:root{color-scheme:light dark;--bg: #f5f6f8;--bg-elevated: #ffffff;--text: #1a1d23;--text-dim: #62676f;--border: #d8dbe0;--accent: #2f6fed;--accent-contrast: #ffffff;--danger: #e0402f;--high: #c23b22;--medium: #b8860b;--low: #4a7a4a;--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace}@media (prefers-color-scheme: dark){:root{--bg: #0b0d12;--bg-elevated: #161922;--text: #e8eaed;--text-dim: #93989f;--border: #2a2e38;--accent: #6ea8ff;--accent-contrast: #0b0d12;--high: #ff8a75;--medium: #f0c05a;--low: #7fd68a}}*{box-sizing:border-box}html,body{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif}button,input,select,textarea{font:inherit;color:inherit}#app{display:grid;grid-template-columns:240px 1fr 340px;grid-template-rows:1fr;height:100dvh}.pane{min-width:0;min-height:0;overflow-y:auto;border-right:1px solid var(--border)}.pane:last-child{border-right:none}.pane-header{position:sticky;top:0;background:var(--bg-elevated);border-bottom:1px solid var(--border);padding:10px 12px;font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:8px;z-index:1}.conversation-controls{display:flex;align-items:center;gap:6px;min-width:0}.conversation-select{max-width:160px;padding:4px 6px;border-radius:6px;border:1px solid var(--border);background:var(--bg);font:inherit;font-size:12px}#file-explorer .tree{padding:6px;font-size:13px}#file-explorer .tree-item{padding:4px 8px;border-radius:6px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-family:var(--mono)}#file-explorer .tree-item:hover{background:var(--bg-elevated)}#file-explorer .tree-item.active{background:var(--accent);color:var(--accent-contrast)}#file-explorer .empty,#file-explorer .drop-zone{margin:12px;padding:20px 12px;border:1px dashed var(--border);border-radius:10px;text-align:center;font-size:12px;color:var(--text-dim)}#file-explorer .drop-zone.dragover{border-color:var(--accent);color:var(--accent)}#file-explorer .actions{display:flex;gap:6px;padding:6px;flex-wrap:wrap}#editor-chat{display:flex;flex-direction:column}#editor-host{flex:1 1 40%;min-height:0;overflow:auto;border-bottom:1px solid var(--border)}#editor-host .cm-editor{height:100%}#editor-host .placeholder{padding:20px;color:var(--text-dim);font-size:13px}#chat-pane{flex:1 1 60%;display:flex;flex-direction:column;min-height:0}#chat-messages{flex:1 1 auto;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:10px}.msg{max-width:90%;padding:10px 12px;border-radius:12px;font-size:14px;line-height:1.5}.msg.user{align-self:flex-end;background:var(--accent);color:var(--accent-contrast)}.msg.assistant{align-self:flex-start;background:var(--bg-elevated);border:1px solid var(--border)}.msg pre{background:#7f7f7f1f;border-radius:8px;padding:8px;overflow-x:auto;font-family:var(--mono);font-size:12.5px}.msg .apply-diff-btn{margin-top:6px;font-size:12px;padding:4px 10px;border-radius:6px;border:1px solid var(--border);background:var(--bg);cursor:pointer}#chat-input-bar{display:flex;gap:8px;padding:8px;border-top:1px solid var(--border);background:var(--bg-elevated)}#chat-input-bar textarea{flex:1;resize:none;min-height:40px;max-height:160px;border-radius:10px;border:1px solid var(--border);background:var(--bg);padding:8px 10px;font-size:14px}#chat-input-bar .btn-col{display:flex;flex-direction:column;gap:4px}.btn{border-radius:8px;border:1px solid var(--border);background:var(--bg-elevated);padding:8px 14px;font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap}.btn.primary{background:var(--accent);color:var(--accent-contrast);border-color:var(--accent)}.btn.subtle{background:transparent;border-color:transparent;color:var(--text-dim)}.btn:disabled{opacity:.5;cursor:default}#optimization-panel{font-size:13px}#api-key-bar{padding:10px;border-bottom:1px solid var(--border);display:flex;gap:6px}#api-key-bar input{flex:1;min-width:0;padding:6px 8px;border-radius:8px;border:1px solid var(--border);background:var(--bg)}.opt-group{margin-bottom:14px;border:1px solid var(--border);border-radius:10px;overflow:hidden}.opt-group-header{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;background:var(--bg-elevated);font-weight:700}.opt-stage{padding:8px 10px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:4px}.opt-stage-row{display:flex;align-items:center;justify-content:space-between;gap:8px}.opt-stage-title{display:flex;align-items:center;gap:6px;font-weight:600}.badge{font-size:10px;font-weight:700;padding:1px 6px;border-radius:999px;border:1px solid currentColor}.badge.high{color:var(--high)}.badge.medium{color:var(--medium)}.badge.low{color:var(--low)}.badge.stub{color:var(--text-dim);border-style:dashed}.opt-stage-desc{color:var(--text-dim);font-size:12px}.opt-params{display:flex;flex-direction:column;gap:6px;margin-top:4px;padding-left:4px}.opt-param-row{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12px}.opt-param-row input[type=number]{width:80px;padding:3px 6px;border-radius:6px;border:1px solid var(--border);background:var(--bg)}.opt-template-row textarea,.opt-template-row input[type=text]{width:100%;padding:5px 8px;border-radius:6px;border:1px solid var(--border);background:var(--bg);resize:vertical}.opt-template-row.new{gap:6px}.opt-template-row code{font-size:12px}.switch{position:relative;width:38px;height:22px;flex:0 0 auto}.switch input{position:absolute;inset:0;opacity:0;margin:0;cursor:pointer;z-index:1}.switch .track{position:absolute;inset:0;background:var(--border);border-radius:999px;transition:background .15s;pointer-events:none}.switch input:checked+.track{background:var(--accent)}.switch .thumb{position:absolute;top:2px;left:2px;width:18px;height:18px;border-radius:50%;background:#fff;transition:transform .15s;pointer-events:none}.switch input:checked~.thumb{transform:translate(16px)}#token-budget-readout{padding:8px 10px;background:var(--bg-elevated);border-radius:10px;border:1px solid var(--border);margin-bottom:10px;font-size:12px}#token-budget-readout .value{font-size:18px;font-weight:700}#context-health{padding:8px 10px;background:var(--bg-elevated);border-radius:10px;border:1px solid var(--border);margin-bottom:10px;font-size:12px}#context-health .pane-header{padding:0 0 4px!important;background:none!important;border:none!important;position:static!important;font-size:13px}#context-health .value{font-size:18px;font-weight:700}#context-health .opt-stage-desc,#context-health .opt-param-row{margin:6px 0}#context-health #trim-context-btn{width:100%;margin-top:4px;border:1px solid var(--border)}.context-health-bar{height:6px;border-radius:999px;background:var(--border);overflow:hidden;margin-top:6px}.context-health-bar-fill{height:100%;border-radius:999px;transition:width .2s}#session-dashboard{padding:8px 10px;background:var(--bg-elevated);border-radius:10px;border:1px solid var(--border);margin-bottom:10px}#session-dashboard .grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;font-size:12px}#session-dashboard .stat .label{color:var(--text-dim)}#session-dashboard .stat .value{font-weight:700}#pre-send-inspector{margin-bottom:10px}#pre-send-inspector summary{cursor:pointer;font-weight:600;padding:6px 0}#pre-send-inspector .stage-report{display:flex;justify-content:space-between;font-size:12px;padding:3px 0;border-bottom:1px dashed var(--border)}#pre-send-inspector pre{max-height:240px;overflow:auto;background:#7f7f7f1a;padding:8px;border-radius:8px;font-size:11px}@media (max-width: 900px){#app{grid-template-columns:1fr;grid-template-rows:auto}#app.view-explorer #editor-chat,#app.view-explorer #optimization-panel,#app.view-chat #file-explorer,#app.view-chat #optimization-panel,#app.view-optimize #file-explorer,#app.view-optimize #editor-chat{display:none}.pane{border-right:none}#mobile-tabbar{display:flex;border-top:1px solid var(--border);background:var(--bg-elevated)}#mobile-tabbar button{flex:1;padding:10px;background:none;border:none;font-size:12px;color:var(--text-dim)}#mobile-tabbar button.active{color:var(--accent);font-weight:700}}@media (min-width: 901px){#mobile-tabbar{display:none}}