.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;z-index:9999;animation:modalFadeIn .2s ease-out}.modal-overlay.show{display:flex}@keyframes modalFadeIn{from{opacity:0}to{opacity:1}}.modal-container{background:var(--container-bg);border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.3);min-width:320px;max-width:90vw;width:480px;max-height:80vh;display:flex;flex-direction:column;animation:modalSlideIn .3s ease-out}@keyframes modalSlideIn{from{opacity:0;transform:scale(.9) translateY(-20px)}to{opacity:1;transform:scale(1) translateY(0)}}.modal-header{padding:20px 24px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}.modal-title{font-size:18px;font-weight:600;color:var(--assistant-msg-fg);margin:0}.modal-close{width:32px;height:32px;border-radius:50%;background:0 0;border:none;font-size:28px;line-height:1;color:var(--timestamp-fg);cursor:pointer;transition:color .2s,transform .2s;display:flex;align-items:center;justify-content:center;flex-shrink:0}@media (prefers-color-scheme:dark){.modal-close{background:0 0}}.modal-close:hover{color:var(--error-fg);transform:rotate(90deg)}.modal-close:active{transform:rotate(90deg) scale(.9)}.modal-body{padding:24px;overflow-y:auto;flex:1;min-height:0}.modal-body::-webkit-scrollbar{width:6px}.modal-body::-webkit-scrollbar-track{background:var(--scrollbar-track)!important}.modal-body::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb)!important;border-radius:3px!important}.modal-body::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover)!important}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--scrollbar-track)!important;border-radius:4px}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb)!important;border-radius:4px;transition:background .2s ease!important}::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover)!important}.modal-body::-webkit-scrollbar,.session-list::-webkit-scrollbar{width:6px}.modal-body::-webkit-scrollbar-thumb,.session-list::-webkit-scrollbar-thumb{border-radius:3px}#modalMessage{margin:0;font-size:15px;line-height:1.6;color:var(--assistant-msg-fg);word-wrap:break-word}.modal-footer{padding:16px 24px;border-top:1px solid var(--border-color);display:flex;gap:12px;justify-content:flex-end;flex-shrink:0}.modal-btn{padding:10px 24px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;border:none;white-space:nowrap}.modal-btn-cancel{background:var(--session-item-hover);color:var(--assistant-msg-fg)}.modal-btn-cancel:hover{background:var(--border-color)}.modal-btn-confirm{background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:#fff}@media (prefers-color-scheme:dark){.modal-btn-confirm{background:linear-gradient(135deg,#4f46e5 0,#7c3aed 100%)}}.modal-btn-confirm:hover{transform:translateY(-2px);box-shadow:0 10px 20px rgba(102,126,234,.3)}.modal-btn-confirm:active{transform:translateY(0)}.modal-footer.single-button{justify-content:center}.modal-footer.single-button .modal-btn-cancel{display:none}@media (max-width:600px){.modal-container{width:90vw;min-width:280px}.modal-header{padding:16px 20px}.modal-title{font-size:16px}.modal-body{padding:20px}#modalMessage{font-size:14px}.modal-footer{padding:12px 16px}.modal-btn{flex:1;padding:10px 16px;font-size:14px}}:root{--bg-gradient:linear-gradient(135deg, #667eea 0%, #764ba2 100%);--container-bg:#ffffff;--header-fg:#ffffff;--user-msg-bg:#667eea;--assistant-msg-bg:#f0f0f0;--assistant-msg-fg:#333;--error-bg:#ffebee;--error-fg:#c62828;--border-color:#e0e0e0;--input-border:#ddd;--input-focus:#667eea;--timestamp-fg:#999;--timestamp-fg-user:rgba(255, 255, 255, 0.75);--info-bg:#f9f9f9;--scrollbar-thumb:rgba(0,0,0,.2);--scrollbar-thumb-hover:rgba(0,0,0,.3);--scrollbar-track:rgba(0,0,0,.05);--select-bg:#ffffff;--select-option-bg:#ffffff;--select-option-hover:#f5f5f5;--sidebar-bg:#f8f9fa;--session-item-hover:#e9ecef;--session-item-active:#667eea;--loading-dot-color:#667eea;--vh:1vh}@media (prefers-color-scheme:dark){:root{--bg-gradient:linear-gradient(135deg, #1f2937 0%, #111827 100%);--container-bg:#1e1e1e;--header-fg:#e5e7eb;--user-msg-bg:#0e1e54;--assistant-msg-bg:#2d2d2d;--assistant-msg-fg:#d1d5db;--error-bg:#5c1b1b;--error-fg:#f87171;--border-color:#374151;--input-border:#374151;--input-focus:#6366f1;--timestamp-fg:#6b7280;--timestamp-fg-user:rgba(255, 255, 255, 0.9);--info-bg:#111827;--scrollbar-thumb:rgba(156, 163, 175, 0.3);--scrollbar-thumb-hover:rgba(156, 163, 175, 0.5);--scrollbar-track:rgba(55, 65, 81, 0.3);--select-bg:#2d2d2d;--select-option-bg:#1e1e1e;--select-option-hover:#374151;--sidebar-bg:#1a1a1a;--session-item-hover:#2d2d2d;--session-item-active:#4f46e5;--loading-dot-color:#6366f1}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--bg-gradient);height:100vh;height:100dvh;overflow:hidden;display:flex;align-items:center;justify-content:center;color:var(--assistant-msg-fg)}@supports not (height:100dvh){body{height:100vh}}.chat-container{display:flex;width:100vw;width:100dvw;height:100vh;height:100dvh;background:var(--container-bg);box-shadow:0 20px 60px rgba(0,0,0,.3);overflow:hidden;position:relative}@supports not (height:100dvh){.chat-container{width:100vw;height:100vh}}.session-sidebar{width:280px;min-width:280px;background:var(--sidebar-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column;transition:margin-left .3s cubic-bezier(.4, 0, .2, 1);position:relative;z-index:10}.session-sidebar.collapsed{margin-left:-280px;z-index:100}.session-header{padding:16px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.session-header h2{font-size:16px;font-weight:600;color:var(--assistant-msg-fg)}.btn-new-session{width:32px;height:32px;border-radius:50%;background:var(--user-msg-bg);color:#fff;border:none;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .2s;flex-shrink:0}.btn-new-session:hover{transform:scale(1.1)}.session-list{flex:1;overflow-y:auto;padding:8px}.session-item{padding:12px;margin-bottom:8px;border-radius:8px;cursor:pointer;transition:background .2s;display:flex;align-items:center;justify-content:space-between;gap:8px;position:relative}.session-item:hover{background:var(--session-item-hover)}.session-item.active{background:var(--session-item-active);color:#fff}.session-item.active .session-meta,.session-item.active .session-name{color:#fff}.session-item.pending{opacity:.6;cursor:default;background:var(--session-item-hover);border:1px dashed var(--border-color)}.session-item.pending .session-name{font-style:italic;color:var(--timestamp-fg)}.session-item.pending:hover{background:var(--session-item-hover)}.session-info{flex:1;min-width:0;overflow:hidden;position:relative}.session-name{font-size:14px;font-weight:500;color:var(--assistant-msg-fg);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:4px;position:relative;padding-right:4px}.session-meta{font-size:11px;color:var(--timestamp-fg);display:flex;gap:8px}.btn-delete-session{width:28px;height:28px;min-width:28px;border-radius:4px;background:0 0;border:none;font-size:14px;cursor:pointer;opacity:0;transition:opacity .2s,background-color .2s;display:flex;align-items:center;justify-content:center;flex-shrink:0}.session-item:hover .btn-delete-session{opacity:1}.btn-delete-session:hover{background-color:rgba(239,68,68,.15)}.session-item.active .btn-delete-session:hover{background-color:rgba(255,255,255,.2)}.sidebar-toggle{position:absolute;left:290px;top:20px;width:36px;height:36px;background:var(--user-msg-bg);border:none;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;color:#fff;z-index:999;transition:all .3s cubic-bezier(.4, 0, .2, 1);flex-shrink:0;box-shadow:0 2px 12px rgba(0,0,0,.15)}.sidebar-toggle:hover{transform:scale(1.1);box-shadow:0 4px 16px rgba(102,126,234,.4)}@media (prefers-color-scheme:dark){.sidebar-toggle{background:var(--user-msg-bg);box-shadow:0 2px 12px rgba(0,0,0,.4)}.sidebar-toggle:hover{box-shadow:0 4px 16px rgba(79,70,229,.5)}}.sidebar-toggle:active{transform:scale(.95)}.session-sidebar.collapsed+.chat-main .sidebar-toggle{left:20px}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}.container{width:100%;height:100%;display:flex;flex-direction:column}.header{padding:16px 20px;border-bottom:1px solid var(--border-color);background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:var(--header-fg);display:flex;align-items:center;gap:16px;flex-wrap:wrap}@media (prefers-color-scheme:dark){.header{background:linear-gradient(135deg,#4f46e5 0,#7c3aed 100%)}}.header h1{font-size:20px;margin:0;flex:1;min-width:150px}.status{font-size:12px;opacity:.9;white-space:nowrap}.status.connected::before{content:'●';color:#4caf50;margin-right:5px}.status.disconnected::before{content:'●';color:#f44336;margin-right:5px}.theme-toggle{background:rgba(255,255,255,.15);color:var(--header-fg);padding:6px 12px;border:none;border-radius:6px;cursor:pointer;font-size:12px;white-space:nowrap;flex-shrink:0}.theme-toggle:hover{background:rgba(255,255,255,.25)}@media (prefers-color-scheme:dark){.theme-toggle{background:rgba(0,0,0,.3)}}.model-selector{padding:12px 20px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--container-bg)}.model-selector label{font-size:14px;font-weight:500;color:var(--assistant-msg-fg);white-space:nowrap}.model-select{flex:1;min-width:200px;max-width:400px;padding:8px 12px;border:1px solid var(--input-border);border-radius:6px;font-size:14px;font-family:inherit;background:var(--select-bg);color:var(--assistant-msg-fg);cursor:pointer;transition:border-color .2s,box-shadow .2s}.model-select:focus{outline:0;border-color:var(--input-focus);box-shadow:0 0 0 3px rgba(102,126,234,.15)}@media (prefers-color-scheme:dark){.model-select:focus{box-shadow:0 0 0 3px rgba(99,102,241,.2)}}.model-select:hover:not(:disabled){border-color:var(--input-focus)}.model-select:disabled{opacity:.6;cursor:not-allowed}.model-select optgroup{font-weight:600;font-style:normal;background:var(--select-option-bg);color:var(--assistant-msg-fg)}.model-select option{padding:6px;font-weight:400;background:var(--select-option-bg);color:var(--assistant-msg-fg)}@media (prefers-color-scheme:dark){.model-select{color-scheme:dark}}.chat-area{flex:1;overflow-y:auto;overflow-x:hidden;padding:20px;display:flex;flex-direction:column;gap:12px;min-height:0}.message{display:flex;gap:12px;animation:slideIn .3s ease-out;width:100%}@keyframes slideIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.user{justify-content:flex-end}.message-content{max-width:70%;padding:12px 16px;border-radius:12px;word-wrap:break-word;word-break:break-word;overflow-wrap:break-word;line-height:1.5;position:relative;min-width:0}.message.user .message-content{background:var(--user-msg-bg);color:#fff;border-radius:12px 4px 12px 12px}.message.assistant .message-content{background:var(--assistant-msg-bg);color:var(--assistant-msg-fg);border-radius:4px 12px 12px 12px}.message.error .message-content{background:var(--error-bg);color:var(--error-fg);border-radius:12px}.avatar{width:32px;height:32px;min-width:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;color:#fff;flex-shrink:0}.message.user .avatar{background:#667eea;order:2}.message.assistant .avatar{background:#764ba2;order:-1}@media (prefers-color-scheme:dark){.message.user .avatar{background:#4f46e5}.message.assistant .avatar{background:#7c3aed}}.timestamp{font-size:11px;color:var(--timestamp-fg);margin-top:6px;opacity:.9}.message.user .timestamp{color:var(--timestamp-fg-user)}.loading-dots{display:inline-flex;align-items:center;gap:4px;padding:4px 0}.loading-dots span{width:8px;height:8px;border-radius:50%;background-color:var(--loading-dot-color);animation:loading-bounce 1.4s infinite ease-in-out both}.loading-dots span:first-child{animation-delay:-.32s}.loading-dots span:nth-child(2){animation-delay:-.16s}@keyframes loading-bounce{0%,100%,80%{transform:scale(0);opacity:.5}40%{transform:scale(1);opacity:1}}.streaming-indicator{display:inline-block;width:8px;height:8px;border-radius:50%;background-color:var(--loading-dot-color);animation:pulse 1.5s ease-in-out infinite;margin-left:4px}@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.3;transform:scale(.8)}}.input-area{padding:16px 20px;border-top:1px solid var(--border-color);display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end}.input-group{flex:1;min-width:200px;display:flex;gap:12px;align-items:flex-end}textarea{flex:1;padding:12px 16px;border:1px solid var(--input-border);border-radius:8px;font-size:14px;font-family:inherit;resize:vertical;min-height:60px;max-height:200px;background:0 0;color:inherit;min-width:0}button{padding:12px 20px;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:#fff;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:transform .2s,box-shadow .2s;white-space:nowrap}@media (prefers-color-scheme:dark){button{background:linear-gradient(135deg,#4f46e5 0,#7c3aed 100%)}}button:hover:not(:disabled){box-shadow:0 10px 20px rgba(102,126,234,.3)}button:active:not(:disabled){transform:translateY(0)}button:disabled{opacity:.6;cursor:not-allowed}.info{font-size:12px;color:var(--timestamp-fg);text-align:center;padding:10px;background:var(--info-bg)}.markdown-body{overflow-wrap:break-word;word-break:break-word}.markdown-body pre{overflow-x:auto;max-width:100%}.markdown-body code{word-break:break-all}.markdown-body pre code{word-break:normal}.markdown-body img{max-width:100%;height:auto}.markdown-body table{display:block;overflow-x:auto;max-width:100%}@media (max-width:900px){.message-content{max-width:75%}}@media (max-width:600px){body{height:100vh;height:100dvh;height:calc(var(--vh,1vh) * 100);min-height:-webkit-fill-available}.chat-container{flex-direction:column;height:100vh;height:100dvh;height:calc(var(--vh,1vh) * 100);min-height:-webkit-fill-available;overflow:hidden;position:relative}.session-sidebar{position:absolute;left:0;top:0;width:280px;height:100%;z-index:1000;margin-left:0;transform:translateX(-100%);transition:transform .3s ease;pointer-events:none}.session-sidebar.show{transform:translateX(0);pointer-events:auto}.session-sidebar.collapsed{margin-left:0;transform:translateX(-100%)}.session-sidebar .sidebar-close-btn{display:flex}.session-name{-webkit-touch-callout:default;-webkit-user-select:text;user-select:text}.session-name::after{content:'';position:absolute;right:0;top:0;width:30px;height:100%;background:linear-gradient(to left,var(--sidebar-bg),transparent);pointer-events:none}.session-item.active .session-name::after{background:linear-gradient(to left,var(--session-item-active),transparent)}.session-item:hover .session-name::after{background:linear-gradient(to left,var(--session-item-hover),transparent)}.sidebar-toggle{position:absolute;left:16px;top:16px;width:40px;height:40px;font-size:20px;z-index:998}.chat-main{width:100%;height:100%;display:flex;flex-direction:column;overflow:hidden;position:relative}.container{width:100%;height:100%;display:flex;flex-direction:column;overflow:hidden;position:relative}.header{padding:12px 16px;gap:8px;min-height:64px;display:flex;grid-template-columns:1fr auto auto;grid-template-rows:1fr;align-items:center;flex-wrap:nowrap;flex-shrink:0}.header h1{font-size:16px;grid-column:1;grid-row:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:0}.status{font-size:11px;grid-column:2;grid-row:1;margin:0}.theme-toggle{padding:8px;font-size:18px;grid-column:3;grid-row:1;min-width:36px;width:36px;height:36px;display:flex;align-items:center;justify-content:center;margin:0}.model-selector{padding:10px 12px;gap:8px;flex-shrink:0}.model-selector label{font-size:13px;width:100%}.model-select{width:100%;min-width:0;max-width:none;font-size:13px;padding:8px 10px}.chat-area{padding:16px 12px;gap:10px;flex:1;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;min-height:0;will-change:scroll-position;transform:translateZ(0);-webkit-transform:translateZ(0)}.message{gap:8px}.message-content{max-width:80%;padding:10px 14px;font-size:14px}.avatar{width:28px;height:28px;min-width:28px;font-size:14px}.timestamp{font-size:10px;margin-top:4px}.input-area{padding:12px;gap:8px;flex-shrink:0;position:relative;background:var(--container-bg)}.input-group{min-width:0;width:100%;flex-direction:column;gap:8px}textarea{min-height:50px;max-height:120px;font-size:14px;padding:10px 12px;width:100%;font-size:16px}button{width:100%;padding:10px 16px;font-size:14px}.info{font-size:11px;padding:8px}.sidebar-toggle-mobile{width:36px;font-size:18px}}.sidebar-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);display:none;z-index:999;animation:modalFadeIn .2s ease-out}.sidebar-overlay.show{display:block}.message-actions{display:flex;align-items:center;justify-content:flex-start;gap:4px;margin-top:8px;padding-top:4px;border-top:1px solid rgba(0,0,0,.05)}@media (prefers-color-scheme:dark){.message-actions{border-top-color:rgba(255,255,255,.05)}}.cancel-btn{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;padding:0;margin:0;background:0 0;color:var(--error-fg);border:1px solid var(--error-fg);border-radius:4px;cursor:pointer;transition:all .2s;vertical-align:middle}@media (prefers-color-scheme:dark){.cancel-btn{background:0 0;border-color:var(--error-fg)}}.cancel-btn:hover{background:var(--error-fg);color:#fff;transform:none;box-shadow:none}.cancel-btn:active{transform:scale(.95)}.btn-copy-markdown{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;padding:0;margin:0;background:0 0!important;border:1px solid var(--border-color);border-radius:4px;color:var(--timestamp-fg);cursor:pointer;transition:all .2s;vertical-align:middle}.btn-copy-markdown:hover{background:var(--border-color);color:var(--assistant-msg-fg)}.btn-delete-message{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;padding:0;margin:0;background:0 0!important;border:1px solid var(--border-color);border-radius:4px;color:var(--timestamp-fg);cursor:pointer;transition:all .2s;vertical-align:middle}.btn-delete-message:hover{background:rgba(239,68,68,.1)!important;color:var(--error-fg);border-color:var(--error-fg)}