.auth-shell {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  overflow: hidden;
  padding: 0.75rem;
}

.auth-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  height: calc(100svh - 1.5rem);
}

.auth-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  padding: 1.4rem 1.25rem;
  border-radius: 1.75rem;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.auth-mark {
  display: block;
  align-self: flex-start;
  height: 28px;
  width: auto;
  max-width: 11.5rem;
  object-fit: contain;
}

.auth-pane {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 1.4rem 0;
}

.auth-form {
  margin: auto;
  width: 100%;
  max-width: 23.75rem;
}

.auth-form h1 {
  margin: 0 0 0.35rem;
  font-size: 1.85rem;
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.auth-form .lede {
  margin: 0 0 1.4rem;
}

.auth-submit {
  width: 100%;
  height: 3rem;
}

.auth-form .form-actions {
  margin-top: 0.35rem;
}

.auth-footer {
  margin-top: 1.4rem;
  color: var(--faint);
  font-size: 0.8rem;
  text-align: center;
}

.auth-art {
  display: none;
  position: relative;
  overflow: hidden;
  border-radius: 2rem;
  --text-on-art: #f5f5f3;
  background:
    radial-gradient(ellipse 80% 60% at 22% 18%, rgba(94, 176, 246, 0.22), transparent 60%),
    radial-gradient(ellipse 70% 70% at 82% 78%, rgba(94, 176, 246, 0.16), transparent 62%),
    conic-gradient(from 210deg at 62% 38%, #241f14, #14130f 30%, #2e2716 58%, #17150f 80%, #241f14);
}

.auth-art::before {
  content: "";
  position: absolute;
  inset: -30%;
  background:
    repeating-linear-gradient(48deg, rgba(94, 176, 246, 0.14) 0 1.5px, transparent 1.5px 9px),
    repeating-linear-gradient(48deg, rgba(94, 176, 246, 0.08) 0 1px, transparent 1px 26px);
  mask-image: radial-gradient(ellipse 65% 65% at 58% 45%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 65% 65% at 58% 45%, #000 25%, transparent 78%);
  transform: rotate(-6deg);
  pointer-events: none;
}

.auth-art::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 70% at 50% 50%, transparent 30%, rgba(0, 0, 0, 0.45) 100%);
  pointer-events: none;
}

.auth-art-copy {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 2.5rem;
  text-align: center;
}

.auth-art-copy img {
  display: block;
  height: 3.25rem;
  width: auto;
  max-width: min(16rem, 72%);
  object-fit: contain;
}

.auth-headline {
  margin: 2rem 0 0;
  max-width: 28rem;
  min-height: 4.2rem;
  color: var(--text-on-art);
  font-size: 1.65rem;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.auth-sub {
  margin: 0.75rem 0 0;
  max-width: 22rem;
  color: rgba(245, 245, 243, 0.7);
  font-size: 0.9rem;
  line-height: 1.55;
}

@media (min-width: 1024px) {
  .auth-shell { padding: 1.25rem; }
  .auth-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    height: calc(100svh - 2.5rem);
  }
  .auth-panel {
    padding: 2.5rem;
    border-radius: 2rem;
  }
  .auth-art { display: block; }
  .auth-art-copy img { height: 3.5rem; }
  .auth-headline { font-size: 1.85rem; }
}