify-content:center;padding:3rem max(16px,7vw) 4rem;max-width:44rem}
.kicker{font:400 .8rem/1.2 "Plex Mono",ui-monospace,monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 1.2rem}
.hero h1{font-weight:300;font-size:clamp(3.1rem,9vw,7rem);line-height:.96;letter-spacing:-.025em;margin:0 0 1.5rem;text-wrap:balance}
.deck{font-size:clamp(1.15rem,2.1vw,1.4rem);line-height:1.5;max-width:34rem;margin:0 0 2rem}
.go{display:flex;flex-wrap:wrap;gap:.8rem;align-items:center}
.btn{font:inherit;font-size:1rem;display:inline-flex;align-items:center;gap:.55rem;min-height:2.9rem;padding:.55rem 1.2rem;border-radius:99px;border:1px solid var(--rule-2);background:var(--glass);color:var(--glass-ink);cursor:pointer;transition:background .2s}
.btn:hover{background:var(--bg)}
.btn.primary{background:var(--ink);color:var(--bg);border-color:var(--ink);font-weight:560}
.btn.primary:hover{background:var(--accent);border-color:var(--accent)}
.btn input[type=file]{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden}
label.btn{position:relative}
label.btn:focus-within{outline:3px solid var(--accent);outline-offset:3px}
.fine{font-size:.92rem;color:var(--ink-2);max-width:32rem;margin:1rem 0 0}
.scroll-cue{margin:3rem 0 0;font-size:1.4rem;color:var(--ink-2);animation:cue 2.4s ease-in-out infinite}
@keyframes cue{50%{transform:translateY(6px);opacity:.5}}
@media (prefers-reduced-motion:reduce){.scroll-cue{animation:none}}
html:not(.js) .go,html:not(.js) .fine,html:not(.js) .scroll-cue,html:not(.js) .ctl{display:none}
html.no-cam #cam,html.no-gl #cam{display:none}

/* ---- the story ---- */
.chapter{padding:0 max(16px,7vw)}
.ch{font-weight:300;font-size:clamp(2rem,5vw,3.3rem);line-height:1.05;letter-spacing:-.01em;max-width:30rem;margin:34vh 0 4vh;padding:.5rem 1rem .6rem;text-wrap:balance;display:table;background:var(--glass);border-radius:12px;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.ch a,.block h2 a{color:inherit;text-decoration:none}
.ch a:hover::after,.block h2 a:hover::after{content:" #";color:var(--accent);font-size:.6em}
.step{min-height:82vh;display:flex;align-items:center;padding:6vh 0}
.card{max-width:30rem;background:var(--glass);color:var(--glass-ink);padding:1.4rem 1.6rem;border-radius:14px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-rule);opacity:.35;transform:translateY(10px);transition:opacity .6s,transform .6s}
.step.on .card,html:not(.js) .card{opacity:1;transform:none}
.card p{margin:0 0 .9rem}.card p:last-child{margin-bottom:0}
.card .wk{font:400 .78rem/1 "Plex Mono",ui-monospace,monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:1rem}
.card .last{font-size:1.45rem;line-height:1.4;font-weight:360}
.step.end{min-height:92vh}
@media (prefers-reduced-motion:reduce){.card{transition:none;transform:none}}
.still{display:none;margin:1rem 0 0}
.still img{display:block;width:100%;max-width:20rem;height:auto;border-radius:8px}
html:not(.js) .still{display:block}
.ctl{margin:.2rem 0 1rem}
.ctl label{display:flex;justify-content:space-between;font:400 .8rem/1.2 "Plex Mono",ui-monospace,monospace;letter-spacing:.08em;text-transform:uppercase;color:var(--glass-ink-2);margin-bottom:.4rem}
.ctl output{color:var(--accent)}
.ctl input{width:100%;accent-color:var(--accent);min-height:44px}
/* at the turn, the veil lifts a little: this is the face you were shown */
html.turn .stage::after{opacity:.55}

/* ---- age display and the compare button ---- */
.hud{position:fixed;right:max(12px,1.2vw);bottom:max(12px,1.2vw);z-index:35;display:flex;align-items:center;gap:.6rem;padding:.3rem .35rem .3rem .9rem;border-radius:99px;background:var(--glass);color:var(--glass-ink);border:1px solid var(--glass-rule);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);font:400 .78rem/1 "Plex Mono",ui-monospace,monospace;letter-spacing:.08em;text-transform:uppercase}
.hud .src{color:var(--glass-ink-2);text-transform:none;letter-spacing:0;font:italic 400 .85rem/1 "Newsreader",Georgia,serif}
.hold{white-space:nowrap;min-height:2.5rem;padding:0 .95rem;border-radius:99px;border:0;background:var(--ink);color:var(--bg);font:inherit;letter-spacing:.04em;cursor:pointer;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
.hold[aria-pressed="true"]{background:var(--accent)}
html:not(.js) .hud{display:none}
.hud{transition:opacity .4s}
/* hiding is instant (no fade over a card); only the return fades in */
html.ending .hud,html.hud-off .hud{opacity:0;visibility:hidden;pointer-events:none;transition:none}
/* without WebGL the page shows pre-rendered stills of the painting: no camera, no photo of your own */
html.no-gl #photo-l,html.no-gl #photo2-l,html.no-gl .guide{display:none}
#wk{white-space:nowrap}

/* ---- method, sources, footer ---- */
.block{position:relative;z-index:1;background:var(--bg);color:var(--ink);padding:4rem max(16px,7vw) 3rem;margin-top:10vh}
.block h2{font-weight:400;font-size:1.9rem;margin:0 0 1.2rem}
.method{max-width:44rem;color:var(--ink-2);font-size:1.02rem}
.srcs{padding-left:1.1rem;max-width:52rem;font-size:.95rem;color:var(--ink-2)}
.srcs li{margin:0 0 .45rem}
.srcs a{word-break:break-word}
.foot{background:var(--bg);color:var(--ink-2);padding:1.5rem max(16px,7vw) 3rem;border-top:1px solid var(--rule);font-size:.92rem}
.foot p{margin:.2rem 0}.foot a{color:var(--ink)}
#method+.block{margin-top:0;padding-top:1rem}

body.nf{background:var(--bg);min-height:100vh;display:grid;place-items:center;text-align:center}
body.nf h1{font-weight:300;font-size:2.4rem}

@media (max-width:720px){
  .hero{justify-content:flex-end;padding-top:2rem;padding-bottom:4.5rem}
  .scroll-cue{display:none}
  .kicker{display:none}
  .hero h1{font-size:clamp(2.9rem,14vw,4.2rem)}
  .deck{font-size:1.08rem;margin-bottom:1.3rem}
  .ch{margin-top:48vh;font-size:clamp(1.6rem,7vw,2.2rem)}
  .step{min-height:88vh;align-items:flex-end;padding:0 0 calc(var(--hud-h,3.2rem) + 10px + 2vh)}
  .card{padding:1.1rem 1.2rem;font-size:1.06rem}
  .hud{left:12px;right:12px;bottom:10px;justify-content:space-between}
  .hud .src{display:none}
}