:root{
  --paper:#F5F6F8; --card:#FFFFFF; --ink:#14181F; --ink-2:#4C5666;
  --muted:#798394; --rule:#DFE3E9;
  --school:#8E99A8; --holiday:#C8761E; --window:#1F6F5C; --peak:#A63D2F;
  --shadow:0 1px 2px rgba(20,24,31,.06),0 8px 24px rgba(20,24,31,.05);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#10131A; --card:#171B24; --ink:#EDF0F5; --ink-2:#AEB7C6;
    --muted:#8792A3; --rule:#262C38;
    --school:#5D6878; --holiday:#E39247; --window:#3DA187; --peak:#D06552;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"]{
  --paper:#10131A; --card:#171B24; --ink:#EDF0F5; --ink-2:#AEB7C6;
  --muted:#8792A3; --rule:#262C38;
  --school:#5D6878; --holiday:#E39247; --window:#3DA187; --peak:#D06552;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0; background:var(--paper); color:var(--ink);
  font-family:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px; line-height:1.6; -webkit-font-smoothing:antialiased}
.wrap{max-width:980px; margin:0 auto; padding:0 22px}
h1,h2,h3{font-family:Newsreader,Georgia,serif; font-weight:600; text-wrap:balance; margin:0}
h1{font-size:clamp(30px,4.6vw,46px); line-height:1.08; letter-spacing:-.012em}
h2{font-size:clamp(21px,2.6vw,28px); line-height:1.22}
h3{font-size:18px; line-height:1.3}
p{margin:0}
a{color:var(--ink); text-decoration-color:var(--rule); text-underline-offset:2px}
a:hover{text-decoration-color:currentColor}
a:focus-visible,button:focus-visible,select:focus-visible{outline:2px solid var(--window); outline-offset:2px}
.eyebrow{font-family:"IBM Plex Mono",ui-monospace,monospace; font-size:11px;
  letter-spacing:.14em; text-transform:uppercase; color:var(--muted)}
.lede{font-size:clamp(16.5px,1.8vw,19px); color:var(--ink-2); max-width:64ch; line-height:1.55}
.note{font-size:13.5px; color:var(--muted); max-width:72ch; line-height:1.6}
.stack{display:flex; flex-direction:column}
.g6{gap:6px} .g10{gap:10px} .g14{gap:14px} .g22{gap:22px} .g34{gap:34px}
nav.top{border-bottom:1px solid var(--rule); background:var(--card)}
nav.top .wrap{display:flex; gap:18px; align-items:center; padding-top:13px; padding-bottom:13px;
  flex-wrap:wrap}
nav.top a{font-size:14px; text-decoration:none; color:var(--ink-2)}
nav.top a.brand{font-family:Newsreader,Georgia,serif; font-size:17px; color:var(--ink); margin-right:auto}
header.pg{padding:46px 0 26px; border-bottom:1px solid var(--rule)}
section{padding:34px 0; border-bottom:1px solid var(--rule)}
section:last-of-type{border-bottom:0}
.card{background:var(--card); border:1px solid var(--rule); border-radius:4px;
  padding:16px 18px; box-shadow:var(--shadow)}
.cards{display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:13px}
.card .k{font-family:"IBM Plex Mono",monospace; font-size:11.5px; color:var(--muted); letter-spacing:.05em}
.card .v{font-family:Newsreader,Georgia,serif; font-size:27px; line-height:1.15; margin-top:3px}
.card.win .v{color:var(--window)} .card.peak .v{color:var(--peak)}
.card .s{font-size:13.5px; color:var(--ink-2); margin-top:5px}
.tw{overflow-x:auto}
table{width:100%; border-collapse:collapse; font-size:14.5px; min-width:520px}
caption{text-align:left; font-family:"IBM Plex Mono",monospace; font-size:11px;
  letter-spacing:.09em; text-transform:uppercase; color:var(--muted); padding-bottom:8px}
th,td{text-align:left; padding:8px 12px; border-bottom:1px solid var(--rule)}
th{font-family:"IBM Plex Mono",monospace; font-size:11px; letter-spacing:.08em;
  text-transform:uppercase; color:var(--muted); font-weight:500}
td.num{font-family:"IBM Plex Mono",monospace; font-variant-numeric:tabular-nums; white-space:nowrap}
tr.hol td{color:var(--ink-2)}
tr.hol td:first-child{color:var(--holiday)}
.pill{display:inline-block; padding:2px 8px; border-radius:999px; font-size:11.5px;
  font-family:"IBM Plex Mono",monospace; border:1px solid currentColor; white-space:nowrap}
.pill.win{color:var(--window)} .pill.peak{color:var(--peak)} .pill.same{color:var(--muted)}
.wcard{background:var(--card); border:1px solid var(--rule); border-radius:4px;
  box-shadow:var(--shadow); overflow:hidden; display:grid; grid-template-columns:minmax(200px,258px) 1fr}
@media (max-width:740px){ .wcard{grid-template-columns:1fr} }
.wcard .when{padding:16px 18px; border-right:1px solid var(--rule);
  background:color-mix(in srgb, var(--muted) 7%, transparent)}
@media (max-width:740px){ .wcard .when{border-right:0; border-bottom:1px solid var(--rule)} }
.wcard .lab{font-family:Newsreader,Georgia,serif; font-size:19px; line-height:1.2}
.wcard .dates{font-family:"IBM Plex Mono",monospace; font-size:12px; color:var(--ink-2);
  margin-top:5px; font-variant-numeric:tabular-nums}
.chips{display:flex; flex-wrap:wrap; gap:6px; margin-top:11px}
.chip{font-family:"IBM Plex Mono",monospace; font-size:10.5px; padding:3px 7px; border-radius:3px;
  border:1px solid var(--rule); color:var(--muted); background:var(--card); white-space:nowrap}
.chip.win{color:var(--window); border-color:currentColor}
.chip.peak{color:var(--peak); border-color:currentColor}
.wcard .body{padding:16px 20px}
.wcard .body h3{font-family:Newsreader,Georgia,serif; font-size:18px; margin-bottom:8px}
.wcard .body ul{margin:0; padding-left:18px; display:flex; flex-direction:column; gap:6px}
.wcard .body li{font-size:14.5px; color:var(--ink-2); line-height:1.55}
.windows{display:grid; gap:13px}
.az{columns:200px; column-gap:22px}
.az a{display:block; padding:4px 0; font-size:14.5px; text-decoration:none; break-inside:avoid}
.az a:hover{text-decoration:underline}
.srcline{font-size:13px; color:var(--muted)}
footer{padding:34px 0 60px; color:var(--muted); font-size:13px}
footer a{color:var(--muted)}
footer .fl{display:flex; gap:16px; flex-wrap:wrap; margin-bottom:10px}

/* --- instant-value hero --- */
.hero-do{background:var(--card); border:1px solid var(--rule); border-radius:5px;
  box-shadow:var(--shadow); padding:20px 22px; margin-top:8px}
.finder{display:flex; gap:9px; flex-wrap:wrap; align-items:stretch}
.finder input{flex:1 1 260px; min-width:0; font-family:"IBM Plex Sans",sans-serif;
  font-size:16px; color:var(--ink); background:var(--paper);
  border:1px solid var(--rule); border-radius:4px; padding:12px 13px}
.finder button{font-family:"IBM Plex Sans",sans-serif; font-size:15px; font-weight:600;
  border:1px solid var(--window); background:var(--window); color:#fff;
  border-radius:4px; padding:12px 20px; cursor:pointer; white-space:nowrap}
.finder button:hover{filter:brightness(1.08)}
.finder-hint{font-size:13px; color:var(--muted); margin-top:9px}
.finder-hint a{color:var(--muted)}

/* --- next break panel --- */
.next{background:var(--card); border:1px solid var(--rule); border-left:3px solid var(--window);
  border-radius:4px; box-shadow:var(--shadow); padding:18px 20px;
  display:flex; flex-wrap:wrap; gap:22px; align-items:baseline}
.next .cd{font-family:Newsreader,Georgia,serif; font-size:40px; line-height:1; color:var(--window)}
.next .cd small{font-family:"IBM Plex Mono",monospace; font-size:12px; color:var(--muted);
  display:block; letter-spacing:.08em; margin-top:5px}
.next .txt{flex:1 1 300px; min-width:250px}
.next .txt .h{font-family:Newsreader,Georgia,serif; font-size:21px; line-height:1.25}
.next .txt .d{font-size:14px; color:var(--ink-2); margin-top:4px;
  font-variant-numeric:tabular-nums}
.next.is-peak{border-left-color:var(--peak)} .next.is-peak .cd{color:var(--peak)}
.next.is-win{border-left-color:var(--window)}

/* --- calls to action --- */
.cta{display:flex; flex-wrap:wrap; gap:10px; margin-top:4px}
.btn{display:inline-block; font-size:14.5px; font-weight:500; text-decoration:none;
  border:1px solid var(--rule); background:var(--card); color:var(--ink);
  border-radius:4px; padding:10px 16px}
.btn:hover{border-color:var(--ink-2)}
.btn.primary{background:var(--window); border-color:var(--window); color:#fff}
.btn.primary:hover{filter:brightness(1.08)}
.what{display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:14px}
.what div{background:var(--card); border:1px solid var(--rule); border-radius:4px;
  padding:15px 17px; box-shadow:var(--shadow)}
.what .n{font-family:"IBM Plex Mono",monospace; font-size:11px; letter-spacing:.1em;
  color:var(--muted); text-transform:uppercase}
.what h3{margin:6px 0 5px}
.what p{font-size:14px; color:var(--ink-2); line-height:1.55}

/* --- fine calculator --- */
.calc{display:grid; grid-template-columns:repeat(auto-fit,minmax(155px,1fr)); gap:13px;
  background:var(--card); border:1px solid var(--rule); border-radius:4px;
  padding:19px; box-shadow:var(--shadow)}
.calc label{display:flex; flex-direction:column; gap:5px}
.calc select,.calc input{font-family:"IBM Plex Sans",sans-serif; font-size:15px;
  color:var(--ink); background:var(--paper); border:1px solid var(--rule);
  border-radius:3px; padding:9px 11px}
.verdict{margin-top:15px; padding:18px 20px; border-radius:4px;
  border:1px solid var(--rule); border-left:3px solid var(--window);
  background:var(--card); box-shadow:var(--shadow)}
.verdict .headline{font-family:Newsreader,Georgia,serif; font-size:25px; line-height:1.22}
.verdict .detail{color:var(--ink-2); font-size:14.5px; margin-top:8px}
.nojs{display:none}
/* Used on the finder's label: screen readers need it, sighted users have the
   placeholder. Without this rule the label simply renders as stray text. */
.visually-hidden{position:absolute; width:1px; height:1px; margin:-1px; padding:0;
  overflow:hidden; clip:rect(0 0 0 0); clip-path:inset(50%); white-space:nowrap; border:0}