body {
    font-family: "Open Sans", sans-serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
    font-variation-settings:"wdth" 100;
    background: #f0f4f8;
    margin: 0;
    padding: 0;
    
}

.container {
    max-width: 700px;
    margin: 50px auto;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #333;
}

form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
}

input[type="text"] {
    padding: 10px;
    font-size: 16px;
    flex: 1;
    border: 1px solid #ccc;
    border-radius: 6px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    background: #0066cc;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

button:hover {
    background: #004c99;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    padding: 12px;
    border-bottom: 1px solid #ddd;
    text-align: left;
}

tr:nth-child(even) {
    background-color: #f9f9f9;
}

.uppercase {
    text-transform: uppercase;
    font-weight: bold;
}

.form-container {
    position: relative;
    max-width: 700px;
    margin: 50px auto;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 30px;
    overflow: hidden;
}

.form-container::before {
    content: "";
    background-image: url('logo.png'); /* Đường dẫn đến logo */
    background-repeat: no-repeat;
    background-position: center;
    background-size: 70% auto; /* Chiều rộng 70%, chiều cao tự động */
    opacity: 0.08; /* Độ mờ nhẹ */
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.form-content {
    position: relative;
    z-index: 1;
}

@media (max-width: 600px) {
    form {
        flex-direction: column;
    }

    button {
        width: 100%;
    }
}