:root{--bg-0: #090d18;--bg-1: #111827;--bg-2: #161b2e;--accent-blue: #4f8bff;--accent-indigo: #6d5ef9;--accent-violet: #7c3aed;--gradient: linear-gradient(135deg, #4f8bff 0%, #6d5ef9 55%, #7c3aed 100%);--gradient-soft: linear-gradient(135deg, rgba(79, 139, 255, .16), rgba(124, 58, 237, .16));--text-0: #ffffff;--text-1: #d1d5db;--text-2: #94a3b8;--glass: rgba(255, 255, 255, .045);--glass-strong: rgba(255, 255, 255, .07);--glass-line: rgba(255, 255, 255, .08);--shadow-sm: 0 4px 16px rgba(0, 0, 0, .25);--shadow-md: 0 12px 40px rgba(0, 0, 0, .35);--shadow-glow: 0 0 40px rgba(109, 94, 249, .35);--r-sm: 12px;--r-md: 16px;--r-lg: 20px;--r-xl: 24px;--s-1: 8px;--s-2: 16px;--s-3: 24px;--s-4: 32px;--s-5: 40px;--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--collapse-duration: .28s}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--text-1);background:var(--bg-0);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;position:relative;overflow:hidden}body:before{content:"";position:fixed;top:-10%;right:-10%;bottom:-10%;left:-10%;background:radial-gradient(1100px 700px at 12% -8%,rgba(79,139,255,.12),transparent 60%),radial-gradient(1000px 650px at 100% 110%,rgba(124,58,237,.14),transparent 60%);animation:auroraDrift 24s var(--ease-out) infinite alternate;pointer-events:none;z-index:0}#root{position:relative;z-index:1}@keyframes auroraDrift{0%{transform:translateZ(0) scale(1)}to{transform:translate3d(2%,-2%,0) scale(1.06)}}::selection{background:#6d5ef959;color:#fff}*::-webkit-scrollbar{width:10px;height:10px}*::-webkit-scrollbar-thumb{background:#ffffff14;border-radius:999px;border:3px solid transparent;background-clip:content-box}*::-webkit-scrollbar-thumb:hover{background:#ffffff29;background-clip:content-box}button{font-family:inherit;cursor:pointer}.app{display:grid;grid-template-columns:288px 1fr;grid-template-rows:minmax(0,1fr);height:100vh;padding:var(--s-2);gap:var(--s-2);transition:grid-template-columns var(--collapse-duration) var(--ease-out);animation:appIn .5s var(--ease-out) both}.app.app--collapsed{grid-template-columns:92px 1fr}@keyframes appIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.sidebar{display:flex;flex-direction:column;min-height:0;gap:var(--s-2);padding:var(--s-2);border-radius:var(--r-xl);background:linear-gradient(180deg,var(--bg-1) 0%,var(--bg-2) 100%);border:1px solid var(--glass-line);box-shadow:var(--shadow-md);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);transition:padding var(--collapse-duration) var(--ease-out)}.brand-card{display:flex;align-items:center;gap:var(--s-2);padding:var(--s-2);border-radius:var(--r-md);background:var(--glass);border:1px solid var(--glass-line)}.brand-meta{display:flex;flex-direction:column;gap:6px;min-width:0}.brand-name{font-size:1.15rem;font-weight:700;letter-spacing:-.01em;color:var(--text-0)}.sidebar-toggle{align-self:flex-end;display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--glass-line);border-radius:999px;background:var(--glass-strong);color:var(--text-1);box-shadow:var(--shadow-sm);transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .15s var(--ease-out)}.sidebar-toggle:hover{color:var(--text-0);border-color:#6d5ef980;box-shadow:0 0 0 4px #6d5ef929,var(--shadow-sm)}.sidebar-toggle:active{transform:scale(.9)}.sidebar-toggle__icon{transition:transform var(--collapse-duration) var(--ease-out)}.sidebar-toggle__icon.is-flipped{transform:rotate(180deg)}.lang-switcher{position:relative;display:flex;gap:4px;padding:4px;overflow:hidden;border-radius:var(--r-md);background:var(--glass);border:1px solid var(--glass-line);transition:opacity var(--collapse-duration) var(--ease-out),max-width var(--collapse-duration) var(--ease-out),margin var(--collapse-duration) var(--ease-out)}.lang-switcher__indicator{position:absolute;top:4px;bottom:4px;left:4px;width:calc((100% - 8px) / 3);border-radius:var(--r-sm);background:var(--gradient-soft);box-shadow:inset 0 0 0 1px #6d5ef947;transform:translate(calc(var(--active-index, 0) * 100%));transition:transform .3s var(--ease-out)}.lang-btn{position:relative;z-index:1;flex:1;padding:7px 0;border:none;border-radius:var(--r-sm);background:transparent;color:var(--text-2);font-size:.74rem;font-weight:600;letter-spacing:.02em;transition:background .18s ease,color .18s ease,transform .15s var(--ease-out)}.lang-btn:hover{color:var(--text-0)}.lang-btn:active{transform:scale(.93)}.lang-btn.is-active{color:var(--text-0)}.lang-flyout-wrap{display:none}.lang-collapsed-trigger{width:100%;padding:10px 0;border:1px solid var(--glass-line);border-radius:var(--r-sm);background:var(--glass);color:var(--text-1);font-size:.7rem;font-weight:700;letter-spacing:.03em;transition:background .18s ease,color .18s ease,transform .15s var(--ease-out)}.lang-collapsed-trigger:hover{background:var(--glass-strong);color:var(--text-0)}.lang-collapsed-trigger:active{transform:scale(.94)}.lang-flyout{position:fixed;z-index:1000;display:flex;flex-direction:column;gap:4px;min-width:96px;padding:6px;border-radius:var(--r-md);background:linear-gradient(180deg,var(--bg-1) 0%,var(--bg-2) 100%);border:1px solid var(--glass-line);box-shadow:var(--shadow-md);animation:flyoutIn .16s var(--ease-out) both}@keyframes flyoutIn{0%{opacity:0;transform:translate(-4px)}to{opacity:1;transform:translate(0)}}.lang-flyout-btn{padding:8px 10px;border:none;border-radius:var(--r-sm);background:transparent;color:var(--text-2);font-size:.82rem;font-weight:600;text-align:left;transition:background .18s ease,color .18s ease}.lang-flyout-btn:hover{color:var(--text-0);background:var(--glass-strong)}.lang-flyout-btn.is-active{color:var(--text-0);background:var(--gradient-soft);box-shadow:inset 0 0 0 1px #6d5ef947}.nav{display:flex;flex-direction:column;gap:4px}.nav-item{display:flex;align-items:center;gap:var(--s-2);width:100%;padding:11px var(--s-2);border:none;border-radius:var(--r-sm);background:transparent;color:var(--text-2);font-size:.9rem;font-weight:500;text-align:left;overflow:hidden;transition:background .18s ease,color .18s ease,transform .15s var(--ease-out),gap var(--collapse-duration) var(--ease-out),padding var(--collapse-duration) var(--ease-out)}.nav-item svg{flex-shrink:0;opacity:.9;transition:transform .18s ease}.nav-item:hover{color:var(--text-0);background:var(--glass)}.nav-item:hover svg{transform:scale(1.08)}.nav-item:active{transform:scale(.97)}.nav-item.is-active{color:var(--text-0);background:var(--gradient-soft);box-shadow:inset 0 0 0 1px #6d5ef947;animation:navPop .3s var(--ease-out)}.nav-item.is-active svg{color:var(--accent-blue)}@keyframes navPop{0%{transform:scale(.94)}60%{transform:scale(1.015)}to{transform:scale(1)}}.new-chat{display:inline-flex;align-items:center;justify-content:center;gap:var(--s-1);padding:13px;border:none;border-radius:var(--r-md);color:#fff;font-size:.92rem;font-weight:600;overflow:hidden;background:var(--gradient);background-size:200% 200%;box-shadow:0 8px 24px #6d5ef966;transition:transform .2s ease,box-shadow .2s ease,background-position .6s ease,gap var(--collapse-duration) var(--ease-out),padding var(--collapse-duration) var(--ease-out)}.new-chat:hover{transform:translateY(-2px);background-position:100% 0;box-shadow:0 12px 32px #6d5ef98c}.new-chat:active{transform:translateY(0) scale(.97)}.profile-card{display:flex;align-items:center;gap:var(--s-2);padding:10px var(--s-2);border-radius:var(--r-md);background:var(--glass);border:1px solid var(--glass-line);transition:background .18s ease,gap var(--collapse-duration) var(--ease-out),padding var(--collapse-duration) var(--ease-out)}.profile-card:hover{background:var(--glass-strong)}.profile-card:active{transform:scale(.98)}.profile-avatar{width:38px;height:38px;flex-shrink:0;border-radius:50%;display:grid;place-items:center;font-weight:700;color:#fff;background:var(--gradient)}.profile-meta{display:flex;flex-direction:column;gap:2px;min-width:0;flex:1;max-width:200px;opacity:1;overflow:hidden;transition:opacity var(--collapse-duration) var(--ease-out),max-width var(--collapse-duration) var(--ease-out)}.profile-name{font-size:.88rem;font-weight:600;color:var(--text-0);white-space:nowrap}.profile-plan{font-size:.7rem;color:var(--text-2);white-space:nowrap}.profile-dot{width:8px;height:8px;border-radius:50%;background:#34d399;flex-shrink:0;box-shadow:0 0 8px #34d399b3;transition:opacity var(--collapse-duration) var(--ease-out),transform var(--collapse-duration) var(--ease-out),width var(--collapse-duration) var(--ease-out)}.brand-card{transition:padding var(--collapse-duration) var(--ease-out),gap var(--collapse-duration) var(--ease-out)}.brand-meta{max-width:200px;opacity:1;overflow:hidden;transition:opacity var(--collapse-duration) var(--ease-out),max-width var(--collapse-duration) var(--ease-out)}.nav-item span,.new-chat span{display:inline-block;max-width:160px;opacity:1;overflow:hidden;white-space:nowrap;transition:opacity var(--collapse-duration) var(--ease-out),max-width var(--collapse-duration) var(--ease-out)}.sidebar.is-collapsed{padding:var(--s-2) 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var(--s-4)}.chat-header__title{display:block;min-width:0;max-width:100%;font-size:.85rem;font-weight:600;color:var(--text-1);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;animation:titleIn .35s var(--ease-out) both}@keyframes titleIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.list-panel{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}.list-panel__header{display:flex;align-items:center;gap:var(--s-1);padding:var(--s-2) var(--s-3);border-bottom:1px solid var(--glass-line)}.list-panel__back{display:inline-flex;align-items:center;flex-shrink:0;gap:4px;padding:6px 10px;border:1px solid var(--glass-line);border-radius:999px;background:var(--glass);color:var(--text-2);font-size:.72rem;font-weight:600;white-space:nowrap;transition:background .18s ease,color .18s ease}.list-panel__back:hover{color:var(--text-0);background:var(--glass-strong)}.list-panel__actions{display:flex;align-items:center;flex-shrink:0;gap:8px;margin-left:auto}.list-panel__upload{display:inline-flex;align-items:center;flex-shrink:0;gap:5px;padding:7px 12px;border:none;border-radius:999px;color:#fff;font-size:.72rem;font-weight:600;white-space:nowrap;background:var(--gradient);box-shadow:0 4px 14px #6d5ef959;transition:transform .18s ease,box-shadow .18s ease,opacity .18s ease}.list-panel__upload:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 8px 20px #6d5ef980}.list-panel__upload:active:not(:disabled){transform:translateY(0) scale(.96)}.list-panel__upload:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}.list-panel__notice{margin:0;padding:10px var(--s-4);font-size:.82rem;border-bottom:1px solid var(--glass-line);color:var(--text-1)}.list-panel__notice--error{color:#fbbf24}.list-panel__notice--success{color:#34d399}.list-panel__body{flex:1;overflow-y:auto;padding:var(--s-2) var(--s-4) var(--s-4);display:flex;flex-direction:column;gap:6px}.list-panel__body:has(>.list-panel__note){justify-content:center;align-items:center}.list-panel__note{padding:var(--s-3);text-align:center;color:var(--text-2);font-size:.9rem}.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}.skeleton-list{display:flex;flex-direction:column;gap:6px}.skeleton-row{height:52px;border-radius:var(--r-md);background:linear-gradient(90deg,var(--glass) 25%,var(--glass-strong) 50%,var(--glass) 75%);background-size:200% 100%;animation:shimmer 1.6s ease-in-out infinite;animation-delay:calc(var(--i, 0) * 90ms)}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 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var(--ease-out)}.list-row__delete:hover:not(:disabled){background:#f871711f;color:#f87171}.list-row__delete:active:not(:disabled){transform:scale(.9)}.list-row__delete:disabled{opacity:.35;cursor:not-allowed}.list-row__confirm-text{flex:1;min-width:0;font-size:.88rem;color:var(--text-1);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.list-row__confirm-actions{display:flex;flex-shrink:0;gap:6px}.list-row__cancel,.list-row__delete-confirm{display:inline-flex;align-items:center;justify-content:center;min-width:56px;padding:6px 12px;border-radius:999px;font-size:.74rem;font-weight:600;white-space:nowrap;transition:background .18s ease,color .18s ease,transform .15s var(--ease-out)}.list-row__cancel{border:1px solid var(--glass-line);background:var(--glass);color:var(--text-2)}.list-row__cancel:hover:not(:disabled){color:var(--text-0);background:var(--glass-strong)}.list-row__delete-confirm{border:none;background:#ef4444;color:#fff}.list-row__delete-confirm:hover:not(:disabled){background:#dc2626}.list-row__delete-confirm .spinner{border-top-color:#fff}.list-row__cancel:active:not(:disabled),.list-row__delete-confirm:active:not(:disabled){transform:scale(.95)}.list-row__cancel:disabled,.list-row__delete-confirm:disabled{opacity:.6;cursor:not-allowed}.logo{position:relative;display:inline-grid;place-items:center;border-radius:50%;flex-shrink:0;isolation:isolate}.logo:before{content:"";position:absolute;top:-35%;right:-35%;bottom:-35%;left:-35%;border-radius:50%;background:radial-gradient(circle,rgba(109,94,249,.5),transparent 65%);filter:blur(14px);z-index:-1;animation:orbGlow 4s ease-in-out infinite}.logo__img{width:100%;height:100%;border-radius:50%;object-fit:cover;background:#fff;padding:8%;box-shadow:inset 0 0 0 1px #ffffff2e,0 6px 18px #00000059;animation:orbFloat 5s ease-in-out infinite}.logo__ring{position:absolute;top:-12%;right:-12%;bottom:-12%;left:-12%;border-radius:50%;border:1px solid rgba(255,255,255,.18);animation:orbSpin 16s linear infinite}.logo__ring:after{content:"";position:absolute;top:-3px;left:50%;width:6px;height:6px;border-radius:50%;background:#fff;box-shadow:0 0 12px #ffffffe6;transform:translate(-50%)}.logo--xs{width:30px;height:30px}.logo--xs .logo__img{padding:0}.logo--sm{width:46px;height:46px}.logo--lg{width:116px;height:116px;margin-bottom:var(--s-3);animation:logoPop .6s var(--ease-spring) both}@keyframes orbGlow{0%,to{opacity:.65;transform:scale(1)}50%{opacity:1;transform:scale(1.12)}}@keyframes orbFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}@keyframes orbSpin{to{transform:rotate(360deg)}}@keyframes 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