body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: radial-gradient(circle at top, #0f172a 0%, #020617 60%, #000 100%);
  color: white;
  min-height: 100vh;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 20px;
  text-align: center;
}

.logo-area { margin-bottom: 30px; }

.main-logo { max-width: 420px; width: 100%; }

h1 { margin: 10px 0; font-size: 2.6rem; }

.subtitle { color: #94a3b8; margin-bottom: 40px; }

.card {
  background: linear-gradient(145deg, #0b1020, #050816);
  border-radius: 18px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,.8);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 25px;
}

input {
  padding: 12px;
  border-radius: 10px;
  border: none;
  font-size: 16px;
}

button {
  width: 100%;
  padding: 14px;
  font-size: 18px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(to right, #2563eb, #3b82f6);
  color: white;
  cursor: pointer;
}

button:hover { opacity: .9; }

.results {
  margin-top: 30px;
  font-size: 1.1rem;
  background: #020617;
  padding: 20px;
  border-radius: 12px;
}

.hidden { display: none; }

@media (max-width: 700px) {
  .grid { grid-template-columns: 1fr; }
}