:root {
  --mnt-bg: #0f172a;
  --mnt-accent: #38bdf8;
  --mnt-text: #e2e8f0;
  --mnt-muted: #94a3b8;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans KR", system-ui, sans-serif;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, #1e3a5f 0%, var(--mnt-bg) 55%);
  color: var(--mnt-text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.mnt-landing-card {
  max-width: 440px;
  width: 100%;
  background: rgba(30, 41, 59, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

.mnt-landing-card h1 {
  font-size: 1.35rem;
  margin: 0 0 8px;
}

.mnt-landing-card p {
  margin: 0 0 24px;
  color: var(--mnt-muted);
  line-height: 1.5;
  font-size: 0.95rem;
}

.mnt-landing-card a.btn {
  display: block;
  text-align: center;
  padding: 12px 20px;
  border-radius: 10px;
  background: var(--mnt-accent);
  color: #0f172a;
  font-weight: 600;
  text-decoration: none;
}

.mnt-landing-sub {
  margin-top: 16px;
  font-size: 0.8rem;
  color: var(--mnt-muted);
  text-align: center;
}