/* Minimal, high‑contrast, accessible styles */
:root {
  --bg: #0b0b0b;
  --text: #f5f7fa;
  --muted: #aab4c0;
  --accent: #6ee7ff;
  --card: #15181b;
  --button: #1f6feb;
  --button-text: #ffffff;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, sans-serif; line-height: 1.5; }

.container { width: min(980px, 92vw); margin: 0 auto; }
.site-header { border-bottom: 1px solid #222; background: #0f1114; }
.header-inner { padding: 1.25rem 0; }
#site-title { margin: 0; font-size: 1.75rem; }
#tagline { margin: .25rem 0 0; color: var(--muted); }

.nav ul { list-style: none; padding: 0; margin: .75rem 0 0; display: flex; flex-wrap: wrap; gap: .75rem; }
.nav a { color: var(--accent); text-decoration: none; border-bottom: 1px dotted transparent; }
.nav a:focus, .nav a:hover { border-bottom-color: var(--accent); outline: none; }

.skip-link {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: static; width: auto; height: auto; padding: .5rem .75rem; background: #222; color: #fff;
}

.card { background: var(--card); padding: 1.25rem; margin: 1rem 0; border: 1px solid #222; border-radius: .75rem; }
.card h2 { margin-top: 0; }

.bullets { margin: .5rem 0 0 1.25rem; }
.bullets li { margin: .25rem 0; }

.button {
  display: inline-block;
  padding: .7rem 1rem;
  background: var(--button);
  color: var(--button-text);
  border-radius: .6rem;
  text-decoration: none;
  font-weight: 600;
}
.button:focus, .button:hover { filter: brightness(1.1); }

.button-row { display: flex; gap: .75rem; flex-wrap: wrap; }

.dim { color: var(--muted); }
.note { margin-top: .5rem; color: var(--muted); font-size: .95rem; }

.site-footer { padding: 1rem 0 2rem; color: var(--muted); border-top: 1px solid #222; margin-top: 2rem; }