@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --primary-color: #3B82F6;
  --success-color: #10B981;
  --danger-color: #EF4444;
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --bg-light: #F9FAFB;
  --border-color: #E5E7EB;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: #ffffff;
  color: var(--text-primary);
  line-height: 1.6;
}

.app-header {
  background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
  color: white;
  padding: 1.5rem;
  border-radius: 0 0 1.5rem 1.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.section-title {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary);
  margin: 2rem 0 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--primary-color);
  border-radius: 2px;
}

.chart-card {
  background: white;
  border-radius: 1rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: transform 0.2s ease;
}

.chart-card:hover {
  transform: translateY(-3px);
}

.chart-header {
  padding: 1.25rem;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chart-header h4 {
  margin: 0;
  font-weight: 600;
  color: var(--text-primary);
}

.trend-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.chart-container {
  padding: 1rem;
  height: 300px;
  position: relative;
}

.no-data-text {
  text-align: center;
  color: var(--text-secondary);
  padding: 2rem;
  background: var(--bg-light);
  border-radius: 0.75rem;
}

/* Navigasyon Butonları */
.nav-menu a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 0.75rem;
  font-weight: 500;
  transition: all 0.2s ease;
  background: var(--primary-color);
  color: white;
  margin: 0.5rem;
  text-decoration: none;
}

.nav-menu a:hover {
  background: #2563EB;
  transform: translateY(-2px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* İstatistik Kartları */
.card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
  text-align: center;
}

.card-title {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.card-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }
  
  .app-header {
    border-radius: 0;
    padding: 1rem;
  }
  
  .section-title {
    font-size: 1.25rem;
  }
  
  .nav-menu a {
    width: 100%;
    margin: 0.5rem 0;
  }
  
  .chart-container {
    height: 250px;
  }
}