:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --fg: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --accent: #b45309;
  --good: #15803d;
  --bad: #b91c1c;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1917;
    --surface: #292524;
    --fg: #f5f5f4;
    --muted: #a8a29e;
    --line: #44403c;
    --accent: #fbbf24;
    --good: #4ade80;
    --bad: #f87171;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0 auto;
  max-width: 960px;
  padding: 24px 16px 48px;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, sans-serif;
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

h2 {
  margin: 32px 0 4px;
  font-size: 20px;
  color: var(--accent);
}

.notice {
  margin: 0;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  background: var(--surface);
}

h1 a {
  color: inherit;
  text-decoration: none;
}

a {
  color: var(--accent);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 16px 0 0;
  padding: 0 0 8px;
  border-bottom: 1px solid var(--line);
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

nav a:hover {
  color: var(--fg);
}

nav a[aria-current="page"] {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-thickness: 2px;
}

nav.groups {
  gap: 4px 16px;
  margin: 0 0 8px;
  border-bottom: 0;
  font-size: 14px;
}

nav.groups a {
  font-weight: 400;
}

h2[id],
h3[id] {
  scroll-margin-top: 16px;
}

.intro,
.empty {
  margin: 0 0 16px;
  color: var(--muted);
}

.intro p,
.intro ul {
  margin: 0 0 8px;
}

.clips {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.clips > li {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.about > p {
  margin: 0 0 8px;
  font-weight: 600;
}

.about > p.credit {
  margin: -4px 0 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
}

.note {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 14px;
}

.note p {
  margin: 0;
}

audio {
  display: block;
  width: 100%;
}

/* The Real or Robot quiz. Plain CSS shows each verdict and keeps score by counting the picked buttons. */

.quiz {
  counter-reset: right answered;
}

/* Only the picked page of clips is shown (quiz.css). Hidden pages stay rendered so their answers still count. */
.quiz .group {
  height: 0;
  overflow: hidden;
  visibility: hidden;
}

.quiz .group h3 {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

/* Each clip is one row: label, player and the two buttons, with the verdict below once it's answered. */
.questions {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.questions > li {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.questions > li > p {
  flex: 0 0 4.5rem;
  margin: 0;
  font-weight: 600;
}

.questions > li > audio {
  flex: 1 1 14rem;
  width: auto;
  min-width: 0;
}

.quiz fieldset {
  display: flex;
  flex: 0 0 13rem;
  gap: 8px;
  margin: 0;
  padding: 0;
  border: 0;
}

@media (max-width: 600px) {
  .questions > li > p,
  .questions > li > audio,
  .quiz fieldset {
    flex-basis: 100%;
  }
}

.pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.quiz .pager label {
  flex: 0 0 auto;
  min-width: 7rem;
  background: var(--surface);
  color: var(--fg);
}

.quiz legend,
.quiz input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  opacity: 0;
}

.quiz label {
  flex: 1;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  text-align: center;
  font-weight: 600;
  cursor: pointer;
}

.quiz label:hover {
  border-color: var(--accent);
}

.quiz input:focus-visible + label {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.quiz input:checked + label {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--bg);
}

.quiz input.right:checked {
  counter-increment: right answered;
}

.quiz input.wrong:checked {
  counter-increment: answered;
}

/* Once a clip is answered, its buttons stop responding to clicks and the right one is outlined. */
.questions > li:has(input:checked) label {
  pointer-events: none;
}

.questions > li:has(input:checked) input.right + label {
  box-shadow: 0 0 0 2px var(--good);
}

.verdict {
  display: none;
  flex-basis: 100%;
  color: var(--muted);
  font-size: 14px;
}

.questions > li:has(input:checked) .verdict {
  display: block;
}

.verdict p {
  margin: 0;
}

.if-right,
.if-wrong {
  display: none;
  font-weight: 700;
}

.if-right {
  color: var(--good);
}

.if-wrong {
  color: var(--bad);
}

.questions > li:has(input.right:checked) .if-right,
.questions > li:has(input.wrong:checked) .if-wrong {
  display: block;
}

.score {
  position: sticky;
  bottom: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 12px;
  margin: 16px 0 0;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.score p {
  margin: 0;
}

.tally {
  font-weight: 700;
}

.tally::after {
  content: counter(right) " right of " counter(answered) " answered";
}

.total {
  color: var(--muted);
}

.score button {
  margin-left: auto;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font: inherit;
  cursor: pointer;
}

.credit .real {
  margin-left: 6px;
  padding: 1px 6px;
  border: 1px solid var(--good);
  border-radius: 4px;
  color: var(--good);
  font-size: 12px;
  font-weight: 600;
}

.credit .real {
  white-space: nowrap;
}

/* One clip per row on pages comparing real recordings with the bots: label and credit, then the player. */
.clips.rows {
  grid-template-columns: 1fr;
  gap: 8px;
}

.clips.rows > li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
}

.clips.rows > li > .about,
.clips.rows > li > audio {
  flex: 1 1 18rem;
  min-width: 0;
}

.clips.rows .about > :last-child {
  margin-bottom: 0;
}