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

body{
    font-family: 'Inter',sans-serif;
    line-height: 1.6;
    color: #222;
    background: #f7f9fc;
}

a{
    text-decoration: none;
    color: inherit;
}

html{
    scroll-behavior: smooth;
}

html,body{
    overflow-x: hidden;
}
h1,h2{
    margin-bottom: 20px;
}

header{
    margin: 0;
    padding: 0;
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 80px;
    position: sticky;
    top: 0;
    margin:0;
    background: #100f1b;
    z-index: 100;
}

.hero{
    padding:0;
}

.explore,.types,.why,.about_content{
    padding: 80px;
}

.about_hero{
    padding: 90px 20px;
}
.navbar nav a{
    margin-left: 30px;
    font-weight: 500;
    color: white;
}

.naver nav a:hover{
    color: #eef0f1;
}

.hero{
    height: 90vh;
    background: linear-gradient(
        rgba(0,0,0,0.45),
        rgba(0,0,0,0.45)
    ),
    url("assets/images/hero_bg.png") center/cover no-repeat;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #fff;
    text-align: center;
}

section h2{
    font-size: 2.2rem;
    font-weight: 600;
}

.hero h1{
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 10px;
}

.hero p{
    font-size: 1.2rem;
    margin-bottom: 25px;
}

.hero button , .learn{
    padding: 12px 30px;
    border: none;
    background: #0077ff;
    color:#fff;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 4px;
}

.hero button:hover , .learn:hover {
    background: #005ad1;
}

.cards{
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(260px,1fr));
    gap:30px;
}

.card{
    position: relative;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    transition: transform 0.3s ease;
}

.explore .card p{
    position: absolute;
    bottom: 15px;
    left: 15px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
}

.card p{
    padding: 15px;
    font-weight: 600;
    text-align: center;
    color: #222;
}
.explore,.types{
    background: #f7f9fc;
}

section{
    padding: 80px 80px;
}
.card:hover{
    transform: translateY(-8px);
    cursor: pointer;
}

.card img{
    width: 100%;
    display: block;
}

.card p{
    padding: 15px;
    font-weight: 600;
    text-align: center;
}

.why{
    text-align: center;
}

.why img{
    max-width: 500px;
    width: 100%;
}

footer{
    text-align: center;
    padding: 40px;
    background: #c4c4c4;
    color: #fff;
}


.explore{
    background: #f7f9fc;
}

.types{
    background: #ffffff;
}

.why{
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 50px;
    background: #efefef;
}

.why h2{
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.why ul{
    list-style: none;
}

.why ul li{
    margin-bottom: 12px;
    font-size: 1rem;
    color: #333;
}

.why_image img{
    width:100%;
    border-radius: 10px;
}

.about_hero{
    padding: 90px 20px;
    text-align: center;
    background: #f7f9fc;
}

.about_hero h1{
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.about_hero p{
    font-size: 1.1rem;
    color:#555;
}
.about_content{
    padding: 80px 20px;
    background: #ffffff;
}
.container{
    max-width: 1100px;
    margin: 0 auto;
}

.about_card{
    text-align: center;
    padding: 20px;
    min-height: 260px;

    display: flex;
    flex-direction: column;
    justify-content: center;
}

.about_card img{
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom:20px;
}

.about_card h3{
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.about_content{
    padding: 80px 20px;
    background: #ffffff;
}

.navbar nav a.active{
    color: #0077ff;
    font-weight: 600;
}

.footer{
    background: #100f1b;
    color: #fff;
    padding: 50px 20px;
    text-align: center;
}

.logo-footer{
    width: 120px;
    margin-bottom: 20px;
}

.footer-social{
    margin-bottom: 20px;
}

.footer-social a{
    color: #fff;
    font-size: 1.4rem;
    margin: 0 12px;
    transition: color 0.3s ease;
}

.footer-social a:hover{
    color: #0077ff;
}

.footer-contact p{
    margin: 6px 0;
    color: #cfcfcf;
    font-size: 0.95rem;
}

.footer-contact i{
    margin-right: 8px;
    color: #0077ff;
}

.footer-copy{
    margin-top: 25px;
    font-size: 0.85rem;
    color: #999;
}

@media(max-width:768px){
    .about_hero h1{
        font-size: 2.2rem;
    }
    .about_content{
        padding: 50px 15px;
    }
    .why{
        grid-template-columns: 1fr;
        text-align: center;
    }
    section{
        padding:40px 20px;
    }
    .navbar{
        padding:15px 20px;
    }

    .hero h1{
        font-size: 2.2rem;
    }
}

@media(max-width:900px){
    .cards{
        grid-template-columns: repeat(2,1fr);
    }
}
@media(max-width:600px){
    .cards{
        grid-template-columns: 1fr;
    }
}