* {
  box-sizing: border-box;
}

:root {
  --eth-brand: #627eea;
  --eth-brand-mid: #8b9cff;
  --eth-bg-0: #07070d;
  --eth-bg-1: #0e0e18;
  --eth-bg-2: #14142a;
  --eth-surface: rgba(255, 255, 255, 0.06);
  --eth-surface-card: rgba(255, 255, 255, 0.08);
  --eth-text: #e8eaf6;
  --eth-muted: #9ca3c7;
  --eth-border: rgba(98, 126, 234, 0.28);
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  color: var(--eth-text);
  background: linear-gradient(180deg, var(--eth-bg-0) 0%, var(--eth-bg-1) 50%, #0a0a14 100%);
  min-height: 100vh;
}

.topbar {
  background: rgba(14, 14, 28, 0.92);
  color: var(--eth-text);
  border-bottom: 1px solid var(--eth-border);
  backdrop-filter: blur(10px);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
}

.brand-mini {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--eth-text);
  text-decoration: none;
}

.brand-mini img {
  width: 26px;
  height: 26px;
  border-radius: 50%;
}

.brand-mini:hover {
  opacity: 0.9;
}

.lang-switch {
  display: flex;
  gap: 6px;
}

.lang-btn {
  border: 1px solid var(--eth-border);
  background: var(--eth-surface);
  color: var(--eth-text);
  text-decoration: none;
  display: inline-block;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
}

.lang-btn.active {
  background: rgba(98, 126, 234, 0.35);
  border-color: var(--eth-brand);
  color: #fff;
}

.container {
  width: min(1080px, 92%);
  margin: 0 auto;
}

.hero {
  background: linear-gradient(165deg, #12121f 0%, #1a1a32 50%, #0f1020 100%);
  color: var(--eth-text);
  padding: 64px 0 56px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 28px;
  align-items: center;
}

.logo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  box-shadow: 0 12px 40px rgba(98, 126, 234, 0.25);
}

h1 {
  margin: 0;
  font-size: 52px;
  line-height: 1.1;
}

.subtitle {
  margin: 8px 0 0;
  font-size: 18px;
  opacity: 0.92;
  color: var(--eth-muted);
}

.lead {
  margin: 14px 0 0;
  max-width: 680px;
  line-height: 1.7;
  color: var(--eth-muted);
}

.actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--eth-border);
  color: var(--eth-text);
  background: var(--eth-surface);
  text-decoration: none;
  font-weight: 600;
}

.btn.primary {
  background: rgba(98, 126, 234, 0.35);
  border-color: var(--eth-brand);
  color: #fff;
}

main {
  margin-top: 24px;
  display: grid;
  gap: 16px;
}

.hero + main.container {
  margin-top: 34px;
}

.card {
  background: var(--eth-surface-card);
  border: 1px solid var(--eth-border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

.card h2 {
  margin: 0 0 14px;
  font-size: 22px;
  color: var(--eth-text);
}

.muted {
  margin: 8px 0 0;
  color: var(--eth-muted);
  line-height: 1.65;
}

.cards {
  margin-top: 16px;
  display: grid;
  gap: 14px;
}

.cards.three {
  grid-template-columns: repeat(3, 1fr);
}

.cards .card {
  background: var(--eth-surface);
  border: 1px solid var(--eth-border);
  box-shadow: none;
}

.cards .card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--eth-text);
}

.cards .card p {
  margin: 0;
  color: var(--eth-muted);
  line-height: 1.65;
  font-size: 14px;
}

.faq {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.faq details {
  border: 1px solid var(--eth-border);
  border-radius: 10px;
  padding: 12px 14px;
  background: var(--eth-surface);
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--eth-text);
}

.faq details p {
  margin: 10px 0 0;
  color: var(--eth-muted);
  line-height: 1.7;
}

.project-bg-wrap h2 {
  margin: 0 0 10px;
}

.project-bg h3 {
  margin: 22px 0 10px;
  font-size: 20px;
  color: var(--eth-text);
}

.project-bg h4 {
  margin: 14px 0 8px;
  font-size: 17px;
  color: var(--eth-brand-mid);
}

.project-bg p {
  margin: 0 0 12px;
  line-height: 1.85;
  color: var(--eth-muted);
}

.project-bg ul {
  margin: 0 0 12px;
  padding-left: 20px;
}

.project-bg li {
  margin: 0 0 8px;
  line-height: 1.8;
  color: var(--eth-muted);
}

.cert-grid {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cert-grid img {
  width: auto;
  max-width: 100%;
  height: auto;
  border: 0;
  border-radius: 0;
  background: transparent;
  display: block;
}

.bg-note {
  margin: 0 0 16px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(98, 126, 234, 0.12);
  border-left: 3px solid var(--eth-brand);
  color: var(--eth-muted);
  font-size: 14px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.grid div {
  padding: 12px;
  border: 1px solid var(--eth-border);
  border-radius: 10px;
  background: var(--eth-surface);
}

.grid span {
  display: block;
  color: var(--eth-muted);
  font-size: 13px;
}

.grid strong {
  display: block;
  margin-top: 4px;
  font-size: 16px;
  color: var(--eth-text);
}

.address {
  display: inline-block;
  background: rgba(98, 126, 234, 0.1);
  border: 1px solid var(--eth-border);
  padding: 10px 12px;
  border-radius: 8px;
  margin-top: 4px;
  font-size: 14px;
  word-break: break-all;
  color: var(--eth-brand-mid);
}

.links {
  margin-top: 12px;
  display: flex;
  gap: 14px;
}

.links a {
  color: var(--eth-brand-mid);
  text-decoration: none;
  font-weight: 600;
}

.footer {
  margin: 24px auto 40px;
  color: var(--eth-muted);
  font-size: 14px;
}

sethg {
  color: var(--eth-brand-mid);
  font-weight: 600;
}

@media (max-width: 760px) {
  .topbar-inner {
    min-height: 52px;
  }

  .lang-btn {
    padding: 6px 9px;
    font-size: 12px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 20px;
  }

  .logo {
    width: 112px;
    height: 112px;
    margin: 0 auto;
  }

  h1 {
    font-size: 38px;
  }

  .subtitle {
    font-size: 16px;
  }

  .lead {
    font-size: 14px;
    line-height: 1.7;
  }

  .actions {
    justify-content: center;
  }

  .btn {
    width: 100%;
    text-align: center;
    padding: 12px 16px;
  }

  .card {
    padding: 16px;
    border-radius: 12px;
  }

  .cards.three {
    grid-template-columns: 1fr;
  }

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

  .address {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .cert-grid { gap: 10px; }

  .footer {
    text-align: center;
  }
}