#szk-container {
  max-width: 100%;
  width: 360px;
  background: #fff;
  border: 1px solid #ddd;
  padding: 1.2em;
  font-family: sans-serif;
  border-radius: 6px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  margin: 1em auto;
}

#szk-container label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.8em;
  font-size: 1rem;
  color: #333;
}

#szk-container input[type="number"] {
  width: 100px;
  padding: 6px 8px;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
}

#szk-container input[type="checkbox"] {
  transform: scale(1.2);
  margin-right: 8px;
}

#szk-container button {
  width: 100%;
  padding: 12px;
  background-color: #0073e6;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color .2s ease;
}

#szk-container button:hover {
  background-color: #005bb5;
}

#szk-result {
  margin-top: 1em;
  font-size: 1.2rem;
  font-weight: bold;
  color: #222;
}

@media (max-width: 400px) {
  #szk-container {
    width: 90%;
    padding: 1em;
  }
  #szk-container input[type="number"] {
    width: 80px;
  }
}