body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0;
    padding: 0;
}

.header {
    width: 100%;
    background-color: #007bff;
    padding: 20px 0;
    text-align: center;
}

.main-title {
    color: white;
    font-size: 32px;
    margin: 0;
}

.content {
    max-width: 800px;
    width: 90%;
    padding: 20px;
    text-align: center;
}

.calculator {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    margin-bottom: 20px;
}

input {
    padding: 10px;
    width: calc(100% - 22px);
    margin-bottom: 10px;
    color: black;
}

button {
    padding: 10px 20px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 10px;
}

button:hover {
    background: #0056b3;
}

#vat-result, #total-result {
    margin-top: 20px;
    font-size: 18px;
    background-color: #e9ecef;
    padding: 10px;
    border-radius: 5px;
    color: #6c757d; /* 초기 텍스트 색상 */
}

#vat-result:empty::before, #total-result:empty::before {
    content: "결과대기";
    color: #6c757d;
}

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

.bold-blue-text {
    font-weight: bold;
    color: blue;
}

.bold-red-text {
    font-weight: bold;
    color: red;
}

.info-board {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.info-board p {
    margin: 5px 0;
    font-size: 14px;
}

.info-board a {
    color: #007bff;
    text-decoration: none;
    background: white;
    padding: 5px 10px;
    border-radius: 5px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
    transition: background 0.3s, box-shadow 0.3s;
}

.info-board a:hover {
    background: #e9ecef;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.footer {
    background-color: #007bff;
    color: white;
    padding: 10px;
    width: 100%;
    text-align: center;
    position: fixed;
    bottom: 0;
}

/* 애드센스 배너 스타일 */
.adsense-banner {
    margin: 20px 0;
    text-align: center;
}