*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.7;color:#1d1d1f;background:#fafafa}
a{color:#0066cc;text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:720px;margin:0 auto;padding:2rem 1.5rem}
header{border-bottom:1px solid #e5e5e5;padding-bottom:1rem;margin-bottom:2rem}
header .brand{font-size:1.25rem;font-weight:700;color:#1d1d1f;letter-spacing:-.02em}
header nav{margin-top:.5rem}
header nav a{margin-right:1.25rem;font-size:.875rem;color:#555}
header nav a:hover{color:#0066cc}

h1{font-size:1.75rem;font-weight:700;margin-bottom:.5rem;color:#1d1d1f}
h2{font-size:1.3rem;font-weight:600;margin-top:2rem;margin-bottom:.75rem;color:#1d1d1f}
h3{font-size:1.05rem;font-weight:600;margin-top:1.5rem;margin-bottom:.5rem;color:#333}
p{margin-bottom:1rem}
ul,ol{margin-bottom:1rem;padding-left:1.5rem}
li{margin-bottom:.35rem}
strong{font-weight:600}

.subtitle{color:#666;font-size:1rem;margin-bottom:2rem}
.updated{color:#888;font-size:.85rem;margin-bottom:2rem}

.hero{text-align:center;padding:4rem 0 2rem}
.hero h1{font-size:2rem}
.hero .tagline{color:#555;font-size:1.15rem;margin-top:.5rem}
.app-card{border:1px solid #e5e5e5;border-radius:12px;padding:1.5rem;margin-top:2rem;background:#fff}
.app-card h2{margin-top:0;font-size:1.2rem}
.app-card .links{margin-top:1rem}
.app-card .links a{margin-right:1rem;font-size:.9rem}

footer{border-top:1px solid #e5e5e5;margin-top:3rem;padding-top:1rem;color:#888;font-size:.8rem;text-align:center}

@media(max-width:600px){
  .container{padding:1.25rem 1rem}
  h1{font-size:1.4rem}
  h2{font-size:1.15rem}
  .hero{padding:2.5rem 0 1.5rem}
  .hero h1{font-size:1.6rem}
}