/* ============================================================================
   Burton v7 — Problem Router
   ----------------------------------------------------------------------------
   "Start with your problem." — conversational entry point. Deliberately
   NOT a grid of cards (we already have that in the three paths). Instead:
   a vertical list of quoted problems that read like a reader speaking.
   Editorial, warm, human.
   ========================================================================= */

.router {
  padding-block: var(--space-12);
  background: var(--color-surface);
}

@media (min-width: 720px) {
  .router { padding-block: var(--space-16); }
}

@media (min-width: 900px) {
  .router { padding-block: var(--space-20); }
}

.router__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: start;
}

@media (min-width: 900px) {
  .router__inner {
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-16);
  }
}

/* ── Left rail: section heading ──────────────────────────────────────────── */

/* Sticky only where 2-col layout exists — on mobile the header stacks
   above the list normally, no sticky behavior needed. */
@media (min-width: 900px) {
  .router__header {
    position: sticky;
    top: var(--space-20);
  }
}

.router__eyebrow {
  margin-bottom: var(--space-4);
}

.router__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--fs-3xl);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
  color: var(--color-ink);
  margin-bottom: var(--space-5);
}

.router__description {
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--color-ink-muted);
  max-width: 36ch;
}

/* ── Right rail: list of problems ────────────────────────────────────────── */

.router__list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-line);
}

.router__item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-6);
  align-items: baseline;
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--color-line);
  text-decoration: none;
  color: inherit;
  transition: padding-left var(--duration-base) var(--ease-out);
}

.router__item:hover {
  padding-left: var(--space-4);
}

@media (max-width: 600px) {
  .router__item {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

.router__quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: var(--fs-xl);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
  color: var(--color-ink);
  max-width: 38ch;
}

.router__quote::before {
  content: "\201C";
  color: var(--color-ink-subtle);
  margin-right: 0.1em;
}

.router__quote::after {
  content: "\201D";
  color: var(--color-ink-subtle);
  margin-left: 0.05em;
}

.router__answer {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
  text-align: left;
  min-width: 200px;
}

@media (min-width: 600px) {
  .router__answer {
    text-align: right;
    align-items: flex-end;
  }
}

.router__answer-label {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-ink-subtle);
}

.router__answer-title {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--color-ink);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--duration-fast) var(--ease-out),
              gap var(--duration-fast) var(--ease-out);
}

.router__item:hover .router__answer-title {
  color: var(--color-accent);
  gap: var(--space-3);
}

.router__answer-title svg {
  width: 14px;
  height: 14px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.router__item:hover .router__answer-title svg {
  transform: translateX(3px);
}