* {
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  margin: 0;
  background: #f4f6fb;
  color: #222;
}

header {
  background: linear-gradient(135deg, #4f46e5, #0ea5e9);
  color: white;
  padding: 30px 15px;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 28px;
}

main {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}

.card {
  background: white;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 12px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.card h2 {
  margin-top: 0;
  color: #4f46e5;
}

input[type="text"],
input[type="file"] {
  width: 100%;
  padding: 12px;
  margin: 10px 0;
  border-radius: 8px;
  border: 1px solid #ccc;
}

button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 10px;
  background: #4f46e5;
  color: white;
  font-size: 16px;
  cursor: pointer;
  margin-top: 10px;
}

button:disabled {
  background: #9ca3af;
  cursor: not-allowed;
}

.preview-box {
  margin-top: 15px;
  padding: 15px;
  background: #f1f5f9;
  border-radius: 8px;
  min-height: 80px;
}

.price {
  font-size: 18px;
  color: #16a34a;
  font-weight: bold;
}

.payment-box {
  background: #ecfeff;
  border: 1px dashed #06b6d4;
  padding: 12px;
  border-radius: 8px;
  margin: 10px 0;
}

footer {
  text-align: center;
  padding: 15px;
  font-size: 14px;
  color: #666;
}