/* Atlas auth screen — themed to the light/dark design system. */
html.auth-lock, body.auth-lock {
  overflow: hidden;
  height: 100vh;
}
.auth-screen {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 1rem;
}
.auth-screen[hidden] { display: none !important; }

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
  padding: 2rem 2rem 1.6rem;
}
.auth-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
}
.auth-sub {
  color: var(--ink-soft);
  margin: 0.4rem 0 1.3rem;
  font-size: 0.9rem;
}

.auth-tabs {
  display: flex;
  gap: 0.25rem;
  background: var(--panel-2);
  padding: 0.25rem;
  border-radius: 999px;
  margin-bottom: 0.5rem;
}
.auth-tab {
  flex: 1;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  padding: 0.45rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.15s ease, color 0.15s ease;
}
.auth-tab.sel {
  background: var(--panel);
  color: var(--accent);
  box-shadow: var(--shadow);
}

.auth-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin: 1.1rem 0 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.auth-input {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-soft);
  color: var(--ink);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.auth-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.auth-error {
  background: var(--down-soft);
  color: var(--down);
  border: 1px solid var(--down-soft);
  padding: 0.5rem 0.7rem;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-top: 0.9rem;
}
.auth-submit {
  width: 100%;
  margin-top: 1.4rem;
  padding: 0.75rem;
  border: 0;
  border-radius: 9px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: opacity 0.15s ease;
}
.auth-submit:disabled { opacity: 0.6; cursor: default; }
.auth-note {
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.75rem;
  margin-top: 1.4rem;
}
.logout-link {
  align-self: center;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 0;
  background: none;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
}
.logout-link:hover { color: var(--ink); }