:root {
  --text: #1a1a1a;
  --bg: #fdfdfc;
  --accent: #0a66c2;
  --muted: #666;
  --border: #e4e4e1;
  --code-bg: #f2f2ef;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e6e6e2;
    --bg: #14151a;
    --accent: #58a6ff;
    --muted: #9a9a94;
    --border: #2a2c33;
    --code-bg: #1e2027;
  }
}

* { box-sizing: border-box; }

html {
  /* Verhindert Layout-Sprung (CLS) zwischen Seiten mit und ohne Scrollbalken:
     der Platz für den Scrollbalken wird dauerhaft reserviert */
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
}

header > a.brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}

header nav a {
  margin-left: 1.25rem;
  color: var(--muted);
  text-decoration: none;
}

header nav a:hover { color: var(--accent); }

.langswitch {
  margin-left: 1.5rem;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border);
}

.langswitch a { margin-left: .75rem; font-size: .9rem; }

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 2rem;
}

footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 1rem 2rem 2rem;
  color: var(--muted);
  font-size: .85rem;
}

h1 { line-height: 1.2; font-size: clamp(1.8rem, 5vw, 2.6rem); }

.intro {
  font-size: 1.25rem;
  color: var(--muted);
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
}

.text code, dd code, dt code {
  background: var(--code-bg);
  padding: .1em .35em;
  border-radius: 4px;
  font-size: .92em;
}

dl.items dt {
  margin-top: 1.4rem;
  font-weight: 700;
}

dl.items dt a { font-weight: 400; font-size: .9em; }

dl.items dd {
  margin: .25rem 0 0 0;
  color: var(--muted);
}

a { color: var(--accent); }

.livestatus {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: .75rem 1rem;
  margin: 1.5rem 0;
  background: var(--code-bg);
}

.livestatus h2 { margin: 0 0 .25rem 0; font-size: .95rem; }
.livestatus p { margin: 0; font-size: .9rem; color: var(--muted); }

.vform fieldset {
  border: 1px solid var(--border);
  border-radius: 6px;
  margin: 1rem 0;
  padding: .75rem 1rem;
}

.vform legend { font-weight: 700; padding: 0 .5rem; }

.vform label {
  display: block;
  margin: .5rem 0;
  font-size: .9rem;
  color: var(--muted);
}

.vform input, .vform select, .vform textarea {
  display: block;
  width: 100%;
  margin-top: .25rem;
  padding: .5rem;
  font: .85rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.vform button {
  display: inline-block;
  margin: .5rem .5rem 0 0;
  padding: .6rem 1.2rem;
  font: 600 .95rem system-ui, sans-serif;
  color: var(--bg);
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}

.vform button:last-child { background: transparent; color: var(--accent); border: 1px solid var(--accent); }

.vresult {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 1rem;
  margin: 1.5rem 0;
  background: var(--code-bg);
}

.vresult .step { font-size: .88rem; margin: .35rem 0; word-break: break-all; }
.vresult pre {
  background: var(--bg);
  padding: .6rem;
  border-radius: 4px;
  overflow-x: auto;
  font-size: .8rem;
  border: 1px solid var(--border);
}

.vresult .verdict { font-weight: 700; font-size: 1.05rem; margin-top: .75rem; }
.vresult .verdict.ok { color: #2f9e44; }
.vresult .verdict.fail { color: #e03131; }

@media (prefers-color-scheme: dark) {
  .vresult .verdict.ok { color: #51cf66; }
  .vresult .verdict.fail { color: #ff6b6b; }
}

.vguide { margin-top: 2rem; border-top: 1px solid var(--border); padding-top: 1rem; }