/* Micro-interactions. Every effect here is decorative: content is fully usable without it,
   and prefers-reduced-motion switches it off (see the block at the end). */

/* ---------- Cross-page fade (supporting browsers only) ---------- */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vt-out 220ms var(--ease) both; }
::view-transition-new(root) { animation: vt-in 380ms var(--ease) both; }
@keyframes vt-out { to { opacity: 0; } }
@keyframes vt-in { from { opacity: 0; } }

/* ---------- Scroll progress hairline ---------- */
.scroll-progress { position: fixed; inset-block-start: 0; inset-inline: 0; height: 2px; z-index: calc(var(--z-header) + 1); pointer-events: none; }
.scroll-progress span { display: block; height: 100%; background: linear-gradient(90deg, var(--brass), #F1CB85); transform-origin: var(--origin-start, left); transform: scaleX(var(--progress, 0)); }

/* ---------- Header hides on scroll down, returns on scroll up ---------- */
.site-header { transition: background-color var(--t-state) var(--ease), box-shadow var(--t-state) var(--ease), transform 420ms var(--ease); }
.site-header.is-hidden { transform: translateY(-100%); }
.site-header:focus-within { transform: none; }

/* ---------- Brand lockup ---------- */
.brand-mark { transition: transform 600ms var(--ease), filter 600ms var(--ease); }
.brand:hover .brand-mark { transform: translateY(-2px); filter: drop-shadow(0 6px 14px rgba(211, 155, 61, .35)); }

/* ---------- Buttons: sheen on primary, fill wipe on ghost ---------- */
.btn { position: relative; overflow: hidden; isolation: isolate; }
.btn--primary::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(110deg, transparent 20%, rgba(255, 255, 255, .45) 45%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 800ms var(--ease);
}
.btn--primary:hover::after { transform: translateX(120%); }
.btn--ghost { background-image: linear-gradient(var(--fg), var(--fg)); background-repeat: no-repeat; background-size: 0% 100%; background-position: var(--origin-start, left) center; transition: background-size 420ms var(--ease), color 260ms var(--ease), border-color 260ms var(--ease); }
.btn--ghost:hover { background-size: 100% 100%; color: var(--bg); border-color: var(--fg); }
.btn[data-magnetic] { transition: transform 300ms var(--ease), background-color var(--t-fast) var(--ease); }

/* ---------- Text links: underline that draws in ---------- */
.text-link {
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-size: 100% 1px;
  background-position: var(--origin-start, left) calc(50% + .72em);
  transition: background-size 420ms var(--ease);
}
.text-link:hover { background-size: 0% 1px; background-position: var(--origin-end, right) calc(50% + .72em); }
.text-link::after { content: ""; display: inline-block; width: .5em; height: .5em; margin-inline-start: .5em; border-block-start: 1.5px solid currentColor; border-inline-end: 1.5px solid currentColor; transform: rotate(var(--chev, 45deg)); transition: transform 300ms var(--ease); }
.text-link:hover::after { transform: translateX(var(--nudge, 4px)) rotate(var(--chev, 45deg)); }

/* ---------- Photos: slow zoom on hover, reveal when scrolled into view ---------- */
@media (hover: hover) and (pointer: fine) {
  .offer .photo img, .plane .photo img, .gallery .photo img, .detail-strip .photo img, .split .photo img {
    transition: transform 1200ms var(--ease);
  }
  .offer:hover .photo img, .plane:hover .photo img, .gallery .photo:hover img, .detail-strip .photo:hover img, .split .photo:hover img {
    transform: scale(1.045);
  }
}
.js-motion .reveal-img { clip-path: inset(0 0 100% 0); }
.js-motion .reveal-img img { transform: scale(1.14); }
.js-motion .reveal-img.is-in { clip-path: inset(0 0 0 0); transition: clip-path 1100ms var(--ease); }
.js-motion .reveal-img.is-in img { transform: scale(1); transition: transform 1600ms var(--ease); }

/* ---------- Section headings: line rises out of a mask, once ---------- */
.js-motion .reveal-head { clip-path: inset(0 0 -10% 0); }
.js-motion .reveal-head > * { transform: translateY(40px); opacity: 0; }
.js-motion .reveal-head.is-in > * { transform: none; opacity: 1; transition: transform 900ms var(--ease), opacity 900ms var(--ease); }
.js-motion .reveal-head.is-in > *:nth-child(2) { transition-delay: 120ms; }

/* ---------- Ruled lists: the rule fills with brass on hover ---------- */
.ruled-list > li { position: relative; }
.ruled-list > li::before {
  content: "";
  position: absolute;
  inset-block-start: -1px;
  inset-inline: 0;
  height: 1px;
  background: var(--brass);
  transform: scaleX(0);
  transform-origin: var(--origin-start, left);
  transition: transform 700ms var(--ease);
}
@media (hover: hover) { .ruled-list > li:hover::before { transform: scaleX(1); } }

/* ---------- Spec table rows ---------- */
.spec-table tbody tr { transition: background-color 200ms var(--ease); }
@media (hover: hover) { .spec-table tbody tr:hover { background: color-mix(in srgb, var(--brass) 8%, transparent); } }

/* ---------- Form fields: brass line grows under the focused field ---------- */
.field { position: relative; }
.field input, .field select, .field textarea { transition: border-color 200ms var(--ease), background-color 200ms var(--ease), box-shadow 300ms var(--ease); }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { box-shadow: inset 0 -2px 0 var(--focus); outline: none; }
.field:focus-within > label, .field:focus-within > .label { color: var(--link); transition: color 200ms var(--ease); }
.choice span { transition: background-color 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease), transform 150ms var(--ease); }
.choice:active span { transform: scale(.97); }
.choice input:checked + span::before { content: ""; width: .5em; height: .9em; margin-inline-end: .55em; border-bottom: 2px solid currentColor; border-right: 2px solid currentColor; transform: rotate(45deg) translateY(-2px); animation: tick 260ms var(--ease); }
@keyframes tick { from { opacity: 0; transform: rotate(45deg) translateY(-2px) scale(.4); } }
.form-status:not(:empty) { animation: rise 420ms var(--ease); }
.error-summary:not([hidden]) { animation: rise 420ms var(--ease); }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }

/* ---------- FAQ accordion ---------- */
.faq-list { display: grid; border-block-start: 1px solid var(--rule); }
.faq { border-block-end: 1px solid var(--rule); }
.faq summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  min-height: 64px;
  padding-block: 18px;
  font-weight: 600;
  font-size: var(--fs-m);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  background: linear-gradient(currentColor, currentColor) center / 100% 1.5px no-repeat, linear-gradient(currentColor, currentColor) center / 1.5px 100% no-repeat;
  transition: transform 360ms var(--ease);
}
.faq[open] summary::after { transform: rotate(135deg); }
.faq summary:hover { color: var(--link); }
.faq-a { padding-block-end: 22px; color: var(--fg-2); max-width: 70ch; }
.faq::details-content { block-size: 0; overflow: hidden; transition: block-size 420ms var(--ease), content-visibility 420ms allow-discrete; }
.faq[open]::details-content { block-size: auto; }
:root { interpolate-size: allow-keywords; }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  inset-inline-end: 20px;
  inset-block-end: calc(20px + env(safe-area-inset-bottom));
  z-index: calc(var(--z-sticky) - 1);
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--hangar);
  color: var(--mist);
  border: 1px solid rgba(237, 239, 238, .18);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 300ms var(--ease), transform 300ms var(--ease), background-color 200ms var(--ease);
}
.to-top svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.to-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { background: var(--brass); color: var(--ink); }
.has-sticky-bar .to-top { inset-block-end: calc(92px + env(safe-area-inset-bottom)); }

/* ---------- Gateway board & intent list polish ---------- */
.board-verb { transition: letter-spacing 500ms var(--ease); }
@media (hover: hover) { .board-list a:hover .board-verb { letter-spacing: .02em; } }

/* ---------- Reduced motion: switch everything above off ---------- */
@media (prefers-reduced-motion: reduce) {
  @view-transition { navigation: none; }
  .site-header.is-hidden { transform: none; }
  .btn--primary::after { display: none; }
  .js-motion .reveal-img, .js-motion .reveal-head { clip-path: none; }
  .js-motion .reveal-img img, .js-motion .reveal-head > * { transform: none; opacity: 1; }
}