* {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.upload-container {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  width: 90%;
  max-width: 400px;
  text-align: center;
}

h1 {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  color: #333;
}

input[type="file"] {
  margin-bottom: 1rem;
  width: 100%;
  display: none;
}

button {
  background-color: #007bff;
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  width: 100%;
}

button:hover {
  background-color: #0056b3;
}

.custom-file-upload {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: #6c63ff;
  color: white;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  margin-bottom: 1rem;
  transition: background-color 0.3s ease;
  width: 100%;
  text-align: center;
}

.custom-file-upload:hover {
  background-color: #5548d9;
}

.file-name-display {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.95rem;
  color: #555;
  word-break: break-word;
}