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

html, body {
    width: 100%;
    height: 100%;
}

@font-face {
    font-family: 'PTSans';
    src: url(../fonts/PTSans-Regular.ttf)format('truetype');
}

@font-face {
    font-family: 'Ubuntu';
    src: url(../fonts/Ubuntu-Regular.ttf)format('truetype');
}

:root {
    --primary-color: #007BFF;
    --text-color: #333333;
    --background-color: #F5F5F5;
    --hover-color: rgba(0, 123, 255, 0.85);
}

body {
    font-family: 'PTSans', sans-serif;
    color: var(--text-color);

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

header {
    width: 100%;

    display: flex;
    justify-content: center;
}

.nav-bar {
    width: 60%;
    height: 4rem;

    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    font-family: 'Ubuntu';
    text-transform: lowercase;
}

#cs {
    color: var(--primary-color);
}

main {
    width: 100%;

    display: flex;
    justify-content: center;
}

.container {
    width: 60%;

    text-align: center;
}

h1 {
    font-size: 1.75rem;
}

h2 {
    font-size: 1.5rem;
}

.tagline, .note {
    text-align: center;
}

.btn {
    background-color: var(--primary-color);
    border-radius: 0.5rem;

    padding: 0.5rem 0.65rem;
    cursor: pointer;
}

.btn > a {
    text-decoration: none;
    color: #FFF;
}

.btn:hover {
    background-color: var(--hover-color);
}

table {
    width: 100%;

    border: 1px solid var(--text-color);
    border-collapse: collapse;

    margin: 1rem 0;
}

th, td {
    text-align: center;

    border: 1px solid var(--text-color);
    padding: 0.5rem 0.65rem;
}

td > a {
    text-decoration: none;
}

footer {
    width: 100%;

    display: flex;
    justify-content: center;

    padding: 1rem 0;
}

.footer {
    font-size: 0.95rem;
}

@media (max-width: 1200px) and (min-width: 993px) {
    .nav-bar, .container {
        width: 70%;
    }
}

@media (max-width: 992px) and (min-width: 769px) {
    .nav-bar, .container {
        width: 80%;
    }
}

@media (max-width: 768px) and (min-width: 577px) {
    .nav-bar, .container {
        width: 88%;
    }

    .logo {
        font-size: 1.4rem;
    }

    h1 {
        font-size: 1.65rem;
    }

    h2 {
        font-size: 1.45rem;
    }
}

@media (max-width: 576px) and (min-width: 301px) {
    .nav-bar, .container {
        width: 92%;
    }

    .logo {
        font-size: 1.25rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.3rem;
    }

    .footer {
        font-size: 0.85rem;
    }
}