/* Page styles for faq (owner: page agent; see CONTRIBUTING.md). Shared tokens live in /assets/site.css.
   Composition: a dark head with the question groups as a ruled jump list, then one light reading band where each
   group is a heading column beside its questions, then the closing CTA stage. Questions are native details/summary:
   they open and close with no JavaScript. */

/* ---- Head (dark stage) ---- */
.faq-head { padding-block: clamp(3rem, 1.5rem + 5vw, 6rem) clamp(3rem, 2rem + 4vw, 5rem); }
.faq-head-grid { display: grid; gap: 2.5rem; align-items: end; }
.faq-head h1 { margin: 0 0 0.35em; max-width: 13ch; font-size: var(--step-5); letter-spacing: -0.022em; }
.faq-head .lead { max-width: 40ch; margin: 0; }
.faq-head .button-row { margin-top: 1.75rem; }

.faq-jump ul { list-style: none; margin: 0; padding: 0; border-bottom: 1px solid var(--rule-navy); }
.faq-jump li { max-width: none; border-top: 1px solid var(--rule-navy); }
.faq-jump a {
  display: grid; gap: 0.15rem; padding: 0.9rem 0.25rem 0.9rem 1rem; position: relative;
  text-decoration: none; transition: background-color var(--dur-state) var(--ease-out);
}
.faq-jump a::before {
  content: ""; position: absolute; left: 0; top: 0.95rem; bottom: 0.95rem; width: 2px; background: var(--teal);
  transform-origin: top; transition: transform var(--dur-state) var(--ease-out);
}
.faq-jump a:hover { background: var(--navy-raise); }
.faq-jump a:hover::before { transform: scaleY(1.25); }
.faq-jump .jump-name { color: var(--warm-white); font-size: var(--step-2); font-weight: 750; font-stretch: var(--title-stretch); line-height: 1.2; }
.faq-jump .jump-note { color: var(--mist); font-size: var(--step-0); line-height: 1.45; }

/* ---- Reading band: groups ---- */
.faq-group { display: grid; gap: 1rem 3rem; padding-block: 2.5rem; border-top: 1px solid var(--rule); scroll-margin-top: 5rem; }
.faq-group:first-child { border-top: 0; padding-top: 0; }
.faq-group-head h2 { margin: 0 0 0.3em; font-size: var(--step-4); letter-spacing: -0.022em; }
.faq-group-head p { margin: 0; color: var(--slate); font-size: var(--step-1); max-width: 30ch; }

.faq-list { max-width: 48rem; border-bottom: 1px solid var(--rule); }
.faq-list details { border-top: 1px solid var(--rule); }
.faq-list summary {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  min-height: 3rem; padding: 1.25rem 0.5rem 1.25rem 0; cursor: pointer; list-style: none;
  color: var(--navy); font-size: var(--step-2); font-weight: 750; font-stretch: var(--title-stretch);
  line-height: 1.25; letter-spacing: -0.01em; border-radius: var(--radius-small);
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: ""; flex: none; width: 0.75rem; height: 0.75rem; margin-right: 0.25rem;
  border-right: 2.5px solid var(--teal); border-bottom: 2.5px solid var(--teal);
  transform: translateY(-0.2rem) rotate(45deg); transition: transform var(--dur-state) var(--ease-out);
}
.faq-list details[open] summary::after { transform: translateY(0.15rem) rotate(-135deg); }
.faq-list summary:hover { text-decoration: underline; text-decoration-color: var(--teal); text-decoration-thickness: 2px; text-underline-offset: 0.2em; }
.faq-list summary:focus-visible { outline: var(--focus); outline-offset: 2px; background: var(--mint); }
.faq-answer { padding: 0 0 1.5rem; }
.faq-answer p { margin: 0; max-width: 62ch; }

/* 220ms open. The answer fades and settles everywhere; where the browser can animate details height
   (::details-content + interpolate-size) the panel also grows. Without either, it simply opens. */
.faq-list details[open] .faq-answer { animation: faq-open var(--dur-state) var(--ease-out); }
@keyframes faq-open { from { opacity: 0; transform: translateY(-0.4rem); } to { opacity: 1; transform: none; } }
@supports (interpolate-size: allow-keywords) {
  .faq-list { interpolate-size: allow-keywords; }
  .faq-list details::details-content {
    block-size: 0; overflow: clip;
    transition: block-size var(--dur-state) var(--ease-out), content-visibility var(--dur-state) allow-discrete;
  }
  .faq-list details[open]::details-content { block-size: auto; }
}
@media (prefers-reduced-motion: reduce) {
  .faq-list details[open] .faq-answer { animation: none; }
  .faq-list details::details-content { transition: none; }
  .faq-list summary::after, .faq-jump a, .faq-jump a::before { transition: none; }
}

.faq-more { margin: 2.5rem 0 0; }

/* ---- Closing CTA (dark stage) ---- */
.faq-cta h2 { max-width: 22ch; font-size: var(--step-4); letter-spacing: -0.02em; }
.faq-cta .lead { max-width: 52ch; }
.faq-cta .consent-line { margin-top: 1.75rem; padding-left: 1rem; max-width: 52ch; border-left: 2px solid var(--teal); }

@media (min-width: 60rem) {
  .faq-head-grid { grid-template-columns: 7fr 5fr; gap: 4rem; }
  .faq-group { grid-template-columns: 4fr 8fr; padding-block: 3.5rem; }
  .faq-group-head { position: sticky; top: 6rem; align-self: start; }
}