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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f5f7fa;
  color: #333;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Login */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-box {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 400px;
}

.login-box h1 {
  text-align: center;
  margin-bottom: 30px;
  font-size: 1.5rem;
}

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

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

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s;
}

.btn-primary {
  background: #2563eb;
  color: white;
  width: 100%;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-secondary {
  background: #e2e8f0;
  color: #475569;
}

.btn-secondary:hover {
  background: #cbd5e1;
}

.error {
  color: #ef4444;
  margin-top: 10px;
  text-align: center;
}

/* Dashboard */
header {
  background: white;
  padding: 20px 0;
  margin-bottom: 30px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

header h1 {
  display: inline-block;
}

.header-actions {
  float: right;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.stat-card.highlight {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: white;
}

.stat-label {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 5px;
}

.stat-card.highlight .stat-label {
  color: rgba(255,255,255,0.8);
}

.stat-value {
  font-size: 2rem;
  font-weight: bold;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.tab {
  padding: 12px 24px;
  background: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.2s;
}

.tab.active {
  background: #2563eb;
  color: white;
}

.tab-content {
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.add-form {
  margin-bottom: 25px;
  padding-bottom: 20px;
  border-bottom: 1px solid #e2e8f0;
}

.add-form h3 {
  margin-bottom: 15px;
  font-size: 1.1rem;
}

.form-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.form-row input {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 0.95rem;
}

.form-row input[type="date"],
.form-row input[type="number"] {
  width: 150px;
}

.form-row input[type="text"],
.form-row input[type="url"] {
  flex: 1;
  min-width: 200px;
}

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

.data-table th,
.data-table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #e2e8f0;
}

.data-table th {
  font-weight: 600;
  color: #666;
  font-size: 0.9rem;
}

.btn-delete {
  background: #fee2e2;
  color: #dc2626;
  padding: 6px 12px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
}

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

.status {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.85rem;
}

.status.active {
  background: #dcfce7;
  color: #16a34a;
}

.status.inactive {
  background: #fee2e2;
  color: #dc2626;
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .form-row {
    flex-direction: column;
  }
  
  .form-row input {
    width: 100% !important;
  }
}