.signin-page {
  --signin-accent: #0d629f;
  --signin-accent-hover: #095182;
  --signin-art-surface: #ffffff;
  --signin-art-line: #d3dfeb;
  --signin-result-active-ink: var(--brand);
  --signin-animation-duration: 4.8s;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100dvh;
  background: var(--canvas);
}

.signin-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 32px;
}

.signin-service { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 11px; font-weight: 600; }
.signin-service > span { width: 6px; height: 6px; border-radius: 50%; background: var(--signin-accent); }
.signin-theme .theme-preference.compact { position: static; width: auto; }
.signin-theme .theme-preference-label { display: none; }
.signin-theme .theme-options { background: var(--surface); }
.signin-theme .theme-options button { display: flex; align-items: center; justify-content: center; gap: 6px; min-width: 65px; min-height: 30px; padding: 5px 9px; font-size: 10px; }
.signin-theme .theme-options button.active { background: var(--surface-soft); box-shadow: none; }

.signin-main { display: grid; place-items: center; min-width: 0; padding: 24px 20px 36px; }
.signin-card { width: min(420px, 100%); padding: 28px 32px 0; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); box-shadow: 0 16px 50px rgba(30, 53, 76, .055); }
.signin-brand { display: flex; align-items: center; justify-content: center; gap: 12px; width: fit-content; margin: 0 auto; color: var(--ink); text-decoration: none; }
.signin-brand img { display: block; width: 44px; height: 44px; object-fit: contain; }
.signin-brand > span { display: grid; gap: 3px; }
.signin-brand strong { font-size: 19px; font-weight: 750; letter-spacing: -.04em; }
.signin-brand small { color: var(--muted); font-size: 11px; font-weight: 550; }

.signin-illustration { margin: 26px -8px 24px; }
.link-illustration { display: block; width: 100%; height: auto; overflow: visible; }
.link-art-guide { stroke: var(--signin-art-line); stroke-width: 1.4; }
.link-art-surface { fill: var(--signin-art-surface); stroke: var(--signin-art-line); }
.link-art-muted { color: var(--muted); fill: currentColor; }
g.link-art-muted { fill: none; }
.link-art-url { font: 9px var(--mono); }
.link-art-halo { fill: var(--brand-soft); }
.link-art-processor { fill: var(--signin-accent); }
.link-art-chain { color: #ffffff; }
.link-art-packet { fill: var(--signin-accent); opacity: 0; }
.link-art-packet-in { animation: link-packet-in var(--signin-animation-duration) ease-in-out infinite; }
.link-art-packet-out { animation: link-packet-out var(--signin-animation-duration) ease-in-out infinite; }
.link-art-chain { transform-box: fill-box; transform-origin: center; animation: link-join var(--signin-animation-duration) ease-in-out infinite; }
.link-art-result { color: var(--signin-result-active-ink); animation: link-result var(--signin-animation-duration) linear infinite; }
.link-art-result-surface { fill: var(--brand-soft); stroke: var(--signin-result-active-ink); animation: link-result-surface var(--signin-animation-duration) linear infinite; }
.link-art-result-trace { fill: none; stroke: var(--signin-result-active-ink); stroke-width: 1.8; stroke-linecap: round; stroke-dasharray: 100; stroke-dashoffset: 100; opacity: 0; pointer-events: none; animation: link-result-trace var(--signin-animation-duration) linear infinite; }
.link-art-short-url { fill: currentColor; font: 650 11px var(--mono); }
.link-art-result-icon { color: inherit; }
.link-art-result-check { animation: link-result-check var(--signin-animation-duration) linear infinite; }
.signin-illustration figcaption { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 6px; color: var(--muted); font-size: 10px; }
.signin-motion-toggle { display: grid; place-items: center; width: 24px; height: 24px; padding: 0; border: 1px solid transparent; border-radius: 5px; background: transparent; color: var(--muted); cursor: pointer; font-size: 8px; }
.signin-motion-toggle:hover { border-color: var(--line); background: var(--surface-soft); color: var(--ink); }
.animation-paused .link-illustration * { animation-play-state: paused; }

.signin-heading { text-align: center; }
.signin-heading h1 { margin: 0; color: var(--ink); font-size: 28px; font-weight: 730; letter-spacing: -.045em; line-height: 1.15; }
.signin-heading p { max-width: 290px; margin: 10px auto 23px; color: var(--ink-soft); font-size: 12px; line-height: 1.7; text-wrap: pretty; }
.signin-sso { display: flex; align-items: center; gap: 12px; min-height: 46px; padding: 0 15px; border: 1px solid var(--signin-accent); border-radius: 8px; background: var(--signin-accent); color: #ffffff; font-size: 12px; font-weight: 650; text-decoration: none; transition: background-color .2s ease, border-color .2s ease, transform .2s ease; }
.signin-sso > i:first-child { font-size: 15px; }
.signin-sso > span { flex: 1; text-align: center; }
.signin-sso > i:last-child { font-size: 11px; transition: transform .2s ease; }
.signin-sso:hover { border-color: var(--signin-accent-hover); background: var(--signin-accent-hover); }
.signin-sso:hover > i:last-child { transform: translateX(3px); }
.signin-sso:active { transform: translateY(1px); }
.signin-assurance { display: flex; align-items: center; justify-content: center; gap: 6px; margin: 13px 0 24px; color: var(--muted); font-size: 10px; }
.signin-assurance i { font-size: 9px; }
.signin-support { margin: 0 -32px; padding: 17px 12px; border-top: 1px solid var(--line); color: var(--muted); text-align: center; font-size: 10px; line-height: 1.5; }
.signin-footer { padding: 12px 20px 22px; color: var(--muted); text-align: center; font-size: 10px; }
.signin-footer span { margin-inline: 7px; }

[data-theme="dark"] .signin-page { --signin-accent: #287ca5; --signin-accent-hover: #328eb8; --signin-art-surface: #202123; --signin-art-line: #383b40; --signin-result-active-ink: #81bfdf; }
[data-theme="dark"] .signin-card { box-shadow: 0 16px 50px rgba(0, 0, 0, .22); }

@keyframes link-packet-in {
  0%, 8% { opacity: 0; transform: translateY(0); }
  15% { opacity: 1; }
  32% { opacity: 0; transform: translateY(15px); }
  100% { opacity: 0; transform: translateY(15px); }
}

@keyframes link-join {
  0%, 25%, 55%, 100% { transform: scale(1); }
  38% { transform: scale(1.12); }
}

@keyframes link-packet-out {
  0%, 42% { opacity: 0; transform: translateY(0); }
  48% { opacity: 1; }
  64.9% { opacity: 1; transform: translateY(18px); }
  65%, 100% { opacity: 0; transform: translateY(18px); }
}

@keyframes link-result {
  0%, 64.9%, 100% { opacity: .5; color: var(--muted); }
  65%, 88% { opacity: 1; color: var(--signin-result-active-ink); }
}

@keyframes link-result-surface {
  0%, 64.9%, 100% { fill: var(--surface-soft); stroke: var(--signin-art-line); }
  65%, 88% { fill: var(--brand-soft); stroke: var(--signin-art-line); }
}

/* Start at the incoming dot's contact point and draw clockwise once. */
@keyframes link-result-trace {
  0%, 64.9% { opacity: 0; stroke-dashoffset: 100; }
  65% { opacity: 1; stroke-dashoffset: 100; }
  82%, 88% { opacity: 1; stroke-dashoffset: 0; }
  100% { opacity: 0; stroke-dashoffset: 0; }
}

@keyframes link-result-check {
  0%, 64.9%, 100% { opacity: 0; }
  65%, 88% { opacity: 1; }
}

@media (max-width: 480px) {
  .signin-toolbar { gap: 12px; padding: 16px; }
  .signin-service { font-size: 10px; }
  .signin-theme .theme-options button { min-width: 30px; min-height: 30px; padding: 5px 8px; }
  .signin-theme .theme-options button span { display: none; }
  .signin-main { padding: 16px 16px 24px; }
  .signin-card { padding: 25px 24px 0; border-radius: 15px; }
  .signin-illustration { margin: 22px -7px 20px; }
  .signin-heading h1 { font-size: 26px; }
  .signin-support { margin-inline: -24px; }
  .signin-footer { padding-bottom: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .link-illustration * { animation: none; }
  .signin-sso, .signin-sso > i:last-child { transition: none; }
  .signin-motion-toggle { display: none; }
}