.history-layout{grid-template-columns:258px minmax(0,1fr);align-items:start;min-width:0;display:grid}.history-layout-content{min-width:0}.history-layout:has(.studio-page){height:100%;min-height:0}.history-layout:has(.studio-page) .history-layout-content{height:100%;min-height:0}.history-sidebar{background:#f8faf9;border-right:1px solid #e0e5e6;flex-direction:column;min-width:0;height:calc(100dvh - 57px);min-height:420px;padding:18px 12px;display:flex;position:sticky;top:57px}.history-heading{justify-content:space-between;align-items:center;gap:10px;padding:0 7px 14px;display:flex}.history-heading h2{margin:4px 0 0;font-size:19px}.history-heading button{color:#63706e;cursor:pointer;background:#fff;border:1px solid #dde3e3;border-radius:9px;place-items:center;width:30px;height:30px;display:grid}.history-heading button:disabled{opacity:.5;cursor:wait}.history-heading svg{width:15px;height:15px}.history-new{color:#fff;background:#273850;border-radius:11px;align-items:center;gap:8px;margin-bottom:12px;padding:11px 12px;font-size:13px;font-weight:750;display:flex}.history-new svg{width:16px;height:16px}.history-list{overscroll-behavior:contain;flex:1;min-height:0;overflow-y:auto}.history-list ul{margin:0;padding:0;list-style:none}.history-list li+li{margin-top:4px}.history-list a{color:#29364a;border:1px solid #0000;border-radius:10px;flex-direction:column;gap:5px;padding:11px 10px;display:flex}.history-list a:hover,.history-list a.active{background:#fff;border-color:#d7dce9}.history-list strong{text-overflow:ellipsis;white-space:nowrap;font-size:13px;font-weight:700;overflow:hidden}.history-list time,.history-tool{color:#7e8996;font-size:11px}.history-tool{color:#9b4381;font-weight:750}.history-state{color:#758192;align-items:center;gap:8px;margin:8px 6px;font-size:12px;line-height:1.5;display:flex}.history-error{color:#a62836}.history-spinner{border:2px solid #c8d6d2;border-top-color:#2a7561;border-radius:50%;flex:none;width:17px;height:17px;animation:.8s linear infinite history-spin;display:inline-block}@keyframes history-spin{to{transform:rotate(360deg)}}.chat-shell>.history-sidebar{height:100%;min-height:0;position:static}.chat-history-loading{color:#7e8996;flex-direction:column;justify-content:center;align-items:center;gap:10px;min-height:100%;font-size:13px;display:flex}.chat-history-loading .history-spinner{border-width:3px;width:32px;height:32px}@media (max-width:1100px){.history-layout{grid-template-columns:220px minmax(0,1fr)}.history-sidebar{height:calc(100dvh - 102px);top:102px}}@media (max-width:820px){.history-layout{display:block}.history-sidebar,.chat-shell>.history-sidebar{border-bottom:1px solid #e0e5e6;border-right:0;height:auto;min-height:0;max-height:280px;position:static}.history-list{overflow-y:auto}}