header {
    display: flex;
    background-size: cover;
    background-position: center;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 100vh;
}

header::before {
    content: '';
    background-image: url('/assets/v1/img/el/header-bg.png');
    background-size: cover;
    background-position: center;
    z-index: -1;
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    /* 
    이미지 아래 부분으로 갈수록 흐리게 
    */
    -webkit-mask-image: linear-gradient(to bottom,
        black 0%,
        rgba(0, 0, 0, 0.9) 20%,
        rgba(0, 0, 0, 0.8) 90%,
        transparent 100%
    );
    mask-image: linear-gradient(to bottom,
        rgba(0, 0, 0, 0.0) 0%,
        rgba(0, 0, 0, 0.9) 10%,
        rgba(0, 0, 0, 0.2) 30%,
        rgba(0, 0, 0, 0.2) 70%,
        rgba(0, 0, 0, 0.9) 90%,
        transparent 100%
    );


    /* 원형 중심부만 어두워지게 마스킹 */
    /* -webkit-mask-image: radial-gradient(
        circle, 
        rgba(0, 0, 0, 0.1) 0%,
        rgba(0, 0, 0, 0.1) 40%,
        rgba(0, 0, 0, 0.7) 80%,
        rgba(0, 0, 0, 0.9) 100%);
    mask-image: radial-gradient(
        circle, 
        rgba(0, 0, 0, 0.1) 0%,
        rgba(0, 0, 0, 0.1) 40%,
        rgba(0, 0, 0, 0.7) 80%,
        rgba(0, 0, 0, 0.9) 100%); */
}

header .header-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 500px;
    gap: 20px;
}


header .logo {
    width: 500px;
}


header .info-container {
    display: flex;
    flex-direction: column;
    gap: 0px;
    align-items: center;
}

header .date {
    font-family: var(--font-poppins);
    font-size: 40px;
    font-weight: 500;
    color: #fff;
    margin: 0;
}

header .venue {
    font-family: var(--font-poppins);
    font-size: 24px;
    font-weight: 100;
    color: #fff;
    margin: 0;
}


header .desc {
    font-size: 18px;
    font-weight: 300;
    color: #fff;
    margin: 30px 0 20px 0;
    max-width: 800px;
    text-align: center;
}

header .btn-grp {
    position: absolute;
    bottom: 100px;
}

@media (max-width: 1100px) {
    header .logo {
        width: 80%;
    }
}
@media (max-width: 768px) {
    header .logo {
        width: 280px;
    }
    header .date {
        font-size: 24px;
    }
    header .venue {
        font-size: 18px;
    }
    header .btn-grp {
        bottom: 80px;
    }
    header .header-container {
        margin-bottom: 4vh;
    }
}

/* 
@media (max-width: 480px) {
} */