/* Motion and responsive — loaded last so it can override.
   The section reveal, the hero's load sequence, every breakpoint, and the
   prefers-reduced-motion opt-out. This file has to come last: its media
   queries and the reduced-motion block exist to override the rules in
   every sheet before it.

   Part of the stylesheet split described in index.html; the <link> order
   there is the cascade order, so this file expects everything above it to
   have loaded first. */

/* ---------- Motion ---------- */
/* One reveal, used on section headings only — cards and list items stay
   still so the page doesn't shimmer on every scroll. */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  filter: blur(6px);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
  filter: none;
  transition: opacity 750ms var(--ease), transform 750ms var(--ease),
    filter 750ms var(--ease);
}

/* Hero load sequence: the one orchestrated moment on the page. The plane
   is left out — it has its own entrance along the contrail. */
.hero__title,
.hero__sub {
  animation: rise 900ms var(--ease) backwards;
}
.hero__title {
  animation-delay: 160ms;
}
.hero__sub {
  animation-delay: 300ms;
}

/* The search and the link beside it are the hero's working controls, so
   they are legible and clickable from the first frame: no stagger delay
   and no blur, only a short travel that settles them with the type. */
.search,
.hero__hint {
  animation: rise-clear 620ms var(--ease);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
    filter: blur(8px);
  }
}

@keyframes rise-clear {
  from {
    transform: translateY(12px);
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
  /* Laptop and below: the desktop rhythm is deliberately airy, but at this
     width it turns into scrolling between one idea and the next. */
  :root {
    --section-pad: clamp(3.75rem, 7vw, 5.5rem);
  }
  .nav__links {
    display: none;
  }
  .nav__mobile { display: block; }
  .section__head {
    margin-bottom: 2.25rem;
  }
}

@media (max-width: 700px) {
  :root {
    --section-pad: 3.25rem;
  }
  .section__head {
    margin-bottom: 1.6rem;
  }
  .hero {
    min-height: 0;
    padding-top: 7.5rem;
  }
  /* Scaled whole rather than resized — the flight path is in fixed pixels
     and would drift out of register with the trail otherwise. */
  .planemark {
    transform: scale(0.82);
    margin-bottom: 0.5rem;
  }
  /* The hero is content-height here, so `margin-top: auto` collapses and
     the strip crowds the hint underneath it. */
  .hero__strip {
    margin-top: 3rem;
  }
  /* Kept low on a phone so the banks never rise under the hero copy —
     `slice` crops the width, which keeps the puffs at a believable size
     rather than squashing a whole bank into the viewport. */
  .band--near {
    height: 9.5rem;
  }
  .band--far {
    height: 8rem;
  }
  /* The hero carries its own search; a second CTA in the bar only makes
     the pill wrap. */
  .nav__cta {
    display: none;
  }
  .search {
    flex-direction: column;
    border-radius: var(--r-lg);
    padding: 0.6rem;
  }
  .search__input {
    padding: 0.6rem 0.75rem;
    text-align: center;
  }
  .search__button {
    width: 100%;
  }
  .footer__top {
    grid-template-columns: 1fr;
  }
  /* Fourteen wrapped chips pushed the first tool most of a screen down, so
     they become one swipeable row that stays reachable under the nav while
     the list scrolls. */
  /* One sticky thing at a time. The filter row is sticky at this width and
     runs to about 170px with the search field and both chip rows in it;
     parking a heading under that would spend a fifth of the viewport on
     furniture, and the pressed category chip already answers the question a
     sticky heading is there to answer. */
  .tool-group__title {
    position: static;
  }
  .filters-bar {
    position: sticky;
    /* Flush with the underside of the floating nav, so nothing shows
       through the gap between them. */
    top: 4.5rem;
    z-index: 20;
    margin-inline: calc(var(--gutter) * -1);
    padding: 0.7rem var(--gutter);
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    margin-bottom: 1.4rem;
  }
  .dirsearch {
    width: 100%;
    margin-bottom: 0.65rem;
  }
  .filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    /* Bleeds the row to the screen edges so a chip can be half-visible and
       read as "there is more this way". */
    margin-inline: calc(var(--gutter) * -1);
    padding-inline: var(--gutter);
    padding-block: 0.15rem;
  }
  .filters::-webkit-scrollbar {
    display: none;
  }
  .filter {
    flex: none;
    scroll-snap-align: start;
  }
  .section__head--row {
    align-items: flex-start;
  }
  .cluster {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
    filter: none;
  }
}