/* Login-only logo-derived spiral / frosted glass. Contract: logo-spiral-glass-ui.md.
   All controls, authentication states and handlers remain the original ones. */
body.silver-blue-theme.account-login.login-poster {
  position: relative;
  isolation: isolate;
  background: #050509 !important;
  color: #f4f5fa !important;
}
body.login-poster.account-login::before { content: none; }
body.login-poster .poster-atmosphere {
  position: fixed;
  z-index: -1;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  background-color: #050509;
  background-image: url("/logo-spiral-background-v1.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
body.login-poster .poster-atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, #05050908, transparent 50%, #0505090d),
    linear-gradient(180deg, transparent 76%, #05050930);
}
body.login-poster .poster-atmosphere * { pointer-events: none; }
body.login-poster :is(.poster-orbit, .poster-sheen) { display: none; }
body.silver-blue-theme.login-poster .login-shell {
  box-sizing: border-box;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(400px, 430px);
  align-items: center;
  gap: clamp(64px, 7vw, 112px);
  width: min(1320px, calc(100% - 112px));
  min-height: 100svh;
  margin: 0 auto;
  padding: 48px 0 36px;
}
body.login-poster .poster-brand {
  align-self: start;
  min-width: 0;
  padding-top: 8px;
}
body.silver-blue-theme.login-poster .login-brand.product-brand {
  position: relative;
  left: min(0px, calc(716px - 50vw));
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 24px;
  margin: 0;
}
body.silver-blue-theme.login-poster .login-brand .product-logo {
  width: 112px;
  height: 112px;
  border: 0;
  border-radius: 0;
  padding: 0;
  background: transparent;
  object-fit: contain;
  filter: none;
}
body.login-poster .product-brand-copy { position: relative; isolation: isolate; gap: 10px; min-width: 0; }
body.login-poster .product-brand-copy::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -18px -28px;
  pointer-events: none;
  background: radial-gradient(ellipse at center, #0505099e 26%, #05050952 52%, #05050900 78%);
}
body.silver-blue-theme.login-poster .login-brand .product-brand-copy strong {
  color: #f4f5fa !important;
  font-size: clamp(40px, 3.3vw, 48px);
  line-height: 1.2;
  letter-spacing: .04em;
  font-weight: 600;
  text-shadow: 0 2px 24px #050509b3;
}
body.silver-blue-theme.login-poster .login-brand .product-brand-copy span {
  color: #d0d5e0 !important;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: .02em;
  font-weight: 400;
  text-shadow: 0 2px 18px #050509;
}
body.login-poster .brand-name { display: flex; align-items: baseline; gap: 14px; }
body.login-poster .brand-description { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
body.silver-blue-theme.login-poster .login-brand .product-brand-copy .brand-name-zh {
  font-size: 16px;
  letter-spacing: .10em;
  line-height: 1.4;
  white-space: nowrap;
}
body.silver-blue-theme.login-poster .login-brand .product-brand-copy .brand-description-zh {
  font-size: 12px;
  letter-spacing: .16em;
  line-height: 1.4;
}
body.login-poster .poster-slogan {
  position: relative;
  width: fit-content;
  max-width: 100%;
  margin: clamp(190px, 27svh, 280px) 0 0 clamp(16px, 2vw, 32px);
  color: #f4f5fa;
  font-size: clamp(62px, 5.25vw, 76px);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -.045em;
  text-shadow: 0 2px 20px #050509, 0 0 40px #050509;
}
body.login-poster .poster-slogan span { display: block; }
body.login-poster .poster-slogan .poster-slogan-en { font-family: Arial,"Segoe UI",sans-serif; }
body.login-poster .poster-slogan .poster-slogan-zh {
  margin-top: 24px;
  color: #d0d5e0;
  font-size: clamp(17px,1.3vw,19px);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: .12em;
}
body.login-poster .poster-access { position: relative; min-width: 0; }
body.login-poster .poster-access::before { content: none; }
body.silver-blue-theme.login-poster .login-card {
  position: relative;
  padding: 30px;
  border: 1px solid rgba(230,236,255,.56);
  border-radius: 29px;
  background: #171820;
  box-shadow: inset 0 1px 0 #f5edff45, inset 1px 0 0 #a99aef1a,
    0 20px 70px #0000004d;
}
/* Soft internal reflections stay clipped to the rounded glass itself. They
   remain below all text and controls, without a second blur surface. */
body.silver-blue-theme.login-poster .login-card:not(.admin-entry) { isolation: isolate; }
body.silver-blue-theme.login-poster .login-card:not(.admin-entry)::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(ellipse 84% 46% at 0% 0%, #aab8e247, transparent 86%),
    radial-gradient(ellipse 64% 44% at 100% 63%, #a260cf47, transparent 86%),
    radial-gradient(ellipse 90% 40% at 18% 100%, #539fea3d, transparent 88%);
}
/* One filtered surface; inputs and buttons do not add their own blur layers. */
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  body.silver-blue-theme.login-poster .login-card:not(.admin-entry) {
    background: linear-gradient(145deg, #d6e2ff16, transparent 38%, #b69ce110 100%), rgba(12,14,20,.40);
    -webkit-backdrop-filter: blur(22px) saturate(120%);
    backdrop-filter: blur(22px) saturate(120%);
  }
}
body.silver-blue-theme.login-poster .login-card h1 {
  color: #f4f5fa;
  font-size: 36px;
  line-height: 1.1;
  margin-bottom: 22px;
  font-weight: 600;
  letter-spacing: -.025em;
}
body.silver-blue-theme.login-poster .login-card .login-title-zh {
  display: block;
  margin-top: 9px;
  color: #ccd2df;
  font-size: 13px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: .08em;
}
body.silver-blue-theme.login-poster .login-caption { color: #bfc9db; font-size: 12px; font-weight: 400; letter-spacing: .02em; }
body.silver-blue-theme.login-poster .login-card label > .login-caption { margin-left: 10px; }
body.silver-blue-theme.login-poster .login-intro { margin-bottom: 20px; color: #ccd2df; }
body.silver-blue-theme.login-poster .login-methods {
  display: flex;
  align-items: center;
  gap: 24px;
  margin: 8px 0 20px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}
body.silver-blue-theme.account-login.login-poster .login-methods :is(button, button:hover, button:active, button:disabled, button[aria-pressed]) {
  position: relative;
  flex: none;
  width: auto;
  min-height: 54px;
  margin: 0;
  padding: 8px 0 12px;
  border: 0 !important;
  border-radius: 0;
  background: transparent !important;
  box-shadow: none !important;
  color: #b6becf !important;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}
body.silver-blue-theme.login-poster .login-methods button > span { display: block; text-align: left; line-height: 1.3; }
body.silver-blue-theme.login-poster .login-methods button > .login-caption { margin-top: 4px; font-size: 11px; }
body.silver-blue-theme.login-poster .login-methods button[aria-pressed="true"] {
  color: #edf3ff !important;
}
body.silver-blue-theme.account-login.login-poster .login-methods button[aria-pressed="true"] { color: #edf3ff !important; }
body.silver-blue-theme.login-poster .login-methods button[aria-pressed="true"]::after {
  content: "";
  position: absolute;
  height: 2px;
  inset: auto 0 0;
  border-radius: 2px;
  background: #c4ddff;
  pointer-events: none;
}
body.silver-blue-theme.account-login.login-poster .login-methods button:disabled { color: #929eb2 !important; }
body.silver-blue-theme.login-poster .login-methods small { position: absolute; left: calc(100% + 6px); bottom: 12px; margin: 0; font-size: 10px; font-weight: 400; }
body.silver-blue-theme.login-poster .login-card label { color: #ccd2df !important; }
body.silver-blue-theme.login-poster .login-card input {
  min-height: 46px;
  padding: 11px 13px;
  border-radius: 13px;
  background: rgba(5,7,13,.60) !important;
  border-color: rgba(230,236,255,.38) !important;
  color: #f4f5fa !important;
}
body.silver-blue-theme.login-poster .login-card input::placeholder { color: #aeb8ca; }
body.silver-blue-theme.login-poster .login-card input[type=checkbox] { min-height: 16px; padding: 0; border-radius: 4px; }
body.silver-blue-theme.login-poster .login-card :is(#accountLoginSubmit, #smsLoginSubmit) {
  min-height: 56px;
  margin-top: 24px;
  border-radius: 13px;
  background: linear-gradient(115deg, #8aaaff12, transparent 42%, #d98ec512), rgba(23,25,34,.84) !important;
  border-color: rgba(230,236,255,.56) !important;
  color: #f4f5fa !important;
  box-shadow: inset 0 1px #ffffff12, 0 4px 14px #00000024 !important;
  font-weight: 600;
}
body.silver-blue-theme.login-poster .login-card :is(#accountLoginSubmit,#smsLoginSubmit) > span { display: block; line-height: 1.4; }
body.silver-blue-theme.login-poster .login-card :is(#accountLoginSubmit,#smsLoginSubmit) > [lang=en] { font-size: 13px; letter-spacing: .045em; }
body.silver-blue-theme.login-poster .login-card :is(#accountLoginSubmit,#smsLoginSubmit) > .login-caption { margin-top: 3px; font-size: 11px; }
body.silver-blue-theme.login-poster :is(#accountLoginCancel,.login-help > summary) > .login-caption { margin-left: 9px; }
body.silver-blue-theme.login-poster .login-card :is(#accountLoginSubmit, #smsLoginSubmit):hover:not(:disabled) {
  background: linear-gradient(115deg, #8aaaff22, transparent 42%, #d98ec51c), #242633 !important;
  border-color: #e6ecffbd !important;
}
body.silver-blue-theme.login-poster .login-card :is(#accountLoginSubmit, #smsLoginSubmit):disabled {
  background: #11131cd9 !important;
  border-color: #e6ecff30 !important;
  color: #aeb8ca !important;
  box-shadow: none !important;
}
body.silver-blue-theme.login-poster .login-card .login-secondary {
  border-radius: 13px;
  border-color: #e6ecff42 !important;
  background: #0a0c145c !important;
}
body.silver-blue-theme.login-poster .sms-code-row { display: flex; align-items: stretch; gap: 10px; min-width: 0; }
body.silver-blue-theme.login-poster .sms-code-row input { flex: 1; width: 0; min-width: 0; }
body.silver-blue-theme.login-poster .sms-code-row #smsSend {
  flex: none;
  width: 116px;
  min-height: 46px;
  margin: 0;
  padding: 8px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}
body.silver-blue-theme.login-poster :is(.login-hint, #accountLoginMessage, .device-details, #adminEntryStatus) { color: #aeb8ca; }
body.silver-blue-theme.login-poster #accountLoginMessage.account-error { color: #ffb5bc !important; }
body.silver-blue-theme.login-poster .device-details { margin-top: 18px; padding-top: 8px; }
body.silver-blue-theme.login-poster .device-details summary,
body.silver-blue-theme.login-poster .admin-entry summary { min-height: 44px; padding: 10px 0; box-sizing: border-box; color: #ccd2df !important; }
body.silver-blue-theme.login-poster .owner-member-choice { min-height: 44px; }
body.silver-blue-theme.login-poster .admin-entry-button { box-sizing: border-box; min-height: 44px; border-radius: 13px; }
body.silver-blue-theme.login-poster .admin-entry {
  margin-top: 12px;
  padding: 8px 22px;
  border-color: #e6ecff30 !important;
  border-radius: 18px;
  background: #101119e6;
  box-shadow: inset 0 1px #ffffff0c;
}
body.silver-blue-theme.login-poster .admin-entry p { margin: 12px 0; color: #ccd2df; }
body.silver-blue-theme.login-poster .login-footer {
  margin: 12px 6px 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(5,5,9,.86);
  color: #c5cdda;
  text-shadow: 0 1px 8px #050509;
}
body.silver-blue-theme.login-poster #accountLoginMessage { overflow-wrap: anywhere; white-space: pre-line; }
body.silver-blue-theme.login-poster .sms-code-row #smsSend { white-space: pre-line; line-height: 1.35; }
body.silver-blue-theme.login-poster #accountLoginMessage:empty { min-height: 0; margin: 0; }
body.silver-blue-theme.login-poster .login-help { margin-top: 24px; border-top: 1px solid #e6ecff26; padding-top: 6px; font-size: 12px; color: #b6c0d2; }
body.silver-blue-theme.login-poster .login-help summary { box-sizing: border-box; min-height: 44px; padding: 11px 0; cursor: pointer; }
body.silver-blue-theme.login-poster .login-help p { margin: 10px 0; overflow-wrap: anywhere; }
body.silver-blue-theme.login-poster .login-help :is(.device-details, .admin-entry, .member-compatibility) {
  margin-top: 6px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}
body.silver-blue-theme.login-poster .login-help .owner-member-choice { margin: 0; }
body.silver-blue-theme.login-poster [hidden] { display: none !important; }
@media (min-width: 901px) and (max-width: 1100px) {
  body.silver-blue-theme.login-poster .login-shell { width: calc(100% - 80px); grid-template-columns: minmax(0, 1fr) 400px; gap: 40px; }
  body.silver-blue-theme.login-poster .login-brand.product-brand { gap: 16px; }
  body.silver-blue-theme.login-poster .login-brand .product-brand-copy strong { font-size: 36px; }
  body.silver-blue-theme.login-poster .login-brand .product-brand-copy span { font-size: 14px; }
  body.silver-blue-theme.login-poster .login-brand .product-logo { width: 96px; height: 96px; }
  body.login-poster .poster-slogan { margin-left: 0; max-width: 100%; font-size: clamp(46px,5vw,55px); }
}
@media (max-width: 900px) {
  body.silver-blue-theme.login-poster .login-shell {
    display: block;
    width: min(480px, calc(100% - 40px));
    min-height: 100svh;
    padding: 24px 0 32px;
  }
  body.login-poster .poster-brand { padding: 0; margin-bottom: 24px; }
  body.silver-blue-theme.login-poster .login-brand.product-brand { gap: 20px; }
  body.silver-blue-theme.login-poster .login-brand.product-brand { left: 0; }
  body.silver-blue-theme.login-poster .login-brand .product-logo { width: 84px; height: 84px; }
  body.login-poster .product-brand-copy { gap: 8px; }
  body.silver-blue-theme.login-poster .login-brand .product-brand-copy strong { font-size: 34px; letter-spacing: .04em; }
  body.silver-blue-theme.login-poster .login-brand .product-brand-copy span { font-size: 12px; letter-spacing: .01em; }
  body.login-poster .product-brand-copy { gap: 6px; }
  body.login-poster .product-brand-copy::before { inset: -12px -10px; }
  body.login-poster .brand-name { gap: 10px; }
  body.silver-blue-theme.login-poster .login-brand .product-brand-copy .brand-name-zh { font-size: 14px; letter-spacing: .06em; }
  body.silver-blue-theme.login-poster .login-brand .product-brand-copy .brand-description-zh { font-size: 11px; letter-spacing: .12em; }
  body.login-poster .poster-slogan { margin: 16px 0 0; max-width: 100%; font-size: 32px; line-height: 1.05; }
  body.login-poster .poster-slogan .poster-slogan-zh { margin-top: 12px; font-size: 13px; letter-spacing: .07em; }
  body.silver-blue-theme.login-poster .login-card { border-radius: 22px; padding: 24px; }
  body.silver-blue-theme.login-poster .login-card h1 { font-size: 30px; }
  body.silver-blue-theme.login-poster .login-card .login-title-zh { font-size: 12px; }
  body.silver-blue-theme.login-poster .admin-entry { padding: 8px 20px; border-radius: 16px; }
  body.login-poster .poster-atmosphere { background-position: 26% center; }
  body.login-poster .poster-atmosphere::after { background: linear-gradient(180deg, #05050966, #05050922 32%, #05050966); }
}
@media (max-width: 360px) {
  body.silver-blue-theme.login-poster .login-shell { width: calc(100% - 32px); padding-top: 24px; }
  body.silver-blue-theme.login-poster .login-card { padding: 20px; }
  body.silver-blue-theme.login-poster .login-brand.product-brand { gap: 16px; }
  body.silver-blue-theme.login-poster .login-brand .product-logo { width: 80px; height: 80px; }
  body.silver-blue-theme.login-poster .login-brand .product-brand-copy strong { font-size: 32px; }
}
/* User explicitly selected visible glass for the login poster. Its single
   blur surface stays enabled without changing the host's system preference.
   Workspace reduction and no-filter fallback retain their existing behavior. */
@media (prefers-reduced-motion: reduce) {
  body.login-poster *, body.login-poster *::before, body.login-poster *::after { animation: none !important; transition: none !important; }
}