:root{--node:#fff;--soft:color-mix(in srgb,var(--track) 5%,var(--surface));--accent-line:color-mix(in srgb,var(--track) 42%,var(--line))}
html[data-diagram-theme="dark"]{--node:#17191e;--soft:color-mix(in srgb,var(--track) 9%,#111318)}
*{box-sizing:border-box}html,body{margin:0;padding:0;overflow:hidden;background:transparent;letter-spacing:0}
body{color:var(--text);font-family:Pretendard,"Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic","Segoe UI",sans-serif;word-break:keep-all;overflow-wrap:anywhere}
.diagram,.diagram *{min-width:0;max-width:100%}.diagram{display:grid;gap:14px;width:100%;padding:18px;border:1px solid var(--line);border-radius:8px;background:var(--paper);contain:layout paint}
h1,h2,p{margin:0}.head{display:grid;gap:7px}.head h1{font-size:23px;line-height:1.27;letter-spacing:-.012em}.lead{max-width:920px;color:var(--muted);font-size:13px;line-height:1.58}
.visual{position:relative;padding:14px;border:1px solid var(--line);border-radius:8px;background:var(--soft)}
.tree-node{position:relative;display:grid;align-content:start;gap:6px;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--node)}
.key{width:fit-content;padding:3px 7px;border:1px solid var(--accent-line);border-radius:6px;background:var(--track-tint);color:var(--track-strong);font-size:11px;font-weight:850;line-height:1.3}
h2{font-size:14px;line-height:1.35}.tree-node p{color:var(--muted);font-size:12px;line-height:1.48}
.root-node{display:grid;gap:4px;width:min(420px,82%);margin:0 auto;padding:11px 14px;border:1px solid var(--accent-line);border-radius:8px;background:var(--track-tint);text-align:center}
.root-node strong{color:var(--text);font-size:15px;line-height:1.35}.root-node span{color:var(--muted);font-size:12px;line-height:1.42}
.trunk{display:block;width:2px;height:20px;margin:0 auto;background:var(--accent-line)}.branches{position:relative;display:grid;grid-template-columns:repeat(var(--item-count),minmax(0,1fr));gap:10px;padding-top:12px}.branches::before{content:"";position:absolute;top:0;left:calc(50% / var(--item-count));right:calc(50% / var(--item-count));height:2px;background:var(--accent-line)}
.tree-node::before{content:"";position:absolute;top:-12px;left:50%;width:2px;height:12px;background:var(--accent-line)}
.note{display:grid;grid-template-columns:auto minmax(0,1fr);gap:9px;align-items:start;padding:11px 12px;border:1px solid var(--accent-line);border-radius:8px;background:var(--track-tint);font-size:12px;line-height:1.5}.note strong{color:var(--track-strong)}.note span{color:var(--muted)}
@media(max-width:760px){.diagram{padding:14px;gap:12px}.head h1{font-size:20px}.visual{padding:12px}.branches{grid-template-columns:repeat(var(--mobile-cols),minmax(0,1fr))}.branches::before,.tree-node::before{display:none}.trunk{height:14px}.note{grid-template-columns:1fr}}
@media(max-width:420px){.branches{grid-template-columns:1fr}.root-node{width:100%}}