/* ==========================================================================
   Quiz module styles — mobile-first, shared by the admin manager and the
   public quiz-taking experience. Self-contained; does not depend on the
   existing app CSS.
   ========================================================================== */

:root {
  --q-primary: #4f46e5;
  --q-primary-dark: #4338ca;
  --q-primary-light: #eef2ff;
  --q-success: #059669;
  --q-success-light: #ecfdf5;
  --q-danger: #dc2626;
  --q-danger-light: #fef2f2;
  --q-warning: #d97706;
  --q-warning-light: #fffbeb;
  --q-text: #1f2937;
  --q-muted: #6b7280;
  --q-border: #e5e7eb;
  --q-bg: #f9fafb;
  --q-card: #ffffff;
  --q-radius: 14px;
  --q-radius-sm: 9px;
  --q-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --q-shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
  --q-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

* { box-sizing: border-box; }

body.quiz-body {
  margin: 0;
  font-family: var(--q-font);
  color: var(--q-text);
  background: var(--q-bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

.q-container {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 16px;
}
.q-container--wide { max-width: 1100px; }

/* ---------- Typography & helpers ---------- */
.q-h1 { font-size: 1.5rem; font-weight: 800; margin: 0 0 4px; }
.q-h2 { font-size: 1.15rem; font-weight: 700; margin: 0 0 12px; }
.q-muted { color: var(--q-muted); }
.q-small { font-size: 0.85rem; }
.q-hidden { display: none !important; }
.q-center { text-align: center; }
.q-mt { margin-top: 16px; }
.q-mb { margin-bottom: 16px; }
.q-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.q-spacer { flex: 1; }

/* ---------- Cards ---------- */
.q-card {
  background: var(--q-card);
  border: 1px solid var(--q-border);
  border-radius: var(--q-radius);
  box-shadow: var(--q-shadow);
  padding: 18px;
  margin-bottom: 16px;
}

/* ---------- Buttons ---------- */
.q-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  padding: 12px 18px;
  border-radius: var(--q-radius-sm);
  border: 1px solid transparent;
  background: var(--q-primary);
  color: #fff;
  cursor: pointer;
  transition: filter .15s, background .15s, transform .05s;
  text-decoration: none;
  min-height: 44px; /* touch target */
}
.q-btn:hover { filter: brightness(1.05); }
.q-btn:active { transform: translateY(1px); }
.q-btn:disabled { opacity: .55; cursor: not-allowed; }
.q-btn--block { width: 100%; }
.q-btn--lg { padding: 15px 22px; font-size: 1.05rem; }
.q-btn--secondary { background: #fff; color: var(--q-text); border-color: var(--q-border); }
.q-btn--ghost { background: transparent; color: var(--q-primary); border-color: transparent; }
.q-btn--success { background: var(--q-success); }
.q-btn--danger { background: var(--q-danger); }
.q-btn--warning { background: var(--q-warning); }
.q-btn--sm { padding: 8px 12px; font-size: 0.82rem; min-height: 36px; }
.q-btn--chip {
  background: var(--q-primary-light); color: var(--q-primary-dark);
  border: 1px solid #c7d2fe; padding: 7px 12px; font-size: 0.8rem; min-height: 34px;
}
.q-btn--chip:hover { background: #e0e7ff; }

/* ---------- Forms ---------- */
.q-field { margin-bottom: 14px; }
.q-label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 6px; }
.q-input, .q-textarea, .q-select {
  width: 100%;
  font-family: inherit;
  font-size: 1rem;
  padding: 11px 13px;
  border: 1px solid var(--q-border);
  border-radius: var(--q-radius-sm);
  background: #fff;
  color: var(--q-text);
}
.q-input:focus, .q-textarea:focus, .q-select:focus {
  outline: none; border-color: var(--q-primary);
  box-shadow: 0 0 0 3px var(--q-primary-light);
}
.q-textarea { resize: vertical; min-height: 90px; }
.q-help { font-size: 0.8rem; color: var(--q-muted); margin-top: 4px; }
.q-grid2 { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 600px) { .q-grid2 { grid-template-columns: 1fr 1fr; } }

.q-switch { display: flex; align-items: center; gap: 10px; padding: 8px 0; }
.q-switch input { width: 20px; height: 20px; accent-color: var(--q-primary); }

/* ---------- Badges ---------- */
.q-badge {
  display: inline-block; padding: 3px 9px; border-radius: 999px;
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .03em;
}
.q-badge--draft { background: #f3f4f6; color: #6b7280; }
.q-badge--published { background: var(--q-success-light); color: var(--q-success); }
.q-badge--closed { background: var(--q-warning-light); color: var(--q-warning); }
.q-badge--single { background: var(--q-primary-light); color: var(--q-primary-dark); }
.q-badge--multiple { background: #fef3c7; color: #b45309; }
.q-badge--boolean { background: #dbeafe; color: #1d4ed8; }

/* ==========================================================================
   Admin: quiz list
   ========================================================================== */
.quiz-list { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 720px) { .quiz-list { grid-template-columns: 1fr 1fr; } }

.quiz-card { display: flex; flex-direction: column; gap: 8px; }
.quiz-card__title { font-size: 1.05rem; font-weight: 700; margin: 0; }
.quiz-card__meta { display: flex; gap: 14px; flex-wrap: wrap; color: var(--q-muted); font-size: 0.82rem; }
.quiz-card__meta b { color: var(--q-text); }
.quiz-card__actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 6px; }

/* ==========================================================================
   Admin: editor — question cards
   ========================================================================== */
.qe-question {
  border: 1px solid var(--q-border);
  border-radius: var(--q-radius);
  background: #fff;
  margin-bottom: 14px;
  overflow: hidden;
}
.qe-question__head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; background: #fafafa; border-bottom: 1px solid var(--q-border);
}
.qe-question__num {
  width: 28px; height: 28px; flex: none; border-radius: 50%;
  background: var(--q-primary); color: #fff; font-weight: 700;
  display: flex; align-items: center; justify-content: center; font-size: 0.85rem;
}
.qe-question__body { padding: 14px; }
.qe-quick { display: flex; gap: 7px; flex-wrap: wrap; margin: 10px 0 4px; }

.qe-option {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 8px; border: 1px solid var(--q-border); border-radius: var(--q-radius-sm);
  margin-bottom: 8px; background: #fff;
}
.qe-option.is-correct { border-color: var(--q-success); background: var(--q-success-light); }
.qe-option__mark {
  margin-top: 8px; width: 22px; height: 22px; flex: none; accent-color: var(--q-success);
}
.qe-option .q-input { border: none; padding: 7px 4px; }
.qe-option .q-input:focus { box-shadow: none; }
.qe-option__del {
  border: none; background: transparent; color: var(--q-danger);
  cursor: pointer; font-size: 1.1rem; padding: 6px;
}

/* ==========================================================================
   Public: quiz player
   ========================================================================== */
.quiz-hero { text-align: center; padding: 8px 0 4px; }
.quiz-hero__icon { font-size: 2.6rem; }
.quiz-progress {
  position: sticky; top: 0; z-index: 5; background: var(--q-bg);
  padding: 10px 0; margin-bottom: 6px;
}
.quiz-progress__bar { height: 8px; background: var(--q-border); border-radius: 999px; overflow: hidden; }
.quiz-progress__fill { height: 100%; width: 0; background: var(--q-primary); transition: width .25s; }
.quiz-progress__text { display: flex; justify-content: space-between; font-size: 0.82rem; color: var(--q-muted); margin-top: 6px; }
.quiz-timer { font-weight: 700; }
.quiz-timer.is-low { color: var(--q-danger); }

.play-question__text { font-size: 1.15rem; font-weight: 700; margin: 0 0 16px; }
.play-options { display: flex; flex-direction: column; gap: 10px; }
.play-option {
  display: flex; align-items: center; gap: 12px;
  padding: 14px; border: 2px solid var(--q-border); border-radius: var(--q-radius);
  background: #fff; cursor: pointer; transition: border-color .12s, background .12s;
  font-size: 1rem;
}
.play-option:hover { border-color: #c7d2fe; }
.play-option.selected { border-color: var(--q-primary); background: var(--q-primary-light); }
.play-option__box {
  width: 24px; height: 24px; flex: none; border: 2px solid var(--q-border);
  border-radius: 6px; display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; color: #fff;
}
.play-option.type-single .play-option__box { border-radius: 50%; }
.play-option.selected .play-option__box { background: var(--q-primary); border-color: var(--q-primary); }
/* Review states */
.play-option.correct { border-color: var(--q-success); background: var(--q-success-light); }
.play-option.incorrect { border-color: var(--q-danger); background: var(--q-danger-light); }
.play-option.correct .play-option__box { background: var(--q-success); border-color: var(--q-success); }
.play-option.incorrect .play-option__box { background: var(--q-danger); border-color: var(--q-danger); }

.play-nav { display: flex; gap: 10px; margin-top: 18px; }

/* Result screen */
.result-score {
  font-size: 3rem; font-weight: 800; line-height: 1;
}
.result-ring {
  width: 150px; height: 150px; border-radius: 50%; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  background: conic-gradient(var(--q-primary) var(--deg, 0deg), var(--q-border) 0deg);
}
.result-ring__inner {
  width: 122px; height: 122px; border-radius: 50%; background: #fff;
  display: flex; align-items: center; justify-content: center; flex-direction: column;
}
.result-pass { color: var(--q-success); font-weight: 700; }
.result-fail { color: var(--q-danger); font-weight: 700; }

.review-item { border-left: 4px solid var(--q-border); padding-left: 12px; margin-bottom: 18px; }
.review-item.correct { border-color: var(--q-success); }
.review-item.incorrect { border-color: var(--q-danger); }
.review-ref { font-size: 0.82rem; color: var(--q-muted); margin-top: 6px; }
.review-explain {
  background: var(--q-primary-light); border-radius: var(--q-radius-sm);
  padding: 10px 12px; margin-top: 8px; font-size: 0.9rem;
}

/* ---------- Toast / spinner ---------- */
.q-toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: #111827; color: #fff; padding: 12px 18px; border-radius: 10px;
  box-shadow: var(--q-shadow-lg); z-index: 1000; font-size: 0.9rem; max-width: 90vw;
}
.q-toast.error { background: var(--q-danger); }
.q-toast.success { background: var(--q-success); }

.q-spinner {
  width: 40px; height: 40px; border: 4px solid var(--q-border);
  border-top-color: var(--q-primary); border-radius: 50%;
  animation: q-spin 0.9s linear infinite; margin: 30px auto;
}
@keyframes q-spin { to { transform: rotate(360deg); } }

.q-overlay {
  position: fixed; inset: 0; background: rgba(255,255,255,0.75);
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  z-index: 2000;
}

/* ---------- Modal ---------- */
.q-modal { position: fixed; inset: 0; z-index: 1500; display: flex; align-items: center; justify-content: center; padding: 16px; }
.q-modal__overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.45); }
.q-modal__content {
  position: relative; background: #fff; border-radius: var(--q-radius);
  max-width: 640px; width: 100%; max-height: 90vh; overflow-y: auto;
  box-shadow: var(--q-shadow-lg);
}
.q-modal__header { display: flex; align-items: center; padding: 16px 18px; border-bottom: 1px solid var(--q-border); }
.q-modal__header h3 { margin: 0; font-size: 1.1rem; }
.q-modal__close { margin-left: auto; border: none; background: none; font-size: 1.6rem; cursor: pointer; color: var(--q-muted); line-height: 1; }
.q-modal__body { padding: 18px; }

/* ---------- Stats grid (report) ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (min-width: 700px) { .stat-grid { grid-template-columns: repeat(4, 1fr); } }
.stat-box { background: #fff; border: 1px solid var(--q-border); border-radius: var(--q-radius); padding: 16px; text-align: center; }
.stat-box__value { font-size: 1.6rem; font-weight: 800; color: var(--q-primary); }
.stat-box__label { font-size: 0.8rem; color: var(--q-muted); margin-top: 4px; }

.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 0.85rem; }
.bar-row__label { width: 90px; flex: none; color: var(--q-muted); }
.bar-row__track { flex: 1; background: var(--q-border); border-radius: 999px; height: 14px; overflow: hidden; }
.bar-row__fill { height: 100%; background: var(--q-primary); }
.bar-row__val { width: 56px; flex: none; text-align: right; font-weight: 600; }

.q-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.q-table th, .q-table td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--q-border); }
.q-table th { color: var(--q-muted); font-weight: 600; }
.q-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Sticky action bar for editor on mobile */
.q-actionbar {
  position: sticky; bottom: 0; background: #fff; border-top: 1px solid var(--q-border);
  padding: 12px 16px; display: flex; gap: 10px; margin: 0 -16px -16px; z-index: 10;
}
.q-actionbar .q-btn { flex: 1; }