/* Header, Footer, Navigation - Design-System Anhang B (exakt) */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  backdrop-filter: blur(12px);
  background: rgba(11, 14, 20, 0.82);
  border-bottom: 1px solid var(--line);
}
.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  font-size: 0.92rem;
  color: var(--text-bright);
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
}
.brand:hover { text-decoration: none; }
.brand__prompt { color: var(--green); }
.brand__sep, .brand__dollar { color: var(--muted); }
.brand__path { color: var(--cyan); }
.brand__cursor {
  width: 8px;
  height: 1.05em;
  margin-left: 5px;
  background: var(--amber);
  align-self: center;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.menu {
  display: flex;
  align-items: center;
  gap: 26px;
}
.menu a {
  color: var(--text);
  font-size: 0.95rem;
  position: relative;
}
.menu a:hover { color: var(--text-bright); text-decoration: none; }
.menu a:not(.lang)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}
.menu a:not(.lang):hover::after { transform: scaleX(1); }

.lang { color: var(--amber) !important; font-size: 0.85rem; }
.lang__bracket { color: var(--muted); }
.lang:hover .lang__bracket { color: var(--amber); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-bright);
  border-radius: 8px;
  width: 42px; height: 38px;
  cursor: pointer;
  position: relative;
}
.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 10px; right: 10px;
  height: 2px;
  background: var(--text);
  transition: transform 0.2s;
}
.nav-toggle__bar { top: 50%; }
.nav-toggle__bar::before { top: -6px; left: 0; right: 0; }
.nav-toggle__bar::after { top: 6px; left: 0; right: 0; }

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 40;
}

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .menu {
    position: fixed;
    top: 0; right: 0;
    height: 100dvh;
    width: min(300px, 82vw);
    flex-direction: column;
    align-items: flex-start;
    padding: 90px 28px;
    gap: 22px;
    background: var(--surface);
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    transition: transform 0.25s ease;
    z-index: 45;
  }
  .menu[data-open] { transform: none; }
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  margin-top: 40px;
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.82rem;
}
.footer__copy { color: var(--muted); }
.footer__links { display: flex; gap: 22px; }
.footer__links a { color: var(--muted); }
.footer__links a:hover { color: var(--amber); text-decoration: none; }