:root {
  --color-bg: #f7f7f9;
  --color-text: #1f1f1f;
  --color-muted: #6b6b6b;
  --color-accent: #3b5bfd;
  --color-card-bg: #ffffff;
  --color-border: #e3e3e8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

.site-header {
  text-align: center;
  padding: 4rem 1rem 2rem;
}

.site-header h1 {
  margin: 0;
  font-size: 2.5rem;
  letter-spacing: 0.02em;
}

.tagline {
  margin-top: 0.5rem;
  color: var(--color-muted);
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.app-card {
  display: block;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.app-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
}

.app-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: var(--color-accent);
}

.app-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.app-card.coming-soon {
  opacity: 0.6;
  pointer-events: none;
  border-style: dashed;
}

.ad-slot {
  max-width: 960px;
  margin: 3rem auto 0;
  padding: 0 1.5rem;
  text-align: center;
}

.site-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--color-muted);
  font-size: 0.85rem;
}