/* ============================================================
   VG Blog Quiz Reader — Interactive reading experience
   2026-05-30
   ============================================================ */

:root {
  --qr-ink: #0f172a;
  --qr-soft: #334155;
  --qr-mute: #64748b;
  --qr-muted: #94a3b8;
  --qr-bg: #fdfbf6;
  --qr-card: #ffffff;
  --qr-cream: #fff8ee;
  --qr-cream-2: #fffefb;
  --qr-line: #e8e2d2;
  --qr-line-soft: #f1eadd;
  --qr-accent: #dc6b2e;
  --qr-accent-2: #b8511f;
  --qr-gold: #c08329;
  --qr-ok: #16a34a;
  --qr-ok-soft: #dcfce7;
  --qr-bad: #dc2626;
  --qr-bad-soft: #fee2e2;
  --qr-shadow-sm: 0 2px 10px rgba(15,23,42,.05);
  --qr-shadow-md: 0 8px 26px rgba(15,23,42,.10);
  --qr-shadow-lg: 0 16px 50px rgba(15,23,42,.16);
  --qr-radius: 16px;
  --qr-font-serif: "Lora", "Charter", Georgia, "Noto Serif", "Noto Sans Devanagari", serif;
  --qr-font-sans: "Inter", -apple-system, "Segoe UI", Roboto, "Noto Sans Devanagari", sans-serif;
}

/* ============================
   Quiz Card — appears after each section
   ============================ */
.qr-card {
  margin: 32px 0;
  background: var(--qr-card);
  border: 2px solid var(--qr-line);
  border-radius: var(--qr-radius);
  box-shadow: var(--qr-shadow-md);
  overflow: hidden;
  font-family: var(--qr-font-sans);
  transition: border-color .25s, transform .25s, box-shadow .25s;
  position: relative;
}
.qr-card:hover {
  border-color: var(--qr-accent);
}
.qr-card.is-correct {
  border-color: var(--qr-ok);
  background: linear-gradient(135deg, #f0fdf4, #fff);
}
.qr-card.is-wrong {
  border-color: var(--qr-bad);
  background: linear-gradient(135deg, #fef2f2, #fff);
}
.qr-card.is-locked {
  opacity: .92;
}

.qr-card__head {
  padding: 18px 22px 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.qr-card__kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .10em;
  text-transform: uppercase;
  color: var(--qr-accent);
  background: rgba(220,107,46,.10);
  padding: 5px 10px;
  border-radius: 999px;
}
.qr-card__meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--qr-mute);
}
.qr-card__meta .pts {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #fff;
  font-weight: 700;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
}
.qr-card__diff {
  text-transform: uppercase;
  font-weight: 700;
  font-size: 10px;
  letter-spacing: .08em;
  padding: 3px 7px;
  border-radius: 4px;
}
.qr-card__diff.easy  { background: #dcfce7; color: #15803d; }
.qr-card__diff.medium{ background: #fef3c7; color: #92400e; }
.qr-card__diff.hard  { background: #fee2e2; color: #991b1b; }

.qr-card__q {
  padding: 12px 22px 16px;
  font-family: var(--qr-font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--qr-ink);
  line-height: 1.45;
}
@media (max-width: 600px) {
  .qr-card__q { font-size: 16.5px; }
}

.qr-card__opts {
  padding: 0 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.qr-opt {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--qr-cream);
  border: 1.5px solid transparent;
  border-radius: 12px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--qr-ink);
  transition: all .18s ease;
  text-align: left;
  line-height: 1.4;
  width: 100%;
  font-family: inherit;
}
.qr-opt:hover:not(:disabled) {
  background: #fff;
  border-color: var(--qr-accent);
  transform: translateX(3px);
}
.qr-opt:disabled {
  cursor: default;
}
.qr-opt.is-selected {
  background: #fff;
  border-color: var(--qr-accent);
  box-shadow: 0 0 0 4px rgba(220,107,46,.10);
}
.qr-opt.is-correct {
  background: var(--qr-ok-soft);
  border-color: var(--qr-ok);
  color: #14532d;
  font-weight: 600;
}
.qr-opt.is-wrong {
  background: var(--qr-bad-soft);
  border-color: var(--qr-bad);
  color: #7f1d1d;
}
.qr-opt__letter {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1.5px solid var(--qr-line);
  border-radius: 8px;
  font-weight: 700;
  font-size: 13px;
  color: var(--qr-mute);
  text-transform: uppercase;
}
.qr-opt.is-selected .qr-opt__letter {
  background: var(--qr-accent);
  border-color: var(--qr-accent);
  color: #fff;
}
.qr-opt.is-correct .qr-opt__letter {
  background: var(--qr-ok);
  border-color: var(--qr-ok);
  color: #fff;
}
.qr-opt.is-wrong .qr-opt__letter {
  background: var(--qr-bad);
  border-color: var(--qr-bad);
  color: #fff;
}
.qr-opt__text { flex: 1; }
.qr-opt__icon {
  flex-shrink: 0;
  font-size: 20px;
  opacity: 0;
  transform: scale(0.5);
  transition: opacity .2s, transform .2s;
}
.qr-opt.is-correct .qr-opt__icon,
.qr-opt.is-wrong .qr-opt__icon { opacity: 1; transform: scale(1); }

.qr-card__cta {
  padding: 0 22px 18px;
}
.qr-card__cta button {
  width: 100%;
  padding: 14px 22px;
  background: linear-gradient(135deg, var(--qr-accent), var(--qr-accent-2));
  color: #fff;
  border: 0;
  border-radius: 12px;
  font-family: var(--qr-font-sans);
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(220,107,46,.3);
  transition: transform .15s, box-shadow .15s;
}
.qr-card__cta button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(220,107,46,.4);
}
.qr-card__cta button:disabled {
  background: #cbd5e1;
  box-shadow: none;
  cursor: not-allowed;
}

.qr-card__reveal {
  margin: 0 22px 18px;
  padding: 14px 18px;
  background: var(--qr-cream-2);
  border-left: 3px solid var(--qr-accent);
  border-radius: 0 10px 10px 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--qr-soft);
}
.qr-card__reveal strong { color: var(--qr-ink); }
.qr-card__reveal .qr-reveal-head {
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--qr-accent);
  margin-bottom: 6px;
}

.qr-card__footer {
  padding: 10px 22px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: var(--qr-mute);
  border-top: 1px dashed var(--qr-line-soft);
}
.qr-card__footer .qr-stats {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.qr-card__footer .qr-share {
  background: transparent;
  border: 0;
  color: var(--qr-mute);
  cursor: pointer;
  font-weight: 600;
  padding: 4px 6px;
  border-radius: 6px;
}
.qr-card__footer .qr-share:hover { color: var(--qr-accent); background: rgba(220,107,46,.06); }

/* Confetti container */
.qr-confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 5;
}
.qr-confetti span {
  position: absolute;
  top: -10px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  animation: qr-fall 1.4s linear forwards;
}
@keyframes qr-fall {
  0% { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(360px) rotate(540deg); opacity: 0; }
}

/* ============================
   Login modal
   ============================ */
.qr-login-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11,18,32,.55);
  backdrop-filter: blur(2px);
  z-index: 99998;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: qr-fade .2s ease;
}
.qr-login-overlay.is-open { display: flex; }
@keyframes qr-fade { from { opacity: 0; } to { opacity: 1; } }

.qr-login-card {
  background: #fff;
  border-radius: 20px;
  padding: 28px 26px;
  max-width: 380px;
  width: 100%;
  text-align: center;
  box-shadow: var(--qr-shadow-lg);
  font-family: var(--qr-font-sans);
  animation: qr-pop .25s cubic-bezier(.2,.8,.3,1);
}
@keyframes qr-pop { from { transform: scale(.94); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.qr-login-card h3 {
  font-family: var(--qr-font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--qr-ink);
  margin: 0 0 8px;
}
.qr-login-card p {
  font-size: 14px;
  color: var(--qr-mute);
  line-height: 1.6;
  margin: 0 0 18px;
}
.qr-login-icon {
  font-size: 42px;
  margin-bottom: 10px;
}
.qr-login-card .g-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 18px;
  background: #fff;
  color: #1f1f1f;
  border: 1.5px solid #dadce0;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  transition: box-shadow .15s, border-color .15s;
}
.qr-login-card .g-btn:hover {
  border-color: var(--qr-accent);
  box-shadow: var(--qr-shadow-sm);
}
.qr-login-card .qr-login-skip {
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  color: var(--qr-mute);
  text-decoration: underline;
  cursor: pointer;
  background: none;
  border: 0;
}

/* ============================
   Floating score widget (right corner)
   ============================ */
.qr-score-widget {
  position: fixed;
  right: 16px;
  bottom: 16px;
  background: linear-gradient(135deg, #0b1220, #1e293b);
  color: #fff;
  padding: 12px 16px;
  border-radius: 16px;
  font-family: var(--qr-font-sans);
  z-index: 90;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
  cursor: pointer;
  transition: transform .15s;
  opacity: 0;
  transform: translateY(40px);
  pointer-events: none;
}
.qr-score-widget.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.qr-score-widget:hover { transform: translateY(-2px); }
.qr-score-widget__badge {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--qr-accent), var(--qr-gold));
  display: grid;
  place-items: center;
  font-size: 22px;
  flex-shrink: 0;
}
.qr-score-widget__body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 12px;
}
.qr-score-widget__body strong {
  font-size: 16px;
  font-weight: 800;
  color: #fff;
}
.qr-score-widget__body small {
  color: #cbd5e1;
  font-size: 11px;
}
.qr-score-widget__streak {
  color: #fbbf24;
  font-weight: 700;
  font-size: 11px;
  margin-left: auto;
  white-space: nowrap;
}
@media (max-width: 600px) {
  .qr-score-widget { left: 12px; right: 12px; bottom: 12px; min-width: auto; }
}

/* ============================
   End-of-article summary card
   ============================ */
.qr-finale {
  margin: 36px 0;
  padding: 32px 28px;
  background: linear-gradient(135deg, #fff8ee 0%, #fff 60%, #fff8ee 100%);
  border: 2px solid var(--qr-line);
  border-radius: 22px;
  text-align: center;
  box-shadow: var(--qr-shadow-md);
  font-family: var(--qr-font-sans);
}
.qr-finale__emoji { font-size: 54px; margin-bottom: 8px; }
.qr-finale h3 {
  font-family: var(--qr-font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--qr-ink);
  margin: 0 0 6px;
}
.qr-finale p {
  font-size: 15px;
  color: var(--qr-mute);
  margin: 0 0 22px;
  line-height: 1.6;
}
.qr-finale__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 540px;
  margin: 0 auto 24px;
}
@media (max-width: 540px) {
  .qr-finale__stats { grid-template-columns: 1fr 1fr; gap: 10px; }
  .qr-finale__stat:last-child { grid-column: span 2; }
}
.qr-finale__stat {
  background: #fff;
  padding: 16px 12px;
  border-radius: 14px;
  border: 1px solid var(--qr-line-soft);
  text-align: center;
}
.qr-finale__stat strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--qr-accent);
  letter-spacing: -.5px;
  line-height: 1;
}
.qr-finale__stat small {
  display: block;
  font-size: 11px;
  color: var(--qr-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-top: 6px;
  font-weight: 600;
}
.qr-finale__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border: 2px solid var(--qr-line);
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  color: var(--qr-ink);
  margin-bottom: 22px;
}
.qr-finale__badge .emoji { font-size: 22px; }
.qr-finale__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--qr-accent), var(--qr-accent-2));
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  padding: 13px 24px;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(220,107,46,.3);
}
.qr-finale__share {
  margin-left: 10px;
  background: #fff;
  border: 1.5px solid var(--qr-line);
  color: var(--qr-ink);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  padding: 13px 18px;
  border-radius: 12px;
  font-family: inherit;
}

/* Level-up toast */
.qr-levelup {
  position: fixed;
  top: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(-40px);
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #fff;
  padding: 14px 22px;
  border-radius: 14px;
  font-family: var(--qr-font-sans);
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 12px 32px rgba(245,158,11,.45);
  z-index: 99999;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s, transform .3s;
  display: flex;
  align-items: center;
  gap: 10px;
}
.qr-levelup.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Sign-out / not-logged-in mini banner inside card */
.qr-locked-banner {
  margin: 0 22px 16px;
  padding: 12px 14px;
  background: linear-gradient(135deg, #fff8ee, #fffdf7);
  border: 1px dashed var(--qr-accent);
  border-radius: 10px;
  font-size: 13px;
  color: var(--qr-soft);
  display: flex;
  align-items: center;
  gap: 8px;
}
.qr-locked-banner button {
  margin-left: auto;
  background: var(--qr-accent);
  color: #fff;
  border: 0;
  font-family: inherit;
  font-weight: 700;
  font-size: 12px;
  padding: 7px 14px;
  border-radius: 8px;
  cursor: pointer;
}