body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    background: #f7f8fa;
    color: #222;
}

header {
    background: #2563eb;
    color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1100px;
    margin: 0 auto;
    padding: 12px 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    text-decoration: none;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
}

header nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 24px;
    font-size: 1rem;
    font-weight: 500;
    transition: opacity 0.15s;
}

header nav a:hover {
    opacity: 0.75;
}

form {
    margin: 40px auto 0 auto;
    background: #fff;
    padding: 20px 24px;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    max-width: 1800px;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

form input, form select, form button {
    padding: 9px 12px;
    border-radius: 8px;
    border: 1px solid #d5d6da;
    font-size: 1rem;
    margin-bottom: 0;
}

form button {
    background: #2563eb;
    color: #fff;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}

form button:hover {
    background: #1e40af;
}

h1, h2, h3 {
    font-weight: 700;
    letter-spacing: -1px;
}

h1 {
    margin-top: 32px;
    margin-bottom: 18px;
    text-align: center;
    color: #2563eb;
    font-size: 2.1rem;
}

h2 {
    margin: 20px 0 14px 0;
    font-size: 1.4rem;
}

a {
    color: #2563eb;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1900px;
    margin: 0 auto;
    padding: 0 20px;
}

.product-card {
    border: 1px solid #e2e4e8;
    border-radius: 16px;
    background: #fff;
    padding: 16px;
    box-shadow: 0 1px 5px rgba(0,0,0,0.03);
    width: 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 20px;
    transition: box-shadow 0.15s;
}

.product-card:hover {
    box-shadow: 0 6px 24px rgba(37,99,235,0.10);
}

.product-card img {
    max-width: 100%;
    height: 160px;
    object-fit: contain;
    margin-bottom: 12px;
    border-radius: 8px;
    background: #f1f2f4;
}

table {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 1px 7px rgba(0,0,0,0.04);
    border-collapse: separate;
    border-spacing: 0;
    margin: 18px 0;
    width: 100%;
}

th, td {
    padding: 10px 14px;
    border-bottom: 1px solid #f0f1f4;
    text-align: left;
}

th {
    background: #eaf1ff;
    font-weight: 600;
    color: #234290;
}

tr:last-child td {
    border-bottom: none;
}

@media (max-width: 700px) {
    header .container, form {
        flex-direction: column;
        align-items: flex-start;
    }
    .product-card {
        width: 100%;
    }
}