body {
  font-family: sans-serif;
  color: #ffffff;
  padding: 1rem;
  display: flex;
  justify-content: center;
  background: url('images/background.jpg') no-repeat center center fixed;
  background-size: cover;
}
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.4);
  z-index: -1;
}
main {
  max-width: 500px;
  width: 100%;
}
button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.75rem 1.5rem;       /* larger click area */
  font-size: 1rem;              /* readable text */
  font-weight: 600;
  color: #ffffff;               /* button text */
  background-color: #3498db;    /* primary blue */
  border: none;                 /* remove default */
  border-radius: 8px;           /* rounded corners */
  box-shadow: 0 4px 6px rgba(0,0,0,0.1); /* soft shadow */
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
}
button:hover {
  background-color: #217dbb;
  transform: translateY(-2px);
}
button:active {
  background-color: #1a5d8c;
  transform: translateY(0);
}
button:disabled {
  background-color: #95a5a6;
  cursor: not-allowed;
  box-shadow: none;
}
/* Reuse your existing button rules */
.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  background-color: #3498db;
  border: none;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  cursor: pointer;
  text-align: center;
  transition: background-color 0.2s ease, transform 0.1s ease;
}
.btn:hover { background-color: #217dbb; transform: translateY(-2px); }
.btn:active { background-color: #1a5d8c; transform: translateY(0); }
/* Change the selected-filename text (and “No file chosen” placeholder) */
input[type="file"] {
  color: #ffffff;           /* or your desired text colour */
}

/* Fallbacks for some browsers */
input[type="file"]::-webkit-file-upload-text { 
  color: #ffffff; 
}
input[type="file"]::-ms-value { 
  color: #ffffff; 
}

#status {
  margin-top: 1rem;
}