/* Charlotenburg — ultra simple, image-first (inspired by Awwwards 3D/WebGPU minimalism) */
:root{
  --bg: #141210;
  --fg: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.72);
  --muted2: rgba(255,255,255,.58);
  --line: rgba(255,255,255,.12);
  --glass: rgba(24, 20, 16, .22);
  --glass2: rgba(24, 20, 16, .30);
  --shadow: 0 18px 60px rgba(0,0,0,.35);
  --radius: 18px;
  --max: 1120px;
}

*{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  overflow-x: hidden;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: none; }

.topbar{
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  z-index: 20;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: linear-gradient(to bottom, rgba(0,0,0,.38), rgba(0,0,0,0));
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: .2px;
}
.dot{
  width: 10px; height: 10px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, #ffd59e, #a86b2b 70%, #5a3316);
  box-shadow: 0 0 0 6px rgba(255,213,158,.08);
}

.nav{
  display: none;
  gap: 18px;
  font-size: 14px;
  color: var(--muted);
}
.nav a{ padding: 8px 10px; border-radius: 999px; }
.nav a:hover{ background: rgba(255,255,255,.08); color: var(--fg); }

.lang{
  display: inline-flex;
  gap: 6px;
  padding: 6px;
  border-radius: 999px;
  background: rgba(0,0,0,.26);
  border: 1px solid var(--line);
}
.lang-btn{
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
}
.lang-btn.is-active{
  color: var(--fg);
  background: rgba(255,255,255,.12);
}

.snap{
  height: 100vh;
  overflow-y: auto;
  scroll-snap-type: y mandatory;
}

.scene{
  position: relative;
  min-height: 100vh;
  scroll-snap-align: start;
  display: grid;
  place-items: center;
  padding: 92px 18px 56px;
  background: #000;
}
.scene::before{
  content:"";
  position: absolute; inset: 0;
  background-image: var(--bg-img);
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
  filter: saturate(1.08) contrast(1.03) brightness(1.06);
}
.scene::after{
  /* subtle grain */
  content:"";
  position:absolute; inset:-30%;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,.08), transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(255,200,140,.06), transparent 55%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
  opacity: .18;
  pointer-events: none;
  transform: rotate(3deg);
}

.overlay{
  position:absolute; inset:0;
  background:
    radial-gradient(1200px 600px at 35% 35%, rgba(0,0,0,.20), rgba(0,0,0,.58)),
    linear-gradient(to bottom, rgba(0,0,0,.25), rgba(0,0,0,.58));
}
.overlay.strong{
  background:
    radial-gradient(1200px 600px at 35% 25%, rgba(0,0,0,.35), rgba(0,0,0,.66)),
    linear-gradient(to bottom, rgba(0,0,0,.35), rgba(0,0,0,.58));
}

.content{
  position: relative;
  width: min(var(--max), 100%);
  padding: 22px 0;
  text-align: left;
}
.content.compact{ width: min(880px, 100%); }

.eyebrow{
  margin: 0 0 10px 0;
  color: var(--muted);
  font-size: 14px;
  letter-spacing: .18em;
  text-transform: uppercase;
}

h1{
  margin: 0;
  font-weight: 600;
  font-size: clamp(34px, 5vw, 66px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-shadow: 0 12px 50px rgba(0,0,0,.35);
}
.lead{
  margin: 14px 0 0;
  max-width: 60ch;
  color: var(--muted);
  font-size: clamp(16px, 1.6vw, 20px);
  line-height: 1.55;
}

h2{
  margin: 0 0 14px;
  font-weight: 600;
  font-size: clamp(22px, 2.6vw, 34px);
  letter-spacing: -0.02em;
}

.cta{
  margin-top: 22px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.btn{
  appearance: none;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(0,0,0,.30);
  color: var(--fg);
  padding: 12px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 40px rgba(0,0,0,.20);
}
.btn:hover{ background: rgba(255,255,255,.10); }
.btn.ghost{ background: rgba(0,0,0,.18); color: var(--muted); }
.btn.ghost:hover{ color: var(--fg); }

.facts{
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.facts li{
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 12px;
  padding: 14px 14px;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.k{
  color: var(--muted2);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .12em;
}
.v{
  color: var(--fg);
  font-size: 15px;
  line-height: 1.5;
}

.links{ margin-top: 12px; }
.mini{
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(0,0,0,.22);
  border: 1px solid var(--line);
}
.mini:hover{ color: var(--fg); background: rgba(255,255,255,.09); }

.muted{ color: var(--muted); }
.tiny{ margin-top: 18px; font-size: 12px; color: var(--muted2); }

.credit-cards{
  margin-top: 14px;
  display: grid;
  gap: 10px;
}
.card{
  padding: 14px 14px;
  border-radius: var(--radius);
  background: var(--glass2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.card h3{ margin: 0 0 8px; font-size: 15px; font-weight: 600; }
.card p{ margin: 0; font-size: 13px; line-height: 1.5; }

.hint{
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--muted2);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.mouse{
  width: 18px; height: 26px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.28);
  position: relative;
}
.mouse::after{
  content:"";
  position: absolute;
  left: 50%; top: 6px;
  width: 3px; height: 6px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: rgba(255,255,255,.45);
  animation: wheel 1.6s infinite ease-in-out;
}
@keyframes wheel{
  0%{ transform: translate(-50%, 0); opacity: .3; }
  45%{ opacity: 1; }
  100%{ transform: translate(-50%, 10px); opacity: .1; }
}

.ui-hidden .content,
.ui-hidden .hint,
.ui-hidden .topbar .nav{
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity .25s ease, transform .25s ease;
}
.content, .hint{ transition: opacity .25s ease, transform .25s ease; }

@media (min-width: 860px){
  .nav{ display: inline-flex; }
  .topbar{ padding: 16px 26px; }
  .scene{ padding: 110px 26px 56px; }
}