.login-surface {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  justify-items: center;
  align-items: center;
  min-height: 100dvh;
  height: 100dvh;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1.25rem 0;
  overscroll-behavior: contain;
}

.login-surface[hidden],
.app-surface[hidden] {
  display: none;
}

.login-card {
  width: min(32rem, calc(100vw - 2rem));
  padding: 2.5rem 2rem;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.12);
}

.login-heading {
  font-family: var(--serif);
  font-weight: 400;
  color: var(--ink);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.06;
  letter-spacing: -0.015em;
  max-width: 18ch;
}

.login-sub {
  margin-top: 1.2rem;
  max-width: 38ch;
  line-height: 1.7;
}

.login-actions {
  margin-top: 2rem;
  display: grid;
  gap: 0.75rem;
}

.sign-in-button,
.secondary-login-button {
  width: 100%;
  min-height: 3.2rem;
  padding: 0.8rem 1.4rem;
  font-family: var(--body);
  font-weight: 400;
  font-size: 1rem;
  text-align: center;
}

.sign-in-button {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: #0b0a07;
  cursor: pointer;
}

.secondary-login-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
}

.sign-in-button:hover:not(:disabled) {
  background: var(--bg);
  border-color: var(--accent);
  color: var(--accent);
}

.secondary-login-button:hover,
.secondary-login-button:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.sign-in-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.login-status {
  margin-top: 1rem;
}

.auth-identity {
  margin: 1rem 0 0;
  color: var(--ink-body);
  font-size: 0.88rem;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.auth-identity[hidden] {
  display: none;
}

.auth-transition {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  line-height: 1.5;
}

.auth-transition[hidden] {
  display: none;
}

.auth-spinner {
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: auth-spin 0.8s linear infinite;
}

.login-surface.auth-pending .login-actions {
  opacity: 0.42;
  pointer-events: none;
}

@keyframes auth-spin {
  to {
    transform: rotate(360deg);
  }
}

.login-note {
  margin-top: 1.2rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
  max-width: 38ch;
  line-height: 1.6;
}

.auth-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--maxw), calc(100vw - 28px));
  margin: 1.5rem auto 0;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
  background: var(--panel);
}

.auth-bar .role-picker {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin: 0;
  padding: 0;
  border: 0;
}

.auth-bar .role-picker legend {
  padding: 0;
  margin-right: 0.5rem;
  font-family: var(--display);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.auth-bar .role-picker label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--ink-body);
  font-size: 0.9rem;
  cursor: pointer;
}

.projection-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
  width: min(var(--maxw), calc(100vw - 28px));
  margin: 0.8rem auto 0;
}

.projection-bar .warning {
  margin: 0;
  padding: 0.8rem 1rem;
  flex: 1;
  min-width: 0;
}

@media (max-width: 640px) {
  .login-card {
    padding: 1.8rem 1.4rem;
  }

  .auth-bar {
    flex-direction: column;
    align-items: start;
  }

  .auth-bar .role-picker {
    flex-direction: column;
    align-items: start;
    gap: 0.5rem;
  }
}

@media (max-height: 680px) {
  .login-surface {
    align-items: start;
  }
}