[hidden] { display: none !important; }
:root {
  --bg: #f3f6f9;
  --card: #ffffff;
  --text: #13212c;
  --muted: #5d6f7d;
  --line: #d9e2ea;
  --accent: #0b5f8a;
  --accent-ink: #ffffff;
  --ok: #1d7a46;
  --ok-bg: #e2f4ea;
  --bad: #b3261e;
  --bad-bg: #fbe5e3;
  --warn: #8a5a00;
  --bar: #0b3d5c;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1419;
    --card: #17222b;
    --text: #e6edf2;
    --muted: #93a4b2;
    --line: #2a3a47;
    --accent: #4fb0e0;
    --accent-ink: #06202e;
    --ok: #6fd49b;
    --ok-bg: #173526;
    --bad: #ff8a80;
    --bad-bg: #3d1a18;
    --warn: #f0c060;
    --bar: #0a2536;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 17px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
  min-height: 100vh;
}
.bar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: .5rem;
  padding: calc(env(safe-area-inset-top) + .6rem) 1rem .6rem;
  background: var(--bar); color: #fff;
}
.bar h1 { font-size: 1.1rem; margin: 0; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#bar-extra { font-variant-numeric: tabular-nums; font-weight: 600; }
.icon-btn { background: none; border: 0; color: inherit; font-size: 1.7rem; line-height: 1; padding: 0 .4rem; cursor: pointer; }
main {
  max-width: 760px; margin: 0 auto;
  padding: 1rem max(1rem, env(safe-area-inset-left)) calc(2rem + env(safe-area-inset-bottom));
}
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem; margin-bottom: .9rem;
}
.muted { color: var(--muted); font-size: .9rem; }
.row { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: .7rem; margin-bottom: .9rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  min-height: 48px; padding: .6rem 1.1rem; border-radius: 12px;
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.block { width: 100%; }
.btn:disabled { opacity: .5; }
.tile { text-align: left; display: block; width: 100%; }
.tile h3 { margin: 0 0 .3rem; font-size: 1.05rem; }
.progress { height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; display: flex; margin: .5rem 0 .3rem; }
.progress > span { display: block; height: 100%; }
.progress .ok { background: var(--ok); }
.progress .seen { background: var(--accent); opacity: .45; }
.badge { display: inline-block; font-size: .78rem; font-weight: 700; padding: .1rem .5rem; border-radius: 999px; background: var(--line); color: var(--text); }
.badge.warn { background: var(--warn); color: var(--bg); }
.q-meta { display: flex; justify-content: space-between; gap: .5rem; font-size: .85rem; color: var(--muted); margin-bottom: .5rem; }
.q-text { font-size: 1.08rem; font-weight: 600; margin: 0 0 1rem; }
.opts { display: grid; gap: .55rem; }
.opt {
  display: flex; gap: .7rem; align-items: flex-start; text-align: left;
  width: 100%; min-height: 52px; padding: .75rem .9rem; border-radius: 12px;
  border: 2px solid var(--line); background: var(--card); color: var(--text); font: inherit; cursor: pointer;
}
.opt .l { font-weight: 800; text-transform: uppercase; min-width: 1.2rem; color: var(--muted); }
.opt.sel { border-color: var(--accent); }
.opt.right { border-color: var(--ok); background: var(--ok-bg); }
.opt.wrong { border-color: var(--bad); background: var(--bad-bg); }
.opt:disabled { cursor: default; color: var(--text); }
.feedback { margin-top: .9rem; font-weight: 700; }
.feedback.ok { color: var(--ok); }
.feedback.bad { color: var(--bad); }
.sources { margin-top: .6rem; font-size: .8rem; color: var(--muted); }
.navgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: .35rem; margin: .8rem 0; }
.navgrid button { height: 38px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--text); font: inherit; font-size: .85rem; cursor: pointer; }
.navgrid button.done { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.navgrid button.cur { outline: 3px solid var(--warn); }
.navgrid button.right { background: var(--ok-bg); border-color: var(--ok); }
.navgrid button.wrong { background: var(--bad-bg); border-color: var(--bad); }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: .45rem .3rem; border-bottom: 1px solid var(--line); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.pass { color: var(--ok); font-weight: 800; }
.fail { color: var(--bad); font-weight: 800; }
.bars { display: flex; align-items: flex-end; gap: 3px; height: 110px; margin-top: .6rem; }
.bars > div { flex: 1; display: flex; flex-direction: column-reverse; min-width: 4px; }
.bars .c { background: var(--ok); border-radius: 2px 2px 0 0; }
.bars .w { background: var(--bad); opacity: .7; }
input[type=password], select {
  width: 100%; min-height: 48px; padding: .6rem .8rem; border-radius: 12px;
  border: 1px solid var(--line); background: var(--card); color: var(--text); font: inherit;
}
.error { color: var(--bad); margin-top: .6rem; }
dialog#annex { width: 100vw; max-width: 100vw; height: 100vh; max-height: 100vh; margin: 0; padding: 0; border: 0; background: var(--bg); color: var(--text); }
dialog#annex::backdrop { background: rgba(0,0,0,.6); }
.annex-head { position: sticky; top: 0; display: flex; justify-content: space-between; align-items: center; padding: calc(env(safe-area-inset-top) + .6rem) 1rem .6rem; background: var(--bar); color: #fff; }
#annex-body { padding: .5rem; }
#annex-body img { width: 100%; height: auto; display: block; margin-bottom: .5rem; background: #fff; }
.center { text-align: center; }
h2 { font-size: 1.15rem; margin: 1.2rem 0 .6rem; }
.original { margin: -.4rem 0 1rem; }
.original summary { cursor: pointer; color: var(--accent); font-size: .9rem; font-weight: 600; padding: .3rem 0; }
.original img { cursor: zoom-in; display: block; width: 100%; height: auto; margin-top: .4rem; border-radius: 8px; border: 1px solid var(--line); background: #fff; }
@media (prefers-color-scheme: dark) { .original img { filter: invert(.9) hue-rotate(180deg); } }