body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;margin:0;padding:0;background:#f0f2f5;color:#333;display:flex;flex-direction:column;min-height:100vh}header{background:#2c3e50;color:#fff;padding:1.5rem 2rem;box-shadow:0 2px 4px rgba(0,0,0,.1);display:flex;align-items:center;justify-content:space-between}#header-content{display:flex;align-items:center;flex-grow:1;justify-content:center;position:relative}#header-logo{width:80px;height:auto;margin-right:15px}header h1{margin:0;font-size:2.5rem}.back-to-homepage{position:absolute;left:20px;top:50%;transform:translateY(-50%);color:#fff;text-decoration:none;font-size:1.5rem;padding:10px;border:none;background:transparent;transition:color .3s ease}.back-to-homepage:hover{color:#3498db;background:transparent}#unit-toggle{display:none}#unit-toggle label{margin-right:.5rem;font-size:1.1rem}#unit-toggle select{padding:8px 12px;border-radius:5px;border:none;background-color:#f4f4f4;color:#333;font-size:1rem;cursor:pointer;outline:none}main{flex:1;padding:3rem 2rem;max-width:1000px;margin:2rem auto;background:#fff;border-radius:12px;box-shadow:0 8px 20px rgba(0,0,0,.08);transition:all .3s ease;position:relative;overflow:hidden}#hero{text-align:center;margin-bottom:3rem;padding:2rem;background:linear-gradient(135deg,#3498db,#2980b9);color:#fff;border-radius:8px;box-shadow:0 4px 8px rgba(0,0,0,.1);position:relative;overflow:hidden}#hero .hero-image{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.3;z-index:0}#hero h2,#hero p{position:relative;z-index:1}#hero h2{font-size:3rem;margin-bottom:1rem}#hero p{font-size:1.2rem;opacity:.9}#calculators{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-bottom:3rem}.calculator-card{background:#f9f9f9;padding:2rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.08);cursor:pointer;transition:transform .3s ease,box-shadow .3s ease;text-align:center;border:1px solid #eee}.calculator-card:hover{transform:translateY(-8px);box-shadow:0 6px 16px rgba(0,0,0,.15)}.calculator-card h3{margin:0;color:#34495e;font-size:1.8rem}.calculator-hero-image{width:100%;height:250px;object-fit:cover;border-radius:12px 12px 0 0;margin-bottom:2rem;filter:brightness(.7)}.hidden{display:none}#calculator-interface,#results,#about-content,#contact-content,#privacy-content{margin-top:2rem;padding:2.5rem 3rem;background:#fff;border-radius:10px;box-shadow:0 5px 15px rgba(0,0,0,.07);display:flex;flex-direction:column;gap:1.5rem}#results-content-wrapper{display:flex;flex-wrap:wrap;justify-content:center;align-items:flex-start;gap:2rem;margin-bottom:2rem}#results-output{flex:1;min-width:300px;text-align:left}#results-output table{width:100%;border-collapse:collapse;margin-top:1rem}#results-output th,#results-output td{border:1px solid #ddd;padding:8px;text-align:left}#results-output th{background-color:#f2f2f2}#results-chart{flex:1;min-width:300px;max-width:500px}#results-actions{text-align:center;margin-top:1.5rem}#results-actions button{background:#007bff;color:#fff;padding:10px 20px;border:none;border-radius:5px;cursor:pointer;font-size:1rem;transition:background-color .3s ease;margin:0 .5rem}#results-actions button:hover{background:#0056b3}#calculator-interface h4{font-size:2rem;color:#2c3e50;margin-bottom:.5rem;text-align:center}.calculator-description{font-size:1.1rem;color:#666;text-align:center;margin-bottom:1.5rem;padding:0 1rem}#calculator-interface label,#contact-form label{display:block;margin-bottom:.6rem;font-weight:600;color:#444;font-size:1.05rem}#calculator-interface input[type=number],#contact-form input[type=text],#contact-form input[type=email],#contact-form textarea{width:100%;padding:12px 15px;margin-bottom:1.5rem;border:1px solid #c9d0d6;border-radius:6px;font-size:1rem;box-sizing:border-box;transition:border-color .3s ease,box-shadow .3s ease}#calculator-interface input[type=number]:focus,#contact-form input:focus,#contact-form textarea:focus{border-color:#3498db;box-shadow:0 0 0 3px rgba(52,152,219,.2);outline:none}#calculator-interface button,#contact-form button[type=submit]{background:#28a745;color:#fff;padding:14px 25px;border:none;border-radius:8px;cursor:pointer;font-size:1.1rem;font-weight:600;transition:background-color .3s ease,transform .2s ease;width:100%;margin-top:1rem}#calculator-interface button:hover{background:#218838}#back-button-container{text-align:center;margin-top:2rem}#back-button-container button{background:#6c757d;color:#fff;padding:14px 25px;border:none;border-radius:8px;cursor:pointer;font-size:1.1rem;font-weight:600;transition:background-color .3s ease,transform .2s ease;width:auto;min-width:200px}#back-button-container button:hover{background:#5a6268;transform:translateY(-2px)}#calculator-interface button{margin-top:0}#results h3{font-size:2rem;color:#2c3e50;margin-bottom:1.5rem;text-align:center}#results-output p{font-size:1rem;font-weight:normal;color:#333;text-align:left;margin-bottom:.5rem}#results-output p strong{font-size:1.2rem;color:#28a745}#affiliate-links{margin-top:2rem;padding-top:1.5rem;border-top:1px dashed #eee;text-align:center}#affiliate-links p{font-size:1.1rem;color:#555;margin-bottom:1rem}#affiliate-links a{display:inline-block;background:#007bff;color:#fff;padding:10px 15px;border-radius:5px;text-decoration:none;margin:0 .5rem;transition:background-color .3s ease}#affiliate-links a:hover{background:#0056b3}aside#ads{margin-top:2rem;text-align:center;background:#e9ecef;padding:1rem;border-radius:8px;min-height:100px;display:flex;align-items:center;justify-content:center;color:#6c757d;font-style:italic}footer{text-align:center;padding:1.5rem 0;margin-top:3rem;background:#34495e;color:#fff;box-shadow:0 -2px 4px rgba(0,0,0,.1)}footer nav a{color:#fff;text-decoration:none;margin:0 15px;font-size:1rem;transition:color .3s ease}footer nav a:hover{color:#3498db}#form-message{margin-top:1rem;text-align:center;font-weight:bold}#form-message.success-message{color:green}#form-message.error-message{color:red}.form-message-link{display:block;margin-top:1rem}