:root {
  --ink: #0b0c0c;
  --bg: #ffffff;
  --white: #ffffff;
  --blue: #1d70b8;
  --yellow: #ffdd00;
  --green: #00703c;
  --green-shadow: #002d18;
  --red: #d4351c;
  --red-shadow: #55150d;
  --grey: #505a5f;
  --grey-light: #f3f2f1;
  --border: #b1b4b6;
  --correct-bg: #d2e8d5;
  --incorrect-bg: #f6d7d2;
}

:root[data-theme="dark"] {
  --ink: #f4f4f4;
  --bg: #0b0c0c;
  --blue: #6cabe0;
  --grey: #b1b4b6;
  --grey-light: #232323;
  --border: #3a3f42;
  --correct-bg: #12331f;
  --incorrect-bg: #3a1712;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #f4f4f4;
    --bg: #0b0c0c;
    --blue: #6cabe0;
    --grey: #b1b4b6;
    --grey-light: #232323;
    --border: #3a3f42;
    --correct-bg: #12331f;
    --incorrect-bg: #3a1712;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}

body {
  font-family: Arial, Helvetica, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.15s ease, color 0.15s ease;
}

a { color: var(--blue); }
a:focus, button:focus, .choice:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 0;
  box-shadow: 0 0 0 3px var(--ink);
}

header.bar {
  background: #0b0c0c;
  color: var(--white);
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}
header.bar .inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
header.bar .service {
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--white);
}
header.bar .tagline {
  font-size: 13px;
  color: #b1b4b6;
}

#theme-toggle {
  margin-left: auto;
  background: none;
  border: 1px solid #4c5257;
  color: #d8d8d8;
  font-family: inherit;
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  line-height: 1;
}
#theme-toggle:hover { border-color: #8a9297; color: var(--white); }
#theme-toggle .icon { font-size: 13px; }

.crumb {
  border-bottom: 1px solid var(--border);
  padding: 8px 20px;
  font-size: 14px;
}
.crumb .inner { max-width: 720px; margin: 0 auto; }
.crumb a { text-decoration: none; }
.crumb a:hover { text-decoration: underline; }

main {
  flex: 1;
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
  padding: 32px 20px 60px;
}

h1 {
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.15;
  margin: 0 0 8px;
}

.lede {
  color: var(--grey);
  font-size: 17px;
  line-height: 1.5;
  margin: 0 0 24px;
  max-width: 55ch;
}

.scoreboard {
  display: flex;
  gap: 24px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  margin-bottom: 28px;
  font-size: 15px;
}
.scoreboard dt { color: var(--grey); display: inline; }
.scoreboard dd { display: inline; margin: 0 0 0 6px; font-weight: 700; font-variant-numeric: tabular-nums; }
.scoreboard div { display: flex; gap: 0; }

.matchup {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 2px solid var(--ink);
}
@media (max-width: 480px) {
  .matchup { grid-template-columns: 1fr; }
}

.panel {
  padding: 24px 20px;
  position: relative;
}
.panel + .panel {
  border-left: 2px solid var(--ink);
}
@media (max-width: 480px) {
  .panel + .panel { border-left: none; border-top: 2px solid var(--ink); }
}

.panel .label {
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--grey);
  margin: 0 0 10px;
}
.panel .name {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 6px;
  min-height: 3.9em;
}
.panel .category {
  font-size: 13px;
  color: var(--grey);
  margin: 0 0 12px;
}
.panel .category:empty { display: none; }
.panel .date {
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}
.panel .date.hidden-date {
  color: var(--grey);
  letter-spacing: 0.04em;
}

.panel.correct { background: var(--correct-bg); }
.panel.incorrect { background: var(--incorrect-bg); }

.choices {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

button.choice {
  flex: 1;
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  padding: 12px 10px;
  background: var(--green);
  color: var(--white);
  border: 2px solid transparent;
  box-shadow: 0 3px 0 var(--green-shadow);
  cursor: pointer;
}
button.choice:active {
  box-shadow: none;
  transform: translateY(3px);
}
button.choice:disabled {
  cursor: default;
  opacity: 0.55;
}

.feedback {
  margin-top: 20px;
  padding: 14px 16px;
  border-left: 6px solid var(--ink);
  background: var(--grey-light);
  font-size: 16px;
  line-height: 1.5;
  display: none;
}
.feedback.show { display: block; }
.feedback.correct { border-color: var(--green); }
.feedback.incorrect { border-color: var(--red); }

.next-row {
  margin-top: 20px;
  display: none;
}
.next-row.show { display: block; }

button.primary {
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  padding: 12px 24px;
  background: var(--green);
  color: var(--white);
  border: 2px solid transparent;
  box-shadow: 0 3px 0 var(--green-shadow);
  cursor: pointer;
}
button.primary:active { box-shadow: none; transform: translateY(3px); }

.gameover {
  display: none;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 4px solid var(--ink);
}
.gameover.show { display: block; }
.gameover h2 { margin: 0 0 6px; font-size: 26px; }
.gameover p { color: var(--grey); font-size: 16px; margin: 0 0 18px; }
.gameover .actions { display: flex; gap: 12px; flex-wrap: wrap; }

button.secondary {
  font-family: inherit;
  font-size: 16px;
  padding: 10px 20px;
  background: var(--bg);
  color: var(--ink);
  border: 2px solid var(--ink);
  cursor: pointer;
}

.loading, .load-error {
  color: var(--grey);
  font-size: 16px;
}

footer.small-print {
  border-top: 1px solid var(--border);
  padding: 18px 20px 32px;
  font-size: 13px;
  color: var(--grey);
}
footer.small-print .inner { max-width: 720px; margin: 0 auto; }