:root {
  color-scheme: dark;
  --bg: #0f1820;
  --panel: #172631;
  --panel2: #1d303d;
  --text: #f4f7f9;
  --muted: #bdcbd4;
  --accent: #ffbe2e;
  --accent2: #4bc0e8;
  --ok: #71d38a;
  --warn: #ffd26a;
  --border: #405563;
  --max: 1080px;
}
* { box-sizing: border-box; }
html { font-size: 18px; scroll-behavior: smooth; }
body {
  margin: 0;
  background: linear-gradient(180deg, #0c141b, var(--bg) 240px);
  color: var(--text);
  font-family: "Segoe UI", Arial, sans-serif;
  line-height: 1.62;
}
a { color: #8ddcff; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 20, 27, .96);
}
.header-inner, main, footer { width: min(calc(100% - 32px), var(--max)); margin: 0 auto; }
.header-inner { display: flex; align-items: center; gap: 18px; padding: 22px 0; }
.brand-logos {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}
.hbb-logo {
  width: 53px;
  height: 72px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, .28));
}
.manual-logo { width: 72px; height: 72px; object-fit: contain; }
h1 { margin: 0; font-size: clamp(1.7rem, 4vw, 2.45rem); line-height: 1.15; }
.subtitle { margin: 5px 0 0; color: var(--muted); }
nav { border-bottom: 1px solid var(--border); background: #13212b; }
.nav-inner { width: min(calc(100% - 32px), var(--max)); margin: 0 auto; display: flex; gap: 10px; flex-wrap: wrap; padding: 10px 0; }
.nav-inner a { color: var(--text); text-decoration: none; padding: 7px 11px; border: 1px solid transparent; border-radius: 7px; }
.nav-inner a:hover { border-color: var(--accent2); background: #19303e; }
main { padding: 30px 0 56px; }
.hero, .card, .notice, section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.hero { padding: 24px; margin-bottom: 24px; }
.hero p:last-child { margin-bottom: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.card { display: block; padding: 21px; color: var(--text); text-decoration: none; transition: transform .12s ease, border-color .12s ease; }
.card:hover { transform: translateY(-2px); border-color: var(--accent2); }
.card h2 { margin: 0 0 8px; font-size: 1.2rem; color: var(--accent); }
.card p { margin: 0; color: var(--muted); }
section { padding: 24px; margin: 0 0 18px; }
section h2 { color: var(--accent); margin-top: 0; line-height: 1.25; }
section h3 { color: #b7e9ff; margin-top: 1.4em; }
.notice { padding: 16px 18px; margin: 20px 0; border-left: 5px solid var(--accent); }
.notice.ok { border-left-color: var(--ok); }
.notice.warn { border-left-color: var(--warn); }
.step { border-left: 4px solid var(--accent2); padding-left: 16px; margin: 18px 0; }
ul, ol { padding-left: 1.35em; }
li + li { margin-top: .42em; }
code, kbd { font-family: Consolas, monospace; background: #0b141a; border: 1px solid #344957; border-radius: 5px; padding: 2px 6px; color: #e8f8ff; }
.path { display: block; overflow-wrap: anywhere; padding: 12px; margin: 10px 0; background: #0b141a; border: 1px solid #344957; border-radius: 8px; font-family: Consolas, monospace; }
.back { display: inline-block; margin-bottom: 18px; font-weight: 700; text-decoration: none; }
.small { color: var(--muted); font-size: .92rem; }
footer { color: var(--muted); border-top: 1px solid var(--border); padding: 22px 0 34px; font-size: .9rem; }
@media (max-width: 600px) {
  html { font-size: 17px; }
  .header-inner { align-items: flex-start; }
  .brand-logos { gap: 7px; }
  .hbb-logo { width: 43px; height: 58px; }
  .manual-logo { width: 58px; height: 58px; }
  section, .hero { padding: 19px; }
}
@media print {
  :root { color-scheme: light; }
  body { background: white; color: black; }
  nav, .back { display: none; }
  header, section, .hero, .card, .notice { background: white; color: black; border-color: #888; }
  .subtitle, .small, .card p { color: #333; }
  section h2, .card h2 { color: #000; }
}


.site-home-link {
  margin-left: auto;
  color: var(--accent) !important;
  border-color: rgba(255, 190, 46, .42) !important;
  font-weight: 700;
}

.site-home-link:hover,
.site-home-link:focus {
  color: #111820 !important;
  background: var(--accent) !important;
  border-color: var(--accent) !important;
}

@media (max-width: 720px) {
  .site-home-link {
    margin-left: 0;
  }
}