.landing{min-height:100vh;display:flex;flex-direction:column}.landing-nav{display:flex;justify-content:space-between;align-items:center;padding:20px 40px;max-width:1400px;margin:0 auto;width:100%}.logo{display:flex;align-items:center;gap:10px;font-size:1.5rem;font-weight:700}.logo-icon{font-size:1.8rem}.logo-text{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.landing-hero{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;text-align:center}.hero-content{max-width:700px;margin-bottom:60px}.hero-title{font-size:clamp(2.5rem,6vw,4rem);font-weight:800;line-height:1.1;margin-bottom:24px}.gradient-text{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.25rem;color:var(--text-secondary);margin-bottom:32px;line-height:1.7}.hero-cta{display:flex;flex-direction:column;align-items:center;gap:12px}.btn-lg{padding:16px 40px;font-size:1.1rem}.hero-note{color:var(--text-muted);font-size:.9rem}.hero-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;max-width:800px;width:100%}.feature-card{background:var(--bg-card);padding:32px 24px;border-radius:var(--border-radius);transition:transform .2s ease}.feature-card:hover{transform:translateY(-4px)}.feature-icon{font-size:2.5rem;margin-bottom:16px}.feature-card h3{font-size:1.1rem;margin-bottom:8px}.feature-card p{color:var(--text-secondary);font-size:.95rem}.landing-footer{padding:30px 20px;text-align:center;border-top:1px solid rgba(255,255,255,.05)}.disclaimer{color:var(--warning);font-size:.9rem;margin-bottom:12px}.disclaimer a{color:var(--warning);font-weight:600}.copyright{color:var(--text-muted);font-size:.85rem}@media(max-width:768px){.landing-nav{padding:16px 20px}.logo{font-size:1.2rem}.hero-features{grid-template-columns:1fr;max-width:400px}.feature-card{padding:24px 20px}}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;position:relative}.auth-back{position:absolute;top:20px;left:20px;color:var(--text-secondary);font-weight:500;padding:8px 16px;border-radius:var(--border-radius-sm);transition:all .2s ease}.auth-back:hover{background:var(--bg-card);color:var(--text-primary);text-decoration:none}.auth-container{width:100%;max-width:420px;background:var(--bg-card);border-radius:var(--border-radius);padding:40px}.auth-header{text-align:center;margin-bottom:32px}.auth-logo{font-size:3rem;display:block;margin-bottom:16px}.auth-header h1{font-size:1.75rem;margin-bottom:8px}.auth-header p{color:var(--text-secondary)}.auth-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:8px}.form-group label{font-weight:500;font-size:.95rem;color:var(--text-secondary)}.btn-full{width:100%;margin-top:8px}.auth-error{background:#ef44441a;border:1px solid var(--error);color:var(--error);padding:12px 16px;border-radius:var(--border-radius-sm);font-size:.9rem}.auth-switch{text-align:center;margin-top:24px;color:var(--text-secondary)}.link-btn{background:none;border:none;color:var(--primary);font-weight:600;cursor:pointer;font-size:inherit}.link-btn:hover{text-decoration:underline}.auth-terms{text-align:center;font-size:.8rem;color:var(--text-muted);margin-top:24px;line-height:1.5}@media(max-width:480px){.auth-container{padding:30px 24px}}.chat-layout{display:flex;height:100vh;overflow:hidden}.chat-sidebar{width:280px;background:var(--bg-card);display:flex;flex-direction:column;border-right:1px solid rgba(255,255,255,.05);flex-shrink:0}.sidebar-header{padding:20px;border-bottom:1px solid rgba(255,255,255,.05)}.sidebar-logo{font-weight:700;font-size:1.1rem;margin-bottom:16px;background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.sidebar-header .btn{width:100%}.conversations-list{flex:1;overflow-y:auto;padding:12px}.no-conversations{color:var(--text-muted);text-align:center;padding:20px;font-size:.9rem}.conversation-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-radius:var(--border-radius-sm);cursor:pointer;transition:background .2s ease;margin-bottom:4px}.conversation-item:hover{background:var(--bg-input)}.conversation-item.active{background:var(--bg-input);border-left:3px solid var(--primary)}.conversation-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.9rem}.delete-btn{background:none;border:none;color:var(--text-muted);font-size:1.2rem;padding:4px 8px;cursor:pointer;opacity:0;transition:all .2s ease}.conversation-item:hover .delete-btn{opacity:1}.delete-btn:hover{color:var(--error)}.sidebar-footer{padding:16px 20px;border-top:1px solid rgba(255,255,255,.05)}.user-info{margin-bottom:12px}.user-email{font-weight:500;font-size:.9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.message-count{font-size:.8rem;color:var(--text-muted);margin-top:4px}.pro-badge{display:inline-block;background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);color:#fff;font-size:.7rem;font-weight:700;padding:2px 8px;border-radius:10px;margin-top:4px}.sidebar-toggle{display:none;position:fixed;top:16px;left:16px;z-index:100;background:var(--bg-card);border:none;color:var(--text-primary);font-size:1.5rem;padding:8px 12px;border-radius:var(--border-radius-sm);cursor:pointer}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0}.chat-welcome{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px;max-width:500px;margin:0 auto}.welcome-icon{font-size:4rem;margin-bottom:20px}.chat-welcome h2{font-size:1.75rem;margin-bottom:16px}.chat-welcome p{color:var(--text-secondary);margin-bottom:12px;line-height:1.6}.welcome-hint{font-weight:600;color:var(--text-primary)!important;margin-top:20px!important;margin-bottom:24px!important}.welcome-disclaimer{font-size:.85rem;color:var(--warning)!important;margin-top:24px!important}.messages-container{flex:1;overflow-y:auto;padding:20px}.empty-chat{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-muted)}.message{display:flex;gap:12px;margin-bottom:20px;animation:fadeIn .3s ease}.message.user{justify-content:flex-end}.message-avatar{width:36px;height:36px;background:var(--bg-input);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}.message-content{max-width:70%;padding:14px 18px;border-radius:var(--border-radius);line-height:1.6;white-space:pre-wrap}.message.assistant .message-content{background:var(--bg-card)}.message.user .message-content{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);color:#fff}.typing{display:flex;gap:4px;padding:16px 20px!important}.typing .dot{width:8px;height:8px;background:var(--text-muted);border-radius:50%;animation:bounce 1.4s infinite ease-in-out}.typing .dot:nth-child(1){animation-delay:0s}.typing .dot:nth-child(2){animation-delay:.2s}.typing .dot:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{transform:translateY(0)}40%{transform:translateY(-6px)}}.chat-error{background:#ef44441a;border:1px solid var(--error);color:var(--error);padding:12px 20px;margin:0 20px 10px;border-radius:var(--border-radius-sm);font-size:.9rem}.limit-warning{background:#f59e0b1a;border:1px solid var(--warning);color:var(--warning);padding:10px 20px;margin:0 20px 10px;border-radius:var(--border-radius-sm);font-size:.85rem;text-align:center}.chat-input-form{display:flex;gap:12px;padding:20px;background:var(--bg-dark);border-top:1px solid rgba(255,255,255,.05)}.chat-input{flex:1;padding:14px 18px;background:var(--bg-input);border:2px solid transparent;border-radius:var(--border-radius);color:var(--text-primary);font-size:1rem;resize:none;min-height:50px;max-height:150px;line-height:1.5}.chat-input:focus{outline:none;border-color:var(--primary)}.chat-input::placeholder{color:var(--text-muted)}.chat-input:disabled{opacity:.5;cursor:not-allowed}.send-btn{align-self:flex-end}.send-btn:disabled{opacity:.5;cursor:not-allowed}.sidebar-overlay{display:none}@media(max-width:768px){.chat-sidebar{position:fixed;left:-280px;top:0;height:100vh;z-index:200;transition:left .3s ease}.chat-sidebar.open{left:0}.sidebar-toggle{display:block}.sidebar-overlay{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:150}.message-content{max-width:85%}.chat-welcome{padding:20px}}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:16px;color:var(--text-secondary)}.loading-spinner{width:40px;height:40px;border:3px solid var(--bg-input);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #ff6b9d;--primary-dark: #e85a8a;--primary-light: #ffb3cb;--secondary: #7c3aed;--secondary-light: #a78bfa;--bg-dark: #1a1a2e;--bg-card: #16213e;--bg-input: #0f3460;--text-primary: #ffffff;--text-secondary: #a0aec0;--text-muted: #718096;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--border-radius: 16px;--border-radius-sm: 8px}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:linear-gradient(135deg,var(--bg-dark) 0%,#0f0f23 100%);color:var(--text-primary);min-height:100vh;line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit}input,textarea{font-family:inherit}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-dark)}::-webkit-scrollbar-thumb{background:var(--bg-input);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.container{max-width:1200px;margin:0 auto;padding:0 20px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:var(--border-radius-sm);font-weight:600;font-size:1rem;transition:all .2s ease;border:none;gap:8px}.btn-primary{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 20px #ff6b9d66}.btn-secondary{background:var(--bg-input);color:var(--text-primary)}.btn-secondary:hover{background:var(--bg-card)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{color:var(--text-primary);background:#ffffff1a}.input{width:100%;padding:14px 18px;background:var(--bg-input);border:2px solid transparent;border-radius:var(--border-radius-sm);color:var(--text-primary);font-size:1rem;transition:all .2s ease}.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #ff6b9d33}.input::placeholder{color:var(--text-muted)}.card{background:var(--bg-card);border-radius:var(--border-radius);padding:24px}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .3s ease forwards}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.pulse{animation:pulse 1.5s ease-in-out infinite}@media(max-width:768px){.container{padding:0 16px}.btn{padding:10px 20px}}