/* ==========================================================================
   Pricing page — Shiksha Grid
   Extends the existing "Chalkline" design tokens from style.css.
   Signature idea: plans are framed as a classroom's own progression —
   Pen & Paper → Slate → Blackboard → Campus — with a chalk-dust flourish
   on the featured tier and a tactile, count-up billing toggle.
   ========================================================================== */

/* ---------- Hero ---------- */
.pricing-hero {
  padding: 64px 0 12px;
  text-align: center;
  position: relative;
}
.pricing-hero .section-head {
  margin-bottom: 28px;
}
.pricing-hero h1 {
  margin-bottom: 14px;
}
.pricing-hero .lead {
  max-width: 620px;
  margin: 0 auto;
  color: var(--ink-faint);
  font-size: 1.06rem;
}

/* ---------- Billing toggle ---------- */
.billing-toggle-wrap {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin: 30px auto 6px;
  padding: 8px;
  background: var(--glass-surface);
  border: 1.5px solid var(--glass-border);
  backdrop-filter: blur(14px);
  border-radius: 999px;
  box-shadow: var(--shadow-card);
}
.billing-toggle {
  position: relative;
  display: inline-flex;
  width: 216px;
  height: 46px;
  border-radius: 999px;
  background: rgba(26, 34, 56, 0.05);
  cursor: pointer;
  user-select: none;
  border: none;
  padding: 0;
}
.billing-toggle .toggle-thumb {
  position: absolute;
  top: 4px;
  left: 4px;
  width: calc(50% - 4px);
  height: calc(100% - 8px);
  border-radius: 999px;
  background: var(--aurora);
  background-size: 200% auto;
  box-shadow: 0 8px 18px -6px rgba(139, 124, 246, 0.55);
  transition: transform 0.38s cubic-bezier(0.65, 0, 0.35, 1);
}
.billing-toggle[data-period="yearly"] .toggle-thumb {
  transform: translateX(100%);
}
.billing-toggle .toggle-opt {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.86rem;
  color: var(--ink-soft);
  transition: color 0.3s ease;
}
.billing-toggle[data-period="monthly"] .toggle-opt.opt-monthly,
.billing-toggle[data-period="yearly"] .toggle-opt.opt-yearly {
  color: #fff;
}
.savings-pill {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--mint);
  background: rgba(46, 196, 182, 0.12);
  border: 1px solid rgba(46, 196, 182, 0.28);
  padding: 6px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------- Grid ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
  margin-top: 46px;
}
@media (max-width: 1100px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 620px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Card shell ---------- */
.price-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px 26px 32px;
  border-radius: var(--radius-lg);
  background: var(--glass-surface);
  border: 1.5px solid var(--glass-border);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-card);
  transition:
    transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.35s ease,
    border-color 0.35s ease;
}
.price-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.price-card .tier-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 10px;
}
.price-card h3 {
  font-family: var(--font-display);
  font-size: 1.32rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 6px;
}
.price-card .tier-desc {
  font-size: 0.88rem;
  color: var(--ink-faint);
  min-height: 40px;
  margin-bottom: 18px;
}

.price-card .price-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 4px;
}
.price-card .price-amt {
  font-family: var(--font-display);
  font-size: 2.15rem;
  font-weight: 800;
  color: var(--ink);
  transition:
    opacity 0.22s ease,
    transform 0.22s ease;
}
.price-card .price-amt.is-swapping {
  opacity: 0;
  transform: translateY(6px);
}
.price-card .price-suffix {
  font-size: 0.88rem;
  color: var(--ink-faint);
  font-weight: 600;
}
.price-card .price-note {
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-bottom: 22px;
  min-height: 18px;
}

.price-card .btn {
  width: 100%;
  margin-bottom: 24px;
}

/* ---------- Feature list ---------- */
.tier-list {
  list-style: none;
  margin: 0 0 4px;
  padding: 0;
  flex: 1;
}
.tier-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--ink-soft);
  padding: 7px 0;
}
.tier-list li i {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  margin-top: 1px;
}
.tier-list li i.bi-check-lg {
  background: rgba(46, 196, 182, 0.14);
  color: var(--mint);
}
.tier-list li i.bi-x-lg {
  background: rgba(255, 107, 107, 0.1);
  color: var(--coral);
}
.tier-list.is-muted li {
  color: var(--ink-faint);
}

.tier-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-faint);
  font-weight: 800;
  font-size: 1rem;
  margin: 6px 0 4px;
  position: relative;
}
.tier-divider::before,
.tier-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}
.tier-divider span {
  padding: 0 10px;
}

/* ---------- Tier variants ---------- */
.price-card.card-manual {
  background: rgba(255, 255, 255, 0.4);
  border-style: dashed;
}
.price-card.card-manual h3 {
  color: var(--ink-soft);
}

.price-card.card-popular {
  border-color: rgba(139, 124, 246, 0.45);
  background: var(--glass-surface-hi);
  box-shadow: 0 10px 20px -8px rgba(139, 124, 246, 0.28), var(--shadow-card);
  transform: translateY(-10px);
  overflow: hidden;
}
.price-card.card-popular:hover {
  transform: translateY(-16px);
}
@media (max-width: 1100px) {
  .price-card.card-popular {
    transform: none;
  }
  .price-card.card-popular:hover {
    transform: translateY(-6px);
  }
}
.price-card.card-popular::before {
  content: "";
  position: absolute;
  inset: -1px;
  padding: 1.5px;
  border-radius: var(--radius-lg);
  background: var(--aurora);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.9;
}
.badge-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--aurora);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  padding: 7px 16px;
  border-radius: 999px;
  box-shadow: 0 10px 18px -6px rgba(139, 124, 246, 0.55);
  white-space: nowrap;
}

.price-card.card-enterprise {
  background: linear-gradient(
    160deg,
    rgba(47, 111, 237, 0.06),
    var(--glass-surface) 60%
  );
}

/* chalk-dust flourish: a few soft rising specks behind the popular card */
.chalk-dust {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  pointer-events: none;
  z-index: 0;
}
.chalk-dust span {
  position: absolute;
  bottom: -10px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #fff;
  opacity: 0;
  animation: chalkRise 6.5s ease-in infinite;
}
.chalk-dust span:nth-child(1) { left: 12%; animation-delay: 0s; }
.chalk-dust span:nth-child(2) { left: 30%; animation-delay: 1.4s; width: 3px; height: 3px; }
.chalk-dust span:nth-child(3) { left: 52%; animation-delay: 2.6s; }
.chalk-dust span:nth-child(4) { left: 68%; animation-delay: 0.8s; width: 3px; height: 3px; }
.chalk-dust span:nth-child(5) { left: 84%; animation-delay: 3.6s; }
.chalk-dust span:nth-child(6) { left: 44%; animation-delay: 4.8s; width: 3px; height: 3px; }

@keyframes chalkRise {
  0% {
    opacity: 0;
    transform: translateY(0) scale(0.6);
  }
  12% {
    opacity: 0.55;
  }
  85% {
    opacity: 0.12;
  }
  100% {
    opacity: 0;
    transform: translateY(-190px) scale(1);
  }
}
@media (prefers-reduced-motion: reduce) {
  .chalk-dust span {
    animation: none;
    opacity: 0;
  }
}

.price-card > * {
  position: relative;
  z-index: 1;
}

/* ---------- Trust strip ---------- */
.trust-strip {
  margin-top: 54px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.trust-strip .chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  padding: 10px 18px;
  border-radius: 999px;
  box-shadow: var(--shadow-card);
}
.trust-strip .chip i {
  color: var(--sky-deep);
}

/* ---------- Footnote ---------- */
.pricing-footnote {
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.82rem;
  margin-top: 24px;
}