body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  max-width: 860px;
  margin: 40px auto;
  /* margin: 20px auto; */
  padding: 0 16px;
  padding-left: 30px;
  padding-right: 30px;
  line-height: 1.5;
}

h1 {
  margin: 0;
  padding: 0;
  margin-bottom: 20px;
}

label {
  display: block;
  margin: 8px 0;
}

.row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 8px 0;
  flex-wrap: wrap;
}

input[type="number"] {
  width: 90px;
  padding: 6px;
}

.result {
  margin-top: 16px;
  padding: 12px;
  background: #f3f3f3;
  border-radius: 8px;
  word-break: break-all;
}

.error {
  color: #a00;
  margin-top: 12px;
}

button {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid #ddd;
  background: #fff;
  cursor: pointer;
}

button:hover {
  background: #f7f7f7;
}

.muted {
  color: #666;
  font-size: 0.92em;
}

.password {
  margin-top: 8px;
  font-family: monospace;
  font-size: 1.1em;
}

.pw-container {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
}

.password {
  font-family: monospace;
  font-size: 1.1em;
  padding: 6px;
  border: 1px solid #ccc;
  border-radius: 6px;
  flex: 1;
}

.eye-btn {
  font-size: 1.1em;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  cursor: pointer;
  padding: 4px 8px;
}

.eye-btn:hover {
  background: #f7f7f7;
}