#particles {
  position: fixed;
  inset: 0;
  z-index: -2;
}

.auth-shell {
  width: min(1120px, 94vw);
  margin: 3rem auto;
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 1.2rem;
}

.auth-card,
.auth-panel {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
}

.auth-card {
  padding: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-logo {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: var(--shadow-glow);
}

.brand h1 {
  margin: 0.2rem 0 0;
  font-size: 1.35rem;
}

.intro-copy {
  margin-top: 1.2rem;
}

.intro-copy h2 {
  margin: 0;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
}

.intro-copy p {
  margin-top: 0.45rem;
}

.session-notice {
  margin-top: 1rem;
  border: 1px solid rgba(178, 87, 255, 0.4);
  border-radius: var(--radius-md);
  padding: 0.9rem;
  background: rgba(112, 44, 163, 0.18);
}

.session-notice p {
  margin: 0;
}

.session-actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.75rem;
}

.login-form {
  margin-top: 1.1rem;
  display: grid;
  gap: 0.95rem;
}

.field {
  display: grid;
  gap: 0.35rem;
}

label {
  font-size: 0.9rem;
  color: var(--silver);
}

input {
  width: 100%;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-strong);
  padding: 0.75rem 0.85rem;
}

input:focus-visible {
  outline: 2px solid rgba(209, 141, 255, 0.36);
  border-color: var(--purple);
}

.password-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
}

.small-btn {
  min-width: 72px;
}

.remember-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.remember-row input {
  width: auto;
}

.message {
  margin: 0;
  min-height: 1.3em;
  font-size: 0.92rem;
}

.message.is-error {
  color: var(--danger);
}

.message.is-success {
  color: var(--success);
}

.auth-panel {
  padding: 1.5rem;
  background:
    radial-gradient(circle at 90% -10%, rgba(178, 87, 255, 0.22), transparent 40%),
    var(--surface-strong);
}

.auth-panel h2 {
  margin: 0.7rem 0;
  font-size: clamp(1.25rem, 2.9vw, 1.8rem);
}

.panel-copy {
  margin-top: 0;
}

.feature-list {
  margin: 0;
  padding-left: 1rem;
  color: var(--text-muted);
  display: grid;
  gap: 0.45rem;
}

.credentials {
  margin-top: 1rem;
  border: 1px dashed rgba(255, 255, 255, 0.25);
  border-radius: 12px;
  padding: 0.9rem;
  display: grid;
  gap: 0.15rem;
}

.credentials span {
  color: var(--silver);
  font-size: 0.82rem;
}

.credentials strong {
  color: var(--purple-bright);
}

@media (max-width: 980px) {
  .auth-shell {
    grid-template-columns: 1fr;
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
  }

  .auth-card,
  .auth-panel {
    padding: 1.15rem;
  }
}

@media (max-width: 560px) {
  .session-actions {
    flex-direction: column;
  }

  .small-btn {
    min-width: 0;
  }
}