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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

header h1 {
  font-size: 1.8rem;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.checks-display {
  background: #2ecc71;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.checks-icon {
  font-size: 1.2rem;
}

.logout-btn {
  background: #e74c3c;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.3s;
}

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

.container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
  flex: 1;
}

.tabs {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid rgba(255, 255, 255, 0.3);
}

.tab-btn {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: none;
  padding: 1rem 2rem;
  cursor: pointer;
  border-radius: 5px 5px 0 0;
  font-size: 1rem;
  transition: background 0.3s;
}

.tab-btn:hover,
.tab-btn.active {
  background: rgba(255, 255, 255, 0.4);
}

.tab-content {
  display: none;
  background: white;
  border-radius: 10px;
  padding: 2rem;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.tab-content.active {
  display: block;
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
  color: #333;
}

input, textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s;
}

input:focus, textarea:focus {
  outline: none;
  border-color: #667eea;
}

button {
  background: #667eea;
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s;
}

button:hover {
  background: #5568d3;
}

.btn-secondary {
  background: #95a5a6;
}

.btn-secondary:hover {
  background: #7f8c8d;
}

.btn-danger {
  background: #e74c3c;
}

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

.btn-success {
  background: #2ecc71;
}

.btn-success:hover {
  background: #27ae60;
}

.message {
  padding: 1rem;
  border-radius: 5px;
  margin-bottom: 1rem;
  display: none;
}

.message.show {
  display: block;
}

.message.success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.message.error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.message.info {
  background: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: #f8f9fa;
  border-radius: 10px;
  padding: 1.5rem;
  border: 1px solid #dee2e6;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.card h3 {
  color: #667eea;
  margin-bottom: 0.5rem;
}

.card p {
  color: #666;
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #dee2e6;
}

.price-badge {
  background: #2ecc71;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  font-weight: bold;
  display: inline-block;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

th {
  background: #f8f9fa;
  padding: 1rem;
  text-align: left;
  border-bottom: 2px solid #dee2e6;
  font-weight: bold;
}

td {
  padding: 1rem;
  border-bottom: 1px solid #dee2e6;
}

tr:hover {
  background: #f8f9fa;
}

.status-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 3px;
  font-size: 0.85rem;
  font-weight: bold;
}

.status-pending {
  background: #fff3cd;
  color: #856404;
}

.status-completed {
  background: #d4edda;
  color: #155724;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.loading {
  text-align: center;
  color: #666;
  padding: 2rem;
}

.spinner {
  border: 4px solid #f3f3f3;
  border-top: 4px solid #667eea;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: #999;
}

.empty-state h2 {
  margin-bottom: 1rem;
  color: #666;
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 1rem;
  }

  .user-info {
    flex-direction: column;
    width: 100%;
    gap: 1rem;
  }

  .tabs {
    flex-direction: column;
  }

  .tab-btn {
    border-radius: 5px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}