.faq-hero {
  min-height: 72dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.faq-hero > div { max-width: 1050px; }

.faq-layout {
  display: grid;
  grid-template-columns: minmax(210px, 3fr) minmax(0, 9fr);
  align-items: start;
  gap: clamp(2rem, 5vw, 5rem);
  padding-top: 0;
}

.faq-sidebar { position: sticky; top: 8rem; }

.faq-sidebar-inner {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.25rem;
  border: 1px solid var(--hairline);
  border-radius: 1.5rem;
  background: rgba(9, 29, 44, 0.8);
  box-shadow: inset 0 1px 0 rgba(181, 238, 252, 0.08);
  backdrop-filter: blur(16px);
}

.faq-sidebar-label {
  margin: 0.25rem 0 0.75rem;
  color: var(--accent-slate);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.faq-category-link {
  display: grid;
  grid-template-columns: 2rem 1fr;
  align-items: center;
  min-height: 3rem;
  border-radius: 0.85rem;
  color: var(--text-muted);
  padding: 0.65rem 0.8rem;
  font-size: 0.85rem;
  text-decoration: none;
  transition: color 0.3s ease, background 0.3s ease;
}

.faq-category-link:hover,
.faq-category-link.active {
  color: var(--text-main);
  background: rgba(49, 209, 237, 0.1);
}

.faq-category-link > span { font-weight: 600; }

.faq-content { min-width: 0; }

.faq-category {
  scroll-margin-top: 8rem;
  margin-bottom: clamp(5rem, 10vh, 8rem);
}

.faq-category-heading {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.faq-category-heading > span {
  color: var(--accent-slate);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
}

.faq-category-heading h2 { font-size: clamp(1.8rem, 4vw, 3rem); }

.faq-item {
  border: 1px solid var(--hairline-subtle);
  border-radius: 1.35rem;
  background: rgba(9, 29, 44, 0.72);
  overflow: hidden;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.faq-item + .faq-item { margin-top: 1rem; }
.faq-item.open { border-color: rgba(49, 209, 237, 0.32); background: rgba(12, 40, 58, 0.88); }
.faq-item h3 { margin: 0; }

.faq-question {
  width: 100%;
  min-height: 5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  border: 0;
  background: transparent;
  color: var(--text-main);
  padding: 1.4rem 1.65rem;
  font: inherit;
  font-size: 1.05rem;
  font-weight: 650;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
}

.faq-question:focus-visible { outline: 2px solid var(--accent-slate); outline-offset: -4px; }

.faq-icon {
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid var(--hairline);
  border-radius: 50%;
  color: var(--accent-slate);
  font-size: 1.35rem;
  font-weight: 300;
  transition: transform 0.35s var(--ease-fluid), background 0.35s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
  background: rgba(49, 209, 237, 0.1);
}

.faq-answer[hidden] { display: none; }

.faq-answer-inner {
  padding: 0 1.65rem 1.65rem;
  border-top: 1px solid var(--hairline-subtle);
  color: var(--text-muted);
  line-height: 1.8;
}

.faq-answer-inner p { margin-top: 1.25rem; }
.faq-answer-inner ul { margin: 1rem 0 0 1.3rem; }
.faq-answer-inner li { margin-top: 0.55rem; padding-left: 0.3rem; }

@media (max-width: 1050px) {
  .nav-island .nav-links { gap: 0; }
  .nav-links a,
  .about-menu-toggle { padding-left: 0.62rem; padding-right: 0.62rem; }
}

@media (max-width: 900px) {
  .faq-layout { grid-template-columns: 1fr; }
  .faq-sidebar { position: static; }
  .faq-sidebar-inner { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .faq-sidebar-label { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .faq-hero { min-height: auto; padding-top: 9rem; }
  .faq-sidebar-inner { grid-template-columns: 1fr; }
  .faq-sidebar-label { grid-column: auto; }
  .faq-question { min-height: 4.5rem; padding: 1.15rem; font-size: 1rem; }
  .faq-answer-inner { padding: 0 1.15rem 1.3rem; }
}