index.css

/* styles.css */

/* Colors 
:dark {
    --primary-bg: #6A6A6A;
    --text-color: #FFFFFF;
    --border-color: #959595;
    --overlay-color: rgba(0, 0, 0, 0.8);
    --link-color: #468EFF;
    --link-hover-color: #2B68FF;
    --header-bg: #000000;
    --search-text-color: #F1F4F5;
    --footer-bg: #000000;
    --footer-text: #FFFFFF;
    --toggle-bg: linear-gradient(to bottom, #F5515F, #CD2942);
}*/
:root {
    --primary-bg: #F1F4F5;
    --secondary-bg: #FAFAFB;
    --text-color: #333333;
    --border-color: #E5E5E5;
    --overlay-color: rgba(0, 0, 0, 0.8);
    --link-color: #468EFF;
    --link-hover-color: #2B68FF;
    --header-bg: #FFFFFF;
    --search-text-color: #636C72;
    --footer-bg: #FAFAFB;
    --footer-text: #4D4A4A;
    --toggle-bg: linear-gradient(to bottom, #F5515F, #CD2942);
}

body {
    background-color: var(--header-bg);
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: var(--header-bg);
    color: var(--text-color);
    padding: 0.2rem;
    display: flex;
    justify-content: center;
    border-bottom: 2px solid var(--border-color);
    align-items: center;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

.logo img {
    width: 350px; /* Adjust as needed */
    height: auto;
    filter: invert(100%);
}

nav ul {
    list-style: none;
    display: flex;
}

nav li {
    font-weight: bold;
    margin-right: 1rem;
}

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

.toggle-btn {
    display: flex;
    margin-left: 10%;
}

main {
    padding: 120px 4rem 80px 4rem; /* Add padding to main to accommodate fixed header */
}

.search-section {
    padding-top: 10px;
    margin-bottom: 4rem;
    display: flex;
    justify-content: center;
}

.search-box {
    display: flex;
    gap: 0.9rem;
    flex-direction: row;
    width: 50%;
    padding: 1rem 1rem 1rem 1.4rem;
    border-radius: 15px;
    background-color: var(--primary-bg);
    border-color: var(--border-color);
    color: var(--search-text-color);
}

.search-box i {
    padding-top: 0.8rem;
}

#searchInput {
    width: 100%;
    font-size: 1.4rem;
    background-color: var(--primary-bg);
    border-color: var(--primary-bg);
    color: var(--search-text-color);
    border: none;
    outline: none;
}

#searchInput::placeholder{
    color: var(--search-text-color);
}

#catalog {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: space-around;
}

.catalog-item {
    display: flex;
    flex-direction: column;
    flex: 0 0 calc(33.33% - 1rem); /* Maximum 3 catalogs in one row with 1rem gap */
    max-width: calc(33.33% - 1rem); /* Maximum width for the catalogs */
    box-sizing: border-box;
    overflow: hidden;
    position: relative;
}

.card {
    flex: 1;
    border-radius: 15px; /* Rounded corners for the card */
    overflow: hidden;
    position: relative;
}

.card img {
    width: 100%;
    height: 100%; /* Ensure the image takes up the full height of the card */
    object-fit: cover;
}

.card img.grayscale {
    filter: grayscale(40%);
    transition: filter 0.3s ease-in-out;
}

.card img:hover {
    filter: grayscale(0%);
    transition: filter 0.3s ease-in-out;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(transparent, transparent, var(--overlay-color)); /* Gradient overlay on card */
    opacity: 0; /* Initially hidden */
    transition: opacity 0.3s ease-in-out;
    z-index: 1;
}

.card:hover::before {
    opacity: 1; /* Make the overlay visible on hover */
}

.card span {
    position: absolute;
    bottom: 0;
    left: 0;
    z-index: 2;
    box-sizing: border-box;
    padding: 1.5rem 1.5rem 1.5rem 2rem;
    color: #FFFFFF;
    opacity: 0; /* Initially hidden */
    transition: opacity 0.3s ease-in-out;
}

.card:hover span {
    opacity: 1; /* Make the title visible on hover */
}

.contributor {
    color: var(--text-color);
    display: flex;
    align-items: center;
    padding: 0.5rem 0.5rem 0.5rem 1rem;    
}

.contributor a {
    text-decoration: none;
    font-weight: 300;
    color: var(--text-color);
    display: flex;
    flex: 1;
    gap: 0.5rem;
    align-items: center;
}

.contributor :hover {
    color: #000;
    font-weight: 500;
}

footer {
    display: flex;
    justify-content: space-between;
    background-color: var(--footer-bg);
    color: var(--footer-text);
    border-top: 2px solid var(--border-color);
    font-weight: lighter;
    padding: 1% 3% 1% 3%;
    position: fixed;
    bottom: 0;
    width: 94%;
}

footer span:nth-child(2) {
    color: var(--footer-text);
}

.wrapper {
    top: 50%;
    left: 50%;
    width: 75px;
    height: 37.5px;
    background: #F1F1F1;
    box-shadow: inset 0px 0px 5px 0px rgba(0, 0, 0, 0.1);
    border-radius: 37.5px;
}

.wrapper .toggle--handler {
    background: var(--toggle-bg);
    width: 30px;
    height: 30px;
    display: block;
    box-shadow: 0px 5px 40px rgba(245, 81, 95, 0.8);
    border-radius: 60px;
    margin: 3.75px;
    position: relative;
    z-index: 2;
    transition: all 200ms cubic-bezier(0.445, 0.05, 0.55, 0.95);
}

.wrapper .toggle--handler:after {
    content: "";
    position: absolute;
    border-radius: 60px;
    background: linear-gradient(to bottom, #468EFF, var(--link-hover-color));
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: all 200ms;
}

.wrapper .toggle--handler:before {
    content: "";
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 24px;
    border-radius: 60px;
    background-image: url('data:image/svg+xml;utf8,<svg width="24" height="24" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>assets/icons/cross</title><g fill="none" fill-rule="evenodd"><path d="M0 0h24v24H0z"/><path d="M0 0h24v24H0z"/><path d="M13.414 11.96l6.546-6.546L18.545 4 12 10.545 5.455 4 4.04 5.414l6.546 6.546-6.89 6.89 1.414 1.413 6.89-6.89 6.89 6.89 1.414-1.414-6.89-6.89z" fill="#FFF"/></g></svg>');
    transition: all 200ms;
    transform: translate(-50%, -50%) rotate(180deg);
}

.wrapper:after {
    content: "";
    top: 50%;
    left: 50%;
    width: 80px;
    height: 2px;
    background: #E5E5E5;
    pointer-events: none;
}

.wrapper input {
    position: absolute;
    left: -999em;
}

input:checked + .toggle .toggle--handler {
    transform: translateX(37.5px);
    background: var(--toggle-bg);
    box-shadow: 0px 5px 40px rgba(70, 142, 255, 0.8);
}

input:checked + .toggle .toggle--handler:after {
    opacity: 1;
}

input:checked + .toggle .toggle--handler:before {
    background-image: url('data:image/svg+xml;utf8,<svg width="24" height="24" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>assets/icons/cross copy</title><g fill="none" fill-rule="evenodd"><path d="M0 0h24v24H0z"/><path d="M0 0h24v24H0z"/><path fill="#FFF" d="M8.293 16.707l.707.707.707-.707 11-11-1.414-1.414-11 11h1.414l-4-4-1.414 1.414z"/></g></svg>');
    z-index: 5;
    transform: translate(-50%, -50%) rotate(0deg);
}