.calculator-container{background-color:#f0f0f0;min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:20px}.calculator-title{text-align:center;font-size:2em;font-weight:700;color:#333;margin-bottom:20px}.chart-container{width:100%;max-width:600px;margin:0 auto 20px}.input-section{display:flex;flex-direction:column;gap:20px;width:100%;margin:20px auto}.input-card{background-color:#fff;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,.1);padding:20px}.input-card h3{margin-top:0;margin-bottom:10px}.input-group label{display:block;margin-bottom:5px}.input-group{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;justify-content:space-between}.years-slider{margin-top:20px;width:100%;max-width:600px;display:flex;justify-content:center;align-items:center}.years-slider label{margin-right:10px}.collapsible{background-color:#777;color:#fff;cursor:pointer;padding:18px;width:100%;border:none;text-align:left;outline:none;font-size:15px}