.sdn-auth {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 18px;
}

.sdn-auth-card {
  width: min(100%, 1040px);
  display: grid;
  grid-template-columns: 1fr 420px;
  overflow: hidden;
  border: 1px solid rgba(217, 226, 236, 0.9);
  border-radius: 22px;
  background: var(--sdn-panel);
  box-shadow: var(--sdn-shadow);
}

.sdn-auth-hero {
  min-height: 560px;
  padding: 56px;
  background: linear-gradient(135deg, #0d1726 0%, #12293a 58%, #17384a 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.sdn-brand {
  font-size: 30px;
  font-weight: 800;
}

.sdn-brand span {
  color: #48d5e7;
}

.sdn-auth-hero h1 {
  max-width: 560px;
  margin: 80px 0 18px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.02;
}

.sdn-auth-hero p {
  max-width: 520px;
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 17px;
  line-height: 1.7;
}

.sdn-auth-points {
  display: grid;
  gap: 12px;
  margin: 40px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.sdn-auth-points div {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sdn-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--sdn-primary);
  box-shadow: 0 0 0 5px rgba(26, 164, 184, 0.15);
}

.sdn-login-panel {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.sdn-login-panel h2 {
  margin: 0 0 8px;
  font-size: 28px;
}

.sdn-login-panel > p {
  margin: 0 0 30px;
  color: var(--sdn-muted);
  line-height: 1.55;
}

.sdn-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 4px 0 24px;
  color: var(--sdn-muted);
  font-size: 14px;
}

.sdn-row label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.sdn-login-panel .sdn-btn {
  width: 100%;
}

@media (max-width: 860px) {
  .sdn-auth-card {
    grid-template-columns: 1fr;
  }

  .sdn-auth-hero {
    min-height: auto;
    padding: 36px 28px;
  }

  .sdn-auth-hero h1 {
    margin-top: 42px;
  }

  .sdn-login-panel {
    padding: 34px 26px;
  }
}