/* ============================================================================
   MODERN DASHBOARD DESIGN SYSTEM
   Enhanced UI for SaaS Admin Portal and Tenant Dashboard
   ============================================================================ */

/* Fonts are loaded from layout <head> to avoid @import waterfalls. */

:root {
  /* Modern Color Palette */
  --primary-brand: #3b82f6;
  --primary-brand-dark: #2563eb;
  --primary-brand-light: #60a5fa;
  --secondary-brand: #8b5cf6;
  --accent-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --info-color: #06b6d4;
  
  /* Neutral Colors */
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;
  
  /* Surface Colors */
  --surface-primary: #ffffff;
  --surface-secondary: #f8fafc;
  --surface-tertiary: #f1f5f9;
  
  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --text-inverse: #ffffff;
  
  /* Border Colors */
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-dark: #94a3b8;
  
  /* Shadow Styles */
  --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);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================================
   GLOBAL BASE STYLES
   ============================================================================ */

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--surface-tertiary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================================================
   HEADER & TOPBAR MODERNIZATION
   ============================================================================ */

.header {
  background: var(--surface-primary);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.navbar {
  background: var(--surface-primary);
  border: none;
  margin-bottom: 0;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary) !important;
}

.navbar-brand img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.navbar-nav > li > a {
  color: var(--text-secondary) !important;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.navbar-nav > li > a:hover,
.navbar-nav > li > a:focus {
  color: var(--text-primary) !important;
  background: transparent !important;
}

/* ============================================================================
   SIDEBAR MODERNIZATION
   ============================================================================ */

.left-side {
  background: var(--surface-primary);
  border-right: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.sidebar-menu {
  list-style: none;
  padding: var(--spacing-md);
  margin: 0;
}

.sidebar-menu > li {
  margin-bottom: var(--spacing-xs);
}

.sidebar-menu > li > a {
  display: flex;
  align-items: center;
  padding: 0.75rem var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-base);
  text-decoration: none;
}

.sidebar-menu > li > a:hover {
  background: var(--surface-secondary);
  color: var(--text-primary);
}

.sidebar-menu > li.active > a {
  background: linear-gradient(135deg, var(--primary-brand), var(--primary-brand-light));
  color: var(--text-inverse);
  box-shadow: var(--shadow-md);
}

.sidebar-menu > li > a > i {
  margin-right: 0.75rem;
  width: 1.25rem;
  text-align: center;
  font-size: 1.125rem;
}

/* ============================================================================
   MAIN CONTENT AREA
   ============================================================================ */

.right-side {
  background: var(--surface-tertiary);
  margin-left: 220px;
  min-height: 100vh;
}

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

/* ============================================================================
   BOX & CARD COMPONENTS
   ============================================================================ */

.box {
  background: var(--surface-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-lg);
  transition: box-shadow var(--transition-base);
}

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

.box-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  background: var(--surface-secondary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.box-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.box-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--surface-secondary);
  border-top: 1px solid var(--border-light);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ============================================================================
   SMALL BOX STATS (Dashboard Cards)
   ============================================================================ */

.small-box {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: var(--shadow-md);
}

.small-box:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.small-box .small-box-footer {
  display: block;
  padding: var(--spacing-lg);
  color: var(--text-inverse);
  text-decoration: none;
  position: relative;
  background: linear-gradient(135deg, var(--primary-brand), var(--primary-brand-dark));
}

.small-box .inner {
  padding: var(--spacing-lg);
  color: var(--text-inverse);
}

.small-box .inner h3 {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0 0 var(--spacing-sm) 0;
  line-height: 1;
}

.small-box .inner p {
  font-size: 1rem;
  font-weight: 500;
  margin: 0;
  opacity: 0.95;
}

.small-box .icon {
  position: absolute;
  top: 50%;
  right: var(--spacing-lg);
  transform: translateY(-50%);
  font-size: 4rem;
  opacity: 0.3;
}

/* Color Variants for Small Boxes */
.bg-teal-light .small-box-footer,
.bg-teal-light {
  background: linear-gradient(135deg, #14b8a6, #0d9488);
}

.bg-purple-light .small-box-footer,
.bg-purple-light {
  background: linear-gradient(135deg, #a855f7, #9333ea);
}

.bg-orange-dark .small-box-footer,
.bg-orange-dark {
  background: linear-gradient(135deg, #f97316, #ea580c);
}

.bg-pink .small-box-footer,
.bg-pink {
  background: linear-gradient(135deg, #ec4899, #db2777);
}

.bg-blue .small-box-footer,
.bg-blue {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.bg-green .small-box-footer,
.bg-green {
  background: linear-gradient(135deg, #10b981, #059669);
}

/* ============================================================================
   BUTTONS MODERNIZATION
   ============================================================================ */

.btn {
  border-radius: var(--radius-md);
  font-weight: 600;
  padding: 0.625rem 1.25rem;
  transition: all var(--transition-base);
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-brand), var(--primary-brand-dark));
  color: var(--text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-brand-dark), var(--primary-brand));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: var(--text-inverse);
}

.btn-info {
  background: linear-gradient(135deg, #06b6d4, #0891b2);
  color: var(--text-inverse);
}

.btn-warning {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: var(--text-inverse);
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: var(--text-inverse);
}

.btn-default {
  background: var(--surface-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.btn-default:hover {
  background: var(--surface-secondary);
  border-color: var(--border-dark);
}

/* ============================================================================
   TABLES MODERNIZATION
   ============================================================================ */

.table {
  background: var(--surface-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table thead {
  background: var(--surface-secondary);
}

.table thead th {
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: var(--spacing-md);
  border-bottom: 2px solid var(--border-medium);
}

.table tbody td {
  padding: var(--spacing-md);
  vertical-align: middle;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
}

.table tbody tr:hover {
  background: var(--surface-secondary);
}

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

/* ============================================================================
   FORMS MODERNIZATION
   ============================================================================ */

.form-control {
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 0.625rem var(--spacing-md);
  font-size: 1rem;
  transition: all var(--transition-fast);
  background: var(--surface-primary);
  color: var(--text-primary);
}

.form-control:focus {
  border-color: var(--primary-brand);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  outline: none;
}

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

.form-group label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  display: block;
}

/* ============================================================================
   FOOTER MODERNIZATION
   ============================================================================ */

.main-footer {
  background: var(--surface-primary);
  border-top: 1px solid var(--border-light);
  padding: var(--spacing-lg);
  margin-top: auto;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-col {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-academic-line {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-weight: 500;
}

.footer-academic-days {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--accent-color);
  color: var(--text-inverse);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

/* ============================================================================
   ALERTS & NOTIFICATIONS
   ============================================================================ */

.alert {
  border-radius: var(--radius-md);
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.alert-success {
  background: #d1fae5;
  color: #065f46;
}

.alert-info {
  background: #dbeafe;
  color: #1e40af;
}

.alert-warning {
  background: #fef3c7;
  color: #92400e;
}

.alert-danger {
  background: #fee2e2;
  color: #991b1b;
}

/* ============================================================================
   BADGES & LABELS
   ============================================================================ */

.badge,
.label {
  border-radius: var(--radius-full);
  padding: 0.25rem 0.75rem;
  font-weight: 600;
  font-size: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.badge-primary,
.label-primary {
  background: var(--primary-brand);
  color: var(--text-inverse);
}

.badge-success,
.label-success {
  background: var(--accent-color);
  color: var(--text-inverse);
}

.badge-warning,
.label-warning {
  background: var(--warning-color);
  color: var(--text-inverse);
}

.badge-danger,
.label-danger {
  background: var(--danger-color);
  color: var(--text-inverse);
}

.badge-info,
.label-info {
  background: var(--info-color);
  color: var(--text-inverse);
}

/* ============================================================================
   PAGINATION
   ============================================================================ */

.pagination {
  display: flex;
  gap: var(--spacing-xs);
}

.pagination > li > a {
  border-radius: var(--radius-md);
  padding: 0.5rem 0.75rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

.pagination > li > a:hover {
  background: var(--primary-brand);
  color: var(--text-inverse);
  border-color: var(--primary-brand);
}

.pagination > .active > a {
  background: var(--primary-brand);
  color: var(--text-inverse);
  border-color: var(--primary-brand);
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 992px) {
  .right-side {
    margin-left: 0;
  }
  
  .left-side {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }
  
  .left-side.open {
    transform: translateX(0);
  }
  
  .content {
    padding: var(--spacing-md);
  }
  
  .footer-row {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .small-box .inner h3 {
    font-size: 2rem;
  }
  
  .small-box .icon {
    font-size: 3rem;
  }
  
  .box-header {
    padding: var(--spacing-md);
  }
  
  .box-body {
    padding: var(--spacing-md);
  }
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

.text-white {
  color: var(--text-inverse) !important;
}

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

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

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

.rounded { border-radius: var(--radius-md) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-full { border-radius: var(--radius-full) !important; }

.shadow { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }
