:root {
    --bg-color: black;
    --secondary-bg: rgb(0, 15, 83);
    --title-text-color: #497292;
    --text-color: rgb(139, 142, 185);
    --main-font: Arial;
    --link-color: rgb(79, 91, 204);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--main-font);
    box-sizing: border-box;
}

h1 {
    color: var(--title-text-color);
}

.hidden {
    color: rgba(0, 0, 0, 0);
}

.content {
    margin: 0 auto;
    display: block;
    width: 90vw;
    max-width: 650px;
    text-align: center;
    box-sizing: border-box;
}

.no-select {
    user-select: none;
}

.fade-1s {
    animation: fade 1s 1;
}

.fade-4s {
    animation: fade 4s 1;
}

.fade-5s {
    animation: fade 5s 1;
}

.fade-6s {
    animation: fade 6s 1;
}

.fade-7s {
    animation: fade 7s 1;
}

a {
    color: var(--link-color)
}

.button-link {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.9em;
    font-weight: bold;
    margin: 1em auto;
    width: fit-content;
    display: block;
    box-sizing: border-box;
    background-color: var(--secondary-bg);
    transition: background-color 0.3s, color 0.3s;
}

.button-link:hover {
    background-color: rgb(4, 0, 255);
    color: white;
    transition: background-color 0.3s, color 0.3s;
}

@keyframes fade {
    0% {
        opacity: 0.0;
    }
    100% {
        opacity: 1.0;
    }
}