.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-pgsel { display: flex; flex-direction: column; height: var(--ui-pgsel-height, 100dvh); min-width: 0; container: ui-pgsel / inline-size; background: var(--ui-bg); color: var(--ui-fg); font: 14px/1.35 var(--ui-font); }
.ui-pgsel-bar { flex: none; display: flex; align-items: center; gap: 6px; min-height: 52px; padding: 2px max(6px, env(safe-area-inset-right, 0px)) 2px max(14px, env(safe-area-inset-left, 0px)); border-bottom: 1px solid var(--ui-border); }
.ui-pgsel-count { flex: 1; min-width: 0; margin: 0; font-size: 16px; font-weight: 650; font-variant-numeric: tabular-nums; }
.ui-pgsel-btn { min-height: 44px; min-width: 44px; padding: 0 12px; border: 0; border-radius: 10px; background: none; color: var(--ui-accent); font: 600 14px var(--ui-font); cursor: pointer; touch-action: manipulation; }
.ui-pgsel-btn:focus-visible { outline: none; box-shadow: var(--ui-focus); }
.ui-pgsel-scroll { position: relative; flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; outline: none; }
.ui-pgsel-month { position: sticky; top: 0; z-index: 1; display: flex; align-items: center; justify-content: space-between; min-height: 44px; padding: 0 6px 0 14px; background: var(--ui-bg); }
.ui-pgsel-month h3 { margin: 0; font-size: 15px; font-weight: 650; }
.ui-pgsel-section { content-visibility: auto; contain-intrinsic-size: auto 480px; }
.ui-pgsel-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(92px, 1fr)); gap: 2px; }
/* Up and down stay the browser's; sideways is the run across photos. Nothing here selects text or opens a callout. */
.ui-pgsel-cell {
  position: relative; display: block; aspect-ratio: 1; width: 100%; padding: 0; overflow: hidden; border: 0; background: var(--ui-subtle); cursor: pointer; touch-action: pan-y;
  user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; -webkit-tap-highlight-color: transparent;
}
.ui-pgsel-cell img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .12s; pointer-events: none; -webkit-user-drag: none; }
.ui-pgsel-cell:focus-visible { outline: 3px solid var(--ui-accent); outline-offset: -3px; z-index: 1; }
.ui-pgsel-tick { position: absolute; top: 6px; right: 6px; display: none; width: 22px; height: 22px; border: 2px solid #fff; border-radius: 50%; background: rgba(0, 0, 0, .25); box-sizing: border-box; pointer-events: none; }
.ui-pgsel-picking .ui-pgsel-tick { display: block; }
.ui-pgsel-on .ui-pgsel-tick { background: var(--ui-accent); }
.ui-pgsel-on .ui-pgsel-tick::after { content: ""; position: absolute; left: 5px; top: 1px; width: 5px; height: 10px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.ui-pgsel-on img { transform: scale(.86); }
.ui-pgsel-on { background: var(--ui-accent-soft); }
.ui-pgsel-empty { margin: 0; padding: 40px 16px; text-align: center; color: var(--ui-muted); }
/* Wide: the months keep a column of their own, and the photos have more room. */
@container ui-pgsel (min-width: 640px) {
  .ui-pgsel-section { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 8px; padding: 6px 8px; }
  .ui-pgsel-month { flex-direction: column; align-items: flex-start; justify-content: flex-start; align-self: start; top: 6px; padding: 6px 0 6px 8px; }
  .ui-pgsel-grid { grid-template-columns: repeat(auto-fill, minmax(124px, 1fr)); gap: 4px; }
  .ui-pgsel-cell { border-radius: 6px; }
}
@media (prefers-reduced-motion: reduce) { .ui-pgsel-cell img { transition: none; } }