.app{display:flex;height:100vh;height:100dvh;overflow:hidden;position:relative}.sidebar{width:280px;background:var(--bg-card);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;transition:margin-left .3s cubic-bezier(.4,0,.2,1),transform .3s cubic-bezier(.4,0,.2,1);z-index:100;margin-left:-280px}.app.sidebar-visible .sidebar{margin-left:0}.sidebar-overlay{display:none}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;color:var(--text)}.sidebar-logo{font-size:18px;font-weight:700}.new-chat-btn{display:flex;align-items:center;justify-content:center;gap:6px;padding:10px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text);font-size:13px;font-weight:500;transition:all var(--transition);flex:1}.new-chat-btn:hover{background:var(--bg-subtle);border-color:var(--text-muted)}.new-chat-btn svg{flex-shrink:0}.sidebar-actions{display:flex;align-items:center;gap:6px;margin:0 12px 8px}.delete-all-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text-muted);cursor:pointer;transition:all var(--transition);flex-shrink:0}.delete-all-btn:hover{background:#fef2f2;border-color:#fca5a5;color:#dc2626}.sessions-header{display:flex;align-items:center;gap:6px;padding:4px 16px 6px;font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em}.sessions-count{font-size:10px;font-weight:500;color:var(--text-muted);background:var(--bg-subtle);padding:0 6px;border-radius:8px;line-height:18px}.sessions-list{flex:1;overflow-y:auto;padding:0 8px 8px}.sessions-empty{text-align:center;color:var(--text-muted);padding:24px 16px;font-size:13px}.session-item{display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:8px;cursor:pointer;transition:background 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8px;border-radius:6px;border:1.5px solid var(--primary);background:var(--bg-card);font-size:13px;color:var(--text);outline:none;min-width:0}.sidebar-footer{flex-shrink:0;padding:8px 16px 12px}.sidebar-footer-meta{display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--text-muted)}.tools-empty{text-align:center;color:var(--text-muted);padding:16px;font-size:12px}.tools-dialog{width:480px!important;max-width:90vw!important}.tools-dialog .settings-body{max-height:60vh;overflow-y:auto}.tools-dialog .tool-card{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border-radius:var(--radius-sm);transition:background var(--transition);margin-bottom:4px;background:var(--bg-subtle)}.tools-dialog .tool-card:hover{background:var(--primary-light)}.tools-dialog .tool-icon{font-size:24px;flex-shrink:0;margin-top:2px}.tools-dialog .tool-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}.tools-dialog .tool-name{font-size:14px;font-weight:600;color:var(--text)}.tools-dialog .tool-desc{font-size:12px;color:var(--text-secondary);line-height:1.4}.tools-dialog .tool-category{font-size:10px;color:var(--primary);background:var(--primary-light);padding:2px 8px;border-radius:10px;white-space:nowrap;flex-shrink:0;font-weight:500;align-self:flex-start;margin-top:2px}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg)}.chat-header{display:flex;align-items:center;gap:12px;padding:8px 24px;background:var(--bg-card);border-bottom:1px solid var(--border);z-index:10;min-height:56px}.menu-btn{width:36px;height:36px;border-radius:var(--radius-sm);font-size:18px;display:flex;align-items:center;justify-content:center;transition:all var(--transition);color:var(--text-secondary);flex-shrink:0}.menu-btn:hover{background:var(--bg);color:var(--text)}.menu-btn.active{background:var(--primary-light);color:var(--primary)}.header-title h1{font-size:16px;font-weight:600;color:var(--text);margin:0}.header-btn{width:34px;height:34px;display:flex;align-items:center;justify-content:center;border-radius:8px;color:var(--text-secondary);transition:all var(--transition);flex-shrink:0}.header-btn:hover:not(:disabled){background:var(--bg-subtle);color:var(--text)}.header-btn:disabled{opacity:.4;cursor:not-allowed}.settings-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease}.settings-dialog{background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:0 20px 60px #00000026,var(--shadow-glow);width:420px;max-width:90vw;max-height:80vh;overflow-y:auto;animation:slideUp .25s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}.settings-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px 0}.settings-header h3{font-size:18px;font-weight:700;color:var(--text)}.settings-close{width:32px;height:32px;border-radius:8px;border:none;background:var(--bg-subtle);font-size:14px;cursor:pointer;color:var(--text-muted);transition:all var(--transition);display:flex;align-items:center;justify-content:center}.settings-close:hover{background:var(--border);color:var(--text)}.settings-body{padding:16px 24px 24px}.settings-label{display:block;font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:10px}.settings-presets{display:flex;gap:8px;flex-wrap:wrap}.settings-preset-btn{padding:8px 16px;border-radius:8px;border:1.5px solid var(--border);background:var(--bg-card);font-size:13px;font-family:SF Mono,Fira Code,monospace;font-weight:600;color:var(--text-secondary);cursor:pointer;transition:all var(--transition)}.settings-preset-btn:hover{border-color:var(--primary);color:var(--primary)}.settings-preset-btn.active{background:var(--primary);color:#fff;border-color:transparent}.settings-divider{display:flex;align-items:center;margin:16px 0;gap:12px}.settings-divider:before,.settings-divider:after{content:"";flex:1;height:1px;background:var(--border)}.settings-divider span{font-size:12px;color:var(--text-muted);white-space:nowrap}.settings-input-row{display:flex;gap:8px}.settings-input{flex:1;padding:10px 14px;border-radius:8px;border:1.5px solid var(--border);background:var(--bg-subtle);font-size:14px;font-family:SF Mono,Fira Code,monospace;font-weight:500;color:var(--text);outline:none;transition:all var(--transition)}.settings-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);background:var(--bg-card)}.settings-input::placeholder{color:var(--text-muted);font-weight:400}.settings-save-btn{padding:10px 20px;border-radius:8px;border:none;background:var(--primary);color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:opacity var(--transition);white-space:nowrap}.settings-save-btn:hover{opacity:.85}.settings-hint{margin-top:12px;font-size:12px;color:var(--text-muted);line-height:1.5}.settings-select{width:100%;padding:10px 14px;border-radius:8px;border:1.5px solid var(--border);background:var(--bg-subtle);font-size:14px;font-weight:500;color:var(--text);outline:none;transition:all var(--transition);-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer;margin-bottom:16px}.settings-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);background:var(--bg-card)}.settings-avatar-row{display:flex;align-items:center;gap:14px;margin-bottom:20px}.settings-avatar-preview{width:64px;height:64px;border-radius:50%;background:var(--primary);color:#fff;font-size:24px;font-weight:600;display:flex;align-items:center;justify-content:center;cursor:pointer;position:relative;overflow:hidden;flex-shrink:0;border:2px solid var(--border)}.settings-avatar-preview img{width:100%;height:100%;object-fit:cover}.settings-avatar-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity var(--transition)}.settings-avatar-preview:hover .settings-avatar-overlay{opacity:1}.settings-avatar-hint{font-size:12px;color:var(--text-muted)}.email-body-input{width:100%;padding:10px 12px;border-radius:8px;border:1.5px solid var(--border);background:var(--bg-input);color:var(--text);font-size:14px;line-height:1.6;resize:vertical;min-height:160px;font-family:inherit;box-sizing:border-box;margin-top:6px}.email-body-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);background:var(--bg-card);outline:none}.email-body-input::placeholder{color:var(--text-muted)}.email-edit-btn{margin-top:8px;padding:4px 12px;border-radius:6px;border:1.5px solid var(--border);background:var(--bg-card);color:var(--text-secondary);font-size:13px;cursor:pointer;transition:all var(--transition)}.email-edit-btn:hover{border-color:var(--primary);color:var(--primary)}.email-dialog{width:560px;max-width:90vw}.email-dialog .settings-input{display:block;width:100%;box-sizing:border-box}.messages-container{flex:1;overflow-y:auto;padding:0;scroll-behavior:smooth;background:var(--bg)}.messages-container:after{content:"";display:block;height:32px;background:linear-gradient(to 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.message-avatar{top:12px;left:16px;background:var(--bg-subtle);border:1.5px solid var(--border);color:var(--text-secondary)}.message-avatar img{width:100%;height:100%;object-fit:cover;border-radius:50%}.message-avatar .avatar-fallback{display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:var(--primary)}.message-avatar svg{width:16px;height:16px}.message-content{position:relative;max-width:78%;min-width:0;display:flex;flex-direction:column;gap:8px;background:var(--bg-card);border-radius:12px;padding:12px 16px;box-shadow:var(--shadow)}.message.user .message-content{align-items:flex-end;background:var(--bg-card);color:var(--text);border-bottom-right-radius:4px;padding:12px 56px 12px 16px}.message.assistant .message-content{border-bottom-left-radius:4px;padding:12px 16px 12px 56px;max-width:88%}.message-text{line-height:1.7;font-size:15px;word-break:break-word}.message.user .message-text,.message.assistant 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var(--transition)}.tool-call-summary:hover{background:#00000008}.tool-call-num{font-size:10px;color:var(--text-muted);font-family:SF Mono,Fira Code,monospace;font-weight:500;min-width:20px}.tool-call-name{font-weight:600;color:var(--text);flex:1}.tool-call-arrow{font-size:9px;color:var(--text-muted);transition:transform var(--transition)}.tool-call-detail[open]>.tool-call-summary .tool-call-arrow{transform:rotate(180deg)}.tool-call-body{padding:4px 12px 10px;display:flex;flex-direction:column;gap:6px}.tool-call-section{display:flex;flex-direction:column;gap:2px}.tool-call-section .label{font-size:9px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.tool-call-section pre{background:#1e293b;color:#e2e8f0;padding:6px 10px;border-radius:6px;overflow-x:auto;font-size:11px;line-height:1.5;white-space:pre-wrap;word-break:break-all;max-height:120px;overflow-y:auto}.typing-indicator{display:flex;align-items:center;gap:6px;padding:11px 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var(--border);overflow:hidden;background:var(--bg);display:flex;flex-direction:column;align-items:center;transition:border-color var(--transition)}.att-preview.error{border-color:#fca5a5}.att-preview.image,.att-preview.file{width:72px;height:72px}.att-img{width:100%;height:100%;object-fit:cover}.att-file-badge{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;height:100%;gap:2px;font-size:22px}.att-ext{font-size:10px;font-weight:700;color:var(--text-secondary);background:var(--bg);padding:1px 5px;border-radius:3px}.att-label{position:absolute;bottom:0;left:0;right:0;background:#0000008c;color:#fff;font-size:9px;text-align:center;padding:2px 3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.att-remove{position:absolute;top:2px;right:2px;width:18px;height:18px;border-radius:50%;background:#0000008c;color:#fff;font-size:10px;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity var(--transition)}.att-preview:hover .att-remove{opacity:1}.att-loading,.att-error{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#ffffffbf;font-size:10px;color:var(--text-secondary);font-weight:500}.att-error{background:#fef2f2d9;color:#dc2626}.input-area{padding:12px 24px 16px;background:var(--bg-card);border-top:1px solid var(--border)}.input-wrapper{display:flex;align-items:center;gap:6px;max-width:820px;margin:0 auto;background:var(--bg);border:1.5px solid var(--border);border-radius:14px;padding:10px 6px;transition:border-color var(--transition),box-shadow var(--transition)}.input-wrapper:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.model-selector{position:relative;display:flex;align-items:center;flex-shrink:0}.model-select{-moz-appearance:none;appearance:none;-webkit-appearance:none;border:none;background:var(--primary-light);color:var(--primary);font-size:11px;font-weight:600;padding:4px 20px 4px 8px;border-radius:6px;cursor:pointer;outline:none;transition:all var(--transition);font-family:inherit;max-width:120px;overflow:hidden;text-overflow:ellipsis}.model-select:hover{background:#dde4ff}.model-select:disabled{opacity:.5;cursor:not-allowed}.model-select-arrow{position:absolute;right:6px;top:50%;transform:translateY(-50%);pointer-events:none;color:var(--primary)}.chat-input{flex:1;border:none;outline:none;font-size:15px;line-height:1.5;color:var(--text);background:transparent;min-height:24px;max-height:120px;padding:6px 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var(--border);font-size:13px;color:var(--text);background:var(--bg-card);transition:all var(--transition)}.admin-cancel-btn:hover{background:var(--bg-subtle)}.admin-confirm-btn{padding:8px 16px;border-radius:8px;border:none;background:var(--primary);color:#fff;font-size:13px;font-weight:500;transition:opacity var(--transition)}.admin-confirm-btn:hover{opacity:.85}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--primary: #4f46e5;--primary-hover: #4338ca;--primary-light: #eef2ff;--bg: #f5f5f5;--bg-card: #ffffff;--bg-subtle: #fafafa;--text: #171717;--text-secondary: #737373;--text-muted: #a3a3a3;--border: #e5e5e5;--border-light: #f0f0f0;--shadow: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .05);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .08);--radius: 12px;--radius-sm: 8px;--radius-lg: 16px;--transition: all .2s ease}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft 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