:root{--primary-color:#2563eb;--primary-dark:#1d4ed8;--secondary-color:#06b6d4;--accent-color:#f59e0b;--text-primary:#1f2937;--text-secondary:#6b7280;--text-light:#9ca3af;--background:#fff;--background-secondary:#f8fafc;--surface:#fff;--border:#e5e7eb;--shadow:rgba(0,0,0,.1);--gradient-primary:linear-gradient(135deg,#2563eb,#06b6d4);--gradient-secondary:linear-gradient(135deg,#f59e0b,#ef4444)}.dark-theme{--text-primary:#f9fafb;--text-secondary:#d1d5db;--text-light:#9ca3af;--background:#0f172a;--background-secondary:#1e293b;--surface:#334155;--border:#475569;--shadow:rgba(0,0,0,.3)}*{margin:0;padding:0;box-sizing:border-box;font-family:Google Sans,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}html{scroll-behavior:smooth}body{color:var(--text-primary);background:var(--background);line-height:1.6;font-size:16px}.landing-page{width:100%;overflow-x:hidden}.header{position:fixed;top:0;left:0;right:0;background:hsla(0,0%,100%,.9);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:1000;padding:1rem 5%;display:flex;justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto}.header-auth,.header-nav,.header-user{display:flex;align-items:center;gap:1rem}.header-link{color:var(--text-primary);text-decoration:none;font-weight:500;transition:color .2s ease}.header-link:hover{color:var(--primary-color)}.back-button{position:fixed;top:20px;left:20px;color:var(--text-primary);background:var(--surface);display:flex;align-items:center;gap:8px;text-decoration:none;padding:8px 16px;border-radius:8px;font-size:14px;font-weight:500;border:1px solid var(--border);transition:all .2s ease;z-index:1001}.back-button:hover{background:var(--background-secondary);transform:translateY(-1px)}.hero-section{display:flex;align-items:center;justify-content:space-between;min-height:100vh;padding:2rem 5%;max-width:1200px;margin:0 auto;gap:4rem}.hero-content{flex:1 1;max-width:600px}.hero-title{font-size:4rem;font-weight:700;background:var(--gradient-primary);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:1rem;line-height:1.1}.hero-subtitle{font-size:1.5rem;color:var(--text-secondary);margin-bottom:1.5rem;font-weight:500}.hero-description{font-size:1.125rem;color:var(--text-secondary);margin-bottom:2.5rem;line-height:1.7}.hero-actions{display:flex;gap:1rem;flex-wrap:wrap}.hero-visual{flex:1 1;display:flex;justify-content:center;align-items:center}.visual-element{position:relative;width:400px;height:400px}.trend-bubble{position:absolute;background:var(--surface);border:1px solid var(--border);border-radius:50px;padding:.75rem 1.25rem;font-size:.875rem;font-weight:500;color:var(--text-primary);box-shadow:0 4px 12px var(--shadow);animation:float 6s ease-in-out infinite}.trend-bubble:first-child{top:20%;left:10%;animation-delay:0s}.trend-bubble:nth-child(2){top:10%;right:20%;animation-delay:1s}.trend-bubble:nth-child(3){bottom:30%;left:20%;animation-delay:2s}.trend-bubble:nth-child(4){bottom:20%;right:10%;animation-delay:3s}.trend-bubble:nth-child(5){top:50%;left:50%;transform:translate(-50%,-50%);animation-delay:4s}@keyframes float{0%,to{transform:translateY(0) rotate(0deg)}33%{transform:translateY(-10px) rotate(1deg)}66%{transform:translateY(5px) rotate(-1deg)}}.cta-button{padding:1rem 2rem;border-radius:12px;border:none;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.cta-button.primary{background:var(--gradient-primary);color:#fff;box-shadow:0 4px 12px rgba(37,99,235,.3)}.cta-button.primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(37,99,235,.4)}.cta-button.secondary{background:var(--surface);color:var(--text-primary);border:1px solid var(--border)}.cta-button.secondary:hover{background:var(--background-secondary);transform:translateY(-2px)}.cta-button.large{padding:1.25rem 2.5rem;font-size:1.125rem}.cta-button.small{padding:.5rem 1rem;font-size:.875rem}.benefits-section,.cta-section,.features-section{padding:5rem 5%;max-width:1200px;margin:0 auto}.section-header{text-align:center;margin-bottom:3rem}.section-header h2{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:1rem}.section-header p{font-size:1.125rem;color:var(--text-secondary)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:2rem;gap:2rem}.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:2rem;text-align:center;transition:all .2s ease}.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 24px var(--shadow)}.feature-icon{font-size:3rem;margin-bottom:1rem}.feature-card h3{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:1rem}.feature-card p{color:var(--text-secondary);line-height:1.6}.benefits-grid{display:flex;flex-direction:column;gap:2rem}.benefit-item{display:flex;align-items:flex-start;gap:2rem;padding:2rem;background:var(--surface);border:1px solid var(--border);border-radius:16px;transition:all .2s ease}.benefit-item:hover{transform:translateX(8px);box-shadow:0 8px 24px var(--shadow)}.benefit-number{flex-shrink:0;width:60px;height:60px;background:var(--gradient-primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.25rem;font-weight:700}.benefit-content h3{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem}.benefit-content p{color:var(--text-secondary);line-height:1.6}.cta-section{background:var(--background-secondary);text-align:center}.cta-content h2{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:1rem}.cta-content p{font-size:1.125rem;color:var(--text-secondary);margin-bottom:2rem}@media (max-width:768px){.hero-section{flex-direction:column;text-align:center;padding:2rem 1rem;gap:2rem}.hero-title{font-size:2.5rem}.hero-subtitle{font-size:1.25rem}.visual-element{width:300px;height:300px}.benefits-section,.cta-section,.features-section{padding:3rem 1rem}.section-header h2{font-size:2rem}.benefit-item{flex-direction:column;text-align:center;gap:1rem}.hero-actions{justify-content:center}}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem 1rem;background:var(--background-secondary)}.auth-container{width:100%;max-width:400px}.auth-form-container{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:2rem;box-shadow:0 8px 24px var(--shadow)}.auth-form{display:flex;flex-direction:column;gap:1.5rem}.auth-title{font-size:2rem;font-weight:700;color:var(--text-primary);text-align:center;margin-bottom:.5rem}.auth-error{background:#fef2f2;color:#dc2626;padding:.75rem;border-radius:8px;font-size:.875rem;border:1px solid #fecaca}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:500;color:var(--text-primary);font-size:.875rem}.form-input{padding:.75rem;border:1px solid var(--border);border-radius:8px;font-size:1rem;transition:border-color .2s ease,box-shadow .2s ease;background:var(--background);color:var(--text-primary)}.form-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(37,99,235,.1)}.auth-submit{margin-top:.5rem}.auth-links{margin-top:1.5rem;text-align:center;display:flex;flex-direction:column;gap:.75rem}.auth-links p{color:var(--text-secondary);font-size:.875rem}.auth-link{color:var(--primary-color);text-decoration:none;font-weight:500;transition:color .2s ease}.auth-link:hover{color:var(--primary-dark);text-decoration:underline}.auth-success{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:2rem;text-align:center;box-shadow:0 8px 24px var(--shadow)}.auth-success h1{font-size:1.5rem;font-weight:700;color:var(--text-primary);margin-bottom:1rem}.auth-success p{color:var(--text-secondary);line-height:1.6;margin-bottom:1rem}.dashboard-page{min-height:100vh;padding-top:80px;background:var(--background-secondary)}.dashboard-container{max-width:1200px;margin:0 auto;padding:2rem 5%}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:3rem;padding-bottom:2rem;border-bottom:1px solid var(--border)}.dashboard-header h1{font-size:2.5rem;font-weight:700;color:var(--text-primary)}.user-info{display:flex;align-items:center;gap:1rem}.user-info span{color:var(--text-secondary);font-weight:500}.welcome-section{text-align:center;margin-bottom:3rem}.welcome-section h2{font-size:2rem;font-weight:600;color:var(--text-primary);margin-bottom:1rem}.welcome-section p{color:var(--text-secondary);font-size:1.125rem;line-height:1.6;max-width:600px;margin:0 auto}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:2rem;gap:2rem}.dashboard-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:2rem;text-align:center;transition:all .2s ease}.dashboard-card:hover{transform:translateY(-4px);box-shadow:0 12px 24px var(--shadow)}.dashboard-card .card-icon{font-size:3rem;margin-bottom:1rem}.dashboard-card h3{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin-bottom:.75rem}.dashboard-card p{color:var(--text-secondary);line-height:1.6;margin-bottom:1.5rem}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:200px;gap:1rem}.loading-spinner{width:40px;height:40px;border-top:3px solid var(--border);border:3px solid var(--border);border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@media (max-width:768px){.auth-container{padding:0 1rem}.dashboard-header{flex-direction:column;gap:1rem;text-align:center}.dashboard-header h1{font-size:2rem}.user-info{flex-direction:column;gap:.5rem}.header{padding:1rem 2%}.header-auth,.header-nav,.header-user{gap:.5rem}}