@font-face{font-family:Fraunces;src:url(fonts/fraunces-normal-latin.woff2) format('woff2');font-weight:300 900;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,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Fraunces;src:url(fonts/fraunces-normal-latin-ext.woff2) format('woff2');font-weight:300 900;font-display:swap;unicode-range:U+0100-02AF,U+0218-021B,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20CF,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:Plex;src:url(fonts/IBMPlexSans-latin.woff2) format('woff2');font-weight:100 700;font-display:swap;unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2190-2193,U+21BA,U+2212,U+2215}
@font-face{font-family:Plex;src:url(fonts/IBMPlexSans-latin-ext.woff2) format('woff2');font-weight:100 700;font-display:swap;unicode-range:U+0100-02AF,U+0218-021B,U+1E00-1EFF,U+20A0-20AB,U+20AD-20CF,U+2C60-2C7F,U+A720-A7FF}

:root{
  --bg:#f4efe4;--bg2:#ebe3d3;--surface:#fbf8f1;--ink:#1d2116;--ink2:#3c4133;--muted:#4a4f40;--line:#cfc5b0;
  --accent:#8a3d12;--accent-ink:#fff8ee;--green:#2f5a26;--field:#9a5a17;--hl:#d2410f;--pill:#fbf6ea;--pill-ink:#24291c;
  --stage:#e8d2b2;--focus:#0b5cad;--shadow:0 1px 2px rgba(40,30,10,.12),0 8px 28px rgba(40,30,10,.10);
  --serif:Fraunces,Georgia,'Times New Roman',serif;--sans:Plex,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --top:calc(52px + var(--browser-safe-top,env(safe-area-inset-top)));
  color-scheme:light;
}
:root[data-theme=dark]{
  --bg:#13170f;--bg2:#1b2016;--surface:#20261a;--ink:#f1ecdf;--ink2:#ddd6c4;--muted:#cdc6b2;--line:#3a4230;
  --accent:#f0a76b;--accent-ink:#1a1208;--green:#a9d18a;--field:#f1b36a;--hl:#ff8a4c;--pill:#20261a;--pill-ink:#f1ecdf;
  --stage:#2a2a20;--focus:#8cc4ff;--shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);color-scheme:dark}
[hidden]{display:none!important}svg[hidden]{display:none}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--top) + 8px)}
body{margin:0;background:var(--bg);color:var(--ink);font:400 18px/1.62 var(--sans);overflow-x:hidden}
a{color:var(--accent);text-underline-offset:2px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--surface);padding:8px 12px;z-index:50}.skip:focus{left:8px}
section,.scrolly{scroll-margin-top:calc(var(--top) + 8px)}

.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:14px;height:var(--top);padding:var(--browser-safe-top,env(safe-area-inset-top)) 16px 0;background:var(--bg);border-bottom:1px solid var(--line);font:500 14px/1 var(--sans)}
.topbar .home{color:var(--ink);text-decoration:none;font-weight:600;white-space:nowrap}
.topnav{display:flex;gap:16px;overflow-x:auto;scrollbar-width:none;white-space:nowrap;min-width:0}.topnav::-webkit-scrollbar{display:none}
.topnav a{color:var(--ink2);text-decoration:none;padding:6px 0}.topnav a:hover{color:var(--accent)}
.spacer{flex:1}
.chip{border:1px solid var(--line);border-radius:999px;padding:6px 10px;color:var(--ink);text-decoration:none}
.icon-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);display:grid;place-items:center;cursor:pointer;flex:none}

.hero{max-width:1400px;margin:0 auto;padding:44px 16px 18px;display:grid;gap:28px;align-items:center}
.hero-pic{margin:0;position:relative}.hero-pic img{width:100%;height:auto;display:block;border-radius:8px;box-shadow:var(--shadow)}
.hero-pic figcaption{position:absolute;top:10px;left:10px;right:10px;display:flex;justify-content:space-between;pointer-events:none}.hero-pic figcaption span{font:600 13px var(--sans);background:rgba(253,248,236,.94);color:#1f2418;border-radius:999px;padding:4px 10px}
.hero-pic figcaption span:last-child{margin-right:calc(50% - 10px - 4.6em)}
@media (min-width:1000px){.hero{grid-template-columns:minmax(380px,34fr) 66fr;padding:40px 20px 10px}}
.kicker,.eyebrow{font:600 13px/1.3 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
h1{font:600 clamp(36px,5.6vw,68px)/1.02 var(--serif);letter-spacing:-.015em;margin:0 0 18px;max-width:18ch}
h1 span{display:block;font:400 clamp(20px,2.4vw,30px)/1.25 var(--serif);font-style:normal;color:var(--ink2);margin-top:14px;letter-spacing:0;max-width:34ch}
.deck{font-size:clamp(18px,1.6vw,21px);max-width:62ch;color:var(--ink2);margin:0}
.shared-note{font:600 18px/1.45 var(--sans);background:var(--surface);border-left:4px solid var(--hl);padding:10px 14px;max-width:60ch;margin:0 0 16px}
h2{font:600 clamp(28px,3.4vw,42px)/1.1 var(--serif);margin:0 0 18px;max-width:22ch}
h3{font:600 24px/1.2 var(--serif);margin:0 0 10px}

/* scrolly */
.scrolly{display:grid;grid-template-columns:minmax(0,1fr);max-width:1400px;margin:0 auto;position:relative}
.stage{position:sticky;top:var(--top);z-index:5;margin:0;background:var(--bg);padding:6px 0 0}
.frame{position:relative;width:100%;max-height:40svh;margin:0 auto;overflow:hidden;background:var(--stage);border-radius:0;touch-action:manipulation;cursor:crosshair}
.box{position:relative;width:100%}
.box img,.box canvas,.box svg{position:absolute;inset:0;width:100%;height:100%;display:block}
.box img{object-fit:cover;transition:opacity .55s ease}
#fb{opacity:0}
#ov{pointer-events:none}
#outline{fill:rgba(255,243,196,.10);stroke:#fff3c4;stroke-width:4.5;stroke-linejoin:round;stroke-dasharray:9 6;opacity:0;transition:opacity .5s;filter:drop-shadow(0 0 3px rgba(0,0,0,.55))}
.show-outline #outline{opacity:1}
#hl{pointer-events:none}
.labels{position:absolute;inset:0;pointer-events:none}
.lb{position:absolute;transform:translate(-50%,-50%) scale(calc(1 / var(--z,1)));font:600 11.5px/1.15 var(--sans);letter-spacing:.07em;text-transform:uppercase;color:#2b2a1c;white-space:nowrap;transition:opacity .4s;text-shadow:0 0 3px #fbf1dc,0 0 6px #fbf1dc,0 0 10px rgba(251,241,220,.8)}
.lb.main{font:600 14px/1.15 var(--serif);letter-spacing:0;text-transform:none;background:rgba(253,248,236,.95);border-radius:999px;padding:5px 11px;box-shadow:0 1px 4px rgba(0,0,0,.28);text-shadow:none;color:#1f2418}
.lb.k{background:#24331c;color:#fdf5e4}
.lb.dim,.lb.out{opacity:0}
.pin{position:absolute;z-index:3;transform:translate(-50%,calc(-100% - 12px)) scale(calc(1 / var(--z,1)));transform-origin:50% 100%;max-width:240px;background:rgba(253,248,236,.97);color:#1f2418;font:500 13px/1.35 var(--sans);padding:8px 10px;border-radius:8px;box-shadow:0 4px 14px rgba(0,0,0,.3);pointer-events:none}
.pin b{display:block;font-weight:700;margin-bottom:2px}
.pin a{pointer-events:auto;color:#8a3d12;font-weight:600}
.controls{display:flex;align-items:center;gap:12px;padding:8px 16px 10px;font:500 15px/1 var(--sans);color:var(--ink2);flex-wrap:wrap}
.play{width:42px;height:42px;border-radius:50%;border:none;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;cursor:pointer;flex:none}
.i-play{width:0;height:0;border-left:13px solid currentColor;border-top:8px solid transparent;border-bottom:8px solid transparent;margin-left:4px}
.playing .i-play{width:12px;height:15px;border:none;border-left:4px solid currentColor;border-right:4px solid currentColor;margin:0}
.ylabel output{font:600 26px/1 var(--serif);color:var(--ink);font-variant-numeric:tabular-nums}
#yr{flex:1;min-width:140px;accent-color:var(--accent);height:28px}
.ynote{flex-basis:100%;font-size:13.5px;color:var(--muted);min-height:1.3em;line-height:1.3}

.steps{padding:0 16px 40px}
.step{max-width:560px;margin:0 auto;padding:22px 0 34vh}
.step-y small{font-weight:500;color:var(--muted);letter-spacing:0}
.step:first-child{padding-top:30px}
.step-y{font:600 15px/1 var(--sans);color:var(--hl);margin:0 0 8px;letter-spacing:.06em}
.step p{margin:0 0 14px}
.chart{margin:18px 0 0}.chart svg{width:100%;height:auto;display:block}
.chart .g{stroke:var(--line);stroke-width:1}.chart .ax{fill:var(--muted);font:500 13px var(--sans)}
.chart .m{stroke:var(--hl);stroke-width:1.5;stroke-dasharray:3 3}
.chart path{fill:none;stroke-width:2.6;stroke-linejoin:round}.chart .bank{stroke:var(--green)}.chart .field{stroke:var(--field)}
.chart .lb{position:static;transform:none;background:none;box-shadow:none;padding:0;font:600 14px var(--sans)}.chart .bank-t{fill:var(--green)}.chart .field-t{fill:var(--field)}
.chart figcaption{font-size:13.5px;color:var(--muted);margin-top:6px;line-height:1.4}

.square{max-width:560px;margin:0 auto;padding:30px 0 60px}
.chips{margin:18px 0}
.chips-h{font:600 14px/1.3 var(--sans);color:var(--muted);margin:0 0 6px}
.yc-row{display:flex;align-items:flex-end;gap:2px;height:84px;border-bottom:1px solid var(--line)}
.yc{flex:1;min-width:0;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:3px;background:none;border:0;padding:0;cursor:pointer;color:var(--muted)}
.yc[disabled]{cursor:default}.yc .bar{width:100%;height:calc(var(--h)*62px);background:var(--field);border-radius:2px 2px 0 0;opacity:.75}

.yc[aria-pressed=true] .bar{background:var(--hl);opacity:1}.yc[aria-pressed=true]{color:var(--ink)}
.yc:hover .bar{opacity:1}
.card{margin-top:14px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px;box-shadow:var(--shadow);min-height:84px}
.card-hint{color:var(--muted);margin:0}
.card .v{font:600 19px/1.4 var(--serif);margin:0 0 8px}
.card .where{font-size:13.5px;color:var(--muted);margin:0 0 10px}
.strip{display:flex;align-items:flex-end;gap:1px;height:56px;margin:4px 0 4px}
.strip i{flex:1;background:var(--green);border-radius:1px 1px 0 0;min-height:2px}
.strip i.lo{background:var(--field)}.strip i.na{background:var(--line)}.strip i.x{outline:2px solid var(--hl)}
.strip-ax{display:flex;justify-content:space-between;font:500 11px var(--sans);color:var(--muted)}
.strip-h{font:600 13px var(--sans);color:var(--muted);margin:10px 0 0}
.clear{margin-top:10px;background:none;border:1px solid var(--line);border-radius:999px;padding:7px 12px;color:var(--ink);font:500 14px var(--sans);cursor:pointer}
.share{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;align-items:center}
.sh{font:600 14px/1 var(--sans);padding:9px 12px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-decoration:none;cursor:pointer}
.sh[data-sh=native]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.sh-note{font-size:13px;color:var(--muted)}

.band{max-width:1180px;margin:0 auto;padding:56px 16px;border-top:1px solid var(--line)}
.col{max-width:640px}
.col p{margin:0 0 14px}
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;margin-top:22px}
.ph{margin:0}.ph.wide{grid-column:1/-1}
.ph img{width:100%;height:auto;display:block;border-radius:6px;background:var(--bg2)}
.ph figcaption{font-size:14px;line-height:1.45;color:var(--ink2);margin-top:6px}.ph .cr{color:var(--muted);white-space:nowrap}
@media (min-width:760px){.ph.wide{grid-column:span 2}}
.method p{font-size:16.5px}
.src{font-size:15px;padding-left:20px}.src li{margin:0 0 6px}
footer{display:flex;gap:18px;flex-wrap:wrap;justify-content:center;padding:28px 16px 40px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}
footer a{color:var(--ink2)}
.nf main{max-width:600px;margin:80px auto;padding:0 16px}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:10px 16px;border-radius:999px;text-decoration:none;font-weight:600}

@media (min-width:1000px){
  .scrolly{grid-template-columns:minmax(380px,34fr) 66fr;gap:0 28px;padding:0 20px}
  .stage{grid-column:2;grid-row:1;align-self:start;height:calc(100svh - var(--top));display:flex;flex-direction:column;justify-content:center;padding:10px 0}
  .frame{max-height:none;border-radius:8px;box-shadow:var(--shadow)}
  .steps{grid-column:1;grid-row:1;padding:0}
  .step{min-height:calc(100svh - var(--top));display:flex;flex-direction:column;justify-content:center;padding:6vh 0;margin:0}
  .step:first-child{padding-top:6vh}
  .square{margin:0;padding:10vh 0 30vh}
  .lb{font-size:13.5px}
}
@media (max-width:999px){
  .box{width:136%;margin-left:-15%}
  
  .lb{font-size:11px;padding:3px 7px}
  .lb.opt{display:none}
}
@media (prefers-reduced-motion:reduce){.frame img,#outline,.lb{transition:none}}

:root[data-theme=dark] .box img{filter:brightness(.84) saturate(.9) contrast(1.04)}
.strip-key{display:flex;gap:14px;font:500 12px var(--sans);color:var(--muted);margin-top:6px}.strip-key i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:5px;vertical-align:-1px}
@media (max-width:999px){.square{scroll-margin-top:calc(var(--top) + 46svh)}}

.chips .ax{position:relative;height:16px;font:500 11px var(--sans);color:var(--muted)}.chips .ax span{position:absolute;transform:translateX(-50%);top:3px}
.chips-note{font-size:13.5px;color:var(--muted);margin:4px 0 0;line-height:1.4}
.strip-ax{position:relative;height:14px;display:block}.strip-ax span{position:absolute;transform:translateX(-50%)}
.chart .lb{position:static;transform:none;text-shadow:none;letter-spacing:0;text-transform:none}
.ylabel{min-width:118px}
.box{transition:transform .9s cubic-bezier(.3,.6,.2,1);transform-origin:50% 50%}
@media (prefers-reduced-motion:reduce){.box{transition:none}}
.dusk{position:absolute;inset:0;pointer-events:none;display:none;mix-blend-mode:multiply;background:linear-gradient(to bottom,rgba(40,52,110,.85) 0,rgba(70,84,150,.45) 6%,rgba(92,108,170,.30) 45%,rgba(60,72,130,.42) 100%)}
:root[data-theme=dark] .dusk{display:block}:root[data-theme=dark] .box img{filter:brightness(.92) saturate(1.08) contrast(1.05)}