.auth-body { min-height: 100vh; }
.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  position: relative;
}
.auth-theme {
  position: absolute;
  top: 1rem;
  right: 1rem;
}
.auth-panel {
  width: min(420px, 100%);
  background: color-mix(in srgb, var(--bg-panel) 88%, transparent);
  border: 1px solid var(--line);
  border-radius: .75rem;
  padding: 1.75rem;
  backdrop-filter: blur(8px);
}
.brand-mark {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: .18em;
  font-weight: 800;
  color: var(--accent);
}
.auth-panel h1 {
  margin: .4rem 0 .2rem;
  font-family: var(--font-display);
  font-size: 1.8rem;
}
.auth-sub { margin: 0 0 1.2rem; color: var(--muted); }
.auth-form { display: grid; gap: .65rem; }
.auth-form label { display: grid; gap: .35rem; font-size: .92rem; color: var(--muted); }
.auth-form input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: .4rem;
  background: var(--bg);
  color: var(--text);
  padding: .7rem .8rem;
  font: inherit;
}