/* Josh's NFL Elo: light design system.
   Cool neutrals, one blue accent (the same blue as "our model" in the charts). Team colors carry the
   win-chance bar; everything else stays neutral so each game reads at a glance. */
:root {
  color-scheme: light;
  --page: #f4f6f8;
  --card: #ffffff;
  --card-2: #f8fafb;
  --line: #e3e7ec;
  --line-strong: #cfd6de;
  --ink: #111418;
  --ink-2: #4a5361;
  --muted: #7a8492;
  --accent: #2a78d6;
  --accent-soft: #e8f1fc;
  --good: #237a4b;
  --bad: #c2412d;
  --shadow: 0 1px 2px rgba(17, 24, 39, 0.04), 0 10px 30px -18px rgba(17, 24, 39, 0.18);
  --r-lg: 16px;
  --r-md: 10px;
  --r-sm: 6px;
  --bar-h: 120px;             /* sticky header height, measured by app.js */
  --z-header: 10;
  --z-tooltip: 20;
  --sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--page); scroll-padding-top: var(--bar-h); }
html.snap { scroll-snap-type: y mandatory; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0; color: var(--ink); background: var(--page);
  font: 400 15px/1.55 var(--sans); font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--r-sm); }
h1, h2, h3 { text-wrap: balance; letter-spacing: -0.015em; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--card); padding: 8px 12px; border-radius: var(--r-md); z-index: var(--z-tooltip); }
.skip:focus { left: 12px; }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: var(--z-header); background: var(--card); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 24px; padding-top: 12px; }
.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; padding-bottom: 8px; }
.brand-mark { width: 26px; height: 26px; border-radius: 7px; background: var(--accent); display: grid; place-items: center; }
.brand-mark::after { content: ""; width: 10px; height: 10px; border-radius: 3px; background: #fff; }
h1 { font-size: 17px; font-weight: 650; margin: 0; }
.tagline { margin: 0; color: var(--muted); font-size: 13px; }
.tabs { display: flex; gap: 2px; overflow-x: auto; }
.tabs button {
  min-height: 44px; padding: 0 14px; border: 0; background: none; cursor: pointer;
  font: 500 14px var(--sans); color: var(--ink-2); border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.tabs button:hover { color: var(--ink); }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }

.week-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; padding: 10px 0 12px; border-top: 1px solid var(--line); width: 100%; }
.week-bar label { font-size: 13px; font-weight: 500; color: var(--muted); }
select {
  min-height: 36px; padding: 0 30px 0 12px; font: 500 14px var(--sans); color: var(--ink);
  background: var(--card) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%234a5361' fill='none' stroke-width='1.5'/%3E%3C/svg%3E") no-repeat right 11px center;
  border: 1px solid var(--line-strong); border-radius: var(--r-md); appearance: none; cursor: pointer;
}
.lock { font-size: 13px; color: var(--ink-2); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.lock::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--good); }
.lock.late::before { background: var(--bad); }
.lock:hover { color: var(--ink); text-decoration: underline; }
.backfill-note { font-size: 13px; color: var(--ink-2); background: #fff4e0; padding: 4px 10px; border-radius: var(--r-sm); }

main.wrap { padding-top: 4px; padding-bottom: 8px; }

/* ---------- This week: one game per screen ---------- */
.week-intro, .game { scroll-snap-align: start; }
.week-intro { padding: 26px 0 4px; }
.week-intro h2 { font-size: 28px; font-weight: 650; margin: 0 0 4px; }
.week-intro p { color: var(--ink-2); max-width: 62ch; margin: 0 0 4px; }
.week-intro .hint { color: var(--muted); font-size: 13px; }

.game { min-height: calc(100dvh - var(--bar-h)); padding: 22px 0 12px; }
.game-card {
  max-width: 880px; margin: 0 auto; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--shadow); padding: 22px 28px 18px;
}
.game-top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 20px; font-size: 13px; color: var(--ink-2); }
.game-top .slot { font-weight: 600; color: var(--ink); }
.pill { font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }
.pill.toss { background: var(--card-2); color: var(--muted); border: 1px solid var(--line); }
.pill.gap { background: #fdecea; color: var(--bad); cursor: help; }
.tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* Head-to-head: name + chance on each side */
.h2h { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.team-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.side.home .team-head { flex-direction: row-reverse; }
.team-name { display: flex; align-items: center; gap: 9px; font-size: 20px; font-weight: 650; letter-spacing: -0.015em; line-height: 1.2; }
.side.home .team-name { flex-direction: row-reverse; text-align: right; }
.sq { flex: none; width: 12px; height: 12px; border-radius: 3px; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12); }
.chance { font-size: 34px; font-weight: 700; letter-spacing: -0.03em; line-height: 1; color: var(--muted); }
.side.fav .chance { color: var(--ink); }
.meta { margin-top: 8px; font-size: 13px; color: var(--ink-2); }
.meta .last { color: var(--muted); }
.side.home .meta { text-align: right; }

.bar-wrap { margin: 18px 0 4px; }
.bar { position: relative; display: flex; height: 14px; border-radius: 7px; overflow: hidden; background: var(--line); }
.bar .seg { height: 100%; transition: opacity 0.2s; }
.bar .seg + .seg { border-left: 2px solid var(--card); }
.bar .dim { opacity: 0.35; }
.vegas-tick { position: absolute; top: 50%; width: 3px; height: 22px; transform: translateY(-50%); background: var(--ink); border-radius: 2px; box-shadow: 0 0 0 2px var(--card); }
.bar-outer { position: relative; }
.bar-outer .vegas-tick { z-index: 1; }
.bar-legend { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin-top: 6px; }

.lines { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 14px; font-size: 14px; color: var(--ink-2); }
.lines b { font-weight: 600; color: var(--ink); }
.lines .at { color: var(--muted); font-size: 13px; }

.why { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 10px; }
.why summary { cursor: pointer; list-style: none; font-size: 14px; font-weight: 600; color: var(--ink-2); min-height: 32px; display: inline-flex; align-items: center; gap: 8px; }
.why summary::-webkit-details-marker { display: none; }
.why summary::before { content: ""; width: 7px; height: 7px; border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); transition: transform 0.2s; }
.why[open] summary::before { transform: rotate(45deg); }
.why ul { margin: 6px 0 2px; padding-left: 20px; color: var(--ink-2); font-size: 14px; max-width: 70ch; }
.why li { margin: 3px 0; }
.result { margin-top: 12px; padding: 10px 14px; background: var(--card-2); border: 1px solid var(--line); border-radius: var(--r-md); font-size: 14px; display: flex; flex-wrap: wrap; gap: 4px 14px; align-items: center; }
.right { color: var(--good); font-weight: 600; }
.wrong { color: var(--bad); font-weight: 600; }

/* ---------- Shared panels (Record, Rankings, How) ---------- */
.panel-head { padding: 26px 0 4px; }
.panel-head h2 { font-size: 26px; font-weight: 650; margin: 0 0 6px; }
.panel-head p { color: var(--ink-2); margin: 0; max-width: 64ch; }
.big-line { font-size: 22px; font-weight: 650; letter-spacing: -0.015em; margin: 18px 0 4px; }
.sub { color: var(--ink-2); margin: 0 0 8px; max-width: 64ch; }
.surface { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--shadow); }
.chart-box { padding: 14px; margin: 18px 0; height: 320px; position: relative; }
details.more { padding: 12px 16px; margin: 12px 0; }
details.more summary { cursor: pointer; font-weight: 600; }
details.more ul { margin: 8px 0 2px; padding-left: 18px; color: var(--ink-2); }
.note { color: var(--muted); font-size: 13px; max-width: 70ch; }

.table-wrap { overflow-x: auto; margin-top: 16px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-size: 12px; font-weight: 600; color: var(--muted); cursor: pointer; user-select: none; background: var(--card-2); }
th[aria-sort="ascending"]::after { content: " ↑"; }
th[aria-sort="descending"]::after { content: " ↓"; }
td.num, th.num { text-align: right; }
tbody tr { cursor: pointer; transition: background 0.15s; }
tbody tr:hover { background: var(--card-2); }
tbody tr.picked { background: var(--accent-soft); }
tbody tr:last-child td { border-bottom: 0; }
.team-cell { display: inline-flex; align-items: center; gap: 8px; }
.up { color: var(--good); } .down { color: var(--bad); } .flat { color: var(--muted); }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--ink-2); margin: 8px 0 0; }
.legend i { display: inline-block; width: 14px; height: 3px; border-radius: 2px; vertical-align: middle; margin-right: 6px; }

.how-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 18px; }
.how-card { padding: 18px 20px; }
.how-card h3 { margin: 0 0 6px; font-size: 16px; font-weight: 600; }
.how-card p { margin: 0; color: var(--ink-2); }
h3.section { font-size: 17px; font-weight: 600; margin: 28px 0 10px; }
ol.steps { padding: 16px 20px 16px 40px; margin: 0; color: var(--ink-2); }
ol.steps li { margin: 4px 0; }
dl.glossary { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; padding: 16px 20px; margin: 0; }
dl.glossary dt { font-weight: 600; }
dl.glossary dd { margin: 0; color: var(--ink-2); }

/* ---------- Tooltips ---------- */
.term { border-bottom: 1px dotted var(--muted); cursor: help; }
.tooltip { position: fixed; z-index: var(--z-tooltip); max-width: 280px; background: var(--ink); color: #fff; padding: 7px 10px; border-radius: var(--r-md); font-size: 13px; line-height: 1.4; pointer-events: none; }

/* ---------- Footer ---------- */
.site-footer { scroll-snap-align: end; border-top: 1px solid var(--line); margin-top: 24px; padding: 18px 0 32px; color: var(--muted); font-size: 13px; background: var(--card); }
.site-footer p { margin: 4px 0; }

/* ---------- Small screens ---------- */
@media (max-width: 720px) {
  .tagline { display: none; }
  .brand { padding-bottom: 4px; }
  .tabs button { padding: 0 10px; font-size: 13.5px; }
  .game-card { padding: 18px 16px 14px; }
  .h2h { gap: 12px; }
  .team-name { font-size: 16px; gap: 7px; }
  .chance { font-size: 28px; }
  .team-head { flex-direction: column-reverse; align-items: flex-start; gap: 4px; }
  .side.home .team-head { flex-direction: column-reverse; align-items: flex-end; }
  .meta { font-size: 12px; }
  .how-grid { grid-template-columns: 1fr; }
  dl.glossary { grid-template-columns: 1fr; gap: 2px; } dl.glossary dd { margin-bottom: 8px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }