body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
}

.container {
    width: 90%;
    max-width: 1000px;   /* ← 幅 */
    margin: 40px auto;   /* 100px → 40px */
    background: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h2 {
    text-align: center;
}

label {
    display: block;
    margin-top: 15px;
    font-weight: bold;
}

select {
    width: 100%;
}

button {
    padding: 8px;
    margin-top: 5px;
    font-size: 14px;
}


button:hover {
    background-color: #0056b3;
}

.nav-area{
    display:flex;
    justify-content:space-between;
    margin-top:20px;
}
    .nav-area button {
        width: 100%;
    }

.btn-back {
    width: 120px;
}
.back-area {
    margin-bottom: 10px;
}

input[type="text"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    font-size: 14px;
    box-sizing: border-box;
}

textarea {
    min-height: 180px;   /* ← 解説・設問を広く */
    resize: vertical;
}


textarea[name="description"] {
    min-height: 250px;
}

textarea[name="commentary"] {
    min-height: 200px;
}

input[type="number"].short-input {
    width: 80px;
}