body {
    background-image: url(images/reef.jpg);
    background-size: cover;
    height: 100vh;
    padding: 0;
    margin: 0;
    font-family: 'Tw Cen MT Std', sans-serif;
}

body.alternate {
    background-image: url(images/rocks.jpg);
    height: 100vh;
}

header {
    width: 100%;
    height: 100px;
    background-color: rgba(226,226,226,0.55);
    border-bottom: 3px solid rgb(226,226,226);
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header img {
    margin-inline-start: 4em;
}

nav ul {
    display: inline-flex;
    padding-inline-start: 0;
    margin-inline-end: 3em;
    gap: 8px;
    list-style-type: none;
}

nav ul li a {
    display: block;
    padding: 32px 30px 28px 30px;
    font-size: 22px;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    text-decoration: none;
    color: #231F20;
    transition: 0.3s;
}

nav ul li a:hover {
    background-color: rgba(0,0,0,0.1);
}

nav ul li a:active {
    background-color: rgba(0,0,0,0.6);
    color: #E2E2E2;
}

.content {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

.main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 133px;
}

.main div {
    width: 482px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

a.btn {
    display: block;
    text-transform: uppercase;
    font-size: 26px;
    text-decoration: none;
    letter-spacing: 0.2em;
    color: #E2E2E2;
    padding: 32px 30px 28px 30px;
    background-color: rgba(226,226,226,0.1);
    background-color: rgba(0,0,0,0.1);
    text-align: center;
    border: 3px solid #E2E2E2;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: all 0.3s ease-in-out;
}

a.btnB {
    display: block;
    text-transform: uppercase;
    font-size: 26px;
    text-decoration: none;
    letter-spacing: 0.2em;
    color: #231F20;
    padding: 32px 30px 28px 30px;
    background-color: rgba(226,226,226,0.1);
    background-color: rgba(0,0,0,0.1);
    text-align: center;
    border: 3px solid #E2E2E2;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: all 0.3s ease-in-out;
}

.imageContainer {
    overflow: hidden;
}

.card img {
    transition: all 0.3s ease-in-out;
}

.card:hover img{
    transform: scale(1.3,1.3)
}

.card:hover a {
    background-color: rgba(0,0,0,0.4);
}

.maingal {

    display: flex;
    flex: 1;
    align-items: center;
    justify-content: center;
}

.maingal ul {
    max-width: 1094px;
    display: flex;
    flex-wrap: wrap;
    row-gap: 19px;
    column-gap: 22px;
    justify-self: start;
    list-style-type: none;
    padding-inline-start: 0;
    margin-block-start: 34px;
    margin-block-end: 80px;
}

.maingal ul li {
    width: 257px;
    /* height: 230px; */
    height: 286px;
}

.maingal ul li a {
    text-decoration: none;
    font-size: 17px;
    text-transform: uppercase;
    color: #606060;
    overflow: hidden;
}

.maingal ul li a img {
    width: 257px;
    transition: all 0.3s ease-in-out;
}

.maingal ul li a:hover img {
    filter:brightness(0.8);
}

.maingal ul li a span{
    display: block;
    padding: 22px 10px 19px 10px;
    text-align: center;
    margin-top: -4px;
    background-color: rgba(226,226,226,0.55);
    border: 1px solid #E2E2E2;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    transition: all 0.3s ease-in-out;
}

.maingal ul li a:hover span {
    background-color: #231F20;
    color:#E2E2E2;
}