:root{color-scheme:dark;--bg:#09121c;--panel:#101e2b;--line:#293b4c;--text:#eaf3fa;--muted:#a5b8c7;--accent:#5ee0c4;font-family:system-ui,-apple-system,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:16px;line-height:1.55}.shell{max-width:1080px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:24px}.brand{display:flex;align-items:center;gap:14px;color:var(--text);text-decoration:none;letter-spacing:1px;font-size:22px}.brand small{display:block;font-size:13px;letter-spacing:0;color:var(--muted);font-weight:400}.mark{color:var(--accent);background:#132e32;padding:5px 10px;border-radius:8px;font-family:monospace}.learning,a{color:var(--accent)}.learning{font-size:14px}nav{display:flex;border-bottom:1px solid var(--line);gap:4px;margin-bottom:24px}button,input,select{font:inherit}button{background:#162838;color:var(--text);border:1px solid var(--line);border-radius:8px;padding:10px 16px;cursor:pointer;min-height:44px}button:hover{border-color:var(--accent)}button.active{background:#173932;color:var(--accent);border-color:#366957}nav button{border:0;background:none;border-radius:0;padding:12px 16px}nav button.active{border-bottom:2px solid var(--accent);background:none}button:disabled{opacity:.6;cursor:default}input,select{width:100%;background:#0b1722;color:var(--text);border:1px solid var(--line);border-radius:8px;padding:12px;min-width:0}input:focus,select:focus,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.search{font-size:18px;padding:17px}.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.toolbar select{width:auto;flex:1}.chips{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.chips button{padding:6px 12px;font-size:14px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.card,.workspace{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:20px;min-width:0}.card summary{cursor:pointer;list-style:none}.card summary::after{content:'+';float:right;color:var(--accent)}.card[open] summary::after{content:'−'}.card h2{font-size:18px;display:inline;margin:0}.card[open]{grid-column:1/-1}.meta,small{font-size:14px;color:var(--muted)}.meta{margin:5px 0 12px}.tag{font-size:12px;text-transform:uppercase;letter-spacing:1px;color:var(--accent)}h1{font-size:27px;line-height:1.3;margin:0 0 16px}h2{font-size:21px;line-height:1.4}h3{font-size:17px}p{margin:10px 0 16px}.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:18px 0 8px}.tabs button{font-size:14px;padding:7px 12px}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#07111a;border-left:3px solid var(--accent);padding:16px;border-radius:6px;font:15px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;margin:12px 0}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;overflow-wrap:anywhere}.note{padding:12px;border-left:3px solid #ffbb65;background:#332819;border-radius:4px;font-size:14px}.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}.primary{background:var(--accent);color:#09201a;border-color:var(--accent);font-weight:650}.empty{padding:30px;text-align:center;color:var(--muted)}footer{margin-top:32px;color:var(--muted);font-size:12px}.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.compare>div{border:1px solid var(--line);padding:12px;border-radius:8px}.options{display:grid;gap:10px}.options button{text-align:left}.feedback{margin:16px 0;padding:14px;border-radius:8px;background:#1c3431}.feedback.bad{background:#422a2c}.progress{height:4px;background:#243644;border-radius:5px;margin:15px 0}.progress>div{background:var(--accent);height:100%}.node{border:1px solid var(--line);border-radius:8px;padding:14px;margin:8px 0;background:#122536}.node.selected{border-color:var(--accent)}.node small{display:block}.check{display:flex;gap:10px;align-items:flex-start;margin:12px 0}.check input{width:20px;min-height:20px;margin-top:4px;accent-color:var(--accent)}.inline{display:flex;gap:12px;align-items:end;flex-wrap:wrap}.inline label{flex:1;min-width:110px}.inline label span{display:block;font-size:14px;color:var(--muted);margin-bottom:5px}.terminal{background:#051018;padding:16px;border-radius:8px;font-family:monospace;min-height:180px}.terminal pre{border:0;padding:0;background:none}.terminal input{font-family:monospace}.split{display:grid;grid-template-columns:240px minmax(0,1fr);gap:20px}.steps button{display:block;width:100%;margin-bottom:8px;text-align:left}.result{color:var(--accent)}.vendor-label{display:inline-block;margin:4px 0}hr{border:0;border-top:1px solid var(--line);margin:20px 0}@media(max-width:700px){.shell{padding:18px 14px}.grid,.compare,.split{grid-template-columns:1fr}.card,.workspace{padding:16px}nav button{padding:10px 11px;font-size:14px}.brand{font-size:20px}.learning{max-width:100px;text-align:right}.steps{display:flex;overflow:auto;gap:6px}.steps button{min-width:115px;margin:0}.toolbar select{width:100%}h1{font-size:24px}}@media(prefers-reduced-motion:no-preference){button{transition:border-color .15s,background .15s}}
:root textarea{width:100%;background:#07111a;color:var(--text);border:1px solid var(--line);border-radius:8px;padding:14px;font:16px/1.6 ui-monospace,monospace;margin-bottom:12px;resize:vertical}a:focus-visible{outline:2px solid var(--accent)}.nodes{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.nodes .node{flex:1;min-width:90px}.card summary h2{padding-right:10px}

.toolbar>label{flex:1;min-width:0}.toolbar select{max-width:100%}.filter-card{margin:16px 0}.observation-summary{border-top:1px solid var(--line);padding:14px 0}.observation-summary h2{font-size:18px}.options button.active{border-color:var(--accent)}

@media(max-width:700px){.toolbar>label{flex-basis:100%}.toolbar select{width:100%}}

nav{flex-wrap:wrap}a{overflow-wrap:anywhere}