.hero {
  min-height: calc(100vh - 5rem);
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: center;
}
.intro-panel,
.login-panel {
  padding: 1.5rem;
}
h1 {
  margin-bottom: 0.6rem;
  font-size: clamp(1.6rem, 2.5vw, 2.2rem);
  line-height: 1.1;
}
h2 {
  margin-bottom: 0.4rem;
  font-size: 1.3rem;
}
.lead,
.panel p {
  color: var(--muted);
  line-height: 1.55;
}
.feature-list {
  display: grid;
  gap: 0.65rem;
  margin-top: 1.5rem;
}
.feature {
  padding: 0.85rem 1rem;
  border: 1px solid #e5eaf0;
  border-radius: 8px;
  background: #fff;
}
.feature strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--text);
}
.login-error {
  margin: 0 0 1rem;
  padding: 0.75rem 0.85rem;
  border-radius: 8px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  font-size: 0.88rem;
}
.note {
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--muted);
}
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    align-items: start;
  }
}