/* quiz.css - Knowledge Quiz modal (loaded by index.html together with assets/js/quiz.js).
   Uses only tokens/primitives from site.css; theme comes from <html data-theme>. */

html.quiz-open { overflow: hidden; }

/* Overlay + dialog */
.quiz-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(2, 6, 23, .55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: quizFadeIn .18s ease;
}
.quiz-modal-hidden { display: none; }

.quiz-container {
  position: relative;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 32px 28px 24px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2);
  animation: quizSlideUp .22s ease;
}
.quiz-container:focus { outline: none; }

@keyframes quizFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes quizSlideUp { from { transform: translateY(16px); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes quizSpin { to { transform: rotate(360deg); } }

.quiz-close-btn {
  position: absolute;
  top: 12px;
  right: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  font-size: 22px;
  line-height: 1;
  color: var(--text-2);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.quiz-close-btn:hover { color: var(--text-1); background: var(--border); }

/* Screens */
.quiz-screen { animation: quizFadeIn .18s ease; }
.quiz-screen:focus { outline: none; }
.quiz-screen-hidden { display: none; }

.quiz-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 40px 0;
  color: var(--text-2);
  font-size: .9rem;
}
.quiz-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border);
  border-top-color: var(--brand-1);
  border-radius: 50%;
  animation: quizSpin .7s linear infinite;
}
.quiz-spinner[hidden] { display: none; }

.quiz-icon-header { margin-bottom: 6px; font-size: 36px; text-align: center; }
.quiz-icon-header img { width: 44px; height: 44px; object-fit: contain; }

.quiz-title {
  margin: 0 0 4px;
  font-size: 1.25rem;
  text-align: center;
  color: var(--text-1);
}
.quiz-subtitle { margin: 0 0 20px; font-size: .9rem; text-align: center; color: var(--text-2); }
.quiz-pick-label {
  margin: 0 0 12px;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-align: center;
  text-transform: uppercase;
  color: var(--text-3);
}

/* Platform grid */
.quiz-platform-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.quiz-platform-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 14px 8px;
  font: 600 .8rem var(--font);
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.quiz-platform-btn:hover { color: var(--text-1); background: var(--surface-2); border-color: var(--brand-1); }
.quiz-platform-icon { width: 32px; height: 32px; object-fit: contain; }

/* Back button */
.quiz-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 40px;
  margin: 0 0 8px;
  padding: 0 4px;
  font: 500 .9rem var(--font);
  color: var(--text-2);
  background: none;
  border: 0;
  cursor: pointer;
}
.quiz-back-btn:hover { color: var(--text-1); }

/* Difficulty */
.quiz-diff-row { display: flex; gap: 10px; justify-content: center; }
.quiz-diff-btn {
  flex: 1;
  max-width: 130px;
  min-height: 44px;
  padding: 11px 0;
  font: 600 .95rem var(--font);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.quiz-diff-btn:hover { box-shadow: var(--shadow-1); }
.quiz-diff-easy   { color: var(--ok);     background: color-mix(in srgb, var(--ok) 12%, var(--surface));     border-color: color-mix(in srgb, var(--ok) 35%, transparent); }
.quiz-diff-medium { color: var(--warn);   background: color-mix(in srgb, var(--warn) 12%, var(--surface));   border-color: color-mix(in srgb, var(--warn) 35%, transparent); }
.quiz-diff-hard   { color: var(--danger); background: color-mix(in srgb, var(--danger) 12%, var(--surface)); border-color: color-mix(in srgb, var(--danger) 35%, transparent); }

/* Progress */
.quiz-progress-row { display: flex; align-items: center; gap: 10px; margin: 0 40px 18px 0; }
.quiz-progress-bar { flex: 1; height: 4px; overflow: hidden; background: var(--border); border-radius: 4px; }
.quiz-progress-fill { height: 100%; background: linear-gradient(to right, var(--brand-1), var(--brand-3)); border-radius: 4px; transition: width .3s ease; }
.quiz-progress-label { font-size: .8rem; font-weight: 600; white-space: nowrap; color: var(--text-2); }

/* Question + options */
.quiz-q-text { margin: 0 0 16px; font-size: 1.05rem; font-weight: 600; line-height: 1.5; color: var(--text-1); }
.quiz-q-text:focus { outline: none; }
.quiz-options { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.quiz-option {
  display: flex;
  align-items: center;
  gap: 11px;
  min-height: 44px;
  padding: 11px 14px;
  font: 500 .9rem var(--font);
  text-align: left;
  color: var(--text-1);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.quiz-option:hover { background: var(--surface-2); border-color: var(--brand-1); }
.quiz-option.quiz-opt-selected { background: var(--surface-2); border-color: var(--brand-1); }
.quiz-opt-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  font-size: .75rem;
  font-weight: 700;
  color: var(--text-2);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 50%;
}
.quiz-opt-selected .quiz-opt-letter { color: #fff; background: var(--brand-1); border-color: var(--brand-1); }

/* Primary / secondary buttons */
.quiz-nav-btn {
  width: 100%;
  min-height: 44px;
  padding: 11px;
  font: 600 .95rem var(--font);
  color: var(--bg);
  background: var(--text-1);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
}
.quiz-nav-btn:disabled { opacity: .35; cursor: default; }
.quiz-nav-btn:not(:disabled):hover { opacity: .88; }
.quiz-nav-btn-secondary { margin-top: 8px; color: var(--text-2); background: transparent; border-color: var(--border); }
.quiz-nav-btn-secondary:not(:disabled):hover { opacity: 1; color: var(--text-1); background: var(--surface-2); }

/* Results */
.quiz-result-score {
  margin: 0 0 4px;
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -.04em;
  text-align: center;
  background: linear-gradient(135deg, var(--brand-1), var(--brand-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.quiz-result-score:focus { outline: none; }
.quiz-result-rating { margin: 0 0 20px; font-size: 1rem; font-weight: 600; text-align: center; color: var(--text-2); }
.quiz-review-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.quiz-review-item {
  padding: 10px 14px;
  font-size: .85rem;
  background: var(--surface-2);
  border-left: 3px solid transparent;
  border-radius: var(--radius-md);
}
.quiz-review-correct { border-left-color: var(--ok); }
.quiz-review-wrong { border-left-color: var(--danger); }
.quiz-review-item strong { display: block; margin-bottom: 3px; font-size: .9rem; color: var(--text-1); }
.quiz-review-answer { color: var(--text-2); }
.quiz-result-actions { display: flex; flex-direction: column; }

@media (max-width: 600px) {
  .quiz-container { padding: 24px 18px 20px; border-radius: var(--radius-lg); }
  .quiz-platform-grid { grid-template-columns: repeat(2, 1fr); }
  .quiz-diff-row { flex-direction: column; gap: 8px; }
  .quiz-diff-btn { max-width: 100%; }
}