/* =============================================
   21st Memory — Interactive Quiz
   Professional archive aesthetic (matches main.css)
   ============================================= */

.quiz-page {
  min-height: 60vh;
  padding-bottom: 2rem;
}

.quiz-shell {
  max-width: 46rem;
  margin: 0 auto;
}

/* ── Card (aligned with content-card / surface-tier-elevated) ── */

.quiz-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 1.25rem;
  padding: 1.65rem 1.35rem 1.5rem;
  box-shadow: var(--surface-tier-elevated);
  overflow: hidden;
  outline: none;
}

.quiz-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    var(--gloss-surface),
    radial-gradient(circle at 14% 10%, var(--glow-subtle) 0%, transparent 52%),
    radial-gradient(circle at 88% 92%, var(--light-scrim) 0%, transparent 58%);
  border-radius: inherit;
  pointer-events: none;
  z-index: 0;
}

.quiz-card > * {
  position: relative;
  z-index: 1;
}

@media (min-width: 640px) {
  .quiz-card {
    padding: 2.15rem 2.35rem 1.85rem;
    border-radius: 1.35rem;
  }
}

/* ── Start / intro ── */

.quiz-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.38rem 0.95rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  margin-bottom: 1.1rem;
}

.quiz-title {
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
  font-size: clamp(1.75rem, 4vw, 2.45rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.12;
  color: var(--text-primary);
  margin: 0 0 0.9rem;
}

.quiz-intro {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.7;
  max-width: 44ch;
  margin: 0 0 1.4rem;
}

.quiz-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1.65rem;
}

.quiz-meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.42rem 0.9rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-soft);
  background: rgba(91, 33, 182, 0.16);
  border: 1px solid rgba(124, 58, 237, 0.28);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.quiz-mode-label {
  margin: 0 0 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.quiz-mode-toggle {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 1.85rem;
}

@media (min-width: 540px) {
  .quiz-mode-toggle {
    grid-template-columns: 1fr 1fr;
  }
}

.quiz-mode-btn {
  text-align: left;
  padding: 1.05rem 1.15rem;
  border-radius: 1rem;
  border: 1.5px solid rgba(124, 58, 237, 0.28);
  background:
    linear-gradient(165deg, rgba(42, 31, 64, 0.45) 0%, rgba(18, 10, 46, 0.55) 100%);
  color: var(--text-prose);
  cursor: pointer;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 6px 16px -10px rgba(0, 0, 0, 0.45);
  transition: border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
}

.quiz-mode-btn:hover {
  border-color: rgba(124, 58, 237, 0.55);
  background: linear-gradient(165deg, rgba(59, 7, 100, 0.35) 0%, rgba(42, 31, 64, 0.55) 100%);
  transform: translateY(-1px);
}

.quiz-mode-btn.is-active {
  border-color: rgba(167, 139, 250, 0.55);
  background: linear-gradient(165deg, rgba(76, 29, 149, 0.48) 0%, rgba(30, 17, 53, 0.72) 100%);
  box-shadow:
    0 0 0 1px rgba(124, 58, 237, 0.18),
    0 12px 28px -14px rgba(91, 33, 182, 0.5),
    inset 0 1.5px 0 rgba(255, 255, 255, 0.12);
}

.quiz-mode-btn__label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.quiz-mode-btn__desc {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Actions / footer nav ──
   Reinforce global buttons so <button> and <a> match exactly on quiz pages. */

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
}

.quiz-actions--end {
  justify-content: space-between;
  margin-top: 1.65rem;
  padding-top: 1.35rem;
  border-top: 1px solid rgba(124, 58, 237, 0.16);
  gap: 1rem;
}

/* Quiz CTAs: guaranteed equal geometry + hierarchy */
.quiz-page .btn-primary,
.quiz-page .btn-secondary,
.quiz-actions .btn-primary,
.quiz-actions .btn-secondary {
  min-height: 3.1rem;
  padding: 0.9rem 1.85rem;
  border-radius: 14px;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
}

.quiz-page button.btn-primary,
.quiz-actions button.btn-primary {
  background: linear-gradient(165deg, #5B21B6 0%, #4C1D95 48%, #3B0764 100%);
  color: #fff !important;
  border: 1px solid rgba(196, 181, 253, 0.4);
}

.quiz-page button.btn-primary:hover,
.quiz-actions button.btn-primary:hover {
  background: linear-gradient(165deg, #6D28D9 0%, #5B21B6 48%, #4C1D95 100%);
  color: #fff !important;
}

.quiz-page a.btn-secondary,
.quiz-actions a.btn-secondary,
.quiz-page button.btn-secondary,
.quiz-actions button.btn-secondary {
  background: linear-gradient(165deg, rgba(42, 31, 64, 0.8) 0%, rgba(26, 20, 51, 0.6) 100%);
  color: var(--text-soft) !important;
  border: 1.5px solid rgba(124, 58, 237, 0.55);
}

.quiz-page .btn-primary span,
.quiz-page .btn-secondary span,
.quiz-actions .btn-primary span,
.quiz-actions .btn-secondary span {
  color: inherit !important;
  opacity: 1;
  transform: none;
}

.quiz-page .btn-primary:hover span,
.quiz-actions .btn-primary:hover span {
  transform: none; /* keep label steady; whole button lifts */
}

.quiz-actions .btn-primary:disabled,
.quiz-actions .btn-secondary:disabled,
.quiz-actions--end .btn-primary:disabled,
.quiz-actions--end .btn-secondary:disabled {
  opacity: 0.42;
  cursor: not-allowed;
  transform: none !important;
  pointer-events: none;
  box-shadow: none;
}

.quiz-nav-left {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

/* ── Progress ── */

.quiz-progress-wrap {
  margin-bottom: 1.65rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(124, 58, 237, 0.14);
}

.quiz-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.65rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.quiz-progress-header strong {
  color: var(--text-soft);
  font-weight: 600;
}

.quiz-progress-pct {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  font-size: 0.78rem;
  font-weight: 600;
}

.quiz-progress-track {
  height: 0.4rem;
  border-radius: 999px;
  background: rgba(12, 8, 28, 0.9);
  border: 1px solid rgba(124, 58, 237, 0.18);
  overflow: hidden;
  box-shadow: var(--surface-tier-recessed);
}

.quiz-progress-fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, #4C1D95 0%, #7C3AED 50%, #A78BFA 100%);
  box-shadow: 0 0 14px rgba(124, 58, 237, 0.4);
  transition: width 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}

/* ── Question ── */

.quiz-question-num {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
}

.quiz-question-num::before {
  content: '';
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #7C3AED, #A78BFA);
  box-shadow: 0 0 10px rgba(124, 58, 237, 0.55);
}

.quiz-question-text {
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
  font-size: clamp(1.12rem, 2.4vw, 1.38rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.4;
  color: var(--text-primary);
  margin: 0 0 1.45rem;
}

/* ── Options ── */

.quiz-options {
  display: grid;
  gap: 0.65rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.quiz-option {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.9rem;
  align-items: center;
  width: 100%;
  text-align: left;
  padding: 0.95rem 1.05rem;
  border-radius: 0.95rem;
  border: 1.5px solid rgba(124, 58, 237, 0.26);
  background:
    linear-gradient(165deg, rgba(42, 31, 64, 0.38) 0%, rgba(18, 10, 46, 0.5) 100%);
  color: var(--text-prose);
  cursor: pointer;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 6px 14px -10px rgba(0, 0, 0, 0.4);
  transition:
    border-color 0.22s ease,
    background 0.22s ease,
    box-shadow 0.22s ease,
    transform 0.18s ease,
    opacity 0.22s ease;
}

.quiz-option:hover:not(:disabled) {
  border-color: rgba(167, 139, 250, 0.48);
  background: linear-gradient(165deg, rgba(59, 7, 100, 0.32) 0%, rgba(42, 31, 64, 0.55) 100%);
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 10px 22px -12px rgba(0, 0, 0, 0.5),
    0 0 20px -12px rgba(91, 33, 182, 0.35);
}

.quiz-option:focus-visible {
  outline: 2px solid rgba(167, 139, 250, 0.75);
  outline-offset: 2px;
}

.quiz-option:disabled {
  cursor: default;
}

.quiz-option.is-selected:not(.is-correct):not(.is-incorrect) {
  border-color: rgba(167, 139, 250, 0.6);
  background: linear-gradient(165deg, rgba(76, 29, 149, 0.42) 0%, rgba(30, 17, 53, 0.68) 100%);
  box-shadow:
    0 0 0 1px rgba(124, 58, 237, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 10px 24px -12px rgba(91, 33, 182, 0.4);
}

/* Correct — soft emerald, archive-safe (not neon) */
.quiz-option.is-correct {
  border-color: rgba(52, 211, 153, 0.5);
  background: linear-gradient(165deg, rgba(6, 78, 59, 0.38) 0%, rgba(18, 10, 46, 0.72) 100%);
  box-shadow:
    0 0 0 1px rgba(52, 211, 153, 0.14),
    inset 0 1px 0 rgba(167, 243, 208, 0.08),
    0 10px 26px -14px rgba(16, 185, 129, 0.35);
  opacity: 1;
}

/* Incorrect selection — muted rose, not loud red */
.quiz-option.is-incorrect {
  border-color: rgba(248, 113, 113, 0.42);
  background: linear-gradient(165deg, rgba(90, 30, 40, 0.32) 0%, rgba(18, 10, 46, 0.72) 100%);
  box-shadow:
    0 0 0 1px rgba(248, 113, 113, 0.1),
    inset 0 1px 0 rgba(254, 202, 202, 0.05);
  opacity: 1;
}

/* Unchosen after reveal — quiet, not washed-out grey */
.quiz-option.is-dimmed {
  opacity: 0.48;
  border-color: rgba(124, 58, 237, 0.14);
  background: rgba(18, 10, 46, 0.35);
  box-shadow: none;
}

.quiz-option__label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 0.6rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-soft);
  background: rgba(91, 33, 182, 0.32);
  border: 1px solid rgba(167, 139, 250, 0.22);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
}

.quiz-option.is-selected:not(.is-correct):not(.is-incorrect) .quiz-option__label {
  background: rgba(124, 58, 237, 0.45);
  border-color: rgba(196, 181, 253, 0.4);
  color: #fff;
}

.quiz-option.is-correct .quiz-option__label {
  color: #a7f3d0;
  background: rgba(16, 185, 129, 0.22);
  border-color: rgba(52, 211, 153, 0.38);
}

.quiz-option.is-incorrect .quiz-option__label {
  color: #fecaca;
  background: rgba(239, 68, 68, 0.16);
  border-color: rgba(248, 113, 113, 0.32);
}

.quiz-option__text {
  font-size: 0.94rem;
  line-height: 1.55;
  color: inherit;
}

.quiz-option__status {
  display: none;
  width: 1.35rem;
  height: 1.35rem;
  flex-shrink: 0;
  color: currentColor;
}

.quiz-option__status svg {
  width: 100%;
  height: 100%;
  display: block;
}

.quiz-option.is-correct .quiz-option__status,
.quiz-option.is-incorrect .quiz-option__status {
  display: block;
}

.quiz-option.is-correct .quiz-option__status {
  color: #6ee7b7;
}

.quiz-option.is-incorrect .quiz-option__status {
  color: #fca5a5;
}

/* ── Feedback panel ── */

.quiz-feedback {
  margin-top: 1.25rem;
  padding: 1.15rem 1.2rem 1.2rem;
  border-radius: 1rem;
  border: 1px solid transparent;
  animation: quiz-fade-in 0.32s cubic-bezier(0.23, 1, 0.32, 1);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 10px 28px -16px rgba(0, 0, 0, 0.45);
}

.quiz-feedback--correct {
  background: linear-gradient(165deg, rgba(6, 78, 59, 0.28) 0%, rgba(18, 10, 46, 0.55) 100%);
  border-color: rgba(52, 211, 153, 0.28);
}

.quiz-feedback--incorrect {
  background: linear-gradient(165deg, rgba(76, 29, 149, 0.22) 0%, rgba(40, 18, 36, 0.45) 55%, rgba(18, 10, 46, 0.55) 100%);
  border-color: rgba(167, 139, 250, 0.28);
}

.quiz-feedback__header {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.85rem;
}

.quiz-feedback__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.quiz-feedback--correct .quiz-feedback__icon {
  background: rgba(16, 185, 129, 0.2);
  color: #6ee7b7;
  border: 1px solid rgba(52, 211, 153, 0.35);
}

.quiz-feedback--incorrect .quiz-feedback__icon {
  background: rgba(124, 58, 237, 0.22);
  color: #c4b5fd;
  border: 1px solid rgba(167, 139, 250, 0.35);
}

.quiz-feedback__icon svg {
  width: 1.05rem;
  height: 1.05rem;
}

.quiz-feedback__title {
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  margin: 0;
  line-height: 1.2;
}

.quiz-feedback--correct .quiz-feedback__title {
  color: #6ee7b7;
}

.quiz-feedback--incorrect .quiz-feedback__title {
  color: #e9d5ff;
}

.quiz-feedback__answer {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0 0 0.85rem;
  padding: 0.8rem 0.95rem;
  border-radius: 0.75rem;
  background: rgba(12, 8, 28, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.quiz-feedback__answer-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.quiz-feedback__answer-value {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--text-primary);
  margin: 0;
}

.quiz-feedback__answer-value strong {
  color: #c4b5fd;
  font-weight: 700;
  margin-right: 0.15rem;
}

.quiz-feedback__why-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 0.35rem;
}

.quiz-feedback__body {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.62;
  color: var(--text-prose);
}

/* ── Hint ── */

.quiz-hint {
  margin-top: 1rem;
  padding: 0.9rem 1.05rem;
  border-radius: 0.9rem;
  background: linear-gradient(165deg, rgba(180, 83, 9, 0.12) 0%, rgba(18, 10, 46, 0.4) 100%);
  border: 1px solid rgba(217, 119, 6, 0.28);
  color: #fde68a;
  font-size: 0.88rem;
  line-height: 1.55;
  animation: quiz-fade-in 0.25s ease;
  box-shadow: inset 0 1px 0 rgba(253, 230, 138, 0.06);
}

.quiz-hint strong {
  color: #fef3c7;
  font-weight: 600;
}

.quiz-btn-ghost {
  appearance: none;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.86rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0.45rem 0.35rem;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(167, 139, 250, 0.35);
  transition: color 0.2s ease;
}

.quiz-btn-ghost:hover {
  color: var(--text-soft);
}

.quiz-btn-ghost:disabled {
  opacity: 0.45;
  cursor: default;
}

/* ── Results ── */

.quiz-results-score {
  text-align: center;
  margin: 0.35rem 0 1.6rem;
}

.quiz-score-ring {
  --score-pct: 0;
  width: 9rem;
  height: 9rem;
  margin: 0 auto 1.2rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at center, var(--card-bg) 61%, transparent 62%),
    conic-gradient(
      from -90deg,
      #7C3AED calc(var(--score-pct) * 1%),
      rgba(76, 61, 107, 0.4) 0
    );
  box-shadow:
    0 0 48px -12px rgba(124, 58, 237, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    var(--surface-tier-base);
}

.quiz-score-ring__inner {
  text-align: center;
}

.quiz-score-ring__value {
  display: block;
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
  font-size: 1.95rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1;
}

.quiz-score-ring__label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
}

.quiz-score-summary {
  font-size: 1.08rem;
  color: var(--text-secondary);
  margin: 0 0 0.4rem;
}

.quiz-score-summary strong {
  color: var(--text-primary);
}

.quiz-score-message {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 38ch;
  margin: 0 auto;
  line-height: 1.6;
}

.quiz-reflection {
  margin-top: 0.25rem;
  padding: 1.3rem 1.4rem;
  border-radius: 1.1rem;
  background: linear-gradient(165deg, rgba(76, 29, 149, 0.26) 0%, rgba(18, 10, 46, 0.55) 100%);
  border: 1px solid rgba(167, 139, 250, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 12px 28px -16px rgba(0, 0, 0, 0.4);
}

.quiz-reflection h3 {
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 0.55rem;
  letter-spacing: -0.01em;
}

.quiz-reflection p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.68;
  color: var(--text-prose);
}

.quiz-review {
  margin-top: 2.1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(124, 58, 237, 0.16);
}

.quiz-review__title {
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 1.1rem;
  letter-spacing: -0.015em;
}

.quiz-review-item {
  padding: 1.2rem 0;
  border-top: 1px solid rgba(124, 58, 237, 0.12);
}

.quiz-review-item:first-of-type {
  border-top: none;
  padding-top: 0;
}

.quiz-review-item__q {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 0.55rem;
  line-height: 1.45;
}

.quiz-review-item__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.6rem;
}

.quiz-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.quiz-badge--ok {
  color: #a7f3d0;
  background: rgba(16, 185, 129, 0.14);
  border: 1px solid rgba(52, 211, 153, 0.28);
}

.quiz-badge--miss {
  color: #e9d5ff;
  background: rgba(124, 58, 237, 0.16);
  border: 1px solid rgba(167, 139, 250, 0.28);
}

.quiz-badge--skip {
  color: #fcd34d;
  background: rgba(180, 83, 9, 0.12);
  border: 1px solid rgba(217, 119, 6, 0.28);
}

.quiz-review-item__answer {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin: 0 0 0.35rem;
  line-height: 1.5;
}

.quiz-review-item__answer span {
  color: var(--text-soft);
}

.quiz-review-item__rationale {
  font-size: 0.88rem;
  color: var(--text-prose);
  line-height: 1.6;
  margin: 0.55rem 0 0;
  padding: 0.7rem 0.85rem;
  border-radius: 0.7rem;
  background: rgba(12, 8, 28, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.quiz-error {
  color: #fca5a5;
  text-align: center;
  padding: 2rem 1rem;
}

.quiz-loading {
  text-align: center;
  color: var(--text-muted);
  padding: 3.5rem 1rem;
  font-size: 0.95rem;
}

.quiz-back-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.35rem;
}

@keyframes quiz-fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 480px) {
  .quiz-actions {
    width: 100%;
  }

  .quiz-actions .btn-primary,
  .quiz-actions .btn-secondary {
    flex: 1 1 auto;
    justify-content: center;
    white-space: normal;
    text-align: center;
  }

  .quiz-actions--end {
    flex-direction: column-reverse;
    align-items: stretch;
  }

  .quiz-actions--end .btn-primary,
  .quiz-actions--end .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .quiz-nav-left {
    width: 100%;
  }

  .quiz-nav-left .btn-secondary {
    flex: 1;
    justify-content: center;
  }

  .quiz-option {
    gap: 0.75rem;
    padding: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .quiz-option,
  .quiz-mode-btn,
  .quiz-progress-fill,
  .quiz-feedback,
  .quiz-hint {
    transition: none;
    animation: none;
  }

  .quiz-option:hover:not(:disabled),
  .quiz-mode-btn:hover {
    transform: none;
  }
}