:root{
  --ua-bg: #f8fafc;
  --ua-card: #ffffff;
  --ua-text: #0f172a;
  --ua-muted: #475569;
  --ua-border: #e2e8f0;
  --ua-link: #2563eb;
  --ua-max: 980px;
}

body{
  background: var(--ua-bg);
  color: var(--ua-text);
}

.ua-page{
  padding: 28px 16px 56px;
}

.ua-container{
  max-width: var(--ua-max);
  margin: 0 auto;
}

.ua-topbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.ua-topbar a{
  color: var(--ua-link);
  text-decoration: none;
  font-weight: 600;
}

.ua-topbar a:hover{
  text-decoration: underline;
}

.ua-card{
  background: var(--ua-card);
  border: 1px solid var(--ua-border);
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(2, 6, 23, 0.06);
  padding: 28px;
}

.ua-title{
  font-size: 32px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

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

.ua-divider{
  height: 1px;
  background: var(--ua-border);
  margin: 20px 0;
  border: 0;
}

.ua-toc{
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: 12px;
  padding: 14px 16px;
}

.ua-toc-title{
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ua-muted);
}

.ua-toc ul{
  margin: 0;
  padding-left: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 18px;
}

.ua-toc a{
  color: var(--ua-link);
  text-decoration: none;
}

.ua-toc a:hover{
  text-decoration: underline;
}

article{
  margin-top: 18px;
}

section{
  scroll-margin-top: 16px;
  padding-top: 6px;
}

h2{
  font-size: 20px;
  margin: 18px 0 10px;
}

h3{
  font-size: 16px;
  margin: 14px 0 8px;
  color: var(--ua-text);
}

p{
  margin: 10px 0;
  color: var(--ua-text);
  line-height: 1.85;
  word-break: break-word;
}

.ua-muted{
  color: var(--ua-muted);
}

.ua-list{
  margin: 8px 0 12px;
  padding-left: 18px;
  line-height: 1.85;
  color: var(--ua-text);
}

.ua-footer{
  margin-top: 24px;
  color: var(--ua-muted);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

@media (max-width: 720px){
  .ua-card{ padding: 20px; border-radius: 14px; }
  .ua-title{ font-size: 26px; }
  .ua-toc ul{ grid-template-columns: 1fr; }
}

@media (max-width: 420px){
  .ua-page{ padding: 18px 12px 48px; }
  .ua-title{ font-size: 22px; }
}