@import url('https://fonts.googleapis.com/css2?family=Zen+Kurenaido&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
}

body {
    background-color: #4DA8DA;
}


/*--------------------------------------
background
--------------------------------------*/
.p5-container {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 0;
}


/*--------------------------------------
main
--------------------------------------*/
main {
    min-height: 100vh;
    margin-top: 100px;
}

section {
    position: relative;
    width: 100%;
    margin-bottom: 50px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 50px 0;
}

.section-title {
    font-size: 4rem;
    font-weight: 700;
    font-family: 'Zen Kurenaido';
    color: #FFFFFF;
    text-align: center;
}

.section-title span {
    font-size: 6rem;
}

.container h3 {
    margin-bottom: 30px;
    text-align: center;
    font-size: 3rem;
    font-family: 'Zen Kurenaido';
    color: #FFFFFF;
}

.container p {
    margin: 10px 0;
    text-align: center;
    font-size: 2rem;
    font-family: 'Zen Kurenaido';
    color: #FFFFFF;
}

.wrap {
    margin: auto;
    padding: 30px;
    background: #FFFFFF20;
    backdrop-filter: blur(5px);
    border-radius: 25px;
    box-shadow: 0 12px 40px #ffb8c233;
    border: 1px solid #ffffff4d;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.asset-card {
    background: #ffffff50;
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    transition: box-shadow 0.3s ease;
    border: 1px solid #ffffff33;
}

.asset-card:hover {
    box-shadow: 0 20px 40px #00000030;
}

.asset-card h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #000000;
}

.asset-card p {
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-family: none;
    color: #333333;
}

.asset-card img,
.asset-card video {
    width: 100%;
    margin-bottom: 20px;
    border: solid 5px #4DA8DA;
}

.download-btn {
    background: linear-gradient(45deg, #4DA8DA, #22709b);
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.download-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px #00000050;
}


/*--------------------------------------
スマートフォン向けスタイル
--------------------------------------*/
@media (max-width: 768px) {
    main {
        margin-top: 30px;
    }

    .container {
        padding: 20px 0;
    }

    .container h3 {
        margin-bottom: 20px;
        font-size: 2rem;
    }

    .container p {
        margin: 20px;
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .section-title span {
        font-size: 3rem;
    }

    .wrap {
        margin: 50px 20px 0;
        padding: 20px;
    }

    .grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .asset-card h3 {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }

    .asset-card p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }
}