/* Shared by the resources page (blog.html) and every post: the night/day
   colors, type and base styles. Night is Vim's classic "blue" colorscheme;
   day is navy ink on warm paper. js/theme.js sets data-theme on <html>. */

/* ---------- tokens ---------- */

:root,
:root[data-theme='night'] {
  --bg: #000087; /* Normal bg */
  --bg-glass: rgba(0, 0, 135, 0.96);
  --panel: #0c0c9c; /* cards, a step lighter than the page */
  --panel-hover: #1414a8;
  --img-bg: #00005f;
  --line: rgba(95, 255, 255, 0.22); /* cyan, faint */
  --heading: #ffd700; /* Normal fg */
  --accent: #5fffff; /* String */
  --text: #ecebf5;
  --muted: #b4b6d8;

  color-scheme: dark;
}

:root[data-theme='day'] {
  --bg: #faf8f1;
  --bg-glass: rgba(250, 248, 241, 0.96);
  --panel: #ffffff;
  --panel-hover: #fffbe3;
  --img-bg: #ece9df;
  --line: rgba(0, 0, 135, 0.16);
  --heading: #000087;
  --accent: #0057b8;
  --text: #1b1b3a;
  --muted: #55576e;

  color-scheme: light;
}

:root {
  /* the same in both: gold highlight with navy on it */
  --highlight: #ffd700;
  --on-highlight: #000087;

  --mono: 'IBM Plex Mono', 'BlexMono Nerd Font Mono', ui-monospace, Menlo, monospace;
  --sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

/* ---------- base ---------- */

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

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

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

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

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

/* ---------- night/day toggle ---------- */

.theme-toggle {
  padding: 2px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
  cursor: pointer;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--text);
}