*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.7;
  color: #1e293b;
  background: #f8fafc;
}
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

/* nav */
nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 2rem;
  max-width: 960px;
  margin: 0 auto;
}
nav .logo { display: flex; align-items: center; gap: 0.5rem; margin-right: auto; font-weight: 700; font-size: 1.1rem; color: #1e293b; }
nav .logo img { width: 28px; height: 28px; }
nav a { font-size: 0.9rem; font-weight: 500; color: #475569; }
nav a:hover { color: #1e293b; text-decoration: none; }
nav a.active { color: #2563eb; }

/* layout */
.page { max-width: 960px; margin: 0 auto; padding: 2rem; min-height: calc(100vh - 140px); }

/* hero */
.hero { text-align: center; padding: 3rem 0; }
.hero .logo-big { width: 80px; height: 80px; margin: 0 auto 1rem; }
.hero h1 { font-size: 2.25rem; font-weight: 800; letter-spacing: -0.02em; color: #0f172a; }
.hero p { font-size: 1.1rem; color: #64748b; margin-top: 0.5rem; max-width: 520px; margin-left: auto; margin-right: auto; }

/* app card */
.app-grid { display: flex; flex-direction: column; gap: 1.5rem; margin-top: 2rem; }
.app-card {
  display: flex; gap: 1.5rem; align-items: flex-start;
  background: #fff; border: 1px solid #e2e8f0; border-radius: 12px; padding: 1.5rem;
  transition: box-shadow 0.15s;
}
.app-card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.app-card .icon { width: 56px; height: 56px; flex-shrink: 0; border-radius: 12px; }
.app-card .body { flex: 1; }
.app-card h3 { font-size: 1.1rem; font-weight: 700; color: #0f172a; }
.app-card p { font-size: 0.9rem; color: #64748b; margin-top: 0.2rem; }
.app-card .meta { display: flex; gap: 1rem; margin-top: 0.5rem; font-size: 0.8rem; color: #94a3b8; }
.app-card .badge {
  display: inline-block; background: #eef2ff; color: #4f46e5; font-size: 0.75rem; font-weight: 600;
  padding: 0.15rem 0.5rem; border-radius: 999px; margin-top: 0.25rem;
}

/* footer */
footer { text-align: center; padding: 2rem; font-size: 0.85rem; color: #94a3b8; }
footer a { color: #64748b; }

/* privacy */
.privacy {
  max-width: 720px; margin: 0 auto; background: #fff; border: 1px solid #e2e8f0;
  border-radius: 12px; padding: 2.5rem 2rem;
}
.privacy h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.25rem; }
.privacy .last-updated { color: #64748b; font-size: 0.9rem; margin-bottom: 1.5rem; }
.privacy h2 { font-size: 1.2rem; font-weight: 700; margin-top: 2rem; margin-bottom: 0.75rem; padding-bottom: 0.25rem; border-bottom: 1px solid #e2e8f0; }
.privacy h3 { font-size: 1.05rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: 0.5rem; }
.privacy p { margin-bottom: 0.75rem; }
.privacy ul { padding-left: 1.25rem; margin-bottom: 0.75rem; }
.privacy li { margin-bottom: 0.35rem; }
.privacy hr { border: none; border-top: 1px solid #e2e8f0; margin: 1.5rem 0; }

/* markdown-style lists for privacy */
.privacy strong { font-weight: 700; }

@media (max-width: 640px) {
  nav { padding: 0.75rem 1rem; gap: 1rem; }
  nav .logo { font-size: 1rem; }
  .page { padding: 1.5rem 1rem; }
  .hero h1 { font-size: 1.75rem; }
  .app-card { flex-direction: column; }
  .privacy { padding: 1.5rem 1.25rem; }
}