/* Screenshot-guided composition. Logical sizes and spacing remain prototype choices. */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.wrap{flex-wrap:wrap}
.conversation>.thread-header{display:flex;align-items:center;gap:5px;padding:0 9px;height:36px;min-height:36px;overflow-x:auto;scrollbar-width:thin}
.thread-header h2{font-size:.8125rem;margin:0;flex:1;min-width:70px;font-weight:400}
.thread-header>.toolbar{display:flex;flex-wrap:nowrap;gap:0;flex-shrink:0}
.thread-header button{padding:2px 4px;min-width:25px;min-height:26px;font-size:.75rem}
.thread-header .icon{width:14px;height:14px}
.thread-header .avatar{width:18px;height:18px;border-width:1px;font-size:8px;margin:0}
.conversation[data-focused=true]>.thread-header{box-shadow:inset 0 1px 0 var(--accent)}
.document-viewport{position:relative;display:flex;flex:1;min-height:0;min-width:0}
.conversation .transcript{padding:22px 28px 24px 42px;scrollbar-width:thin;scrollbar-color:var(--border) transparent;position:relative;overflow:auto;min-width:0}
.conversation .prose{min-height:100%;width:min(var(--prose-width),100%);min-width:calc(28 * var(--prose));padding-right:4px}
.document-block{position:relative;margin:0 0 24px;scroll-margin-top:20px}
.document-block.message{display:flex;gap:12px;margin-bottom:24px}
.turn-avatar{position:absolute;left:-31px;top:0;line-height:var(--line)}
.turn-avatar .avatar{margin:0;width:22px;height:22px;border:1px solid var(--border)}
.turn-content{min-width:0;flex:1}
.message .turn-content p{margin:0 0 12px;line-height:var(--line)}
.message .turn-content p:last-child{margin-bottom:0}
.inline-draft{display:flex;min-height:32px;gap:12px;margin-bottom:32px}
.inline-draft textarea{display:block;width:100%;resize:none;min-height:26px;overflow:hidden;border:0;border-radius:0;background:transparent;padding:0;box-shadow:none;font-size:var(--prose);line-height:var(--line);caret-color:var(--accent)}
.inline-draft textarea:focus-visible{outline:0}
.inline-draft:focus-within>.turn-avatar{filter:brightness(1.15)}
.inline-draft textarea::placeholder{color:var(--muted);opacity:.55;font-size:.75rem}
.conversation>.bottom-bar{height:34px;min-height:34px;flex-shrink:0;display:flex;gap:2px;align-items:center;flex-wrap:nowrap;margin:0;padding:2px 6px;border-top:1px solid var(--border);overflow-x:auto;scrollbar-width:thin;font-size:.625rem}
.bottom-bar>button{min-height:25px;flex-shrink:0;padding:2px 4px;gap:4px;border-radius:3px}
.bottom-bar .icon{height:13px;width:13px}
.bottom-bar .project-control{max-width:100px;min-width:44px;justify-content:flex-start;flex-shrink:1}
.bottom-bar .branch-control{max-width:75px;overflow:hidden;text-overflow:ellipsis;display:block;flex-shrink:1;min-width:34px}
.bottom-bar .send{margin-left:0;min-width:25px}
.bottom-bar button[data-action=model]{max-width:90px;overflow:hidden;text-overflow:ellipsis;display:block}
.bottom-bar>.grow{min-width:0}
.fork-notice{display:flex;align-items:flex-start;gap:12px;background:color-mix(in srgb,var(--accent) 5%,var(--editor));padding:8px 12px 8px 30px;font-size:.6875rem;flex-shrink:0}
.fork-notice>div{flex:1;min-width:0}
.fork-notice strong{font-size:.6875rem;font-weight:400}
.fork-notice p{color:var(--muted);font-size:.625rem;margin:4px 0 0;line-height:1.5}
.fork-notice>button{min-height:20px;padding:0 3px;color:var(--muted)}
.fork-origin,.routing-row,.completion-row{font-size:.8125rem;line-height:1.5;color:var(--muted)}
.fork-origin{display:flex;align-items:baseline;gap:4px;flex-wrap:wrap}
.fork-origin>.avatar{position:absolute;left:-31px;top:0;margin:0}
.document-link{font:inherit;display:inline;padding:0;min-height:0;white-space:normal;text-align:left;text-decoration:underline;text-underline-offset:2px;color:var(--muted);vertical-align:baseline;border-radius:0}
.document-link:hover{color:var(--accent);background:transparent}
.simulation-note{font-size:.5625rem;opacity:.6;margin-left:6px}
.activity-run{color:var(--muted);font-size:.8125rem;line-height:1.5}
.activity-run>summary{cursor:pointer;list-style:none;display:inline}
.activity-run>summary::-webkit-details-marker{display:none}
.fold-chevron{display:inline-block;margin-left:8px;transition:transform .12s}
.activity-run[open]>summary>.fold-chevron{transform:rotate(90deg)}
.activity-details{padding-top:8px}
.tool-detail{margin:8px 0;color:var(--muted)}
.tool-detail>summary{cursor:pointer;font-size:.75rem}
.tool-detail pre{color:var(--text);font-size:var(--code);line-height:1.5;padding:8px 10px;margin:6px 0;white-space:pre-wrap;overflow-wrap:anywhere;background:var(--surface);border:1px solid var(--border);border-radius:3px}
.tool-detail pre.inline-diff{background:var(--added)}
.inherited-context{font-size:.6875rem;color:var(--muted);margin:0 0 20px;border-bottom:1px solid var(--border);padding-bottom:9px}
.inherited-context summary{cursor:pointer}
.inherited-context p{margin:10px 0;line-height:1.5}
.inherited-preview{border-left:1px solid var(--border);padding-left:10px;max-height:220px;overflow:auto}
.ruler-line{right:0;width:2px;opacity:0;z-index:1}
.prose:hover>.ruler-line,.ruler-line:focus-visible{opacity:.35}
.message-rail{position:absolute;right:0;top:0;bottom:0;width:15px;padding:0 2px;display:flex;align-items:flex-end;background:var(--editor)}
.rail-track{width:100%;height:144px;max-height:70%;margin-bottom:25px;display:flex;flex-direction:column;justify-content:space-between;touch-action:none;cursor:ns-resize}
.rail-marker{padding:0;min-height:12px;height:12px;border:0;width:11px;border-radius:0;display:grid;place-items:center;touch-action:none}
.rail-marker>span{width:6px;height:1px;background:var(--muted);opacity:.5;pointer-events:none}
.rail-marker.end-marker>span{background:var(--accent);opacity:.7}
.rail-marker:hover>span,.rail-marker.selected>span,.rail-marker:focus-visible>span{background:var(--accent);opacity:1;width:9px}
.sidebar .section-label{font-size:.6875rem;color:var(--muted);margin-top:15px}
.sidebar .child-overflow{margin-left:27px;color:var(--muted)}
.sidebar .thread-row{margin-block:0}
.sidebar .thread-row.child{margin-left:12px}
.sidebar .thread-row.child button.main{font-size:.75rem}
.sidebar .thread-row>button:not(.main){opacity:0;min-width:20px;padding-inline:3px}
.sidebar .thread-row:hover>button,.sidebar .thread-row:focus-within>button{opacity:1}
.grammar-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;font-size:.75rem;margin-bottom:14px}
.grammar-controls label{display:flex;align-items:center;justify-content:space-between;gap:5px}
.grammar-controls input{width:58px}
#activity-title-preview{display:block;font-size:.8125rem;color:var(--accent);padding:10px;border:1px solid var(--border);line-height:1.5}
#fork-state,#document-ranges{font-size:.6875rem;line-height:1.5;max-height:240px;overflow:auto;padding:10px;background:var(--editor);white-space:pre-wrap;overflow-wrap:anywhere}
.modal-body h3:not(:first-child){margin-top:20px}
.anchor-highlight{animation:anchor-flash 1.2s ease-out}
@keyframes anchor-flash{from{background:color-mix(in srgb,var(--accent) 18%,transparent)}to{background:transparent}}
@media(max-width:950px){.conversation>.thread-header{padding-inline:6px}.conversation .transcript{padding:20px 22px 20px 38px}.grammar-controls{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(prefers-reduced-motion:reduce){.anchor-highlight{animation:none;outline:1px solid var(--accent)}.fold-chevron{transition:none}}