:root {
  --bg: #fbfbfa; --panel: #fff; --sunk: #f4f4f5;
  --line: #e4e4e7; --hair: #ededf0;
  --ink: #101012; --ink-2: #55555f; --ink-3: #9b9ba4;
  --easy: #15a349; --medium: #d08700; --hard: #dc2626;
  --none: #e2e2e6; --accent: #101012;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, sans-serif;
  --r: 12px;
}
:root[data-theme="dark"] {
  --bg: #08080a; --panel: #101013; --sunk: #161619;
  --line: #26262b; --hair: #1c1c20;
  --ink: #f7f7f8; --ink-2: #a0a0aa; --ink-3: #5c5c66;
  --easy: #34d27b; --medium: #f5b13d; --hard: #f76d6d;
  --none: #232328; --accent: #f7f7f8;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #08080a; --panel: #101013; --sunk: #161619;
    --line: #26262b; --hair: #1c1c20;
    --ink: #f7f7f8; --ink-2: #a0a0aa; --ink-3: #5c5c66;
    --easy: #34d27b; --medium: #f5b13d; --hard: #f76d6d;
    --none: #232328; --accent: #f7f7f8;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 15px; line-height: 1.55;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.02em; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 28px 120px; }
.mono { font-family: var(--mono); }
.tnum { font-variant-numeric: tabular-nums; }

/* ---- Skeleton, so the page has shape before the data lands ---- */
.skeleton { animation: pulse 1.4s ease-in-out infinite; background: var(--sunk); border-radius: 6px; }
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .45 } }
.gone { display: none !important; }

/* ---- Header ---- */
header.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 40px 0 0; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.brand b { color: var(--ink-2); font-weight: 500; }
.chips { display: flex; gap: 6px; }
.chip {
  font-family: var(--mono); font-size: 11px; padding: 7px 11px; border-radius: 8px;
  border: 1px solid var(--line); color: var(--ink-2); background: var(--panel);
  cursor: pointer; transition: transform .14s ease, border-color .14s ease, color .14s ease;
}
.chip:hover { transform: translateY(-1px); border-color: var(--ink-3); color: var(--ink); }

/* ---- Hero: the headline number carries the page ---- */
.hero { padding: 56px 0 44px; border-bottom: 1px solid var(--line); }
.hero h1 { font-family: var(--mono); font-size: clamp(30px, 5vw, 44px); font-weight: 700; letter-spacing: -0.035em; }
.hero .sub { color: var(--ink-2); margin-top: 10px; max-width: 58ch; font-size: 16px; }
.headline { display: flex; align-items: flex-end; gap: 28px; flex-wrap: wrap; margin-top: 34px; }
.big {
  font-family: var(--mono); font-weight: 700; letter-spacing: -0.05em;
  font-size: clamp(64px, 13vw, 132px); line-height: .84;
}
.big-meta { padding-bottom: 10px; }
.big-meta .l1 { font-family: var(--mono); font-size: 13px; color: var(--ink-2); }
.big-meta .l2 { font-family: var(--mono); font-size: 12px; color: var(--ink-3); margin-top: 3px; }

/* ---- Stat rail ---- */
.rail { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; margin: 36px 0 0; }
.rail .cellstat { background: var(--panel); padding: 16px 18px; transition: background .15s ease; }
.rail .cellstat:hover { background: var(--sunk); }
.cellstat .v { font-family: var(--mono); font-size: 22px; font-weight: 700; letter-spacing: -0.02em; }
.cellstat .k { font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: .09em; color: var(--ink-3); margin-top: 3px; }

/* ---- Section furniture ---- */
.sec { margin-top: 72px; }
.sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 6px; }
.sec-head h2 { font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3); }
.sec-head .note { font-family: var(--mono); font-size: 11px; color: var(--ink-3); }
.sec-lede { color: var(--ink-2); font-size: 14px; margin: 0 0 22px; max-width: 62ch; }

/* ---- Time scrubber ---- */
.scrub { display: flex; align-items: center; gap: 14px; padding: 14px 16px; margin-bottom: 26px;
  border: 1px solid var(--line); border-radius: var(--r); background: var(--panel); }
.play {
  width: 34px; height: 34px; flex: 0 0 34px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: var(--sunk); color: var(--ink);
  display: grid; place-items: center; transition: transform .14s ease, border-color .14s ease;
}
.play:hover { transform: scale(1.06); border-color: var(--ink-3); }
.play svg { width: 12px; height: 12px; fill: currentColor; }
.scrub input[type=range] { flex: 1; -webkit-appearance: none; appearance: none; height: 3px; border-radius: 999px;
  background: var(--line); outline: none; cursor: pointer; }
.scrub input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 15px; height: 15px; border-radius: 999px;
  background: var(--accent); border: 3px solid var(--panel); box-shadow: 0 0 0 1px var(--line); cursor: grab; }
.scrub input[type=range]::-moz-range-thumb { width: 15px; height: 15px; border-radius: 999px;
  background: var(--accent); border: 3px solid var(--panel); box-shadow: 0 0 0 1px var(--line); cursor: grab; }
.scrub .stamp { font-family: var(--mono); font-size: 12px; color: var(--ink-2); min-width: 152px; text-align: right; }
.scrub .stamp b { color: var(--ink); font-weight: 700; }

/* ---- Coverage map ---- */
.map { display: flex; flex-direction: column; gap: 22px; }
.crow { animation: rise .55s cubic-bezier(.16,1,.3,1) backwards; animation-delay: calc(var(--i) * 35ms); }
@keyframes rise { from { opacity: 0; transform: translateY(10px) } to { opacity: 1; transform: none } }
.crow-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 7px; }
.crow-head h3 { font-family: var(--mono); font-size: 12.5px; font-weight: 500; }
.crow-head .n { font-family: var(--mono); font-size: 11px; color: var(--ink-3); margin-left: auto; }
.crow-head .n b { color: var(--ink); font-weight: 700; }
.crow-head .pct { font-family: var(--mono); font-size: 11px; color: var(--ink-3); min-width: 34px; text-align: right; }
.cells { display: flex; flex-wrap: wrap; gap: 3px; }
.c {
  border-radius: 2px; background: var(--none); display: block;
  width: var(--s, 11px); height: var(--s, 11px);
  transition: transform .12s cubic-bezier(.16,1,.3,1), background-color .25s ease;
}
.c.e { background: var(--easy) } .c.m { background: var(--medium) } .c.h { background: var(--hard) }
.c.u { background: var(--ink-3) }
.c:hover { transform: scale(1.9); position: relative; z-index: 3;
  box-shadow: 0 0 0 2px var(--bg), 0 3px 10px rgba(0,0,0,.28); }
.crow.complete .crow-head h3 { color: var(--easy) }
.tick { font-size: 11px; opacity: .9 }
.legend { display: flex; flex-wrap: wrap; gap: 15px; margin-top: 22px;
  font-family: var(--mono); font-size: 11px; color: var(--ink-3); }
.legend span { display: inline-flex; align-items: center; gap: 6px }
.sw { width: 9px; height: 9px; border-radius: 2px; display: inline-block }

/* ---- Tooltip ---- */
#tip {
  position: fixed; pointer-events: none; z-index: 60; opacity: 0;
  transform: translate(-50%, -100%) translateY(-10px);
  background: var(--ink); color: var(--bg); font-family: var(--mono); font-size: 11px;
  padding: 7px 10px; border-radius: 7px; max-width: 280px; line-height: 1.4;
  transition: opacity .12s ease;
}
#tip.on { opacity: 1 }
#tip .t2 { opacity: .62; display: block; margin-top: 2px }

/* ---- Momentum sparkline ---- */
.spark { width: 100%; height: 84px; display: block; overflow: visible; }
.spark path.area { fill: var(--ink); opacity: .07 }
.spark path.line { fill: none; stroke: var(--ink); stroke-width: 1.75; stroke-linejoin: round; stroke-linecap: round }
.spark .gl { stroke: var(--hair); stroke-width: 1 }
.spark text { font-family: var(--mono); font-size: 9px; fill: var(--ink-3) }

/* ---- Two-up panels ---- */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.panel { border: 1px solid var(--line); border-radius: var(--r); background: var(--panel); padding: 18px 20px; }
.panel h4 { margin: 0 0 14px; font-family: var(--mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: .1em; color: var(--ink-3); font-weight: 500; }
.brow { display: grid; grid-template-columns: 78px 1fr 54px; align-items: center; gap: 11px; padding: 3px 0 }
.brow .bl { font-family: var(--mono); font-size: 11.5px; color: var(--ink-2) }
.brow .bn { font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); text-align: right }
.track { height: 6px; background: var(--sunk); border-radius: 999px; overflow: hidden }
.track i { display: block; height: 100%; border-radius: 999px; width: 0;
  transition: width .8s cubic-bezier(.16,1,.3,1) }
.track i.easy { background: var(--easy) } .track i.medium { background: var(--medium) }
.track i.hard { background: var(--hard) } .track i.flat { background: var(--ink-2) }

/* ---- Next up ---- */
.next { display: flex; flex-direction: column; gap: 2px }
.nx { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px;
  padding: 9px 10px; border-radius: 8px; transition: background .13s ease, padding-left .13s ease }
.nx:hover { background: var(--sunk); padding-left: 15px }
.nx .nt { font-size: 13.5px }
.nx .nm { font-family: var(--mono); font-size: 10.5px; color: var(--ink-3) }

/* ---- Lists ---- */
.items { list-style: none; margin: 0; padding: 0 }
.it { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 14px;
  padding: 11px 8px; border-bottom: 1px solid var(--hair);
  transition: background .13s ease, padding-left .13s ease }
.it:hover { background: var(--sunk); padding-left: 14px }
.it .ttl { font-size: 14px }
.it time { font-family: var(--mono); font-size: 11.5px; color: var(--ink-3) }
.pill { font-family: var(--mono); font-size: 9.5px; text-transform: uppercase; letter-spacing: .07em;
  padding: 2px 8px; border-radius: 999px; border: 1px solid currentColor }
.pill.easy { color: var(--easy) } .pill.medium { color: var(--medium) } .pill.hard { color: var(--hard) }
.pill.unrated { color: var(--ink-3) }

footer { margin-top: 84px; padding-top: 22px; border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-3);
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between }
footer a { color: var(--ink-2); border-bottom: 1px solid var(--line) }
footer a:hover { color: var(--ink) }

.err { border: 1px solid var(--line); border-radius: var(--r); padding: 22px;
  font-family: var(--mono); font-size: 12.5px; color: var(--ink-2); background: var(--panel) }

@media (max-width: 860px) {
  .rail { grid-template-columns: repeat(2, 1fr) }
  .duo { grid-template-columns: 1fr }
  .wrap { padding: 0 18px 90px }
  .scrub .stamp { min-width: 0 }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto }
  .crow { animation: none }
  * { transition-duration: .01ms !important }
}