*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0f0f11;
  --surface: #18181b;
  --border: #2a2a2f;
  --text: #e4e4e7;
  --muted: #71717a;
  --accent: #6366f1;
  --accent-hover: #818cf8;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.placeholder {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 3rem 3.5rem;
  max-width: 480px;
  width: 100%;
  text-align: center;
  box-shadow: 0 0 0 1px rgba(255,255,255,.04), 0 24px 48px rgba(0,0,0,.4);
}

h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: #fff;
  margin-bottom: 0.75rem;
}

.tagline {
  font-size: 1.05rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

@media (max-width: 500px) {
  .card {
    padding: 2rem 1.5rem;
  }

  h1 {
    font-size: 1.75rem;
  }
}