.solution {
  background-color: var(--color-bg-primary);
  padding-block: clamp(5rem, 10vw, 9rem);
}

.solution__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

/* ─── Content ────────────────────────────────────── */
.solution__content h2 { margin-bottom: var(--space-5); }

.solution__body {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

/* ─── Checklist ──────────────────────────────────── */
.solution__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.solution__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.solution__check {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-accent-red-dim);
  border: 1px solid var(--color-accent-red-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-red);
  margin-top: 2px;
}

.solution__item strong {
  color: var(--color-text-primary);
}

/* ─── Spec box ───────────────────────────────────── */
.solution__spec-inner {
  background: var(--color-bg-card);
  border: 1px solid var(--color-accent-red-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  position: sticky;
  top: 100px;
}

.solution__spec-label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.solution__spec-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.solution__spec-list li {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.solution__spec-list li span {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.solution__spec-list li strong {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.solution__spec-footer {
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.solution__spec-footer span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-red);
}

/* ─── Responsive ─────────────────────────────────── */
@media (max-width: 900px) {
  .solution__container {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
  .solution__spec-inner { position: static; }
}