/* Reset, element defaults and layout helpers. Loaded after tokens.css. */

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

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
figure,
blockquote,
dl,
dd {
    margin: 0;
}

img,
picture,
svg,
video {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Keep these at 16px or larger. Below that iOS zooms the whole page in the
   moment the field gets focus, and it never zooms back out. */
button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

/* Anything you tap needs room for a fingertip. Links in a sentence are left
   out on purpose: they belong in the text flow, not in a 44px box. */
button,
select,
[type="button"],
[type="submit"],
[type="reset"] {
  min-height: var(--tap-target);
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background-color: var(--surface-page);
    color: var(--text-body);
    font-family: var(--font-body);
    font-size: var(--fs-md);
    font-weight: var(--fw-regular);
    line-height: var(--lh-body);
    -webkit-font-smoothing: antialiased;
}

/* Headings already get the right font, colour and size. Add nothing yourself. */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-heading);
    font-family: var(--font-heading);
    font-weight: var(--fw-bold);
    letter-spacing: var(--ls-heading);
}

h1 {
    font-size: var(--fs-h1);
    line-height: var(--lh-tight);
}

h2 {
    font-size: var(--fs-h2);
    line-height: var(--lh-tight);
}

h3 {
    font-size: var(--fs-h3);
    line-height: var(--lh-snug);
}

h4 {
    font-size: var(--fs-h4);
    line-height: var(--lh-snug);
}

h5 {
    font-size: var(--fs-h5);
    line-height: var(--lh-snug);
}

h6 {
    font-size: var(--fs-h6);
    line-height: var(--lh-snug);
}

p {
    max-width: 70ch;
}

strong,
b {
    font-weight: var(--fw-semibold);
}

small {
    font-size: var(--fs-xs);
}

a {
    color: var(--text-heading);
    text-decoration-color: var(--accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    transition: color var(--transition);
}

a:hover {
    color: var(--text-muted);
}

ul,
ol {
    padding-left: var(--space-xl);
    margin: 0;
}

code,
pre,
kbd {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
}

code {
    padding: 0.1em 0.4em;
    border-radius: var(--radius-sm);
    background-color: var(--accent-soft);
    color: var(--text-heading);
}

pre {
    overflow-x: auto;
    padding: var(--space-lg);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    background-color: var(--surface-2);
}

pre code {
    padding: 0;
    background: none;
}

hr {
    height: 1px;
    border: 0;
    background-color: var(--border-subtle);
}

/* Keyboard users must always see where they are. Do not remove. */
:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* layout */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.section {
    padding-block: var(--space-4xl);
}

.section--tight {
    padding-block: var(--space-2xl);
}

.grid {
    display: grid;
    gap: var(--space-xl);
}

@media (min-width: 640px) {
    .grid--2,
    .grid--4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .grid--3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid--4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* utilities */
.stack > * + * {
    margin-top: var(--space-lg);
}

.text-muted {
    color: var(--text-muted);
}

.text-center {
    text-align: center;
}

.lead {
    font-size: var(--fs-xl);
    color: var(--text-body);
}

.overline {
    font-family: var(--font-heading);
    font-size: var(--fs-xs);
    font-weight: var(--fw-bold);
    letter-spacing: var(--ls-overline);
    color: var(--text-muted);
}

.mono {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}