:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #273449;
  --text: #f1f5f9;
  --text-dim: #94a3b8;
  --accent: #38bdf8;
  --accent-ink: #082f49;
  --danger: #ef4444;
  --success: #22c55e;
  --border: #334155;
  --radius: 16px;
  --maxw: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation: none !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

.skip {
  position: absolute;
  left: -999px;
}
.skip:focus {
  left: 12px;
  top: 12px;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 10;
}

/* Kopfzeile */
header.top {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
header.top .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}
.brand img {
  width: 30px;
  height: 30px;
}
nav.links {
  display: flex;
  align-items: center;
  gap: 22px;
}
nav.links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.95rem;
}
nav.links a:hover {
  color: var(--text);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 650;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
}
.btn:hover {
  background: var(--surface-2);
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn.primary:hover {
  background: #7dd3fc;
}
.btn.small {
  padding: 8px 16px;
  font-size: 0.9rem;
}
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

/* Hero */
.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(900px 400px at 80% 0%, rgba(56, 189, 248, 0.14), transparent 60%), var(--bg);
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.eyebrow {
  color: var(--accent);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
}
h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.1;
  margin: 12px 0 18px;
}
h1 em {
  font-style: normal;
  color: var(--accent);
}
.lead {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 34em;
}
.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.badges li {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.radar {
  width: 100%;
  height: auto;
  max-width: 440px;
  justify-self: center;
}
.pulse {
  transform-origin: 220px 220px;
  animation: pulse 3.2s ease-out infinite;
}
.pulse.p2 {
  animation-delay: 1.6s;
}
@keyframes pulse {
  from {
    transform: scale(0.15);
    opacity: 0.8;
  }
  to {
    transform: scale(1);
    opacity: 0;
  }
}

/* Abschnitte */
section {
  padding: 72px 0;
}
section.alt {
  background: var(--surface);
  border-block: 1px solid var(--border);
}
h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  line-height: 1.2;
  margin: 0 0 12px;
}
.sub {
  color: var(--text-dim);
  max-width: 40em;
  margin: 0 0 40px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: s;
}
.steps li {
  counter-increment: s;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.steps li::before {
  content: counter(s);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
  margin-bottom: 14px;
}
.steps h3,
.card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}
.steps p,
.card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
section.alt .card {
  background: var(--bg);
}
.card .ico {
  width: 40px;
  height: 40px;
  color: var(--accent);
  margin-bottom: 12px;
}

.roles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.role {
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.role h3 {
  margin: 0 0 8px;
  font-size: 1.3rem;
}
.role.x {
  border-color: rgba(239, 68, 68, 0.5);
}
.role.x h3 {
  color: var(--danger);
}
.role.d {
  border-color: rgba(56, 189, 248, 0.5);
}
.role.d h3 {
  color: var(--accent);
}
.role ul {
  margin: 12px 0 0;
  padding-left: 1.1em;
  color: var(--text-dim);
}

.privacy {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 32px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.privacy li {
  padding-left: 30px;
  position: relative;
  color: var(--text-dim);
}
.privacy li strong {
  color: var(--text);
}
.privacy li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 7px;
  width: 14px;
  height: 8px;
  border-left: 3px solid var(--success);
  border-bottom: 3px solid var(--success);
  transform: rotate(-45deg);
}

.final {
  text-align: center;
  background:
    radial-gradient(700px 300px at 50% 100%, rgba(56, 189, 248, 0.16), transparent 70%), var(--bg);
}
.final .sub {
  margin-inline: auto;
}
.final .cta {
  justify-content: center;
}

footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}
footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
}
footer a {
  color: var(--text-dim);
}
footer a:hover {
  color: var(--text);
}
footer .fl {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

@media (max-width: 860px) {
  .hero .wrap,
  .roles {
    grid-template-columns: 1fr;
  }
  .hero {
    padding-top: 40px;
  }
  .steps {
    grid-template-columns: 1fr 1fr;
  }
  .grid {
    grid-template-columns: 1fr 1fr;
  }
  nav.links a:not(.btn) {
    display: none;
  }
}
@media (max-width: 560px) {
  .steps,
  .grid,
  .privacy {
    grid-template-columns: 1fr;
  }
  section {
    padding: 52px 0;
  }
}