/* BoboEdu: study-games.css
   Topic filters, quiz questions, answer feedback, flashcards, results and progress panels. */

/* Topic filters */
.pool {
  display: grid;
  gap: 8px;
}
.pool .label {
  font-size: 15px;
  font-weight: 700;
  color: var(--muted);
}
.chips {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip {
  min-height: 40px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1.5px solid var(--line-strong);
  background: var(--surface);
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
}
.chip .ct {
  color: var(--muted);
  font-weight: 400;
  font-size: 14px;
  margin-left: 6px;
  font-variant-numeric: tabular-nums;
}
.chip[aria-pressed='true'] {
  background: var(--tint);
  color: var(--on-hl);
  border-color: var(--tint);
}
.chip[aria-pressed='true'] .ct {
  color: inherit;
  opacity: 0.75;
}
@media (hover: hover) {
  .chip[aria-pressed='false']:hover {
    border-color: var(--ink);
  }
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 28px;
  align-items: start;
}
body[data-mode='cards'] .layout {
  grid-template-columns: minmax(0, 1fr);
}
body[data-mode='cards'] .layout > aside {
  display: none;
}
body[data-mode='quiz'][data-quiz-view='intro'] .layout {
  grid-template-columns: minmax(0, 1fr);
}
body[data-mode='quiz'][data-quiz-view='intro'] .layout > aside {
  display: none;
}

/* The question card: a sheet of paper with the subject's colour along the top */
.card {
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: 22px;
  box-shadow: inset 0 7px 0 var(--tint);
  padding: clamp(22px, 3.6vw, 34px) clamp(18px, 3.6vw, 34px) clamp(18px, 3.6vw, 30px);
  display: grid;
  gap: 20px;
  min-width: 0;
  scroll-margin-top: 78px;
}
/* In flashcards mode the flip surface is the card. Keep references and controls below it. */
body[data-mode='cards'] .card {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  gap: 18px;
}
body[data-mode='shop'] .card {
  box-shadow: inset 0 7px 0 var(--hl);
}
.qmeta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px 12px;
  flex-wrap: wrap;
  font-size: 15px;
  color: var(--muted);
}
.qnum {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.qmeta > span:not(.qnum) {
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--bg);
  font-weight: 700;
  font-size: 14px;
}
.quiz-clock {
  font-variant-numeric: tabular-nums;
}
.quiz-settings {
  display: flex;
  align-items: end;
  gap: 22px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.quiz-settings[hidden] {
  display: none;
}
.quiz-setting {
  display: grid;
  gap: 7px;
}
.setting-label {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}
.setting-options {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.setting-options .chip {
  min-height: 38px;
  padding: 7px 11px;
}
.setting-options .ct {
  font-size: 12px;
}
.setting-note {
  flex-basis: 100%;
  margin: -10px 0 0;
  font-size: 14px;
  color: var(--muted);
}
button.chip:disabled {
  opacity: 0.45;
  cursor: default;
}
.mini {
  display: none;
  gap: 6px;
}
.mini .t {
  font-size: 14px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.prompt {
  margin: 0;
  max-width: 58ch;
  text-wrap: pretty;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.5vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.options {
  display: grid;
  gap: 10px;
}
.opt {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  min-height: 56px;
  padding: 12px 14px;
  text-align: left;
  line-height: 1.45;
  font-size: 17px;
  background: var(--surface);
  border: 1.5px solid var(--line-strong);
  border-radius: 14px;
  box-shadow: 0 2px 0 var(--line-strong);
  cursor: pointer;
  transition:
    border-color 0.15s,
    background-color 0.15s,
    transform 0.08s,
    box-shadow 0.08s;
}
.opt .txt {
  min-width: 0;
  padding-top: 3px;
  overflow-wrap: break-word;
}
.letter {
  flex: none;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--bg);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  text-transform: uppercase;
  color: var(--ink);
}
@media (hover: hover) {
  .opt:not([aria-disabled='true']):hover {
    border-color: var(--ink);
  }
  .opt:not([aria-disabled='true']):hover .letter {
    background: var(--tint);
    color: var(--on-hl);
  }
}
.opt:not([aria-disabled='true']):active {
  transform: translateY(2px);
  box-shadow: 0 0 0 var(--line-strong);
}
.opt[aria-disabled='true'] {
  cursor: default;
  box-shadow: none;
}
.opt.correct {
  border-color: var(--good);
  background: var(--good-soft);
}
.opt.correct .letter {
  background: var(--good);
  color: var(--on-good);
}
.opt.wrong {
  border-color: var(--bad);
  background: var(--bad-soft);
}
.opt.wrong .letter {
  background: var(--bad);
  color: var(--on-bad);
}
.opt.faded {
  color: var(--muted);
  background: var(--bg);
}

.explain {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--bg);
}
.explain p {
  margin: 0;
  max-width: 65ch;
}
.verdict {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
}
.verdict.good {
  color: var(--good);
}
.verdict.bad {
  color: var(--bad);
}

.nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
}
.nav .group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.hint {
  font-size: 14px;
  color: var(--muted);
}

/* Results */
.results {
  display: grid;
  gap: 16px;
}
.topic-analysis {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--bg);
}
.topic-analysis .eyebrow {
  margin: 0;
}
.topic-results {
  display: grid;
  gap: 5px;
  margin: 0;
  padding-left: 20px;
}
.eyebrow {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--ink);
}
.big {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(56px, 9vw, 88px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  margin: 0;
}
.analysis-time {
  margin: 0;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.analysis-topics {
  display: grid;
  gap: 10px;
}
.analysis-topic {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 12px;
  font-size: 15px;
}
.analysis-topic .n {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.analysis-topic .bar {
  grid-column: 1 / -1;
}
.analysis-note {
  margin: 0;
  color: var(--muted);
}
.wronglist {
  margin: 0;
  padding: 0;
  list-style: none;
}
.wronglist li + li {
  border-top: 1.5px solid var(--line);
}
.wronglist button {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: 12px 0;
  text-align: left;
  background: none;
  border: 0;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent);
  text-underline-offset: 4px;
}

/* Flashcards: index cards. The front has the red heading line and blue rules; the back is
   the same card turned over, with the subject's colour along the top. */
.flip {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  text-align: left;
  cursor: pointer;
  perspective: 1400px;
}
.flip .inner {
  display: grid;
  transform-style: preserve-3d;
  transition: transform 0.55s cubic-bezier(0.3, 0.7, 0.2, 1);
}
.flip.on .inner {
  transform: rotateY(180deg);
}
.face {
  grid-area: 1 / 1;
  min-height: 270px;
  padding: clamp(22px, 4vw, 36px);
  border-radius: 8px;
  display: grid;
  align-content: center;
  gap: 12px;
  background-color: var(--surface);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  box-shadow:
    0 1px 0 rgba(29, 32, 66, 0.1),
    0 14px 30px -14px rgba(29, 32, 66, 0.45),
    0 0 0 1.5px var(--line);
}
.face.front {
  align-content: start;
  padding-top: 18px;
  background-image:
    linear-gradient(var(--margin-line), var(--margin-line)),
    repeating-linear-gradient(to bottom, transparent 0 33px, var(--rule) 33px 35px);
  background-size:
    100% 2px,
    100% calc(100% - 60px);
  background-position:
    0 58px,
    0 60px;
  background-repeat: no-repeat;
}
.face.front .tag {
  margin-bottom: 22px;
}
.face.front .term {
  padding: 6px 0 2px;
}
.face.back {
  transform: rotateY(180deg);
  box-shadow:
    inset 0 7px 0 var(--tint),
    0 1px 0 rgba(29, 32, 66, 0.1),
    0 14px 30px -14px rgba(29, 32, 66, 0.45),
    0 0 0 1.5px var(--line);
}
.face .tag {
  justify-self: start;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--tint);
  color: var(--on-hl);
  font-size: 14px;
  font-weight: 700;
}
.face .term {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-wrap: balance;
  overflow-wrap: break-word;
}
.face .def {
  font-size: clamp(18px, 2vw, 20px);
  line-height: 1.55;
  max-width: 60ch;
  overflow-wrap: break-word;
}
.face .backterm {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--muted);
}
.face .tap {
  font-size: 14px;
  color: var(--muted);
}
/* Flashcard deck controls, source notes and optional SVG diagrams. */
.flashcard-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 15px;
}
.flashcard-position {
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.flashcard-topic {
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bg);
  font-size: 14px;
  font-weight: 700;
}
.card-reference-tab {
  margin-top: 2px;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}
.reference-tab-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 10px 16px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}
.reference-tab-label::-webkit-details-marker {
  display: none;
}
.reference-tab-label::after {
  content: '+';
  color: var(--accent);
  font-size: 22px;
  line-height: 1;
}
.card-reference-tab[open] .reference-tab-label::after {
  content: '−';
}
.card-reference-panel {
  display: grid;
  gap: 9px;
  padding: 0 16px 16px;
}
.reference-group-title {
  margin: 4px 0 0;
  font-size: 15px;
  font-weight: 800;
}
.card-reference {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}
.reference-source-link {
  display: inline-block;
  margin-left: 3px;
  color: var(--accent);
  font-weight: 700;
  text-underline-offset: 3px;
}
.reference-source-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}
.reference-style {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 2px;
}
.reference-style .setting-label {
  margin-right: 4px;
}
.reference-style-choice[aria-pressed='true'] {
  background: var(--tint);
  color: var(--on-hl);
  border-color: var(--tint);
}
/* Side panels */
aside {
  display: grid;
  gap: 22px;
  min-width: 0;
  align-items: start;
}
.side {
  display: grid;
  gap: 22px;
  min-width: 0;
}
.panel {
  display: grid;
  gap: 10px;
}
.panel h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
}
.score {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 40px;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 0;
}
.score svg {
  align-self: center;
  margin-right: 6px;
}
.score small {
  font-family: var(--font-ui);
  font-weight: 400;
  font-size: 15px;
  letter-spacing: 0;
  color: var(--muted);
  margin-left: 8px;
}
.sections {
  display: grid;
  gap: 10px;
}
.srow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 10px;
  font-size: 15px;
}
.srow .n {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}
.bar {
  grid-column: 1 / -1;
  height: 8px;
  background: var(--line);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
}
.bar i {
  display: block;
  height: 100%;
}
.bar .g {
  background: var(--good);
}
.bar .b {
  background: var(--bad);
}
.bar .w {
  background: var(--warn);
}
.mini .bar {
  height: 8px;
}

.cells {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 4px;
  max-width: 460px;
}
.cell {
  aspect-ratio: 1 / 1;
  min-height: 26px;
  padding: 0;
  border-radius: 7px;
  border: 1.5px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}
@supports not (aspect-ratio: 1 / 1) {
  .cell {
    height: 30px;
  }
}
.cell.ok {
  background: var(--good);
  border-color: var(--good);
  color: var(--on-good);
}
.cell.no {
  background-color: var(--bad);
  border-color: var(--bad);
  color: var(--on-bad);
  background-image: repeating-linear-gradient(
    135deg,
    transparent 0 4px,
    var(--status-stripe) 4px 6px
  );
}
.cell.lr {
  background-color: var(--warn);
  border-color: var(--warn);
  color: var(--on-warn);
  background-image: repeating-linear-gradient(
    135deg,
    transparent 0 4px,
    var(--status-stripe) 4px 6px
  );
}
.cell.cur {
  outline: 3px solid var(--ink);
  outline-offset: 1px;
}
.cell.out {
  opacity: 0.3;
}
.legend {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}
.tools {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tools:empty {
  display: none;
}
.switch {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
}
.toggle {
  position: relative;
  flex: none;
  width: 48px;
  height: 30px;
  border-radius: 999px;
  border: 1.5px solid var(--muted);
  background: var(--line-strong);
  cursor: pointer;
  padding: 0;
}
.toggle::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
  transition: transform 0.15s;
}
.toggle[aria-checked='true'] {
  background: var(--ink);
}
.toggle[aria-checked='true']::after {
  transform: translateX(18px);
}