/* ── Quiz Modal Backdrop ── */
.quiz-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 25, 50, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: stretch;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--ease-soft);
  z-index: 100;
}
@media (max-width: 600px) {
  /* drop expensive backdrop blur on mobile */
  .quiz-modal { background: rgba(15, 25, 50, 0.78); backdrop-filter: none; -webkit-backdrop-filter: none; }
}
.quiz-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.quiz-modal__panel {
  position: relative;
  width: 100%;
  max-width: 480px;
  background: var(--bg-elevated);
  display: flex;
  flex-direction: column;
  transform: scale(0.92) translateY(20px);
  opacity: 0;
  transition: transform 400ms var(--ease-spring), opacity 280ms var(--ease-soft);
  overflow: hidden;
}
.quiz-modal.is-open .quiz-modal__panel {
  transform: scale(1) translateY(0);
  opacity: 1;
}
@media (min-width: 481px) {
  .quiz-modal__panel { border-radius: var(--radius-lg); margin: var(--space-6) 0; max-height: calc(100vh - 48px); }
}

/* ── Top bar ── */
.quiz-topbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--divider);
  flex-shrink: 0;
}
.quiz-progress {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.quiz-progress__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--divider);
  transition: background-color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-spring);
  flex-shrink: 0;
}
.quiz-progress__dot.is-active {
  background: var(--blue-primary);
  transform: scale(1.25);
}
.quiz-progress__dot.is-done {
  background: var(--blue-primary);
}
.quiz-progress__line {
  flex: 1;
  height: 2px;
  background: var(--divider);
  position: relative;
  overflow: hidden;
}
.quiz-progress__line-fill {
  position: absolute;
  inset: 0;
  background: var(--blue-primary);
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 400ms var(--ease-out);
}
.quiz-progress__line.is-done .quiz-progress__line-fill {
  transform: scaleX(1);
}
.quiz-close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text-secondary);
  border-radius: 50%;
  transition: background-color var(--dur-fast) var(--ease-soft);
  flex-shrink: 0;
}
.quiz-close:hover { background: var(--bg); }
.quiz-close:active { transform: scale(0.92); }

/* ── Content ── */
.quiz-content {
  flex: 1;
  padding: var(--space-6) var(--space-5) var(--space-7);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.quiz-step {
  animation: fadeIn 320ms var(--ease-out);
}
.quiz-step.is-leaving {
  animation: slideOutLeft 280ms var(--ease-soft) forwards;
}
.quiz-step.is-entering {
  animation: slideInRight 320ms var(--ease-out);
}

.quiz-label {
  font-size: var(--text-caption);
  color: var(--text-tertiary);
  font-weight: 600;
  letter-spacing: var(--ls-default);
}
.quiz-question {
  margin-top: var(--space-3);
  font-size: var(--text-h2);
  font-weight: 700;
  letter-spacing: var(--ls-tight);
  line-height: 1.35;
}
.quiz-question__hl { color: var(--error); font-weight: 700; }

/* ── Image carousel ── */
.quiz-images {
  margin-top: var(--space-5);
}
.quiz-images__track {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-2);
  scrollbar-width: none;
}
.quiz-images__track::-webkit-scrollbar { display: none; }
.quiz-image {
  flex: 0 0 80%;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg);
  scroll-snap-align: center;
  cursor: pointer;
  transition: transform var(--dur-base) var(--ease-out);
}
.quiz-image:active { transform: scale(0.98); }
.quiz-image img { width: 100%; height: 100%; object-fit: cover; display: block; }
.quiz-image--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: var(--text-caption);
  background: linear-gradient(135deg, #f4f6fb 0%, #ecf1fa 100%);
}
.quiz-images__dots {
  margin-top: var(--space-2);
  display: flex;
  gap: 6px;
  justify-content: center;
}
.quiz-images__dots span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--divider);
  transition: background-color var(--dur-fast) var(--ease-soft);
}
.quiz-images__dots span.is-active { background: var(--blue-primary); }

/* ── Throw-in stage (Q2/Q3 처음 진입 시) — populated in Task 10 ── */
.quiz-throw-stage {
  position: absolute;
  inset: 0;
  background: rgba(15, 25, 50, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  pointer-events: auto;
}
.quiz-throw-stage.is-fading-out {
  animation: fadeIn 600ms var(--ease-soft) reverse forwards;
}
.quiz-throw-img {
  position: absolute;
  width: 70%;
  max-width: 320px;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  opacity: 0;
  animation-fill-mode: both;
  animation-duration: 1100ms;
  animation-timing-function: var(--ease-throw);
  will-change: transform, opacity;
}
.quiz-throw-img img { width: 100%; height: 100%; object-fit: cover; }
.quiz-throw-img--1 { animation-name: throwIn1; animation-delay: 0ms;    z-index: 1; }
.quiz-throw-img--2 { animation-name: throwIn2; animation-delay: 2600ms; z-index: 2; }
.quiz-throw-img--3 { animation-name: throwIn3; animation-delay: 5200ms; z-index: 3; }
.quiz-throw-img--placeholder {
  background: linear-gradient(135deg, #f4f6fb 0%, #ecf1fa 100%);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-tertiary);
}
.quiz-modal__panel.is-shaking { animation: containerShake 200ms var(--ease-soft); }

/* ── Options ── */
.quiz-options {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.quiz-option {
  width: 100%;
  padding: 18px 20px;
  background: var(--bg-elevated);
  border: 1.5px solid var(--divider);
  border-radius: var(--radius-md);
  font-size: var(--text-h3);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: var(--ls-tight);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  transition: all var(--dur-fast) var(--ease-soft);
}
.quiz-option:hover { border-color: var(--blue-primary); }
.quiz-option:active { transform: scale(0.98); }
.quiz-option.is-correct {
  background: var(--success-soft);
  border-color: var(--success);
  color: var(--success);
  animation: spring 400ms var(--ease-spring);
}
.quiz-option.is-wrong {
  background: var(--error-soft);
  border-color: var(--error);
  color: var(--error);
  animation: shake 320ms var(--ease-soft);
}
.quiz-option__icon { font-size: 1.2em; display: inline-flex; }

/* ── Reveal screen ── */
.quiz-reveal { text-align: center; padding: var(--space-7) var(--space-2); }
.quiz-reveal__check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px; height: 80px;
  border-radius: 50%;
  background: var(--blue-soft);
  color: var(--blue-primary);
  font-size: 44px;
  animation: spring 600ms var(--ease-spring);
}
.quiz-reveal__title {
  margin-top: var(--space-5);
  font-size: var(--text-h2);
  font-weight: 700;
  letter-spacing: var(--ls-tight);
  opacity: 0;
  animation: fadeUp 400ms var(--ease-out) 300ms forwards;
}
.quiz-reveal__hashtag {
  margin-top: var(--space-5);
  padding: var(--space-5) var(--space-4);
  background: var(--blue-soft);
  border-radius: var(--radius-md);
  font-size: var(--text-h3);
  font-weight: 700;
  color: var(--blue-deep);
  letter-spacing: var(--ls-tight);
  word-break: keep-all;
  line-height: 1.4;
  opacity: 0;
  animation: fadeUp 400ms var(--ease-out) 450ms forwards, glowPulse 1200ms var(--ease-soft) 800ms;
}
.quiz-reveal__buttons {
  margin-top: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.quiz-reveal__buttons .cta {
  width: 100%;
  margin-top: 0;
  opacity: 0;
  animation: fadeUp 400ms var(--ease-out) forwards;
}
.quiz-reveal__buttons .cta:nth-child(1) { animation-delay: 600ms; }
.quiz-reveal__buttons .cta:nth-child(2) { animation-delay: 700ms; }
.quiz-reveal__buttons .cta:nth-child(3) { animation-delay: 800ms; }
.quiz-reveal__hints {
  margin-top: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.quiz-reveal__hints .caption {
  justify-content: center;
  text-align: left;
  opacity: 0;
  animation: fadeUp 400ms var(--ease-out) forwards;
}
.quiz-reveal__hints .caption:nth-child(1) { animation-delay: 1000ms; }
.quiz-reveal__hints .caption:nth-child(2) { animation-delay: 1150ms; }

/* ── Reveal secondary actions (퀴즈 다시 풀기 / 복귀총공계) ── */
.quiz-reveal__secondary {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  opacity: 0;
  animation: fadeUp 400ms var(--ease-out) 950ms forwards;
}
.cta--ghost {
  background: var(--bg);
  color: var(--text-secondary);
  border: 1px solid var(--divider);
  padding: 12px 14px;
  font-size: var(--text-caption);
  font-weight: 600;
  gap: 6px;
  width: 100%;
  margin-top: 0;
  text-decoration: none;
  min-height: 56px;
  line-height: 1.3;
  text-align: center;
  word-break: keep-all;
}
.cta--ghost:hover { background: #EFF1F5; color: var(--text-primary); transform: translateY(-1px); }
.cta--ghost:active { transform: scale(0.97); }
.cta--ghost i { flex-shrink: 0; font-size: 1em; }
.cta--ghost span { white-space: normal; }

/* ── Lightbox (populated in Task 10) ── */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms var(--ease-out);
}
.lightbox.is-open { opacity: 1; pointer-events: auto; }
.lightbox__img {
  max-width: 92%;
  max-height: 88%;
  object-fit: contain;
  border-radius: var(--radius-md);
  transform: scale(0.95);
  transition: transform 240ms var(--ease-out);
}
.lightbox.is-open .lightbox__img { transform: scale(1); }
.lightbox__close, .lightbox__nav {
  position: absolute;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  color: white;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  transition: background-color var(--dur-fast) var(--ease-soft);
}
.lightbox__close { top: calc(var(--space-5) + env(safe-area-inset-top)); right: var(--space-5); }
.lightbox__nav--prev { left: var(--space-3); top: 50%; transform: translateY(-50%); }
.lightbox__nav--next { right: var(--space-3); top: 50%; transform: translateY(-50%); }
.lightbox__close:hover, .lightbox__nav:hover { background: rgba(255,255,255,0.22); }

/* ── Evidence link (Q2 etc.) ── */
.quiz-evidence {
  margin-top: var(--space-3);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 8px 14px;
  background: var(--blue-soft);
  color: var(--blue-deep);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: var(--ls-default);
  border-radius: var(--radius-pill);
  transition: transform var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-soft);
  text-decoration: none;
}
.quiz-evidence:hover {
  background: #DCEBFF;
  transform: translateY(-1px);
}
.quiz-evidence:active { transform: scale(0.97); }
.quiz-evidence span { font-size: 0.9em; opacity: 0.8; }