:root {
    --primary-color: #264653;
    --primary-color-light: #2a9d8f;
    --background-color: #e6fffc;
    --background-color-dark: #333;
    --text-color: #f4f4f4;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--background-color);
}

header {
    background-color: var(--primary-color);
    color: var(--text-color);
    height: 90px;
    margin: 10px 0px;
    padding: 7px 20px;
}

header h1 {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 42px;
    margin: 10px;
    text-shadow: 3px 3px 3px #16262c;
}

main {
    background-color: var(--background-color);
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 15.4px;
    overflow: hidden;
    padding: 20px 30px;
}

aside {
    background-color: var(--background-color);
    float: right;
    padding: 0px 20px;
    margin: 0 0 20px 20px;
    width: 27%;
    border: 2px dashed #2a9d8f;
    border-radius: 10px;
}

.popular-games-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.column-card {
    display: inline-block;
    width: 20%;   
    vertical-align: top;
    border: 2px solid #2a9d8f;
    border-radius: 5px;
    padding: 8px 30px;
    margin: 2.38%;
}

.tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dashed black;
    cursor: help;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 215px;
    background-color: var(--background-color-dark);
    color: var(--text-color);
    text-align: center;
    font-size: 20px;
    border-radius: 6px;
    padding: 8px;
    position: absolute;
    bottom: 125%;
    left: 43%;
    margin-left: -90px;
    opacity: 0;
    transition: opacity 0.4s;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

.tooltip2 {
    position: relative;
    display: inline-block;
    border-bottom: 1px dashed black;
    cursor: help;
}

.tooltip2 .tooltiptext2 {
    visibility: hidden;
    width: 270px;
    background-color: var(--background-color-dark);
    color: var(--text-color);
    text-align: center;
    font-size: 20px;
    border-radius: 6px;
    padding: 8px;
    position: absolute;
    bottom: 125%;
    left: 12%;
    margin-left: -90px;
    opacity: 0;
    transition: opacity 0.4s;
}

.tooltip2:hover .tooltiptext2 {
    visibility: visible;
    opacity: 1;
}

footer {
    display:block;
    background-color: var(--primary-color);
    color: var(--text-color);
    font-family:Arial, Helvetica, sans-serif;
    text-align: center;
    padding: 25px 25px;
}

footer a{
    color: var(--primary-color-light)
}