:root {
  color-scheme: light;
  --bg: #f4f7fc;
  --panel: #fff;
  --panel-2: #edf3fb;
  --text: #172033;
  --muted: #59677d;
  --line: #cbd6e6;
  --accent: #176fd1;
  --accent-text: #fff;
  --success: #16865b;
  --shadow: #2342;
  --hero-glow: #cfe4ff;
  --link-hover: #084f9e;
  --open-hover: #0759b2;
  --footer: #e8eef7;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0d1421;
    --panel: #172132;
    --panel-2: #1d2a3e;
    --text: #f5f8ff;
    --muted: #b4c0d3;
    --line: #34445f;
    --accent: #68a9ff;
    --accent-text: #071325;
    --success: #63d5a1;
    --shadow: #0006;
    --hero-glow: #16335c;
    --link-hover: #a8d0ff;
    --open-hover: #8fc0ff;
    --footer: #0a101a;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d1421;
  --panel: #172132;
  --panel-2: #1d2a3e;
  --text: #f5f8ff;
  --muted: #b4c0d3;
  --line: #34445f;
  --accent: #68a9ff;
  --accent-text: #071325;
  --success: #63d5a1;
  --shadow: #0006;
  --hero-glow: #16335c;
  --link-hover: #a8d0ff;
  --open-hover: #8fc0ff;
  --footer: #0a101a;
}

:root[data-theme="light"] { color-scheme: light; }
body { background: radial-gradient(circle at 75% 0, var(--hero-glow) 0, transparent 34rem), var(--bg); }
a:hover { color: var(--link-hover); }
.site-header nav .open-editor:hover,
.button.primary:hover { color: var(--accent-text); background: var(--open-hover); }
footer { background: var(--footer); }

.theme-toggle,
.language-menu summary {
  display: grid;
  min-width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: var(--panel);
  font: inherit;
  font-size: .82rem;
  font-weight: 850;
  cursor: pointer;
}

.theme-toggle:hover,
.language-menu summary:hover { border-color: var(--accent); background: var(--panel-2); }
.theme-toggle { padding: 0 10px; }
.theme-toggle span { font-size: 1.1rem; line-height: 1; }
.language-menu { position: relative; }
.language-menu summary { padding: 0 10px; list-style: none; }
.language-menu summary::-webkit-details-marker { display: none; }
.language-menu > div {
  position: absolute;
  z-index: 20;
  top: 44px;
  right: 0;
  display: grid;
  min-width: 150px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: 0 14px 38px var(--shadow);
}
.site-header .language-menu > div a { justify-content: flex-start; }
.site-header .language-menu > div a[aria-current="true"] { color: var(--text); background: var(--panel-2); }

@media print {
  .site-header, .theme-toggle, .language-menu, footer, .cta-row, .callout { display: none !important; }
  :root, :root[data-theme="dark"] {
    color-scheme: light;
    --bg: #fff;
    --panel: #fff;
    --panel-2: #fff;
    --text: #111;
    --muted: #333;
    --line: #bbb;
    --shadow: transparent;
  }
  body { background: #fff; }
  main { width: 100%; padding: 0; }
  .manual-section, .card, .step, .hero-card { break-inside: avoid; box-shadow: none; }
}