/* Extend /brain's visual identity; no competing shell, palette or portrait. */
body[data-view="rail"] #chat-area> :not(.view-switch):not(#agent-rail-panel){display:none!important}
.agent-rail-panel{flex:1;min-height:0;overflow:auto;padding:24px 28px;scrollbar-width:thin;scrollbar-color:var(--plum) transparent}
.rail-notice{font-size:12px;color:var(--lilac);margin:20px 0 24px;line-height:1.65}
.rail-scope{color:var(--muted);font-size:12px;margin:0 0 24px}
.rail-section{margin:28px 0 0}
.rail-section h3{font-size:14px;font-weight:600;margin:0 0 14px}
.rail-select-label{display:block;font-size:12px;color:var(--lilac);margin-bottom:8px}
.rail-select{width:100%;max-width:100%;color:var(--pearl);background:var(--ink);border:1px solid var(--line);border-radius:12px;padding:11px 12px;font:inherit;font-size:13px}
.rail-select:focus-visible,.rail-receipt summary:focus-visible{outline:2px solid var(--peach);outline-offset:4px}
.rail-steps{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px 8px;padding:0;margin:22px 0}
.rail-steps li{font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding-top:10px;overflow-wrap:anywhere}
.rail-steps li::before{content:"";display:block;width:9px;height:9px;border:1px solid var(--muted);border-radius:50%;margin:-15px 0 9px;background:var(--ink)}
.rail-steps li[aria-current="step"]{color:var(--peach)}
.rail-steps li[aria-current="step"]::before{background:var(--peach);border-color:var(--peach)}
.rail-caption{font-size:12px;color:var(--muted);line-height:1.65;overflow-wrap:anywhere}
.rail-section details{border-bottom:1px solid var(--line);padding:13px 0}
.rail-section summary{cursor:pointer;font-size:12px;color:var(--lilac);line-height:1.7;overflow-wrap:anywhere}
.rail-section summary:hover{color:var(--peach)}
.rail-section summary time{color:var(--muted);display:block;font-size:11px;margin-left:14px}
.rail-meta{font-size:11px;color:var(--muted);overflow-wrap:anywhere;margin:12px 0;line-height:1.8}
.rail-meta dt{color:var(--lilac);margin-top:8px}.rail-meta dd{margin:0}
.rail-footer{margin-top:28px;border-top:1px solid var(--line);padding-top:18px;font-size:12px;color:var(--muted)}
@media(max-width:860px){.agent-rail-panel{padding:20px 18px}.view-switch{flex-wrap:wrap}.view-switch button{min-height:40px}}