body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: linear-gradient(135deg, #0f172a, #020617);
  color: white;
  text-align: center;
}

.container {
  margin-top: 80px;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.subtitle {
  color: #94a3b8;
  margin-bottom: 30px;
}

.card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(12px);
  border-radius: 20px;
  padding: 30px;
  width: 320px;
  margin: auto;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

button {
  margin: 10px;
  padding: 10px 20px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: white;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

img {
  margin-top: 15px;
  width: 100%;
  border-radius: 12px;
  display: none;
}

.result {
  margin-top: 15px;
  font-size: 1rem;
  white-space: pre-line;
}

.footer {
  margin-top: 20px;
  font-size: 12px;
  color: #64748b;
}

iframe {
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}