html,body {
    font-family: 'Tahoma', Arial, sans-serif;
    height: 100%;
    width: 100%; /* Changed from 1400px to 100% for responsiveness */
    padding: 0;
    display: flex;
    flex-direction: column;
    font-family: 'Arial', sans-serif;
    background-color: #f7f8fc;
    color: #333;
    line-height: 1.4;
    align-items: center;
    overflow-x: hidden;
    box-sizing: border-box; min-height: 10vh;
}
html {
    font-size: 16px; /* Base font size for PCs */
}
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
}

header {
    width: 100%;margin-top: 10px;
    background-color: #006370;
    color: #fff;
    padding: 10px 0;
    border-radius: 10px;
    align-items: center;
    text-align: center;
    box-sizing: border-box;
}
header h1 {
    margin: 0;
    font-size: 1.5rem; /* 24px on PCs */
}
.btn-back {
    background-color: #fff;
    padding: 6px 10px;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn-back a {
    text-decoration: none;
}

.btn-back a:hover {
    color: #e07d19;
    text-decoration: underline;
}

#product-select {
    width: 100%;
    padding: 10px;
    font-size: 1.2rem;font-weight:bold;font-family:'Courier New', Courier, monospace;
    border: 2px solid #e07d19;
    border-radius: 5px;
    margin-bottom: 5px;color:#006370;
    background-color: #f7f8fc;
    cursor: pointer;
    align-items: center;
    box-sizing: border-box;
}

#product-select:focus {
    outline: none;
    border-color: #e07d19;
}

.product-details {
    margin-top: 6px;
    width: 100%;
    box-sizing: border-box;
}

.product-info {
    display: flex;
    flex-direction: column; /* description above, then images below */
    gap: 5px;
    align-items: flex-start;
    width: 100%;
    box-sizing: border-box;
}

.product-description {
    width: 100%; /* full width for text*/
    font-weight: bold;
}

.product-description h2 {
    color: #006370;
    margin-bottom: 10px;
    font-size: 1.25rem; /* 20px on PCs */
}
.product-description p {
    margin-bottom: 11px;
    font-size: 1rem; /* 17.6px on PCs */
    font-weight: bold;
    font-family: Arial, Helvetica, sans-serif;
}
.product-description ul {
    padding-right: 10px;
    list-style-type: disc;
}
.product-description ul li {
    margin-bottom: 3px;
    font-size: 1rem; /* 16px on PCs */
}

.swiper-container {
    width: 100%;
    height: 400px; /* Fixed height for the slider container */
    margin-top: 10px;
    position: relative;
    overflow: hidden; /* Ensure no overflow */
}

.swiper-slide {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f9f9f9;
    padding: 7px; /* Add padding for better spacing */
    box-sizing: border-box; /* Ensure padding is included in the width/height */
}

.swiper-slide img {
    max-width: 100%; 
    max-height: 100%; 
    width: auto;
    object-fit: contain; /* Fit the image within the slide */
    border-radius: 10px;
}

.swiper-button-next,
.swiper-button-prev {
    color: #e07d19;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 8px;
    border-radius: 50%;
    width: 30px; /*  larger for better touch targets */
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10; /*  buttons are above the slides */
}

.swiper-button-next::after,
.swiper-button-prev::after {
    font-size: 24px;
    font-weight: bold;
}
/* Media Queries for Tablets */
@media (max-width: 768px) {
    html {
        font-size: 14px; /* Base font size for tablets 14px */
    }

    header h1 {
        font-size: 1.3rem; 
    }

    .product-description h2 {
        font-size: 1.3rem;
    }

    .product-description p {
        font-size: 1rem; 
    }
}

/* Media Queries for Mobile Devices */
@media (max-width: 480px) {
    html {
        font-size: 12px; /* Base font size for mobile devices */
    }

    header h1 {
        font-size: 1rem; 
    }

    .product-description h2 {
        font-size: 1.1rem; /* 14.4px on mobile devices */
    }

    .product-description p {
        font-size: 1rem; 
    }

    .features-list li {
        font-size: 0.7rem; 
    }
}
/* Media Queries for Responsiveness */
@media (max-width: 768px) {
    .swiper-container {
        height: 300px; 
    }

    .swiper-slide {
        padding: 5px; 
    }

    .swiper-button-next,
    .swiper-button-prev {
        width: 30px; /* Smaller buttons */
        height: 30px;
        padding: 8px;
    }

    .swiper-button-next::after,
    .swiper-button-prev::after {
        font-size: 18px; /* Smaller icons */
    }
}

@media (max-width: 480px) {
    .swiper-container {
        height: 200px; 
    }

    .swiper-slide {
        padding: 3px;
    }

    .swiper-button-next,
    .swiper-button-prev {
        width: 25px; /*  smaller buttons */
        height: 25px;
        padding: 6px;
    }

    .swiper-button-next::after,
    .swiper-button-prev::after {
        font-size: 16px; /* Smaller icons for very small screens */
    }
}

footer {
    width: 100%;
    background-color: #006370;
    color: #fff;
    align-items: center;
    text-align: center;
    padding: 6px 0;
    border-radius: 5px;
    margin-top: auto;
    box-sizing: border-box;
}

footer p {
    margin: 0;
}
/*-------features-list styling------- */

.features-list {
    display: flex;
    flex-wrap: wrap; /* allow items move to new row*/
    gap: 1rem; 
    margin-top: 0.5rem;
    padding: 0;
    list-style-type: none; 
}
.features-list li {
    font-size: 0.9rem;
    color: #000;
    white-space: nowrap; 
    padding: 0.5rem 1rem; 
    background-color: #ebecf2;
    border-radius: 5px;
    list-style-type: none;
    flex: 1 1 auto; /*Allowing elements to shrink and grow as space allows*/
    text-align: center; 
}
@media (max-width: 767px) {
.features-list {
        gap: 0.75rem; 
        margin-top: 0.4rem;
    }
.features-list li {
        font-size: 0.8rem; 
        padding: 0.4rem 0.8rem; 
        flex: 1 1 45%; /*items to take 45% from width */
        white-space: normal; 
        word-wrap: break-word; 
        text-align: right; 
    }
}
@media (max-width: 480px) {
.features-list {
        gap: 0.5rem; 
        margin-top: 0.3rem;
    }
.features-list li {
        font-size: 0.7rem; 
        padding: 0.3rem 0.6rem; 
        flex: 1 1 100%; /* one item take full width  */
        white-space: normal; /* allow move to new row */
        word-wrap: break-word; /*Allow Long Text to Wrap to a New Line */
        text-align: right;
    }
}

.navbar{
    display:flex;
    align-items: center;
    justify-content: center;
    height:80px;width:100%;
    position:sticky; top:0;
    background-color: #006370;border-radius: 5px;
    box-shadow: 0 10px 20px rgb(0,0,0,0.5);
    backdrop-filter:blur(10px);
    z-index: 999; /* top on other elements */
}
.navbar-container{
    display: flex;
    align-items: center;
    justify-content: space-between;
    width:100%;
    padding: 0 2rem;
    max-width: 1600px;
}
.navbar-logo{
    font-size: 2rem;
    font-weight: 500;color: #fff;
    text-decoration: none;cursor: pointer;
}
.navbar-container .navbar-menu{
    display: none;
    display: flex;text-align: center;
    gap:1.5rem;list-style: none; 
}
.navbar-container .navbar-menu li a{
    text-decoration: none;color: #fff;font-size: 1.3rem;font-weight: 500;
padding: 3px 20px; border-radius: 20px; border: 2px solid transparent;
transition: all 0.7s ease;
white-space: nowrap;
}
.navbar-container .navbar-menu li a:hover,
.navbar-container .navbar-menu li a.active{
    color:#006370; background:#e07d19;
    border:2px solid #e07d19;
}

.navbar-container .navbar-menu.active{display: flex;}

.navbar-toggle{
    display: none;
    background: transparent;padding:10px;
    border:none;cursor: pointer;
}
.bar{
    display: block;
    width: 25px;height: 3px;margin:5px auto;background: #fff;
    transition:all 0.3s ease-in-out;
}
@media(max-width:880px){
    .navbar{ backdrop-filter: none; }
    .navbar-container .navbar-menu{
        display: none;
     flex-direction: column; align-items: flex-start;
     gap:1.7rem !important; position: absolute;
     height: 100vh;width: 250px; top:0; right: 0;
    padding: 5rem 1.5rem; box-shadow: 0 10px 10px rgb(0,0,0,0.5);
    backdrop-filter: blur(10px);
  }
.navbar-toggle{display: block; z-index: 999;}
.navbar-toggle.active .bar:nth-child(2){opacity: 0;}
.navbar-toggle.active .bar:nth-child(1) {
         transform: translateY(8px) rotate(45deg); 
    }
.navbar-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg); 
   }
}
@media (max-width:480px){
    .navbar-container{padding: 0 1rem;}
    .navbar-logo{font-size: 1.7rem;}
    .navbar-container .navbar-menu li a{
     font-size: 1.2rem; padding: 3px 15px}
}