body {
    font-family: "Helvetica Neue", Arial, sans-serif;
    background-color: #f4f7f8;
    margin: 0;
    padding: 20px;
    color: #333;
}

#app {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

header h2 {
    color: #06C755;
    /* LINEカラー */
    margin-top: 0;
}

header p {
    font-size: 0.9rem;
    color: #666;
}

.field {
    margin-bottom: 20px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

input,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 1rem;
}

button {
    width: 100%;
    background-color: #06C755;
    color: white;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
}

button:active {
    background-color: #05a346;
}