/* Stage 9 — functional knowledge quiz, matched to the blue glass interface. */
.quiz-section { position: relative; }
.quiz-shell {
  --quiz-line: rgb(150 226 255 / 24%);
  position: relative;
  isolation: isolate;
  overflow: hidden;
  max-width: 62rem;
  margin: clamp(1.6rem, 3vw, 2.5rem) auto 0;
  padding: clamp(1.25rem, 4vw, 3rem);
  border: 1px solid rgb(151 226 255 / 34%);
  border-radius: clamp(1rem, 2.5vw, 1.8rem);
  background:
    radial-gradient(ellipse at 88% 0%, rgb(52 178 230 / 17%), transparent 34%),
    linear-gradient(145deg, rgb(13 57 91 / 79%), rgb(4 23 45 / 94%));
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 9%), 0 24px 64px rgb(0 7 23 / 28%);
  -webkit-backdrop-filter: blur(20px) saturate(135%);
  backdrop-filter: blur(20px) saturate(135%);
}
.quiz-shell::before {
  position: absolute;
  z-index: -1;
  top: -6.5rem;
  right: -5rem;
  width: 17rem;
  height: 17rem;
  border: 1px solid rgb(119 225 255 / 13%);
  border-radius: 50%;
  box-shadow: 0 0 0 2rem rgb(119 225 255 / 2%), 0 0 0 4rem rgb(119 225 255 / 2%);
  content: "";
  pointer-events: none;
}
.quiz-intro { max-width: 42rem; margin: 0 auto; padding: clamp(.5rem, 2.5vw, 1.5rem) 0; text-align: center; }
.quiz-intro__orb, .quiz-result__seal {
  display: grid;
  width: 4.7rem;
  aspect-ratio: 1;
  place-items: center;
  margin: 0 auto 1.25rem;
  border: 1px solid rgb(165 236 255 / 65%);
  border-radius: 50%;
  color: #e1f9ff;
  background: radial-gradient(circle at 35% 25%, rgb(137 232 255 / 33%), rgb(20 105 153 / 18%) 62%, rgb(6 33 62 / 70%));
  box-shadow: 0 0 0 7px rgb(107 220 255 / 5%), 0 0 32px rgb(52 192 255 / 18%), inset 0 1px 0 rgb(255 255 255 / 24%);
}
.quiz-intro__orb span { font-size: 2rem; font-weight: 750; }
.quiz-eyebrow { margin: 0; color: #8ce4ff; font-size: .72rem; font-weight: 800; letter-spacing: .18em; }
.quiz-intro h3, .quiz-result h3 { margin: .5rem 0 .75rem; color: #f5fcff; font-size: clamp(1.55rem, 3.2vw, 2.45rem); line-height: 1.16; text-wrap: balance; }
.quiz-intro > p:not(.quiz-eyebrow), .quiz-result__summary { max-width: 39rem; margin: 0 auto 1.5rem; color: #c4deed; line-height: 1.8; }
.quiz-button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  gap: .8rem;
  padding: .78rem 1.2rem;
  border: 1px solid transparent;
  border-radius: .8rem;
  font-weight: 750;
  line-height: 1.25;
  text-align: center;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
}
.quiz-button--primary { color: #06213a; background: linear-gradient(115deg, #c9f3ff, #78ddff); box-shadow: 0 8px 25px rgb(42 173 229 / 18%), inset 0 1px 0 rgb(255 255 255 / 85%); }
.quiz-button--primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 12px 30px rgb(42 173 229 / 28%), inset 0 1px 0 rgb(255 255 255 / 85%); }
.quiz-button:focus-visible { outline: 3px solid #e0faff; outline-offset: 4px; }
.quiz-button:disabled { cursor: not-allowed; opacity: .5; filter: saturate(.65); }
.quiz-player[hidden], .quiz-intro[hidden], .quiz-result[hidden], .quiz-feedback[hidden] { display: none !important; }
.quiz-topline { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.quiz-score { color: #ecfaff; font-size: .96rem; font-weight: 800; font-variant-numeric: tabular-nums; white-space: nowrap; }
.quiz-score span { color: #9abed2; font-size: .78rem; font-weight: 600; }
.quiz-progress { height: .38rem; overflow: hidden; margin: 1rem 0 clamp(1.5rem, 4vw, 2.7rem); border: 1px solid rgb(142 222 255 / 14%); border-radius: 999px; background: rgb(2 16 33 / 70%); }
.quiz-progress > span, .quiz-result__bar > span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #4ccfff, #d0f7ff); box-shadow: 0 0 18px rgb(61 201 255 / 42%); transition: width 260ms ease; }
.quiz-question__category { margin: 0 0 .55rem; color: #82dbff; font-size: .72rem; font-weight: 800; letter-spacing: .16em; }
.quiz-question__title { max-width: 48rem; margin: 0; color: #f5fbff; font-size: clamp(1.35rem, 2.6vw, 2rem); line-height: 1.28; text-wrap: balance; }
.quiz-question__title:focus { outline: none; }
.quiz-question__title:focus-visible { outline: 2px solid #99e8ff; outline-offset: .4rem; border-radius: .25rem; }
.quiz-question__hint { margin: .6rem 0 1.25rem; color: #a9c9dc; font-size: .92rem; }
.quiz-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.quiz-option {
  display: flex;
  min-width: 0;
  min-height: 4.15rem;
  align-items: center;
  gap: .85rem;
  padding: .85rem 1rem;
  border: 1px solid var(--quiz-line);
  border-radius: .9rem;
  color: #eaf7ff;
  background: linear-gradient(125deg, rgb(26 76 111 / 56%), rgb(9 39 68 / 76%));
  font-size: .97rem;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.quiz-option:hover:not(:disabled) { transform: translateY(-1px); border-color: rgb(148 229 255 / 76%); background: rgb(34 102 142 / 58%); box-shadow: 0 5px 20px rgb(0 12 31 / 15%); }
.quiz-option:focus-visible { outline: 3px solid #d8f7ff; outline-offset: 3px; }
.quiz-option:disabled { cursor: default; opacity: .8; }
.quiz-option__marker { display: grid; width: 2rem; min-width: 2rem; aspect-ratio: 1; place-items: center; border: 1px solid rgb(156 225 255 / 42%); border-radius: .6rem; color: #aeeaff; background: rgb(4 29 54 / 60%); font-size: .78rem; font-weight: 850; }
.quiz-option__text { overflow-wrap: anywhere; }
.quiz-option.is-correct { border-color: #71e6c5; background: linear-gradient(125deg, rgb(16 111 102 / 57%), rgb(6 52 62 / 78%)); opacity: 1; }
.quiz-option.is-correct .quiz-option__marker { border-color: #71e6c5; color: #041f28; background: #8af1d5; }
.quiz-option.is-wrong { border-color: #ffc18f; background: linear-gradient(125deg, rgb(128 74 43 / 47%), rgb(62 36 39 / 76%)); opacity: 1; }
.quiz-option.is-wrong .quiz-option__marker { border-color: #ffc18f; color: #2a160b; background: #ffd1aa; }
.quiz-feedback { margin-top: 1.2rem; padding: 1rem 1.15rem; border: 1px solid rgb(142 225 255 / 28%); border-radius: .85rem; background: rgb(7 29 52 / 80%); }
.quiz-feedback.is-success { border-color: rgb(113 230 197 / 65%); }
.quiz-feedback.is-retry { border-color: rgb(255 193 143 / 60%); }
.quiz-feedback__title { margin: 0 0 .3rem; color: #a6f2d9; font-weight: 850; }
.quiz-feedback.is-retry .quiz-feedback__title { color: #ffd0a6; }
.quiz-feedback > p:last-child { margin: 0; color: #c6dfec; line-height: 1.75; }
.quiz-controls { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 1.4rem; }
.quiz-control-note { color: #a3c3d5; font-size: .82rem; }
.quiz-result { text-align: center; }
.quiz-result__seal { width: 4.2rem; margin-bottom: 1rem; font-size: 1.8rem; }
.quiz-result h3 { margin-top: .45rem; }
.quiz-result__summary { margin-bottom: 1.15rem; }
.quiz-result__score { display: flex; align-items: baseline; justify-content: center; gap: .65rem; margin: .7rem 0 1rem; }
.quiz-result__score strong { color: #b7f1ff; font-size: clamp(2.2rem, 5vw, 3.4rem); line-height: 1; font-variant-numeric: tabular-nums; }
.quiz-result__score span { color: #b5cfdf; }
.quiz-result__bar { max-width: 25rem; height: .5rem; overflow: hidden; margin: 0 auto 1rem; border-radius: 999px; background: rgb(3 17 34 / 85%); }
.quiz-result__message { max-width: 42rem; margin: 0 auto 1.8rem; color: #c7e0ee; line-height: 1.8; }
.quiz-review { margin: 1.75rem 0; padding-top: 1.4rem; border-top: 1px solid rgb(150 226 255 / 20%); text-align: left; }
.quiz-review h4 { margin: 0 0 .9rem; color: #effaff; font-size: 1.12rem; }
.quiz-review ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; margin: 0; padding: 0; list-style: none; counter-reset: quiz-review; }
.quiz-review li { min-width: 0; padding: .9rem; border: 1px solid rgb(150 226 255 / 17%); border-radius: .8rem; background: rgb(4 24 45 / 48%); counter-increment: quiz-review; }
.quiz-review__status { display: inline-block; margin-bottom: .45rem; padding: .16rem .45rem; border-radius: .35rem; font-size: .68rem; font-weight: 800; letter-spacing: .04em; }
.quiz-review__status.is-correct { color: #b4ffe6; background: rgb(31 130 111 / 27%); }
.quiz-review__status.is-wrong { color: #ffddb9; background: rgb(153 85 49 / 28%); }
.quiz-review li strong { display: block; margin-bottom: .4rem; color: #effaff; line-height: 1.45; }
.quiz-review li p { margin: .3rem 0 0; color: #bbd5e4; font-size: .88rem; line-height: 1.65; overflow-wrap: anywhere; }
.quiz-review li .quiz-review__explanation { color: #8fb3c8; font-size: .82rem; }
.quiz-footnote { display: flex; align-items: flex-start; gap: .55rem; max-width: 62rem; margin: 1rem auto 0; color: #a8c5d8; font-size: .86rem; line-height: 1.7; }
.quiz-footnote > span { color: #8de5ff; }
@media (max-width: 700px) {
  .quiz-shell { padding: 1.1rem; border-radius: 1.1rem; }
  .quiz-intro { padding: .35rem 0 .7rem; }
  .quiz-options { grid-template-columns: minmax(0, 1fr); gap: .65rem; }
  .quiz-option { min-height: 3.65rem; padding: .75rem .8rem; }
  .quiz-controls { align-items: stretch; flex-direction: column; }
  .quiz-controls .quiz-button { width: 100%; }
  .quiz-control-note { order: 1; text-align: center; }
  .quiz-review ol { grid-template-columns: minmax(0, 1fr); }
  .quiz-topline { align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  .quiz-button, .quiz-progress > span, .quiz-result__bar > span, .quiz-option { transition: none !important; }
  .quiz-button--primary:hover:not(:disabled), .quiz-option:hover:not(:disabled) { transform: none; }
}