:root{--primary: #1e40af;--primary-light: #3b82f6;--primary-dark: #1e3a8a;--bg: #f8fafc;--bg-card: #ffffff;--bg-sidebar: #1e293b;--text: #1e293b;--text-secondary: #64748b;--text-light: #94a3b8;--border: #e2e8f0;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.1);--shadow-md: 0 4px 6px rgba(0,0,0,.1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.auth-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e40af,#3b82f6,#60a5fa);padding:20px}.auth-card{background:#fff;border-radius:16px;padding:40px;width:100%;max-width:420px;box-shadow:0 20px 60px #0000004d}.auth-card h1{font-size:24px;text-align:center;color:var(--primary);margin-bottom:8px}.auth-card .subtitle{text-align:center;color:var(--text-secondary);font-size:14px;margin-bottom:32px}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:14px;font-weight:500;margin-bottom:6px;color:var(--text)}.form-group input{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius);font-size:15px;transition:border-color .2s;outline:none}.form-group input:focus{border-color:var(--primary-light);box-shadow:0 0 0 3px #3b82f626}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:none;border-radius:var(--radius);font-size:15px;font-weight:500;cursor:pointer;transition:all .2s}.btn-primary{background:var(--primary);color:#fff;width:100%}.btn-primary:hover{background:var(--primary-dark)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#dc2626}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-outline:hover{background:var(--bg)}.btn-sm{padding:6px 12px;font-size:13px}.auth-link{text-align:center;margin-top:20px;font-size:14px;color:var(--text-secondary)}.auth-link a{color:var(--primary-light);text-decoration:none;font-weight:500}.auth-link a:hover{text-decoration:underline}.error-msg{background:#fef2f2;color:var(--danger);padding:10px 14px;border-radius:var(--radius);font-size:14px;margin-bottom:16px}.app-layout{display:flex;height:100vh}.sidebar{width:260px;background:var(--bg-sidebar);color:#fff;display:flex;flex-direction:column;flex-shrink:0}.sidebar-header{padding:20px;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar-header h2{font-size:18px;display:flex;align-items:center;gap:8px}.sidebar-header .user-info{font-size:13px;color:var(--text-light);margin-top:8px}.sidebar-nav{flex:1;padding:12px 0;overflow-y:auto}.nav-item{display:flex;align-items:center;gap:10px;padding:12px 20px;color:var(--text-light);text-decoration:none;font-size:14px;transition:all .15s;cursor:pointer;border:none;background:none;width:100%;text-align:left}.nav-item:hover{background:#ffffff14;color:#fff}.nav-item.active{background:#3b82f64d;color:#fff;border-right:3px solid var(--primary-light)}.sidebar-footer{padding:16px 20px;border-top:1px solid rgba(255,255,255,.1)}.main-content{flex:1;overflow:hidden;display:flex;flex-direction:column}.chat-container{display:flex;flex-direction:column;height:100%}.chat-header{padding:16px 24px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:16px}.chat-header h3{font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-header-actions{display:flex;gap:8px}.chat-messages{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:16px}.message{max-width:80%;padding:14px 18px;border-radius:12px;font-size:14px;line-height:1.7;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message.user{align-self:flex-end;background:var(--primary);color:#fff;border-bottom-right-radius:4px}.message.assistant{align-self:flex-start;background:#fff;border:1px solid var(--border);border-bottom-left-radius:4px;box-shadow:var(--shadow)}.message.assistant h1,.message.assistant h2,.message.assistant h3{margin:12px 0 8px;font-size:16px}.message.assistant ul,.message.assistant ol{padding-left:20px;margin:8px 0}.message.assistant table{width:100%;border-collapse:collapse;margin:12px 0;font-size:13px}.message.assistant th,.message.assistant td{border:1px solid var(--border);padding:8px 12px;text-align:left}.message.assistant th{background:#f1f5f9;font-weight:600}.message.assistant strong{color:var(--primary-dark)}.message.assistant code{background:#f1f5f9;padding:2px 6px;border-radius:3px;font-size:13px}.chat-input-area{padding:16px 24px;background:#fff;border-top:1px solid var(--border)}.chat-input-wrapper{display:flex;gap:12px;align-items:flex-end}.chat-input-wrapper textarea{flex:1;padding:12px 16px;border:1px solid var(--border);border-radius:12px;font-size:14px;resize:none;max-height:120px;font-family:inherit;outline:none;transition:border-color .2s}.chat-input-wrapper textarea:focus{border-color:var(--primary-light);box-shadow:0 0 0 3px #3b82f61a}.chat-input-wrapper button{padding:12px;border-radius:12px;background:var(--primary);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.chat-input-wrapper button:hover{background:var(--primary-dark)}.chat-input-wrapper button:disabled{opacity:.5;cursor:not-allowed}.welcome-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;color:var(--text-secondary);padding:40px}.welcome-screen .icon{font-size:64px;margin-bottom:20px}.welcome-screen h2{font-size:22px;color:var(--text);margin-bottom:8px}.welcome-screen p{font-size:14px;max-width:500px;margin-bottom:24px}.sessions-container{height:100%;overflow-y:auto}.sessions-header{padding:20px 24px;background:#fff;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.sessions-header h2{font-size:20px}.session-list{padding:16px 24px}.session-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;transition:all .15s}.session-card:hover{border-color:var(--primary-light);box-shadow:var(--shadow-md)}.session-card-info h4{font-size:15px;margin-bottom:4px}.session-card-info .meta{font-size:12px;color:var(--text-secondary);display:flex;gap:16px}.status-badge{display:inline-block;padding:2px 8px;border-radius:12px;font-size:11px;font-weight:500}.status-badge.active{background:#dbeafe;color:var(--primary)}.status-badge.completed{background:#d1fae5;color:#065f46}.reports-container{height:100%;overflow-y:auto}.reports-header{padding:20px 24px;background:#fff;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:16px}.reports-header h2{font-size:20px}.search-box{display:flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:8px 14px}.search-box input{border:none;background:transparent;outline:none;font-size:14px;width:200px}.report-list{padding:16px 24px}.report-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:12px;transition:all .15s}.report-card:hover{border-color:var(--primary-light);box-shadow:var(--shadow-md)}.report-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}.report-card h4{font-size:16px;margin-bottom:4px}.report-card .meta{font-size:12px;color:var(--text-secondary)}.report-card-actions{display:flex;gap:6px}.report-preview{font-size:13px;color:var(--text-secondary);line-height:1.6;max-height:80px;overflow:hidden;position:relative}.report-preview:after{content:"";position:absolute;bottom:0;left:0;right:0;height:30px;background:linear-gradient(transparent,#fff)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal{background:#fff;border-radius:16px;width:100%;max-width:900px;max-height:90vh;display:flex;flex-direction:column;box-shadow:0 20px 60px #0000004d}.modal-header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.modal-body{padding:24px;overflow-y:auto;flex:1;font-size:14px;line-height:1.7}.modal-body h1{font-size:22px;margin-bottom:12px;color:var(--primary)}.modal-body h2{font-size:18px;margin:20px 0 12px;color:var(--primary-dark)}.modal-body h3{font-size:15px;margin:16px 0 8px}.modal-body table{width:100%;border-collapse:collapse;margin:12px 0;font-size:13px}.modal-body th,.modal-body td{border:1px solid var(--border);padding:8px 12px;text-align:left}.modal-body th{background:#f1f5f9;font-weight:600}.modal-body ul,.modal-body ol{padding-left:24px;margin:8px 0}.modal-body strong{color:var(--primary-dark)}.modal-footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;gap:8px;justify-content:flex-end}.loading{display:flex;align-items:center;justify-content:center;padding:40px;color:var(--text-secondary);gap:8px}.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:60px 20px;color:var(--text-secondary)}.empty-state .icon{font-size:48px;margin-bottom:12px}.empty-state h3{font-size:16px;margin-bottom:6px;color:var(--text)}.empty-state p{font-size:14px}.typing-indicator{display:flex;gap:4px;padding:14px 18px}.typing-indicator span{width:8px;height:8px;border-radius:50%;background:var(--text-light);animation:typing 1.4s infinite}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-6px);opacity:1}}@media (max-width: 768px){.sidebar{width:60px}.sidebar-header h2 span,.sidebar-header .user-info,.nav-item span,.sidebar-footer button span{display:none}.nav-item{justify-content:center;padding:12px}.message{max-width:90%}.modal{max-width:95%;margin:10px}}@media print{.sidebar,.chat-header,.chat-input-area,.modal-footer,.btn{display:none!important}.main-content{overflow:visible}.modal-overlay{position:static;background:none}.modal{box-shadow:none;max-height:none}.modal-body{overflow:visible}}