/* ─── Auth ──────────────────────────────────────── */
#auth-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at top, #1e1b4b 0%, #0f0d2a 65%);
}
body.theme-mono-light #auth-screen {
  background: linear-gradient(135deg, #e0e7ff 0%, #f3f4f6 100%);
}

.auth-card {
  background: var(--surface0);
  border: 1px solid var(--surface1);
  border-radius: calc(var(--radius) * 1.5);
  padding: 2.5rem 2rem;
  width: 360px;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  box-shadow: 0 8px 40px rgba(0,0,0,0.35);
}
body.theme-mono-light .auth-card {
  box-shadow: 0 4px 24px rgba(79,70,229,0.10);
}

.auth-logo {
  display: block;
  width: 220px;
  margin: 0 auto 0.1rem;
  filter: var(--logo-filter);
}

.tagline {
  text-align: center;
  color: var(--subtext0);
  font-size: 0.8rem;
  margin-top: -0.5rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.tab-row {
  display: flex;
  gap: 0.5rem;
}

.tab {
  flex: 1;
  padding: 0.5rem;
  background: var(--surface1);
  border: none;
  border-radius: var(--radius);
  color: var(--subtext1);
  cursor: pointer;
  font-size: 0.9rem;
  font-family: inherit;
  font-weight: 600;
  transition: background 0.15s;
}

.tab.active {
  background: var(--primary);
  color: #fff;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ─── Splash screen ─────────────────────────────── */
#splash-screen {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: radial-gradient(ellipse at top, #1e1b4b 0%, #0f0d2a 65%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  pointer-events: none;
  transition: opacity 0.5s ease;
}
body.theme-mono-light #splash-screen {
  background: linear-gradient(135deg, #e0e7ff 0%, #f3f4f6 100%);
}
#splash-screen.fade-out { opacity: 0; }

.splash-logo {
  width: 260px;
  opacity: 0;
  animation: splash-logo-in 0.7s 0.15s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  filter: var(--logo-filter);
}
.splash-tagline {
  opacity: 0;
  animation: splash-logo-in 0.6s 0.6s ease forwards;
  color: var(--subtext0);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
@keyframes splash-logo-in {
  from { opacity: 0; transform: translateY(14px) scale(0.9); }
  to   { opacity: 1; transform: translateY(0)   scale(1);   }
}