:root{color-scheme:light dark;--bg:#f7f4ec;--panel:#fffdf8;--ink:#202e27;--muted:#526056;--line:#c9d0c3;--accent:#286448;--soft:#e7ecde}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,sans-serif}.rv-header{display:flex;align-items:center;gap:24px;padding:20px 5%;border-bottom:1px solid var(--line)}.rv-brand{font:30px Georgia,serif}.rv-header span{font-size:11px;letter-spacing:.13em;color:var(--muted)}.rv-header>a:last-child{margin-left:auto}a{color:var(--accent)}main{max-width:1160px;margin:auto;padding:32px 28px}h1,h2,h3{font-family:Georgia,serif;font-weight:400;line-height:1.15}h1{font-size:clamp(32px,4vw,52px);margin:24px 0 12px}h2{font-size:26px}.rv-notice{padding:16px 20px;border-left:3px solid var(--accent);background:var(--soft);font-size:14px}.rv-problem{padding:8px 0 24px;border-bottom:1px solid var(--line)}.rv-tabs{display:flex;flex-wrap:wrap;gap:8px;padding:24px 0}button{font:inherit;cursor:pointer;color:var(--ink);border:1px solid var(--line);background:var(--panel);padding:9px 16px;border-radius:5px}button[aria-pressed=true]{background:var(--accent);color:white}button:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.rv-step{display:grid;grid-template-columns:50px 1fr;gap:12px;padding:20px;border:1px solid var(--line);background:var(--panel);margin:12px 0}.rv-step h3{margin:0;font-size:24px}.rv-step p{margin:8px 0}.rv-step small{color:var(--muted)}pre{white-space:pre-wrap;overflow-wrap:anywhere;padding:24px;background:var(--panel);border:1px solid var(--line);font:14px/1.7 ui-monospace,monospace}.rv-step p,#rv-problem{white-space:pre-wrap;overflow-wrap:anywhere}#rv-graph-scroll{overflow:auto;border:1px solid var(--line);background:var(--panel);padding:16px}#rv-canvas{position:relative}#rv-canvas svg{position:absolute;inset:0;pointer-events:none}#rv-canvas button{position:absolute;width:208px;min-height:94px;text-align:left;overflow-wrap:anywhere;font-size:13px;border-top:3px solid var(--accent)}#rv-canvas button small{display:block;color:var(--muted);margin-top:7px}#rv-canvas button[data-open=true]{border-top-color:#a58154}#rv-node-detail{white-space:pre-wrap;overflow-wrap:anywhere;padding:20px;margin-top:16px;border-left:3px solid var(--accent);background:var(--soft)}footer{padding:28px;text-align:center;color:var(--muted);font-size:13px}[hidden]{display:none!important}@media(prefers-color-scheme:dark){:root{--bg:#141c19;--panel:#1c2822;--ink:#eeeee4;--muted:#b8c3b7;--line:#526457;--accent:#a1c6ac;--soft:#233128}button[aria-pressed=true]{color:#141c19}}@media(max-width:600px){main{padding:20px 16px}.rv-header{gap:12px}.rv-header span{display:none}.rv-tabs button{font-size:13px;padding:8px 10px}.rv-step{grid-template-columns:26px 1fr;padding:14px}}

:root {
  --bg:#ffffff; --panel:#ffffff; --ink:#17212f; --muted:#4c5c70;
  --line:#dfe5ee; --accent:#2563eb; --soft:#edf4ff;
}
#rv-canvas svg > path { stroke:var(--accent); }
#rv-canvas marker path { fill:var(--accent); }
#rv-canvas button[data-open=true] { border-top-color:#b45309; }
@media(prefers-color-scheme:dark) {
  :root { --bg:#111318; --panel:#1c2028; --ink:#f6f8fc; --muted:#b9c2d0; --line:#4b5668; --accent:#82b1ff; --soft:#202c40; }
  button[aria-pressed=true] { color:#111318; }
  #rv-canvas button[data-open=true] { border-top-color:#fbbf24; }
}