@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--color-primary: #1e40af;--color-primary-light: #3b82f6;--color-primary-dark: #1e3a8a;--color-secondary: #64748b;--color-success: #22c55e;--color-warning: #eab308;--color-error: #ef4444;--bg-page: #f8fafc;--bg-surface: #ffffff;--bg-sidebar: #1e293b;--bg-sidebar-hover: #334155;--bg-sidebar-active: rgba(59, 130, 246, .15);--text-primary: #0f172a;--text-secondary: #64748b;--text-sidebar: #cbd5e1;--text-sidebar-active: #ffffff;--border-color: #e2e8f0;--border-radius: 8px;--border-radius-lg: 12px;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--sidebar-width: 260px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 3px rgba(15, 23, 42, .06);--shadow-md: 0 2px 4px rgba(15, 23, 42, .04), 0 4px 12px rgba(15, 23, 42, .06);--shadow-lg: 0 4px 8px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .08)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font-family);font-size:14px;line-height:1.5;color:var(--text-primary);background-color:var(--bg-page);-webkit-font-smoothing:antialiased}#root{height:100%}.app-layout{display:flex;min-height:100vh}.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-width);background:var(--bg-sidebar);display:flex;flex-direction:column;z-index:50;overflow:hidden;box-shadow:2px 0 8px #0f172a1f}.sidebar-overlay{position:fixed;inset:0;background:#00000080;z-index:40}.sidebar__logo{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar__logo-icon{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-light) 100%);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.sidebar__logo-title{font-size:18px;font-weight:700;color:#fff}.sidebar__logo-subtitle{font-size:11px;color:var(--text-sidebar);margin-top:2px}.sidebar__nav{flex:1;min-height:0;padding:12px;display:flex;flex-direction:column;gap:4px}.sidebar__nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--border-radius);color:var(--text-sidebar);font-size:14px;font-weight:500;width:100%;text-align:left;transition:all .15s ease;border:none;background:none;cursor:pointer;flex-shrink:0}.sidebar__nav-item:hover{background:var(--bg-sidebar-hover);color:#fff}.sidebar__nav-item--active{background:linear-gradient(90deg,#3b82f633,#3b82f614);color:var(--color-primary-light);box-shadow:inset 3px 0 0 var(--color-primary-light)}.sidebar__nav-item:focus-visible{outline:2px solid var(--color-primary-light);outline-offset:-2px}.sidebar__nav-label{flex:1}.sidebar__conversations{flex:1;min-height:0;overflow-y:auto;padding:4px 0;display:flex;flex-direction:column;gap:2px}.sidebar__conv-new{display:flex;align-items:center;gap:8px;width:100%;padding:8px 12px;border-radius:6px;background:none;border:1px dashed rgba(255,255,255,.15);color:var(--text-sidebar);font-size:13px;cursor:pointer;transition:all .15s;flex-shrink:0;margin-bottom:4px}.sidebar__conv-new:hover{background:var(--bg-sidebar-hover);color:#fff;border-color:#ffffff40}.sidebar__conv-item{display:flex;align-items:center;gap:8px;width:100%;padding:7px 10px;border-radius:6px;background:none;border:none;cursor:pointer;text-align:left;color:var(--text-sidebar);font-size:13px;transition:background .15s ease;position:relative;flex-shrink:0}.sidebar__conv-item:hover{background:var(--bg-sidebar-hover);color:#fff}.sidebar__conv-item--active{background:var(--bg-sidebar-active);color:var(--color-primary-light);box-shadow:inset 3px 0 0 var(--color-primary-light)}.sidebar__conv-item:focus-visible{outline:2px solid var(--color-primary-light);outline-offset:-2px}.sidebar__conv-item-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar__conv-item-delete{opacity:0;background:none;border:none;cursor:pointer;color:var(--text-sidebar);padding:2px;border-radius:4px;transition:all .15s;flex-shrink:0}.sidebar__conv-item:hover .sidebar__conv-item-delete{opacity:1}.sidebar__conv-item-delete:hover{color:var(--color-error);background:#ef444426}.sidebar__conv-new--disabled,.sidebar__conv-new:disabled{opacity:.35;cursor:not-allowed}.sidebar__conv-new:disabled:hover{background:none;color:var(--text-sidebar);border-color:#ffffff26}.sidebar__conv-empty{display:flex;flex-direction:column;align-items:center;gap:8px;padding:24px 12px;color:#94a3b899;font-size:12px}.sidebar__nav-bottom{flex-shrink:0;padding:8px 12px;display:flex;flex-direction:column;gap:4px;border-top:1px solid rgba(255,255,255,.08)}.sidebar__user{padding:12px;border-top:1px solid rgba(255,255,255,.1)}.sidebar__user-info{display:flex;align-items:center;gap:10px;padding:8px;margin-bottom:8px}.sidebar__avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-light) 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var(--border-color);border-radius:var(--border-radius-lg);padding:48px 24px;text-align:center;cursor:pointer;transition:all .2s ease;margin-bottom:20px;background:#f8fafc80}.upload-zone:hover,.upload-zone--active{border-color:var(--color-primary);background:#1e40af05}.upload-zone--has-file{border-style:solid;border-color:var(--color-primary-light);background:#1e40af05}.upload-zone__empty,.upload-zone__file{display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--text-secondary)}.upload-zone__text{font-size:16px;font-weight:500;color:var(--text-primary)}.upload-zone__filename{font-size:15px;font-weight:600;color:var(--text-primary)}.upload-zone__filesize{font-size:13px;color:var(--text-secondary)}.upload-zone__hint{font-size:12px;color:var(--text-secondary)}.upload-progress{display:flex;flex-direction:column;align-items:center;gap:16px;padding:48px 24px;color:var(--color-primary)}.upload-progress__text{font-size:15px;color:var(--text-primary)}.upload-progress__steps{display:flex;gap:8px;margin-top:8px}.progress-bar{width:100%;height:8px;background:#1e40af1a;border-radius:4px;overflow:hidden}.progress-bar__fill{height:100%;background:linear-gradient(90deg,var(--color-primary) 0%,var(--color-primary-light) 100%);border-radius:4px;transition:width .3s ease;position:relative}.progress-bar__fill:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.3) 50%,transparent 100%);animation:shimmer 2s infinite}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.progress-step{padding:6px 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