/* Google Material Design Style CSS */
:root {
  /* Google Material Design Colors */
  --google-blue: #4285f4;
  --google-blue-dark: #3367d6;
  --google-blue-light: #e8f0fe;
  --google-red: #ea4335;
  --google-yellow: #fbbc04;
  --google-green: #34a853;
  
  /* Neutral Colors */
  --google-gray-50: #fafafa;
  --google-gray-100: #f5f5f5;
  --google-gray-200: #eeeeee;
  --google-gray-300: #e0e0e0;
  --google-gray-400: #bdbdbd;
  --google-gray-500: #9e9e9e;
  --google-gray-600: #757575;
  --google-gray-700: #616161;
  --google-gray-800: #424242;
  --google-gray-900: #212121;
  
  /* Typography */
  --google-font: 'Roboto', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Shadows */
  --shadow-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
  --shadow-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
  --shadow-4: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.25s ease-in-out;
  --transition-slow: 0.35s ease-in-out;
}

/* Global Styles */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--google-font);
  background-color: var(--google-gray-50);
  color: var(--google-gray-900);
  line-height: 1.6;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.2;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--google-gray-900);
}

h1 { font-size: 2.125rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--google-gray-700);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  border: none;
  margin-bottom: var(--spacing-lg);
  transition: box-shadow var(--transition-normal);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-2);
}

.card-header {
  background: white;
  border-bottom: 1px solid var(--google-gray-200);
  padding: var(--spacing-lg);
  font-weight: 500;
  color: var(--google-gray-900);
  font-size: 1.125rem;
}

.card-body {
  padding: var(--spacing-lg);
}

.card-footer {
  background: var(--google-gray-50);
  border-top: 1px solid var(--google-gray-200);
  padding: var(--spacing-md) var(--spacing-lg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 36px;
  gap: var(--spacing-xs);
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--google-blue-light);
}

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

.btn-primary:hover {
  background-color: var(--google-blue-dark);
  box-shadow: var(--shadow-2);
}

.btn-secondary {
  background-color: var(--google-gray-200);
  color: var(--google-gray-700);
}

.btn-secondary:hover {
  background-color: var(--google-gray-300);
}

.btn-success {
  background-color: var(--google-green);
  color: white;
}

.btn-success:hover {
  background-color: #2d8a47;
}

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

.btn-danger:hover {
  background-color: #d33426;
}

.btn-warning {
  background-color: var(--google-yellow);
  color: var(--google-gray-900);
}

.btn-warning:hover {
  background-color: #f0b400;
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--google-gray-300);
  color: var(--google-gray-700);
}

.btn-outline:hover {
  background-color: var(--google-gray-50);
  border-color: var(--google-gray-400);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.75rem;
  min-height: 28px;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  min-height: 48px;
}

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

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

.form-control {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--google-gray-300);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  background-color: white;
}

.form-control:focus {
  outline: none;
  border-color: var(--google-blue);
  box-shadow: 0 0 0 2px var(--google-blue-light);
}

.form-control:disabled {
  background-color: var(--google-gray-100);
  color: var(--google-gray-500);
  cursor: not-allowed;
}

.form-text {
  font-size: 0.75rem;
  color: var(--google-gray-600);
  margin-top: var(--spacing-xs);
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.table th {
  background-color: var(--google-gray-50);
  color: var(--google-gray-700);
  font-weight: 500;
  text-align: left;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--google-gray-200);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--google-gray-100);
  color: var(--google-gray-900);
}

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

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

/* Navigation */
.navbar {
  background: white;
  box-shadow: var(--shadow-1);
  border-bottom: 1px solid var(--google-gray-200);
  padding: var(--spacing-md) 0;
}

.navbar-brand {
  font-weight: 500;
  color: var(--google-blue);
  text-decoration: none;
  font-size: 1.25rem;
}

.navbar-nav .nav-link {
  color: var(--google-gray-700);
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.navbar-nav .nav-link:hover {
  background-color: var(--google-gray-100);
  color: var(--google-gray-900);
}

.navbar-nav .nav-link.active {
  background-color: var(--google-blue-light);
  color: var(--google-blue);
}

/* Dropdown Menu Styles */
.dropdown-menu {
  background: white;
  border: 1px solid var(--google-gray-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  padding: var(--spacing-xs) 0;
  margin-top: var(--spacing-xs);
  min-width: 200px;
}

.dropdown-item {
  color: var(--google-gray-700);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  display: flex;
  align-items: center;
  transition: background-color var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

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

.dropdown-item:focus {
  background-color: var(--google-blue-light);
  color: var(--google-blue);
  outline: none;
}

.dropdown-divider {
  border-top: 1px solid var(--google-gray-200);
  margin: var(--spacing-xs) 0;
}

/* User dropdown specific styles */
.navbar-nav .dropdown-toggle::after {
  margin-left: var(--spacing-sm);
  vertical-align: middle;
}

.navbar-nav .dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}



/* Sidebar */
.sidebar {
  background: white;
  box-shadow: var(--shadow-2);
  border-right: 1px solid var(--google-gray-200);
}

.sidebar .nav-link {
  color: var(--google-gray-700);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin: var(--spacing-xs) var(--spacing-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.sidebar .nav-link:hover {
  background-color: var(--google-gray-100);
  color: var(--google-gray-900);
}

.sidebar .nav-link.active {
  background-color: var(--google-blue-light);
  color: var(--google-blue);
  font-weight: 500;
}

/* Alerts */
.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  border: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.alert-success {
  background-color: #e6f4ea;
  color: #1e4620;
}

.alert-warning {
  background-color: #fff3e0;
  color: #e65100;
}

.alert-danger {
  background-color: #fce8e6;
  color: #c5221f;
}

.alert-info {
  background-color: #e8f0fe;
  color: #174ea6;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background-color: var(--google-blue-light);
  color: var(--google-blue);
}

.badge-success {
  background-color: #e6f4ea;
  color: var(--google-green);
}

.badge-warning {
  background-color: #fff3e0;
  color: var(--google-yellow);
}

.badge-danger {
  background-color: #fce8e6;
  color: var(--google-red);
}

/* Pagination */
.pagination {
  display: flex;
  list-style: none;
  padding: 0;
  margin: var(--spacing-lg) 0;
  gap: var(--spacing-xs);
}

.page-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: var(--spacing-sm);
  border: 1px solid var(--google-gray-300);
  border-radius: var(--radius-md);
  color: var(--google-gray-700);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.page-link:hover {
  background-color: var(--google-gray-100);
  border-color: var(--google-gray-400);
}

.page-item.active .page-link {
  background-color: var(--google-blue);
  border-color: var(--google-blue);
  color: white;
}

/* Dashboard Cards */
.dashboard-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  transition: box-shadow var(--transition-normal);
}

.dashboard-card:hover {
  box-shadow: var(--shadow-2);
}

.dashboard-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.dashboard-card-title {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--google-gray-900);
  margin: 0;
}

.dashboard-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
}

.dashboard-card-icon.primary {
  background-color: var(--google-blue);
}

.dashboard-card-icon.success {
  background-color: var(--google-green);
}

.dashboard-card-icon.warning {
  background-color: var(--google-yellow);
}

.dashboard-card-icon.danger {
  background-color: var(--google-red);
}

.dashboard-card-icon.info {
  background-color: var(--google-blue);
}

/* 새로운 색상 클래스들 추가 */
.dashboard-card-icon.purple {
  background-color: #8e24aa; /* 보라색 */
}

.dashboard-card-icon.teal {
  background-color: #00695c; /* 청록색 */
}

.dashboard-card-icon.orange {
  background-color: #f57c00; /* 주황색 */
}

.dashboard-card-value {
  font-size: 2rem;
  font-weight: 300;
  color: var(--google-gray-900);
  margin: var(--spacing-sm) 0;
}

.dashboard-card-description {
  color: var(--google-gray-600);
  font-size: 0.875rem;
  margin: 0;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .card-body {
    padding: var(--spacing-md);
  }
  
  .dashboard-card {
    padding: var(--spacing-lg);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .table-responsive {
    overflow-x: auto;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }
.d-block { display: block; }
.d-none { display: none; }

.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-end { justify-content: flex-end; }

.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.align-items-end { align-items: flex-end; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

/* Loading Spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--google-gray-300);
  border-top: 2px solid var(--google-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--google-gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--google-gray-400);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--google-gray-500);
}