*{
margin:0;
padding:0;
box-sizing:border-box;
}

html{
scroll-behavior:smooth;
}

body{
font-family:sans-serif;
background:#fff;
color:#111;
overflow-x:hidden;
}

header{
position:fixed;
top:0;
left:0;
width:100%;
height:80px;
padding-right:5%;
padding-left:0px;
display:flex;
justify-content:space-between;
align-items:center;
background:rgba(255,255,255,.95);
backdrop-filter:blur(10px);
z-index:999;
}

.logo img{
    height:clamp(80px, 8vw, 100px);
    width:auto;
    display:block;
}

nav{
display:flex;
gap:30px;
}

nav a{
text-decoration:none;
color:#111;
font-weight:700;
}

/* main */
h1{
    margin-top:100px;
    text-align:center;
    font-size:2.5rem;
    background:#008d81;
    color:#fff;
}

.section-text{
    text-align:center;
    margin-bottom:40px;
    line-height:1.8;
    margin-top:30px;
}

.content-card{
    background:#fff;
    border-radius:20px;
    padding:30px;
    margin-bottom:40px;
    box-shadow:0 5px 20px rgba(0,0,0,.08);
}

.content-card h2{
    margin-bottom:20px;
}

.playlist-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(350px,1fr));
    gap:20px;
}

.playlist-grid iframe{
    width:100%;
    height:400px;
    border:none;
    border-radius:15px;
}

.shorts-btn{
    display:inline-block;
    margin-top:15px;
    padding:12px 24px;
    border-radius:999px;
    background:#ff0033;
    color:#fff;
    text-decoration:none;
    font-weight:bold;
}

@media(max-width:768px){

    .playlist-grid{
        grid-template-columns:1fr;
    }

    .playlist-grid iframe{
        height:350px;
    }

}

.footer{
background:#000000;
color:white;
text-align:center;
padding:5px 5px;
margin-top:30px;
}

.footer img{
    margin-bottom:-30px;
}

.footer p{
    margin-bottom:30px;
}
/* animation */

.fade{
opacity:0;
transform:translateY(50px);
transition:1s;
}

.fade.show{
opacity:1;
transform:none;
}

/* hamburger */

.hamburger{
display:none;
flex-direction:column;
gap:5px;
cursor:pointer;
}

.hamburger span{
width:28px;
height:3px;
background:#111;
}

@media(max-width:768px) {
    .hamburger{
        display:flex;
    }

    nav{
        display:none;
    }

    nav.active{
        display:flex;
    }
}

#hamburger{
display:flex;
}

nav{
position:fixed;
top:80px;
right:-100%;
width:280px;
height:calc(100vh - 80px);
background:white;
flex-direction:column;
padding:40px;
transition:.4s;
}

nav.active{
right:0;
}

.info-card{
    border:1px solid #707070;
    border-radius:20px;
    padding:30px;
    background:#fff;
    margin-top:30px;
    border-left:5px solid #ff7b00;
}

.info-card2{
    border:1px solid #707070;
    border-radius:20px;
    padding:30px;
    background:#fff;
    margin-top:30px;
    border-left:5px solid #00830b;
}


.info-card h3{
    margin-bottom:15px;
    font-size:1.5rem;
    text-decoration:underline;
}

.info-card2 h3{
    margin-bottom:15px;
    font-size:1.5rem;
    text-decoration:underline;
}


.tag{
    margin-bottom:8px;
    font-size:0.95rem;
}

.text{
    margin-bottom:25px;
}

.buttons{
    display:flex;
    gap:15px;
    flex-wrap:wrap;
    margin-top:8px;
}

.btn.dark{
    display:inline-block;
    background:#2f3743;
    color:#fff;
    text-decoration:none;
    padding:12px 24px;
    border-radius:999px;
    font-weight:700;
}

/* スマホ */

@media (max-width:768px){

    #zikoN{
        width:90%;
    }

    .s img{
        width:70%;
    }

    .playlist-grid{
        grid-template-columns:1fr;
    }

    .content-card{
        padding:20px;
    }

    .footer img{
        width:250px;
    }

    h1,h2{
        text-align:center;
    }
}