:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #f8fafc;
  color: #0f172a;
}

.sso-transition {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 1.5rem;
}

.sso-transition__fallback {
  visibility: hidden;
  width: min(100%, 28rem);
  padding: 2rem;
  border: 1px solid #e2e8f0;
  border-radius: 1rem;
  background: #fff;
  box-shadow: 0 1.25rem 3rem rgb(15 23 42 / 10%);
  text-align: center;
  opacity: 0;
  animation: sso-fallback-reveal 180ms ease 2s forwards;
}

.sso-transition__mark {
  display: grid;
  width: 3rem;
  height: 3rem;
  margin: 0 auto 1rem;
  place-items: center;
  border-radius: 0.875rem;
  background: #4f46e5;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
}

.sso-transition__title {
  margin: 0;
  font-size: 1.375rem;
  line-height: 1.3;
}

.sso-transition__message {
  margin: 0.75rem 0 1.5rem;
  color: #475569;
  line-height: 1.6;
}

.sso-transition__button {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.7rem 1rem;
  border: 0;
  border-radius: 0.625rem;
  background: #4f46e5;
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 650;
}

.sso-transition__button:hover {
  background: #4338ca;
}

.sso-transition__button:focus-visible {
  outline: 3px solid rgb(99 102 241 / 35%);
  outline-offset: 3px;
}

@keyframes sso-fallback-reveal {
  to {
    visibility: visible;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sso-transition__fallback {
    animation-duration: 1ms;
  }
}