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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #f5f5f5;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}

.app {
  min-height: 100vh;
}

.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #4a5568;
}

.login-box {
  background: white;
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 400px;
}

.login-box h2 {
  margin-bottom: 30px;
  color: #333;
  text-align: center;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  color: #555;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 14px;
  transition: border-color 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: #4a5568;
}

.btn {
  width: 100%;
  padding: 12px;
  background: #4a5568;
  color: white;
  border: none;
  border-radius: 5px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.btn:hover {
  background: #2d3748;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.error-message {
  background-color: #fee;
  color: #c33;
  padding: 10px;
  border-radius: 5px;
  margin-bottom: 15px;
  text-align: center;
}

.dashboard {
  display: flex;
  min-height: 100vh;
  background-color: #f5f5f5;
}

.dashboard-container {
  display: flex;
  width: 100%;
}

.side-menu {
  width: 250px;
  background: white;
  box-shadow: 2px 0 5px rgba(0,0,0,0.1);
  padding: 20px 0;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  overflow-y: auto;
}

.side-menu-header {
  padding: 0 20px 20px;
  border-bottom: 1px solid #eee;
  margin-bottom: 20px;
}

.side-menu-header h2 {
  font-size: 18px;
  color: #333;
  margin-bottom: 10px;
}

.menu-items {
  list-style: none;
}

.menu-item {
  padding: 12px 20px;
  cursor: pointer;
  transition: all 0.2s;
  border-left: 3px solid transparent;
  color: #666;
  font-size: 14px;
}

.menu-item:hover {
  background-color: #f8f9fa;
  color: #4a5568;
}

.menu-item.active {
  background-color: #e2e8f0;
  border-left-color: #4a5568;
  color: #4a5568;
  font-weight: 500;
}

.main-content {
  margin-left: 250px;
  flex: 1;
  padding: 20px;
}

.dashboard-header {
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dashboard-header h1 {
  color: #333;
  font-size: 24px;
  margin: 0;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 15px;
}

.user-info span {
  color: #666;
}

.btn-logout {
  padding: 8px 16px;
  background: #dc3545;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}

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

.tabs {
  display: none;
}

.tab-button {
  padding: 10px 20px;
  background: white;
  border: 2px solid #4a5568;
  color: #4a5568;
  border-radius: 5px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s;
}

.tab-button.active {
  background: #4a5568;
  color: white;
}

.tab-button:hover {
  background: #4a5568;
  color: white;
}

.period-selector {
  background: white;
  padding: 15px;
  border-radius: 10px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.period-selector label {
  margin-right: 10px;
  font-weight: 500;
  color: #333;
}

.period-selector select {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 14px;
  cursor: pointer;
}

.data-table {
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  overflow: hidden;
}

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

.data-table th {
  background: #4a5568;
  color: white;
  padding: 15px;
  text-align: left;
  font-weight: 500;
}

.data-table td {
  padding: 12px 15px;
  border-bottom: 1px solid #f0f0f0;
  color: #333;
}

.data-table tr:hover {
  background-color: #f8f9fa;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.loading {
  text-align: center;
  padding: 40px;
  color: #666;
  font-size: 18px;
}

.no-data {
  text-align: center;
  padding: 40px;
  color: #999;
}

.summary-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
  margin-bottom: 20px;
}

.stat-card {
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-card h3 {
  color: #666;
  font-size: 14px;
  margin-bottom: 10px;
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: bold;
  color: #4a5568;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.pagination-btn {
  padding: 8px 16px;
  background: #4a5568;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.pagination-btn:hover:not(:disabled) {
  background: #2d3748;
}

.pagination-btn:disabled {
  background: #ccc;
  cursor: not-allowed;
  transform: none;
}

.pagination-info {
  color: #666;
  font-size: 14px;
  font-weight: 500;
  padding: 0 10px;
}