:root {
    --celeste: #00aaff;
    --blanco: #ffffff;
    --negro: #333333;
    --gris-claro: #f4f9ff;
}


*{ margin: 0;
    padding: 0;
    box-sizing: border-box;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
html, body {
    width: 100%;
    overflow-x: hidden;
    background-color: #f4f9ff;
}
body {
    max-width: 1240px;
    width: 100%;
    margin: 0 auto;
}
body {
    display: block; 
}
.product-page-container {
    max-width: 1080px;
    margin: 40px auto;
    padding: 0 20px;
}

.product-essential {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    background: var(--blanco);
    padding: 30px;
    border-radius: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}


.main-image-viewer {
    width: 100%;
    height: 500px;
    background: var(--gris-claro);
    border-radius: 30px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.main-image-viewer img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: 0.4s ease;
}

.thumbnail-list {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    justify-content: center;
}

.thumb {
    width: 70px;
    height: 70px;
    border-radius: 15px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: 0.3s;
}

.thumb.active { border-color: var(--celeste); transform: scale(1.05); }


.breadcrumb { font-size: 0.8rem; color: #888; margin-bottom: 10px; }
.category-tag { color: var(--celeste); font-weight: 700; font-size: 0.9rem; }
.product-purchase-panel h1 { font-size: 2.2rem; margin: 10px 0; line-height: 1.2; padding: 0.5rem;}
.product-purchase-panel{
        padding: 0.5rem ;
}

.price-section {
    background: var(--gris-claro);
    padding: 20px;
    border-radius: 20px;
    margin: 20px 0;
}

.main-price { font-size: 2.5rem; font-weight: 800; color: var(--celeste); }
.wholesale-price { color: #2ecc71; font-weight: 600; }

.purchase-box {
    display: flex;
    align-items: center; 
    gap: 15px;
    margin: 30px 0;
}

.quantity-selector {
 display: flex;
    align-items: center;
    background: #fff;
    border: 2px solid #f0f0f0;
    border-radius: 20px; 
    padding: 5px;
    height: 60px; 
}

.quantity-selector button {
   width: 40px;
    height: 100%;
    border: none;
    background: none;
    font-size: 1.5rem;
    color: #333;
    cursor: pointer;
    transition: 0.2s;
}
.quantity-selector button:hover {
    color: var(--celeste);
}

.quantity-selector input {
    width: 40px;
    text-align: center;
    border: none;
    outline: none;
    font-size: 1.2rem;
    font-weight: bold;
    background: transparent;
}

.btn-buy-now {
flex: 1; 
    background: #25d366;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    height: 60px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: 0.3s;
    overflow: hidden; 
}
.btn-buy-now img {
    width: 30px; 
    height: auto;
}
.btn-buy-now:hover {
    background: #20ba5a;
    transform: translateY(-2px);
}


input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.btn-buy-now:hover { transform: scale(1.02); box-shadow: 0 10px 20px rgba(37, 211, 102, 0.3); }


.product-details-tabs { margin-top: 60px; }
.tabs-header { border-bottom: 2px solid #eee; margin-bottom: 30px; }
.tab-link {
    background: none;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: bold;
    border-bottom: 4px solid var(--celeste);
    color: var(--celeste);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.spec-card {
    background: var(--blanco);
    padding: 20px;
    border-radius: 20px;
    border: 1px solid #eee;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.spec-card:hover {
 

    box-shadow: 0 12px 25px rgba(0, 174, 239, 0.25);
    border-color: var(--celeste);
    cursor: pointer;
}
.full-description h3 {
    color: var(--celeste);
}
.trust-icons{
    display: flex;
}
.trust-item{
    
        padding: 5px;
    margin: 5px;
}

@media (max-width: 850px) {
    .product-essential { grid-template-columns: 1fr; 
                justify-content: center;
            padding: 5px;
                padding-bottom: 10px;
            }
    .main-image-viewer { height: 350px; }
    .purchase-box {
        padding: 1rem;
     }
    .product-page-container{
        padding: 0;
    }
    .btn-buy-now{
        max-width: 190px;
    padding: 0.5rem;
    }
    .product-details-tabs{
        justify-content: center;
                padding: 0.5rem;
                margin-top: 30px;

    }
    .related-section{
        justify-content: center;
    }
    .product-purchase-panel h1{
        font-size: 1.5rem;
    }
    .main-price{
        font-size: 1.8rem;
    }
    .short-description{
        font-size: 1rem;
    }
    .short-description{
        padding: 0.5rem;
    }
}

@media (max-width: 768px) {
    .spec-card:hover {
        
        transform: translateY(-3px) scale(1.01);
    }
}

.quantity-selector input {
    width: 65px; 
    font-size: 1.1rem;
    border: none;
    text-align: center;
    background: transparent;
}


@media (max-width: 400px) {
    .quantity-selector {
        padding: 5px 10px;
        min-width: 120px;
    }
}