/* Split for the 300-line cap — order matters, keep sequence. */
/* ==========================================================================
   FastNet Stays — Canonical Loading System (loading.css)

   ONE stylesheet for every loading state in the product. Before this existed
   the site carried five unrelated implementations (app-loader, p-dots,
   home-loader, home shimmer, portal bar) with duplicated @keyframes and
   hand-rolled markup in 20+ places.

   Everything here is driven by the tokens below so a brand change lands in one
   edit, and every animation collapses under prefers-reduced-motion.

     --fn-brand      primary action colour
     --fn-brand-ink  gradient partner for the progress bar
     --fn-surface    skeleton base colour
     --fn-surface-2  skeleton highlight (the sweep)
     --fn-radius     corner radius
     --fn-dur-*      shared durations so motion feels identical everywhere
     --fn-ease       shared easing curve

   Usage:
     <span class="fn-dots" aria-hidden="true"><i></i><i></i><i></i></span>
     <div class="fn-spinner"></div>
     <div class="fn-skeleton"><div class="fn-skeleton-line w60"></div></div>
   ========================================================================== */

:root {
  --fn-brand: #0f62fe;
  --fn-brand-ink: #1a73e8;
  --fn-surface: #e8eaed;
  --fn-surface-2: #f6f8fa;
  --fn-radius: 8px;

  --fn-dur-fast: 140ms;
  --fn-dur-base: 220ms;
  --fn-dur-slow: 320ms;

  /* Material-style standard curve: fast out, gentle settle. */
  --fn-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   1. Motion primitives — the only @keyframes the loading system owns.
   -------------------------------------------------------------------------- */

@keyframes fn-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes fn-breathe {
  0%,
  100% {
    opacity: 0.38;
    transform: scale(0.86);
  }
  40% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Single unidirectional sweep. The previous skeletons alternated direction,
   which made a loading state look like it was running backwards. */
@keyframes fn-sweep {
  from {
    background-position: 200% 0;
  }
  to {
    background-position: -200% 0;
  }
}

@keyframes fn-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fn-bar-enter {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   2. Top progress bar
   -------------------------------------------------------------------------- */

.fn-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 999999;
  width: 0%;
  height: 2px;
  pointer-events: none;
  opacity: 0;
  background: var(--fn-brand);
  will-change: width, opacity;
  transform: translateZ(0);
  transition:
    width 120ms var(--fn-ease),
    opacity 120ms var(--fn-ease);
}

.fn-progress.is-active {
  opacity: 1;
}

/* Indeterminate state: the bar snaps toward 90% and waits. It never
   reverses, so progress only ever moves forward. */
.fn-progress.is-indeterminate {
  transition: width 120ms var(--fn-ease), opacity 120ms var(--fn-ease);
}

/* --------------------------------------------------------------------------
   3. Ring spinner — the single standalone spinner
   -------------------------------------------------------------------------- */

.fn-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  flex: none;
  border: 2px solid rgba(15, 98, 254, 0.22);
  border-top-color: var(--fn-brand);
  border-radius: 50%;
  animation: fn-spin 640ms linear infinite;
}

.fn-spinner--sm {
  width: 14px;
  height: 14px;
  border-width: 2px;
}

.fn-spinner--lg {
  width: 34px;
  height: 34px;
  border-width: 3px;
}

/* --------------------------------------------------------------------------
   4. Dots — inline indicator for buttons, links and rows
   -------------------------------------------------------------------------- */

.fn-dots {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  vertical-align: middle;
  line-height: 0;
}

.fn-dots > i {
  display: block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  animation: fn-breathe 1s var(--fn-ease) infinite;
}

.fn-dots > i:nth-child(2) {
  animation-delay: 0.14s;
}

.fn-dots > i:nth-child(3) {
  animation-delay: 0.28s;
}

.fn-dots--sm > i {
  width: 4px;
  height: 4px;
}

/* --------------------------------------------------------------------------
   5. Skeleton — one placeholder, replacing gh-shim-block / fns-shimmer /
      trivago-shimmer-* / pm-loading rows
   -------------------------------------------------------------------------- */

.fn-skeleton,
.fn-skeleton > .fn-skeleton-line,
.fn-skeleton-line,
/* Legacy alias: the home results grid used its own placeholder class. */
.gh-shim-block {
  background-color: #eef0f3;
  background-image: linear-gradient(
    90deg,
    #eef0f3 0%,
    #f8fafc 50%,
    #eef0f3 100%
  );
  background-size: 200% 100%;
  background-repeat: no-repeat;
  border-radius: var(--fn-radius);
  animation: fn-sweep 0.9s linear infinite;
}

.fn-skeleton-line {
  height: 12px;
  margin-bottom: 8px;
}

.fn-skeleton-line:last-child {
  margin-bottom: 0;
}

.fn-skeleton-chip {
  height: 30px;
  border-radius: 999px;
  margin-bottom: 10px;
}

/* Width helpers */
.fn-w-30 { width: 30%; }
.fn-w-40 { width: 40%; }
.fn-w-50 { width: 50%; }
.fn-w-60 { width: 60%; }
.fn-w-70 { width: 70%; }
.fn-w-80 { width: 80%; }
.fn-w-90 { width: 90%; }
.fn-w-100 { width: 100%; }

/* --------------------------------------------------------------------------
   6. Region — centred inline "Loading…" block for a content area
   -------------------------------------------------------------------------- */

.fn-region {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 28px 16px;
  color: #5f6b7a;
  font-size: 14px;
  text-align: center;
  animation: fn-fade-in var(--fn-dur-base) var(--fn-ease);
}

.fn-region[hidden] {
  display: none;
}

/* --------------------------------------------------------------------------
   7. Overlay — blocking full-screen wait
   -------------------------------------------------------------------------- */

.fn-overlay {
  position: fixed;
  inset: 0;
  z-index: 999998;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--fn-dur-base) var(--fn-ease),
    visibility var(--fn-dur-base) var(--fn-ease);
}

.fn-overlay.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}