@font-face{font-family:"Cormorant Garamond";font-style:normal;font-weight:400 700;font-display:swap;src:url("fonts/cormorant-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:"Cormorant Garamond";font-style:normal;font-weight:400 700;font-display:swap;src:url("fonts/cormorant-normal-latin-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+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:"Cormorant Garamond";font-style:italic;font-weight:400 700;font-display:swap;src:url("fonts/cormorant-italic-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:"Cormorant Garamond";font-style:italic;font-weight:400 700;font-display:swap;src:url("fonts/cormorant-italic-latin-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+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:"IBM Plex Sans";font-style:normal;font-weight:300 700;font-display:swap;src:url("fonts/IBMPlexSans-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+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:300 700;font-display:swap;src:url("fonts/IBMPlexSans-latin-ext.woff2") format("woff2");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}

/* Paper by day, a dusk meadow by night. The stage has its own palette (--sky-*, --open-*), read by meadow.js. */
:root{
  color-scheme:light;
  --bg:#f5f1e6;--surface:#fbf9f3;--surface-2:#ece6d6;
  --ink:#1b1c16;--ink-2:#36382e;--muted:#4b4d41;--line:#cdc6b2;--line-soft:#e2dccb;
  --accent:#5a4300;--accent-2:#e2b52c;--accent-ink:#fff;
  --serif:"Cormorant Garamond","Iowan Old Style",Georgia,serif;--sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --topbar:50px;
  /* the stage, morning meadow */
  --sky-0:#1f3d2c;--sky-1:#4f7a45;--sky-2:#b9c77e;--open-0:#86aec6;--open-1:#c9dcdf;--open-2:#f1dfb8;--ridge:#7f9c95;
  --far:#88a37e;--mid:#4e7350;--near:#23402b;--ground:#1d3424;--sun:#fff4cf;--seed:#ffffff;--beak:#f1e9d2;--stalk:#7c9a5c;
  --bokeh:#f6f9cf;--label:#ffffff;--thread:#ffffff;--lit:#ffd27a;--scene-dark:0;
  --glass:rgba(16,28,20,.62);--glass-ink:#f7f5ec;--glass-muted:#d6dccd;--glass-line:rgba(255,255,255,.28);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  color-scheme:dark;
  --bg:#10120e;--surface:#171a14;--surface-2:#20241c;
  --ink:#eeebdf;--ink-2:#d6d3c6;--muted:#aaa898;--line:#33382c;--line-soft:#242920;
  --accent:#f0cc5c;--accent-2:#f0cc5c;--accent-ink:#191407;
  --sky-0:#0a1026;--sky-1:#26244a;--sky-2:#a65b4c;--open-0:#0c1430;--open-1:#2d2b55;--open-2:#c56e4e;--ridge:#3a3458;
  --far:#2e2b4a;--mid:#22203d;--near:#14142a;--ground:#0e0f20;--sun:#ffc98f;--seed:#fff3e2;--beak:#e8d8bf;--stalk:#5b6a4e;
  --bokeh:#ffd9a8;--label:#fff3e2;--thread:#ffe7c2;--lit:#ffcf73;--scene-dark:1;
  --glass:rgba(10,12,26,.66);--glass-ink:#fbf3e6;--glass-muted:#d9d1c4;--glass-line:rgba(255,235,210,.26);
}}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#10120e;--surface:#171a14;--surface-2:#20241c;
  --ink:#eeebdf;--ink-2:#d6d3c6;--muted:#aaa898;--line:#33382c;--line-soft:#242920;
  --accent:#f0cc5c;--accent-2:#f0cc5c;--accent-ink:#191407;
  --sky-0:#0a1026;--sky-1:#26244a;--sky-2:#a65b4c;--open-0:#0c1430;--open-1:#2d2b55;--open-2:#c56e4e;--ridge:#3a3458;
  --far:#2e2b4a;--mid:#22203d;--near:#14142a;--ground:#0e0f20;--sun:#ffc98f;--seed:#fff3e2;--beak:#e8d8bf;--stalk:#5b6a4e;
  --bokeh:#ffd9a8;--label:#fff3e2;--thread:#ffe7c2;--lit:#ffcf73;--scene-dark:1;
  --glass:rgba(10,12,26,.66);--glass-ink:#fbf3e6;--glass-muted:#d9d1c4;--glass-line:rgba(255,235,210,.26);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
svg[hidden]{display:none}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--topbar) + 14px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:clip}
a{color:inherit;text-decoration-color:var(--accent);text-underline-offset:.18em;text-decoration-thickness:1.5px}
a:hover{color:var(--accent)}
:focus-visible{outline:2.5px solid var(--accent);outline-offset:3px;border-radius:4px}
.skip-link{position:absolute;left:12px;top:-60px;z-index:100;background:var(--ink);color:var(--bg);padding:10px 14px;border-radius:8px;font-weight:600}
.skip-link:focus{top:10px}
.num{font-variant-numeric:tabular-nums lining-nums;white-space:nowrap}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
h1,h2,h3{font-family:var(--serif);font-weight:600;text-wrap:balance;line-height:1.08;letter-spacing:.005em}
.anchor{opacity:0;margin-left:.3em;text-decoration:none;color:var(--muted);font-family:var(--sans);font-size:.5em;vertical-align:middle;display:inline-block;min-width:1.4em}
h2:hover .anchor,h3:hover .anchor,.anchor:focus-visible{opacity:1}
@media (pointer:coarse){.anchor{opacity:.55}}

/* ---------- top bar */
.topbar{position:fixed;inset:0 0 auto 0;height:var(--topbar);z-index:40;display:flex;align-items:center;gap:6px;padding:0 max(14px,env(safe-area-inset-right)) 0 max(14px,env(safe-area-inset-left));background:var(--bg);border-bottom:1px solid var(--line-soft);font-size:14px}
.brand{display:flex;align-items:center;gap:9px;font-weight:600;text-decoration:none;white-space:nowrap;min-width:0}
.brand span:last-child{overflow:hidden;text-overflow:ellipsis}
.brand-mark{width:22px;height:22px;flex:none;color:var(--ink)}
.topnav{display:none;gap:1px;margin-left:12px;overflow:hidden}
.topnav a{padding:6px 9px;border-radius:999px;text-decoration:none;color:var(--ink-2);white-space:nowrap}
.topnav a:hover,.topnav a[aria-current="true"]{color:var(--ink);background:var(--surface-2)}
@media (min-width:1180px){.topnav{display:flex}}
.spacer{flex:1}
.chip{padding:5px 10px;border-radius:999px;text-decoration:none;font-weight:600;font-size:13px;border:1px solid var(--line);color:var(--ink-2)}
.chip[aria-current="page"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.icon-btn{width:36px;height:36px;flex:none;display:grid;place-items:center;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.icon-btn:hover{background:var(--surface-2)}
.i-moon{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .i-sun{display:none}:root:not([data-theme="light"]) .i-moon{display:block}}
:root[data-theme="dark"] .i-sun{display:none}:root[data-theme="dark"] .i-moon{display:block}
/* progress: one seed drifting along the hairline */
.progress{position:fixed;left:0;right:0;top:var(--topbar);height:2px;z-index:41;pointer-events:none}
.progress i{position:absolute;inset:0;transform-origin:0 50%;transform:scaleX(0);background:linear-gradient(90deg,transparent,var(--accent-2))}
.progress b{position:absolute;top:-6px;left:0;width:14px;height:14px;transform:translateX(-7px);color:var(--accent-2)}

/* ---------- reading rail */
.rail{display:none}
@media (min-width:1280px){
.rail{display:flex;flex-direction:column;position:fixed;right:8px;top:50%;transform:translateY(-50%);z-index:30;padding:6px 3px;border-radius:14px;background:color-mix(in srgb,var(--bg) 88%,transparent)}
.rail-dot{position:relative;display:flex;align-items:center;justify-content:center;width:24px;height:22px;text-decoration:none}
.rail-dot .dot{width:7px;height:7px;border-radius:50%;background:var(--muted);transition:transform .2s,background .2s}
.rail-dot:hover .dot,.rail-dot:focus-visible .dot{background:var(--accent);transform:scale(1.3)}
.rail-dot[aria-current="true"] .dot{background:var(--accent);transform:scale(1.5);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 30%,transparent)}
.rail-label{position:absolute;right:calc(100% + 6px);top:50%;transform:translate(6px,-50%);padding:3px 10px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-size:13px;font-weight:600;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .15s,transform .15s}
.rail-dot:hover .rail-label,.rail-dot:focus-visible .rail-label{opacity:1;transform:translate(0,-50%)}
}

/* ---------- story: steps on the left, the meadow pinned on the right */
main{padding-top:var(--topbar)}
.story{display:grid;grid-template-columns:minmax(330px,34%) 1fr;gap:0 28px;padding:0 max(18px,env(safe-area-inset-left)) 0 max(18px,env(safe-area-inset-right))}
@media (min-width:1280px){.story{padding-right:48px}}
.stage{grid-column:2;grid-row:1;position:sticky;top:calc(var(--topbar) + 12px);height:calc(100svh - var(--topbar) - 24px);border-radius:20px;overflow:hidden;margin-top:12px;background:var(--sky-1);color:var(--glass-ink);isolation:isolate;touch-action:pan-y;user-select:none;-webkit-user-select:none}
.stage canvas,.stage .still{position:absolute;inset:0;width:100%;height:100%;display:block}
.stage .still{object-fit:cover}
.live .stage .still{display:none}
.steps{grid-column:1;grid-row:1;list-style:none;margin:0;padding:0}
/* stage overlays: solid tinted glass, never backdrop blur (the canvas animates underneath) */
.hud{position:absolute;z-index:2;left:14px;right:14px;top:14px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;pointer-events:none}
.hud>*{pointer-events:auto}
.windbar{display:flex;flex-wrap:wrap;gap:6px}
.wbtn{font:600 13.5px var(--sans);color:var(--glass-ink);background:var(--glass);border:1px solid var(--glass-line);border-radius:999px;padding:7px 12px;cursor:pointer;min-height:38px}
.wbtn[aria-pressed="true"]{background:var(--glass-ink);color:#16180f;border-color:var(--glass-ink)}
.wbtn small{font-weight:500;opacity:.85;margin-left:4px}
.wbtn[disabled]{opacity:.55;cursor:default}
.wnote{font-size:13px;color:var(--glass-ink);background:var(--glass);border-radius:10px;padding:5px 10px;margin:0}
.wnote button{font:inherit;color:inherit;background:none;border:0;text-decoration:underline;text-underline-offset:.15em;cursor:pointer;padding:0;margin-left:4px}
.speed{position:absolute;z-index:2;right:14px;top:64px;margin:0;font:600 13px var(--sans);color:var(--glass-ink);background:var(--glass);border-radius:999px;padding:4px 10px}
.blowbar{position:absolute;z-index:3;left:50%;bottom:18px;transform:translateX(-50%);display:flex;gap:8px;align-items:center}
.blow{font:600 16px var(--sans);color:#17190f;background:var(--glass-ink);border:0;border-radius:999px;padding:12px 22px;min-height:48px;cursor:pointer;box-shadow:0 8px 26px rgba(0,0,0,.28);display:flex;align-items:center;gap:9px;white-space:nowrap;touch-action:none}
.blow svg{flex:none}
.blow[data-on="1"]{transform:scale(.97);background:var(--accent-2)}
.mic{width:48px;height:48px;border-radius:50%;border:1px solid var(--glass-line);background:var(--glass);color:var(--glass-ink);display:grid;place-items:center;cursor:pointer}
.mic[data-on="1"]{background:var(--accent-2);color:#17190f;border-color:var(--accent-2)}
.result{position:absolute;z-index:3;left:14px;top:96px;max-width:min(420px,calc(100% - 28px));background:var(--glass);border:1px solid var(--glass-line);border-radius:14px;padding:12px 14px;margin:0;font-size:15px;line-height:1.45;color:var(--glass-ink)}
.result strong{font-size:1.15em}
.result p{margin:0}
.result .share-msg:empty{display:none}
.r-short{display:none}
.result .share{margin:6px 0 0}
.result .share-row{margin-top:0}
.result .ic{color:var(--glass-ink);border-color:var(--glass-line)}
.result .ic:hover,.result .ic:focus-visible{color:var(--accent-2);border-color:var(--accent-2)}
.result .share-label{color:var(--glass-muted)}
.result .share-msg{color:var(--glass-muted)}
/* without the script the picture is a still: hide the controls it would need */
html:not(.live) .blowbar,html:not(.live) .hud,html:not(.live) .toggle,html:not(.live) .live-line{display:none}
/* controls belong to the blow: other chapters show the picture alone (the distances chapter keeps the wind) */
.stage:not([data-scene="blow"]) .blowbar,.stage:not([data-scene="blow"]) .result,.stage:not([data-scene="blow"]) .speed{display:none}
.stage[data-scene="seed"] .hud,.stage[data-scene="rain"] .hud,.stage[data-scene="clones"] .hud{display:none}
.stage[data-scene="kernel"] .wnote{display:none}
.legendline{position:absolute;z-index:2;right:14px;bottom:24px;margin:0;font-size:12.5px;color:var(--glass-muted);max-width:40%;text-align:right}

.step{min-height:88vh;display:flex;align-items:center;padding:6vh 0}
.step:last-of-type{min-height:70vh}
.step-card{background:var(--surface);border:1px solid var(--line-soft);border-radius:16px;padding:22px 24px}
.step-card h2{font-size:34px;margin:2px 0 12px}
.step-card p{margin:0 0 12px}
.step-card p:last-child{margin-bottom:0}
.when{font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);margin:0 0 4px}
.hero{min-height:calc(100svh - var(--topbar));align-items:flex-start;padding-top:9vh}
.hero-card .kicker{font-size:13px;font-weight:600;letter-spacing:.07em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
.hero-card h1{font-size:clamp(40px,4.6vw,64px);margin:0 0 18px;font-weight:600}
.deck{font-size:19px;color:var(--ink-2);margin:0 0 20px}
.scroll-cue{font-size:14px;color:var(--muted);margin:0}
.scroll-cue::after{content:" ↓"}
.figs{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin:14px 0 4px}
.fig{border-top:1px solid var(--line);padding-top:8px}
.fig b{display:block;font-family:var(--serif);font-size:30px;line-height:1.05;font-weight:600}
.fig span{font-size:13.5px;color:var(--muted)}
.btn{font:600 15px var(--sans);border-radius:999px;padding:9px 16px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;min-height:44px}
.btn.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.toggle{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0 4px}
.toggle .btn[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.hero-card [data-incoming]{margin:0 0 16px}
.live-line{font-size:15px;color:var(--ink-2);border-left:3px solid var(--accent-2);padding-left:10px}

/* ---------- after the story */
.after{border-top:1px solid var(--line-soft);margin-top:6vh}
.prose{max-width:1060px;margin:0 auto;padding:30px max(18px,env(safe-area-inset-left)) 20px}
.block{max-width:720px;margin:0 auto 46px}
.block h2{font-size:36px;margin:0 0 14px}
.block h3{font-size:24px;margin:26px 0 8px}
.tablewrap{overflow-x:auto;margin:14px 0 18px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:14.5px}
caption{text-align:left;padding:12px 14px 4px;font-size:13.5px;color:var(--muted)}
th,td{padding:7px 12px;border-bottom:1px solid var(--line-soft);text-align:left;vertical-align:top}
thead th{font-size:13px;color:var(--muted);font-weight:600;white-space:nowrap}
td.num{text-align:right}
.sources{padding-left:20px;font-size:15px}
.sources li{margin-bottom:8px}
.related{font-size:15px;color:var(--ink-2)}
.share{max-width:720px;margin:14px auto}
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.share-label{font-size:14px;color:var(--muted);margin-right:4px}
.ic{width:40px;height:40px;display:inline-grid;place-items:center;border-radius:50%;border:1px solid var(--line-soft);background:transparent;color:var(--ink);cursor:pointer;padding:0}
.ic:hover,.ic:focus-visible{color:var(--accent);border-color:var(--accent)}
@media (pointer:coarse){.ic{width:44px;height:44px}}
.share-msg{font-size:13.5px;color:var(--muted);margin:6px 0 0;min-height:1.2em}
.site-footer{display:flex;flex-wrap:wrap;gap:8px 22px;justify-content:center;padding:26px 18px calc(34px + env(safe-area-inset-bottom));border-top:1px solid var(--line);font-size:14px;color:var(--muted)}
.back-top{position:fixed;right:max(16px,env(safe-area-inset-right));bottom:calc(16px + env(safe-area-inset-bottom));z-index:45;min-width:48px;height:48px;padding:0 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:600 14px var(--sans);display:flex;align-items:center;gap:6px;cursor:pointer;box-shadow:0 6px 18px rgba(0,0,0,.2)}
@media (min-width:1280px){.back-top{right:48px}}

/* ---------- phone and narrow tablet: the meadow on top (at most 40% of the screen), text below */
@media (max-width:899px){
  .story{display:block;padding:0}
  .stage{position:sticky;top:var(--topbar);height:min(40svh,380px);min-height:260px;border-radius:0;margin:0;z-index:5}
  .hud{left:10px;right:10px;top:8px;gap:5px}
  .windbar{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;max-width:100%}
  .wbtn{flex:none;font-size:12.5px;padding:5px 10px;min-height:34px}
  .wnote{font-size:12px;padding:3px 8px}
  .speed{top:auto;bottom:70px;right:10px;font-size:12px}
  .blowbar{bottom:10px}
  .blow{font-size:15px;padding:10px 18px;min-height:44px}
  .mic{width:44px;height:44px}
  .result{left:8px;right:8px;top:48px;max-width:none;font-size:13.5px;line-height:1.35;padding:6px 10px}
  .r-long{display:none}.r-short{display:block}
  .stage[data-has-result] .wnote{display:none}
  .result .share-row{margin-top:4px;gap:4px}
  .result .share-label{display:none}
  .result .ic{width:36px;height:36px}
  .legendline{display:none}
  .steps{padding:0 14px}
  .step{min-height:72svh;padding:4svh 0;align-items:flex-start}
  .hero{min-height:auto;padding-top:22px}
  .hero-card h1{font-size:38px}
  .deck{font-size:17px}
  .step-card{padding:18px}
  .step-card h2{font-size:29px}
  .back-top{min-width:44px;width:44px;height:44px;padding:0;justify-content:center;right:8px;bottom:calc(8px + env(safe-area-inset-bottom));opacity:.94}
  .back-top span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
}
@media (max-height:740px) and (min-width:900px){.step-card h2{font-size:30px}.hero-card h1{font-size:44px}.hero{padding-top:5vh}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
@media print{.topbar,.rail,.stage,.back-top,.progress{display:none}.story{display:block}.step{min-height:0;padding:8px 0}}