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

body {
  margin: 0;
  background: #f5f7fb;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

/* Card */
.container {
  background: #ffffff;
  padding: 30px;
  width: 500px;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Title */
h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

/* Labels */
label {
  font-size: 14px;
  font-weight: bold;
  margin-bottom: 6px;
  display: block;
  color: #555;
}

/* Inputs */
textarea,
input {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border-radius: 8px;
  border: 1px solid #ddd;
  font-size: 14px;
}

textarea {
  resize: vertical;
  min-height: 100px;
}

/* Button */
button {
  width: 100%;
  padding: 12px;
  background: #4f46e5;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  cursor: pointer;
  transition: 0.2s;
}

button:hover {
  background: #4338ca;
}

button:disabled {
  background: #a5b4fc;
  cursor: not-allowed;
}

/* Output */
.output {
  margin-top: 20px;
  background: #f9fafb;
  padding: 12px;
  border-radius: 8px;
  font-size: 13px;
  white-space: pre-wrap;
  max-height: 250px;
  overflow-y: auto;
  border: 1px solid #eee;
}

/* Utility */
.hidden {
  display: none;
}

.loading {
  text-align: center;
  color: #666;
}