*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;color:#333}.container{max-width:1200px;margin:0 auto;padding:0 20px}.navbar{background:rgba(255,255,255,.95);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 2px 20px #0000001a;position:sticky;top:0;z-index:100}.nav-content{display:flex;justify-content:space-between;align-items:center;padding:1rem 0}.logo{font-size:1.5rem;font-weight:700;color:#667eea;text-decoration:none}.nav-links{display:flex;list-style:none;gap:2rem}.nav-links a{text-decoration:none;color:#333;font-weight:500;transition:color .3s ease;padding:.5rem 1rem;border-radius:8px}.nav-links a:hover,.nav-links a.active{color:#667eea;background:rgba(102,126,234,.1)}.mobile-menu-btn{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer}.hero{text-align:center;padding:4rem 0;color:#fff}.hero h1{font-size:3.5rem;margin-bottom:1rem;font-weight:700}.hero p{font-size:1.3rem;opacity:.9;margin-bottom:2rem}.calculator-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-top:2rem}.calculator-card{background:white;padding:2rem;border-radius:16px;box-shadow:0 10px 30px #0000001a;text-decoration:none;color:inherit;transition:all .3s ease;border:2px solid transparent}.calculator-card:hover{transform:translateY(-5px);box-shadow:0 20px 40px #00000026;border-color:#667eea}.calculator-icon{font-size:3rem;display:block;margin-bottom:1rem}.calculator-card h3{font-size:1.5rem;margin-bottom:1rem;color:#2d3748}.calculator-card p{color:#718096;line-height:1.6}.calculator-page{min-height:100vh;padding:2rem 0}.calculator-header{text-align:center;margin-bottom:3rem;color:#fff}.calculator-header h1{font-size:2.5rem;margin-bottom:1rem}.calculator-header p{font-size:1.1rem;opacity:.9}.calculator-content{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}.calculator-form{background:white;padding:2rem;border-radius:16px;box-shadow:0 10px 30px #0000001a}.calculator-form h2{margin-bottom:1.5rem;color:#2d3748;border-bottom:2px solid #e2e8f0;padding-bottom:.5rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:600;color:#4a5568}.form-group input,.form-group select{width:100%;padding:.75rem;border:2px solid #e2e8f0;border-radius:8px;font-size:1rem;transition:border-color .3s ease}.form-group input:focus,.form-group select:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.checkbox-group{margin-bottom:1.5rem}.checkbox-group label{display:flex;align-items:center;gap:.5rem;cursor:pointer;font-weight:500}.checkbox-group input[type=checkbox]{width:auto}.calculate-btn{width:100%;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;border:none;padding:1rem 2rem;border-radius:8px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.calculate-btn:hover{transform:translateY(-2px);box-shadow:0 10px 20px #667eea4d}.results-section{background:white;padding:2rem;border-radius:16px;box-shadow:0 10px 30px #0000001a}.results-section h2{margin-bottom:1.5rem;color:#2d3748;border-bottom:2px solid #e2e8f0;padding-bottom:.5rem}.results-grid{display:grid;grid-template}