:root{
    --primary:#006699;
    --secondary:#0f172a;
    --light:#f8fafc;
    --border:#e2e8f0;
    --radius:18px;
}

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

body{
    font-family:system-ui,sans-serif;
    line-height:1.7;
    color:#1e293b;
    background:#f1f5f9;
}

.container{
    width:min(1100px,90%);
    margin:auto;
}

header{
    background:white;
    border-bottom:1px solid var(--border);
    position:sticky;
    top:0;
    z-index:100;
}

.nav{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:1rem 0;
}

.logo{
    display:flex;
    align-items:center;
    gap:1rem;
    font-weight:700;
}

.logo img{
    width:70px;
    height:auto;
    flex-shrink:0;
}

nav{
    display:flex;
    gap:1.5rem;
}

nav a{
    text-decoration:none;
    color:var(--secondary);
}

.hero{
    height:70vh;
    background:url("../images/hero.jpg") center/cover;
    display:flex;
    align-items:center;
    justify-content:center;
    text-align:center;
    color:white;
    position:relative;
}

.hero::before{
    content:"";
    position:absolute;
    inset:0;
    background:rgba(0,0,0,.45);
}

.hero-content{
    position:relative;
    z-index:2;
}

.hero h1{
    font-size:clamp(2rem,5vw,4rem);
}

.card{
    background:white;
    padding:2rem;
    border-radius:var(--radius);
    margin:2rem 0;
    box-shadow:0 10px 30px rgba(0,0,0,.08);
}

.card_impress{
    background:white;
    padding:2rem;
    border-radius:var(--radius);
    margin:2rem 0;
    box-shadow:0 10px 30px rgba(0,0,0,.08);
}

.card_impress p{
	margin-top: 5px;
	margin-bottom: 5px;
}

.card_impress h1{
	margin-top: 10px;
	margin-bottom: 5px;
}
.card_impress h2{
	margin-top: 10px;
	margin-bottom: 5px;
}
.card_impress h3{
	margin-top: 10px;
	margin-bottom: 5px;
}

.card_impress ul{
	margin-top: 10px;
	margin-bottom: 15px;
	margin-left: 30px;
}

.notice{
    margin-top:1rem;
    padding:1rem;
    background:#fff3cd;
    border-radius:12px;
}

.activities{
    display:grid;
    gap:2rem;
    margin:3rem auto;
}

.activity{
    background:white;
    border-radius:var(--radius);
    overflow:hidden;
    box-shadow:0 10px 30px rgba(0,0,0,.08);
}

.activity img{
    width:100%;
    height:250px;
    object-fit:cover;
}

.activity div{
    padding:1.5rem;
}

.button{
    display:inline-block;
    margin-top:1rem;
    padding:.9rem 1.4rem;
    background:var(--primary);
    color:white;
    text-decoration:none;
    border-radius:10px;
}

.page-header{
    padding:5rem 0;
    background:var(--primary);
    color:white;
}

footer{
    background:#0f172a;
    color:white;
    margin-top:4rem;
}

.footer{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:1.5rem 0;
}

.footer a{
    color:white;
}

@media (max-width:768px){

    .nav,
    .footer{
        flex-direction:column;
        gap:1rem;
        text-align:center;
    }

    nav{
        flex-wrap:wrap;
        justify-content:center;
    }

    .hero{
        height:55vh;
    }
}