.reference-ui .login-overlay { isolation: isolate; }
.reference-ui .login-sheet { position: relative; z-index: 1; }
.reference-ui .login-overlay { padding: 0; }
.reference-ui .login-sheet { min-height: 100dvh; max-height: 100dvh; border-radius: 0; padding: 20px 24px 32px; }
.reference-ui .login-visual { display: block; position: static; width: 100%; height: 160px; opacity: .65; background: url("/assets/caixiaocha/buildings/building-library-tall.webp") center / contain no-repeat; margin: 0 0 16px; }
.reference-ui .login-sheet .sheet-heading { justify-content: center; text-align: center; }
.reference-ui .login-sheet .sheet-heading h2 { font-size: 30px; }
.reference-ui .login-sheet form { gap: 20px; }
.reference-ui .login-sheet label > span { font-size: 16px; }
.reference-ui .login-sheet input:not([type=checkbox]) { background: transparent; border: 1px solid #a9bbc9; min-height: 48px; padding: 12px; }
.reference-ui .login-sheet .sheet-intro { font-size: 14px; line-height: 1.5; }
.reference-ui .login-sheet .consent-check {
  grid-template-columns: 20px minmax(0, 1fr);
  color: #42586d;
  font-size: 13px;
  line-height: 1.55;
}
.reference-ui .login-sheet .consent-check span { font-size: inherit; }
.reference-ui .login-sheet .primary-button:disabled {
  color: #365b78;
  background: #e4eef7;
  border-color: #bfd2e3;
  opacity: 1;
}
.reference-ui .login-install-button { font-size: 16px; font-weight: 400; color: var(--gemini-blue); }
.reference-ui .login-sheet .login-heading-copy {
  display: grid;
  justify-items: center;
  gap: 0;
}
.reference-ui .login-sheet .login-heading-copy .paper-brand {
  gap: 14px;
}
.reference-ui .login-sheet .login-heading-copy .paper-brand-mark {
  width: 52px;
  height: 52px;
  flex-basis: 52px;
}
.reference-ui .login-sheet .login-heading-copy .paper-brand strong {
  font-size: 42px;
  letter-spacing: -0.035em;
}
.reference-ui .login-sheet .login-heading-copy .login-brand-title {
  margin: 0;
  color: var(--gemini-ink);
  line-height: 1;
}
.reference-ui .login-sheet .login-tagline {
  margin: 12px 0 0;
  color: var(--gemini-muted);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.45;
}
.reference-ui .login-sheet .sheet-heading {
  min-height: 0;
  margin: 10px 0 14px;
  padding: 0 0 12px;
  align-items: center;
}
.reference-ui .login-sheet .sheet-intro {
  width: 100%;
  min-height: 0;
  margin: 0 0 24px;
  font-size: 14px;
  line-height: 1.6;
}
/* Login study: quiet paper, supplied campus drawing and new brand symbol. */
.reference-ui .login-sheet {
  background: #faf9f6;
  isolation: isolate;
  overflow-y: auto;
  overflow-x: hidden;
  padding: clamp(230px, 35dvh, 300px) 28px max(28px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
}
.reference-ui .login-sheet .login-visual {
  position: absolute;
  inset: 0 0 auto;
  height: clamp(410px, 65dvh, 580px);
  width: 100%;
  margin: 0;
  pointer-events: none;
  z-index: -1;
  opacity: .55;
  background: url('/assets/login/campus-lines-f34171eb8f03.png') right top / 100% auto no-repeat;
  mix-blend-mode: multiply;
  mask-image: linear-gradient(to bottom, #000 0%, #000 48%, rgba(0,0,0,.55) 73%, transparent 100%);
}
.reference-ui .login-sheet .sheet-heading {
  justify-content: flex-start;
  text-align: left;
  width: 100%;
  max-width: 400px;
  margin: 0 auto 44px;
  padding: 0;
}
.reference-ui .login-sheet .login-heading-copy { justify-items: start; }
.reference-ui .login-sheet .login-new-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: 'Noto Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;
  font-size: clamp(38px, 10vw, 46px);
  font-weight: 500;
  letter-spacing: .055em;
  line-height: 1.25;
  color: #192d3c;
}
.reference-ui .login-new-symbol { width: 48px; height: 48px; flex: 0 0 48px; mix-blend-mode: multiply; }
.reference-ui .login-sheet .sheet-heading .login-new-brand > span {
  font: inherit;
  color: inherit;
  letter-spacing: inherit;
}
.reference-ui .login-sheet .login-tagline { margin: 15px 0 0 64px; font-size: 15px; color: #65798b; letter-spacing: .035em; }
.reference-ui .login-sheet form { width: 100%; max-width: 400px; margin-inline: auto; gap: 26px; }
.reference-ui .login-sheet form > label:not(.consent-check) { gap: 6px; }
.reference-ui .login-sheet label > span { font-size: 14px; color: #63778a; }
.reference-ui .login-sheet input:not([type=checkbox]) {
  width: 100%;
  min-height: 56px;
  border: 0;
  border-bottom: 1px solid #cdd7df;
  border-radius: 0;
  padding: 12px 0;
  font-size: 17px;
  box-shadow: none;
  color: #213747;
  transition: border-color .18s ease;
}
.reference-ui .login-sheet input::placeholder { color: #8494a2; opacity: 1; }
.reference-ui .login-sheet input:not([type=checkbox]):focus { outline: none; border-bottom-color: #216da2; box-shadow: 0 1px 0 #216da2; }
.reference-ui .login-password-control { position: relative; }
.reference-ui .login-sheet .login-password-control input { padding-right: 48px; }
.reference-ui .login-sheet .login-password-toggle {
  position: absolute; right: 0; top: 6px; width: 44px; height: 44px;
  padding: 11px; border: 0; background: transparent; color: #748a9a;
}
.reference-ui .login-password-toggle svg { display: block; width: 22px; height: 22px; }
.reference-ui .login-sheet .consent-check { margin: 0; gap: 10px; align-items: start; font-size: 13px; line-height: 1.7; }
.reference-ui .login-sheet .consent-check input { margin-top: 3px; width: 18px; height: 18px; accent-color: #24659a; }
.reference-ui .login-sheet .consent-check span { color: #5c7082; font-size: inherit; }
.reference-ui .login-sheet .login-privacy-link { display: inline; padding: 0; min-height: 0; border: 0; border-radius: 0; background: none; color: #235a81; font: inherit; text-decoration: underline; text-underline-offset: 3px; }
.reference-ui .login-privacy-note { margin-top: -12px; font-size: 13px; line-height: 1.7; color: #526a7d; }
.reference-ui .login-sheet .primary-button {
  position: relative; min-height: 52px; border-radius: 10px; border: 1px solid #6993b1;
  background: rgba(229, 240, 247, .62); color: #235e88; font-size: 17px; font-weight: 500;
  padding-inline: 48px;
  display: flex; align-items: center; justify-content: center; gap: 18px;
  transition: background .2s ease, transform .2s ease;
}
.reference-ui .login-sheet .primary-button > span { position: absolute; right: 20px; }
.reference-ui .login-sheet .primary-button:disabled { background: rgba(250, 249, 246, .72); border-color: #c4cfd7; color: #718594; opacity: 1; }
.reference-ui .login-sheet .primary-button:not(:disabled):hover { background: #e2eef5; border-color: #3a779f; }
.reference-ui .login-sheet .primary-button[aria-busy=true] { color: #235e88; border-color: #6993b1; background: rgba(229, 240, 247, .62); }
.reference-ui .login-sheet .login-button-spinner { width: 16px; height: 16px; border: 1.5px solid #b6cddc; border-top-color: #235e88; border-radius: 50%; animation: login-button-spin .8s linear infinite; }
@keyframes login-button-spin { to { transform: rotate(360deg); } }
.reference-ui .login-sheet .primary-button:not(:disabled):active { transform: translateY(1px); }
.reference-ui .login-sheet .login-install-button { font-size: 14px; color: #5f7688; margin-top: -8px; padding: 10px; }
.reference-ui .login-sheet button:focus-visible { outline: 2px solid #216797; outline-offset: 4px; }
@media(max-height: 680px) {
  .reference-ui .login-sheet { padding-top: 190px; }
  .reference-ui .login-sheet .sheet-heading { margin-bottom: 28px; }
  .reference-ui .login-sheet form { gap: 20px; }
}
@media(min-width: 700px) {
  .reference-ui .login-overlay { background: #eeefed; padding: 24px; }
  .reference-ui .login-sheet { min-height: min(840px, calc(100dvh - 48px)); max-height: calc(100dvh - 48px); border: 1px solid #e0e2df; border-radius: 28px; }
}
@media(prefers-reduced-motion: reduce) {
  .reference-ui .login-sheet :is(input, button) { transition: none; }
  .reference-ui .login-sheet .login-button-spinner { animation: none; }
}