*{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #f8fafc;--bg-secondary: white;--text-primary: #1a202c;--text-secondary: #4a5568;--border-color: #e2e8f0;--shadow-sm: rgba(0, 0, 0, .1);--shadow-md: rgba(0, 0, 0, .15)}html.dark,body.dark{--bg-primary: #1e3a5f;--bg-secondary: #2d4a6f;--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--border-color: #3d5a7f;--shadow-sm: rgba(0, 0, 0, .3);--shadow-md: rgba(0, 0, 0, .5)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:background-color .3s ease,color .3s ease}.container{max-width:1200px;margin:0 auto;padding:0 2rem}.header{background:var(--bg-secondary);border-bottom:1px solid var(--border-color);padding:1rem 0;position:sticky;top:0;z-index:100;box-shadow:0 1px 3px var(--shadow-sm);transition:background-color .3s ease,border-color .3s ease}.nav{display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.75rem;font-weight:800;background:linear-gradient(135deg,#3b82f6,#2563eb);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;gap:1rem;align-items:center}.nav-link{color:var(--text-secondary);text-decoration:none;font-weight:500;transition:color .2s}.nav-link:hover{color:#3b82f6}.theme-toggle-btn{background:transparent;border:2px solid var(--border-color);color:var(--text-primary);padding:.6rem .8rem;border-radius:50%;cursor:pointer;transition:background var(--duration-slow) ease,border-color var(--duration-slow) ease,color var(--duration-slow) ease,transform var(--duration-slow) ease;display:flex;align-items:center;justify-content:center;width:40px;height:40px;font-size:1rem}.theme-toggle-btn:hover{background:var(--bg-primary);border-color:#3b82f6;color:#3b82f6;transform:rotate(15deg)}.theme-toggle-btn i{transition:transform .3s ease}.sign-in-btn{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;padding:.6rem 1.2rem;border:none;border-radius:50px;font-weight:600;cursor:pointer;transition:transform var(--duration-slow) ease,box-shadow var(--duration-slow) ease;box-shadow:0 4px 15px #3b82f64d;font-size:.9rem}.sign-in-btn:hover{transform:translateY(-3px);box-shadow:0 12px 30px #3b82f666}.main{padding:4rem 0;text-align:center;background:var(--bg-secondary);transition:background-color .3s ease}.hero{margin-bottom:4rem}.hero h1{font-size:3.5rem;font-weight:800;margin-bottom:1rem;background:linear-gradient(135deg,#3b82f6,#2563eb);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero p{font-size:1.25rem;color:var(--text-secondary);max-width:600px;margin:0 auto 2rem}.cta-buttons{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.btn-primary{background:linear-gradient(135deg,#10b981,#059669);color:#fff;padding:1rem 2rem;border:none;border-radius:50px;font-weight:600;cursor:pointer;transition:transform var(--duration-slow) ease,box-shadow var(--duration-slow) ease;text-decoration:none;display:inline-flex;align-items:center;gap:.5rem;box-shadow:0 4px 15px #10b9814d}.btn-primary:hover{transform:translateY(-4px);box-shadow:0 12px 30px #10b98166}.btn-secondary{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;padding:1rem 2rem;border:none;border-radius:50px;font-weight:600;cursor:pointer;transition:transform var(--duration-slow) ease,box-shadow var(--duration-slow) ease;text-decoration:none;display:inline-flex;align-items:center;gap:.5rem;box-shadow:0 4px 15px #3b82f64d}.btn-secondary:hover{transform:translateY(-3px);box-shadow:0 12px 30px #3b82f666}.btn-tertiary{background:linear-gradient(135deg,#60a5fa,#3b82f6);color:#fff;padding:1rem 2rem;border:none;border-radius:50px;font-weight:600;cursor:pointer;transition:transform var(--duration-slow) ease,box-shadow var(--duration-slow) ease;text-decoration:none;display:inline-flex;align-items:center;gap:.5rem;box-shadow:0 4px 15px #60a5fa4d}.btn-tertiary:hover{transform:translateY(-3px);box-shadow:0 12px 30px #60a5fa66}.content-area{background:var(--bg-primary);padding:3rem 2rem 2rem;transition:background-color .3s ease}.section{background:var(--bg-secondary);border-radius:16px;padding:3rem;margin-bottom:2rem;box-shadow:0 4px 20px var(--shadow-md);border:1px solid var(--border-color);transition:background-color var(--duration-slow) ease,border-color var(--duration-slow) ease,box-shadow var(--duration-slow) ease}.section h2{font-size:2rem;font-weight:700;margin-bottom:1rem;background:linear-gradient(135deg,#3b82f6,#2563eb);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.section p{color:var(--text-secondary);margin-bottom:2rem}.plans-section{display:none!important;animation:slideDown .3s ease-out}.plans-section.show{display:block!important}.show-plans-btn{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;padding:1rem 2rem;border:none;border-radius:50px;font-weight:600;cursor:pointer;transition:transform var(--duration-slow) ease,box-shadow var(--duration-slow) ease;display:inline-flex;align-items:center;gap:.5rem;box-shadow:0 4px 15px #3b82f64d}.show-plans-btn:hover{transform:translateY(-3px);box-shadow:0 12px 30px #3b82f666}.tiers-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-top:2rem}.tier-card{background:var(--bg-primary);border:2px solid var(--border-color);border-radius:20px;padding:2rem;transition:transform var(--duration-slow) ease,border-color var(--duration-slow) ease,box-shadow var(--duration-slow) ease;position:relative;overflow:hidden}.tier-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(135deg,#3b82f6,#2563eb)}.tier-card:hover{transform:translateY(-5px);border-color:#3b82f6;box-shadow:0 20px 40px #3b82f633}.tier-name{font-size:1.25rem;font-weight:700;margin-bottom:.5rem;color:var(--text-primary)}.tier-price{font-size:2rem;font-weight:800;background:linear-gradient(135deg,#3b82f6,#2563eb);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:1rem}.tier-features{list-style:none;margin-bottom:2rem}.tier-features li{padding:.5rem 0;color:var(--text-secondary);display:flex;align-items:center}.tier-features li:before{content:"✓";color:#10b981;font-weight:700;margin-right:.75rem;font-size:1.1rem}.tier-btn{width:100%;background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;padding:1rem;border:none;border-radius:12px;font-weight:600;cursor:pointer;transition:transform var(--duration-slow) ease,box-shadow var(--duration-slow) ease;text-decoration:none;display:inline-block;text-align:center}.tier-btn:hover{transform:translateY(-2px);box-shadow:0 10px 25px #3b82f64d}.support-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem;margin-top:2rem}.support-card{background:var(--bg-primary);border:2px solid var(--border-color);border-radius:20px;padding:2rem;text-align:center;transition:transform var(--duration-slow) ease,border-color var(--duration-slow) ease,box-shadow var(--duration-slow) ease;position:relative;overflow:hidden}.support-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(135deg,#3b82f6,#2563eb)}.support-card:hover{transform:translateY(-5px);border-color:#3b82f6;box-shadow:0 20px 40px #3b82f633}.support-icon{width:60px;height:60px;background:linear-gradient(135deg,#3b82f6,#2563eb);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1rem;color:#fff;font-size:1.5rem}.support-card h3{font-size:1.25rem;font-weight:700;margin-bottom:1rem;color:var(--text-primary)}.support-card p{color:var(--text-secondary);margin-bottom:1.5rem}.support-btn{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;padding:.75rem 1.5rem;border:none;border-radius:50px;font-weight:600;cursor:pointer;transition:transform var(--duration-slow) ease,box-shadow var(--duration-slow) ease;text-decoration:none;display:inline-flex;align-items:center;gap:.5rem}.support-btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px #3b82f64d}