:root{--bg-color:#fff;--text-color:#0f172a;--nav-bg:#f8fafc;--card-bg:#fff;--card-border:#e2e8f0;--primary-color:#0284c7;--secondary-color:#38bdf8;--accent-color:#0ea5e9;--hover-color:#f1f5f9;--footer-bg:#0f172a;--footer-text:#f8fafc;--button-text:#fff;--shadow-color:#0000001a;--button-bg:#fff;--button-text-color:#0f172a;--button-hover-bg:#f8fafc;--spinner-border:#0000001a;--error-bg:#fee2e2;--error-text:#b91c1c;--heading-font:"Poppins",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--body-font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI","Roboto",sans-serif;--code-font:"Fira Code",source-code-pro,Menlo,Monaco,Consolas,"Courier 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h2{color:var(--text-color);font-size:1.8rem;font-weight:700;margin:0}.login-description{color:var(--text-color);line-height:1.6;margin-bottom:2rem;text-align:center}.login-error{align-items:center;background-color:#fee2e2;background-color:var(--error-bg,#fee2e2);border-radius:8px;color:#b91c1c;color:var(--error-text,#b91c1c);display:flex;gap:.5rem;margin-bottom:1.5rem;padding:.75rem 1rem}.google-signin-button{align-items:center;background-color:#fff;background-color:var(--button-bg,#fff);border:1px solid var(--card-border);border-radius:8px;box-shadow:0 2px 5px var(--shadow-color);color:var(--text-color);cursor:pointer;display:flex;font-size:1rem;font-weight:600;gap:.75rem;justify-content:center;padding:.9rem;transition:all .3s ease;width:100%}.google-signin-button:hover{background-color:#f8fafc;background-color:var(--button-hover-bg,#f8fafc);box-shadow:0 4px 12px var(--shadow-color);transform:translateY(-2px)}[data-theme=dark] .google-signin-button 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var(--shadow-color);justify-content:space-between;padding:1.5rem 2rem;position:-webkit-sticky;position:sticky;top:0;transition:background-color .3s ease,box-shadow .3s ease;z-index:100}.landing-nav,.logo{align-items:center;display:flex}.logo{color:var(--primary-color);font-size:1.5rem;font-weight:700}.logo svg{margin-right:.5rem}.nav-links{align-items:center;display:flex;gap:2rem}.nav-links a{color:var(--text-color);font-weight:500;text-decoration:none;transition:color .3s ease}.nav-links a:hover{color:var(--primary-color)}.cta-button{background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));border-radius:8px;box-shadow:0 4px 12px var(--shadow-color);color:var(--button-text)!important;font-weight:600;padding:.75rem 1.5rem;text-decoration:none;transition:all .3s ease}.cta-button:hover{box-shadow:0 6px 20px #38bdf866;transform:translateY(-2px)}.hero-section{align-items:center;animation:gradientFlow 15s ease infinite;background:linear-gradient(-45deg,#0f172a,#1e293b,#334155,#475569);background-size:400% 400%;display:flex;justify-content:space-between;padding:6rem 2rem}@keyframes gradientFlow{0%{background-position:0 50%}50%{background-position:100% 50%}to{background-position:0 50%}}.hero-content{max-width:600px}.hero-content h1{color:#fff;font-size:3.5rem;font-weight:800;letter-spacing:-.5px;margin-bottom:1.5rem;text-shadow:0 2px 10px #0000004d}.hero-content p{color:#e2e8f0;font-size:1.2rem;line-height:1.7;margin-bottom:2rem}.hero-image{align-items:center;display:flex;justify-content:center}.features-section{background-color:var(--bg-color);padding:6rem 2rem;text-align:center}.features-section h2{color:var(--text-color);font-size:2.5rem;font-weight:700;margin-bottom:3rem}.features-grid{grid-gap:2rem;display:grid;gap:2rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin:0 auto;max-width:1200px}.feature-card{background-color:var(--card-bg);border:1px solid var(--card-border);border-radius:12px;box-shadow:0 4px 15px var(--shadow-color);padding:2rem;transition:transform .3s ease,box-shadow .3s ease}.feature-card:hover{box-shadow:0 8px 25px #0000001a;transform:translateY(-5px)}.feature-icon{display:flex;justify-content:center;margin-bottom:1.5rem}.feature-card h3{color:var(--primary-color);font-size:1.5rem;font-weight:600;margin-bottom:1rem}.feature-card p{color:var(--text-color);line-height:1.6}.how-it-works-section{background:linear-gradient(135deg,#f0f9ff,#e0f2fe);padding:6rem 2rem;text-align:center}.how-it-works-section h2{color:#0f172a;font-size:2.5rem;font-weight:700;margin-bottom:3rem}.steps-container{display:flex;flex-wrap:wrap;gap:2rem;justify-content:center;margin:0 auto;max-width:1200px}.step{background-color:#fff;border-radius:12px;box-shadow:0 4px 15px #0000000d;flex:1 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p{color:#334155;line-height:1.6;margin-bottom:2rem}.contact-email{align-items:center;display:flex;gap:1rem;justify-content:center;margin:2rem 0}.email-link{color:#0284c7;font-size:1.2rem;font-weight:500;text-decoration:none;transition:color .3s ease}.email-link:hover{color:#0369a1;text-decoration:underline}.contact-note{color:#64748b;font-size:.9rem;margin-top:1rem}.submit-btn{background:linear-gradient(90deg,#38bdf8,#818cf8);border-radius:8px;padding:.9rem 2rem;width:100%}.landing-footer{background-color:var(--footer-bg);color:var(--footer-text);padding:4rem 2rem 2rem}.footer-content{display:flex;flex-wrap:wrap;gap:3rem;justify-content:space-between;margin:0 auto;max-width:1200px}.footer-logo{align-items:center;color:#fff;display:flex;font-size:1.5rem;font-weight:700;margin-bottom:1rem}.footer-logo svg{margin-right:.5rem}.footer-links{display:flex;flex-wrap:wrap;gap:3rem}.footer-column{min-width:150px}.footer-column 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#0000004d}.animate-on-scroll{opacity:0;transform:translateY(30px);transition:opacity .8s ease,transform .8s ease}.animate-on-scroll.animated{opacity:1;transform:translateY(0)}html{scroll-behavior:smooth}.feature-card:hover{box-shadow:0 15px 30px #00000026;transform:translateY(-10px) scale(1.03);transition:transform .4s ease,box-shadow .4s ease}.step:hover .step-number{box-shadow:0 0 15px #38bdf880;transform:scale(1.1);transition:transform .3s ease,box-shadow .3s ease}.contact-card:hover{box-shadow:0 10px 25px #0000001f;transform:translateY(-5px);transition:transform .4s ease,box-shadow .4s ease}@keyframes pulse{0%{box-shadow:0 0 0 0 #38bdf8b3}70%{box-shadow:0 0 0 10px #38bdf800}to{box-shadow:0 0 0 0 #38bdf800}}.cta-button:hover{animation:pulse 1.5s infinite}.theme-toggle{align-items:center;background:#0000;border:none;border-radius:50%;cursor:pointer;display:flex;justify-content:center;padding:8px;transition:background-color .3s 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.home-link:hover{background-color:#ffffff1a}.user-menu{gap:1rem}.user-info,.user-menu{align-items:center;display:flex}.user-info{background:#0000;border:none;border-radius:8px;gap:.5rem;padding:.5rem 1rem}.user-avatar{border:none;border-radius:50%;height:32px;object-fit:cover;width:32px}.user-name{color:var(--primary-color);font-weight:600}[data-theme=dark] .user-name{color:#fff}.logout-button{align-items:center;background:#0000;border:none;border-radius:8px;color:var(--primary-color);cursor:pointer;display:flex;font-weight:600;gap:.5rem;padding:.5rem 1rem;transition:all .2s ease}.logout-button:hover{background-color:#0284c71a;transform:translateY(-2px)}[data-theme=dark] .logout-button{color:#fff}[data-theme=dark] .logout-button:hover{background-color:#ffffff1a}.history-button{align-items:center;background:#0000;border:none;border-radius:8px;color:var(--primary-color);cursor:pointer;display:flex;font-weight:600;gap:.5rem;margin-right:1rem;padding:.5rem 1rem;transition:all .2s 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p{color:var(--text-color);font-size:1rem;font-weight:500;margin-bottom:.5rem}.model-buttons{display:flex;gap:1rem;justify-content:center}.model-btn{background:#f1f5f9;border:none;border-radius:12px;color:#0f172a;cursor:pointer;flex:1 1;flex-direction:column;font-size:1rem;gap:.5rem;max-width:250px;padding:1rem;transition:all .2s ease}.model-btn,.model-btn .icon{align-items:center;display:flex}.model-btn .icon{font-size:1.8rem;justify-content:center;margin-bottom:.3rem}.model-btn span:nth-child(2){font-family:Poppins,sans-serif;font-size:1.1rem;font-weight:600}.model-desc{color:#64748b;font-family:Inter,sans-serif;font-size:.85rem;line-height:1.5}.model-btn:hover{background:#e2e8f0;box-shadow:0 4px 12px #0000001a;transform:translateY(-2px)}.model-btn:active{background:#cbd5e1}.model-btn.active{background:linear-gradient(135deg,#0284c7,#2563eb);border:none;color:#fff}.model-btn.active .model-desc{color:#fffc}.response-type-selector{margin-bottom:1.5rem;width:100%}.response-type-selector p{color:var(--text-color);font-size:1rem;font-weight:500;margin-bottom:.5rem}.response-type-buttons{display:flex;flex-wrap:nowrap;gap:.5rem;justify-content:center;margin-top:.5rem;overflow-x:auto}.type-btn{align-items:center;background:#f1f5f9;border:none;border-radius:10px;color:#0f172a;cursor:pointer;display:flex;flex-shrink:0;font-family:Inter,sans-serif;font-size:.9rem;font-weight:500;gap:.4rem;height:48px;letter-spacing:-.01em;padding:.8rem;transition:all .2s ease;white-space:nowrap}.type-btn:hover{background:#e2e8f0;box-shadow:0 4px 10px #0000001a;transform:translateY(-2px)}.type-btn:active{background:#cbd5e1}.type-btn.active{background:linear-gradient(135deg,#0284c7,#2563eb);border:none;box-shadow:0 4px 12px #0284c74d;color:#fff}.type-btn .icon{font-size:1.2rem}.submit-btn,.type-btn .icon{align-items:center;display:flex;justify-content:center}.submit-btn{background:linear-gradient(90deg,#0284c7,#38bdf8);border:none;border-radius:10px;box-shadow:0 4px 12px #00000026;color:#fff;cursor:pointer;font-family:Poppins,sans-serif;font-size:1.1rem;font-weight:600;height:55px;letter-spacing:.01em;margin-bottom:3rem;padding:1.1rem 2rem;transition:all .3s ease;width:280px}.submit-btn:hover{box-shadow:0 6px 20px #38bdf866;transform:translateY(-2px)}.submit-btn:disabled{background:linear-gradient(90deg,#64748b,#94a3b8);cursor:not-allowed;transform:none}.response-box{background:var(--card-bg);border:1px solid var(--card-border);border-radius:12px;box-shadow:0 10px 30px var(--shadow-color);color:var(--text-color);font-size:1.1rem;line-height:1.7;max-width:900px;overflow:hidden;padding:2rem;position:relative;transition:background-color .3s ease,color .3s ease,border-color .3s ease;width:100%}.response-box h2{color:#0284c7;font-family:Poppins,sans-serif;font-size:1.5rem;font-weight:600;letter-spacing:-.02em;margin-bottom:1rem}.response-box 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h3{color:#0284c7;font-family:Poppins,sans-serif;letter-spacing:-.02em;line-height:1.3;margin-bottom:1rem;margin-top:1.5rem}.html-content h1{font-size:1.8rem;font-weight:700}.html-content h2{font-size:1.5rem;font-weight:600}.html-content h3{font-size:1.3rem;font-weight:600}.html-content ol,.html-content ul{margin-bottom:1rem;margin-left:1.5rem}.html-content li{margin-bottom:.5rem}.html-content p{font-family:Inter,sans-serif;font-size:1rem;line-height:1.7;margin-bottom:1rem}.html-content table{border-collapse:collapse;display:block;margin-bottom:1.5rem;max-width:100%;overflow-x:auto;width:100%}.html-content td,.html-content th{border:1px solid #e2e8f0;min-width:100px;padding:.75rem;word-break:normal}.html-content th:not([style*=background]){background-color:#f1f5f9;color:#0284c7}.html-content a{color:#0284c7;text-decoration:none}.html-content a:hover{text-decoration:underline}.html-content blockquote{background-color:#f8fafc;border-left:4px solid 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