.ui-phone-sign-in {
  position: relative; display: grid; gap: 14px; min-width: 0; color: var(--ui-fg); font: 16px/1.45 var(--ui-font);
  padding-bottom: var(--ui-phone-sign-in-keyboard, 0px); container: ui-phone-sign-in / inline-size;
}
.ui-phone-sign-in h2 { margin: 0; font-size: 22px; line-height: 1.25; outline: none; }
.ui-phone-sign-in-lead { margin: -8px 0 0; color: var(--ui-muted); overflow-wrap: anywhere; }
.ui-phone-sign-in-form { display: grid; gap: 12px; min-width: 0; margin: 0; }
.ui-phone-sign-in-field { display: grid; gap: 4px; min-width: 0; }
.ui-phone-sign-in-field label { font-size: 14px; font-weight: 500; }
/* 16 px at least: iOS zooms the page into a smaller field. */
.ui-phone-sign-in-field select, .ui-phone-sign-in-num input, .ui-phone-sign-in-code {
  box-sizing: border-box; width: 100%; min-width: 0; height: 50px; margin: 0; padding: 0 12px; border: 1px solid var(--ui-border); border-radius: var(--ui-radius-sm);
  background: var(--ui-surface); color: var(--ui-fg); font: 17px var(--ui-font); font-variant-numeric: tabular-nums;
}
.ui-phone-sign-in-field select:focus, .ui-phone-sign-in-num:focus-within, .ui-phone-sign-in-code:focus { outline: none; border-color: var(--ui-accent); box-shadow: var(--ui-focus); }
.ui-phone-sign-in-num { display: flex; align-items: center; min-width: 0; border: 1px solid var(--ui-border); border-radius: var(--ui-radius-sm); background: var(--ui-surface); }
.ui-phone-sign-in-num span { flex: none; padding-inline-start: 12px; color: var(--ui-muted); font-size: 17px; font-variant-numeric: tabular-nums; }
.ui-phone-sign-in-num input { flex: 1; border: 0; background: transparent; padding-inline-start: 8px; outline: none; box-shadow: none; }
.ui-phone-sign-in-bad .ui-phone-sign-in-num, .ui-phone-sign-in-bad .ui-phone-sign-in-code { border-color: var(--ui-danger); }
.ui-phone-sign-in-code { height: 60px; text-align: center; font: 600 26px var(--ui-mono); letter-spacing: .32em; text-indent: .32em; caret-color: var(--ui-accent); }
.ui-phone-sign-in-note, .ui-phone-sign-in-wait { margin: 0; color: var(--ui-muted); font-size: 14px; }
.ui-phone-sign-in-note a { display: inline-flex; align-items: center; min-height: 44px; min-width: 44px; color: var(--ui-accent); }
.ui-phone-sign-in-off { margin: 0; padding: 8px 12px; border-radius: var(--ui-radius-sm); background: var(--ui-warning-soft); color: var(--ui-warning); font-size: 14px; }
.ui-phone-sign-in-error { margin: 0; color: var(--ui-danger); font-size: 14px; }
.ui-phone-sign-in-more { display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: center; justify-content: space-between; }
.ui-phone-sign-in-done { display: grid; justify-items: center; gap: 8px; padding: 24px 0; text-align: center; }
.ui-phone-sign-in-tick { display: grid; place-items: center; width: 64px; height: 64px; border-radius: 50%; background: var(--ui-success-soft); color: var(--ui-success); }
.ui-phone-sign-in-tick svg { width: 32px; height: 32px; }
.ui-phone-sign-in-pair { display: grid; gap: 12px; min-width: 0; }
/* A tablet: the country beside the number, in a form of a readable width and not one across the screen. */
@container ui-phone-sign-in (min-width: 560px) {
  .ui-phone-sign-in-form, .ui-phone-sign-in-done { width: 100%; max-width: 480px; margin-inline: auto; }
  .ui-phone-sign-in-pair { grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); }
}


.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; } }