* {
    box-sizing: border-box;
}

@font-face {
    font-family: "Aptos";
    src: url("aptos.ttf");
    font-weight: 500;
}

@font-face {
    font-family: "Aptos";
    src: url("aptos-semibold.ttf");
    font-weight: 600;
}

@font-face {
    font-family: "Aptos";
    src: url("aptos-bold.ttf");
    font-weight: 700;
}

body {
    font-family: "Aptos", sans-serif;
    background-color: #FAFAFA;
    margin: 0;
}

section {
    animation: fade 0.2s;
    padding-left: 300px;
}

h1 {
    font-size: 36px;
    margin-bottom: 0;
}

@keyframes fade {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

nav {
    width: 300px;
    top: 0;
    float: left;
    height: 100%;
    position: fixed;
    background-color: #FFFFFF;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

nav a {
    display: block !important;
    width: 100%;
    padding: 20px 30px;
    color: #636363;
    text-decoration: none;
}

nav a:hover {
    color: #212121;
    font-weight: bold;
}

nav a.active {
    color: #f44436;
    font-weight: bold;
}

header {
    padding: 0 50px;
}

header img {
    float: right;
    width: 100px;
}

article {
    padding: 20px 50px;
}

article a {
    color: #0276aa;
    text-decoration: none;
}

article a:hover {
    text-decoration: underline;
}

hr {
    border-top: 1px solid lightgray;
}

p {
    font-family: #424242;
    line-height: 24px;
    font-size: 18px;
}

h2 {
    font-weight: 600;
}

.float::after {
    content: "";
    display: table;
    clear: both;
}

.float .sec {
    float: left;
    margin-right: 30px;
}

.float .sec img {
    width: 100px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 100%;
    padding: 15px;
}

.float .sec h3 {
    font-weight: 600;
    text-align: center;
    margin: 0;
}

button {
    padding: 8px 15px;
    border: 2px solid #f44436;
    background-color: transparent;
    border-radius: 2px;
    color: #f44436;
    font-family: "Aptos", sans-serif;
    font-weight: bold;
    cursor: pointer;
}

button.big {
    padding: 8px 20px;
    font-size: 16px;
}

button:hover {
    background-color: #f44436;
    color: white;
}