@font-face{font-family:Fraunces;font-style:normal;font-weight:300 800;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+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;font-style:normal;font-weight:300 800;font-display:swap;src:url(fonts/fraunces-normal-latin-ext.woff2) format("woff2");unicode-range:U+0100-024F,U+0259,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20CF,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+2000-206F,U+2074,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+0100-024F,U+0259,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20CF,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Source Serif 4";font-style:italic;font-weight:300 700;font-display:swap;src:url(fonts/source-serif-4-italic-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+2000-206F}
@font-face{font-family:"Source Serif 4";font-style:italic;font-weight:300 700;font-display:swap;src:url(fonts/source-serif-4-italic-latin-ext.woff2) format("woff2");unicode-range:U+0100-024F,U+1E00-1EFF}

:root{
  --paper:#fbf6f3;--paper-2:#f4ebe6;--ink:#2a1d22;--ink-2:#5b4a50;--ink-3:#7a6870;--rule:#e3d5cf;
  --accent:#b8245a;--link:#a31f52;--focus:#2360c4;
  --party:#d6336c;--diary:#6741a8;--gift:#c77d1a;--news:#0090a0;--ded:#8c7a80;
  --line:#2a1d22;--you:#111;--glass:rgba(251,246,243,.92);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#17131a;--paper-2:#221c26;--ink:#f1e9ec;--ink-2:#cdbfc5;--ink-3:#a8989f;--rule:#3a3040;
  --accent:#f06595;--link:#ff8fb6;--focus:#8ab4ff;
  --party:#e75590;--diary:#9676d6;--gift:#c0802a;--news:#1ea3b0;--ded:#9a8a91;
  --line:#f1e9ec;--you:#fff;--glass:rgba(23,19,26,.92);color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#17131a;--paper-2:#221c26;--ink:#f1e9ec;--ink-2:#cdbfc5;--ink-3:#a8989f;--rule:#3a3040;
  --accent:#f06595;--link:#ff8fb6;--focus:#8ab4ff;
  --party:#e75590;--diary:#9676d6;--gift:#c0802a;--news:#1ea3b0;--ded:#9a8a91;
  --line:#f1e9ec;--you:#fff;--glass:rgba(23,19,26,.92);color-scheme:dark}

*{box-sizing:border-box}
html{scroll-padding-top:56px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1.1rem/1.62 "Source Serif 4",Georgia,serif}
a{color:var(--link);text-underline-offset:.18em}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--paper);padding:.5rem 1rem;z-index:30}
.skip:focus{left:8px;top:8px}
h1,h2,h3{font-family:Fraunces,Georgia,serif;font-weight:600;line-height:1.14;letter-spacing:-.01em}
h1{font-size:clamp(2rem,5.4vw,3.5rem);margin:.2em 0 .35em;max-width:18ch}
h2{font-size:clamp(1.5rem,3.2vw,2.1rem);margin:0 0 .6em}
h3{font-size:1.2rem;margin:1.4em 0 .4em}
p{margin:0 0 1em}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:.9rem;height:48px;padding:0 16px;background:var(--glass);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule);font:500 .9rem/1 "Source Serif 4",serif;white-space:nowrap}
.topbar a{color:var(--ink-2);text-decoration:none}
.topbar a:hover,.topbar a[aria-current="true"]{color:var(--ink);text-decoration:underline}
.home{font-weight:700;color:var(--ink)!important}
.topnav{display:flex;gap:.9rem;overflow-x:auto;scrollbar-width:none;min-width:0;flex:1 1 auto}
.topnav::-webkit-scrollbar{display:none}
.spacer{flex:0 0 0}
.lang{font-weight:700;letter-spacing:.04em;min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center}
.icon-btn{background:none;border:0;color:var(--ink);width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;border-radius:50%}
@media (max-width:560px){.home{display:none}}

main{display:block}
section{padding:3.2rem 16px;max-width:1180px;margin:0 auto}
.prose{max-width:40rem;margin-left:auto;margin-right:auto}
.kicker{font:600 .82rem/1.2 "Source Serif 4",serif;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0}
.deck{font-size:1.25rem;line-height:1.5;color:var(--ink-2);max-width:38rem}
.hero{padding-top:2.2rem;padding-bottom:1rem}

/* the chart */
figure{margin:0}
.river{margin-top:1.4rem}
.river .wrap{position:relative}
.river .yaxis{display:none}
.river .scroll{overflow-x:auto;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch;border-radius:6px}
.river svg{display:block;width:100%;min-width:760px;height:auto;font-family:"Source Serif 4",serif}
.river .grid line{stroke:var(--rule);stroke-width:1}
.river .axis text{fill:var(--ink-3);font-size:14px}
.river .axis text.big{fill:var(--ink-2);font-size:15px}
@media (max-width:760px){.river .legend{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin-right:-16px;padding-right:16px}.river .legend::-webkit-scrollbar{display:none}.river .legend li{flex:0 0 auto}.river .legend button{padding:.2rem .65rem;font-size:.88rem}.river .yaxis{display:block;position:absolute;left:0;top:0;height:100%;width:auto;min-width:0;z-index:2;pointer-events:none}.river .yaxis .bg{fill:var(--paper);opacity:.92}.river .axis text{font-size:17px}.river .axis text.big{font-size:18px}}
.river .mean{fill:none;stroke:var(--line);stroke-width:2;stroke-linejoin:round;opacity:.85}
.river .pt{stroke:var(--paper);stroke-width:1}
.river .g-party{fill:var(--party)}.river .g-diary{fill:var(--diary)}.river .g-gift,.river .g-poem{fill:var(--gift)}.river .g-news{fill:var(--news)}
.river .g-deduced{fill:none;stroke:var(--ded);stroke-width:1.6}
.river .est{fill:none;stroke:var(--news);stroke-width:2;stroke-dasharray:2 2}
.river.filtered .pt{opacity:.14}
.river.filtered .pt.on{opacity:1}
.river .you circle{fill:none;stroke:var(--you);stroke-width:2.2}
.river .you line{stroke:var(--you);stroke-width:1.2;stroke-dasharray:3 3}
.river .you text{fill:var(--ink);font-size:15px;font-weight:700;paint-order:stroke;stroke:var(--paper);stroke-width:4px}
.river .guess line{stroke:var(--accent);stroke-width:2}
.river .guess text{fill:var(--accent);font-size:13px;font-weight:700;paint-order:stroke;stroke:var(--paper);stroke-width:4px}
.river .note text{fill:var(--ink-2);font-size:13px;paint-order:stroke;stroke:var(--paper);stroke-width:4px}
.river .note line{stroke:var(--ink-3);stroke-width:1}
figcaption{font-size:.95rem;color:var(--ink-2);margin-top:.6rem;max-width:48rem}
.legend{display:flex;flex-wrap:wrap;gap:.4rem .5rem;margin:0 0 .6rem;padding:0;list-style:none}
.legend button{display:inline-flex;align-items:center;gap:.45rem;min-height:44px;padding:.35rem .8rem;border:1px solid var(--rule);border-radius:999px;background:var(--paper);color:var(--ink);font:inherit;font-size:.95rem;cursor:pointer}
.legend button[aria-pressed="true"]{border-color:var(--ink);background:var(--paper-2);font-weight:600}
.legend .sw{width:12px;height:12px;border-radius:50%;flex:0 0 12px}
.legend .n{color:var(--ink-3);font-variant-numeric:tabular-nums}
.sw.party{background:var(--party)}.sw.diary{background:var(--diary)}.sw.gift{background:var(--gift)}.sw.news{background:var(--news)}.sw.deduced{border:2px solid var(--ded)}
.meanlabel{display:inline-block;width:22px;height:0;border-top:2px solid var(--line);vertical-align:middle;margin-right:.35rem}
.tip{position:fixed;z-index:25;pointer-events:none;max-width:260px;background:var(--paper);color:var(--ink);border:1px solid var(--rule);box-shadow:0 6px 24px rgba(0,0,0,.18);border-radius:8px;padding:.5rem .7rem;font-size:.92rem;line-height:1.35}
.tip b{font-family:Fraunces,serif}

/* your spring */
.you-box{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:2rem;align-items:start;max-width:1080px;margin:0 auto}
@media (max-width:820px){.you-box{grid-template-columns:1fr}}
.ctrl{background:var(--paper-2);border:1px solid var(--rule);border-radius:14px;padding:1.2rem}
.ctrl label{display:block;font-weight:600;margin:.2rem 0 .4rem}
.ctrl input[type=number]{font:600 1.5rem/1.2 Fraunces,serif;width:8ch;padding:.35rem .5rem;border:1px solid var(--ink-3);border-radius:8px;background:var(--paper);color:var(--ink);min-height:48px}
.chips{display:flex;flex-wrap:wrap;gap:.4rem;margin:.6rem 0 1rem}
.chips button,.btn{min-height:44px;padding:.35rem .9rem;border-radius:999px;border:1px solid var(--rule);background:var(--paper);color:var(--ink);font:inherit;font-size:.95rem;cursor:pointer}
.btn{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:700;padding:.5rem 1.3rem}
:root[data-theme="dark"] .btn{color:#17131a}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn{color:#17131a}}
.cal{margin:.8rem 0 1rem}
.cal input[type=range]{width:100%;height:44px;accent-color:var(--accent);margin:0}
.cal .ticks{display:flex;justify-content:space-between;font-size:.85rem;color:var(--ink-3)}
.guessout{font:600 1.35rem/1.2 Fraunces,serif;margin:.2rem 0 .2rem}
.result{min-height:8rem}
.result .date{font:600 clamp(2rem,5vw,3rem)/1.05 Fraunces,serif;color:var(--accent);margin:.1em 0 .2em}
.result .src{color:var(--ink-2)}
.result .delta{font-weight:600}
.doc{font-style:italic}

/* tables */
.tbl{width:100%;border-collapse:collapse;font-size:.98rem;margin:1rem 0 1.4rem;font-variant-numeric:tabular-nums}
.tbl th,.tbl td{text-align:left;padding:.45rem .6rem;border-bottom:1px solid var(--rule);vertical-align:top}
.tbl thead th{font-weight:600;color:var(--ink-2);font-size:.88rem}
.tbl .sw{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:.4rem}
.wide{max-width:48rem;margin:0 auto}
.stat{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin:1.2rem 0 1.6rem}
.stat div{border-top:3px solid var(--accent);padding-top:.4rem}
.stat b{display:block;font:600 2rem/1.1 Fraunces,serif}
.stat span{font-size:.93rem;color:var(--ink-2)}
.sources li{margin:.3rem 0 .6rem;font-size:.97rem}
.foot{border-top:1px solid var(--rule);padding:1.5rem 16px 5rem;text-align:center;color:var(--ink-2);font-size:.95rem}
.to-top{position:fixed;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));z-index:15;min-width:48px;height:48px;border-radius:999px;border:1px solid var(--rule);background:var(--paper);color:var(--ink);display:inline-flex;align-items:center;gap:.3rem;padding:0 .9rem;font:600 .9rem "Source Serif 4",serif;cursor:pointer;box-shadow:0 4px 14px rgba(0,0,0,.15)}
.to-top[hidden]{display:none}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media (max-width:520px){.tbl{display:block;overflow-x:auto;font-size:.9rem}.tbl th,.tbl td{padding:.4rem .45rem}}