/* ============================================================
   RAP Power — mobile app layer.
   Additive only: bottom tab bar, back control, pull-to-refresh,
   action-sheet pickers. Loads after rap.css, before pages.css.
   ============================================================ */

/* ---- Back control ---- */
.back {
  position: fixed;
  z-index: 62;
  top: calc(var(--bar-h) + env(safe-area-inset-top) + 10px);
  left: calc(var(--rail) + 14px);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 9px 15px;
  border: 1px solid color-mix(in oklab, var(--sc-ink) 20%, transparent);
  border-radius: 999px;
  background: color-mix(in oklab, var(--sc-canvas) 84%, transparent);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--sc-ink);
  font: 600 12px/1 var(--sc-font-text);
  letter-spacing: .02em;
  cursor: pointer;
}
.back[hidden] { display: none; }
.back__chev { font-size: 14px; line-height: 1; }

@media (max-width: 1023px) {
  .back {
    top: calc(var(--bar-h) + env(safe-area-inset-top) + 42px);
    left: 14px;
  }
}

/* ---- Bottom tab bar: phones and tablets, where the rail collapses ---- */
.tabs { display: none; }

@media (max-width: 1023px) {
  .tabs {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 70;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    padding-bottom: env(safe-area-inset-bottom);
    border-top: 1px solid color-mix(in oklab, var(--sc-ink) 12%, transparent);
    background: color-mix(in oklab, var(--sc-canvas) 94%, transparent);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
  }
  .tabs a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    min-height: 58px;
    padding: 6px 4px 4px;
    color: var(--sc-ink-soft);
    text-decoration: none;
    font: 600 10px/1 var(--sc-font-mono);
    letter-spacing: .09em;
    text-transform: uppercase;
    -webkit-tap-highlight-color: transparent;
  }
  .tabs svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
  .tabs a.is-active,
  .tabs a[aria-current="page"] { color: var(--sc-ink); }
  .tabs a.is-active svg,
  .tabs a[aria-current="page"] svg { stroke: var(--amber); }
}

/* ---- Pull to refresh ---- */
.ptr {
  position: fixed;
  z-index: 65;
  top: calc(var(--bar-h) + 44px + env(safe-area-inset-top));
  left: 50%;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 14px;
  border: 1px solid color-mix(in oklab, var(--sc-ink) 16%, transparent);
  border-radius: 999px;
  background: color-mix(in oklab, var(--sc-surface) 94%, transparent);
  color: var(--sc-ink-soft);
  font: 600 10px/1 var(--sc-font-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, calc(-60px + var(--pull, 0px)));
  transition: opacity .18s linear;
}
.ptr.is-on { opacity: 1; }
.ptr::before {
  content: "";
  width: 12px;
  height: 12px;
  border: 2px solid color-mix(in oklab, var(--amber) 50%, transparent);
  border-top-color: var(--amber);
  border-radius: 50%;
}
.ptr.is-ready::before { background: var(--amber); }
.ptr.is-busy::before { animation: ptr-spin .7s linear infinite; }
.ptr::after { content: attr(data-label); }
@keyframes ptr-spin { to { transform: rotate(360deg); } }

/* ---- Action-sheet picker ---- */
.field.is-picker { position: relative; }
.pick__native {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  border: 0;
  opacity: 0;
  pointer-events: none;
}
.pick__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  min-height: 50px;
  padding: 0 14px;
  background: color-mix(in oklab, var(--sc-canvas) 60%, transparent);
  border: 1px solid color-mix(in oklab, var(--sc-ink) 22%, transparent);
  border-radius: 3px;
  color: var(--sc-ink);
  font: 400 16px/1.3 var(--sc-font-text);
  text-align: left;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.pick__btn:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}
.pick__value {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pick__btn.is-empty .pick__value { color: var(--sc-ink-soft); }
.pick__chev {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: -4px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  opacity: .6;
}

.sheet {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  align-items: end;
}
.sheet[hidden] { display: none; }
.sheet__veil {
  position: absolute;
  inset: 0;
  background: #04060799;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}
.sheet__panel {
  position: relative;
  display: grid;
  gap: 4px;
  max-height: min(72svh, 540px);
  overflow: auto;
  overscroll-behavior: contain;
  padding: 16px 16px calc(14px + env(safe-area-inset-bottom));
  background: var(--sc-surface);
  border-top: 1px solid color-mix(in oklab, var(--sc-ink) 14%, transparent);
  border-radius: 16px 16px 0 0;
  animation: sheet-up .26s cubic-bezier(.23, 1, .32, 1);
}
.sheet__title {
  margin: 0 0 6px;
  font: 600 10px/1 var(--sc-font-mono);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
}
.sheet__list { display: grid; }
.sheet__opt {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 0 4px;
  background: none;
  border: 0;
  border-bottom: 1px solid color-mix(in oklab, var(--sc-ink) 10%, transparent);
  color: var(--sc-ink);
  font: 500 16px/1.3 var(--sc-font-text);
  text-align: left;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.sheet__opt[aria-selected="true"] { color: var(--amber); }
.sheet__opt:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -2px;
}
.sheet__cancel {
  min-height: 52px;
  margin-top: 10px;
  background: none;
  border: 1px solid color-mix(in oklab, var(--sc-ink) 18%, transparent);
  border-radius: 4px;
  color: var(--sc-ink-soft);
  font: 600 14px/1 var(--sc-font-text);
  cursor: pointer;
}
body.sheet-open { overflow: hidden; }

@media (min-width: 700px) {
  .sheet { align-items: center; justify-items: center; }
  .sheet__panel {
    width: min(430px, 92vw);
    border: 1px solid color-mix(in oklab, var(--sc-ink) 14%, transparent);
    border-radius: 12px;
  }
}

@keyframes sheet-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .sheet__panel { animation: none; }
  .ptr.is-busy::before { animation: none; }
}

/* Header links give way to the bottom tabs on phones and tablets */
@media (max-width: 1023px) {
  .pbar__nav { display: none; }
}

/* ---- Touch-sized controls in the site row editor ---- */
.mrow { grid-template-columns: minmax(0, 1.3fr) minmax(0, .8fr) minmax(0, 1.05fr) 44px; }
.mrow__x { width: 44px; }
@media (max-width: 520px) {
  .mrow { grid-template-columns: 1fr 1fr 44px; }
}

/* The unit select is upgraded to an action sheet inside the row */
.mrow.is-picker { position: relative; }
.mrow.is-picker .pick__btn {
  min-height: 40px;
  padding: 0 10px;
  background: var(--sc-surface);
  border-radius: 3px;
  font: 400 var(--sc-t-sm) var(--sc-font-text);
}

/* ---- Mobile-first layouts: one column, widening on larger screens ---- */
.pool__stage { grid-template-columns: 1fr; }
.inquire__inner { grid-template-columns: 1fr; }
.case { grid-template-columns: 1fr; }

@media (min-width: 1000px) and (min-height: 640px) {
  .pool__stage { grid-template-columns: minmax(0, 1.28fr) minmax(320px, .72fr); }
}
@media (min-width: 900px) {
  .inquire__inner { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); }
}
@media (min-width: 820px) {
  .case { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); }
}

/* ---- Fade between standalone pages: the shell never flashes white ---- */
.pgfade {
  position: fixed;
  inset: 0;
  z-index: 95;
  pointer-events: none;
  background: var(--sc-canvas);
  opacity: 0;
  animation: pgfade-in .22s ease-out forwards;
}
@keyframes pgfade-in { to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .pgfade { animation: none; opacity: 1; }
}