.tab-layout{display:grid;grid-template-columns:minmax(210px,.34fr) minmax(0,1fr);gap:28px;align-items:stretch}
.tab-list{display:flex;flex-direction:column;gap:7px}
.tab-button{
  position:relative;
  display:flex;
  width:100%;
  min-height:52px;
  align-items:center;
  gap:11px;
  padding:12px 16px;
  border-radius:var(--radius-sm);
  background:transparent;
  color:var(--color-muted);
  text-align:left;
  cursor:pointer;
}
.tab-button svg{width:19px;height:19px;flex-shrink:0}
.tab-button:hover{background:var(--color-panel);color:var(--color-text)}
.tab-button[aria-selected="true"]{background:var(--color-panel-soft);color:var(--color-accent-deep);font-weight:750}
.tab-button[aria-selected="true"]::before{
  position:absolute;
  top:10px;
  bottom:10px;
  left:0;
  width:3px;
  border-radius:var(--radius-pill);
  background:var(--color-accent);
  content:"";
}
.tab-panel{
  min-width:0;
  padding:clamp(24px,4vw,42px);
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  background:var(--color-panel);
  color:var(--color-text);
  box-shadow:var(--shadow-layered);
}
.tab-panel[hidden]{display:none}
.setting-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  margin-top:24px;
  padding:14px 16px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-sm);
  background:var(--color-bg);
  color:var(--color-text);
}
.setting-value{color:var(--color-accent-deep);font-family:var(--font-mono);font-size:.84rem;font-weight:700}
.mini-switch{
  width:42px;
  height:24px;
  flex-shrink:0;
  padding:3px;
  border-radius:var(--radius-pill);
  background:var(--color-accent);
}
.mini-switch::after{
  display:block;
  width:18px;
  height:18px;
  margin-left:auto;
  border-radius:50%;
  background:var(--color-panel);
  content:"";
}
.toc{
  position:sticky;
  top:18px;
  z-index:10;
  display:flex;
  gap:8px;
  padding:9px;
  overflow-x:auto;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-panel);
  color:var(--color-text);
  box-shadow:var(--shadow-mid);
  scrollbar-width:thin;
}
.toc a{
  flex:0 0 auto;
  padding:8px 13px;
  border-radius:var(--radius-pill);
  color:var(--color-muted);
  font-size:.86rem;
  font-weight:650;
  text-decoration:none;
}
.toc a:hover{background:var(--color-panel-soft);color:var(--color-accent-deep)}
.faq-list{display:grid;gap:12px}
.faq-item{
  overflow:clip;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-panel);
  color:var(--color-text);
  box-shadow:var(--shadow-soft);
}
.faq-item summary{
  display:flex;
  min-height:58px;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:16px 20px;
  color:var(--color-text);
  font-weight:750;
  cursor:pointer;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{flex-shrink:0;color:var(--color-accent-deep);font-size:1.25rem;content:"+"}
.faq-item[open] summary::after{content:"−"}
.faq-answer{padding:0 20px 20px;color:var(--color-muted)}
.term-grid,.article-grid,.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.term-card,.article-card,.download-card{
  min-width:0;
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  background:var(--color-panel);
  color:var(--color-text);
  box-shadow:var(--shadow-mid);
}
.term-card{padding:24px}
.term-card dt{margin-bottom:8px;color:var(--color-text);font-family:var(--font-display);font-size:1.12rem;font-weight:800}
.term-card dd{color:var(--color-muted)}
.article-card{display:flex;flex-direction:column;padding:24px}
.article-meta{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:13px;color:var(--color-muted);font-size:.8rem}
.article-card h3{margin-bottom:11px}
.article-card p{color:var(--color-muted)}
.article-card>a:last-child{margin-top:auto;padding-top:18px;font-weight:750;text-decoration:none}
.download-card{position:relative;padding:26px}
.download-card-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.app-logo{width:52px;height:52px;flex-shrink:0}
.download-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.badge{
  display:inline-flex;
  max-width:100%;
  align-items:center;
  padding:5px 10px;
  overflow:hidden;
  border:1px solid var(--color-border);
  border-radius:var(--radius-pill);
  background:var(--color-panel-soft);
  color:var(--color-accent-deep);
  font-size:.76rem;
  font-weight:750;
}
.badge-primary{border-color:var(--color-accent);background:var(--color-accent);color:var(--color-panel)}
.badge-recommended{border-color:var(--color-accent);background:var(--color-panel);color:var(--color-accent-deep)}
.badge-retired{border-color:var(--color-border);background:var(--color-bg);color:var(--color-muted)}
.callout{
  position:relative;
  padding:20px 22px 20px 48px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-panel-soft);
  color:var(--color-text);
}
.callout::before{
  position:absolute;
  top:20px;
  left:20px;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--color-accent);
  box-shadow:0 0 0 5px var(--color-accent-ring);
  content:"";
}
.callout strong{color:var(--color-accent-deep)}
.end-download-card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  margin-top:48px;
  padding:26px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  background:var(--color-panel);
  color:var(--color-text);
  box-shadow:var(--shadow-layered);
}
.dl-fab{
  position:fixed;
  z-index:40;
  right:20px;
  bottom:20px;
  display:flex;
  max-width:min(330px,calc(100vw - 32px));
  align-items:center;
  gap:12px;
  padding:13px 17px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-panel);
  color:var(--color-text);
  box-shadow:var(--shadow-near),var(--shadow-mid);
  text-decoration:none;
}
.dl-fab:hover{color:var(--color-text);transform:translateY(-2px)}
.dl-fab-icon{
  display:grid;
  width:36px;
  height:36px;
  flex-shrink:0;
  place-items:center;
  border-radius:var(--radius-sm);
  background:var(--color-panel-soft);
  color:var(--color-accent-deep);
}
.dl-fab-icon svg{width:18px;height:18px}
.dl-fab-text{min-width:0}
.dl-fab-text strong,.dl-fab-text span{display:block}
.dl-fab-text span{color:var(--color-muted);font-size:.78rem}
@media (max-width:820px){
  .tab-layout{grid-template-columns:1fr}
  .tab-list{flex-direction:row;overflow-x:auto;padding-bottom:4px}
  .tab-button{width:auto;min-width:max-content}
  .term-grid,.article-grid,.download-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .term-grid,.article-grid,.download-grid{grid-template-columns:1fr}
  .setting-row,.end-download-card{align-items:flex-start;flex-direction:column}
  .download-actions .button{width:100%}
  .dl-fab{right:16px;bottom:16px}
  .toc{top:8px}
}