:root{
  --paper:#F6F7F5; --raise:#FFFFFF; --ink:#1A211F; --muted:#5E6B66;
  --rule:#DCE2DE; --accent:#2E6F5E; --accent-soft:#E4EFEA;
  --amber:#8C6115; --amber-soft:#F6EEDC; --brick:#9C4028; --brick-soft:#F7E6E1;
  --shadow:0 1px 2px rgba(26,33,31,.06), 0 8px 24px rgba(26,33,31,.05);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#111614; --raise:#182320; --ink:#E7EDEA; --muted:#94A39D;
    --rule:#24312C; --accent:#6FC0A8; --accent-soft:#1B2F29;
    --amber:#D8A94F; --amber-soft:#2C2519; --brick:#E08466; --brick-soft:#32201C;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
  }
}
:root[data-theme="dark"]{
  --paper:#111614; --raise:#182320; --ink:#E7EDEA; --muted:#94A39D;
  --rule:#24312C; --accent:#6FC0A8; --accent-soft:#1B2F29;
  --amber:#D8A94F; --amber-soft:#2C2519; --brick:#E08466; --brick-soft:#32201C;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
}

*{box-sizing:border-box}
html,body{margin:0}
body{
  background:var(--paper); color:var(--ink);
  font:400 16px/1.55 "IBM Plex Sans","Segoe UI",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.mono{font-family:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent); outline-offset:2px; border-radius:3px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

.wrap{max-width:980px; margin:0 auto; padding-inline:20px; padding-block:0 64px}

header.top{
  position:sticky; top:0; z-index:20; background:var(--paper);
  border-bottom:1px solid var(--rule); padding-block:12px; margin-bottom:22px;
}
.topline{display:flex; align-items:baseline; gap:14px; flex-wrap:wrap}
.brand{font-weight:600; letter-spacing:.01em; margin:0; font-size:15px}
.brand span{color:var(--muted); font-weight:400}
.topline .spacer{flex:1}
.topbtn{
  background:none; border:1px solid var(--rule); color:var(--muted);
  font:500 12px/1 "IBM Plex Sans",sans-serif; padding:7px 11px; border-radius:5px;
  cursor:pointer; letter-spacing:.02em; text-decoration:none; display:inline-block;
}
.topbtn:hover{border-color:var(--accent); color:var(--accent)}

.rail{margin-top:11px; display:flex; gap:2px; height:6px; align-items:stretch}
.rail i{flex:1; background:var(--rule); border-radius:1px; display:block}
.rail i.done{background:var(--accent)}
.rail i.here{background:var(--ink)}
.railmeta{
  display:flex; justify-content:space-between; gap:12px; margin-top:7px;
  font:500 12px/1.4 "IBM Plex Mono",monospace; color:var(--muted);
  font-variant-numeric:tabular-nums;
}

.card{
  background:var(--raise); border:1px solid var(--rule); border-radius:10px;
  box-shadow:var(--shadow); padding:22px 24px; margin-bottom:18px;
}
.eyebrow{
  font:600 11px/1 "IBM Plex Mono",monospace; letter-spacing:.09em;
  text-transform:uppercase; color:var(--muted); margin-bottom:12px;
}
h2.pagename{
  font:600 19px/1.35 "IBM Plex Sans",sans-serif; margin:0 0 4px; text-wrap:balance;
  word-break:break-word;
}
.pagemeta{font:400 13px/1.5 "IBM Plex Mono",monospace; color:var(--muted); margin:0 0 18px}
.pagemeta b{color:var(--ink); font-weight:500}

.openrow{display:flex; gap:12px; flex-wrap:wrap; align-items:center}
.openbtn{
  display:inline-flex; align-items:center; gap:9px; text-decoration:none;
  background:var(--accent); color:var(--paper); font:600 15px/1 "IBM Plex Sans",sans-serif;
  padding:13px 20px; border-radius:7px; border:1px solid var(--accent);
}
.openbtn:hover{filter:brightness(1.08)}
.openbtn .k{
  font:600 11px/1 "IBM Plex Mono",monospace; opacity:.8;
  border:1px solid currentColor; border-radius:3px; padding:2px 5px;
}
.opened{font:500 13px/1 "IBM Plex Sans",sans-serif; color:var(--accent)}

.ask{font:500 16px/1.5 "IBM Plex Sans",sans-serif; margin:0 0 4px}
.askhint{font:400 14px/1.55 Newsreader,Georgia,serif; color:var(--muted); margin:0 0 16px; max-width:62ch}
.choices{display:grid; gap:10px}
@media(min-width:640px){.choices{grid-template-columns:repeat(2,1fr)}}
@media(min-width:960px){.choices{grid-template-columns:repeat(4,1fr)}}
.choice{
  display:flex; gap:11px; align-items:flex-start; text-align:left; width:100%;
  background:var(--raise); border:1px solid var(--rule); border-radius:8px;
  padding:13px 14px; cursor:pointer; color:inherit; font:inherit;
}
.choice:hover{border-color:var(--accent)}
.choice[aria-pressed="true"]{border-color:var(--accent); background:var(--accent-soft)}
.choice .k{
  flex:none; width:22px; height:22px; display:grid; place-items:center;
  border:1px solid var(--rule); border-radius:4px; background:var(--paper);
  font:600 12px/1 "IBM Plex Mono",monospace; color:var(--muted);
}
.choice[aria-pressed="true"] .k{border-color:var(--accent); color:var(--accent)}
.choice b{display:block; font:600 14px/1.3 "IBM Plex Sans",sans-serif; margin-bottom:3px}
.choice span{display:block; font:400 12.5px/1.45 "IBM Plex Sans",sans-serif; color:var(--muted)}
.choice.warn[aria-pressed="true"]{border-color:var(--brick); background:var(--brick-soft)}
.choice.warn[aria-pressed="true"] .k{border-color:var(--brick); color:var(--brick)}

.entry{border-top:1px solid var(--rule); margin-top:20px; padding-top:18px}
.entry h3{font:600 14px/1.3 "IBM Plex Sans",sans-serif; margin:0 0 3px}
.entry .lede{font:400 13.5px/1.55 Newsreader,Georgia,serif; color:var(--muted); margin:0 0 16px; max-width:62ch}
.grid{display:grid; gap:14px; margin-bottom:14px}
@media(min-width:640px){
  .grid.two{grid-template-columns:1fr 1fr}
  .grid.three{grid-template-columns:repeat(3,1fr)}
}
.f{display:flex; flex-direction:column; gap:5px; min-width:0}
.f label{font:600 11px/1 "IBM Plex Mono",monospace; letter-spacing:.07em;
  text-transform:uppercase; color:var(--muted)}
.f .hint{font:400 12px/1.45 "IBM Plex Sans",sans-serif; color:var(--muted)}
.f input,.f select,.f textarea{
  font:400 14px/1.4 "IBM Plex Sans",sans-serif; color:var(--ink);
  background:var(--paper); border:1px solid var(--rule); border-radius:6px;
  padding:9px 10px; width:100%; min-width:0;
}
.f textarea{resize:vertical; min-height:74px}
.f input.mono,.f textarea.mono{font-family:"IBM Plex Mono",monospace; font-size:13px}
.f input:focus,.f select:focus,.f textarea:focus{border-color:var(--accent); outline:none;
  box-shadow:0 0 0 3px var(--accent-soft)}
.auto{font:400 12px/1.4 "IBM Plex Mono",monospace; color:var(--accent)}

.nav{display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-top:20px}
.nav .spacer{flex:1}
.btn{
  font:600 14px/1 "IBM Plex Sans",sans-serif; padding:12px 18px; border-radius:7px;
  border:1px solid var(--rule); background:var(--raise); color:var(--ink); cursor:pointer;
}
.btn:hover{border-color:var(--accent); color:var(--accent)}
.btn.primary{background:var(--accent); border-color:var(--accent); color:var(--paper)}
.btn.primary:hover{filter:brightness(1.08); color:var(--paper)}
.btn[disabled]{opacity:.45; cursor:not-allowed}
.saveflag{font:500 12px/1 "IBM Plex Mono",monospace; color:var(--muted)}
.saveflag.ok{color:var(--accent)}

.scrim{position:fixed; inset:0; background:rgba(10,14,13,.45); z-index:40; border:0; padding:0}
.drawer{
  position:fixed; top:0; right:0; bottom:0; width:min(560px,100%); z-index:41;
  background:var(--paper); border-left:1px solid var(--rule); overflow-y:auto;
  padding:26px 26px 60px;
}
.drawer h2{font:600 18px/1.3 "IBM Plex Sans",sans-serif; margin:0 0 14px}
.drawer h3{font:600 13px/1.3 "IBM Plex Sans",sans-serif; margin:22px 0 7px}
.drawer p,.drawer li{font:400 14.5px/1.6 Newsreader,Georgia,serif; color:var(--ink); max-width:60ch}
.drawer ul{padding-left:20px; margin:6px 0}
.kbd{font:500 12px/1 "IBM Plex Mono",monospace; border:1px solid var(--rule);
  border-radius:4px; padding:3px 6px; background:var(--raise)}
.drawer table{border-collapse:collapse; width:100%; font-size:13.5px; margin:8px 0}
.drawer td,.drawer th{border-bottom:1px solid var(--rule); padding:7px 8px; text-align:left; vertical-align:top}
.drawer th{font:600 11px/1 "IBM Plex Mono",monospace; letter-spacing:.06em; text-transform:uppercase; color:var(--muted)}

.done{text-align:center; padding:40px 20px}
.done h2{font:600 22px/1.3 "IBM Plex Sans",sans-serif; margin:0 0 8px}
.done p{color:var(--muted); max-width:54ch; margin:0 auto 20px;
  font:400 15px/1.6 Newsreader,Georgia,serif}
.tiles{display:grid; gap:12px; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); margin:22px 0}
.tile{border:1px solid var(--rule); border-radius:8px; padding:14px; background:var(--raise); text-align:left}
.tile b{display:block; font:600 26px/1 "IBM Plex Mono",monospace; font-variant-numeric:tabular-nums}
.tile span{font:500 11px/1 "IBM Plex Mono",monospace; letter-spacing:.07em;
  text-transform:uppercase; color:var(--muted)}

.skip{position:absolute; left:-9999px}
.skip:focus{left:12px; top:12px; z-index:60; background:var(--accent); color:var(--paper);
  padding:9px 13px; border-radius:6px}

/* ---------- precomputed change panel ---------- */
.card.quiet{background:transparent; box-shadow:none; border-style:dashed}
.diffcols{display:grid; gap:14px}
@media(min-width:760px){.diffcols{grid-template-columns:1fr 1fr}}
.diffcol{border-radius:8px; padding:12px 14px; min-width:0; overflow-x:auto}
.diffcol.rem{background:var(--amber-soft); border:1px solid var(--amber)}
.diffcol.add{background:var(--accent-soft); border:1px solid var(--accent)}
.difflabel{
  font:600 11px/1 "IBM Plex Mono",monospace; letter-spacing:.08em; text-transform:uppercase;
  margin:0 0 9px;
}
.diffcol.rem .difflabel{color:var(--amber)}
.diffcol.add .difflabel{color:var(--accent)}
.diffline{
  font:400 13.5px/1.5 "IBM Plex Sans",sans-serif; color:var(--ink);
  margin:0 0 7px; word-break:break-word;
}
.diffcol.rem .diffline{text-decoration:line-through; text-decoration-color:var(--amber); opacity:.85}
.diffline:last-child{margin-bottom:0}