.switch-computer{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--surface,#FFFFFF);border:1px solid var(--line);border-radius:10px;margin-bottom:10px;color:var(--text-2);text-decoration:none;position:relative;overflow:hidden;cursor:pointer;transition:border-color .2s ease}.switch-computer:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(124,92,252,.08) 20%,rgba(124,92,252,.12) 50%,rgba(124,92,252,.08) 80%,transparent);transform:translateX(-100%);transition:transform .4s cubic-bezier(.22,.9,.2,1);pointer-events:none}.switch-computer:hover:before{transform:translateX(0)}.switch-computer:hover{border-color:rgba(124,92,252,.3)}.switch-computer:after{content:"";position:absolute;inset:0;border-radius:10px;box-shadow:inset 0 0 0 1px rgba(124,92,252,0);transition:box-shadow .3s ease;pointer-events:none}.switch-computer:hover:after{box-shadow:inset 0 0 0 1px rgba(124,92,252,.15)}.switch-computer:active{transform:scale(.98);transition:transform .1s ease}.switch-computer:active:before{background:linear-gradient(90deg,rgba(124,92,252,.06),rgba(124,92,252,.14) 50%,rgba(124,92,252,.06));transform:translateX(0)}.switch-computer-icon{display:grid;place-items:center;color:var(--violet-deep);transition:transform .2s ease}.switch-computer:hover .switch-computer-icon{transform:scale(1.05)}.switch-computer-text{display:flex;flex-direction:column;flex:1}.switch-computer-label{font-size:9.5px;color:var(--muted);letter-spacing:.12em;text-transform:uppercase}.switch-computer-title{font-size:13px;font-weight:500;color:var(--text);transition:color .2s ease}.switch-computer:hover .switch-computer-title{color:var(--violet-deep)}.switch-computer-arrow{color:var(--ink-4,#9A8F8B);transition:transform .2s ease,color .2s ease}.switch-computer:hover .switch-computer-arrow{transform:translate(2px,-2px);color:var(--violet-deep)}.new-chat-container{position:relative;margin-bottom:14px;z-index:20}.new-chat-btn{display:flex;align-items:center;justify-content:space-between;width:100%;padding:10px 12px;background:var(--violet);color:#fff;border:none;border-radius:10px;font-size:13px;font-weight:500;font-family:inherit;cursor:pointer;box-shadow:0 1px 0 rgba(0,0,0,.04);transition:background .15s ease,transform .1s ease,border-radius .2s ease}.new-chat-btn:hover{background:var(--violet-deep)}.new-chat-btn:active{transform:scale(.98)}.new-chat-container.is-expanded .new-chat-btn{border-radius:10px 10px 0 0}.new-chat-left{display:inline-flex;align-items:center;gap:8px}.new-chat-kbd{font-size:10px;padding:2px 6px;background:rgba(255,255,255,.18);border-radius:6px;color:rgba(255,255,255,.9)}.session-tree{position:absolute;top:100%;left:0;right:0;background:var(--surface);border:1px solid var(--line);border-top:none;border-radius:0 0 10px 10px;overflow:hidden;max-height:0;opacity:0;transform:translateY(-4px);transition:max-height .25s cubic-bezier(.22,.9,.2,1),opacity .2s ease,transform .2s ease;z-index:10;box-shadow:0 4px 12px rgba(0,0,0,.08);pointer-events:none}.session-tree.is-visible{max-height:320px;opacity:1;transform:translateY(0);pointer-events:auto}.session-tree-header{display:flex;align-items:center;justify-content:space-between;padding:8px 12px 6px;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--line)}.session-tree-all{font-size:10px;color:var(--violet-deep);text-decoration:none;letter-spacing:0;text-transform:none;font-weight:500}.session-tree-all:hover{text-decoration:underline}.session-tree-loading{display:flex;align-items:center;justify-content:center;gap:4px;padding:16px}.session-tree-dot{width:4px;height:4px;border-radius:50%;background:var(--violet);animation:session-dot-pulse 1s ease-in-out infinite}.session-tree-dot:nth-child(2){animation-delay:.15s}.session-tree-dot:nth-child(3){animation-delay:.3s}@keyframes session-dot-pulse{0%,to{opacity:.3;transform:scale(.8)}50%{opacity:1;transform:scale(1)}}.session-tree-empty{padding:16px 12px;font-size:12px;color:var(--muted);text-align:center}.session-tree-item{display:flex;align-items:center;gap:8px;padding:8px 12px;text-decoration:none;color:var(--text-2);font-size:12px;transition:background .12s ease;animation:session-item-in .2s ease both}@keyframes session-item-in{0%{opacity:0;transform:translateX(-8px)}to{opacity:1;transform:translateX(0)}}.session-tree-item:hover{background:var(--violet-tint);color:var(--text)}.session-tree-icon{display:grid;place-items:center;color:var(--ink-4);flex-shrink:0}.session-tree-item:hover .session-tree-icon{color:var(--violet-deep)}.session-tree-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:450}.session-tree-time{flex-shrink:0;font-size:10px;color:var(--muted);font-variant-numeric:tabular-nums}