/* header */

body {
    font-family: 'Poppins', sans-serif;
    font-weight: 300;
}

header {
    position: relative;
}

header .forms input.form-control {
    color : white;
    background-color: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.3)
}

/* :: 가상 요소 선택자 -> header의 "Search Github" placeholder 좀 진하게 */
header .forms input.form-control::placeholder {
    color: rgba(255,255,255,.6);
    position: relative;
}

/* 속성 선택자 -> OFFCANVAS 속성 선택 */
header [data-bs-toggle='offcanvas'] {
    display: none;
}
header .offcanvas .list-group-item {
    padding: 16px;
}
header .offcanvas .list-group-item a {
    color: black;
    text-decoration: none;
}
header .offcanvas .list-group-item a:hover {
    text-decoration: underline;
}
@media (max-width: 992px) {
    header .logo {
        flex-grow: 1;
    }
    header .nav,
    header .forms input.form-control,
    header .forms .btn-link {
        display: none;
    }
    /* 햄버거 버튼 */
    header [data-bs-toggle='offcanvas'] {
        display: block;
    }
}

/* Hero Contents */
section.hero {
    background-color: #040d22;
    position: relative;
    overflow: hidden;  
}

section.hero .container {
    padding-top: 160px;
    padding-bottom: 160px;
    position: relative;
}

section.hero .headline h1 {
    font-size: 68px;
    font-weight:700;
    letter-spacing: -2px;
}

section.hero .headline p {
    font-size: 26px;    
}

section.hero img.globe {
    width: 900px;
    position: absolute;    /* position 기준이 되는 부모 요소가 필요함 */
    top: -5%;
    left: 46%;
}

section.hero img.glow {
    width: 200%;
    height: 200%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

section.hero .curve {
    position: absolute;
    bottom: -1px;
    left: 0;
}

/* YOUTUBE */

section.youtube {

}

section.youtube .container {
    padding-top: 90px;
    padding-bottom: 70px;
    position: relative;
}

section.youtube img.astronaut {
    width: 480px;
    position: absolute;
    top: -420px;
    right:0;
}

section.youtube .ratio {
    border-radius: 10px;
    overflow: hidden;
    background-color: black;
    
}

/* 우주비행사 이미지는 breakpoint md 사이즈 이하일 때 없어지도록 */
@media (max-width: 768px) {
    section.youtube img.astronaut {
        display: none;
    }
}

 /* FEATURES */

section.features {

}

 section.features .container {
     padding-top: 30px;
     padding-bottom: 30px;
 }

 section.features .card {
     color: #627597;
     border: none;
 }

 section.features .card img {
     padding: 30px 60px
 }

 @media (max-width: 576px) {
     section.features .card img {
         padding: 20px 30px;
     }
 }

 /* Google Map */
 section.map {
     padding-top: 100px;
     padding-bottom: 100px;
     color: #627597;
 }

 section.map h1 {
     font-size: 44px;
     font-weight: 700;
 }

 section.map p {
     font-size: 24px;
 }

 #map {
     height: 500px;
     border: 1px solid rgba(0,0,0,.2);
     border-radius: 10px;
     z-index: 1;
 }

 /* footer */

 footer {
    background-color: #040d22;
    position: relative;
    margin-top: 20%;
 }

 footer .curve {
     position: absolute;
     top: -1px;
     left: 0;
     transform: scale(1,-1);
 }

 footer .container {

 }

 footer img.illustration {
    width: 100%;
    margin-top: -33%;
    margin-bottom: 50px;
    transform: scale(-1,1);
 }

 footer img.logo {
     opacity: .4;
 }

footer h5 {
    font-weight: 700;
    color: rgba(255,255,255, .4);
}

footer ul li {
    margin-bottom: 10px;
}

footer ul li a {
    color: rgba(255,255,255,.4);
    text-decoration: none;
    transition: .3s;
}

footer ul li a:hover {
    color: white;
}

footer .site-links {
    margin: 0;
    margin-top: 60px;
    padding: 20px;
    background-color: rgba(255,255,255,.05);
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

footer .site-links li {
    color: rgba(255,255,255,.4);
    margin:0;
    margin-right: 20px;
}

footer .site-links li:last-child {
    margin-right: 0;
}

@media (max-width: 992px) {
    footer {
        text-align: center;
    }
    footer img.logo {
        margin-bottom: 50px;
    }
}