/* ============================================================
   WHY CJ MUSIC ACADEMY (Prompt 7) — dark value/trust section.
   Split: sticky intro + numbered value items + journey motif.
   No-JS safe; reduced-motion safe; PWA-identical rendering.
   ============================================================ */

.why {
  background:
    radial-gradient(760px 420px at 88% 8%, rgba(18, 151, 254, 0.10) 0%, transparent 60%),
    var(--cj-navy-deep);
  color: var(--cj-text-inverse);
  padding-block: var(--cj-space-16) var(--cj-space-20);
}
.why .cj-eyebrow { color: var(--cj-primary); }
.why h2 { color: #fff; font-size: clamp(1.75rem, 4.5vw, 2.75rem); }
.why-copy { color: #C7D5E4; font-size: clamp(1rem, 2.4vw, 1.125rem); line-height: 1.65; max-width: 480px; }
.why .btn-ghost { border-color: rgba(255, 255, 255, 0.4); color: #fff; background: transparent; }
.why .btn-ghost:hover { border-color: #fff; color: #fff; background: rgba(255, 255, 255, 0.08); transform: translateY(-1px); }

.why-grid { display: grid; gap: var(--cj-space-12); }

/* Value items: number + icon + title + desc + separator. */
.why-list { list-style: none; padding: 0; margin: 0; display: grid; }
.why-item {
  position: relative;
  display: grid; grid-template-columns: auto auto 1fr; gap: var(--cj-space-4);
  align-items: start;
  padding: var(--cj-space-4) var(--cj-space-3);
  border-bottom: 1px solid var(--cj-border-dark);
  border-radius: var(--radius-md);
  transition: background var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}
/* Blue line expands on hover / scroll-highlight. */
.why-item::before {
  content: ""; position: absolute; left: 0; top: var(--cj-space-4); bottom: var(--cj-space-4);
  width: 3px; border-radius: 3px; background: var(--cj-primary);
  transform: scaleY(0); transform-origin: top;
  transition: transform var(--duration-base) var(--ease-out);
}
.why-num {
  font-family: var(--font-display); font-weight: 800; font-size: 0.9375rem;
  color: var(--cj-primary); opacity: 0.55; padding-top: 2px; min-width: 2ch;
}
.why-icon {
  width: 44px; height: 44px; flex-shrink: 0; border-radius: var(--radius-md);
  display: grid; place-items: center;
  background: rgba(18, 151, 254, 0.12); color: var(--cj-primary);
  transition: transform var(--duration-base) var(--ease-out), background var(--duration-base);
}
.why-icon svg { width: 22px; height: 22px; }
.why-item h3 { color: #fff; font-size: 1.0625rem; margin-bottom: var(--space-1); }
.why-item p { color: #9FB3C8; font-size: 0.9375rem; line-height: 1.6; margin: 0; }

@media (hover: hover) and (pointer: fine) {
  .why-item:hover { background: rgba(18, 151, 254, 0.06); transform: translateY(-2px); }
  .why-item:hover::before, .why-item.is-active::before { transform: scaleY(1); }
  .why-item:hover .why-icon { transform: translateY(-2px); background: rgba(18, 151, 254, 0.2); }
}
.why-item.is-active { background: rgba(18, 151, 254, 0.06); }
.why-item.is-active::before { transform: scaleY(1); }

/* Journey motif: LEARN → PRACTICE → TRACK → IMPROVE (secondary). */
.why-path {
  list-style: none; padding: 0; margin: var(--cj-space-8) 0 0;
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-3);
}
.why-path li {
  display: inline-flex; align-items: center; gap: var(--space-3);
  font-size: 0.75rem; font-weight: 800; letter-spacing: 0.14em; color: #7E93AA;
}
.why-path li + li::before { content: ""; width: 28px; height: 2px; border-radius: 2px; background: var(--cj-border-dark); }
.why-path li:last-child { color: var(--cj-primary); }

/* Mobile: stacked cards. */
@media (max-width: 767px) {
  .why-item { background: var(--cj-surface-dark); border: 1px solid var(--cj-border-dark); border-radius: var(--radius-lg); margin-bottom: var(--space-3); }
  .why-item::before { display: none; }
  .why-item { border-left: 3px solid transparent; }
  .why-item.is-active { border-left-color: var(--cj-primary); }
}

/* Tablet: 2-column item grid. */
@media (min-width: 768px) and (max-width: 1023px) {
  .why-list { grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
  .why-item { border: 1px solid var(--cj-border-dark); border-radius: var(--radius-lg); }
  .why-item::before { display: none; }
}

/* Desktop: sticky intro + single-column list. */
@media (min-width: 1024px) {
  .why-grid { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: var(--cj-space-16); align-items: start; }
  .why-intro-sticky { position: sticky; top: calc(var(--cj-header-h) + var(--cj-space-8)); display: grid; gap: var(--cj-space-4); align-content: start; }
}