/* ═══════════════════════════════════════════════════
   SECTION: solution — source #solution-b (SALES-05-SOLUTION-B)
   Framed panel: sidebar plus three large principle rows.
═══════════════════════════════════════════════════ */

#solution-b {
  background: var(--c-bg-2);
  padding: var(--sp-section) 0;
  position: relative;
  overflow: hidden;
}

/* Glow, top right */
#solution-b::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 700px; height: 700px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(var(--c-accent-rgb), .18) 0%, transparent 68%);
}

/* Glow, bottom left */
#solution-b::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -60px;
  width: 500px; height: 500px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(var(--c-accent-rgb), .10) 0%, transparent 65%);
}

.solb-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* ── Framed panel ── */
.solb-frame {
  display: grid;
  grid-template-columns: 352px 1fr;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 0 80px rgba(var(--c-accent-rgb), .08),
              0 0 200px rgba(var(--c-accent-rgb), .04);
}

/* ── Sidebar ── */
.solb-sidebar {
  background: var(--c-bg-2);
  border-right: 1px solid var(--c-border);
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--sp-10);
}

.solb-h2 {
  font-family: var(--f-display);
  /* No scale token matches: --fs-600 tops out at 26px and --fs-700 at 52px,
     either of which would resize this heading noticeably. */
  font-size: clamp(22px, 2.2vw, 30px);
  font-weight: var(--fw-black);
  letter-spacing: -.04em;
  line-height: var(--lh-tight);
  color: var(--c-text-1);
  margin: 0 0 var(--sp-5);
}
.solb-sub {
  font-size: var(--fs-300);
  font-weight: var(--fw-medium);
  color: var(--c-accent);
  line-height: 1.75;
}

.solb-sidebar-body { display: flex; flex-direction: column; gap: var(--sp-3) }
.solb-p { font-size: var(--fs-300); color: var(--c-text-3); line-height: 1.75 }
.solb-p-s {
  font-size: var(--fs-300);
  font-weight: var(--fw-semibold);
  color: var(--c-text-2);
  line-height: 1.55;
}
.solb-sidebar-bottom .btn-p { width: 100%; justify-content: center }

/* ── Principles panel ── */
.solb-principles {
  display: flex;
  flex-direction: column;
  /* Source uses #1c1c1c — a hair lighter than the sidebar. --c-bg-3 keeps
     that "slightly raised panel" relationship inside the token system. */
  background: var(--c-bg-3);
}

.solb-principle {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 var(--container-pad);
  border-bottom: 1px solid var(--c-border);
  min-height: 160px;
  position: relative;
  overflow: hidden;
  transition: background var(--dur-base);
}
.solb-principle:last-child { border-bottom: none }
.solb-principle:hover { background: var(--c-bg-4) }

/* Accent rule that wipes up on hover */
.solb-principle::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--c-accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform .35s var(--ease-out);
}
.solb-principle:hover::before { transform: scaleY(1) }

.solb-pnum {
  font-family: var(--f-display);
  font-size: var(--fs-100);
  font-weight: var(--fw-extrabold);
  color: rgba(var(--c-accent-rgb), .3);
  letter-spacing: .06em;
  flex-shrink: 0;
  width: 28px;
  transition: color var(--dur-base);
}
.solb-principle:hover .solb-pnum { color: var(--c-accent) }

.solb-ptext {
  font-family: var(--f-display);
  /* Between --fs-600 and --fs-700; neither is close enough to substitute. */
  font-size: clamp(20px, 2.6vw, 36px);
  font-weight: var(--fw-extrabold);
  letter-spacing: -.035em;
  line-height: var(--lh-tight);
  color: var(--c-text-3);
  transition: color var(--dur-base);
}
.solb-principle:hover .solb-ptext { color: var(--c-text-1) }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .solb-frame { grid-template-columns: 1fr }
  .solb-sidebar { border-right: none; border-bottom: 1px solid var(--c-border) }
  .solb-sidebar-bottom .btn-p { width: auto }
  .solb-principle { min-height: 120px; padding: 0 var(--sp-8) }
}

@media (max-width: 640px) {
  .solb-inner { padding: 0 var(--sp-6) }
  .solb-principle { min-height: 100px; padding: 0 var(--sp-6); gap: var(--sp-5) }
  .solb-pnum { display: none }
}