/* SPDX-License-Identifier: MIT — bye base (spec §3.4.1, DESIGN.md): reset, page colours, the browser's
   own surfaces (selection, caret, focus, scrollbars), and the few utilities every page shares.
   site.css and app.css build on it. */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scrollbar-color: var(--line) var(--bg); }
html, body { font: var(--t-body); }
body {
  background: var(--bg); color: var(--fg); min-height: 100svh; overflow-wrap: break-word;
  caret-color: var(--fg); -webkit-tap-highlight-color: transparent;
}
img, svg, canvas, video { display: block; max-width: 100%; }
[hidden] { display: none !important; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-underline-offset: .2em; text-decoration-thickness: 1.5px; }
table { border-collapse: collapse; }
h1, h2, h3 { text-wrap: balance; }
p, li, dd { text-wrap: pretty; }

::selection { background: var(--act); color: var(--on-act); }

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

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}

.mono { font-family: var(--font-code); font-variant-numeric: tabular-nums; }

/* A bar that hides text (the glass box's "not known to us"); [data-revealed] shows the text. */
.redact { background: var(--fg); color: transparent; border-radius: 4px; }
.redact[data-revealed] { background: none; color: inherit; }

.container {
  width: 100%; max-width: calc(var(--content) + 2 * var(--gutter));
  margin-inline: auto; padding-inline: var(--gutter);
}

.skip-link {
  position: absolute; left: var(--gutter); top: var(--s-2); z-index: var(--z-modal);
  padding: 10px 18px; background: var(--bg-raised); color: var(--fg); font: var(--t-ui);
  border-radius: var(--r-pill); box-shadow: var(--shadow); translate: 0 -200%;
}
.skip-link:focus-visible { translate: none; }

@media (prefers-reduced-motion: reduce) {
  *:not(.motion-allowed), *:not(.motion-allowed)::before, *:not(.motion-allowed)::after {
    animation-duration: 0s !important; animation-iteration-count: 1 !important;
    transition-duration: 0s !important; scroll-behavior: auto !important;
  }
}