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

body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f172a, #1e293b);
    color: #1f2937;
    padding: 40px 20px;
}

/* Header */
#pageHeader {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    color: #fff;
    padding: 25px;
    border-radius: 16px;
    margin-bottom: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

#pageHeader h1 {
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* Navigation */
.ul-class {
    list-style: none;
    margin-top: 15px;
}

.ul-class li {
    display: inline-block;
    margin: 0 10px;
}

.ul-class li a {
    text-decoration: none;
    color: #38bdf8;
    font-weight: 500;
    transition: 0.3s ease;
}

.ul-class li a:hover {
    color: #ffffff;
}

/* Calculator Card */
#calculatorSection {
    background: #ffffff;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    position: relative;
}

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: #0ea5e9;
    color: #fff;
    padding: 14px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 14px;
}

td {
    padding: 18px 12px;
    border-bottom: 1px solid #e5e7eb;
    vertical-align: middle;
}

tr:hover {
    background-color: #f9fafb;
    transition: 0.3s;
}

/* Product Image */
.product-image {
    width: 80px;
    border-radius: 12px;
}

/* Dropdown */
.dropdown {
    width: 100%;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #d1d5db;
    background: #f8fafc;
    font-size: 14px;
    transition: 0.3s;
}

.dropdown:focus {
    border-color: #0ea5e9;
    outline: none;
    box-shadow: 0 0 0 3px rgba(14,165,233,0.2);
}

/* Quantity Controls */
.quantity {
    display: flex;
    align-items: center;
    justify-content: center;
}

.quantity button {
    background: #0ea5e9;
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.2s;
}

.quantity button:hover {
    background: #0284c7;
    transform: scale(1.05);
}

.quantity input {
    width: 50px;
    margin: 0 10px;
    text-align: center;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    padding: 6px;
    font-weight: 600;
}

/* Total Card */
.total {
    margin-top: 30px;
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    color: #fff;
    padding: 20px;
    border-radius: 16px;
    text-align: center;
    font-size: 20px;
    font-weight: 600;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

/* Responsive */
@media (max-width: 900px) {
    table {
        display: block;
        overflow-x: auto;
    }

    th, td {
        font-size: 14px;
    }

    .product-image {
        width: 60px;
    }
}