* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    color: #000;
    background: #fff;
}

header {
    padding: 20px;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

main {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 20px;
}

.question {
    margin-top: 30px;
}

.question h2 {
    margin-bottom: 15px;
}

.question-image {
    display: block;
    width: 100%;
    height: auto;
}

/* PCなど、画面幅が1024px以上の場合 */
@media (min-width: 1024px) {
    .question-image {
        max-width: 800px;
        margin: 0 auto;
    }
}

.image-placeholder {
    width: 100%;
    max-width: 1280px;
    aspect-ratio: 16 / 9;
    border: 1px solid #000;

    display: flex;
    align-items: center;
    justify-content: center;
}

.answer-area {
    margin-top: 30px;
    text-align: center;
}

.answer-area input {
    width: min(300px, 70%);
    padding: 8px;
    font-size: 16px;
}

.answer-area button {
    padding: 8px 16px;
    font-size: 16px;
    cursor: pointer;
}

#message {
    margin-top: 10px;
}

.link-button-area {
    text-align: center;
    margin-top: 30px;
}

.link-button {
    display: inline-block;
    padding: 10px 20px;
    border: 1px solid #000;
    color: #000;
    text-decoration: none;
}