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100px);overflow-y:auto;background:#0f141fa6;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);z-index:5;display:flex;flex-direction:column;flex-direction:column-reverse}.history-drawer:before{content:"";position:sticky;top:0;left:0;width:100%;height:60px;background:linear-gradient(180deg,#0f141fe6,#0f141f00);z-index:6;flex-shrink:0;pointer-events:none}.history-content{padding:24px 20px 40px;display:flex;flex-direction:column;gap:16px;justify-content:flex-end}.hist-item{display:flex;gap:12px;font-size:14px;color:#fffffff2;animation:slideUpFade .3s cubic-bezier(.16,1,.3,1) forwards;line-height:1.5}@keyframes slideUpFade{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.hist-item .role{color:#74c0fc;min-width:36px;flex-shrink:0;font-weight:600}.hist-item.assistant .role{color:#ffd43b}.hist-item span:last-child{flex:1;word-break:break-word;background:#ffffff1a;padding:10px 14px;border-radius:4px 12px 12px}.hist-item.user span:last-child{background:#74c0fc26;border-top-left-radius:12px;border-top-right-radius:4px}.control-dock{padding:0 16px 24px;background:transparent;border-top:none;display:flex;align-items:center;justify-content:center;position:absolute;bottom:0;width:100%;z-index:10;pointer-events:none}.dock{display:flex;align-items:center;gap:20px;justify-content:center;background:#ffffff40;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);padding:12px 24px;border-radius:999px;box-shadow:0 8px 32px #00000026,inset 0 1px 1px #fff6;pointer-events:auto}.icon-btn{width:48px;height:48px;border-radius:50%;border:none;background:#ffffffd9;color:#314056;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .25s cubic-bezier(.34,1.56,.64,1);box-shadow:0 4px 12px #00000014,inset 0 1px #fffc}.icon-btn:hover:not(:disabled){background:#fff;transform:scale(1.05) translateY(-2px);box-shadow:0 6px 16px #0000001f,inset 0 1px #fff}.icon-btn:active:not(:disabled){transform:scale(.95)}.icon-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.icon-btn.muted{background:#ffe6e6f2;color:#e03131}.icon-btn.muted:hover:not(:disabled){background:#ffdbdb}.icon-btn.active{background:#deeefff2;color:#1864ab}.call-btn{width:64px;height:64px;border-radius:50%;border:none;background:linear-gradient(135deg,#2fd38a,#13b46f);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s cubic-bezier(.34,1.56,.64,1);box-shadow:inset 0 2px #ffffff4d,0 8px 24px #18b26959}.call-btn:hover:not(:disabled){transform:scale(1.05) translateY(-2px);box-shadow:inset 0 2px #fff6,0 12px 28px #18b26973}.call-btn:active:not(:disabled){transform:scale(.95)}.call-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.call-btn.active{background:linear-gradient(135deg,#ff6b6b,#e03131);box-shadow:0 8px 24px #e0313159}.call-btn.active:hover{box-shadow:0 12px 28px #e0313173}.history-list{padding:12px 16px;display:flex;flex-direction:column;gap:10px}.history-item{display:flex;gap:8px;font-size:13px;color:#ffffffe6;line-height:1.5}.history-item .role{min-width:36px;flex-shrink:0;color:#74c0fc}.history-item.assistant .role{color:#ffd43b}.history-item .text{flex:1;word-break:break-word}.error-toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);padding:12px 20px;background:#ff6b6b;color:#fff;border-radius:8px;font-size:14px;box-shadow:0 4px 12px #0003;z-index:100}@media (max-width: 480px){body{padding:0}#root{max-width:100%}.app-shell{grid-template-columns:1fr;gap:0}.demo-column{padding:16px}.device-summary-grid{grid-template-columns:1fr}.video-card{border-radius:0;min-height:100vh}.video-stage{flex:1;min-height:0}.video-image,.video-active{top:0;right:0;bottom:0;left:0}.dock{gap:12px;padding:10px 20px}.icon-btn{width:44px;height:44px}.call-btn{width:56px;height:56px}}