body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(to bottom, #f0f8ff, #dff9fb);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    text-align: center;
    background-color: white;
    padding: 2em;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    max-width: 500px;
}

.kogane-image {
    width: 100%;
    border-radius: 10px;
    margin-top: 1em;
    margin-bottom: 1em;
}

.btn {
    display: inline-block;
    padding: 0.5em 1.5em;
    background-color: #ffafcc;
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #ff8fa3;
}