style.css

:root {
    --lime-green: hsl(163, 72%, 41%);
    --bright-red: hsl(356, 69%, 56%);

    --facebook: hsl(208, 92%, 53%);
    --twitter: hsl(203, 89%, 53%);
    --instagram: linear-gradient(to right, hsl(37, 97%, 70%) 0%, hsl(329, 70%, 58%) 100%);
    --youtube: hsl(348, 97%, 39%);

    /* Light */
    --toggle: hsl(230, 22%, 74%);
    --toggle-hover: linear-gradient(to right, hsl(210, 78%, 56%) 0%, hsl(146, 68%, 55%) 100%);
    --background-linear-light: linear-gradient(to bottom, hsl(225, 100%, 98%) 230px, hsl(0, 0%, 100%) 0);
    --top-bg-pattern: hsl(225, 100%, 98%);
    --card-bg: hsl(228deg 28% 20%);
    --primary-text: hsl(0, 0%, 100%);
    --secondary-text-color: hsl(228, 34%, 66%);
    --brightness: brightness(120%);

    /* Dark */
    --background: linear-gradient(to bottom, hsl(232, 19%, 15%) 230px, hsl(230, 17%, 14%) 0%);
    --primary-text-color: hsl(0, 0%, 100%);

}

.light {
    --toggle: hsl(230, 22%, 74%);
    --toggle-hover: linear-gradient(to right, hsl(210, 78%, 56%) 0%, hsl(146, 68%, 55%) 100%);
    --background: linear-gradient(to bottom, hsl(225, 100%, 98%) 230px, hsl(0, 0%, 100%) 0);
    --top-bg-pattern: hsl(225, 100%, 98%);
    --card-bg: hsl(227, 47%, 96%);
    --primary-text: hsl(230, 17%, 14%);
    --secondary-text-color: hsl(228, 12%, 44%);
    --brightness: brightness(85%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter',
        sans-serif;
}

body {
    font-size: 14px;
    font-family: 'Inter',
        sans-serif;
    background: var(--background);
    background-repeat: no-repeat;
    background-size: cover;
    color: var(--primary-text);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    transition: .3s !important;
}


/* Main Container Styling */

.contianer {
    max-width: 1140px;
    height: 100%;
    margin: 50px auto;
}

/* Header Section */
.header {
    display: flex;
    flex-flow: row;
    justify-content: space-between;
    margin-bottom: 2.5rem;
}

.header-left h1 {
    color: var(--primary-text);
    transition: .3s;
}

.header-left .total-followers {
    font-weight: 700;
    transition: .3s;
    color: var(--secondary-text-color);
}

.header-right {
    display: inline-flex;
    flex-flow: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    color: var(--secondary-text-color);
    font-weight: 700;
    transition: .3s;
}


/* End Header Section */

/* Cards Section Styling */
.cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-column-gap: 30px;
    grid-row-gap: 20px;
}

.card {
    padding: 30px 40px;
    background: var(--card-bg);
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-flow: column;
    text-align: center;
    border-top: 4px solid var(--facebook);
    position: relative;
}

/* Cards Custom Border */
.card:nth-child(2) {
    border-top: 4px solid var(--twitter);
}

.card:nth-child(3) {
    border: none;
}

.card:nth-child(3)::before {
    content: '';
    width: 100%;
    height: 4px;
    position: absolute;
    top: 0;
    left: 0;
    background: var(--instagram);
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
}

.card:nth-child(4) {
    border-top: 4px solid var(--youtube);
}

/* End Cards Custom Border */

.card:hover,
.card-overview:hover {
    filter: var(--brightness);
    transition: .3s;
    transform: translateY(-5px);
    cursor: pointer;
}

.card-overview {
    padding: 20px 30px;
    background: var(--card-bg);
    border-radius: 5px;
}

/* Summary Section Styling */
.summary {
    margin: 50px auto;
}

.usern-info {
    display: flex;
    flex-flow: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 5px;
    font-weight: 700;
    color: var(--secondary-text-color);
    font-size: 13px;
}

.followers {
    margin: 20px auto;
}

.followers h2 {
    font-size: 3rem;
    color: var(--primary-text);
    transition: color 1.3s;
}

.followers span {
    letter-spacing: 5px;
    font-weight: 300;
}

.todays-stats {
    display: inline;
    color: var(--lime-green);
    align-items: center;
    font-weight: 700;
}

.todays-stats-down {
    color: var(--bright-red);
    display: inline;
    align-items: center;
    font-weight: 700;
}

.todays-stats img,
.todays-stats-down img {
    margin-bottom: 3px;
}

/* End Summary Section Styling */


/* Overview Section Styling */

.overview h2 {
    color: var(--primary-text);
    margin-bottom: 20px;
}

.card-items {
    display: flex;
    flex-flow: column;
    justify-content: space-between;
    gap: 30px;
}

.card-items h3 {
    font-size: 2rem;
    color: var(--primary-text);
    line-height: 0.8;
}

.card-top,
.card-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-weight: 700;
    color: var(--secondary-text-color);
}

.rate {
    display: flex;
    justify-content: center;
    align-items: center;
    align-self: flex-end;
    gap: 3px;
}

.rate-up {
    color: var(--lime-green);
    font-weight: 700;
}

.rate-down {
    color: var(--bright-red);
    font-weight: 700;
}

/* End Overview Section Styling */

/* End Main Container Styling */

/* Custom Toggle Switch */
/* The switch - the box around the slider */
.switch {
    position: relative;
    display: inline-block;
    width: 55px;
    height: 25px;
    cursor: pointer;
}

/* Hide default HTML checkbox */
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

/* The slider */
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--toggle-hover);
    -webkit-transition: .4s;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background: var(--background);
    -webkit-transition: .4s;
    transition: .4s;
}

input:checked+.slider {
    background: var(--toggle);
}

input:checked+.slider:hover {
    background: var(--toggle-hover);
}

input:checked+.slider:before {
    -webkit-transform: translateX(29px);
    -ms-transform: translateX(29px);
    transform: translateX(29px);
    background: #ffffff;
}

/* Rounded sliders */
.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Footer Attribution Styling */
.attribution {
    font-size: 14px;
    text-align: center;
    margin: 20px auto;
}

.attribution a {
    color: var(--lime-green);
    font-weight: 700;
}

/* Responsive Media Queries */

/* Extra small devices (portrait phones, less than 576px) */
@media (max-width: 575.98px) {
    .contianer {
        max-width: 90%;
    }

    .header {
        flex-flow: column;
        gap: 50px;
    }

    .header-heading {
        font-size: 1rem;
    }

    .header-left {
        position: relative;
    }

    /* Horizontal Line After Between two Header Content */
    .header-left::after {
        content: '';
        width: 100%;
        height: 1px;
        position: absolute;
        bottom: -50%;
        left: 0;
        background: var(--secondary-text-color);
        opacity: 0.5;
    }

    .header-right {
        justify-content: space-between;
    }

    .cards {
        grid-template-columns: repeat(1, 1fr);
    }
}

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .contianer {
        max-width: 90%;
    }

    .header {
        flex-flow: column;
        gap: 50px;
    }

    .header-left {
        position: relative;
    }

    /* Horizontal Line After Between two Header Content */
    .header-left::after {
        content: '';
        width: 100%;
        height: 1px;
        position: absolute;
        bottom: -50%;
        left: 0;
        background: var(--secondary-text-color);
        opacity: 0.5;
    }

    .header-right {
        justify-content: space-between;
    }

    .cards {
        grid-template-columns: repeat(1, 1fr);
    }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) and (max-width: 991.98px) {
    .contianer {
        max-width: 80%;
    }

    .cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) and (max-width: 1199.98px) {
    .contianer {
        max-width: 80%;
    }

    .cards {
        grid-template-columns: repeat(2, 1fr);
    }
}