body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-family: "Rounded Mplus 1c", "SF Pro JP", "Hiragino Sans", sans-serif;
    background-image: url("background.jpg");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
}

.card {
    background: rgba(255, 255, 255, 0.6);
    padding: 48px;
    border-radius: 32px;
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(5px);
}

h1 {
    text-align: center;
    color: #7c68b3;
    margin-bottom: 40px;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.content {
    line-height: 1.9;
    color: #5a5a5a;
}

p {
    margin: 28px 0;
    font-size: 15px;
    letter-spacing: 0.03em;
    font-weight: 500;
    text-align: left;
}

.closing {
    text-align: center;
    margin-top: 56px;
    color: #8a8a8a;
    font-size: 14px;
    font-weight: 500;
}

@media (max-width: 600px) {
    .card {
        padding: 20px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    p {
        font-size: 16px;
    }
}