*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:Arial,sans-serif;background:#f0f0f0;}
.pond_liner_calculator.calc-wrap{max-width:100%;margin:30px auto;padding:0 16px;}
.pond_liner_calculator.calc-wrap .hero{background:linear-gradient(rgba(30,30,30,0.6),rgba(30,30,30,0.65)),url('../image/calculator-liner-image.webp') center/cover no-repeat;border-radius:10px;padding:52px 24px 38px;text-align:center;color:#fff;}
.pond_liner_calculator.calc-wrap .hero h1{font-size:32px;font-weight:700;margin-bottom:10px;letter-spacing:0.3px;color:#fff;font-family:"Jost",Sans-serif;}
.pond_liner_calculator.calc-wrap .hero p{font-size:18px;margin-bottom:0px;font-family:"Lato",Sans-serif;}
.pond_liner_calculator.calc-wrap .controls{display:flex;flex-wrap:wrap;align-items:center;gap:12px;justify-content:center;background:transparent;border-radius:8px;padding:28px 24px;}
.pond_liner_calculator.calc-wrap .field{display:flex;align-items:center;gap:8px;background:#fff;border-radius:5px;padding:10px 14px;}
.pond_liner_calculator.calc-wrap .field label{color:#333;font-size:14px;font-weight:600;white-space:nowrap;}
.pond_liner_calculator.calc-wrap .field input{border:none;outline:none;font-size:14px;color:#999;width:80px;background:transparent;}
.pond_liner_calculator.calc-wrap .field input:focus{color:#333;}
.pond_liner_calculator.calc-wrap .calc-btn{background:#e05a2b;color:#fff;border:none;border-radius:5px;padding:12px 28px;font-size:14px;font-weight:700;cursor:pointer;letter-spacing:0.8px;white-space:nowrap;transition:background 0.15s;}
.pond_liner_calculator.calc-wrap button.calc-btn{min-width:153px;font-family:"Open Sans",Sans-serif;font-size:13px;font-weight:700;line-height:18px;fill:#FFFFFF;color:#FFFFFF;--loader-side-color:#FFFFFF;background-color:#52B4CC;padding:12px 30px 12px 30px;border-radius:2px;transform:skewX(-10deg);}
.pond_liner_calculator.calc-wrap .calc-btn:hover{background-color:#DB2D2F;}
.pond_liner_calculator.calc-wrap .result-row{margin-top:14px;background:hsla(192,54%,56%,0.82);border-radius:8px;padding:24px 20px;text-align:center;font-size:20px;color:#fff;font-weight:400;display:none;font-family:"Lato",Sans-serif;}
.pond_liner_calculator.calc-wrap .result-row strong{font-weight:700;}

/* Formula explanation section */
.pond_liner_calculator.calc-wrap .info-section{background:#fff;border-radius:10px;padding:30px 28px;margin-top:20px;border:1px solid #e0e0e0;display:none;}
.pond_liner_calculator.calc-wrap .info-section{display:none!important;}
.pond_liner_calculator.calc-wrap .info-section h2{font-size:22px;font-weight:700;color:#222;margin-bottom:12px;}
.pond_liner_calculator.calc-wrap .info-section p{font-size:14px;color:#555;line-height:1.7;margin-bottom:24px;}

/* Diagram */
.pond_liner_calculator.calc-wrap .diagrams{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:28px;}
.pond_liner_calculator.calc-wrap .diagram-box{text-align:center;}
.pond_liner_calculator.calc-wrap .diagram-box p{font-size:13px;color:#1a8fa0;font-weight:600;margin-top:8px;margin-bottom:0;}

/* Formula breakdown */
.pond_liner_calculator.calc-wrap .formula-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px;}
.pond_liner_calculator.calc-wrap .formula-card{background:#f4fbfc;border:1px solid #b2e0ea;border-radius:8px;padding:16px 18px;font-size:13px;color:#444;line-height:1.8;}
.pond_liner_calculator.calc-wrap .formula-card strong{display:block;font-size:14px;color:#1a8fa0;margin-bottom:6px;}
.pond_liner_calculator.calc-wrap .example-box{background:#f9f9f9;border-left:4px solid #41bed2;border-radius:0 8px 8px 0;padding:16px 18px;margin-top:20px;font-size:13px;color:#444;line-height:1.9;}
.pond_liner_calculator.calc-wrap .example-box strong{color:#222;}
@media (max-width:640px){
 .pond_liner_calculator.calc-wrap .diagrams{grid-template-columns:1fr;}
 .pond_liner_calculator.calc-wrap .formula-cards{grid-template-columns:1fr;}
 .pond_liner_calculator.calc-wrap .field input{width:65px;}
 .pond_liner_calculator.calc-wrap .hero h1{font-size:24px;}
}