html {
    overflow: auto;
    width: 100%;
    height: 100%;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 2rem;
    margin: 0;
    overflow-x: hidden;
    overflow-y: auto;

    font-family: 'Inter', sans-serif;
    font-weight: 500;
    line-height: 1.6;
}

.container {
    max-width: 720px;
    width: 100%;
    padding: 32px;
}

/* titles */
h1 {
    font-size: var(--text-size-500);
}

h2 {
    font-size: var(--text-size-400);
}

h3 {
    font-size: var(--text-size-300);
}

h4 {
    font-size: var(--text-size-200);
}

h5 {
    font-size: var(--text-size-100);
}

h2::after {
    content: '';
    display: block;
    width: 100%;
    height: 1px;
    background-color: var(--text-color);
    margin: 12px 0;
    opacity: 0.5;
}

/* body */
.blockformula {
    text-align: center;
    margin: 2rem 0;
    overflow: auto;
}

p, ol {
    overflow-x: auto;
    overflow-y: hidden;
}

/* navigation */
nav {
    margin-top: 120px;
}

nav > a {
    font-size: 0.9rem;
    opacity: 0.8;
    cursor: pointer;
}

/* header */
header {
    margin-top: 28px;
    margin-bottom: 56px;
    .date {
        font-size: 0.8rem;
        opacity: 0.6;
        margin-bottom: 0;
    }
    h1 {
        margin-top: 8px;
        margin-bottom: 12px;
    }
    p {
        margin-top: 12px;
    }
}

/* footer */
footer {
    padding-bottom: 18px;
}