/* Reset and base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
}

/* Header */
.header {
  background-color: #4B7748;
  color: #fff;
  padding: 20px;
  text-align: center;
}
.header h1 {
  font-size: 2.5rem;
  margin-bottom: 5px;
}
.header p {
  font-size: 1rem;
  opacity: 0.9;
}

/* Container */
.container {
  max-width: 600px;
  margin: 30px auto;
  background-color: #fff;
  padding: 40px 30px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Form elements */
label {
  display: block;
  margin-bottom: 15px;
  font-weight: 600;
  color: #555;
}
input[type="text"],
input[type="file"] {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin-top: 5px;
}

button,
input[type="submit"] {
  background-color: #4B7748;
  color: #ffffff;
  border: none;
  padding: 12px 25px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: background-color 0.3s ease;
}
button:hover:not(:disabled),
input[type="submit"]:hover:not(:disabled) {
  background-color: #3f663f;
}
button:disabled,
input[type="submit"]:disabled {
  background-color: #cccccc;
  cursor: not-allowed;
}

/* Summary and errors */
.upload-summary {
  list-style: none;
  margin-top: 20px;
}
.upload-summary li {
  margin-bottom: 10px;
  color: #555;
}
.error {
  color: #e74c3c;
  font-weight: bold;
  margin-bottom: 15px;
}