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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

#admin-container {
  max-width: 1200px;
  margin: 0 auto;
}

/* Login Section */
#login-section {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  margin: 100px auto;
}

#login-section h1 {
  margin-bottom: 30px;
  text-align: center;
  color: #333;
}

#login-form input {
  width: 100%;
  padding: 12px;
  margin-bottom: 15px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
}

#login-form button {
  width: 100%;
  padding: 12px;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.3s;
}

#login-form button:hover {
  background: #5568d3;
}

.error {
  color: #e74c3c;
  font-size: 14px;
  margin-top: 10px;
  text-align: center;
}

/* Admin Panel */
#admin-panel {
  background: white;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.admin-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-header h1 {
  font-size: 28px;
}

.btn-secondary {
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  margin-left: 10px;
  font-size: 14px;
  transition: background 0.3s;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
}

.admin-content {
  padding: 30px;
}

.admin-section {
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid #eee;
}

.admin-section:last-child {
  border-bottom: none;
}

.admin-section h2 {
  color: #333;
  margin-bottom: 20px;
  font-size: 20px;
}

/* Forms */
form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
  margin-bottom: 20px;
}

input, select {
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
}

button[type="submit"] {
  padding: 12px 24px;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.3s;
}

button[type="submit"]:hover {
  background: #5568d3;
}

/* Data Lists */
.data-list {
  display: grid;
  gap: 10px;
}

.data-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  background: #f8f9fa;
  border-radius: 6px;
  border: 1px solid #e9ecef;
}

.data-info {
  flex: 1;
}

.data-name {
  font-weight: bold;
  color: #333;
  margin-bottom: 5px;
}

.data-details {
  font-size: 12px;
  color: #666;
}

.btn-delete {
  padding: 8px 16px;
  background: #e74c3c;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  transition: background 0.3s;
}

.btn-delete:hover {
  background: #c0392b;
}

/* Success message */
.success {
  padding: 15px;
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
  border-radius: 6px;
  margin-bottom: 20px;
}