:root{
  --bg:#ffffff;
  --text:#111827;
  --muted:#4b5563;
  --border:#e5e7eb;
  --accent:#2563eb;
  --max: 980px;
  --radius: 14px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
}

a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 18px 56px;
}

header{
  padding: 18px 0 10px;
  border-bottom: 1px solid var(--border);
}

.brand{
  display:flex;
  flex-direction:column;
  gap:8px;
}

.brand h1{
  margin:0;
  font-size: 28px;
  letter-spacing: .2px;
}

.brand p{
  margin:0;
  color:var(--muted);
  font-size: 14px;
}

main{
  padding-top: 18px;
  display:flex;
  flex-direction:column;
  gap:18px;
}

.card{
  border:1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 16px;
}

.card h2{
  margin:0 0 10px;
  font-size: 18px;
}

.scope-list{
  margin: 0;
  padding-left: 18px;
}
.scope-list li{
  margin: 6px 0;
}

footer{
  margin-top: 26px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  display:flex;
  flex-direction:column;
  gap:6px;
}

@media (min-width: 760px){
  .brand h1{font-size: 32px;}
  .card{padding: 22px 20px;}
}