body {
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f5f7fa;
  color: #1a1a1a;
}

header {
  text-align: center;
  padding: 40px 20px 20px;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  margin-bottom: 100px;
}

.btn {
  display: inline-block;
  background: rgba(255, 136, 0, 0.35);
  color: #1a1a1a;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  font-size: 22px;
  font-weight: 600;
  padding: 18px 32px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  text-decoration: none;
  transition: all 0.3s ease;
  margin: 12px auto;
  text-align: center;
  width: 100%;
  max-width: 480px;
}

.btn:hover {
  background: rgba(255, 136, 0, 0.6);
  transform: scale(1.03);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  color: #000;
}

.logo-background {
  position: absolute;
  top: 40%;
  left: 0;
  width: 100%;
  opacity: 0.08;
  text-align: center;
  z-index: 0;
  pointer-events: none;
}

.logo-background img {
  max-width: 90%;
  height: auto;
}

/* ФУТЕР */

footer {
  background-color: #2e343a;
  color: #fff;
  display: flex;
  justify-content: center;
  padding: 60px 20px 20px;
  font-size: 0.9rem;
}

.footer-container {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  width: 100%;
  max-width: 1200px;
}

.footer-column {
  flex: 1 1 200px;
  margin: 10px 20px;
  min-width: 160px;
}

.footer-column h4 {
  margin-bottom: 10px;
  font-weight: bold;
  font-size: 1rem;
  color: #ffffff;
}

.footer-column a,
.footer-column p {
  display: block;
  margin-bottom: 6px;
  color: #ffffff;
  text-decoration: none;
  font-weight: 400;
}

.footer-column a:hover {
  text-decoration: underline;
  color: #ffffff;
}

/* МОБИЛЬНАЯ АДАПТАЦИЯ */

@media (max-width: 768px) {
  footer {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer-container {
    flex-direction: column;
    align-items: center;
  }

  .footer-column {
    margin: 10px 0;
  }

  .btn {
    font-size: 18px;
    padding: 16px 24px;
  }

  header p {
    font-size: 1rem;
  }

  main {
    padding: 10px;
  }

  .seo-text,
  .seo-block {
    padding: 10px;
    font-size: 0.95rem;
  }
}