*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

.navbar{
    background:white;
    height:90px;

    display:flex;
    justify-content:space-between;
    align-items:center;

    padding:0 60px;
}

.logo img{
    height:90px;
}

.nav-links{
    display:flex;
    list-style:none;
    gap:45px;
}

.nav-links a{
    text-decoration:none;
    color:black;
    font-size:18px;
    font-weight:bold;
    font-family:Arial, sans-serif;
}

.nav-links a.active{
    color:black;
}

.nav-links a:hover{
    color:black;
}

.dropdown{
    position: relative;
}

.dropdown-content{
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 280px;
    list-style: none;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    overflow: hidden;
    z-index: 1000;
}

.dropdown-content li a{
    display: block;
    padding: 15px 22px;
    text-decoration: none;
    color: #002053;
    font-size: 17px;
    font-family: "Trebuchet MS", Arial, sans-serif;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.dropdown-content li a:hover{
    background: #002053;
    color: white;
    padding-left: 30px;
}

.dropdown:hover .dropdown-content{
    display: block;
}

.pvc-bg{
    background: rgb(219, 230, 243);
    padding:50px 0;
    margin-top:20px;
}

.pvc-hero{
    width:90%;
    margin:60px auto;
    display:flex;
    align-items:center;
    background:white;
    border-radius:20px;
    overflow:hidden;
    box-shadow:0 5px 20px rgba(0,0,0,0.15);
}

.pvc-left{
    flex:1;
    padding:40px;
}

.pvc-right{
    flex:1;
}

.hero-logo{
    width:300px;
    display:block;
    margin:0 auto 30px auto;
}

.pvc-left h1{
    text-align:center;
    color: navy;
    padding-bottom: 10px;
}

.pvc-left p{
    text-align:justify;
}

.pvc-left p{
    font-size:18px;
    line-height:1.8;
    text-align:justify;
    color:#444;
}

.pvc-right img{
    width:98%;
    height:450px;
    object-fit:cover;
    display:block;
    padding-bottom: 10px;
    padding-top: 10px;
    border-radius: 40px;
}

.applications-section{
    width:90%;
    margin:70px auto;
}

.applications-section h2{
    text-align:center;
    color:#002053;
    font-size:34px;
    margin-bottom:40px;
    letter-spacing:1px;
}

.application-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:30px;
}

.application-card{
    background:#fff;
    border-radius:18px;
    padding:18px;
    text-align:center;
    box-shadow:0 5px 18px rgba(0,0,0,.12);
    transition:.3s;
}

.application-card:hover{
    transform:translateY(-8px);
}

.application-card img{
    width:100%;
    height:170px;
    object-fit:cover;
    border-radius:12px;
    cursor:pointer;
}

.application-card p{
    margin-top:15px;
    font-size:18px;
    font-weight:bold;
    color:#002053;
}

.features-section{
    width:90%;
    margin:80px auto;
}

.features-section h2{
    text-align:center;
    color:#002053;
    font-size:34px;
    margin-bottom:35px;
}

.features-box{
    background:#fff;
    border-radius:22px;
    padding:45px;
    display:flex;
    justify-content:space-between;
    gap:80px;
    box-shadow:0 8px 25px rgba(0,0,0,.12);
}

.feature-column{
    flex:1;
}

.feature-column ul{
    padding-left:25px;
}

.feature-column li{
    font-size:19px;
    line-height:2;
    color:#444;
}

.products-section{
    width:90%;
    margin:80px auto;
}

.products-section h2{
    text-align:center;
    color:#002053;
    font-size:34px;
    margin-bottom:40px;
}

.products-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:30px;
}

.product-card{
    background:#fff;
    border-radius:18px;
    padding:18px;
    text-align:center;
    box-shadow:0 5px 18px rgba(0,0,0,.12);
    transition:.3s;
}

.product-card:hover{
    transform:translateY(-8px);
}

.product-card img{
    width:100%;
    height:190px;
    object-fit:cover;
    border-radius:12px;
    cursor:pointer;
}

.product-card p{
    margin-top:15px;
    font-size:18px;
    font-weight:bold;
    color:#002053;
}

.button-section{
    width:90%;
    margin:70px auto;
    display:flex;
    justify-content:space-between;
    align-items:center;
}

.catalogue-btn,
.next-btn{
    display:inline-block;
    padding:16px 35px;
    border-radius:40px;
    text-decoration:none;
    color:white;
    font-size:18px;
    font-weight:bold;
    transition:.3s;
}

.catalogue-btn{
    background:#002053;
}

.catalogue-btn:hover{
    background:#0b3f8a;
}

.next-btn{
    background:#8B0000;
}

.next-btn:hover{
    background:#b22222;
}

.modal{
    display:none;
    position:fixed;
    left:0;
    top:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,.92);
    justify-content:center;
    align-items:center;
    flex-direction:column;
    z-index:9999;
}

.modal-image{
    max-width:80%;
    max-height:80vh;
    border-radius:15px;
    object-fit:contain;
}

.close{
    position:absolute;
    top:25px;
    right:40px;
    font-size:50px;
    color:white;
    cursor:pointer;
}

.prev,
.next{
    position:absolute;
    top:50%;
    transform:translateY(-50%);
    background:none;
    border:none;
    color:white;
    font-size:65px;
    cursor:pointer;
    transition:.3s;
}

.prev:hover,
.next:hover{
    color:#cccccc;
}

.prev{
    left:40px;
}

.next{
    right:40px;
}

.download-popup{
    margin-top:30px;
    padding:14px 35px;
    background:#002053;
    color:white;
    text-decoration:none;
    border-radius:35px;
    font-size:18px;
    font-weight:bold;
}

.download-popup:hover{
    background:#0b3f8a;
}

@media(max-width:1100px){

    .pvc-hero{
        flex-direction:column;
        text-align:center;
    }

    .pvc-left,
    .pvc-right{
        width:100%;
    }

    .pvc-left{
        margin-bottom:35px;
    }

    .application-grid{
        grid-template-columns:repeat(2,1fr);
    }

    .products-grid{
        grid-template-columns:repeat(2,1fr);
    }

    .features-box{
        flex-direction:column;
        gap:30px;
    }

    .button-section{
        flex-direction:column;
        gap:20px;
    }

}

@media(max-width:700px){

    .navbar{
        flex-direction:column;
        height:auto;
        padding:20px;
    }

    .nav-links{
        flex-wrap:wrap;
        justify-content:center;
        gap:20px;
    }

    .application-grid{
        grid-template-columns:1fr;
    }

    .products-grid{
        grid-template-columns:1fr;
    }

    .pvc-right img{
        height:250px;
    }

    .modal-image{
        max-width:95%;
    }

    .prev,
    .next{
        font-size:45px;
    }

    .button-section{
        width:95%;
    }

}