/* ============================================
   MODERN GLASSMORPHISM DESIGN SYSTEM
   Responsive & Mobile-First
   ============================================ */

:root {
  /* Default Colors (Admin) */
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #ec4899;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
  
  /* Dark Mode */
  --dark-bg: #0f172a;
  --dark-card: rgba(15, 23, 42, 0.8);
  --dark-text: #f1f5f9;
  --dark-text-secondary: #cbd5e1;
  
  /* Light Mode */
  --light-bg: #f8fafc;
  --light-card: rgba(255, 255, 255, 0.9);
  --light-text: #1e293b;
  --light-text-secondary: #64748b;
  
  /* 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: 1rem;
  --radius-xl: 1.5rem;
  
  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, var(--light-bg) 0%, #f1f5f9 100%);
  color: var(--light-text);
  line-height: 1.6;
  transition: var(--transition);
}

body.dark-mode {
  background: linear-gradient(135deg, var(--dark-bg) 0%, #1a1f35 100%);
  color: var(--dark-text);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(1.875rem, 5vw, 2.25rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 1.875rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
}

h4 {
  font-size: 1.125rem;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--light-text-secondary);
}

body.dark-mode p {
  color: var(--dark-text-secondary);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.btn:active {
  transform: translateY(0);
}

/* Button Variants */
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 12px 24px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary) 0%, #be185d 100%);
  color: white;
  box-shadow: 0 8px 16px rgba(236, 72, 153, 0.3);
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: white;
  box-shadow: 0 8px 16px rgba(16, 185, 129, 0.3);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
  color: white;
  box-shadow: 0 8px 16px rgba(239, 68, 68, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

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

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

.btn-block {
  width: 100%;
}

/* ============================================
   CARDS & CONTAINERS
   ============================================ */

.card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--glass-shadow);
  transition: var(--transition);
}

body.dark-mode .card {
  background: var(--dark-card);
  border-color: rgba(255, 255, 255, 0.1);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(31, 38, 135, 0.2);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--glass-border);
}

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

.card-footer {
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--glass-border);
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

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

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

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--light-text);
}

body.dark-mode .form-label {
  color: var(--dark-text);
}

.form-control,
.form-select,
textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  font-family: inherit;
  font-size: 0.875rem;
  color: var(--light-text);
  transition: var(--transition);
}

body.dark-mode .form-control,
body.dark-mode .form-select,
body.dark-mode textarea {
  background: rgba(255, 255, 255, 0.05);
  color: var(--dark-text);
  border-color: rgba(255, 255, 255, 0.1);
}

.form-control:focus,
.form-select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  background: rgba(255, 255, 255, 0.8);
}

body.dark-mode .form-control:focus,
body.dark-mode .form-select:focus,
body.dark-mode textarea:focus {
  background: rgba(255, 255, 255, 0.1);
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
  backdrop-filter: blur(10px);
  margin-bottom: var(--spacing-lg);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--success);
  color: var(--success);
}

.alert-danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  color: var(--danger);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--warning);
  color: var(--warning);
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--info);
  color: var(--info);
}

/* ============================================
   BADGES
   ============================================ */

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--primary);
  color: white;
}

.badge-success {
  background: var(--success);
}

.badge-danger {
  background: var(--danger);
}

.badge-warning {
  background: var(--warning);
}

/* ============================================
   RESPONSIVE GRID
   ============================================ */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.col-1 { grid-column: span 1; }
.col-2 { grid-column: span 2; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-12 { grid-column: span 12; }

/* ============================================
   MOBILE RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
  :root {
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
  }
  
  .card {
    padding: var(--spacing-md);
  }
  
  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
  }
  
  .row {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .col-md-6,
  .col-md-8,
  .col-md-4 {
    grid-column: span 1;
  }
  
  h1 {
    font-size: 1.5rem;
  }
  
  h2 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
  }
  
  .card {
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
  }
  
  .btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  h1 {
    font-size: 1.25rem;
  }
}

/* ============================================
   UTILITIES
   ============================================ */

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

.text-right {
  text-align: right;
}

.text-muted {
  color: var(--light-text-secondary);
}

body.dark-mode .text-muted {
  color: var(--dark-text-secondary);
}

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

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

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

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

.flex {
  display: flex;
}

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

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

.rounded {
  border-radius: var(--radius-lg);
}

.shadow {
  box-shadow: var(--glass-shadow);
}

.opacity-50 {
  opacity: 0.5;
}

.opacity-75 {
  opacity: 0.75;
}

.hidden {
  display: none;
}

.visible {
  display: block;
}