.groot-architecture{--gta-accent:var(--accent,#725387);margin:30px 0;background:var(--surface,#fffdf8);color:var(--ink,#242224);border:1px solid var(--line,#ddd7cb);border-top:4px solid var(--gta-accent);overflow:hidden}
.groot-architecture *{box-sizing:border-box}
.gta-heading{padding:25px 27px 22px}
.groot-architecture .gta-kicker{display:block;font:700 10px/1.5 var(--sans,sans-serif);text-transform:uppercase;letter-spacing:.11em;color:var(--gta-accent)}
.groot-architecture .gta-heading h3{font:700 35px/1.06 var(--display,sans-serif);margin:9px 0 13px;color:var(--ink)}
.groot-architecture .gta-heading p,.groot-architecture .gta-diagram-heading p,.groot-architecture .gta-detail-heading p{font-size:13px;line-height:1.75;color:var(--muted);margin:0;max-width:67ch}
.gta-mode-buttons{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.groot-architecture .gta-mode-buttons button{appearance:none;border:0;border-radius:0;background:transparent;color:var(--ink);text-align:left;padding:17px 22px;cursor:pointer;font-family:var(--sans,sans-serif);box-shadow:inset 0 -3px transparent;transition:background .15s,box-shadow .15s}
.groot-architecture .gta-mode-buttons button+button{border-left:1px solid var(--line)}
.gta-mode-buttons button b{display:block;font-size:12px;line-height:1.5}
.gta-mode-buttons button>span{display:block;font-size:10px;line-height:1.7;color:var(--muted);margin-top:3px}
.groot-architecture .gta-mode-buttons button[aria-pressed=true]{background:var(--accent-soft);box-shadow:inset 0 -3px var(--gta-accent)}
.groot-architecture .gta-mode-buttons button:hover,.groot-architecture .gta-node:hover{background:var(--surface-soft,var(--accent-soft))}
.groot-architecture button:focus-visible{outline:3px solid var(--gta-accent);outline-offset:-4px}
.gta-diagram{padding:24px 26px 22px;background:var(--surface-soft,var(--accent-soft))}
.groot-architecture .gta-diagram-heading h4,.groot-architecture .gta-detail-heading h4{font:700 26px/1.15 var(--display,sans-serif);margin:7px 0 11px;color:var(--ink)}
.gta-inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:27px;margin-top:23px}
.gta-inputs>div{text-align:center;min-width:0}
.gta-input-label{display:block;font:700 12px/1.5 var(--sans,sans-serif);color:var(--ink)}
.gta-input-note{display:block;font-size:10px;line-height:1.6;color:var(--muted);margin-top:3px}
.gta-input-arrow{display:block;font:500 22px/1.4 var(--sans,sans-serif);color:var(--gta-accent);margin:3px 0}
.gta-policy-grid{display:grid;grid-template-columns:minmax(0,1fr) 27px minmax(0,1fr);align-items:stretch}
.gta-feature-flow{display:grid;place-items:center;font:500 22px/1 var(--sans,sans-serif);color:var(--gta-accent)}
.groot-architecture .gta-node{display:block;appearance:none;width:100%;min-width:0;border:1px solid var(--line);border-radius:0;background:var(--surface);padding:17px 16px 13px;text-align:left;color:var(--ink);font-family:var(--sans,sans-serif);cursor:pointer;transition:background .15s,border-color .15s;position:relative}
.groot-architecture .gta-node[aria-pressed=true]{border-color:var(--gta-accent);box-shadow:inset 0 3px var(--gta-accent);background:var(--accent-soft)}
.gta-node-top{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.gta-node-number{flex:none;display:grid;place-items:center;width:26px;height:26px;border:1px solid var(--line);border-radius:50%;font-size:9px;font-weight:700;color:var(--gta-accent)}
.gta-node-tag{font-size:8px;font-weight:700;line-height:1.5;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.gta-node>strong{display:block;font:700 25px/1.12 var(--display,sans-serif);color:var(--ink);margin-bottom:10px}
.gta-node-brief{display:block;font-size:11px;line-height:1.75;color:var(--muted)}
.gta-node-prompt{display:flex;justify-content:space-between;gap:10px;padding-top:13px;margin-top:13px;border-top:1px solid var(--line);font-size:9px;font-weight:700;line-height:1.6;color:var(--gta-accent)}
.gta-node-prompt>span{font-size:13px}
.gta-command-flow{display:flex;justify-content:center;align-items:center;gap:9px;padding:12px 0;font-size:10px;color:var(--muted);line-height:1.6}
.gta-command-flow>span:first-child{font-size:22px;line-height:1;color:var(--gta-accent)}
.groot-architecture .gta-execution-node{padding:16px 19px 12px}
.gta-execution-node .gta-node-top{margin-bottom:10px}
.gta-execution-node>strong{font-size:25px;margin-bottom:7px}
.gta-execution-node .gta-node-prompt{padding-top:10px;margin-top:10px}
.gta-feedback,.gta-training-note{display:flex;gap:12px;align-items:flex-start;margin-top:19px;padding-top:15px;border-top:1px dashed var(--gta-accent)}
.gta-feedback>span,.gta-training-note>span{flex:none;font:500 28px/1 var(--sans,sans-serif);color:var(--gta-accent)}
.groot-architecture .gta-feedback p,.groot-architecture .gta-training-note p{font-size:11px;line-height:1.75;margin:0;color:var(--muted)}
.gta-feedback b,.gta-training-note b{color:var(--ink)}
.gta-train-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px;margin-top:23px}
.gta-train-grid>.gta-node:not(:last-child)::after{content:'→';position:absolute;top:50%;left:100%;width:23px;transform:translateY(-50%);font:500 20px/1 var(--sans,sans-serif);color:var(--gta-accent);text-align:center}
.gta-train-grid .gta-node-top{display:block}
.gta-train-grid .gta-node-number{margin-bottom:9px}
.gta-train-grid .gta-node-tag{display:block}
.gta-train-grid .gta-node>strong{font-size:23px}
.gta-detail{padding:24px 27px 26px;border-top:1px solid var(--line)}
.gta-detail-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:19px 25px;margin:23px 0 0}
.gta-detail-grid>div{border-left:2px solid var(--line);padding-left:12px;min-width:0}
.gta-detail-grid dt{font-size:10px;font-weight:700;line-height:1.5;color:var(--gta-accent);margin:0 0 6px}
.gta-detail-grid dd{font-size:11px;line-height:1.8;color:var(--muted);margin:0}
.gta-footer{padding:17px 26px 19px;border-top:1px solid var(--line);background:var(--surface-soft,var(--accent-soft))}
.groot-architecture .gta-footer p{font-size:10px;line-height:1.75;color:var(--muted);margin:0}
.gta-footer b{color:var(--ink)}
.groot-architecture .gta-footer .gta-footnote{font-size:9px;margin-top:8px}
@media(max-width:760px){
  .gta-heading{padding:22px 20px 20px}
  .gta-diagram{padding:22px 20px 20px}
  .gta-detail{padding:22px 21px 24px}
  .gta-footer{padding:16px 20px 18px}
  .groot-architecture .gta-mode-buttons button{padding:15px 17px}
  .gta-train-grid{gap:17px}
  .gta-train-grid>.gta-node:not(:last-child)::after{width:17px;font-size:16px}
  .groot-architecture .gta-train-grid .gta-node{padding:14px 12px 11px}
  .gta-train-grid .gta-node>strong{font-size:21px}
}
@media(max-width:560px){
  .groot-architecture .gta-heading h3{font-size:30px}
  .groot-architecture .gta-heading p,.groot-architecture .gta-diagram-heading p,.groot-architecture .gta-detail-heading p{font-size:12px}
  .groot-architecture .gta-mode-buttons button{padding:14px 13px}
  .gta-mode-buttons button b{font-size:11px}
  .gta-mode-buttons button>span{font-size:9px}
  .gta-inputs{gap:17px}
  .gta-input-label{font-size:10px}
  .gta-input-note{font-size:9px}
  .gta-policy-grid{grid-template-columns:minmax(0,1fr) 17px minmax(0,1fr)}
  .gta-feature-flow{font-size:17px}
  .groot-architecture .gta-policy-grid .gta-node{padding:13px 11px 10px}
  .gta-policy-grid .gta-node-top{display:block}
  .gta-policy-grid .gta-node-number{margin-bottom:7px}
  .gta-policy-grid .gta-node-tag{display:block;font-size:7px}
  .gta-policy-grid .gta-node>strong{font-size:21px}
  .gta-policy-grid .gta-node-brief{font-size:10px}
  .gta-policy-grid .gta-node-prompt{font-size:8px}
  .gta-train-grid{grid-template-columns:1fr;gap:25px}
  .groot-architecture .gta-train-grid .gta-node{padding:16px 15px 12px}
  .gta-train-grid .gta-node-top{display:flex;margin-bottom:10px}
  .gta-train-grid .gta-node-number{margin-bottom:0}
  .gta-train-grid .gta-node>strong{font-size:25px}
  .gta-train-grid>.gta-node:not(:last-child)::after{content:'↓';top:100%;left:50%;width:25px;height:25px;transform:translateX(-50%);display:grid;place-items:center;font-size:18px}
  .gta-detail-grid{grid-template-columns:1fr;gap:17px}
  .groot-architecture .gta-diagram-heading h4,.groot-architecture .gta-detail-heading h4{font-size:24px}
}
@media(prefers-reduced-motion:reduce){.groot-architecture .gta-mode-buttons button,.groot-architecture .gta-node{transition:none}}