:root{--color-bg:linear-gradient(135deg,#667eea,#764ba2);--color-surface:rgba(255,255,255,0.95);--color-surface-hover:rgba(255,255,255,0.98);--color-primary:#4f46e5;--color-primary-hover:#4338ca;--color-primary-glow:rgba(79,70,229,0.3);--color-accent:#f59e0b;--color-accent-hover:#d97706;--color-success:#10b981;--color-error:#ef4444;--color-text:#1f2937;--color-text-muted:#6b7280;--color-border:rgba(209,213,219,0.6);--color-overlay:rgba(0,0,0,0.1);--color-glass:rgba(255,255,255,0.25);--color-glass-border:rgba(255,255,255,0.18);--space-xs:0.25rem;--space-sm:0.5rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2rem;--space-2xl:3rem;--radius-sm:0.5rem;--radius-md:0.75rem;--radius-lg:1rem;--radius-xl:1.5rem;--shadow-sm:0 2px 4px rgba(0,0,0,0.08);--shadow-md:0 8px 25px rgba(0,0,0,0.12);--shadow-lg:0 20px 40px rgba(0,0,0,0.15);--shadow-glow:0 0 20px var(--color-primary-glow);--shadow-inner:inset 0 2px 4px rgba(0,0,0,0.06);--transition-fast:0.2s cubic-bezier(0.4,0,0.2,1);--transition-smooth:0.4s cubic-bezier(0.25,0.46,0.45,0.94);--transition-bounce:0.3s cubic-bezier(0.68,-0.55,0.265,1.55)}*,:after,:before{box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6;min-height:100vh;overflow-x:hidden}@supports (backdrop-filter:blur(10px)){.glass-effect{backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}}.hidden{display:none!important}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.app{min-height:100vh;display:flex;flex-direction:column}.header{background:var(--color-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--color-glass-border);box-shadow:var(--shadow-md);position:sticky;top:0;z-index:100;transition:all var(--transition-smooth)}.header:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--color-primary),transparent);opacity:.6}.header-container{max-width:1280px;margin:0 auto;padding:0 var(--space-xl);display:flex;align-items:center;justify-content:space-between;height:4.5rem}.logo-section{gap:var(--space-md);animation:slideUp .8s ease-out}.icon-bg,.logo-section{display:flex;align-items:center}.icon-bg{background:linear-gradient(135deg,var(--color-primary) 0,var(--color-accent) 100%);padding:var(--space-md);border-radius:var(--radius-lg);justify-content:center;box-shadow:var(--shadow-glow);transition:all var(--transition-bounce);position:relative;overflow:hidden}.icon-bg:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:linear-gradient(45deg,transparent,rgba(255,255,255,.3),transparent);transform:rotate(45deg);transition:all var(--transition-smooth);opacity:0}.icon-bg:hover:before{animation:shimmer 1.5s ease-in-out;opacity:1}.icon-bg:hover{transform:translateY(-2px) scale(1.05);box-shadow:var(--shadow-lg),var(--shadow-glow)}.icon{width:1.75rem;height:1.75rem;color:#fff;transition:all var(--transition-fast)}.title{font-size:1.5rem;font-weight:700;margin:0;background:linear-gradient(135deg,var(--color-text) 0,var(--color-primary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{font-size:.875rem;color:var(--color-text-muted);margin:0;font-weight:500}.nav{display:flex;gap:var(--space-sm);animation:slideUp .8s ease-out .2s both}.nav-link{color:var(--color-text-muted);text-decoration:none;font-size:.875rem;font-weight:500;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);transition:all var(--transition-fast);position:relative;overflow:hidden}.nav-link:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.4),transparent);transition:left var(--transition-smooth)}.nav-link:hover:before{left:100%}.nav-link:focus,.nav-link:hover{background:var(--color-primary);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}.nav-link.active{color:var(--color-accent);background:rgba(245,158,11,.1)}.chat-container{flex:1;display:flex;justify-content:center;padding:var(--space-xl);animation:fadeIn 1s ease-out}.chat-box{width:100%;max-width:800px;background:var(--color-surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--color-glass-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden;transition:all var(--transition-smooth);position:relative;height:calc(100vh - 8rem)}.chat-box:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent),var(--color-primary));background-size:200% 100%;animation:gradientShift 3s ease-in-out infinite}.chat-box:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg),0 0 40px rgba(79,70,229,.15)}.chat-messages{flex:1;padding:var(--space-xl);overflow-y:auto;display:flex;flex-direction:column;gap:var(--space-lg);scroll-behavior:smooth}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:rgba(0,0,0,.05);border-radius:var(--radius-sm)}.chat-messages::-webkit-scrollbar-thumb{background:var(--color-primary);border-radius:var(--radius-sm);transition:background var(--transition-fast)}.chat-messages::-webkit-scrollbar-thumb:hover{background:var(--color-primary-hover)}.chat-welcome{text-align:center;padding:var(--space-2xl) var(--space-md);color:var(--color-text);animation:bounceIn 1s ease-out .5s both}.chat-welcome h2{font-size:1.75rem;font-weight:700;margin-bottom:var(--space-md);background:linear-gradient(135deg,var(--color-primary) 0,var(--color-accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.chat-welcome p{font-size:1rem;color:var(--color-text-muted);line-height:1.6;max-width:600px;margin:0 auto}.message{display:flex;animation:slideUp .4s ease-out}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.message-content{max-width:80%;padding:var(--space-md) var(--space-lg);border-radius:var(--radius-lg);position:relative;font-size:.925rem;line-height:1.6;transition:all var(--transition-fast);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.message.user .message-content{background:linear-gradient(135deg,var(--color-primary) 0,var(--color-accent) 100%);color:#fff;box-shadow:var(--shadow-md);margin-left:var(--space-md)}.message.user .message-content:before{content:"";position:absolute;right:-8px;bottom:8px;width:0;height:0;border-left:8px solid var(--color-primary);border-top:8px solid transparent;border-bottom:8px solid transparent}.message.assistant .message-content{background:var(--color-glass);border:1px solid var(--color-glass-border);color:var(--color-text);box-shadow:var(--shadow-sm);margin-right:var(--space-md)}.message.assistant .message-content:before{content:"";position:absolute;left:-8px;bottom:8px;width:0;height:0;border-right:8px solid var(--color-glass);border-top:8px solid transparent;border-bottom:8px solid transparent}.message-content:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}.message-content p{margin:0}.timestamp{display:block;margin-top:var(--space-sm);font-size:.75rem;color:rgba(255,255,255,.7);opacity:.8}.message.assistant .timestamp{color:var(--color-text-muted)}.message-content.loading{display:flex;align-items:center;gap:var(--space-sm);opacity:.8}.message-content.loading p{font-style:italic}.chat-input-form{display:flex;border-top:1px solid var(--color-glass-border);padding:var(--space-lg);gap:var(--space-md);background:var(--color-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}.chat-input{flex:1;padding:var(--space-md) var(--space-lg);border:2px solid var(--color-border);border-radius:var(--radius-lg);outline:none;font-size:.925rem;background:var(--color-surface);transition:all var(--transition-fast);font-family:inherit}.chat-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 4px var(--color-primary-glow);transform:translateY(-1px)}.chat-input::placeholder{color:var(--color-text-muted);transition:opacity var(--transition-fast)}.chat-input:focus::placeholder{opacity:.5}.chat-input:disabled{opacity:.6;cursor:not-allowed}.send-button{display:flex;align-items:center;justify-content:center;padding:var(--space-md) var(--space-lg);border:none;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--color-primary) 0,var(--color-accent) 100%);color:#fff;font-size:.925rem;font-weight:600;cursor:pointer;transition:all var(--transition-bounce);box-shadow:var(--shadow-md);position:relative;overflow:hidden;min-width:60px}.send-button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.4),transparent);transition:left var(--transition-smooth)}.send-button:hover:before{left:100%}.send-button:focus:not(:disabled),.send-button:hover:not(:disabled){transform:translateY(-2px) scale(1.05);box-shadow:var(--shadow-lg),var(--shadow-glow)}.send-button:active:not(:disabled){transform:translateY(0) scale(.98)}.send-button:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:var(--shadow-sm)}.send-icon{width:1.25rem;height:1.25rem;transition:transform var(--transition-fast)}.send-button:hover:not(:disabled) .send-icon{transform:translateX(2px)}.loader{width:1.25rem;height:1.25rem;animation:spin 1s linear infinite}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes bounceIn{0%{opacity:0;transform:scale(.3)}50%{opacity:1;transform:scale(1.05)}to{opacity:1;transform:scale(1)}}@keyframes shimmer{0%{transform:translateX(-100%) translateY(-100%) rotate(45deg)}to{transform:translateX(100%) translateY(100%) rotate(45deg)}}@keyframes gradientShift{0%,to{background-position:0 50%}50%{background-position:100% 50%}}@media (max-width:768px){.header-container{padding:0 var(--space-md);height:4rem}.nav{display:none}.logo-section{gap:var(--space-sm)}.title{font-size:1.25rem}.subtitle{font-size:.8rem}.chat-container{padding:var(--space-md)}.chat-box{height:calc(100vh - 6rem)}.chat-messages{padding:var(--space-md)}.message-content{max-width:90%;font-size:.875rem;padding:var(--space-sm) var(--space-md)}.chat-input-form{padding:var(--space-md);gap:var(--space-sm)}.chat-input{font-size:.875rem}.chat-input,.send-button{padding:var(--space-sm) var(--space-md)}.send-button{min-width:50px}.send-icon{width:1rem;height:1rem}}@media (max-width:480px){.header-container{padding:0 var(--space-sm)}.chat-container,.chat-messages{padding:var(--space-sm)}.chat-messages{gap:var(--space-md)}.chat-input-form{padding:var(--space-sm)}}.admin{min-height:100vh;display:flex;flex-direction:column}.admin .header{border-bottom:1px solid var(--color-glass-border);box-shadow:var(--shadow-md)}.admin .header-container{justify-content:flex-start;gap:var(--space-xl)}.back-link{display:flex;align-items:center;gap:var(--space-sm);color:var(--color-text-muted);text-decoration:none;font-size:.925rem;font-weight:500;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);transition:all var(--transition-fast)}.back-link:hover{color:var(--color-primary);background:rgba(79,70,229,.1);transform:translateX(-2px)}.back-icon{width:1.25rem;height:1.25rem}.admin-content{flex:1;display:grid;grid-template-columns:2fr 1fr;gap:var(--space-xl);padding:var(--space-xl);max-width:1400px;margin:0 auto;animation:fadeIn 1s ease-out}.admin-main-content{display:flex;flex-direction:column;gap:var(--space-xl)}.card{background:var(--color-surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--color-glass-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:var(--space-2xl);width:100%;text-align:center;transition:all var(--transition-smooth);position:relative;overflow:hidden}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent),var(--color-primary));background-size:200% 100%;animation:gradientShift 3s ease-in-out infinite}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg),0 0 40px rgba(79,70,229,.15)}.card-title{font-size:1.75rem;font-weight:700;margin-bottom:var(--space-md);color:var(--color-text)}.card-subtitle{font-size:1rem;color:var(--color-text-muted);margin-bottom:var(--space-xl)}.dropzone{border:2px dashed var(--color-border);border-radius:var(--radius-lg);padding:var(--space-2xl);cursor:pointer;transition:all var(--transition-fast);display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:150px;background-color:rgba(255,255,255,.05)}.dropzone:hover{background-color:rgba(79,70,229,.05)}.dropzone.active,.dropzone:hover{border-color:var(--color-primary)}.dropzone.active{background-color:rgba(79,70,229,.1)}.choose-button{background:linear-gradient(135deg,var(--color-primary) 0,var(--color-accent) 100%);color:#fff;padding:var(--space-md) var(--space-xl);border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:600;cursor:pointer;margin-top:var(--space-lg);box-shadow:var(--shadow-md);transition:all var(--transition-bounce);position:relative;overflow:hidden}.choose-button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.4),transparent);transition:left var(--transition-smooth)}.choose-button:hover:before{left:100%}.choose-button:hover{transform:translateY(-2px) scale(1.02);box-shadow:var(--shadow-lg),var(--color-primary-glow)}.choose-button:active{transform:translateY(0) scale(.98)}.status{display:flex;align-items:center;justify-content:center;gap:var(--space-sm);margin-top:var(--space-lg);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);font-size:.95rem;font-weight:500;transition:all var(--transition-fast)}.status-icon{width:1.2rem;height:1.2rem}.status.uploading{color:var(--color-primary);background-color:rgba(79,70,229,.1)}.status.success{color:var(--color-success);background-color:rgba(16,185,129,.1)}.status.error{color:var(--color-error);background-color:rgba(239,68,68,.1)}.spinner{animation:spin 1s linear infinite}.reset-button{background:none;border:none;cursor:pointer;color:inherit;padding:0;margin-left:var(--space-sm);display:flex;align-items:center;transition:transform var(--transition-fast)}.reset-button:hover{transform:scale(1.1)}.close-icon{width:1rem;height:1rem}.stats-card{display:flex;flex-direction:column;align-items:center;padding:var(--space-xl)}.stats-card .card-title{margin-bottom:var(--space-xl)}.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:var(--space-lg);width:100%;margin-top:var(--space-lg)}.stat-box{background-color:var(--color-glass);border:1px solid var(--color-glass-border);border-radius:var(--radius-md);padding:var(--space-lg);text-align:center;box-shadow:var(--shadow-sm);transition:all var(--transition-fast)}.stat-box:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.stat-label{font-size:.9rem;color:var(--color-text-muted);margin-bottom:var(--space-sm)}.stat-value{font-size:1.8rem;font-weight:700;color:var(--color-primary);background:linear-gradient(135deg,var(--color-primary) 0,var(--color-accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.uploaded-documents-sidebar{background:var(--color-surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--color-glass-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:var(--space-xl);display:flex;flex-direction:column;gap:var(--space-md);height:fit-content;min-height:400px;position:sticky;top:calc(4.5rem + var(--space-xl));overflow-y:auto;transition:all var(--transition-smooth)}.uploaded-documents-sidebar:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent),var(--color-primary));background-size:200% 100%;animation:gradientShift 3s ease-in-out infinite}.uploaded-documents-sidebar:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg),0 0 40px rgba(79,70,229,.1)}.uploaded-documents-sidebar::-webkit-scrollbar{width:6px}.uploaded-documents-sidebar::-webkit-scrollbar-track{background:rgba(0,0,0,.05);border-radius:var(--radius-sm)}.uploaded-documents-sidebar::-webkit-scrollbar-thumb{background:var(--color-primary);border-radius:var(--radius-sm);transition:background var(--transition-fast)}.uploaded-documents-sidebar::-webkit-scrollbar-thumb:hover{background:var(--color-primary-hover)}.uploaded-documents-sidebar .card-title{margin-bottom:var(--space-md);text-align:left;font-size:1.5rem}.document-list{display:flex;flex-direction:column;gap:var(--space-sm)}.document-item{cursor:pointer}.document-name{flex:1}.document-size{flex-shrink:0}.no-documents-message{color:var(--color-text-muted);font-style:italic;text-align:center;padding:var(--space-lg);background-color:var(--color-glass);border:1px dashed var(--color-border);border-radius:var(--radius-md);@media (max-width:1200px){.admin-content{grid-template-columns:3fr 2fr;gap:var(--space-lg)}}.uploaded-documents-sidebar{position:static;min-height:auto;max-height:300px}}@media (max-width:768px){.admin .header-container{padding:0 var(--space-md);height:4rem;gap:var(--space-md)}.back-link{font-size:.875rem;padding:var(--space-sm)}.back-icon{width:1rem;height:1rem}.admin-content{padding:var(--space-md);gap:var(--space-lg)}.card{padding:var(--space-xl);border-radius:var(--radius-lg)}.card-title{font-size:1.5rem;margin-bottom:var(--space-md)}.card-subtitle{font-size:.9rem;margin-bottom:var(--space-lg)}.dropzone{padding:var(--space-xl);min-height:120px}.choose-button{padding:var(--space-sm) var(--space-lg);font-size:.9rem;margin-top:var(--space-md)}.status{font-size:.875rem;padding:var(--space-xs) var(--space-sm)}.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-lg);width:100%;margin-top:var(--space-lg)}.stat-value{font-size:1.5rem}.uploaded-documents-sidebar{padding:var(--space-lg)}}@media (max-width:480px){.admin .header-container{padding:0 var(--space-sm)}.admin-content{padding:var(--space-sm)}.card{padding:var(--space-lg)}.card-title{font-size:1.3rem}.dropzone{padding:var(--space-lg)}}@media (max-width:992px){.admin-content{grid-template-columns:1fr;padding:var(--space-md)}.uploaded-documents-sidebar{position:static;min-height:auto;max-height:300px;order:2}}@media (max-width:768px){.stats{grid-template-columns:1fr;gap:var(--space-md)}.uploaded-documents-sidebar{padding:var(--space-lg)}.document-item{padding:var(--space-sm)}.document-name{font-size:.85rem}.document-size{font-size:.75rem}}.document-item{display:flex;align-items:center;gap:var(--space-sm);background-color:var(--color-glass);border:1px solid var(--color-glass-border);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);color:var(--color-text);font-size:.9rem;transition:all var(--transition-fast);cursor:default}.document-item:hover{transform:translateX(4px);box-shadow:var(--shadow-sm);background-color:rgba(255,255,255,.35);border-color:var(--color-primary)}.document-icon{width:1rem;height:1rem;color:var(--color-primary);flex-shrink:0}.document-info{flex:1;display:flex;flex-direction:column;gap:var(--space-xs);overflow:hidden}.document-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500}.document-size{font-size:.8rem;color:var(--color-text-muted)}.delete-button{background:none;border:none;cursor:pointer;padding:var(--space-xs);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);opacity:.6;flex-shrink:0}.delete-button:hover:not(:disabled){background-color:rgba(239,68,68,.1);opacity:1;transform:scale(1.1)}.delete-button:disabled{cursor:not-allowed;opacity:.4}.delete-icon{width:.9rem;height:.9rem;color:var(--color-error);transition:color var(--transition-fast)}.delete-button:hover:not(:disabled) .delete-icon{color:#dc2626}.document-item .delete-button{opacity:0;transform:translateX(8px)}.document-item:hover .delete-button{opacity:.6;transform:translateX(0)}.document-item:hover .delete-button:hover{opacity:1}.delete-confirmation{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000}.delete-confirmation-dialog{background:var(--color-surface);border-radius:var(--radius-lg);padding:var(--space-xl);max-width:400px;width:90%;box-shadow:var(--shadow-lg)}.delete-confirmation-title{font-size:1.25rem;font-weight:600;margin-bottom:var(--space-md);color:var(--color-text)}.delete-confirmation-message{color:var(--color-text-muted);margin-bottom:var(--space-xl);line-height:1.5}.delete-confirmation-actions{display:flex;gap:var(--space-md);justify-content:flex-end}.delete-confirmation-button{padding:var(--space-sm) var(--space-lg);border:none;border-radius:var(--radius-md);font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.delete-confirmation-button.cancel{background:var(--color-glass);color:var(--color-text);border:1px solid var(--color-border)}.delete-confirmation-button.cancel:hover{background:var(--color-surface-hover)}.delete-confirmation-button.confirm{background:var(--color-error);color:white}.delete-confirmation-button.confirm:hover{background:#dc2626;transform:translateY(-1px);box-shadow:var(--shadow-md)}@media (max-width:768px){.document-item{padding:var(--space-sm)}.document-name{font-size:.85rem}.document-size{font-size:.75rem}.delete-icon{width:.8rem;height:.8rem}.document-item .delete-button{opacity:.6;transform:translateX(0)}}.auth-container{padding:20px}.auth-card{background:rgba(255,255,255,.95);backdrop-filter:blur(10px);padding:40px;max-width:450px;box-shadow:0 20px 40px rgba(0,0,0,.1);border:1px solid 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