*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    font-size: 1.05rem;
    max-width: 90ch;
    margin: 0 auto;
    padding: 2.5rem 1.25rem 3.5rem;
}

a {
    color: inherit;
}

h1, h2, h3, h4 {
    line-height: 1.25;
    margin: 1.75rem 0 0.5rem;
}

h1 {
    margin-top: 0;
}

p {
    margin: 0 0 1rem;
}

article[id],
section[id],
h2[id] {
    scroll-margin-top: 2rem;
}

header,
section,
article {
    margin: 2.5rem 0;
}

header {
    margin-top: 0;
}

nav {
    margin: 1rem 0 2rem;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
}

hr {
    border: 0;
    border-top: 1px solid rgba(128, 128, 128, 0.35);
    margin: 2.5rem 0;
}

details {
    margin: 1.25rem 0;
}

summary {
    cursor: pointer;
    font-weight: bold;
}

details[open] summary {
    margin-bottom: 0.75rem;
}

figure {
    margin: 1.5rem 0;
}

figure img {
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    display: block;
}

figcaption {
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

dialog {
    border: 1px solid rgba(128, 128, 128, 0.35);
    padding: 1rem;
}

dialog figure {
    margin: 0 0 0.75rem;
}

dialog img {
    max-width: 85vw;
    max-height: 75vh;
    width: auto;
    height: auto;
    aspect-ratio: auto;
}

label {
    display: block;
    margin-bottom: 0.25rem;
    font-weight: bold;
}

input,
textarea {
    width: 100%;
    font: inherit;
    padding: 0.4rem 0.5rem;
}

button {
    font: inherit;
    padding: 0.35rem 0.85rem;
    cursor: pointer;
}

footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
}