* {
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}

.underline-animate {
    position: relative;
    color: #137a7f;
    text-decoration: none;
    padding-bottom: 0.25rem;
    transition: color 0.3s;
}

.underline-animate::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0;
    height: 0.1875em;
    background: #86cecb;
    transform: translateX(-50%);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

.underline-animate:hover {
    color: #000;
}

.underline-animate:hover::after {
    width: 100%;
    left: 0;
    transform: none;
}

a.underline-animate {
    color: inherit;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3.75rem;
    line-height: 3.75rem;
    background-color: white;
    box-shadow: 0 0.125rem 0.3125rem rgba(0, 0, 0, 0.1);
    z-index: 100;
    opacity: 0;
    animation: fadeInAnim 0.5s ease forwards;
}

nav a {
    color: #333;
    text-decoration: none;
    margin: 0 1rem;
    font-weight: 500;
}

@keyframes fadeInAnim {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

a:link {
    color: #137a7f;
}

a:visited {
    color: #137a7f;
}

a:hover {
    color: #86cecb;
}

a:active {
    color: #86cecb;
}

a.underline-animate {
    color: inherit;
}

footer {
    padding: 1.25em;
    font-size: 0.875em;
    color: #666;
    text-align: center;
}