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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100dvh;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: var(--step-0);
    line-height: 1.55;
    font-feature-settings: "ss01", "cv11";
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--dur-3) var(--ease-out), color var(--dur-3) var(--ease-out);
}

/* Film grain keeps big dark areas from banding on cheap phone screens. */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 100;
    opacity: var(--grain-opacity);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Easter egg: after 23:00 everything warms up a notch. */
[data-night="1"] body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 99;
    background: radial-gradient(120% 90% at 50% 110%, rgb(255 96 24 / 0.13), rgb(255 120 40 / 0.05) 60%, transparent);
    mix-blend-mode: screen;
}

h1,
h2,
h3,
h4,
.display {
    font-family: var(--font-display);
    font-weight: var(--display-weight);
    letter-spacing: var(--display-tracking);
    line-height: 1.08;
    margin: 0;
    text-wrap: balance;
}

h1 { font-size: var(--step-4); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); }

p {
    margin: 0;
    text-wrap: pretty;
}

a {
    color: var(--accent-2);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:hover {
    color: var(--accent);
}

img,
svg {
    display: block;
    max-width: 100%;
}

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

:focus-visible {
    outline: 2px solid var(--accent-2);
    outline-offset: 3px;
    border-radius: var(--radius-s);
}

::selection {
    background: var(--accent);
    color: var(--accent-ink);
}

.num {
    font-variant-numeric: tabular-nums;
}

.muted { color: var(--text-2); }
.faint { color: var(--text-3); }
.small { font-size: var(--step--1); }

.eyebrow {
    font-size: var(--step--1);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-3);
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.wrap {
    width: 100%;
    max-width: var(--content);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.stack > * + * { margin-top: var(--stack, var(--space-4)); }

.row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--gap, var(--space-3));
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 1ms !important;
        scroll-behavior: auto !important;
    }
}

.icon {
    width: 1.25em;
    height: 1.25em;
    flex: none;
}

[hidden] {
    display: none !important;
}

/* ---------- Scrollbars: thin graphite rail with a warm ember thumb ---------- */
:root {
    --scroll-thumb: color-mix(in oklab, var(--accent) 70%, var(--text-3));
    scrollbar-color: var(--scroll-thumb) transparent;
    scrollbar-width: thin;
}

/* Engines without scrollbar-color (older Safari) get the same look via the WebKit pseudos. */
@supports not (scrollbar-color: red blue) {
    ::-webkit-scrollbar { width: 10px; height: 10px; }
    ::-webkit-scrollbar-track { background: transparent; }
    ::-webkit-scrollbar-thumb { border: 3px solid transparent; border-radius: 10px; background: var(--scroll-thumb) padding-box; }
    ::-webkit-scrollbar-thumb:hover { background: linear-gradient(var(--ember-2), var(--accent)) padding-box; }
    ::-webkit-scrollbar-corner { background: transparent; }
}