/* Modern Tailwind-inspired Design System */

:root {
  /* Colors - Material Design inspired */
  --primary-50: #e3f2fd;
  --primary-100: #bbdefb;
  --primary-200: #90caf9;
  --primary-300: #64b5f6;
  --primary-400: #42a5f5;
  --primary-500: #2196f3;
  --primary-600: #1e88e5;
  --primary-700: #1976d2;
  --primary-800: #1565c0;
  --primary-900: #0d47a1;
  
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #eeeeee;
  --gray-300: #e0e0e0;
  --gray-400: #bdbdbd;
  --gray-500: #9e9e9e;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;
  
  --success: #4caf50;
  --error: #f44336;
  --warning: #ff9800;
  --info: #2196f3;
  
  /* Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;      /* 48px */
  
  /* Typography */
  --font-sans: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Roboto Mono', monospace;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Border Radius */
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Utility Classes */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: var(--spacing-sm);
}

.gap-4 {
  gap: var(--spacing-md);
}

.gap-6 {
  gap: var(--spacing-lg);
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  border: 1px solid var(--gray-200);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--gray-200);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.card-body {
  color: var(--gray-700);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--primary-600);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-700);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-900);
  border: 1px solid var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-200);
  border-color: var(--gray-400);
}

.btn-danger {
  background: var(--error);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: #d32f2f;
  box-shadow: var(--shadow-md);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: var(--spacing-sm);
}

.form-control {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  background: white;
  color: var(--gray-900);
  transition: all var(--transition-base);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.form-control::placeholder {
  color: var(--gray-400);
}

select.form-control {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
  appearance: none;
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.table thead {
  background: var(--gray-50);
}

.table th {
  padding: var(--spacing-md);
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-600);
  border-bottom: 2px solid var(--gray-200);
}

.table td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-700);
}

.table tbody tr {
  transition: background var(--transition-fast);
}

.table tbody tr:hover {
  background: var(--gray-50);
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-success {
  background: rgba(76, 175, 80, 0.1);
  color: var(--success);
}

.badge-error {
  background: rgba(244, 67, 54, 0.1);
  color: var(--error);
}

.badge-warning {
  background: rgba(255, 152, 0, 0.1);
  color: var(--warning);
}

.badge-info {
  background: rgba(33, 150, 243, 0.1);
  color: var(--info);
}

.badge-primary {
  background: rgba(33, 150, 243, 0.1);
  color: var(--primary-700);
}

.badge-giris {
  background: rgba(76, 175, 80, 0.1);
  color: #2e7d32;
}

.badge-cikis {
  background: rgba(158, 158, 158, 0.1);
  color: var(--gray-700);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (min-width: 640px) {
  .sm\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  
  .md\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Stats Cards */
.stat-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.stat-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-600);
  margin-bottom: var(--spacing-sm);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1;
}

/* Sidebar */
.sidebar-layout {
  display: flex;
  min-height: 100vh;
  background: var(--gray-50);
}

.sidebar {
  width: 260px;
  background: white;
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--gray-200);
}

.sidebar-menu {
  flex: 1;
  padding: var(--spacing-md);
}

.sidebar-menu-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--gray-700);
  text-decoration: none;
  transition: all var(--transition-base);
  margin-bottom: var(--spacing-xs);
}

.sidebar-menu-item:hover {
  background: var(--gray-100);
  color: var(--gray-900);
}

.sidebar-menu-item.active {
  background: var(--primary-50);
  color: var(--primary-700);
  font-weight: 500;
}

.sidebar-menu-item-icon {
  font-size: 1.25rem;
  width: 24px;
  text-align: center;
}

.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--gray-200);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 260px;
  min-height: 100vh;
}

.main-content-header {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.main-content-body {
  padding: var(--spacing-xl);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

/* Loading States */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary-600);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Snackbar */
.snackbar {
  position: fixed;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  background: var(--gray-900);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  z-index: 1000;
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* Charts Container */
.chart-container {
  position: relative;
  height: 300px;
  margin: var(--spacing-lg) 0;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--gray-500);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

/* Row/Col System */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(-1 * var(--spacing-sm));
}

.col-1, .col-2, .col-3, .col-4, .col-5, .col-6, .col-12 {
  padding: 0 var(--spacing-sm);
}

.col-1 { width: 8.333333%; }
.col-2 { width: 16.666667%; }
.col-3 { width: 25%; }
.col-4 { width: 33.333333%; }
.col-5 { width: 41.666667%; }
.col-6 { width: 50%; }
.col-12 { width: 100%; }

@media (max-width: 768px) {
  .col-1, .col-2, .col-3, .col-4, .col-5, .col-6 {
    width: 100%;
  }
}