body {
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 20px;
    margin-top: 100px;
    background-color: #f0f8fa;
    animation: fadeIn 1s ease;
}

@keyframes fadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #00afcc;
    font-size: 32px;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.1);
}

.button-container {
    text-align: center;
    margin-bottom: 30px;
}

button {
    padding: 10px 20px;
    margin: 5px;
    font-size: 15px;
    background: linear-gradient(135deg, #00afcc, #67d5e7);
    color: #fff;
    border: none;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,175,204,0.3);
    cursor: pointer;
    transition: 0.3s ease;
}

button:hover {
    background: linear-gradient(135deg, #00b8d4, #74e3f4);
    box-shadow: 0 6px 12px rgba(0,175,204,0.4);
}

.test-container, .answer-container {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
    padding: 0 25px;
    gap: 20px;
    animation: fadeIn 1s ease;
}

.column {
    width: 48%;
    background: #ffffff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.word-pair, .answer-pair {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 10px 0;
    border-bottom: 1px dashed #00afcc;
}

.word-pair span, .answer-pair span {
    flex: 1;
    font-size: 16px;
    color: #333;
}

.word-pair input {
    flex: 1;
    border: 1px solid #ccc;
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 16px;
    background-color: #f9f9f9;
    transition: border-color 0.3s;
}

.word-pair input:focus {
    border-color: #00afcc;
    outline: none;
    box-shadow: 0 0 5px #00afcc80;
}

input[type="number"], select {
    padding: 6px 10px;
    margin: 0 10px;
    font-size: 14px;
    border: 1px solid #bbb;
    border-radius: 6px;
}

#outputDisplay, textarea {
    width: 90%;
    max-width: 800px;
    margin: 30px auto;
    height: 300px;
    overflow: auto;
    border: 1px solid #ccc;
    padding: 15px;
    box-sizing: border-box;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

#fileName {
    margin-top: 20px;
    font-size: 16px;
    color: #666;
    text-align: center;
}

/* 切り替え時にもアニメーション */
.fade {
    animation: fadeIn 0.8s ease;
}

 /* メニューバーのスタイル */
 .navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgb(23, 104, 170);
    color: #fff;
    padding: 10px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    z-index: 1000;
}

.navbar .menu-btn {
    font-size: 24px;
    cursor: pointer;
    background: none;
    border: none;
    color: #fff;
}

.navbar .menu {
    display: none; /* メニューを非表示にする */
    position: absolute;
    top: 40px;
    left: 0;
    background-color: rgb(23, 104, 170);
    border: 1px solid rgb(23, 104, 170);
    padding: 10px;
    width: 500px;
    box-shadow: 0 2px 5px rgb(23, 104, 170)(187, 100%, 50%, 0.692);
}

.navbar .menu.show {
    display: block; /* メニューを表示 */
}

.navbar .menu a {
    color: #fff;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    text-align: left;
}

.navbar .menu a:hover {
    text-decoration: underline;
}