@font-face{font-family:"Fraunces";font-style:normal;font-weight:100 900;font-display:swap;src:url(fonts/fraunces-normal-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Fraunces";font-style:normal;font-weight:100 900;font-display:swap;src:url(fonts/fraunces-normal-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1D00-1DBF,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:"Source Serif 4";font-style:normal;font-weight:200 900;font-display:swap;src:url(fonts/source-serif-4-normal-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Source Serif 4";font-style:normal;font-weight:200 900;font-display:swap;src:url(fonts/source-serif-4-normal-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1D00-1DBF,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 Sans";font-style:normal;font-weight:100 700;font-display:swap;src:url(fonts/ibmplexsans-400-lat.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:"Plex Sans";font-style:normal;font-weight:100 700;font-display:swap;src:url(fonts/ibmplexsans-400-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1E00-1EFF,U+2020,U+20A0-20C0,U+2C60-2C7F,U+A720-A7FF}

:root{
  --bg:#f4efe4;--bg2:#ebe3d2;--card:#fbf8f1;--ink:#1d1710;--ink2:#382e22;--muted:#40372b;
  --line:#c3b597;--line-soft:#ddd3bd;--accent:#773003;--accent-ink:#fff;--cool:#1d4b8f;
  --glass:rgba(251,248,241,.9);--still:url(img/still-light.webp);
  --display:"Fraunces",Georgia,serif;--serif:"Source Serif 4",Georgia,"Times New Roman",serif;--sans:"Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bar:3rem;color-scheme:light
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#060a14;--bg2:#0b1222;--card:#0e1626;--ink:#efe9dc;--ink2:#d6cfc0;--muted:#c6bfb0;
  --line:#313b50;--line-soft:#1b2335;--accent:#f4b56a;--accent-ink:#1a0e00;--cool:#9cc3ff;
  --glass:rgba(10,15,28,.9);--still:url(img/still-dark.webp);color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#060a14;--bg2:#0b1222;--card:#0e1626;--ink:#efe9dc;--ink2:#d6cfc0;--muted:#c6bfb0;
  --line:#313b50;--line-soft:#1b2335;--accent:#f4b56a;--accent-ink:#1a0e00;--cool:#9cc3ff;
  --glass:rgba(10,15,28,.9);--still:url(img/still-dark.webp);color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
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 1.12rem/1.62 var(--serif);text-rendering:optimizeLegibility;overflow-x:hidden}
a{color:var(--accent);text-underline-offset:.16em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px;top:0;background:var(--card);color:var(--ink);padding:.6rem 1rem;z-index:80;font-family:var(--sans)}
.skip:focus{left:8px;top:8px}
section,h3[id]{scroll-margin-top:calc(var(--bar) + 12px)}
h1,h2,h3{line-height:1.08;margin:0;text-wrap:balance}
button,input{font:inherit}
.num{font-variant-numeric:tabular-nums lining-nums}

/* top bar */
.topbar{position:sticky;top:0;z-index:50;height:var(--bar);display:flex;align-items:center;gap:.7rem;padding:0 max(16px,env(safe-area-inset-left));
  background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line-soft);font:500 .86rem/1 var(--sans)}
.home{display:inline-flex;align-items:center;gap:.45rem;color:var(--ink);text-decoration:none;white-space:nowrap;font-weight:600;min-height:44px}
.home-ico{color:var(--accent)}
.topnav{display:flex;gap:1.1rem;overflow-x:auto;scrollbar-width:none;min-width:0;flex:0 1 auto;margin-left:.6rem}
.topnav::-webkit-scrollbar{display:none}
.topnav a{color:var(--ink2);text-decoration:none;white-space:nowrap;padding:.95rem .1rem}
.topnav a:hover{color:var(--accent)}
.spacer{flex:1}
.chip{display:inline-flex;align-items:center;min-height:34px;padding:0 .75rem;border:1px solid var(--line);border-radius:999px;color:var(--ink);text-decoration:none;font-weight:600}
.icon-btn{width:34px;height:34px;display:inline-grid;place-items:center;border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--ink);cursor:pointer}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.progress span{display:block;height:100%;width:100%;transform-origin:left;transform:scaleX(0);background:var(--accent)}
@media (max-width:860px){.topnav{display:none}}
@media (pointer:coarse){.chip,.icon-btn{min-height:44px;min-width:44px}.icon-btn{width:44px;height:44px}}

/* hero: the instrument */
.hero{position:relative;padding:clamp(1rem,3vh,2.4rem) max(16px,env(safe-area-inset-left)) 0;max-width:80rem;margin:0 auto}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr);grid-template-areas:"text" "inst" "stage" "more";gap:.6rem 3rem;align-items:start}
.hero-text{grid-area:text}
.stage-wrap{grid-area:stage;position:relative}
.instrument{grid-area:inst}
.more{grid-area:more}
.kicker{font:600 .8rem/1.35 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 .8rem}
h1{font-family:var(--display);font-weight:330;font-size:clamp(2.3rem,1.4rem + 4.4vw,5rem);letter-spacing:-.022em;line-height:1.0;max-width:14ch;font-variation-settings:"opsz" 144}
.deck{font-size:clamp(1.08rem,1rem + .5vw,1.32rem);line-height:1.5;max-width:36rem;margin:1rem 0 0;color:var(--ink2)}
.stage{position:relative;width:100%;aspect-ratio:1/1;max-height:min(78svh,44rem);margin:0 auto}
.stage canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.stage #front,.stage #back{pointer-events:none}
.stage.nogl{background:var(--still) center/contain no-repeat}
.stage.nogl canvas{display:none}
.clock{display:flex;flex-direction:column;align-items:center;text-align:center;gap:.2rem;margin:.2rem auto 0;min-height:4.4rem;max-width:30rem}
.day{font:600 1.05rem/1.2 var(--sans);font-variant-numeric:tabular-nums;color:var(--ink)}
.phase{font:400 .98rem/1.45 var(--serif);color:var(--ink2)}
.hold{display:flex;align-items:center;gap:1rem;width:100%;max-width:30rem;min-height:92px;padding:.7rem 1.4rem .7rem .7rem;border-radius:999px;border:1.5px solid var(--accent);
  background:color-mix(in srgb,var(--accent) 14%,var(--bg));color:var(--ink);cursor:pointer;text-align:left;
  touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;transition:background .2s,transform .12s}
.hold:hover{background:color-mix(in srgb,var(--accent) 22%,var(--bg))}
.hold[data-on="true"]{background:color-mix(in srgb,var(--accent) 20%,var(--bg));transform:scale(.985)}
.holdring{flex:0 0 auto;width:72px;height:72px}
.holdring .track{fill:var(--accent);stroke:color-mix(in srgb,var(--accent) 35%,transparent);stroke-width:5}
.holdring .arc{fill:none;stroke:var(--ink);stroke-width:5;stroke-linecap:round;stroke-dasharray:100;stroke-dashoffset:100;transform:rotate(-90deg);transform-origin:32px 32px}
.holdring .ic-play{fill:var(--accent-ink)}
.holdring .ic-wave{stroke:var(--accent-ink);stroke-width:3.2;stroke-linecap:round;display:none}
.hold[data-on="true"] .ic-play{display:none}.hold[data-on="true"] .ic-wave{display:inline}
.holdtxt{display:flex;flex-direction:column;gap:.25rem;min-width:0}
.holdlbl{font:600 1.12rem/1.2 var(--sans)}
.holdsub{font:400 .88rem/1.35 var(--sans);color:var(--muted)}
.stations{border:0;margin:1rem 0 0;padding:0;display:flex;flex-wrap:wrap;gap:.45rem;align-items:center;max-width:34rem}
.stations legend{font:500 .84rem/1.3 var(--sans);color:var(--muted);padding:0;margin-bottom:.45rem;width:100%}
.seg{position:relative;display:inline-flex}
.seg input{position:absolute;opacity:0;inset:0;width:100%;height:100%;margin:0;cursor:pointer}
.seg span{display:inline-flex;align-items:center;gap:.35rem;min-height:44px;padding:0 .9rem;border:1px solid var(--line);border-radius:999px;font:500 .9rem/1 var(--sans);color:var(--ink)}
.seg small{color:var(--muted);font-size:.8rem}
.seg input:checked+span{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent);font-weight:600}
.seg input:focus-visible+span{outline:3px solid var(--accent);outline-offset:2px}
.whathear{margin:.7rem 0 0;font:400 .9rem/1.45 var(--sans);color:var(--muted);max-width:30rem}
.status{min-height:1.4em;margin:.6rem 0 0;font:400 .9rem/1.4 var(--sans);color:var(--muted)}
.tones-row{margin:1.6rem 0 0;padding-top:1.2rem;border-top:1px solid var(--line-soft)}
.tones-h{font:600 .84rem/1.3 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 .7rem}
.tones{display:flex;flex-wrap:wrap;gap:.5rem}
.tone{display:inline-flex;flex-direction:column;align-items:flex-start;justify-content:center;min-height:52px;padding:.35rem .95rem;border:1px solid var(--line);border-radius:14px;background:transparent;color:var(--ink);cursor:pointer;text-align:left}
.tone b{font:600 .98rem/1.15 var(--sans);font-variant-numeric:tabular-nums}
.tone span{font:400 .82rem/1.2 var(--sans);color:var(--muted)}
.tone:hover{border-color:var(--accent)}
.tone[data-on="true"]{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,transparent)}
@media (min-width:980px){
  .hero{padding-top:2.6rem}
  .hero-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);grid-template-areas:"text stage" "inst stage" "more stage";grid-template-rows:auto auto 1fr;min-height:calc(100svh - var(--bar) - 9rem)}
  .stage-wrap{align-self:center}
  .instrument{padding-top:.8rem}
}
@media (max-width:979px){
  .stage{width:min(100%,40svh)}
  .hero-text{text-align:left}
  .hold{margin:.4rem auto 0}
  .clock{min-height:3.6rem}
  .stations{justify-content:center;margin-left:auto;margin-right:auto}
  .stations legend{text-align:center}
  .status,.whathear{text-align:center;margin-left:auto;margin-right:auto}
}
@media (max-width:560px){
  .holdring{width:60px;height:60px}.hold{min-height:80px;gap:.8rem}
  .holdlbl{font-size:1.02rem}
  .seg span{padding:0 .7rem;font-size:.86rem}
}

/* share */
.share-row{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;margin:1.6rem 0 0}
.share-label{font:500 .82rem/1 var(--sans);color:var(--muted);margin-right:.3rem}
.sh{width:40px;height:40px;display:inline-grid;place-items:center;border:1px solid var(--line-soft);border-radius:50%;background:transparent;color:var(--ink);cursor:pointer;text-decoration:none}
.sh:hover,.sh:focus-visible{border-color:var(--accent);color:var(--accent)}
.copied{margin:0;font:400 .82rem/1.3 var(--sans);color:var(--muted);flex-basis:100%;min-height:1em;overflow-wrap:anywhere}
@media (pointer:coarse){.sh{width:44px;height:44px}}

/* text sections */
.s{max-width:44rem;margin:0 auto;padding:4.2rem 16px 0}
.s.wide{max-width:62rem}
.s.wide>p,.s.wide>h2{max-width:44rem}
.s h2{font-family:var(--display);font-size:clamp(1.7rem,1.3rem + 2vw,2.6rem);font-weight:380;letter-spacing:-.016em;margin-bottom:1.1rem;font-variation-settings:"opsz" 96}
.s h2 .anchor,.s h3 .anchor{color:inherit;text-decoration:none}
.s h2 .anchor:hover{color:var(--accent)}
.s h3{font:600 1.15rem/1.3 var(--sans);margin:2rem 0 .3rem}
.s p{margin:.9rem 0}
.s p.lead{font-size:1.24rem;line-height:1.5;color:var(--ink2)}
.s ul{padding-left:1.2rem}.s li{margin:.5rem 0}
.note{font:400 .9rem/1.5 var(--sans);color:var(--muted)}
.code{font:500 .86rem/1 var(--sans);color:var(--muted)}
sub{font-size:.72em;line-height:0}
.btnrow{display:flex;flex-wrap:wrap;gap:.6rem;margin:1.2rem 0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55rem;min-height:48px;padding:0 1.15rem;border-radius:999px;border:1.5px solid var(--accent);background:var(--accent);color:var(--accent-ink);font:600 .95rem/1.2 var(--sans);cursor:pointer;text-align:left}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn:hover{filter:brightness(1.07)}
.btn .ic-pause{display:none}.btn[data-on="true"] .ic-play{display:none}.btn[data-on="true"] .ic-pause{display:inline}
.btn.ghost[data-on="true"]{border-color:var(--accent)}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.4rem 0}
table.t{width:100%;border-collapse:collapse;font:400 .92rem/1.4 var(--sans)}
table.t caption{text-align:left;color:var(--muted);padding:.4rem 0 .6rem;font-weight:500}
table.t th,table.t td{padding:.55rem .6rem;border-bottom:1px solid var(--line-soft);text-align:left;vertical-align:top}
table.t th{font-weight:600;color:var(--ink2);border-bottom:1.5px solid var(--line);font-size:.84rem}
table.t td.n,table.t th.n{text-align:right;font-variant-numeric:tabular-nums}
table.t tr.ro td{background:color-mix(in srgb,var(--accent) 12%,transparent);font-weight:600}
.tones-t td:nth-child(2){min-width:16rem}
.src{padding-left:1.2rem}.src li{margin:.7rem 0;font-size:.95rem;line-height:1.5}
.src a{word-break:break-word}

/* fingerprint */
.specbox{position:relative;margin:1.4rem 0 .6rem;padding-left:4.6rem}
#spec{display:block;width:100%;height:clamp(220px,34vw,340px);border-radius:8px;border:1px solid var(--line-soft);background:var(--bg2)}
.spechead{position:absolute;top:0;bottom:0;width:2px;margin-left:-1px;background:var(--ink);opacity:0;pointer-events:none;transition:opacity .2s}
.specplot{position:relative}
.ylab{position:absolute;left:-4.6rem;width:4.3rem;text-align:right;transform:translateY(-50%);font:500 .78rem/1.1 var(--sans);color:var(--ink2);white-space:nowrap}
.ylab.br{color:var(--accent);font-weight:600}
.xlab{display:flex;justify-content:space-between;font:400 .78rem/1 var(--sans);color:var(--muted);margin-top:.45rem}
.specnote{font:400 .9rem/1.5 var(--sans);color:var(--muted)}
.fig{margin:1.8rem 0}
.fig svg{display:block;width:100%;height:auto}
.fig figcaption{font:400 .88rem/1.5 var(--sans);color:var(--muted);margin-top:.6rem}
.sv-axis{stroke:var(--line);stroke-width:1}
.sv-grid{stroke:var(--line-soft);stroke-width:1}
.sv-soft{fill:var(--muted);font:400 11px var(--sans)}
.sv-lab{fill:var(--accent);font:600 11.5px var(--sans)}
.sv-trace{fill:none;stroke:var(--ink2);stroke-width:1.4;stroke-linejoin:round}
.sv-mark{stroke:var(--accent);stroke-width:1;stroke-dasharray:2 3;opacity:.7}

.foot{max-width:44rem;margin:0 auto;padding:3.4rem 16px 4.5rem;font:400 .9rem/1.6 var(--sans);color:var(--muted)}
.foot a{color:var(--ink2)}
html:not(.js) .instrument,html:not(.js) .tones-row,html:not(.js) .btnrow,html:not(.js) .clock{display:none}
html:not(.js) .stage{background:var(--still) center/contain no-repeat}
html:not(.js) .stage canvas{display:none}
@media (prefers-reduced-motion:reduce){.hold,.spechead{transition:none}}