img{
    -webkit-user-drag: none;
    user-select: none;
    pointer-events: none;
}

body{
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}


:root{
    --section-gap: 60px;
}

section{
    padding: var(--section-gap) 0;
}

/* =========================================
   HEAT EXCHANGERS PAGE CSS
========================================= */

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:'Poppins',sans-serif;
}

body{
    background:#f5f8fc;
    color:#0b2c4d;
}

/* CONTAINER */
.container{
    width:90%;
    max-width:1200px;
    margin:auto;
}

/* CONTROL ALL SECTION GAPS */
section{
    padding:60px 0;
}

/* Reduce extra heading spacing */
.section-heading{
    margin:40px 0 25px;
}

/* Reduce paragraph spacing in overview */
.product-section p{
    margin-bottom:0;
}

/* =========================================
   HERO SECTION
========================================= */

.product-hero{
    padding:80px 0;
    background:#f8fbff;
}

.product-hero-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:60px;
    align-items:center;
}

/* TEXT */
.product-hero-text span{
    color:#00aaff;
    font-weight:600;
    font-size:13px;
    letter-spacing:1px;
}

.product-hero-text h1{
    font-size:50px;
    margin:15px 0;
}

.product-hero-text p{
    font-size:16px;
    line-height:1.8;
    color:#555;
}

/* BUTTONS */
.product-buttons{
    margin-top:25px;
    display:flex;
    gap:15px;
}

/* BUTTON 1 */
.btn-primary1{
    background:#ff7a00;
    color:#fff;
    padding:12px 25px;
    border-radius:30px;
    text-decoration:none;
    transition:.3s;
}

.btn-primary1:hover{
    background:#e86b00;
    transform:translateY(-3px);
}

/* BUTTON 2 */
.btn-primary2{
    background:#0b2c4d;
    color:#fff;
    padding:12px 25px;
    border-radius:30px;
    text-decoration:none;
    transition:.3s;
}

.btn-primary2:hover{
    background:#133a63;
}

/* IMAGE SLIDER */
.product-image-slider{
    position:relative;
    width:100%;
    height:420px;
    overflow:hidden;
    border-radius:18px;
    box-shadow:0 10px 30px rgba(0,0,0,0.12);
    background:#fff;
}

.slide-img{
    position:absolute;
    width:100%;
    height:100%;
    object-fit:cover;

    opacity:0;
    transform:scale(1.10);

    transition:opacity 1s ease, transform 6s ease;
}

/* ACTIVE IMAGE */
.slide-img.active{
    opacity:1;
    transform:scale(1);
}

/* =========================================
   SECTION TITLE
========================================= */

.section-heading{
    text-align:center;
    margin:10px 0 10px;
}

.section-heading h2{
    font-size:38px;
}

/* =========================================
   OVERVIEW
========================================= */

.product-section p{
    max-width:850px;
    margin:auto;
    text-align:center;
    font-size:16px;
    line-height:1.8;
    color:#555;
}

/* =========================================
   FEATURES
========================================= */

.feature-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:15px;
}

.feature-box{
    background:#fff;
    padding:30px;
    border-radius:16px;
    text-align:center;
    box-shadow:0 5px 20px rgba(0,0,0,0.08);
    transition:.3s;
}

.feature-box:hover{
    transform:translateY(-10px);
    box-shadow:0 15px 35px rgba(0,0,0,0.15);
}

.feature-box i{
    font-size:40px;
    color:#ff7a00;
    margin-bottom:10px;
}

/* =========================================
   APPLICATIONS
========================================= */

.product-list{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:15px;
    list-style:none;
    max-width:900px;
    margin:auto;
}

.product-list li{
    background:#fff;
    padding:14px 20px;
    border-radius:12px;
    box-shadow:0 5px 15px rgba(0,0,0,0.06);
    position:relative;
    padding-left:40px;
}

.product-list li::before{
    content:"✔";
    position:absolute;
    left:15px;
    color:#ff7a00;
}

/* =========================================
   TECH GRID
========================================= */

.tech-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:20px;
    max-width:900px;
    margin:auto;
}

.tech-box{
    background:#fff;
    padding:25px;
    border-radius:14px;
    box-shadow:0 5px 15px rgba(0,0,0,0.08);
    transition:.3s;
}

.tech-box1{
    background:#fff;
    color: #969696;
}


.tech-box:hover{
    transform:translateY(-6px);
}

/* =========================================
   CTA
========================================= */

.cta-section{
    background:#0b2c4d;
    color:#fff;
    text-align:center;
    padding:80px 0;
}

.cta-section h2{
    font-size:38px;
    margin-bottom:10px;
}

.cta-section p{
    color:#cbd5e1;
    margin-bottom:20px;
}

/* =========================================
   RESPONSIVE
========================================= */

@media(max-width:992px){

    .product-hero-grid{
        grid-template-columns:1fr;
        text-align:center;
    }

    .feature-grid,
    .product-list,
    .tech-grid{
        grid-template-columns:1fr;
    }
}