body {
  font-family: Arial, sans-serif;
  background: #f3f4f6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  justify-content: flex-start;
  align-items: center;
}

.container {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  margin-top: 90px;
}

h1 {
  margin-bottom: 1rem;
  text-align: center;
}

#drop_zone {
  display: flex;
  justify-content: center;
  padding-top: 30px;
  background-color: #2563eb;
  border-radius: 5px;
  width: 200px;
  height: 100px;
  margin: 5px auto;
  font-family: Calibri, 'Trebuchet MS', sans-serif;
}

#drop_zone:hover {
  background-color: #255acd;
  transition: 0.3s;
  cursor: pointer;
}

#drop_zone p {
  color: white;
  font-size: 16px;
  text-align: center;
}


.controls {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

input[type="number"] {
  width: 100px;
  padding: 5px;
}

button {
  padding: 10px;
  margin-top: 10px;
  background: #2563eb;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.output {
  margin-top: 1rem;
  text-align: center;
}

.header {
  background: #2563eb;
  color: white;
  padding: 1rem;
  text-align: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
}

.footer {
  background: #f3f4f6;
  color: #333;
  text-align: center;
  padding: 1rem;
  width: 100%;
  margin-top: auto;
  position: static;
}