/* =====================================================================
   Design System — Shared Styles
   Denis Ludwig · Drei Räume · V3
   Enthält: Reset, Nav, Burger, Mobile Menu, Reveal, Buttons,
            Page-Content/Footer, Sitefoot, Marquee
   ===================================================================== */

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; padding: 0;
  font-family: var(--font-sans);
  font-size: var(--t-base);
  line-height: var(--lh-base);
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.3s, color 0.3s;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
h1,h2,h3,h4,h5,h6 { margin: 0; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

/* ---- STICKY FROSTED GLASS NAV ---- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  padding: 14px var(--gutter);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  background: rgba(var(--nav-bg-rgb), 0.72);
  border-bottom: 1px solid var(--line-c);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  transition: background 0.4s, border-color 0.3s;
}
.site-nav.scrolled {
  background: rgba(var(--nav-bg-rgb), 0.93);
}
.site-nav__brand {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  font-weight: 500;
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}
.d-dot {
  width: 7px; height: 7px; border-radius: 50%;
  flex-shrink: 0;
  display: inline-block;
}
.site-nav__domains { display: flex; align-items: center; gap: var(--s-5); }
.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}
.site-nav__links a {
  text-decoration: none;
  color: var(--fg-mute);
  transition: color var(--d-fast);
}
.site-nav__links a:hover { color: var(--fg); }
.site-nav__links a.active { color: var(--accent); }
.nav-domain {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: var(--fg-mute);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  transition: color var(--d-fast);
}
.nav-domain:hover { color: var(--fg); }
.theme-toggle {
  background: none;
  border: 1px solid var(--line-c-strong);
  border-radius: var(--r-pill);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--fg-mute);
  padding: 5px 12px;
  display: inline-flex; align-items: center; gap: 6px;
  transition: color var(--d-fast), border-color var(--d-fast);
  line-height: 1.2;
}
.theme-toggle:hover { color: var(--fg); border-color: var(--fg-mute); }
.site-nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--line-c-strong);
  color: var(--fg);
  text-decoration: none;
  transition: background var(--d-fast), border-color var(--d-fast);
}
.site-nav__cta:hover { background: rgba(255,255,255,0.07); border-color: var(--fg-mute); }
[data-theme="light"] .site-nav__cta:hover { background: rgba(0,0,0,0.05); }

/* ---- BURGER ---- */
.burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-direction: column;
  gap: 5px;
}
.burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--fg);
  transition: transform 0.3s, opacity 0.3s;
  transform-origin: center;
}
.burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---- MOBILE MENU ---- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 190;
  background: var(--bg);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--s-6);
  opacity: 0;
  transition: opacity 0.3s;
}
.mobile-menu.open { opacity: 1; }
.mobile-menu a {
  font-family: var(--font-serif);
  font-size: var(--t-2xl);
  font-weight: 300;
  letter-spacing: var(--ls-snug);
  text-decoration: none;
  color: var(--fg-mute);
  transition: color var(--d-fast);
}
.mobile-menu a:hover { color: var(--accent); }
.mobile-menu .menu-cta {
  margin-top: var(--s-5);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 12px 28px;
  text-decoration: none;
}

/* ---- FOOTER SPACER ---- */
/* ---- SCROLL REVEAL ---- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal.is-visible,
.reveal.visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.18s; }
.reveal-d3 { transition-delay: 0.3s; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: var(--t-sm);
  letter-spacing: var(--ls-snug);
  border: 1px solid currentColor;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--d-fast), color var(--d-fast), transform var(--d-fast), box-shadow var(--d-fast);
}
.btn--primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.btn--primary:hover { transform: translate(-2px,-2px); box-shadow: 4px 4px 0 var(--fg); }
.btn--ghost { color: var(--fg); }
.btn--ghost:hover { background: var(--fg); color: var(--bg); }
.btn svg { width: 16px; height: 16px; }

/* ---- PAGE-CONTENT / CTA-ZONE / FOOTER-ZONE ---- */
.page-content {
  position: relative;
  z-index: 2;
  background: var(--bg);
}
.footer-zone {
  position: relative;
  z-index: 1;
  background: var(--bg-2);
}
.cta-zone {
  position: relative;
  z-index: 0;
  background: var(--bg-2);
}
.footer-reveal {
  position: sticky;
  bottom: 0;
  z-index: 0;
}

/* ---- SITEFOOT ---- */
.sitefoot {
  padding: var(--s-9) var(--gutter) var(--s-6);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--s-7);
  border-top: 1px solid var(--line-c);
}
.sitefoot__col h4 {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--fg-mute);
  font-weight: 500;
  margin: 0 0 var(--s-3);
}
.sitefoot__col li { margin-bottom: 6px; }
.sitefoot__col a { text-decoration: none; transition: color var(--d-fast); }
.sitefoot__col a:hover { color: var(--accent); }
.sitefoot__legal {
  grid-column: 1 / -1;
  margin-top: var(--s-7);
  padding-top: var(--s-5);
  border-top: 1px solid var(--line-c);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--fg-mute);
}

/* ---- MARQUEE ---- */
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.marquee {
  overflow: hidden;
  white-space: nowrap;
  border-top: 1px solid var(--line-c);
  border-bottom: 1px solid var(--line-c);
  padding: 14px 0;
}
.marquee__track {
  display: inline-block;
  animation: marquee 40s linear infinite;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 300;
  font-size: var(--t-xl);
}
.marquee__track > span { padding: 0 28px; }
.marquee__track > span::before {
  content: '◇';
  color: var(--accent);
  margin-right: 28px;
  font-size: 0.7em;
  vertical-align: middle;
}

/* ---- RESPONSIVE (shared nav/footer breakpoints) ---- */
@media (max-width: 900px) {
  .nav-hide-mobile { display: none !important; }
  .site-nav__cta { display: none; }
  .burger { display: flex; }
  .footer-reveal { position: relative; }
  .sitefoot { grid-template-columns: 1fr 1fr !important; }
}
@media (max-width: 600px) {
  .sitefoot { grid-template-columns: 1fr !important; }
}