body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f8f8f8;
}

.container {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    width: 850px;
    text-align: center;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.logo {
    height: 50px;
}

.contact {
    font-size: 14px;
    color: #777;
}

.upload-section {
    margin-bottom: 20px;
}

.upload-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

label {
    font-size: 14px;
    color: #333;
}

input[type="file"] {
    font-size: 14px;
    padding: 5px;
}

h1 {
    font-size: 24px;
    color: #c70017;
    margin-bottom: 10px;
}

p {
    font-size: 14px;
    color: #333;
    margin-bottom: 20px;
}

canvas {
    border: 1px solid #00f;
    background-color: #eef;
    cursor: crosshair;
}

#buttonContainer {
    margin-top: 10px;
}

button {
    font-size: 14px;
    padding: 10px 20px;
    margin: 5px;
    border: 1px solid #ddd;
    border-radius: 5px;
    cursor: pointer;
}

button#clearButton {
    background-color: #fff;
    color: #000;
}

button#saveButton {
    background-color: #c70017;
    color: #fff;
}

.input-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    margin-bottom: 10px; /* Thêm khoảng cách dưới */
}

input[type="text"] {
    width: calc(100% - 100px);
    font-size: 14px;
    padding: 5px;
}

.note {
    font-size: 12px;
    color: #c70017;
    margin-top: 10px;
}