@font-face{font-family:'Fraunces';font-style:normal;font-weight:300 900;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+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:'Fraunces';font-style:normal;font-weight:300 900;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:'Source Serif 4';font-style:normal;font-weight:300 700;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+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:'Source Serif 4';font-style:normal;font-weight:300 700;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:'IBM Plex Sans';font-style:normal;font-weight:400;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;}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;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:'IBM Plex Sans';font-style:normal;font-weight:600;font-display:swap;src:url('fonts/ibmplexsans-600-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;}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:600;font-display:swap;src:url('fonts/ibmplexsans-600-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;}

/* light: concrete paper, sodium-lamp accent. The map panel stays a night view in both themes. */
:root{color-scheme:light dark;
--paper:#f2f0eb;--ink:#1d2027;--soft:#575d6b;--wash:#e6e3db;--card:#faf9f6;--line:#cfcbc1;--line-soft:#dedad1;
--accent:#a8500e;--accent-ink:#ffffff;--link:#8f430c;
--c-b:#3f6a9e;--c-if:#c4561a;--s0:#4a6f9f;--s1:#a77908;--s2:#c9641a;--s3:#b8331c;--band:rgba(63,106,158,.08);
--serif:'Source Serif 4',Georgia,'Times New Roman',serif;--display:'Fraunces',Georgia,serif;--sans:'IBM Plex Sans',-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
--night:#0c0e14;--night-card:rgba(16,19,28,.86);--night-line:rgba(170,182,206,.28);--night-ink:#e9ecf3;--night-soft:#aab3c5;
--e0:rgb(150,178,214);--e1:rgb(246,214,128);--e2:rgb(255,160,64);--e3:rgb(255,86,58);}
@media (prefers-color-scheme:dark){:root:not([data-theme='light']){
--paper:#111318;--ink:#e8e6e1;--soft:#a9adb8;--wash:#1c1f27;--card:#171a21;--line:#353a46;--line-soft:#272b35;
--accent:#f2a24a;--accent-ink:#111318;--link:#f3b06a;
--c-b:#8fb3e0;--c-if:#ff9a55;--s0:#96b2d6;--s1:#f6d680;--s2:#ffa040;--s3:#ff6a4f;--band:rgba(143,179,224,.08);}}
:root[data-theme='dark']{
--paper:#111318;--ink:#e8e6e1;--soft:#a9adb8;--wash:#1c1f27;--card:#171a21;--line:#353a46;--line-soft:#272b35;
--accent:#f2a24a;--accent-ink:#111318;--link:#f3b06a;
--c-b:#8fb3e0;--c-if:#ff9a55;--s0:#96b2d6;--s1:#f6d680;--s2:#ffa040;--s3:#ff6a4f;--band:rgba(143,179,224,.08);}

*{box-sizing:border-box;}
html{scroll-padding-top:64px;}
body{overflow-anchor:none;margin:0;background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:18px;line-height:1.7;}
a{color:var(--link);}
img{max-width:100%;height:auto;display:block;}
button,input{font:inherit;color:inherit;}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--accent-ink);padding:.5rem 1rem;z-index:99;}
.skip:focus{left:0;}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;}

/* topbar */
.topbar{position:sticky;top:0;z-index:40;display:flex;gap:.6rem;align-items:center;padding:.55rem 20px;background:color-mix(in srgb,var(--paper) 90%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line-soft);font-family:var(--sans);}
.topbar .home{display:inline-flex;align-items:center;gap:.4rem;font-weight:600;color:var(--ink);text-decoration:none;white-space:nowrap;font-size:.92rem;}
.topbar .home svg{color:var(--accent);}
.topnav{display:flex;gap:.1rem;overflow-x:auto;scrollbar-width:none;min-width:0;}
.topnav::-webkit-scrollbar{display:none;}
.topnav a{white-space:nowrap;color:var(--soft);text-decoration:none;font-size:.84rem;padding:.3rem .55rem;border-radius:99px;}
.topnav a[aria-current]{color:var(--ink);background:var(--wash);}
.spacer{flex:1;}
.chip{border:1px solid var(--line);border-radius:99px;padding:.2rem .7rem;font-size:.82rem;color:var(--ink);text-decoration:none;background:var(--card);white-space:nowrap;}
.icon-btn{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:50%;width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;flex:none;}
@media (pointer:coarse){.icon-btn{width:44px;height:44px;}.chip{padding:.55rem .8rem;}}
@media (max-width:599px){.topbar .home span{display:none;}}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none;}
.progress #progress-bar{position:absolute;inset:0;background:var(--accent);transform-origin:0 50%;transform:scaleX(0);opacity:.55;}
.progress #progress-house{position:absolute;left:0;bottom:1px;width:18px;height:16px;color:var(--accent);opacity:0;}

/* map chrome (always a night view) */
.hero-stage,.story-stage{position:relative;overflow:hidden;background:var(--night);color:var(--night-ink);}
.hero-stage canvas,.story-stage canvas{display:block;touch-action:pan-y;}
.yearbig{position:absolute;z-index:2;right:clamp(12px,2vw,28px);top:clamp(10px,2vw,22px);margin:0;font-family:var(--display);font-weight:600;font-size:clamp(2.4rem,6vw,4.6rem);line-height:1;color:#fff;text-shadow:0 2px 18px rgba(0,0,0,.6);font-variant-numeric:tabular-nums;pointer-events:none;}
.counters{position:absolute;z-index:2;right:clamp(12px,2vw,28px);top:calc(clamp(10px,2vw,22px) + clamp(2.6rem,6.4vw,5rem));width:min(250px,48vw);font-family:var(--sans);font-size:.8rem;background:var(--night-card);border:1px solid var(--night-line);border-radius:12px;padding:.45rem .6rem .5rem;pointer-events:none;}
.counters .cu{margin:0 0 .25rem;color:var(--night-soft);font-size:.72rem;line-height:1.2;}
.cr{display:grid;grid-template-columns:4.6rem 1fr 2.6rem;gap:.4rem;align-items:center;line-height:1.5;}
.cr .cn{color:var(--night-soft);}
.cr b{text-align:right;font-variant-numeric:tabular-nums;}
.cb{height:7px;background:rgba(255,255,255,.08);border-radius:4px;overflow:hidden;}
.cb i{display:block;height:100%;transform-origin:0 50%;border-radius:4px;}
.cr[data-c=B] .cb i{background:var(--e0);}
.cr[data-c=IF] .cb i{background:var(--e2);}
.legend{position:absolute;z-index:2;left:clamp(10px,2vw,24px);bottom:clamp(10px,2vw,20px);font-family:var(--sans);font-size:.76rem;color:var(--night-soft);background:var(--night-card);border:1px solid var(--night-line);border-radius:10px;padding:.35rem .6rem;display:flex;gap:.25rem .8rem;flex-wrap:wrap;max-width:calc(100% - 90px);}
.legend[hidden]{display:none;}
.legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:.3rem;vertical-align:-1px;}
.legend .e0{background:var(--e0);} .legend .e1{background:var(--e1);} .legend .e2{background:var(--e2);} .legend .e3{background:var(--e3);}
.legend .h0{background:rgb(123,78,130);} .legend .h1{background:rgb(156,111,150);} .legend .h2{background:rgb(209,181,190);} .legend .h3{background:rgb(255,255,230);}
.legend .lh{width:100%;color:var(--night-ink);}
.legend .attr{width:100%;font-size:.68rem;}
.legend a{color:inherit;}
.zoom{position:absolute;z-index:2;right:clamp(10px,2vw,24px);bottom:132px;display:flex;flex-direction:column;gap:.35rem;}
.zoom .icon-btn{background:var(--night-card);color:var(--night-ink);border-color:var(--night-line);}
.zoom{align-items:flex-end;}
.city-btn{font:600 .78rem var(--sans);background:var(--night-card);color:var(--night-ink);border:1px solid var(--night-line);border-radius:999px;padding:.32rem .85rem;cursor:pointer;white-space:nowrap;}
.city-btn:hover,.city-btn:focus-visible{border-color:var(--night-ink);}
.city-btn[hidden]{display:none;}
@media (pointer:coarse){.city-btn{min-height:44px;}}
.tip{position:absolute;left:0;top:0;z-index:6;max-width:250px;background:#fff;color:#1d2027;border-radius:10px;padding:.4rem .6rem;font-family:var(--sans);font-size:.8rem;line-height:1.35;box-shadow:0 8px 24px rgba(0,0,0,.3);pointer-events:none;}
.tip b{display:block;}
.map-fallback{display:block;position:absolute;left:16px;right:16px;bottom:50%;z-index:3;margin:0;text-align:center;font-family:var(--sans);color:var(--night-ink);background:var(--night-card);padding:.6rem .8rem;border-radius:10px;}
.map-ready .map-fallback{display:none;}

/* hero */
.hero{position:relative;display:grid;grid-template-columns:minmax(0,1fr);}
.hero-stage{grid-area:1/1;height:calc(100svh - 50px - 64px);min-height:520px;}
.hero-text{grid-area:1/1;position:relative;z-index:3;align-self:start;margin:clamp(14px,3vw,36px) 0 0 clamp(14px,3vw,44px);max-width:min(500px,calc(100% - 28px));background:color-mix(in srgb,var(--paper) 94%,transparent);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border:1px solid var(--line-soft);border-radius:18px;padding:clamp(16px,2.2vw,26px);box-shadow:0 12px 40px rgba(0,0,0,.28);}
.kicker{font-family:var(--sans);text-transform:uppercase;letter-spacing:.12em;font-size:.72rem;color:var(--accent);margin:0 0 .4rem;font-weight:600;}
h1{font-family:var(--display);font-weight:600;font-size:clamp(1.85rem,3.9vw,2.8rem);line-height:1.07;margin:0 0 .7rem;letter-spacing:-.012em;text-wrap:balance;}
.deck{font-size:1.04rem;margin:0 0 .9rem;line-height:1.55;}
.deck b{font-family:var(--sans);font-weight:600;}
.clockbar{grid-area:2/1;display:flex;align-items:center;gap:.9rem;flex-wrap:wrap;padding:.55rem clamp(12px,2vw,28px);background:var(--night);color:var(--night-ink);font-family:var(--sans);border-top:1px solid var(--night-line);}
.btn{border:0;background:var(--accent);color:var(--accent-ink);border-radius:12px;padding:.6rem 1rem;font-family:var(--sans);font-weight:600;cursor:pointer;min-height:44px;}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line);}
.btn.play{display:inline-flex;gap:.45rem;align-items:center;background:#f2a24a;color:#111318;white-space:nowrap;}
.btn.play[aria-pressed=true] svg{opacity:.4;}
.range{position:relative;flex:1;min-width:200px;padding-bottom:1.1rem;}
.range input{width:100%;accent-color:#f2a24a;margin:0;height:28px;}
.ticks{position:relative;height:8px;margin:0 9px;}
.ticks i{position:absolute;top:0;width:7px;height:7px;margin-left:-3.5px;border-radius:50%;}
.ticks i.o{background:#f2a24a;}
.ticks i.e{border:1px solid rgba(233,236,243,.5);}
.tlab{position:absolute;left:9px;right:9px;bottom:0;display:flex;justify-content:space-between;font-size:.72rem;color:var(--night-soft);}
.tkey{margin:0;display:flex;gap:.8rem;font-size:.74rem;color:var(--night-soft);}
.tkey i{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:.3rem;}
.tkey i.o{background:#f2a24a;} .tkey i.e{border:1px solid rgba(233,236,243,.5);}

.find-form{position:relative;margin:.2rem 0 .3rem;}
.find-form label{display:block;font-family:var(--sans);font-weight:600;font-size:.86rem;margin-bottom:.3rem;}
.find-row{display:flex;gap:.4rem;}
.find-row input{flex:1;min-width:0;border:1.5px solid var(--line);background:var(--card);border-radius:12px;padding:.62rem .8rem;font-family:var(--sans);font-size:1rem;}
.find-row input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 25%,transparent);}
#find-list{position:absolute;left:0;right:0;top:100%;z-index:5;list-style:none;margin:.25rem 0 0;padding:.25rem;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 30px rgba(0,0,0,.18);font-family:var(--sans);font-size:.95rem;max-height:300px;overflow:auto;}
#find-list li{padding:.5rem .6rem;border-radius:8px;cursor:pointer;}
#find-list li[aria-selected=true]{background:var(--wash);}
.tries{font-family:var(--sans);font-size:.82rem;color:var(--soft);margin:.4rem 0 0;display:flex;flex-wrap:wrap;gap:.3rem;align-items:center;}
.tries button{border:1px solid var(--line);background:transparent;border-radius:99px;padding:.15rem .6rem;cursor:pointer;color:var(--ink);min-height:30px;}
@media (pointer:coarse){.tries button{min-height:44px;}}
#find-status{font-family:var(--sans);font-size:.88rem;color:var(--accent);min-height:1.1em;margin:.3rem 0 0;}
.answer{margin-top:.4rem;}
.answer[hidden]{display:none;}
.answer-sum{font-size:1.02rem;line-height:1.5;margin:.2rem 0 .4rem;font-weight:600;}
.answer-note{font-family:var(--sans);font-size:.84rem;color:var(--soft);margin:.3rem 0;line-height:1.45;}
.spark{margin:.2rem 0;}
.spark svg{width:100%;height:auto;display:block;}
.spark figcaption{font-family:var(--sans);font-size:.72rem;color:var(--soft);line-height:1.35;}
.spark .ar{fill:color-mix(in srgb,var(--c-if) 18%,transparent);}
.spark .ln{fill:none;stroke:var(--c-if);stroke-width:2.2;}
.spark circle{fill:var(--paper);stroke:var(--c-if);stroke-width:2;}
.spark text{font-family:var(--sans);font-size:10px;fill:var(--soft);text-anchor:middle;}
.spark text.v{font-size:12px;font-weight:600;fill:var(--ink);text-anchor:start;}
.spark text.v.e{text-anchor:end;}
.answer-actions{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:.5rem;align-items:center;}
.place-share{display:inline-flex;gap:.4rem;margin-left:auto;}
.place-share .icon-btn{width:40px;height:40px;background:transparent;border-color:var(--line-soft);color:var(--soft);}
.place-share .icon-btn:hover,.place-share .icon-btn:focus-visible{color:var(--accent);border-color:var(--accent);}
.place-share [hidden]{display:none;}
.place-link{width:100%;margin-top:.5rem;border:1px solid var(--line);background:var(--card);border-radius:10px;padding:.45rem .6rem;font-family:var(--sans);font-size:.82rem;color:var(--ink);}
.place-link[hidden]{display:none;}
@media (pointer:coarse){.place-share .icon-btn{width:44px;height:44px;}}
@media (min-width:900px){
  .hero-text{max-height:calc(100svh - 50px - 64px - 2*clamp(14px,3vw,36px));overflow:auto;overscroll-behavior:contain;}
  .has-answer .hero-text .deck,.has-answer .hero-text .tries{display:none;}
  .has-answer .hero-text h1{font-size:clamp(1.4rem,2.3vw,1.8rem);}
}
@media (max-width:899px){
  .hero{display:flex;flex-direction:column;}
  .hero-text{order:0;margin:12px 12px 0;max-width:none;box-shadow:none;background:var(--paper);backdrop-filter:none;border:0;padding:6px 4px 12px;}
  .hero-stage{order:1;height:min(74svh,600px);min-height:400px;}
  .clockbar{order:2;}
  .counters{top:auto;bottom:clamp(10px,2vw,20px);right:auto;left:clamp(10px,2vw,24px);}
  .hero-stage .legend,.story-stage .legend{bottom:auto;top:clamp(10px,2vw,22px);max-width:calc(100% - 150px);}
}

/* share */
.share{max-width:760px;margin:0 auto;padding:.6rem 20px;}
.share-row{display:flex;gap:.45rem;align-items:center;flex-wrap:wrap;font-family:var(--sans);margin:.3rem 0;}
.share-row .lab{font-size:.84rem;color:var(--soft);margin-right:.2rem;}
.share-row a,.share-row button{width:40px;height:40px;border-radius:50%;border:1px solid var(--line-soft);background:transparent;color:var(--ink);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;}
.share-row a:hover,.share-row button:hover,.share-row a:focus-visible,.share-row button:focus-visible{color:var(--accent);border-color:var(--accent);}
@media (pointer:coarse){.share-row a,.share-row button{width:44px;height:44px;}}
.share-row [hidden]{display:none;}
.share-status{min-height:1.1em;font-size:.82rem;color:var(--soft);font-family:var(--sans);margin:0;}

/* prose */
.wrap{max-width:760px;margin:0 auto;padding:0 20px;}
h2{font-family:var(--display);font-weight:600;font-size:clamp(1.5rem,3vw,2rem);line-height:1.15;margin:3rem 0 .5rem;letter-spacing:-.008em;text-wrap:balance;}
h2 .anchor{color:inherit;text-decoration:none;}
h2 .anchor:hover{color:var(--accent);}
h3{font-family:var(--display);font-weight:600;font-size:1.25rem;margin:2rem 0 .3rem;}
.lede{font-size:1.1rem;color:var(--soft);}
section[id],[data-anchor]{scroll-margin-top:64px;}

/* story */
.story{position:relative;margin-top:1rem;}
.story-head{max-width:760px;margin:0 auto;padding:0 20px 1rem;}
.story-stage{position:sticky;top:50px;height:calc(100lvh - 50px);z-index:0;}
.story-steps{position:relative;z-index:2;margin-top:calc(-100lvh + 50px);padding:34vh 0 30vh;pointer-events:none;}
.step{pointer-events:auto;max-width:430px;margin:0 0 70vh clamp(14px,4vw,64px);background:color-mix(in srgb,var(--paper) 95%,transparent);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border:1px solid var(--line-soft);border-radius:16px;padding:1rem 1.2rem;box-shadow:0 10px 34px rgba(0,0,0,.3);opacity:.6;transition:opacity .4s;}
.step.on{opacity:1;}
.step:last-child{margin-bottom:0;}
.step .yr{font-family:var(--sans);font-weight:600;color:var(--accent);margin:0;font-size:.9rem;letter-spacing:.02em;}
.step h3{margin:.1rem 0 .35rem;font-size:1.22rem;}
.step p{margin:.45rem 0;font-size:1rem;line-height:1.6;}
@media (max-width:899px){
  .step{margin:0 12px 75vh;max-width:none;padding:.8rem .95rem;}
  .step p{font-size:.95rem;line-height:1.5;}
  .story-steps{padding-top:62vh;}
  .story-stage .counters{display:none;}
}

/* charts */
.fig-chart{margin:1.4rem 0;}
.fig-chart figcaption,.note{font-family:var(--sans);font-size:.8rem;color:var(--soft);line-height:1.45;margin-top:.3rem;}
.chart{width:100%;height:auto;display:block;font-family:var(--sans);}
.chart .grid{stroke:var(--line-soft);stroke-width:1;}
.chart .ax{font-size:12px;fill:var(--soft);}
.chart .band{fill:var(--band);}
.chart .s{fill:none;stroke-width:2.6;stroke-linejoin:round;}
.chart .s0{stroke:var(--s0);fill:var(--s0);} .chart path.s0{fill:none;}
.chart .s1{stroke:var(--s1);fill:var(--s1);} .chart path.s1{fill:none;}
.chart .s2{stroke:var(--s2);fill:var(--s2);} .chart path.s2{fill:none;}
.chart .s3{stroke:var(--s3);fill:var(--s3);} .chart path.s3{fill:none;}
.chart text.lab{font-size:12.5px;font-weight:600;stroke:none;}
.chart .cB{stroke:var(--c-b);} .chart .cIF{stroke:var(--c-if);}
.chart circle.cB,.chart rect.cB{fill:var(--c-b);} .chart circle.cIF,.chart rect.cIF{fill:var(--c-if);}
.chart .bandl{font-size:11px;}
.chart path.med{stroke:none;}
.chart path.s0.med{fill:var(--s0);} .chart path.s1.med{fill:var(--s1);} .chart path.s2.med{fill:var(--s2);} .chart path.s3.med{fill:var(--s3);}
.chart text.cB{fill:var(--c-b);stroke:none;} .chart text.cIF{fill:var(--c-if);stroke:none;}
.chart .dot{stroke:var(--paper);stroke-width:1.5;}
.duo{display:grid;gap:1rem;margin:1.2rem 0 .2rem;}
@media (min-width:640px){.duo{grid-template-columns:1fr 1fr;}}
.duo .fig-chart{margin:0;}

/* tables */
.tbl-wrap{overflow-x:auto;margin:1rem 0;border:1px solid var(--line-soft);border-radius:12px;}
table{border-collapse:collapse;width:100%;font-family:var(--sans);font-size:.84rem;}
th,td{text-align:left;padding:.42rem .6rem;border-bottom:1px solid var(--line-soft);vertical-align:middle;}
thead th{background:var(--wash);font-weight:600;white-space:nowrap;}
tbody th{font-weight:600;white-space:nowrap;}
tbody th small{font-weight:400;color:var(--soft);}
tr:last-child td,tr:last-child th{border-bottom:0;}
td.num{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums;}
.mini{display:inline-block;width:46px;height:6px;background:var(--line-soft);border-radius:3px;vertical-align:middle;margin-left:.3rem;overflow:hidden;}
.mini i{display:block;height:100%;background:var(--c-if);}
tr[hidden]{display:none;}
details.more{margin:1rem 0;}
details.more summary{cursor:pointer;font-family:var(--sans);font-weight:600;color:var(--link);}
.chap h3{font-size:1.15rem;}

/* quiz */
.q{border:1px solid var(--line-soft);border-radius:14px;padding:.8rem 1rem;margin:1rem 0;background:var(--card);}
.q legend{font-weight:600;padding:0 .2rem;}
.q label{display:flex;gap:.5rem;font-family:var(--sans);font-size:.95rem;padding:.3rem 0;cursor:pointer;min-height:44px;align-items:center;}
.q.right{border-color:#2f8a4a;}
.q.wrong{border-color:var(--s3);}
.why{font-family:var(--sans);font-size:.88rem;color:var(--soft);margin:.4rem 0 0;}
.q.right .why::before{content:'✓ ';color:#2f8a4a;font-weight:600;}
.q.wrong .why::before{content:'✗ ';color:var(--s3);font-weight:600;}
#quiz-out{font-family:var(--sans);font-weight:600;min-height:1.2em;}
.quiz-actions{display:flex;gap:.5rem;}

/* faq, sources, footer */
.faq dt{font-weight:600;margin-top:1rem;font-family:var(--display);font-size:1.1rem;}
.faq dd{margin:.2rem 0 0;}
.sources{font-size:.9rem;}
.sources li{margin:.35rem 0;overflow-wrap:anywhere;}
.foot{max-width:760px;margin:3rem auto 0;padding:1.4rem 20px 3rem;border-top:1px solid var(--line-soft);font-family:var(--sans);font-size:.85rem;color:var(--soft);}
.foot a{color:var(--link);}
.related a{display:inline-block;margin-right:.8rem;}

/* rail */
.rail{position:fixed;right:10px;top:50%;transform:translateY(-50%);z-index:20;display:none;flex-direction:column;gap:.35rem;font-family:var(--sans);}
@media (min-width:1280px){.rail{display:flex;}}
.rail a{display:flex;align-items:center;justify-content:flex-end;gap:.45rem;text-decoration:none;color:var(--soft);font-size:.74rem;}
.rail a span{opacity:0;transition:opacity .2s;background:var(--card);border:1px solid var(--line-soft);border-radius:6px;padding:0 .35rem;}
.rail a:hover span,.rail a:focus-visible span,.rail a[aria-current] span{opacity:1;}
.rail a i{width:8px;height:8px;border-radius:50%;background:var(--line);flex:none;}
.rail a[aria-current] i{background:var(--accent);transform:scale(1.4);}

.nf main{max-width:640px;margin:15vh auto;padding:0 20px;}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;}}
@media (max-width:599px){.tries button:nth-of-type(n+4){display:none;}.tkey{display:none;}}