/* === Question Cards === */
.questions-grid {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.question-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition);
  overflow: hidden;
}

.question-card:hover {
  box-shadow: var(--shadow-hover);
}

/* === Collapsible wrapper === */
.question-card__summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.45rem 0.75rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--transition);
}

.question-card__summary:hover {
  background: color-mix(in srgb, var(--color-accent) 6%, transparent);
}

.question-card__summary:hover::after {
  color: var(--color-accent);
}

.question-card__rows {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.question-card__row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  min-width: 0;
}

.question-card__summary::-webkit-details-marker {
  display: none;
}

.question-card__summary::after {
  content: '\25B8';
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--color-text-light);
  transition: transform 0.15s;
  flex-shrink: 0;
}

.question-card__collapsible[open] > .question-card__summary::after {
  transform: rotate(90deg);
}

.question-card__collapsible[open] > .question-card__summary {
  border-bottom: 1px solid var(--color-border);
}

.question-card__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

.question-card__meta {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.question-card__meta-right {
  display: flex;
  gap: 0.3rem;
  align-items: center;
  flex-shrink: 0;
}

/* === Expanded content === */
.question-card__body {
  padding: 0.5rem 0.75rem;
  font-size: 0.95rem;
  line-height: 1.7;
  overflow-x: auto;
}

.question-card__body img {
  max-width: min(45em, 100%);
  border-radius: var(--radius);
  margin-top: 0.5rem;
}

.question-card__solution,
.question-card__criteria {
  border-top: 1px solid var(--color-border);
  margin: 0 0.75rem;
}

.question-card__solution summary,
.question-card__criteria summary {
  padding: 0.4rem 0;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--color-accent);
  user-select: none;
  list-style: none;
}

.question-card__solution summary::-webkit-details-marker,
.question-card__criteria summary::-webkit-details-marker {
  display: none;
}

.question-card__solution summary:hover,
.question-card__criteria summary:hover {
  color: var(--color-secondary);
}

.question-card__solution-content {
  padding: 0.5rem 0 0.75rem;
  line-height: 1.7;
  font-size: 0.9rem;
  overflow-x: auto;
}

.question-card__solution-content img {
  max-width: min(29em, 100%);
  border-radius: var(--radius);
  margin-top: 0.5rem;
  zoom: 0.7;
}

.question-card__tags {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  padding: 0.3rem 0.75rem;
  border-top: 1px solid var(--color-border);
}

/* === Difficulty badge === */
.badge--difficulty {
  background: #f3f4f6;
  color: #374151;
  border: 1px solid #d1d5db;
}

.badge--foundation {
  background: #f1f5f9;
  color: #334155;
  border-color: #cbd5e1;
}

.badge--development {
  background: #e0f2fe;
  color: #0369a1;
  border-color: #7dd3fc;
}

.badge--mastery {
  background: #ede9fe;
  color: #6d28d9;
  border-color: #c4b5fd;
}

.badge--challenge {
  background: #fce7f3;
  color: #9d174d;
  border-color: #f9a8d4;
}

.badge--mc {
  background: #e0f2fe;
  color: #0369a1;
  border-color: #7dd3fc;
}

.badge--mc-off {
  background: var(--color-bg-alt, #f1f5f9);
  color: var(--color-text-light, #94a3b8);
  border-color: currentColor;
}

.inline-mc-btn {
  cursor: pointer;
  border: none;
  font: inherit;
}

/* === Source badge === */
.badge--source {
  background: #f1f5f9;
  color: #475569;
  border: 1px solid #cbd5e1;
}

/* === Topic colour badges === */
.badge--topic-blue {
  background: #dbeafe;
  color: #1d4ed8;
  border-color: #93c5fd;
}

.badge--topic-green {
  background: #d1fae5;
  color: #065f46;
  border-color: #6ee7b7;
}

.badge--topic-red {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fca5a5;
}

.badge--topic-purple {
  background: #ede9fe;
  color: #6d28d9;
  border-color: #c4b5fd;
}

/* === Dark Mode Badge Overrides === */
[data-theme="dark"] .badge--difficulty {
  background: #2a2a40;
  color: #c0c0d0;
  border-color: #3a3a50;
}

[data-theme="dark"] .badge--foundation {
  background: #1e2a3a;
  color: #94a3b8;
  border-color: #334155;
}

[data-theme="dark"] .badge--development {
  background: #0c2a4a;
  color: #7dd3fc;
  border-color: #1e5a8a;
}

[data-theme="dark"] .badge--mastery {
  background: #1e1040;
  color: #c4b5fd;
  border-color: #3b2080;
}

[data-theme="dark"] .badge--challenge {
  background: #3a1028;
  color: #f9a8d4;
  border-color: #6b1a40;
}

[data-theme="dark"] .badge--mc {
  background: #0c2a3f;
  color: #7dd3fc;
  border-color: #1a5070;
}

[data-theme="dark"] .badge--mc-off {
  background: var(--color-bg-alt);
  color: var(--color-text-light);
  border-color: currentColor;
}

[data-theme="dark"] .badge--source {
  background: #1e2a3a;
  color: #94a3b8;
  border-color: #334155;
}

[data-theme="dark"] .badge--topic-blue {
  background: #1e3050;
  color: #93c5fd;
  border-color: #2a5090;
}

[data-theme="dark"] .badge--topic-green {
  background: #0a2a20;
  color: #6ee7b7;
  border-color: #1a5040;
}

[data-theme="dark"] .badge--topic-red {
  background: #3a1a1a;
  color: #fca5a5;
  border-color: #5a2a2a;
}

[data-theme="dark"] .badge--topic-purple {
  background: #2e1a5a;
  color: #c4b5fd;
  border-color: #5b3a9a;
}

/* === Pagination === */
.pagination {
  display: flex;
  justify-content: center;
  margin-top: 1.5rem;
}

/* === Worksheet checkbox === */
.question-card__checkbox {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  cursor: pointer;
}

.question-card__checkbox input[type="checkbox"] {
  width: 1.4rem;
  height: 1.4rem;
  cursor: pointer;
  accent-color: var(--color-accent);
}

@keyframes checkbox-pop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.35); }
  70%  { transform: scale(0.9); }
  100% { transform: scale(1); }
}

.question-card__checkbox:has(input:checked) {
  animation: checkbox-pop 0.22s ease-out;
}

/* === Selected card highlight === */
.question-card--selected {
  border-left: 3px solid var(--color-accent);
  background-color: color-mix(in srgb, var(--color-accent) 8%, transparent);
}

.question-card--saving {
  opacity: 0.6;
  pointer-events: none;
}

/* === Calculator Icon === */
.calc-icon {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

/* Inline in worksheet question number line */
.worksheet-question__number ~ .calc-icon {
  margin: 0 0.35rem;
  vertical-align: middle;
  position: relative;
  top: -1px;
}

/* === Flag Button === */
.flag-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.2rem;
  border-radius: 4px;
  color: var(--color-text-light);
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
}

.flag-btn:hover {
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
}

/* === Flag Popover === */
.flag-popover {
  position: absolute;
  z-index: 300;
  width: 300px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  padding: 0.75rem;
  font-size: 0.85rem;
}

.flag-popover__header {
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.flag-popover__honeypot {
  display: none !important;
}

.flag-popover__comment {
  width: 100%;
  padding: 0.4rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.82rem;
  background: var(--color-bg);
  color: var(--color-text);
  box-sizing: border-box;
}

.flag-popover__footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

/* === Results Count === */
.results-count {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
}