:root {
  --color-bg: #0f1115;
  --color-surface: #161922;
  --color-text: #e8eaf0;
  --color-muted: #9aa0ad;
  --color-accent: #4f8cff;
  --color-accent-hover: #6aa1ff;
  --color-border: #262a36;
  --max-width: 880px;
  --radius: 8px;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-stack);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--color-border);
}

.hero h1 {
  font-size: 56px;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.hero .tagline {
  font-size: 22px;
  color: var(--color-muted);
  margin: 0 0 32px;
}

.hero .lead {
  font-size: 16px;
  color: var(--color-text);
  margin: 0 0 40px;
  max-width: 720px;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-block;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.button-primary {
  background: var(--color-accent);
  color: #fff;
}

.button-primary:hover {
  background: var(--color-accent-hover);
}

.button-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.button-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-hover);
}

.site-footer {
  padding: 32px 0 48px;
  color: var(--color-muted);
  font-size: 13px;
}

.site-footer p {
  margin: 4px 0;
}

@media (max-width: 600px) {
  .hero {
    padding: 64px 0 48px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero .tagline {
    font-size: 18px;
  }

  .button {
    width: 100%;
    text-align: center;
  }
}