* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f5f5f5;
  min-height: 100vh;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding: 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header h1 {
  font-size: 24px;
  color: #333;
}

.file-list {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  overflow: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid #eee;
}

th {
  background: #f8f9fa;
  font-weight: 600;
  color: #555;
}

td a {
  color: #0066cc;
  text-decoration: none;
}

td a:hover {
  text-decoration: underline;
}

.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}

.btn-primary {
  background: #0066cc;
  color: white;
}

.btn-primary:hover {
  background: #0052a3;
}

.btn-danger {
  background: #dc3545;
  color: white;
}

.btn-danger:hover {
  background: #c82333;
}

.btn-upload {
  background: #28a745;
  color: white;
}

.btn-upload:hover {
  background: #218838;
}

.btn-sm {
  padding: 4px 12px;
  font-size: 12px;
}

.loading, .empty, .error {
  padding: 40px;
  text-align: center;
  color: #888;
}

.error {
  color: #dc3545;
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content {
  background: white;
  border-radius: 8px;
  width: 90%;
  max-width: 400px;
  overflow: hidden;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  border-bottom: 1px solid #eee;
}

.modal-header h3 {
  font-size: 18px;
}

.close {
  font-size: 24px;
  cursor: pointer;
  color: #888;
}

.close:hover {
  color: #333;
}

.modal-body {
  padding: 16px;
}

.modal-body input[type="password"],
.modal-body input[type="file"] {
  width: 100%;
  padding: 10px;
  margin-bottom: 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
}

.modal-body .btn {
  width: 100%;
}

.modal-body p {
  margin-bottom: 12px;
  color: #555;
}