* {
    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);
    background-image: url(../images/cactus_large.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

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

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

h3 {
    margin: 2% 5% 1% 5%;
    text-align: center;
    color: var(--main-txt-color);
    font-size: 24px;
}

#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);
}

ul {
    margin: 5% 5% 2% 5%;
    text-align: center;
    color: var(--main-txt-color);
    font-size: 22px;
}

li {
    display: inline;
    padding: 0px 10px 0px 10px;
}

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

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

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

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

#mainnav {
    margin: 5% 5% 2% 5%;
    text-align: center;
    color: var(--main-txt-color);
    font-size: 22px;
}

#mainnav > ul {
    margin: 5% 5% 2% 5%;
    text-align: center;
    color: var(--main-txt-color);
    font-size: 22px;
} 

#mainnav > ul > li {
    display: inline;
    padding: 0px 10px 0px 10px;
}

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

#mainnav > ul > li > a:link {
    color: var(--main-txt-color);
}

#mainnav > ul > li > a:hover {
    color: var(--main-hover-color);
}

#mainnav > ul > li > a:active {
    color: var(--main-act-hover-color);
}

#mainnav > ul > li:hover > #sub::after {
    content: "\21B2"; color: #fff;
    position: absolute; left: 40%; top: 90px;
    transform: translateX(-50%) scale(1.5);
}

#mainnav nav.submenu {
    position: absolute; left: 0px; top: 90px;
    width: 650px; height: 520px;
    z-index: 2;
    display: none;
    box-shadow: 2px 2px 5px #222;
}

#mainnav > ul > li:hover .submenu {
    display: flex;
}

#mainnav nav.submenu > ul {
    list-style-type: none;
    flex: 1 0 50%;
    background-color: grey;
}

#mainnav nav.submenu > ul > li > a {
    display: block; width: 100%; height: 17px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    text-decoration: none;
    color: white;
    line-height: 15px; font-size: .7em;
    text-indent: 10px;
    position: relative;
}

#mainnav nav.submenu > ul > li > a:hover {
    color: var(--main-hover-color);
}

h1::before {
    content: "";
    display: block; width: 50px; height: 50px;
    background-color: transparent;
    border-left: 5px solid #fefae0;
    border-top: 5px solid #fefae0;
    position: absolute; right: 76%; bottom: 67%;
}

h3::after {
    content: "";
    display: block; width: 50px; height: 50px;
    background-color: transparent;
    border-right: 5px solid #fefae0;
    border-bottom: 5px solid #fefae0;
    position: absolute; left: 74%; top: 57%;
}

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

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

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

#imgex {
    background-image: url(../images/cactus.jpg);
    width: 30%; height: 30%;
}

@media screen and (max-width: 1200px) {

    h1::before {
        content: "";
        display: block; width: 30px; height: 30px;
        background-color: transparent;
        border-left: 5px solid #fefae0;
        border-top: 5px solid #fefae0;
        position: absolute; right: 83%; bottom: 87.3%;
    }
    
    h3::after {
        content: "";
        display: block; width: 30px; height: 30px;
        background-color: transparent;
        border-right: 5px solid #fefae0;
        border-bottom: 5px solid #fefae0;
        position: absolute; left: 85%; top: 35%;
    }

    #button {
        margin-left: 37%; margin-top: 7%;
        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;
    }

} 

@media screen and (max-width: 600px) {

    h1::before {
        content: "";
        display: block; width: 30px; height: 30px;
        background-color: transparent;
        border-left: 5px solid #fefae0;
        border-top: 5px solid #fefae0;
        position: absolute; right: 83%; bottom: 81.5%;
    }
    
    h3::after {
        content: "";
        display: block; width: 30px; height: 30px;
        background-color: transparent;
        border-right: 5px solid #fefae0;
        border-bottom: 5px solid #fefae0;
        position: absolute; left: 88%; top: 74%;
    }

    #button {
        margin-left: 22%; margin-top: 7%;
        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;
    }

}