* {
    margin: 0; padding: 0; border: 0; box-sizing: border-box;
}

:root {
    --main-bg-color: #2f3e46;
    --main-txt-color: white;
    --main-button-color: #343a40;
    --main-hover-color: #606c38;
    --main-btn-hover-color: #212529;
    --main-height: 100vh; 
    --main-act-hover-color: #fefae0;
    --main-visit-hover-color: #dda15e;
}

body {
    background-color: var(--main-bg-color);
    height: var(--main-height);
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

nav {
    margin: 1% 5% 1% 5%;
    text-align: center;
    color: var(--main-txt-color);
    font-size: 22px;
    display: inline;
    padding: 0px 10px 0px 10px;
}

nav > a {
    text-decoration: none;
    color: var(--main-txt-color);
    font-size: 18px;
    font-weight: bold;
}

nav > a:link {
    color: var(--main-txt-color);
}

nav > a:visited {
    color: var(--main-visit-hover-color);
}

nav > a:hover {
    color: var(--main-hover-color);
}

nav > a:active {
    color: var(--main-act-hover-color);
}

main {
    min-height: 100vh;
    display: flex;
    flex-flow: row wrap;
}

main div {
    border: 4px solid #fefae0;
    min-width: 200px; min-height: 200px;
    flex: 1 0 30%;
    margin: 5px;
    padding: 2em;
}

h1 {
    margin: 4% 5% 2% 5%;
    text-align: center;
    color: var(--main-txt-color);
    font-size: 72px;
}

h2 {
    color: var(--main-txt-color);
    font-size: 32px;
}

h3 {
    color: var(--main-txt-color);
    font-size: 22px;
    padding: .5em;
    border-bottom: 2px dashed #fefae0;
}

p {
    color: var(--main-txt-color);
    padding: .5em;
}

#button {
    margin-left: 42%; margin-top: 1.5%;
    color: var(--main-txt-color);
    background-color: var(--main-button-color);
    padding: 14px 35px;
    font-size: 18px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    border-radius: 4px;
}

#button:hover {
    color: var(--main-btn-hover-color);
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24), 0 17px 50px 0 rgba(0,0,0,0.19);
}

#rgb {
    color: rgb(200, 20, 30);
}

#rgb2 {
    color: rgb(100, 10, 20);
}

#rgb3 {
    color: rgb(50, 5, 10);
}

#imgex {
    background-image: url(../images/cactus_large.jpg);
    width: 30%; height: 30%;
    background-repeat: no-repeat;
    background-size: cover;
}
 
li:nth-child(3) {
    font-weight: bold;
}

#blur {
    font-size: 32px;
    filter: blur(2px);
    margin: 3%;
}

#rotate {
    transform: rotate(-15deg);
}