body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    margin: 0;
    padding: 40px 20px;
    background: #f7f7f7;
    color: #333;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
}

.box {
    max-width: 420px;
    margin: 0 auto;
    background: #fff;
    border-radius: 8px;
    padding: 25px 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.row {
    margin-bottom: 18px;
    display: flex;
    align-items: center;
}

label {
    width: 100px;
    font-weight: 600;
}

input[type="number"] {
    flex: 1;
    padding: 8px 10px;
    border: 1px solid #bbb;
    border-radius: 4px;
    font-size: 15px;
}

input[type="checkbox"] {
    margin-left: 8px;
    transform: scale(1.2);
}

button {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    border: none;
    border-radius: 4px;
    background: #007bff;
    color: #fff;
    cursor: pointer;
}

button:hover {
    background: #005dcf;
}

#result {
    margin-top: 25px;
    font-size: 17px;
    line-height: 1.6;
    word-break: break-all;
}

.tag {
    display: inline-block;
    background: #e7f1ff;
    color: #005dcf;
    padding: 4px 8px;
    border-radius: 4px;
    margin: 4px 4px 0 0;
}