:root {
  --vk-bg: #060b17;
  --vk-surface: #0f1729;
  --vk-surface-alt: #121d34;
  --vk-border: #25324a;
  --vk-text: #e7eefc;
  --vk-muted: #9db0d4;
  --vk-accent: #6bc5ff;
  --vk-accent-2: #7f8cff;
  --vk-cta: #8ad3ff;
  --vk-cta-text: #071325;
  --vk-ok: #79d8a0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--vk-text);
  background:
    radial-gradient(1200px circle at 80% -10%, rgba(127, 140, 255, 0.18), transparent 40%),
    radial-gradient(900px circle at 10% -20%, rgba(107, 197, 255, 0.16), transparent 36%),
    var(--vk-bg);
  line-height: 1.62;
}

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

a:hover {
  color: #a8ddff;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--vk-border);
  background: rgba(6, 11, 23, 0.85);
  backdrop-filter: blur(7px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.95rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--vk-text);
  text-decoration: none;
}

.brand img {
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 6px;
  object-fit: contain;
  box-shadow: 0 0 20px rgba(107, 197, 255, 0.3);
}

.brand span {
  font-weight: 600;
  letter-spacing: 0.01em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-links a {
  text-decoration: none;
  color: var(--vk-muted);
  font-size: 0.94rem;
}

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

.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--vk-border);
  border-radius: 9px;
  overflow: hidden;
}

.lang-switch button {
  background: transparent;
  color: var(--vk-muted);
  border: 0;
  padding: 0.42rem 0.65rem;
  font-size: 0.84rem;
  cursor: pointer;
}

.lang-switch button.active {
  background: rgba(127, 140, 255, 0.2);
  color: #d9e7ff;
}

.hero {
  padding: 4.8rem 0 3.6rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.83rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #c0d3f3;
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4.7vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero p {
  max-width: 760px;
  color: var(--vk-muted);
  margin: 1.25rem 0 1.8rem;
  font-size: 1.08rem;
}

.hero-top {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  margin-bottom: 0.9rem;
}

.hero-logo {
  width: 74px;
  height: 74px;
  object-fit: contain;
  border-radius: 12px;
  border: 1px solid var(--vk-border);
  background: rgba(8, 15, 28, 0.7);
  padding: 0.35rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid transparent;
  padding: 0.78rem 1.15rem;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary {
  color: var(--vk-cta-text);
  background: linear-gradient(140deg, var(--vk-cta), #9ec9ff);
}

.btn-primary:hover {
  color: var(--vk-cta-text);
  filter: brightness(1.04);
}

.btn-secondary {
  color: var(--vk-text);
  border-color: var(--vk-border);
  background: rgba(255, 255, 255, 0.02);
}

.btn-secondary:hover {
  border-color: #3f5476;
  color: var(--vk-text);
}

.section {
  margin-bottom: 1.1rem;
}

.section-divider {
  border: 0;
  border-top: 1px solid rgba(61, 79, 110, 0.55);
  margin: 0.8rem 0 1.5rem;
}

.card {
  background: linear-gradient(180deg, rgba(18, 29, 52, 0.78), rgba(15, 23, 41, 0.9));
  border: 1px solid var(--vk-border);
  border-radius: 14px;
  padding: 1.4rem;
  margin: 0 0 1.2rem;
}

.card h2 {
  margin: 0 0 0.65rem;
  font-size: 1.25rem;
}

.card h3 {
  margin: 0.25rem 0 0.55rem;
  font-size: 1.02rem;
}

.card p {
  margin: 0.2rem 0 0.75rem;
  color: var(--vk-muted);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.list {
  margin: 0;
  padding-left: 1rem;
  color: var(--vk-muted);
}

.list li {
  margin-bottom: 0.4rem;
}

.mono-box {
  border: 1px dashed #3c4f71;
  border-radius: 12px;
  background: rgba(7, 16, 30, 0.74);
  padding: 0.95rem;
  font-family: Consolas, "JetBrains Mono", monospace;
  font-size: 0.88rem;
  color: #d5e7ff;
  overflow-x: auto;
  white-space: pre;
  line-height: 1.45;
}

.mini-note {
  display: block;
  margin-top: 0.25rem;
  color: #91a9d0;
  font-size: 0.84rem;
}

.kv-grid {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 0.45rem 1rem;
}

.kv-grid dt {
  color: #bad1f5;
  font-weight: 600;
}

.kv-grid dd {
  margin: 0;
  color: var(--vk-muted);
}

.faq details {
  border: 1px solid var(--vk-border);
  border-radius: 12px;
  padding: 0.85rem 0.95rem;
  margin-bottom: 0.75rem;
  background: rgba(15, 23, 41, 0.66);
}

.faq summary {
  font-weight: 600;
  cursor: pointer;
}

.faq p {
  margin: 0.6rem 0 0;
}

.meta-note {
  font-size: 0.86rem;
  color: #b5c6e5;
  padding: 0.65rem 0.8rem;
  border-left: 3px solid var(--vk-accent-2);
  background: rgba(127, 140, 255, 0.08);
  border-radius: 8px;
}

.footer-cta {
  margin: 1.8rem 0 2.8rem;
  padding: 1.3rem;
  border-radius: 14px;
  border: 1px solid var(--vk-border);
  background: linear-gradient(170deg, rgba(14, 24, 42, 0.96), rgba(10, 17, 29, 0.95));
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1rem;
  margin-top: 0.8rem;
}

.deep-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.site-footer {
  border-top: 1px solid var(--vk-border);
  padding: 1.2rem 0 2.2rem;
  color: #8da4ca;
  font-size: 0.9rem;
}

[data-lang] {
  display: none;
}

body[data-current-lang="de"] [data-lang="de"] {
  display: block;
}

body[data-current-lang="en"] [data-lang="en"] {
  display: block;
}

.toc {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem 1rem;
  margin-top: 0.7rem;
}

.toc a {
  color: #c7dbfb;
  text-decoration: none;
  font-size: 0.93rem;
}

.toc a:hover {
  color: #e1edff;
  text-decoration: underline;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  color: #9cb1d8;
  font-size: 0.88rem;
}

.doc-meta span {
  border: 1px solid #334564;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  background: rgba(12, 21, 37, 0.7);
}

/* VisuKey Windows: Marketing-Pitch – gleiche linke Kante wie Hero (.container) */
.vk-pitch {
  padding: 0.5rem 0 1.5rem;
}

.vk-pitch-title {
  margin: 0 0 1rem;
  font-size: clamp(1.45rem, 3.2vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--vk-text);
}

.vk-pitch-lead {
  margin: 0 0 0.85rem;
  color: var(--vk-muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

.vk-pitch-highlight {
  margin: 0 0 1.25rem;
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--vk-accent);
}

.vk-pitch-sub {
  margin: 1.15rem 0 0.5rem;
  font-size: 1.12rem;
  font-weight: 600;
  color: #d5e4ff;
}

.vk-pitch .vk-pitch-sub:first-of-type {
  margin-top: 0.35rem;
}

/* Abstand vor „Warum VisuKey besser ist“ etwas straffer als Standard-h3 */
.vk-pitch > h3.vk-pitch-sub:nth-of-type(2) {
  margin-top: 1rem;
}

.vk-pitch p:not(.vk-pitch-lead):not(.vk-pitch-highlight):not(.vk-pitch-tagline):not(.vk-pitch-callout) {
  margin: 0 0 0.65rem;
  color: var(--vk-muted);
}

.vk-pitch-callout {
  margin: 0.5rem 0 0.65rem;
  font-size: 1.08rem;
  color: var(--vk-text);
}

.vk-pitch-tagline {
  margin: 0 0 1rem;
  font-weight: 600;
  color: var(--vk-ok);
  font-size: 1.02rem;
}

/* 3 Spalten: drei Karten in einer Zeile, danach volle Breite – keine leere Zelle */
.vk-benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem 1rem;
  margin: 0.35rem 0 0.85rem;
}

.vk-benefit-card {
  background: linear-gradient(180deg, rgba(18, 29, 52, 0.78), rgba(15, 23, 41, 0.92));
  border: 1px solid var(--vk-border);
  border-radius: 14px;
  padding: 1.15rem 1.2rem;
  margin: 0;
}

.vk-benefit-card-wide {
  grid-column: 1 / -1;
}

.vk-benefit-icon {
  font-size: 1.35rem;
  line-height: 1;
  margin-bottom: 0.45rem;
}

.vk-benefit-card h4 {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  color: var(--vk-text);
  font-weight: 600;
}

.vk-benefit-card p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--vk-muted);
  line-height: 1.55;
}

.vk-checklist {
  margin: 0.35rem 0 0;
  padding-left: 1.1rem;
  color: var(--vk-muted);
}

.vk-checklist li {
  margin-bottom: 0.35rem;
}

.vk-security-card {
  margin-top: 0.65rem;
  max-width: 100%;
}

.vk-audience-list {
  margin-top: 0.35rem;
}

.vk-pitch-cta {
  margin-top: 1.25rem;
  padding: 1.25rem 1.2rem;
  border-radius: 14px;
  border: 1px solid rgba(107, 197, 255, 0.35);
  background: linear-gradient(140deg, rgba(107, 197, 255, 0.08), rgba(127, 140, 255, 0.06));
  text-align: center;
}

.vk-pitch-cta p {
  margin: 0.2rem 0;
  color: var(--vk-muted);
}

.vk-pitch-try {
  margin: 0 0 0.35rem !important;
  color: var(--vk-text) !important;
  font-size: 1.05rem;
}

@media (max-width: 900px) {
  .vk-benefit-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .vk-benefit-card-wide {
    grid-column: auto;
  }

  .grid-2,
  .grid-3,
  .deep-grid {
    grid-template-columns: 1fr;
  }

  .toc {
    grid-template-columns: 1fr;
  }

  .kv-grid {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .hero {
    padding-top: 3.2rem;
  }

  .site-header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-right {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
}

/* Share-Buttons (WhatsApp, X, Telegram) – gleiche Struktur wie styles.css, Farben an VisuKey angepasst */
.share {
  margin: 2.25rem auto 1.5rem;
  padding: 1.25rem 1rem;
  max-width: 720px;
  text-align: center;
}

.share-label {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--vk-muted);
  letter-spacing: 0.02em;
}

.share-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  justify-content: center;
  align-items: center;
}

.share-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.25rem;
  padding: 0.35rem 0.75rem;
  border-radius: 10px;
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none !important;
  color: #fff !important;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease, background-color 0.18s ease;
}

.share-button:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.45);
  filter: brightness(0.92);
}

.share-button:active {
  transform: translateY(0) scale(0.98);
}

.share-button-icon {
  display: inline-flex;
  flex: 0 0 auto;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  line-height: 0;
  width: 1.125rem;
  height: 1.125rem;
  max-width: 1.125rem;
  max-height: 1.125rem;
  overflow: hidden;
}

.share svg,
.share-button-icon svg {
  width: 1.125rem !important;
  height: 1.125rem !important;
  max-width: 18px !important;
  max-height: 18px !important;
  min-width: 0;
  display: block;
  flex: none !important;
  vertical-align: middle;
  overflow: hidden;
}

.share-button--whatsapp {
  background: #25d366;
}

.share-button--whatsapp:hover {
  filter: brightness(0.9);
}

.share-button--x {
  background: #0f1419;
}

.share-button--x:hover {
  background: #1a2228;
  filter: none;
}

.share-button--telegram {
  background: #0088cc;
}

.share-button--telegram:hover {
  filter: brightness(0.92);
}

@media (max-width: 480px) {
  .share-buttons {
    flex-direction: column;
    width: 100%;
    max-width: 280px;
    margin-left: auto;
    margin-right: auto;
  }

  .share-button {
    width: 100%;
    justify-content: center;
  }
}