/* Umpire navy + stitch red on cool chalk paper; scorecard-like rules; field diagrams carry the colour. */
:root {
  --bg: #eef0f3; --surface: #ffffff; --ink: #14213d; --muted: #5a6478; --line: #d6dbe4;
  --accent: #c8102e; --accent-ink: #ffffff; --navy: #1b2d55;
  --good: #17784a; --good-bg: #e2f3ea; --bad: #b3261e; --bad-bg: #fbe6e4; --warn-bg: #fff3d6; --warn: #8a5a00;
  --font-display: "Avenir Next Condensed", "Roboto Condensed", "Arial Narrow", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1320; --surface: #151d2d; --ink: #e8ecf4; --muted: #9aa5ba; --line: #2a3550;
    --accent: #ff5468; --accent-ink: #1a0508; --navy: #9db7ff;
    --good: #46c98a; --good-bg: #11301f; --bad: #ff7a6e; --bad-bg: #3a1614; --warn-bg: #33270b; --warn: #f2c25c;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1320; --surface: #151d2d; --ink: #e8ecf4; --muted: #9aa5ba; --line: #2a3550;
  --accent: #ff5468; --accent-ink: #1a0508; --navy: #9db7ff;
  --good: #46c98a; --good-bg: #11301f; --bad: #ff7a6e; --bad-bg: #3a1614; --warn-bg: #33270b; --warn: #f2c25c;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font-family: var(--font-body); font-size: 16px; line-height: 1.5; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px 48px; }
header.top { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 12px 24px; padding: 28px 0 16px; border-bottom: 3px solid var(--ink); }
.brand small { display: block; font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
h1 { font-family: var(--font-display); font-weight: 700; font-size: clamp(2rem, 4.5vw, 2.9rem); line-height: 1; margin: 4px 0 0; letter-spacing: .01em; text-wrap: balance; }
h1 .stitch { color: var(--accent); }
.hdr-right { margin-left: auto; text-align: right; font-size: .9rem; color: var(--muted); }
.hdr-right b { color: var(--ink); font-variant-numeric: tabular-nums; }
nav.tabs { display: flex; gap: 4px; margin: 16px 0 20px; flex-wrap: wrap; }
.tab { font: 600 1rem var(--font-body); background: transparent; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 7px 16px; cursor: pointer; }
.tab:hover { color: var(--ink); border-color: var(--ink); }
.tab[aria-current="page"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
button { font-family: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
kbd { font: 600 .7rem var(--font-body); border: 1px solid currentColor; border-radius: 4px; padding: 0 4px; opacity: .6; margin-right: 8px; }

/* learn layout */
.learn { display: grid; grid-template-columns: 260px 1fr; gap: 24px; align-items: start; }
@media (max-width: 860px) { .learn { grid-template-columns: 1fr; } }
aside.side { display: grid; gap: 14px; position: sticky; top: 12px; }
@media (max-width: 860px) {
  aside.side { position: static; display: flex; flex-direction: column; }
  .learn { display: flex; flex-direction: column; align-items: stretch; gap: 18px; }
  .learn > aside.side { order: 2; width: 100%; align-items: stretch; }
  .learn > div { order: 1; width: 100%; }
  aside.side > #pools { order: 1; width: 100%; }
  aside.side > .filters { order: 2; width: 100%; }
}
#pools { display: grid; gap: 6px; }
@media (max-width: 860px) { #pools { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); } .poolbtn .pt { display: none; } }
.poolbtn { text-align: left; display: grid; grid-template-columns: 1fr auto; gap: 2px 8px; padding: 9px 12px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; color: var(--ink); cursor: pointer; }
.poolbtn:hover { border-color: var(--muted); }
.poolbtn.on { border-color: var(--ink); box-shadow: inset 4px 0 0 var(--accent); }
.poolbtn .pn { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; }
.poolbtn .pc { font-variant-numeric: tabular-nums; color: var(--muted); font-size: .85rem; align-self: center; }
.poolbtn .pt { grid-column: 1 / -1; font-size: .78rem; color: var(--muted); line-height: 1.3; }
.bar { grid-column: 1 / -1; height: 5px; border-radius: 3px; background: var(--line); display: flex; overflow: hidden; margin-top: 4px; }
.bar i { display: block; height: 100%; }
.okb { background: var(--good); } .badb { background: var(--bad); }
.filters { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px; display: grid; gap: 8px; font-size: .92rem; }
.filters label { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.filters select { font: inherit; padding: 5px 8px; border-radius: 6px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); width: 100%; }
.filters input { accent-color: var(--accent); width: 16px; height: 16px; }
.ghost { background: none; border: 0; color: var(--muted); text-decoration: underline; cursor: pointer; font-size: .85rem; padding: 4px 0; text-align: left; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px 24px; display: grid; gap: 16px; }
@media (max-width: 520px) { .card { padding: 16px; } }
.meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: .85rem; color: var(--muted); }
.pool { font-family: var(--font-display); font-weight: 700; font-size: .95rem; letter-spacing: .03em; padding: 1px 9px; border-radius: 4px; color: #fff; background: var(--navy); }
.pool.pA { background: #1b2d55; } .pool.pB { background: #2c5f2d; } .pool.pC { background: #8a2432; } .pool.pD { background: #6b4c12; } .pool.pE { background: #4a3a78; }
.pool { color: #fff !important; }
.st { margin-left: auto; font-weight: 600; padding: 1px 10px; border-radius: 999px; font-size: .8rem; }
.st.new { background: var(--line); color: var(--muted); } .st.ok { background: var(--good-bg); color: var(--good); } .st.bad { background: var(--bad-bg); color: var(--bad); }
.qtext { font-size: 1.28rem; line-height: 1.4; font-weight: 600; margin: 0; max-width: 68ch; text-wrap: pretty; }
.figs { display: flex; gap: 14px; overflow-x: auto; padding-bottom: 4px; }
.fig { margin: 0; flex: 1 1 0; min-width: min(300px, 82vw); max-width: 520px; position: relative; }
.fig.big { max-width: none; min-width: 0; }
.field { display: block; width: 100%; height: auto; border-radius: 8px; }
.fig figcaption { font-size: .88rem; color: var(--muted); margin-top: 6px; line-height: 1.4; }
.figtag { position: absolute; top: 8px; right: 8px; z-index: 1; background: rgba(13,22,40,.85); color: #fff; font-size: .72rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; padding: 2px 8px; border-radius: 4px; }
.figtag.sol { background: var(--good); color: #fff; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: .76rem; color: var(--muted); align-items: center; }
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.lg { display: inline-block; width: 11px; height: 11px; border-radius: 50%; }
.lg.def { background: #16264a; border: 1px solid #9fb6e8; } .lg.off { background: #e5383b; } .lg.ump { background: #202020; border-radius: 2px; }
.opts { display: flex; flex-wrap: wrap; gap: 10px; }
.opt { font: 600 1.05rem var(--font-body); padding: 11px 18px; min-width: 110px; border-radius: 8px; border: 2px solid var(--ink); background: var(--surface); color: var(--ink); cursor: pointer; text-align: left; }
.opt:hover:not(:disabled) { background: var(--ink); color: var(--surface); }
.opt:disabled { cursor: default; opacity: .55; }
.opt.dim { opacity: .55; }
.opt.chosen { box-shadow: 0 0 0 3px var(--surface), 0 0 0 5px currentColor; }
.opt.right, .opt.right:hover:not(:disabled) { opacity: 1; border-color: var(--good); background: var(--good-bg); color: var(--good); }
.opt.wrong, .opt.wrong:hover:not(:disabled) { opacity: 1; border-color: var(--bad); background: var(--bad-bg); color: var(--bad); text-decoration: line-through; }
.fb { display: grid; gap: 12px; }
.verdict { font-weight: 700; font-size: 1.05rem; padding: 10px 14px; border-radius: 8px; }
.verdict.ok { background: var(--good-bg); color: var(--good); } .verdict.no { background: var(--bad-bg); color: var(--bad); }
.ex { margin: 0; max-width: 70ch; }
.exlab { display: inline-block; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--warn); background: var(--warn-bg); padding: 1px 7px; border-radius: 4px; margin-right: 8px; vertical-align: 1px; }
.hint { margin: 0; color: var(--muted); font-size: .92rem; max-width: 70ch; }
.primary { font: 700 1rem var(--font-body); background: var(--accent); color: var(--accent-ink); border: 0; padding: 11px 18px; border-radius: 8px; cursor: pointer; justify-self: start; }
.primary:hover { filter: brightness(1.08); }
.primary:disabled { opacity: .45; cursor: default; filter: none; }
.model { display: grid; gap: 14px; }
.pts { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.pts label { display: grid; grid-template-columns: 20px 28px 1fr; gap: 8px; align-items: start; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.pts label:has(input:checked) { background: var(--good-bg); border-color: var(--good); }
.pts input { margin-top: 4px; accent-color: var(--good); width: 16px; height: 16px; }
.pv { font-family: var(--font-display); font-weight: 700; font-size: .95rem; text-align: center; background: var(--ink); color: var(--surface); border-radius: 4px; padding: 0 4px; line-height: 1.5; align-self: start; font-variant-numeric: tabular-nums; }
.score { font-size: 1rem; color: var(--muted); } .score b { font-size: 1.6rem; color: var(--ink); font-family: var(--font-display); font-variant-numeric: tabular-nums; }
.selfgrade { display: flex; flex-wrap: wrap; gap: 10px; }
.good-btn, .bad-btn { font: 600 .98rem var(--font-body); padding: 9px 16px; border-radius: 8px; cursor: pointer; border: 2px solid; background: var(--surface); }
.good-btn { color: var(--good); border-color: var(--good); } .good-btn:hover { background: var(--good-bg); }
.bad-btn { color: var(--bad); border-color: var(--bad); } .bad-btn:hover { background: var(--bad-bg); }
.cardnav { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 14px; }
.navbtn { font: 600 1rem var(--font-body); background: var(--surface); color: var(--ink); border: 1px solid var(--line); border-radius: 8px; padding: 9px 16px; cursor: pointer; }
.navbtn:hover { border-color: var(--ink); }
#lcount, #xcount { font-variant-numeric: tabular-nums; color: var(--muted); font-size: .92rem; }
.empty { padding: 40px; text-align: center; color: var(--muted); background: var(--surface); border: 1px dashed var(--line); border-radius: 12px; }

/* exam */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px 24px; display: grid; gap: 14px; }
.panel p { margin: 0; max-width: 72ch; }
.panel > *, .card > *, .catpool > * { min-width: 0; }
.h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.4rem; margin: 0; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); margin: 14px 0 6px; }
.tblwrap { overflow-x: auto; }
.tbl { border-collapse: collapse; width: 100%; font-size: .92rem; }
.tbl th, .tbl td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl thead th { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); border-bottom: 2px solid var(--ink); }
.num { text-align: right !important; font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.progress { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.progress i { display: block; height: 100%; background: var(--accent); transition: width .2s; }
.result { border-radius: 12px; padding: 18px 22px; display: grid; gap: 2px; }
.result.good { background: var(--good-bg); color: var(--good); } .result.pass { background: var(--warn-bg); color: var(--warn); } .result.fail { background: var(--bad-bg); color: var(--bad); }
.rlab { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 700; }
.rbig { font-family: var(--font-display); font-size: 2.2rem; font-weight: 700; line-height: 1.05; }
.rsub { font-variant-numeric: tabular-nums; }
.chip { display: inline-block; font-size: .78rem; font-weight: 700; padding: 1px 9px; border-radius: 999px; }
.chip.good { background: var(--good-bg); color: var(--good); } .chip.pass { background: var(--warn-bg); color: var(--warn); } .chip.fail { background: var(--bad-bg); color: var(--bad); }
.misslist { margin: 0; padding-left: 18px; display: grid; gap: 6px; font-size: .92rem; }
.linkbtn { background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 6px; padding: 1px 8px; cursor: pointer; font-weight: 600; font-size: .85rem; }
.linkbtn:hover { border-color: var(--accent); color: var(--accent); }
.row { display: flex; gap: 10px; flex-wrap: wrap; }

/* catalog */
.ctools { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 16px; }
.ctools input[type=search] { font: inherit; padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--ink); flex: 1 1 260px; max-width: 460px; }
.ctools label { display: flex; gap: 8px; align-items: center; cursor: pointer; font-size: .92rem; }
.catpool { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; margin-bottom: 16px; }
.catlist { list-style: none; margin: 0; padding: 0; }
.catlist > li { display: grid; grid-template-columns: 28px 1fr minmax(90px, auto) auto; gap: 10px; padding: 8px 0; border-top: 1px solid var(--line); align-items: start; font-size: .94rem; }
@media (max-width: 600px) { .catlist > li { grid-template-columns: 24px 1fr; } .catlist .ca, .catlist .linkbtn { grid-column: 2; justify-self: start; } }
.cn { font-family: var(--font-display); font-weight: 700; color: var(--muted); font-variant-numeric: tabular-nums; }
.ca .ans { font-weight: 700; color: var(--good); }
.hasfig { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; background: #5a9645; color: #fff; border-radius: 4px; padding: 0 6px; vertical-align: 1px; }
.mini { list-style: none; padding: 0; margin: 6px 0 0; display: grid; gap: 3px; font-size: .88rem; }
.mini li { display: grid; grid-template-columns: 24px 1fr; gap: 8px; }
.mini .ans { font-weight: 400; color: var(--ink); }
.hideans .ans { filter: blur(6px); transition: filter .15s; cursor: pointer; }
.hideans li:hover .ans, .hideans li:focus-within .ans { filter: none; }

/* cheat sheet */
.cgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr)); gap: 16px; margin-bottom: 12px; }
.cbox { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px; display: grid; gap: 12px; align-content: start; }
.small { font-size: .85rem; color: var(--muted); margin: 0; }
.ifm td, .ifm th { text-align: center; padding: 5px 4px; font-size: .82rem; }
.ifm td.yes { background: var(--good-bg); color: var(--good); font-weight: 700; }
.ifm td.no { color: var(--muted); }
.flow { list-style: none; counter-reset: f; margin: 0; padding: 0; display: grid; gap: 8px; }
.flow li { counter-increment: f; display: grid; grid-template-columns: 26px 1fr; gap: 4px 10px; align-items: start; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; }
.flow li::before { content: counter(f); grid-row: span 2; font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; color: var(--accent); }
.flow li > span { justify-self: start; }
.flow li > span:not(.chip) { font-size: .9rem; color: var(--muted); }
.note { font-size: .82rem; color: var(--muted); border-top: 1px solid var(--line); margin-top: 28px; padding-top: 12px; width: 100%; line-height: 1.6; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 24px; }
.note span:first-child { flex: 1 1 520px; }
/* ===== Phones: question first, big answer buttons ===== */
@media (max-width: 640px) {
  body { font-size: 15px; }
  .wrap { padding: 0 12px 88px; }
  header.top { padding: 10px 0 8px; border-bottom-width: 2px; gap: 2px 12px; align-items: baseline; }
  .brand small { display: none; }
  h1 { font-size: 1.35rem; margin: 0; }
  .hdr-right { font-size: .78rem; }
  .hdr-right, .h1x { display: none; }
  nav.tabs { flex-wrap: nowrap; overflow-x: auto; margin: 8px -12px 10px; padding: 0 12px; gap: 6px; scrollbar-width: none; }
  nav.tabs::-webkit-scrollbar { display: none; }
  .tab { font-size: .88rem; padding: 6px 12px; white-space: nowrap; flex: none; }
  .card { padding: 14px 14px 16px; gap: 14px; border-radius: 10px; }
  .card > .meta { order: 0; } .card > .qtext { order: 1; } .card > .opts { order: 2; } .card > .fb { order: 3; }
  .card > .hint { order: 2; } .card > .reveal { order: 3; } .card > .model { order: 4; }
  .card > .figs { order: 5; } .card > .legend { order: 6; }
  .qtext { font-size: 1.22rem; line-height: 1.38; }
  kbd { display: none; }
  .opts { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
  .opt { min-height: 58px; font-size: 1.15rem; text-align: center; padding: 12px; border-radius: 10px; }
  .primary.reveal { width: 100%; min-height: 54px; font-size: 1.08rem; }
  .selfgrade { display: grid; grid-template-columns: 1fr 1fr; }
  .good-btn, .bad-btn { min-height: 52px; font-size: 1.02rem; }
  .pts label { padding: 10px; }
  .figs { flex-direction: column; overflow-x: visible; }
  .fig { min-width: 0; max-width: none; }
  .cardnav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 5; margin: 0; padding: 10px 12px calc(10px + env(safe-area-inset-bottom)); background: var(--surface); border-top: 1px solid var(--line); box-shadow: 0 -6px 18px rgba(0,0,0,.08); }
  .cardnav .navbtn, .cardnav .primary { min-height: 48px; padding: 10px 18px; font-size: 1.02rem; }
  #exam-run .cardnav .primary { flex: 1; margin-left: 12px; }
  .panel, .catpool { padding: 14px; }
  #pools { grid-template-columns: repeat(2, 1fr); }
  .poolbtn { padding: 10px 12px; }
}
[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }