/* ============================================================
   quiz.css — REVISION IQA 10067 / AIRCRAFT MANUFACTURING
   ============================================================
   Loaded AFTER the site's style.css, so the header, tab bars and
   footer keep looking like the rest of the site and only the
   quiz itself gets a technical aircraft-production treatment.

   Written mobile-first: the plain rules describe the phone
   layout, and the media queries near the bottom add what a
   bigger screen can afford. Everything is comfortable at 360px.
   ============================================================ */


/* ------------------------------------------------------------
   PALETTE
   ------------------------------------------------------------
   Midnight navy, graphite and steel form the working palette.
   Muted copper marks actions; red and green remain reserved for
   wrong and correct feedback.
   ------------------------------------------------------------ */
.quiz-root {
  --q-deep:      #101c2b;
  --q-deep-2:    #1d3044;
  --q-teal:    #3b6579;
  --q-accent:   #c99a64;
  --q-gold:      #e4c38f;
  --q-sky:      #8ec5d8;
  --q-green:     #16a34a;
  --q-green-lit: #22c55e;
  --q-red:       #dc2626;

  --q-ink:       #ffffff;
  --q-ink-soft:  rgba(255, 255, 255, 0.78);
  --q-ink-faint: rgba(255, 255, 255, 0.55);

  --q-card:      rgba(255, 255, 255, 0.09);
  --q-card-line: rgba(255, 255, 255, 0.20);

  --q-radius:    16px;
  --q-radius-lg: 22px;

  /* 48px keeps every tappable thing at or above the size a
     thumb can hit reliably. */
  --q-tap:       48px;
}


/* ------------------------------------------------------------
   THE STAGE
   ------------------------------------------------------------ */
.quiz-root {
  position: relative;
  color: var(--q-ink);
  background:
    linear-gradient(rgba(170, 198, 213, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(170, 198, 213, 0.055) 1px, transparent 1px),
    radial-gradient(circle at 82% 12%, rgba(142, 197, 216, 0.16), transparent 38%),
    linear-gradient(160deg, var(--q-deep) 0%, var(--q-deep-2) 58%, #111b29 100%);
  background-size: 34px 34px, 34px 34px, auto, auto;

  /* Respect the notch and the home indicator on a phone. */
  padding:
    24px
    max(16px, env(safe-area-inset-right))
    max(28px, env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));

  min-height: 78vh;
  overflow: hidden;   /* keeps the decorative blobs off the scrollbar */
}

.quiz-root::before {
  content: "";
  position: absolute;
  right: -12%;
  top: 11%;
  width: min(65vw, 660px);
  height: 240px;
  opacity: 0.09;
  background: #d7e8ef;
  clip-path: polygon(0 59%, 69% 31%, 100% 0, 78% 52%, 100% 68%, 79% 74%, 63% 100%, 48% 72%);
  pointer-events: none;
}

/* While a question is on screen the quiz takes the whole
   viewport, so a phone shows the game and nothing else. */
body.quiz-playing .site-header,
body.quiz-playing .tab-bar,
body.quiz-playing .subtab-bar,
body.quiz-playing .site-footer,
body.quiz-playing .quiz-intro-block {
  display: none;
}

body.quiz-playing .quiz-root {
  min-height: 100vh;
  min-height: 100dvh;   /* dvh accounts for the mobile browser bar */
}

.quiz-screen {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.quiz-screen[hidden] { display: none; }


/* ------------------------------------------------------------
   SHARED PIECES
   ------------------------------------------------------------ */
.quiz-title {
  font-size: clamp(2rem, 9vw, 3.1rem);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 0;
  background: linear-gradient(100deg, #fff 10%, #d9e6ec 52%, var(--q-gold) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  /* Fallback for anything that cannot clip a gradient to text. */
  -webkit-text-fill-color: transparent;
}

@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  .quiz-title { color: var(--q-gold); -webkit-text-fill-color: currentColor; }
}

.quiz-tagline {
  margin: 10px 0 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--q-ink-soft);
}

.quiz-panel {
  background: var(--q-card);
  border: 1px solid var(--q-card-line);
  border-radius: var(--q-radius-lg);
  padding: 20px 18px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.quiz-panel + .quiz-panel { margin-top: 16px; }

/* Big primary action — START, TRY AGAIN, SUBMIT. */
.quiz-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  min-height: 56px;
  padding: 16px 22px;
  border: none;
  border-radius: var(--q-radius);
  font-family: inherit;
  font-size: 1.12rem;
  font-weight: 900;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #182435;
  background: linear-gradient(180deg, #eed3aa 0%, var(--q-accent) 100%);
  box-shadow: 0 5px 0 #8c6946, 0 12px 22px rgba(0, 0, 0, 0.35);
  cursor: pointer;
  transition: transform 0.10s ease, box-shadow 0.10s ease, filter 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;   /* no 300ms double-tap-zoom delay */
}

.quiz-btn:hover { filter: brightness(1.06); }

/* Press the button "into" the page by shrinking its shadow. */
.quiz-btn:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 #8c6946, 0 6px 12px rgba(0, 0, 0, 0.35);
}

.quiz-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: 0 5px 0 #62513e;
}

.quiz-btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--q-card-line);
  color: var(--q-ink);
  box-shadow: none;
  font-size: 0.98rem;
  min-height: var(--q-tap);
  text-transform: none;
  letter-spacing: 0;
}

.quiz-btn-secondary:active { transform: translateY(2px); box-shadow: none; }

.quiz-btn-row {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

/* Focus ring — visible for keyboard users, absent for mouse. */
.quiz-root :focus-visible {
  outline: 3px solid var(--q-sky);
  outline-offset: 3px;
}


/* ------------------------------------------------------------
   SOUND TOGGLE
   ------------------------------------------------------------ */
.sound-toggle {
  width: var(--q-tap);
  height: var(--q-tap);
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  line-height: 1;
  border-radius: 50%;
  border: 1px solid var(--q-card-line);
  background: rgba(255, 255, 255, 0.12);
  color: var(--q-ink);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.sound-toggle:active { transform: scale(0.94); }


/* ============================================================
   SCREEN 1 — WELCOME
   ============================================================ */
.welcome-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.welcome-head-text { min-width: 0; }   /* lets long words wrap instead of pushing the button */

.institution-block {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--q-card-line);
  display: grid;
  gap: 8px;
}

.institution-line {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  font-size: 0.92rem;
  line-height: 1.4;
}

.institution-label {
  color: var(--q-ink-faint);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  font-weight: 700;
  flex: 0 0 100%;
}

.institution-value { font-weight: 700; color: var(--q-ink); }

/* --- the two text fields --- */
.quiz-field { margin-bottom: 16px; }

.quiz-field label {
  display: block;
  margin-bottom: 7px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--q-ink);
}

.quiz-field input {
  width: 100%;
  min-height: 54px;
  padding: 14px 16px;
  font-family: inherit;
  /* 16px minimum, or iOS Safari zooms the page when tapped. */
  font-size: 1rem;
  color: #0b2321;
  background: #ffffff;
  border: 2px solid transparent;
  border-radius: var(--q-radius);
}

.quiz-field input::placeholder { color: #8b93a7; }

.quiz-field input:focus {
  outline: none;
  border-color: var(--q-sky);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.28);
}

.quiz-field input.input-error {
  border-color: #ff8fa3;
  box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.25);
}

.field-error {
  display: none;
  margin-top: 7px;
  font-size: 0.88rem;
  font-weight: 700;
  color: #ffd0d6;
}

.field-error.is-visible { display: block; }

/* The "before you start" note under the form. */
.quiz-note {
  margin-top: 14px;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--q-ink-faint);
}


/* ============================================================
   SCREEN 2 — INSTRUCTIONS
   ============================================================ */
.briefing-who {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  margin-bottom: 4px;
  font-size: 1.05rem;
}

.briefing-who strong { font-weight: 900; }

.briefing-who .briefing-class {
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  font-size: 0.82rem;
  font-weight: 700;
}

.rule-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 16px 0;
}

.rule-tile {
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid var(--q-card-line);
  border-radius: var(--q-radius);
  padding: 14px 12px;
  text-align: center;
}

.rule-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 900;
  line-height: 1.05;
  color: var(--q-gold);
}

.rule-label {
  display: block;
  margin-top: 4px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--q-ink-soft);
}

.brief-list {
  list-style: none;
  display: grid;
  gap: 11px;
  margin: 4px 0 0;
  padding: 0;
}

.brief-list li {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--q-ink-soft);
}

.brief-list .brief-icon {
  flex: 0 0 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  font-size: 0.86rem;
}

.brief-warning {
  margin-top: 16px;
  padding: 13px 15px;
  border-radius: var(--q-radius);
  background: rgba(249, 115, 22, 0.20);
  border: 1px solid rgba(249, 115, 22, 0.45);
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.45;
}


/* ============================================================
   SCREEN 3 — THE GAME
   ============================================================ */
.game-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.game-brand {
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--q-ink-faint);
  margin-right: auto;
  /* Never let the title squeeze the timer off a 360px screen. */
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timer-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 42px;
  padding: 8px 15px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--q-card-line);
  font-variant-numeric: tabular-nums;   /* stops the digits jittering */
  font-weight: 900;
  font-size: 1.12rem;
}

.timer-badge .timer-icon { font-size: 0.95rem; }

/* Under a minute: a slow pulse. Under twenty seconds: faster,
   red, and slightly larger. Noticeable, not alarming. */
.timer-badge.is-warning {
  background: rgba(253, 224, 71, 0.22);
  border-color: rgba(253, 224, 71, 0.60);
  color: var(--q-gold);
  animation: timer-pulse 1.6s ease-in-out infinite;
}

.timer-badge.is-urgent {
  background: rgba(220, 38, 38, 0.28);
  border-color: rgba(255, 120, 120, 0.75);
  color: #ffd9d9;
  animation: timer-pulse 0.7s ease-in-out infinite;
}

@keyframes timer-pulse {
  0%, 100% { transform: scale(1);    opacity: 1; }
  50%      { transform: scale(1.06); opacity: 0.86; }
}

.progress-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.13);
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--q-sky), var(--q-accent));
  transition: width 0.35s cubic-bezier(0.2, 0.8, 0.3, 1);
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--q-ink-faint);
  margin-bottom: 14px;
}

.progress-meta .score-chip { color: var(--q-gold); }

/* --- the question card --- */
.question-card {
  background: var(--q-card);
  border: 1px solid var(--q-card-line);
  border-radius: var(--q-radius-lg);
  padding: 18px 16px;
}

.question-card.is-entering { animation: question-in 0.32s ease-out; }

@keyframes question-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.question-card.is-wrong-shake { animation: card-shake 0.36s ease-in-out; }

@keyframes card-shake {
  0%, 100%   { transform: translateX(0); }
  20%, 60%   { transform: translateX(-7px); }
  40%, 80%   { transform: translateX(7px); }
}

.question-type-badge {
  display: inline-block;
  margin-bottom: 10px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.18);
  border: 1px solid rgba(56, 189, 248, 0.42);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: #bae6fd;
}

.question-text {
  margin: 0 0 15px;
  font-size: 1.16rem;
  line-height: 1.42;
  font-weight: 800;
}

/* --- the optional diagram --- */
.question-image-wrap {
  margin-bottom: 15px;
  border-radius: var(--q-radius);
  overflow: hidden;
  background: #ffffff;
  /* White plate behind the chart: every extracted diagram has a
     white or light background of its own, and this stops a
     transparent PNG turning unreadable on the dark stage. */
  padding: 8px;
}

.question-image-wrap img {
  display: block;
  width: 100%;
  height: auto;              /* keeps the aspect ratio — never squashed */
  max-height: 40vh;
  object-fit: contain;
  margin: 0 auto;
}

/* If the file cannot be fetched, say so instead of showing a
   broken-image icon. */
.question-image-wrap.is-failed {
  padding: 16px;
  background: rgba(255, 255, 255, 0.08);
}

.question-image-wrap.is-failed img { display: none; }

.question-image-wrap.is-failed::after {
  content: "The image could not be loaded — answer from the question above.";
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--q-ink-soft);
  text-align: center;
}

/* --- answer cards --- */
.answer-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.answer-card {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 60px;
  padding: 13px 15px;
  text-align: left;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--q-ink);
  background: rgba(255, 255, 255, 0.10);
  border: 2px solid var(--q-card-line);
  border-radius: var(--q-radius);
  cursor: pointer;
  transition: transform 0.10s ease, background 0.15s ease, border-color 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.answer-card:hover { background: rgba(255, 255, 255, 0.16); }
.answer-card:active { transform: scale(0.985); }

/* The four slots get their own colour AND their own shape, so
   they are never distinguished by colour alone. */
.answer-slot-0 { border-color: rgba(249, 115, 22, 0.55); }
.answer-slot-1 { border-color: rgba(56, 189, 248, 0.55); }
.answer-slot-2 { border-color: rgba(253, 224, 71, 0.55); }
.answer-slot-3 { border-color: rgba(34, 197, 94, 0.55); }

.answer-badge {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  min-width: 42px;
  height: 34px;
  padding: 0 8px;
  border-radius: 9px;
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  background: rgba(0, 0, 0, 0.28);
}

.answer-slot-0 .answer-badge { color: #fdba74; }
.answer-slot-1 .answer-badge { color: #7dd3fc; }
.answer-slot-2 .answer-badge { color: #fde68a; }
.answer-slot-3 .answer-badge { color: #86efac; }

.answer-text { flex: 1 1 auto; min-width: 0; }

/* True / False: two tall buttons side by side. */
.answer-list-duo { grid-template-columns: 1fr 1fr; }

.answer-list-duo .answer-card {
  flex-direction: column;
  gap: 8px;
  min-height: 108px;
  justify-content: center;
  text-align: center;
  font-size: 1.1rem;
}

.answer-list-duo .answer-badge {
  min-width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.25rem;
}

/* --- multiple-select --- */
.answer-tick {
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  border: 2px solid var(--q-card-line);
  font-size: 0.85rem;
  font-weight: 900;
  color: transparent;
}

.answer-card.is-selected {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--q-sky);
}

.answer-card.is-selected .answer-tick {
  background: var(--q-sky);
  border-color: var(--q-sky);
  color: #053b34;
}

.multi-submit-wrap { margin-top: 14px; }

.multi-hint {
  margin: 0 0 9px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--q-ink-faint);
  text-align: center;
}

/* --- the correct / wrong flash --- */
.feedback-flash {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  pointer-events: none;   /* taps pass straight through */
  animation: flash-in 0.20s ease-out;
}

.feedback-flash[hidden] { display: none; }

.feedback-flash.is-correct { background: rgba(22, 163, 74, 0.90); }
.feedback-flash.is-wrong   { background: rgba(220, 38, 38, 0.90); }

.feedback-icon {
  display: grid;
  place-items: center;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.94);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
}

.feedback-flash.is-correct .feedback-icon { color: var(--q-green); animation: pop-in 0.34s cubic-bezier(0.2, 1.4, 0.4, 1); }
.feedback-flash.is-wrong   .feedback-icon { color: var(--q-red);   animation: shake-in 0.36s ease-in-out; }

.feedback-word {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #ffffff;
}

@keyframes flash-in { from { opacity: 0; } to { opacity: 1; } }

@keyframes pop-in {
  0%   { transform: scale(0.3); }
  70%  { transform: scale(1.12); }
  100% { transform: scale(1); }
}

@keyframes shake-in {
  0%   { transform: scale(0.6) rotate(0deg); }
  40%  { transform: scale(1.05) rotate(-9deg); }
  70%  { transform: scale(1) rotate(9deg); }
  100% { transform: scale(1) rotate(0deg); }
}


/* ============================================================
   SCREENS 4 & 5 — RESULTS
   ============================================================ */
.result-screen { text-align: center; padding-top: 8px; }

.result-headline {
  font-size: clamp(1.9rem, 8.5vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin: 0 0 6px;
  line-height: 1.05;
}

.result-screen .result-headline { color: var(--q-gold); }
.perfect-screen .result-headline {
  background: linear-gradient(100deg, var(--q-gold), #fff 50%, var(--q-gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: shine 2.6s linear infinite;
  background-size: 200% auto;
}

@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  .perfect-screen .result-headline { color: var(--q-gold); -webkit-text-fill-color: currentColor; }
}

@keyframes shine {
  to { background-position: 200% center; }
}

.result-student {
  margin: 0 0 2px;
  font-size: 1.3rem;
  font-weight: 900;
  /* A long name must wrap, not overflow the card. */
  overflow-wrap: anywhere;
}

.result-class {
  display: inline-block;
  margin-bottom: 16px;
  padding: 4px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  font-size: 0.85rem;
  font-weight: 700;
}

.score-dial {
  display: grid;
  place-items: center;
  gap: 2px;
  margin: 0 auto 16px;
  width: 176px;
  height: 176px;
  border-radius: 50%;
  border: 5px solid rgba(255, 255, 255, 0.22);
  background: rgba(0, 0, 0, 0.22);
}

.perfect-screen .score-dial {
  border-color: var(--q-gold);
  box-shadow: 0 0 34px rgba(253, 224, 71, 0.55);
}

.score-dial .score-main {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.score-dial .score-pct {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--q-gold);
}

.score-dial .score-attempt {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--q-ink-faint);
}

.trophy {
  font-size: 4.6rem;
  line-height: 1;
  margin-bottom: 6px;
  animation: trophy-in 0.75s cubic-bezier(0.2, 1.5, 0.4, 1);
}

@keyframes trophy-in {
  0%   { transform: scale(0) rotate(-30deg); opacity: 0; }
  60%  { transform: scale(1.2) rotate(8deg); opacity: 1; }
  100% { transform: scale(1) rotate(0deg); }
}

.perfect-time {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 10px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.13);
  border: 1px solid var(--q-card-line);
  font-size: 1.1rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.perfect-time .perfect-time-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--q-ink-faint);
}

.result-message {
  margin: 0 auto 6px;
  max-width: 34ch;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--q-ink-soft);
}

.result-rule {
  margin: 0 auto 18px;
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--q-gold);
}

/* ------------------------------------------------------------
   THE ATTEMPT HISTORY
   ------------------------------------------------------------
   Every attempt of this session, on both result screens. Left-
   aligned inside a centred screen, because a list of numbers is
   far easier to compare down a column than centred.

   Scores only. It deliberately says nothing about which
   questions were missed.
   ------------------------------------------------------------ */
.attempt-history {
  margin: 0 auto 18px;
  padding: 14px 14px 12px;
  max-width: 420px;
  text-align: left;
  background: rgba(0, 0, 0, 0.20);
  border: 1px solid var(--q-card-line);
  border-radius: var(--q-radius);
}

.attempt-history-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.attempt-history-title {
  margin: 0;
  margin-right: auto;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--q-ink-faint);
}

.attempt-refresh {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid var(--q-card-line);
  background: rgba(255, 255, 255, 0.10);
  color: var(--q-ink-soft);
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.attempt-refresh:active { transform: scale(0.92); }

.attempt-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

/* Four columns: who, score, percent, mark. The score and percent
   columns are fixed so the digits line up down the list even when
   the numbers differ in width. */
.attempt-row {
  display: grid;
  /* The last column holds an emoji, which renders wider than its
     nominal size — 1.5em rather than 1.3em, or the trophy gets
     its edge clipped. */
  grid-template-columns: 1fr auto 3.4em 1.5em;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.88rem;
  font-variant-numeric: tabular-nums;
}

.attempt-who {
  min-width: 0;      /* lets the ellipsis below actually work */
  display: grid;
  gap: 1px;
}

.attempt-name {
  font-weight: 700;
  color: var(--q-ink);
  /* One line per student keeps the list scannable. A very long
     name is clipped here rather than pushing the score column
     off the row — the leaderboard is where names are shown in
     full. */
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.attempt-class {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--q-ink-faint);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.attempt-score { font-weight: 900; }

.attempt-pct {
  text-align: right;
  font-weight: 700;
  color: var(--q-ink-faint);
}

.attempt-mark {
  text-align: center;
  font-size: 0.9rem;
  line-height: 1;
}

/* A passing attempt is marked by a trophy AND a green tint, so
   it is never colour alone that carries the meaning. */
.attempt-row.is-pass {
  background: rgba(34, 197, 94, 0.18);
  border: 1px solid rgba(34, 197, 94, 0.42);
}

.attempt-row.is-pass .attempt-score { color: #86efac; }

/* The student's own rows, so they can find themselves in the
   list. Marked by an outline AND the word "YOU" in the class
   line, never by colour alone. */
.attempt-row.is-you {
  outline: 2px solid var(--q-gold);
  outline-offset: -2px;
}

.attempt-row.is-you .attempt-class { color: var(--q-gold); }

.attempt-summary {
  margin: 10px 0 0;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--q-ink-faint);
  min-height: 1.2em;   /* stops the panel jumping while it loads */
}

.attempt-summary.is-pending { color: var(--q-ink-faint); }
.attempt-summary.is-ok      { color: var(--q-ink-soft); }
.attempt-summary.is-empty   { color: var(--q-gold); }
.attempt-summary.is-error   { color: #ffb4b4; }

/* The scoreboard can grow to 15 rows, which is taller than a
   phone. Cap it and let it scroll inside its own box so the
   TRY AGAIN button stays reachable without a long scroll. */
.attempt-list {
  max-height: 46vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* Very narrow phones: shrink the percent column rather than let
   the row wrap into a tangle. */
@media (max-width: 335px) {
  .attempt-row {
    /* The smaller font shrinks the em, so the emoji column needs
       proportionally more of it. */
    grid-template-columns: 1fr auto 3em 1.7em;
    font-size: 0.84rem;
  }
}


/* The honest little line about whether the row reached the
   database. */
.save-status {
  margin-top: 14px;
  font-size: 0.85rem;
  font-weight: 700;
  min-height: 1.3em;
}

.save-status.is-pending { color: var(--q-ink-faint); }
.save-status.is-ok      { color: #86efac; }
.save-status.is-error   { color: #ffb4b4; }

.save-retry {
  margin-left: 6px;
  padding: 7px 14px;
  min-height: 38px;
  border-radius: 9px;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  cursor: pointer;
  touch-action: manipulation;
}

/* The canvas the confetti is drawn on. */
.celebration-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 40;
}


/* ============================================================
   SCREEN 6 — LEADERBOARD
   ============================================================ */
.board-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.board-head h2 {
  margin: 0;
  margin-right: auto;
  font-size: 1.35rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.board-subtitle {
  margin: 0 0 4px;
  font-size: 0.88rem;
  color: var(--q-ink-faint);
  font-weight: 700;
}

.board-status {
  margin: 10px 0 14px;
  font-size: 0.86rem;
  font-weight: 700;
  min-height: 1.2em;
}

.board-status.is-pending { color: var(--q-ink-faint); }
.board-status.is-ok      { color: var(--q-ink-soft); }
.board-status.is-empty   { color: var(--q-gold); }
.board-status.is-error   { color: #ffb4b4; }

.board-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.board-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--q-radius);
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid var(--q-card-line);
}

.board-row-top {
  background: rgba(253, 224, 71, 0.15);
  border-color: rgba(253, 224, 71, 0.42);
}

.board-rank {
  flex: 0 0 40px;
  font-size: 1.3rem;
  font-weight: 900;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.board-who {
  flex: 1 1 auto;
  min-width: 0;      /* required for the ellipsis below to work */
  display: grid;
  gap: 1px;
}

/* Full names are shown in full — a long name wraps onto a second
   line rather than being cut off with an ellipsis. Being named on
   this board is the reward, so the name must never be clipped. */
.board-name {
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.board-class {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--q-ink-faint);
}

.board-time {
  flex: 0 0 auto;
  font-size: 1.12rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--q-gold);
}


/* ============================================================
   THE INTRO BLOCK ABOVE THE GAME
   ============================================================
   Plain site styling, so the page still reads as part of the
   site before the student starts playing.
   ============================================================ */
.quiz-intro-block { margin-bottom: 0; }


/* ============================================================
   BIGGER SCREENS
   ============================================================
   The phone layout is the baseline; these only add what extra
   width genuinely improves.
   ============================================================ */
@media (min-width: 620px) {
  .quiz-root { padding: 34px 28px 40px; }

  .rule-grid { grid-template-columns: repeat(4, 1fr); }

  /* Four answers in two columns, once there is room for the
     text not to wrap awkwardly. */
  .answer-list { grid-template-columns: 1fr 1fr; }
  .answer-list-duo { grid-template-columns: 1fr 1fr; }

  .quiz-btn-row { grid-template-columns: repeat(2, 1fr); }
  .quiz-btn-row .quiz-btn-wide { grid-column: 1 / -1; }

  .question-text { font-size: 1.3rem; }
  .score-dial { width: 200px; height: 200px; }
  .score-dial .score-main { font-size: 2.9rem; }
}

@media (min-width: 900px) {
  .quiz-screen { max-width: 820px; }
  .question-image-wrap img { max-height: 46vh; }
}

/* A short landscape phone: shrink the tall bits so a question
   and its answers still fit without scrolling. */
@media (max-height: 520px) and (orientation: landscape) {
  .answer-list-duo .answer-card { min-height: 74px; }
  .question-image-wrap img { max-height: 30vh; }
  .trophy { font-size: 3rem; }
  .score-dial { width: 132px; height: 132px; }
  .score-dial .score-main { font-size: 1.9rem; }
}


/* ============================================================
   REDUCED MOTION
   ============================================================
   Someone who has asked their device to calm animations down
   still gets every colour, every state and every message — the
   movement is what goes, not the information. The confetti is
   skipped in JavaScript for the same reason.
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .quiz-root *,
  .quiz-root *::before,
  .quiz-root *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .question-card.is-entering,
  .question-card.is-wrong-shake,
  .timer-badge.is-warning,
  .timer-badge.is-urgent {
    animation: none !important;
  }

  /* The urgent timer still has to stand out without pulsing. */
  .timer-badge.is-urgent { border-width: 2px; }
}

/* Aircraft production finish: subdued answer outlines reserve green and
   red for correctness feedback, while the diagrams remain legible. */
.answer-slot-0, .answer-slot-1,
.answer-slot-2, .answer-slot-3 { border-color: rgba(165, 193, 208, 0.48); }
.answer-slot-0 .answer-badge, .answer-slot-1 .answer-badge,
.answer-slot-2 .answer-badge, .answer-slot-3 .answer-badge { color: #d5e7ee; }
.question-type-badge {
  background: rgba(142, 197, 216, 0.13);
  border-color: rgba(142, 197, 216, 0.38);
  color: #d5e7ee;
}
.perfect-screen .score-dial { box-shadow: 0 0 28px rgba(228, 195, 143, 0.25); }
.question-image-wrap img { cursor: zoom-in; }

.workflow-zoom-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin: -2px 0 16px;
  padding: 8px 14px;
  border: 1px solid rgba(142, 197, 216, 0.65);
  border-radius: 10px;
  background: rgba(142, 197, 216, 0.13);
  color: #e2f1f6;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.workflow-zoom-button[hidden] { display: none; }
.workflow-zoom-button:focus-visible,
.workflow-zoom-toolbar button:focus-visible {
  outline: 3px solid #8ec5d8;
  outline-offset: 3px;
}

.workflow-zoom-dialog {
  width: min(96vw, 1500px);
  max-width: min(96vw, 1500px);
  max-height: 94dvh;
  padding: 0;
  border: 1px solid #7892a2;
  border-radius: 14px;
  color: #e8f0f4;
  background: #142436;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.55);
}
.workflow-zoom-dialog::backdrop { background: rgba(3, 10, 20, 0.82); }
.workflow-zoom-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  font-size: 0.9rem;
}
.workflow-zoom-toolbar button {
  min-height: 44px;
  padding: 7px 14px;
  border: 1px solid #90adbc;
  border-radius: 8px;
  background: #2a465d;
  color: white;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.workflow-zoom-hint {
  margin: 0;
  padding: 0 14px 10px;
  color: #b9d0dc;
  font-size: 0.8rem;
}
.workflow-zoom-viewport {
  max-height: calc(94dvh - 94px);
  overflow: auto;
  background: #faf9f5;
  -webkit-overflow-scrolling: touch;
}
.workflow-zoom-viewport img {
  display: block;
  /* Activity 8 has two diagrams of different widths (the skill ladder
     is 1713px, the CTRM flow chart 1327px). A fixed width would
     upscale one and shrink the other, so each is shown at its own
     natural size and the viewport scrolls. */
  width: auto;
  max-width: none;
  height: auto;
}