.ui-navstack { display: block; width: 100%; height: 100%; min-height: 0; container-type: inline-size; background: var(--ui-subtle); color: var(--ui-fg); font: 15px/1.5 var(--ui-font); }
.ui-navstack-in { position: relative; width: 100%; height: 100%; overflow: hidden; overscroll-behavior-x: contain; touch-action: pan-y pinch-zoom; }
.ui-navstack-screen {
  position: absolute; inset: 0; display: flex; flex-direction: column; background: var(--ui-bg); transition: transform .3s cubic-bezier(.2, .8, .2, 1);
  animation: ui-navstack-in .3s cubic-bezier(.2, .8, .2, 1);
}
.ui-navstack-screen:dir(rtl) { animation-name: ui-navstack-in-rtl; }
.ui-navstack-screen[data-at="0"], .ui-navstack-quiet .ui-navstack-screen { animation: none; }
@keyframes ui-navstack-in { from { transform: translate3d(100%, 0, 0); } }
@keyframes ui-navstack-in-rtl { from { transform: translate3d(-100%, 0, 0); } }
.ui-navstack-under { visibility: hidden; transform: translate3d(-30%, 0, 0); transition: transform .3s cubic-bezier(.2, .8, .2, 1), visibility 0s .3s; }
.ui-navstack-under:dir(rtl) { transform: translate3d(30%, 0, 0); }
.ui-navstack-gone { transform: translate3d(100%, 0, 0); }
.ui-navstack-gone:dir(rtl) { transform: translate3d(-100%, 0, 0); }
.ui-navstack-moving .ui-navstack-screen { transition: none; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.ui-navstack-moving .ui-navstack-top { box-shadow: var(--ui-shadow-lg); }
.ui-navstack-bar {
  display: flex; flex: none; align-items: center; gap: 2px; box-sizing: border-box; min-height: calc(48px + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) max(8px, env(safe-area-inset-right)) 0 max(4px, env(safe-area-inset-left)); border-bottom: 1px solid var(--ui-border); background: var(--ui-surface);
}
.ui-navstack-title { flex: 1; min-width: 0; margin: 0; padding-inline-start: 8px; overflow: hidden; font-size: 17px; font-weight: 600; outline: none; text-overflow: ellipsis; white-space: nowrap; }
.ui-navstack-back {
  display: inline-flex; flex: 0 1 auto; align-items: center; min-width: 44px; max-width: 45%; height: 44px; padding: 0 8px 0 2px; border: 0; border-radius: var(--ui-radius-sm);
  background: transparent; color: var(--ui-accent); font: inherit; cursor: pointer;
}
.ui-navstack-back span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ui-navstack-back svg { flex: none; width: 26px; height: 26px; }
.ui-navstack-back:dir(rtl) svg { transform: scaleX(-1); }
.ui-navstack-back:focus-visible { outline: none; box-shadow: var(--ui-focus); }
@media (hover: hover) { .ui-navstack-back:hover { background: var(--ui-subtle); } }
/* touch-action on the scroller itself: it stops counting at a scroller. */
.ui-navstack-body { flex: 1; min-height: 0; padding-bottom: env(safe-area-inset-bottom); overflow: auto; overscroll-behavior: contain; touch-action: pan-y pinch-zoom; }
.ui-navstack-empty { display: none; }
@container (min-width: 700px) {
  .ui-navstack-split .ui-navstack-screen { inset-inline-start: 320px; }
  .ui-navstack-split .ui-navstack-screen[data-at="0"] {
    z-index: 1; inset-inline: 0 auto; width: 320px; border-inline-end: 1px solid var(--ui-border); transform: none; visibility: visible; transition: none;
  }
  .ui-navstack-split .ui-navstack-screen[data-at="1"] .ui-navstack-back { display: none; }
  .ui-navstack-split .ui-navstack-empty { position: absolute; inset: 0 0 0 320px; display: grid; place-items: center; color: var(--ui-muted); }
  .ui-navstack-split .ui-navstack-empty:dir(rtl) { inset: 0 320px 0 0; }
}
@media (prefers-reduced-motion: reduce) {
  .ui-navstack-screen, .ui-navstack-under { transition: none; animation: none; }
}


.ui-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  height: 38px; padding: 0 16px; border: 1px solid transparent; border-radius: var(--ui-radius-sm);
  font: 500 14px/1 var(--ui-font); text-decoration: none; white-space: nowrap; cursor: pointer;
  transition: background .15s, border-color .15s, color .15s, box-shadow .15s;
  --b: var(--ui-accent); --bf: var(--ui-accent-fg); --bs: var(--ui-accent-soft);
}
.ui-btn:focus-visible { outline: none; box-shadow: var(--ui-focus); }
.ui-btn[disabled], .ui-btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; pointer-events: none; }
.ui-btn-neutral { --b: var(--ui-fg); --bf: var(--ui-bg); --bs: var(--ui-subtle); }
.ui-btn-danger { --b: var(--ui-danger); --bf: #fff; --bs: var(--ui-danger-soft); }
.ui-btn-solid { background: var(--b); color: var(--bf); }
.ui-btn-solid:hover { background: color-mix(in srgb, var(--b) 88%, var(--ui-fg)); }
.ui-btn-soft { background: var(--bs); color: var(--b); }
.ui-btn-soft:hover { background: color-mix(in srgb, var(--bs) 80%, var(--b)); }
.ui-btn-outline { background: transparent; color: var(--b); border-color: var(--ui-border); }
.ui-btn-outline:hover { border-color: var(--b); background: var(--bs); }
.ui-btn-ghost { background: transparent; color: var(--b); }
.ui-btn-ghost:hover { background: var(--bs); }
.ui-btn-sm { height: 30px; padding: 0 11px; font-size: 13px; }
.ui-btn-lg { height: 46px; padding: 0 22px; font-size: 16px; }
.ui-btn-full { display: flex; width: 100%; }
.ui-btn-spin { width: 1em; height: 1em; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: ui-btn-spin .7s linear infinite; }
@keyframes ui-btn-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .ui-btn-spin { animation-duration: 2s; } }


.ui-navstack-demo-row { display: block; box-sizing: border-box; width: 100%; min-height: 64px; padding: 10px 16px; border: 0; border-bottom: 1px solid var(--ui-border); background: transparent; color: var(--ui-fg); font: 15px/1.4 var(--ui-font); text-align: start; cursor: pointer; }
.ui-navstack-demo-row small { display: block; color: var(--ui-muted); }
.ui-navstack-demo-field { box-sizing: border-box; display: block; width: calc(100% - 24px); height: 44px; margin: 12px; padding: 0 12px; border: 1px solid var(--ui-border); border-radius: var(--ui-radius-sm); background: var(--ui-surface); color: var(--ui-fg); font: 16px var(--ui-font); }