/* focile-de-sub-gheata: polar night by default (the scene is lit from within); paper and ink by day. */
:root{
  --bg:#e4dfd4; --bg2:#d9d3c6; --surface:#f2eee6; --ink:#12161d; --ink2:#232a35; --muted:#454d59; --line:#b9b6ad; --line-soft:#d3cfc6;
  --acc:#8a4a12; --acc-ink:#7a3f0c; --focus:#1f4fd1; --card:rgba(245,243,238,.95); --kick:#7a3f0c;
  --c0:#2b2f38; --c1:#7d88b8; --c2:#a7adb4; --c3:#a7adb4;
  --stage-top:#e9e4da; --stage-bottom:#d4cdbf;
  --ramp-t:linear-gradient(90deg,#1a388c,#146685,#338c8c,#d9661a,#b8240f);
  --ramp-s:linear-gradient(90deg,#1e3c8c,#1e7896,#6e9696,#c8781e,#aa3c14);
  --motif-ice:#7f8c9c; --motif-bg:#e9e6df; --motif-glow:#b8650f;
  --to-top-bg:#e9e6df; --to-top-fg:#12161d;
  --disp:"Fraunces",Georgia,serif; --serif:"Source Serif 4",Georgia,serif; --ui:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --vh:1vh; --stage-h:calc(var(--vh) * 100 - 44px);
  color-scheme:light;
}
html.dark{
  --bg:#05070d; --bg2:#0a0e17; --surface:#0d121c; --ink:#e9eef5; --ink2:#d3dbe6; --muted:#aab4c2; --line:#2a3342; --line-soft:#182030;
  --acc:#f2b866; --acc-ink:#f5c582; --focus:#9db8ff; --card:rgba(6,9,16,.86); --kick:#f2b866;
  --c0:#f1e6cc; --c1:#7f8cc4; --c2:#7d8794; --c3:#7d8794;
  --stage-top:#080c16; --stage-bottom:#05070d;
  --ramp-t:linear-gradient(90deg,#0f2ef2,#0d8ce6,#4db8c7,#ffa338,#ff4714);
  --ramp-s:linear-gradient(90deg,#1846be,#2896dc,#96cde1,#ffc45a,#ff7828);
  --motif-ice:#cfe3ff; --motif-bg:#05070d; --motif-glow:#ffad4d;
  --to-top-bg:#05070d; --to-top-fg:#e9eef5;
  color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
svg[hidden]{display:none}
html{-webkit-text-size-adjust:100%;scroll-padding-top:56px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.1rem/1.62 var(--serif);text-rendering:optimizeLegibility}
a{color:var(--acc-ink);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--bg);padding:.5rem 1rem;z-index:50}
.skip:focus{left:8px;top:8px}
h1,h2,h3{font-family:var(--disp);font-weight:500;letter-spacing:-.012em;line-height:1.12;margin:0 0 .55em}
h1,h2,h3{font-variation-settings:"WONK" 0}
h1{font-size:clamp(1.9rem,2.3vw + .9rem,2.8rem);font-variation-settings:"opsz" 130,"WONK" 0;font-weight:400;text-wrap:balance}
h2{font-size:clamp(1.35rem,1.1vw + 1rem,1.8rem);font-variation-settings:"opsz" 72,"WONK" 0;text-wrap:balance;position:relative}
h3{font-size:1.16rem;margin-top:1.5em}
p{margin:0 0 1em}
.nw{white-space:nowrap}
.anchor{position:absolute;left:-1.1em;opacity:0;text-decoration:none;color:var(--muted);font-weight:400}
h2:hover .anchor,.anchor:focus{opacity:1}
.kicker{font:600 .78rem/1.35 var(--ui);letter-spacing:.08em;text-transform:uppercase;color:var(--kick);margin:0 0 .9rem}
.note{font:400 .88rem/1.5 var(--ui);color:var(--muted)}
.wrap{max-width:42rem;margin:0 auto;padding:0 16px}

/* topbar: slim, in the night's colour */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:.9rem;height:44px;padding:0 max(16px,env(safe-area-inset-left));background:var(--bg);border-bottom:1px solid var(--line-soft);font:500 .88rem/1 var(--ui)}
.home{display:flex;align-items:center;gap:.45rem;color:var(--ink);text-decoration:none;white-space:nowrap}
.home .motif{width:22px;height:22px;color:var(--ink)}
.topnav{display:flex;gap:1rem;overflow:hidden;min-width:0}
.topnav a{color:var(--ink2);text-decoration:none;white-space:nowrap}
.topnav a:hover{color:var(--ink);text-decoration:underline}
.spacer{flex:1}
.chip{color:var(--ink);text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:.36rem .7rem;min-height:32px;display:inline-flex;align-items:center}
.icon-btn{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--ink);cursor:pointer}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px}
.progress i{display:block;height:100%;width:0;background:var(--acc)}
@media (max-width:980px){.topnav{display:none}}
@media (pointer:coarse){.icon-btn{width:44px;height:44px}.chip{min-height:44px}}
.rail{display:none}

/* the story: the ocean pinned on the right, text passing on the left (phone: ocean on top) */
.story{position:relative;display:grid;grid-template-columns:minmax(0,27rem) minmax(0,1fr);grid-template-areas:"steps stage";min-width:0}
.stage{grid-area:stage;position:sticky;top:44px;height:var(--stage-h);margin:0;overflow:hidden;background:var(--stage-bottom)}
.stage canvas{position:absolute;inset:0;display:block;width:100%;height:100%;opacity:0;transition:opacity 1.2s ease;touch-action:pan-y;cursor:crosshair}
.stage.ready canvas{opacity:1}
.legend{position:absolute;left:16px;bottom:16px;display:grid;grid-template-columns:auto;gap:.3rem;padding:.5rem .7rem .45rem;border-radius:8px;background:var(--card);border:1px solid var(--line-soft);font:500 .74rem/1 var(--ui);color:var(--ink2);pointer-events:none;transition:opacity .4s;min-width:170px}
.legend .ramp{display:block;height:6px;border-radius:3px;background:var(--ramp-t)}
.legend .ramp[data-k=S]{background:var(--ramp-s)}
.legend .ends{display:flex;justify-content:space-between;color:var(--muted);font-weight:400}
.stage[data-scene=lid] .legend,.stage[data-scene=years] .legend,.stage[data-scene=seal] .legend{opacity:0}
.stage:not([data-scene=explore]) .orbit{display:none}
.scale{position:absolute;left:18px;bottom:68px;margin:0;font:400 .72rem/1.3 var(--ui);color:var(--muted);pointer-events:none;max-width:46%}
.tag{position:absolute;left:16px;top:12px;margin:0;font:500 1.6rem/1 var(--disp);color:var(--ink);pointer-events:none;text-shadow:0 0 18px var(--bg)}
.stage[data-scene=shelf] .tag,.stage[data-scene=seal] .tag,.stage[data-scene=ships] .tag,.stage[data-scene=floats] .tag,.stage[data-scene=seals] .tag{font:600 .82rem/1 var(--ui);letter-spacing:.04em;color:var(--acc)}
.orbit{position:absolute;right:70px;bottom:14px;display:grid;grid-template-columns:repeat(3,30px);grid-template-rows:repeat(3,30px);gap:2px;opacity:.55;transition:opacity .2s;z-index:3}
.orbit:hover,.orbit:focus-within{opacity:1}
.orbit button{display:grid;place-items:center;border:0;border-radius:50%;background:transparent;color:var(--ink);cursor:pointer;padding:0}
.orbit button:hover{background:var(--card)}
.orbit svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.orbit [data-o=home] svg{fill:currentColor;stroke:none}
.orbit [data-o=l]{grid-area:2/1}.orbit [data-o=r]{grid-area:2/3}.orbit [data-o=u]{grid-area:1/2}.orbit [data-o=d]{grid-area:3/2}.orbit [data-o=home]{grid-area:2/2}
.orbit [data-o=in]{grid-area:1/3}.orbit [data-o=out]{grid-area:3/3}
@media (pointer:coarse){.orbit{grid-template-columns:repeat(3,40px);grid-template-rows:repeat(3,40px)}}
.pop{position:absolute;z-index:6;width:280px;padding:.7rem .9rem .45rem;border-radius:10px;background:var(--card);border:1px solid var(--line);font:400 .86rem/1.4 var(--ui);color:var(--ink);box-shadow:0 12px 32px rgba(0,0,0,.35);max-height:calc(100% - 16px);overflow:auto}
.pop h3{margin:0 0 .25rem;font:600 .92rem/1.25 var(--ui);padding-right:1.7rem;display:flex;align-items:center;gap:.4rem}
.pop .dot{width:9px;height:9px;border-radius:50%;flex:none}
.dot.c0{background:var(--c0)}.dot.c1{background:var(--c1)}.dot.c2{background:var(--c2)}.dot.c3{background:var(--c3)}
.pop p{margin:.2rem 0}
.pop .big{font:500 1.3rem/1.15 var(--disp);margin:.3rem 0 .15rem}
.pop .note{font-size:.8rem}
.pop .x{position:absolute;right:4px;top:2px;border:0;background:transparent;color:var(--ink);font-size:1.35rem;width:36px;height:36px;cursor:pointer}
.nogl{position:absolute;left:16px;right:16px;top:12px;margin:0;font:500 .82rem/1.35 var(--ui);color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:8px;padding:.5rem .7rem;z-index:3}
.stage.nogl .legend,.stage.nogl .orbit,.stage.nogl .scale{display:none!important}

/* the seal's section and the place names */
.stage canvas.section{inset:auto;opacity:1;cursor:default;touch-action:auto;background:#0b111c!important;border-color:#1c2636!important}
.stage canvas.section{position:absolute;left:3%;right:3%;bottom:16px;height:56%;width:94%;z-index:2;border-radius:8px;background:var(--card);border:1px solid var(--line-soft)}
.stage[data-scene=seal] .legend{bottom:calc(min(38%,330px) + 28px)}
.places{position:absolute;inset:0;pointer-events:none;z-index:1}
.place{position:absolute;left:0;top:0;white-space:nowrap;font:500 .74rem/1 var(--ui);letter-spacing:.02em;color:var(--ink2);padding:.22rem .45rem;border-radius:999px;background:var(--card);border:1px solid var(--line-soft);translate:-50% -50%;opacity:.88}
.place.month{font-size:.66rem;padding:.12rem .32rem;opacity:.95;color:var(--acc-ink)}
.ytab{margin:.2rem 0 1rem;font:400 .85rem/1.35 var(--ui)}
.ytab summary{cursor:pointer;color:var(--ink2);min-height:32px;display:flex;align-items:center}
.ytab .tw{max-height:16rem;overflow:auto;margin-top:.4rem}
.ytab table{border-collapse:collapse;width:100%}
.ytab th,.ytab td{padding:.15rem .4rem;text-align:right;border-bottom:1px solid var(--line-soft)}
.ytab th:first-child{text-align:left}
#pick{margin-top:.2rem}

/* the year chart, along the bottom of the stage */
.stage[data-scene=years] .chart-stage{top:10%;bottom:12%;height:auto;left:5%;right:5%;background:transparent;border-color:transparent}
.stage[data-scene=years] canvas#canvas{opacity:0!important}
.chart-stage .key text{fill:var(--ink2)}
.chart-stage{position:absolute;left:3%;right:3%;bottom:56px;height:min(36%,320px);z-index:2;pointer-events:none;padding:10px 12px 4px;border-radius:8px;background:var(--card);border:1px solid var(--line-soft)}
.chart-stage svg{width:100%;height:100%;font-family:var(--ui);overflow:visible}
.chart-stage .ct{fill:var(--ink);font-size:17px;font-weight:600;paint-order:stroke;stroke:var(--bg);stroke-width:4px}
.chart-stage .gl{stroke:var(--line);stroke-width:1;opacity:.5}
.chart-stage .ax{fill:var(--ink2);font-size:13px;paint-order:stroke;stroke:var(--bg);stroke-width:3px}
.chart-stage .cur{fill:var(--ink);font-size:15px;font-weight:600;paint-order:stroke;stroke:var(--bg);stroke-width:4px}
.chart-stage .key text{font-size:14px}
.chart-stage .note{fill:var(--ink2);font-size:14px}
.stage[data-scene=years] .scale,.stage[data-scene=seal] .scale,.stage[data-scene=lid] .scale{opacity:0}
.chart-stage .b0{fill:var(--c0)}.chart-stage .b1{fill:var(--c1)}.chart-stage .b2{fill:var(--c2)}.chart-stage .b3{fill:var(--c3)}
.chart-stage .k0{fill:var(--c0);font-weight:600}.chart-stage .k1{fill:var(--c1);font-weight:600}.chart-stage .k2{fill:var(--c2);font-weight:600}
.chart-stage .dim{opacity:.38}

.steps{grid-area:steps;position:relative;z-index:2;padding:0 0 30vh;min-width:0}
.step{min-height:calc(var(--vh) * 94);display:flex;align-items:center;padding:2rem 1.2rem 22vh max(16px,2.4vw);scroll-margin-top:52px}
.step .card{background:var(--card);border:1px solid transparent;border-radius:4px;padding:1.35rem 1.45rem .7rem;max-width:28rem}
.step.intro{min-height:var(--stage-h)}
.step.intro .card{background:transparent;border:0;padding:1rem .2rem}
.deck{font-size:1.12rem;line-height:1.55;color:var(--ink2)}
.hint{font:500 .85rem/1.3 var(--ui);color:var(--muted);margin-top:1.4rem}
.step p{font-size:1.03rem}
.step.explore{min-height:calc(var(--vh) * 100);align-items:flex-start;padding-top:4rem}
.step.explore .card{max-width:30rem;width:100%}
.seal-out{font:400 .9rem/1.4 var(--ui);color:var(--ink2);min-height:1.4em;margin:.2rem 0 .5rem}
.seal-out b{font:500 1.15rem/1 var(--disp);color:var(--ink)}
.btn{min-height:38px;padding:.4rem .9rem;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--ink);font:500 .86rem/1 var(--ui);cursor:pointer;margin:0 0 .8rem}
.btn:hover{border-color:var(--acc);color:var(--acc-ink)}
.btn.play[data-on="1"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
@media (pointer:coarse){.btn{min-height:44px}}

.slab{display:block;font:600 .85rem/1.3 var(--ui);color:var(--ink2);margin:.9rem 0 .35rem}
.yrow{display:flex;gap:.6rem;align-items:center}
.yrow .btn{margin:0;white-space:nowrap}
input[type=range]{flex:1;width:100%;accent-color:var(--acc);min-height:40px}
.readout{font:400 .9rem/1.45 var(--ui);color:var(--ink2);margin:.3rem 0 .6rem;min-height:1.5em}
.readout b{font:500 1.25rem/1 var(--disp);color:var(--ink)}
.seg{display:flex;flex-wrap:wrap;gap:.35rem;margin:.3rem 0 .6rem}
.seg button{min-height:36px;padding:.35rem .75rem;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--ink);font:500 .84rem/1 var(--ui);cursor:pointer;display:inline-flex;align-items:center;gap:.4rem}
.seg button i{width:9px;height:9px;border-radius:50%;opacity:.35}
.seg button[aria-pressed=true]{border-color:var(--ink2)}
.seg button[aria-pressed=true] i{opacity:1}
.pill.c0 i{background:var(--c0)}.pill.c1 i{background:var(--c1)}.pill.c2 i{background:var(--c2)}.pill.c3 i{background:var(--c3)}
.seg button[aria-pressed=false]{color:var(--muted);text-decoration:line-through;text-decoration-thickness:1px}
@media (pointer:coarse){.seg button{min-height:44px}}

/* share row */
.share-row{display:flex;align-items:center;gap:.45rem;flex-wrap:wrap;margin-top:1rem}
.share-row .lbl{font:500 .85rem/1 var(--ui);color:var(--muted);margin-right:.2rem}
.sh{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--line-soft);background:transparent;color:var(--ink);cursor:pointer}
.sh svg{width:18px;height:18px}
.sh:hover,.sh:focus-visible{color:var(--acc);border-color:var(--acc)}
@media (pointer:coarse){.sh{width:44px;height:44px}}
.status{font:400 .85rem/1.3 var(--ui);color:var(--muted);min-height:1.2em;margin:.3rem 0 0}

/* after the story */
.block{padding:3rem 0;position:relative;z-index:3;background:var(--bg)}
.tinted{background:var(--bg2)}
.plain{list-style:none;padding:0}
.sources li{font:400 .9rem/1.45 var(--ui);margin:.35rem 0}
footer{display:flex;flex-wrap:wrap;gap:.5rem 1.4rem;justify-content:center;padding:2rem 16px 3rem;font:400 .85rem/1.4 var(--ui);color:var(--muted);background:var(--bg);position:relative;z-index:3}
footer a{color:var(--ink2)}
.to-top-x{left:auto!important;right:max(1rem,env(safe-area-inset-right))!important;bottom:76px!important}

/* phone: the ocean keeps the top 42% of the screen, the text passes below it */
@media (max-width:860px){
  .story{grid-template-columns:minmax(0,1fr);grid-template-areas:"main"}
  .stage{grid-area:main;align-self:start;height:calc(var(--vh) * 42);top:44px;z-index:4;box-shadow:0 1px 0 var(--line-soft),0 26px 0 0 var(--bg),0 48px 20px 6px var(--bg)}
  .steps{grid-area:main;padding-top:calc(var(--vh) * 42);padding-bottom:12vh}
  .step{min-height:calc(var(--vh) * 60);padding:1.4rem 12px 1rem;align-items:flex-start;scroll-margin-top:calc(var(--vh) * 42 + 50px)}
  .step .card{max-width:none;width:100%;padding:1.05rem 1rem .5rem}
  .step.intro{min-height:auto;padding-top:2.6rem}
  .step.intro .card{padding:.6rem .1rem}
  .hint{display:none}
  .legend{left:8px;bottom:8px;min-width:130px;padding:.35rem .5rem;font-size:.66rem}
  .scale{display:none}
  .tag{left:10px;top:8px;font-size:1.2rem}
  .orbit{right:4px;bottom:4px;transform:scale(.85);transform-origin:bottom right}
  .chart-stage{left:0;right:0;bottom:0;height:100%;border-radius:0;border:0;padding:8px 6px 2px}
  .chart-stage .key text{font-size:13px}
  .stage[data-scene=seal] .tag{display:none}
  .stage canvas.section{left:0;right:0;width:100%;bottom:0;height:64%;border-radius:0;border-width:1px 0 0}
  .place{font-size:.62rem;padding:.15rem .35rem}
  .stage:not([data-scene=explore]) .legend,.stage:not([data-scene=explore]) .orbit{display:none}
  .pop{position:fixed;left:8px!important;right:8px;top:auto!important;bottom:8px;width:auto;max-height:46vh;z-index:40;background:var(--surface)}
  .to-top-x{display:none!important}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.stage canvas{transition:none}}
@media print{.stage,.topbar{display:none}.story{display:block}}