/* Enhanced Design System */
:root {
  /* Primary Colors */
  --primary-blue: #007bff;
  --primary-blue-dark: #0056b3;
  --primary-blue-light: #66b3ff;
  
  /* Success Colors */
  --success-green: #28a745;
  --success-green-dark: #20c997;
  --success-green-light: #5cbf6a;
  
  /* Neutral Colors */
  --gray-50: #f8f9fa;
  --gray-100: #e9ecef;
  --gray-200: #dee2e6;
  --gray-300: #ced4da;
  --gray-500: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #2c3e50;
  
  /* Semantic Colors */
  --warning-yellow: #ffc107;
  --warning-yellow-dark: #e0a800;
  --danger-red: #dc3545;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
  --gradient-success: linear-gradient(135deg, var(--success-green), var(--success-green-dark));
  --gradient-warning: linear-gradient(135deg, var(--warning-yellow), var(--warning-yellow-dark));
  --gradient-background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 25px rgba(0,0,0,0.15);
  --shadow-xl: 0 12px 30px rgba(0,0,0,0.2);
  --shadow-primary: 0 8px 25px rgba(0,123,255,0.4);
  --shadow-success: 0 8px 25px rgba(40,167,69,0.4);
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 50px;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 2.5rem;
  --space-3xl: 3rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Typography */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
}

/* Reusable UI Components */

/* Modern Form Controls */
.form-control-modern {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    transition: all var(--transition-normal);
    background: white;
    font-family: inherit;
    color: var(--gray-800);
}

.form-control-modern:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
    transform: translateY(-1px);
}

.form-control-modern:hover:not(:focus) {
    border-color: var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.form-control-modern::placeholder {
    color: var(--gray-500);
    font-weight: var(--font-weight-normal);
}

.form-label-modern {
    font-size: 1.1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--gray-900);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    line-height: var(--line-height-tight);
}

.form-label-modern i {
    color: var(--primary-blue);
    font-size: 1.1em;
}

.form-help {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: var(--space-sm);
    line-height: var(--line-height-normal);
}

/* Modern Buttons */
.btn-modern {
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    min-width: 140px;
    justify-content: center;
    text-decoration: none;
    line-height: var(--line-height-tight);
    position: relative;
    overflow: hidden;
}

.btn-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s ease;
}

.btn-modern:hover::before {
    left: 100%;
}

.btn-modern:hover {
    transform: translateY(-2px);
    text-decoration: none;
}

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

.btn-modern:disabled {
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
    opacity: 0.6;
}

.btn-primary-modern {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary-modern:hover {
    box-shadow: var(--shadow-primary);
    color: white;
}

.btn-secondary-modern {
    background: var(--gray-500);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary-modern:hover {
    background: var(--gray-700);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-success-modern {
    background: var(--gradient-success);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-success-modern:hover {
    box-shadow: var(--shadow-success);
    color: white;
}

/* Pulse animation for CTAs */
.btn-modern.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0,123,255,0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0,123,255,0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0,123,255,0);
    }
}

/* Card Components */
.card-modern {
    background: white;
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.card-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.card-modern:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--gray-200);
}

.card-modern:hover::before {
    transform: scaleX(1);
}

.card-modern.featured {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, #f8f9ff, #e3f2fd);
}

.card-modern.featured::before {
    transform: scaleX(1);
}

/* Icon Containers */
.icon-container {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    position: relative;
    overflow: hidden;
}

.icon-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background: inherit;
    filter: brightness(1.1);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.icon-container:hover::before {
    opacity: 1;
}

.icon-container.primary {
    background: var(--gradient-primary);
    color: white;
}

.icon-container.success {
    background: var(--gradient-success);
    color: white;
}

.icon-container.warning {
    background: var(--gradient-warning);
    color: white;
}

/* Badges */
.badge-modern {
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

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

.badge-primary {
    background: var(--gradient-primary);
    color: white;
}

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

/* Loading States */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
    opacity: 0;
    animation: fadeIn var(--transition-normal) forwards;
}

.loading-content {
    background: white;
    padding: var(--space-3xl);
    border-radius: var(--radius-2xl);
    text-align: center;
    box-shadow: var(--shadow-xl);
    max-width: 400px;
    margin: var(--space-xl);
    transform: scale(0.9);
    animation: scaleIn var(--transition-normal) forwards;
}

@keyframes scaleIn {
    to {
        transform: scale(1);
    }
}

.loading-spinner {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: var(--space-lg);
}

/* Enhanced Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

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

@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.fade-in-up {
    animation: fadeInUp var(--transition-slow) ease;
}

.bounce-in {
    animation: bounceIn 0.6s ease;
}

.fa-spinner {
    animation: spin 1s linear infinite;
}

/* Grid Utilities */
.grid-auto-fit {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.grid-auto-fit.small {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.grid-auto-fit.large {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Enhanced Focus States */
.focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Responsive utilities */
@media (max-width: 768px) {
    .btn-modern {
        width: 100%;
        justify-content: center;
    }
    
    .grid-auto-fit {
        grid-template-columns: 1fr;
    }
    
    .card-modern {
        padding: var(--space-lg);
    }
    
    .loading-content {
        padding: var(--space-xl);
        margin: var(--space-md);
    }
}

/* Utility Classes */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

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

.position-relative { position: relative; }
.position-absolute { position: absolute; }

.overflow-hidden { overflow: hidden; }

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection styling */
::selection {
    background: rgba(0,123,255,0.2);
    color: var(--gray-900);
}