* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
}

.card {
  background: #111827;
  border: 1px solid #1f2937;
  border-radius: 12px;
  padding: 16px;
}

h1,
h2,
h3 {
  margin-top: 0;
}

label {
  display: block;
  margin-top: 12px;
  margin-bottom: 6px;
  font-size: 14px;
  color: #93c5fd;
}

input,
textarea,
button {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #334155;
  background: #0b1220;
  color: #e2e8f0;
  padding: 10px 12px;
  font-size: 16px;
}

textarea {
  resize: vertical;
}

button {
  margin-top: 14px;
  background: #2563eb;
  border: none;
  font-weight: 600;
}

button:active {
  transform: scale(0.995);
}

.ghost {
  width: auto;
  margin-top: 0;
  background: transparent;
  border: 1px solid #334155;
}

.hidden {
  display: none;
}

.muted {
  color: #94a3b8;
  margin-top: -6px;
}

.error {
  color: #fca5a5;
  min-height: 20px;
}

.output {
  margin-top: 16px;
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.version {
  margin: 10px 4px 0;
  font-size: 12px;
  color: #64748b;
  text-align: right;
}