body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #FFD700, #C0C0C0); /* золото + серебро */
  color: #fff;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.card {
  background: #ffffffdd;
  color: #0f172a;
  padding: 40px;
  border-radius: 18px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
  max-width: 600px;
  text-align: center;
}

.logo {
  max-width: 200px;
  height: auto;
  margin: 0 auto 20px;
  display: block;
}

h1 {
  font-size: 1.6rem;
  margin: 20px 0;
  color: #333;
}

.footer {
  margin-top: 30px;
  font-size: 0.9rem;
  color: #333;
}

.btn-instagram {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  padding: 12px 24px;
  background: linear-gradient(135deg, #FFD700, #DAA520);
  color: #0f172a;
  font-weight: bold;
  border-radius: 25px;
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 1rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.btn-instagram:hover {
  background: linear-gradient(135deg, #FFEA00, #B8860B);
  color: #000;
}

.btn-instagram svg {
  width: 20px;
  height: 20px;
  fill: #0f172a;
  transition: fill 0.3s ease;
}

.btn-instagram:hover svg {
  fill: #000;
}