/* ============================================================
   SITE.CSS — Nav, footer, section scaffolding, print base
   Requires branding.css to be loaded first.
   ============================================================ */

/* -------- Nav -------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--rule);
}

.site-nav .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

/* Logo / mark */
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 13px;
  color: var(--ink);
  letter-spacing: 0.06em;
  text-decoration: none;
}

.nav-logo:hover { color: var(--ink); }

.led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  box-shadow: 0 0 0 0 color-mix(in oklab, var(--accent) 60%, transparent);
  animation: pulse 2.2s cubic-bezier(.4,0,.6,1) infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0   color-mix(in oklab, var(--accent) 55%, transparent); }
  70%  { box-shadow: 0 0 0 8px color-mix(in oklab, var(--accent)  0%, transparent); }
  100% { box-shadow: 0 0 0 0   color-mix(in oklab, var(--accent)  0%, transparent); }
}

@media (prefers-reduced-motion: reduce) {
  .led { animation: none; }
}

/* Nav links */
.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-links a {
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color 0.15s, transform 0.15s;
}

.nav-links a:hover {
  color: var(--accent);
  transform: translateY(-1px);
}

.nav-links a.active { color: var(--accent); }

/* Nav controls (right side) */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--ink-3);
  font-size: 14px;
  padding: 0;
  display: flex;
  align-items: center;
  transition: color 0.15s;
  line-height: 1;
}

.theme-toggle:hover { color: var(--accent); }

/* Language toggle */
.lang-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.lang-toggle:hover { color: var(--ink); }

.lang-toggle .lang-opt { transition: color 0.15s; }
.lang-toggle .lang-opt.active { color: var(--ink); font-weight: 500; }

/* Hamburger button */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 22px;
  height: 16px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
  border-radius: 1px;
  transition: all 0.2s;
}

.nav-hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav */
@media (max-width: 720px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--rule);
    padding: var(--space-sm) 0;
    z-index: 39;
  }

  .nav-links.open { display: flex; }

  .nav-links a {
    padding: 12px var(--pad-x);
    font-size: 15px;
    border-bottom: 1px solid color-mix(in oklab, var(--rule) 50%, transparent);
    width: 100%;
  }

  .nav-links a:last-child { border-bottom: none; }

  .nav-hamburger { display: flex; }
}

/* -------- Section scaffolding -------- */
section {
  padding: clamp(56px, 8vw, 112px) 0;
}

.sec-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
  border-top: 1px solid var(--rule);
  padding-top: 16px;
}

.sec-head h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(26px, 3.4vw, 42px);
  margin: 0;
  letter-spacing: -0.01em;
}

.sec-head .coord { color: var(--ink-3); }

/* -------- Footer -------- */
.site-footer {
  background: var(--deep-slate);
  color: var(--warm-white);
  padding: clamp(48px, 7vw, 88px) 0 32px;
  margin-top: 40px;
}

[data-theme="dark"] .site-footer { background: #0A1219; }

.site-footer .wrap {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
}

@media (max-width: 780px) {
  .site-footer .wrap { grid-template-columns: 1fr; gap: 32px; }
}

.site-footer h3 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted-steel);
  text-transform: uppercase;
  margin: 0 0 14px;
  font-weight: 500;
}

.site-footer h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(26px, 3.4vw, 44px);
  margin: 0 0 12px;
  letter-spacing: -0.01em;
  max-width: 14ch;
}

.site-footer a { color: var(--alpine-teal); }
.site-footer a:hover { color: var(--warm-white); }

.site-footer .lbl {
  color: var(--muted-steel);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.site-footer ul li { font-size: 14px; }

.footer-bottom {
  grid-column: 1 / -1;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid color-mix(in oklab, var(--muted-steel) 30%, transparent);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted-steel);
  letter-spacing: 0.08em;
}

.footer-bottom a { color: var(--muted-steel); }
.footer-bottom a:hover { color: var(--warm-white); }

/* Impressum collapsible in footer */
.impressum-toggle {
  background: none;
  border: 1px solid color-mix(in oklab, var(--muted-steel) 40%, transparent);
  color: var(--muted-steel);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  cursor: pointer;
  border-radius: var(--radius);
}

.impressum-toggle:hover { border-color: var(--muted-steel); color: var(--warm-white); }

.impressum-content {
  display: none;
  margin-top: 16px;
  font-size: 12px;
  color: var(--muted-steel);
  line-height: 1.6;
}

.impressum-content.open { display: block; }
.impressum-content a { color: var(--muted-steel); }
.impressum-content address { font-style: normal; }

/* -------- Print base -------- */
@media print {
  @page { size: A4; margin: 14mm; }

  html, body {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  body { font-size: 11pt; line-height: 1.5; }

  .site-nav { position: static !important; backdrop-filter: none !important; }
  .site-footer { margin-top: 24px !important; padding: 24px 0 !important; }
  .nav-hamburger, .nav-controls { display: none !important; }

  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }

  a { color: var(--accent) !important; text-decoration: none; }
  a[href^="http"]::after { content: ""; }
}