:root {
  --bg: hsl(0, 0%, 2%);
  --fg: hsl(45, 100%, 65%);
  --primary: hsl(45, 100%, 55%);
  --border: hsl(45, 20%, 18%);
  --glow: hsla(45, 100%, 55%, 0.15);
  --input-bg: hsl(0, 0%, 10%);
  --bg-card: hsl(0, 0%, 5%);
  --fg-muted: hsl(45, 30%, 40%);
}

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

body {
  font-family: 'IBM Plex Mono', monospace;
  background: var(--bg);
  color: var(--fg);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  text-align: center;
  padding: 3rem 2rem;
  border: 1px solid var(--border);
  background: var(--bg-card);
  width: 90%;
  max-width: 480px;
}

h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  text-shadow: 0 0 12px var(--glow);
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--fg-muted);
  font-size: 0.75rem;
  margin-bottom: 2.5rem;
}

nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

nav a {
  display: block;
  padding: 0.7rem 1.2rem;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--fg);
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--input-bg);
  transition: border-color 0.15s, box-shadow 0.15s;
}

nav a:hover {
  border-color: var(--primary);
  box-shadow: 0 0 8px var(--glow);
}

nav a.login-link {
  border-color: var(--primary);
  box-shadow: 0 0 8px var(--glow);
}

nav a .desc {
  display: block;
  font-size: 0.7rem;
  color: var(--fg-muted);
  margin-top: 0.2rem;
}

@media (min-width: 600px) {
  body {
    font-size: 18px;
  }

  .container {
    padding: 5rem 4rem;
    max-width: 560px;
  }

  h1 {
    font-size: 2rem;
    margin-bottom: 0.6rem;
  }

  .subtitle {
    font-size: 1rem;
    margin-bottom: 3.5rem;
  }

  nav {
    gap: 1rem;
  }

  nav a {
    padding: 1.2rem 1.8rem;
    font-size: 1.05rem;
  }

  nav a .desc {
    font-size: 0.8rem;
    margin-top: 0.3rem;
  }
}