html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    overflow: hidden;
    color: #000000;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 15%;
    background-color: rgba(175, 252, 255, 0.5);
    z-index: 1;
}

.content {
    position: relative;
    z-index: 0;
    display: flex;
    justify-content: center;
    height: calc(100vh - 15%);
    padding: 20px;
    overflow: auto; /* スクロールを可能にする */
}

.content a {
    position: relative;
    z-index: 2;
    color: rgb(255, 63, 63);
}

.center {
    text-align: center;
}

h1 {
    font-size: 30px;
    color: #000000
}

.button-container {
    overflow: auto;
    max-height: 80vh;
}

.button {
    display: inline-block;
    padding: 20px 40px;
    font-size: 18px;
    font-family: Arial, sans-serif;
    color: #fff;
    background: linear-gradient(145deg, #4e54c8, #8f94fb);
    border: none;
    border-radius: 50px;
    box-shadow: 10px 10px 20px #aaa, -10px -10px 20px #fff;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.button:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300%;
    height: 300%;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    z-index: 0;
    transition: all 0.5s ease;
}

.button:hover:before {
    width: 350%;
    height: 350%;
    transition: all 0.5s ease;
}

.button span {
    position: relative;
    z-index: 1;
}

/* アニメーションの追加スタイル */
.animation {
    opacity: 0;
    transform: translateY(100px);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

.animation.show {
    opacity: 1;
    transform: translateY(0);
}
p{
    color: white;
}