:root {
  color-scheme: light;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #555555;
  --accent: #0072b5;
  --accent-fg: #ffffff;
  --border: #d6d6d6;
  --surface: #f3f5f7;
  --focus: #b35c00;
  /* Der Schriftzug "RACING ELECTRIC" im Logo ist schwarz; auf dunklem Grund braucht er eine helle Fläche. */
  --logo-plate: transparent;
}

/* Ohne gespeicherte Wahl folgt die Seite dem System; data-theme (theme.js) überschreibt das in beide Richtungen. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #121416;
    --fg: #e8e8e8;
    --muted: #a8adb3;
    --accent: #4db4f0;
    --accent-fg: #0b0d0f;
    --border: #3a3f45;
    --surface: #1d2125;
    --focus: #ffb454;
    --logo-plate: #ffffff;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #121416;
  --fg: #e8e8e8;
  --muted: #a8adb3;
  --accent: #4db4f0;
  --accent-fg: #0b0d0f;
  --border: #3a3f45;
  --surface: #1d2125;
  --focus: #ffb454;
  --logo-plate: #ffffff;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}

.wrap {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 1rem;
}

a {
  color: var(--accent);
  text-underline-offset: 0.15em;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 10;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* Header */

.site-header {
  padding-block: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: block;
  width: min(100%, 38rem);
  height: auto;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  background: var(--logo-plate);
}


.lang-toggle ul {
  display: flex;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-weight: 600;
}

.lang-toggle li + li::before {
  content: "|";
  margin-right: 0.25rem;
  color: var(--muted);
}

.lang-toggle a {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  color: var(--fg);
  text-decoration: none;
}

.lang-toggle a:hover {
  text-decoration: underline;
}

.lang-toggle a[aria-current="page"] {
  background: var(--accent);
  color: var(--accent-fg);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--fg);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.theme-toggle:hover {
  background: var(--surface);
}

.theme-toggle svg {
  width: 1.1em;
  height: 1.1em;
}

/* Symbol zeigt das Ziel des Klicks: Mond im hellen, Sonne im dunklen Design. */
.theme-toggle .icon-sun,
:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: inline;
}

.theme-toggle[hidden] {
  display: none;
}

h1 {
  margin: 1.5rem 0 0.25rem;
  font-size: 2rem;
  line-height: 1.2;
}

.version {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.download {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 700;
  text-decoration: none;
}

.download:hover {
  filter: brightness(1.1);
  text-decoration: underline;
}

.download small {
  font-weight: 400;
}

/* Content */

main {
  padding-block: 1rem 2rem;
}

h2 {
  margin: 2.25rem 0 0.75rem;
  font-size: 1.4rem;
  line-height: 1.3;
}

main ol {
  padding-left: 2rem;
}

main ol ol {
  margin: 0.5rem 0;
}

main li {
  margin-bottom: 0.5rem;
}

main li li {
  margin-bottom: 0.25rem;
}

.note {
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--accent);
  background: var(--surface);
  font-size: 0.95rem;
}

/* Previous versions */

.previous {
  padding-block: 1.5rem 2.5rem;
  border-top: 1px solid var(--border);
}

.previous h2 {
  margin-top: 0;
}

.previous ul {
  padding-left: 1.25rem;
}

.previous li {
  margin-bottom: 0.4rem;
}

.site-footer {
  padding-block: 1rem 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Print */

@media print {
  /* Druck immer hell, auch wenn am Bildschirm Dark Mode aktiv ist. */
  :root,
  :root[data-theme],
  :root:not([data-theme="light"]) {
    color-scheme: light;
    --bg: #ffffff;
    --fg: #000000;
    --muted: #333333;
    --accent: #0072b5;
    --border: #d6d6d6;
    --surface: #f3f5f7;
    --logo-plate: transparent;
  }

  body {
    font-size: 11pt;
  }

  .wrap {
    max-width: none;
    padding: 0;
  }

  .skip-link,
  .lang-toggle,
  .theme-toggle,
  .download,
  .previous,
  .site-footer {
    display: none !important;
  }

  .logo {
    background: none;
    padding: 0;
  }

  .site-header {
    border: 0;
  }

  h2 {
    break-after: avoid;
  }

  li {
    break-inside: avoid;
  }

  a {
    color: inherit;
    text-decoration: none;
  }
}