/*
 * Question Bank Quiz – mobile-first styles
 * Note: kept intentionally lightweight to play nicely with most WP themes.
 *
 * v0.3.x:
 * - Question palette / sheet
 * - Flagged state
 * - Submit confirmation dialog
 * - Better non-JS fallbacks (submit button visible)
 */

.qbq-quiz {
  --qbq-border: rgba(0,0,0,0.12);
  --qbq-muted: rgba(0,0,0,0.62);
  --qbq-surface: #fff;
  --qbq-surface-alt: #f6f7f7;
  --qbq-radius: 14px;
  --qbq-gap: 12px;

  position: relative;
  max-width: 720px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.45;
}

/* Prevent background scrolling while our sheet / confirm dialogs are open. */
body.qbq-modal-open {
  overflow: hidden;
}

@media (prefers-color-scheme: dark) {
  .qbq-quiz {
    --qbq-border: rgba(255,255,255,0.14);
    --qbq-muted: rgba(255,255,255,0.7);
    --qbq-surface: #0f0f10;
    --qbq-surface-alt: #1a1a1c;
  }
}

/* Header */
.qbq-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--qbq-surface);
  border-bottom: 1px solid var(--qbq-border);
  padding: 10px 12px;
}

.qbq-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--qbq-gap);
}

.qbq-progress {
  flex: 1;
  min-width: 0;
}

.qbq-progress-text {
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.qbq-progress-bar {
  height: 6px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(0,0,0,0.08);
  margin-top: 8px;
}

@media (prefers-color-scheme: dark) {
  .qbq-progress-bar { background: rgba(255,255,255,0.12); }
}

.qbq-progress-bar-inner {
  height: 100%;
  width: 0%;
  background: rgba(0,0,0,0.7);
}

@media (prefers-color-scheme: dark) {
  .qbq-progress-bar-inner { background: rgba(255,255,255,0.82); }
}

.qbq-timer {
  flex: 0 0 auto;
  font-size: 14px;
  white-space: nowrap;
}

.qbq-timer-label {
  color: var(--qbq-muted);
  margin-right: 6px;
}

.qbq-timer-value {
  font-weight: 800;
}

/* Result */
.qbq-result {
  border: 1px solid var(--qbq-border);
  background: var(--qbq-surface-alt);
  border-radius: var(--qbq-radius);
  padding: 12px;
  margin: 12px 0;
}

/* Questions */
.qbq-questions {
  padding-left: 0;
  list-style: none;
  margin: 12px 0;
}

.qbq-question {
  border: 1px solid var(--qbq-border);
  border-radius: var(--qbq-radius);
  background: var(--qbq-surface);
  padding: 14px;
  margin-bottom: 14px;
}

.qbq-question.is-flagged {
  border-style: dashed;
}

.qbq-question-text p:last-child {
  margin-bottom: 0;
}

.qbq-question-image img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  margin-top: 10px;
}

.qbq-answers {
  list-style: none;
  padding-left: 0;
  margin: 12px 0 0 0;
  display: grid;
  gap: 10px;
}

.qbq-answer-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border: 1px solid var(--qbq-border);
  border-radius: 12px;
  padding: 12px;
  cursor: pointer;
  user-select: none;
}

.qbq-answer-label input[type="radio"] {
  margin-top: 3px;
  transform: scale(1.15);
}

.qbq-answer-content {
  display: block;
  width: 100%;
}

.qbq-answer-image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  display: block;
  margin-top: 8px;
}

.qbq-answer-label.is-correct {
  border-color: rgba(0,128,0,0.6);
  background: rgba(0,128,0,0.06);
}

.qbq-answer-label.is-wrong {
  border-color: rgba(180,0,0,0.45);
  background: rgba(180,0,0,0.05);
}

.qbq-explanation {
  margin-top: 12px;
  padding: 12px;
  border-radius: 12px;
  background: var(--qbq-surface-alt);
}

/* Buttons */
.qbq-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px; /* good mobile tap target */
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--qbq-border);
  background: var(--qbq-surface);
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
}

.qbq-button:focus {
  outline: 2px solid rgba(0,0,0,0.35);
  outline-offset: 2px;
}

@media (prefers-color-scheme: dark) {
  .qbq-button:focus { outline-color: rgba(255,255,255,0.28); }
}

.qbq-button-primary {
  background: rgba(0,0,0,0.85);
  color: #fff;
  border-color: rgba(0,0,0,0.85);
}

@media (prefers-color-scheme: dark) {
  .qbq-button-primary {
    background: rgba(255,255,255,0.86);
    color: #111;
    border-color: rgba(255,255,255,0.86);
  }
}

/* Nav */
.qbq-nav {
  display: flex;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
  margin: 14px 0;
  flex-wrap: wrap;
}

.qbq-quiz:not(.qbq-enhanced) .qbq-prev,
.qbq-quiz:not(.qbq-enhanced) .qbq-next,
.qbq-quiz:not(.qbq-enhanced) .qbq-palette,
.qbq-quiz:not(.qbq-enhanced) .qbq-flag {
  display: none;
}

.qbq-quiz.qbq-enhanced .qbq-nav {
  position: sticky;
  bottom: 0;
  z-index: 25;
  background: var(--qbq-surface);
  padding: 10px 12px;
  border-top: 1px solid var(--qbq-border);
  padding-bottom: calc(10px + env(safe-area-inset-bottom));
  margin: 0;
}

/* Enhanced (JS) mode: single-question, sticky nav, start screen for mock */
.qbq-start-screen {
  display: none;
}

.qbq-quiz.qbq-enhanced .qbq-question {
  display: none;
}

.qbq-quiz.qbq-enhanced .qbq-question.is-active {
  display: block;
}

/* Mock start screen appears only when JS is active */
.qbq-quiz.qbq-enhanced[data-mode="mock"]:not(.qbq-started) .qbq-app-shell {
  display: none;
}

.qbq-quiz.qbq-enhanced[data-mode="mock"]:not(.qbq-started) .qbq-start-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

.qbq-start-card {
  width: 100%;
  border: 1px solid var(--qbq-border);
  border-radius: var(--qbq-radius);
  padding: 16px;
  background: var(--qbq-surface);
}

.qbq-start-title {
  font-size: 18px;
  font-weight: 900;
  margin-bottom: 6px;
}

.qbq-start-meta {
  color: var(--qbq-muted);
  margin-bottom: 12px;
}

.qbq-start-hint {
  margin-top: 10px;
  color: var(--qbq-muted);
  font-size: 13px;
}

/* Sheet / palette */
.qbq-sheet,
.qbq-confirm {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 100;
}

.qbq-sheet.is-open,
.qbq-confirm.is-open {
  display: block;
}

.qbq-sheet-backdrop,
.qbq-confirm-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.45);
}

.qbq-sheet-panel,
.qbq-confirm-panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0 auto;
  max-width: 720px;
  background: var(--qbq-surface);
  border-top-left-radius: 18px;
  border-top-right-radius: 18px;
  border: 1px solid var(--qbq-border);
  border-bottom: 0;
  box-shadow: 0 -20px 40px rgba(0,0,0,0.18);
  padding-bottom: calc(12px + env(safe-area-inset-bottom));
}

.qbq-sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px;
  border-bottom: 1px solid var(--qbq-border);
}

.qbq-sheet-title {
  font-weight: 900;
}

.qbq-sheet-body {
  padding: 12px;
}

.qbq-palette-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.qbq-palette-item {
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid var(--qbq-border);
  background: var(--qbq-surface-alt);
  font-weight: 800;
  cursor: pointer;
}

.qbq-palette-item.is-answered {
  background: rgba(0,0,0,0.08);
}

@media (prefers-color-scheme: dark) {
  .qbq-palette-item.is-answered { background: rgba(255,255,255,0.14); }
}

.qbq-palette-item.is-flagged {
  border-style: dashed;
}

.qbq-palette-item.is-active {
  outline: 2px solid rgba(0,0,0,0.35);
  outline-offset: 2px;
}

@media (prefers-color-scheme: dark) {
  .qbq-palette-item.is-active { outline-color: rgba(255,255,255,0.28); }
}

.qbq-sheet-stats {
  margin-top: 12px;
  color: var(--qbq-muted);
  font-size: 13px;
}

.qbq-sheet-footer {
  padding: 12px;
  border-top: 1px solid var(--qbq-border);
  display: flex;
  justify-content: flex-end;
}

/* Confirm dialog */
.qbq-confirm-panel {
  bottom: 0;
  padding: 12px;
}

.qbq-confirm-title {
  font-weight: 900;
  font-size: 18px;
  margin-bottom: 8px;
}

.qbq-confirm-body {
  color: var(--qbq-muted);
}

.qbq-confirm-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* Mock list */
.qbq-mock-list-items {
  list-style: none;
  padding-left: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.qbq-mock-list-item {
  border: 1px solid var(--qbq-border);
  border-radius: var(--qbq-radius);
  background: var(--qbq-surface);
  padding: 14px;
}

.qbq-mock-title {
  font-weight: 900;
  text-decoration: none;
}

.qbq-mock-meta {
  color: var(--qbq-muted);
  margin-top: 6px;
}

.qbq-mock-cta {
  margin-top: 12px;
}

/* Attempts list */
.qbq-attempts-title {
  margin: 16px 0 10px 0;
}

.qbq-attempts-list {
  list-style: none;
  padding-left: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.qbq-attempts-item {
  border: 1px solid var(--qbq-border);
  border-radius: var(--qbq-radius);
  background: var(--qbq-surface);
  padding: 14px;
}

.qbq-attempts-row {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
}

.qbq-attempts-bank {
  font-weight: 900;
}

.qbq-attempts-mode {
  margin-left: 8px;
  font-size: 12px;
  color: var(--qbq-muted);
}

.qbq-attempts-meta {
  margin-top: 6px;
  color: var(--qbq-muted);
}

/* App home */
.qbq-app {
  max-width: 720px;
  margin: 0 auto;
}

.qbq-app-topbar {
  margin: 12px 0;
}

.qbq-app-header {
  margin: 14px 0 12px 0;
}

.qbq-app-title {
  font-weight: 1000;
  font-size: 20px;
}

.qbq-app-subtitle {
  margin-top: 6px;
  color: var(--qbq-muted);
}

.qbq-card {
  border: 1px solid var(--qbq-border);
  border-radius: var(--qbq-radius);
  background: var(--qbq-surface);
  padding: 14px;
  margin: 14px 0;
}

.qbq-card-title {
  font-weight: 900;
  margin-bottom: 10px;
}

.qbq-app-form select,
.qbq-app-form input[type="number"],
.qbq-app-form input[type="url"],
.qbq-app-form input[type="text"] {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--qbq-border);
  background: var(--qbq-surface-alt);
  font-size: 16px;
}

.qbq-field {
  margin: 12px 0;
}

.qbq-field-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.qbq-field-checkboxes {
  display: grid;
  gap: 10px;
  align-content: start;
}

.qbq-field-checkboxes label {
  display: flex;
  gap: 10px;
  align-items: center;
}

@media (min-width: 640px) {
  .qbq-quiz {
    font-size: 17px;
  }
  .qbq-palette-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }
  .qbq-field-row {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}


/* App extras (resume/install/revise) */
.qbq-resume-meta,
.qbq-install-text,
.qbq-revise-meta {
  margin-top: 6px;
  color: var(--qbq-muted);
}

.qbq-attempts-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.qbq-attempts-actions .qbq-button {
  width: 100%;
  text-align: center;
}

@media (min-width: 560px) {
  .qbq-attempts-actions {
    flex-direction: row;
    align-items: center;
  }
  .qbq-attempts-actions .qbq-button {
    width: auto;
  }
}