/* Modern 2026 UI Enhancement - Professional & Contemporary Design */

/* Advanced CSS Variables for 2026 Design System */
:root {
    /* 2026 Color Palette - Sophisticated & Modern */
    --primary-2026: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-2026: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-2026: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-2026: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --warning-2026: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --danger-2026: linear-gradient(135deg, #ff758c 0%, #ff7eb3 100%);
    
    /* Neural Network Inspired Colors */
    --neural-primary: #6366f1;
    --neural-secondary: #8b5cf6;
    --neural-accent: #06b6d4;
    --neural-success: #10b981;
    --neural-warning: #f59e0b;
    --neural-danger: #ef4444;
    
    /* Glass Morphism Effects */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --glass-backdrop: blur(20px);
    
    /* Advanced Shadows - Multi-layered */
    --shadow-neural: 0 4px 15px 0 rgba(99, 102, 241, 0.4);
    --shadow-elevated: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-floating: 0 10px 25px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-inset: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* Typography Scale - 2026 */
    --font-display: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', 'SF Pro Text', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
    
    /* Spacing System - Golden Ratio Based */
    --space-xs: 0.25rem;    /* 4px */
    --space-sm: 0.5rem;     /* 8px */
    --space-md: 0.75rem;    /* 12px */
    --space-lg: 1rem;       /* 16px */
    --space-xl: 1.5rem;     /* 24px */
    --space-2xl: 2rem;      /* 32px */
    --space-3xl: 3rem;      /* 48px */
    --space-4xl: 4rem;      /* 64px */
    
    /* Border Radius - Organic Curves */
    --radius-2026-sm: 12px;
    --radius-2026-md: 16px;
    --radius-2026-lg: 24px;
    --radius-2026-xl: 32px;
    --radius-2026-full: 9999px;
    
    /* Animation Curves - Natural Motion */
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Transition Durations */
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 400ms;
    --duration-slower: 600ms;
}

/* Enhanced Body with Neural Network Background */
body {
    font-family: var(--font-body);
    background: 
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.05) 0%, transparent 50%),
        linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    background-attachment: fixed;
    line-height: 1.7;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Advanced Card Design - 2026 Style */
.card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-2026-lg);
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04);
    transition: all var(--duration-normal) var(--ease-smooth);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-smooth);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--primary-2026);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-smooth);
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 32px 64px -12px rgba(0, 0, 0, 0.25),
        0 25px 50px -12px rgba(99, 102, 241, 0.15);
}

.card:hover::before {
    opacity: 1;
}

/* Neural Network Card Header */
.card-header {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.9) 0%, 
        rgba(248, 250, 252, 0.9) 100%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    padding: var(--space-2xl);
    font-weight: 600;
    font-size: 1.125rem;
    color: #1e293b;
    position: relative;
}

.card-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--space-2xl);
    right: var(--space-2xl);
    height: 2px;
    background: var(--primary-2026);
    border-radius: var(--radius-2026-full);
    transform: scaleX(0);
    transition: transform var(--duration-normal) var(--ease-spring);
}

.card:hover .card-header::after {
    transform: scaleX(1);
}

/* Advanced Table Design */
.table {
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--radius-2026-lg);
    overflow: hidden;
    box-shadow: var(--shadow-floating);
    backdrop-filter: blur(4px);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.table thead th {
    background: var(--primary-2026);
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-xl) var(--space-lg);
    border: none;
    position: relative;
}

.table thead th::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.5) 50%,
        rgba(255, 255, 255, 0) 100%);
}

.table tbody td {
    padding: var(--space-xl) var(--space-lg);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    vertical-align: middle;
    transition: all var(--duration-fast) var(--ease-smooth);
}

.table tbody tr {
    transition: all var(--duration-fast) var(--ease-smooth);
}

.table tbody tr:hover {
    background: linear-gradient(135deg, 
        rgba(99, 102, 241, 0.05) 0%, 
        rgba(139, 92, 246, 0.05) 100%);
    transform: translateX(4px);
    box-shadow: 
        4px 0 0 0 var(--neural-primary),
        var(--shadow-floating);
}

/* Next-Gen Button Design */
.btn {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.875rem;
    padding: var(--space-md) var(--space-2xl);
    border-radius: var(--radius-2026-md);
    border: none;
    position: relative;
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-smooth);
    text-transform: none;
    letter-spacing: 0.025em;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.4) 50%, 
        transparent 100%);
    transition: left var(--duration-slow) var(--ease-smooth);
}

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

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

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

.btn-primary {
    background: var(--primary-2026);
    color: white;
    box-shadow: var(--shadow-neural);
}

.btn-success {
    background: var(--success-2026);
    color: white;
    box-shadow: 0 4px 15px 0 rgba(16, 185, 129, 0.4);
}

.btn-warning {
    background: var(--warning-2026);
    color: white;
    box-shadow: 0 4px 15px 0 rgba(245, 158, 11, 0.4);
}

.btn-danger {
    background: var(--danger-2026);
    color: white;
    box-shadow: 0 4px 15px 0 rgba(239, 68, 68, 0.4);
}

.btn-info {
    background: var(--accent-2026);
    color: white;
    box-shadow: 0 4px 15px 0 rgba(6, 182, 212, 0.4);
}

/* Advanced Form Controls */
.form-control, .form-select {
    font-family: var(--font-body);
    border: 2px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--radius-2026-md);
    padding: var(--space-lg) var(--space-xl);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(3px);
    font-size: 1rem;
    transition: all var(--duration-normal) var(--ease-smooth);
    box-shadow: var(--shadow-inset);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.form-control:focus, .form-select:focus {
    border-color: var(--neural-primary);
    box-shadow: 
        var(--shadow-inset),
        0 0 0 4px rgba(99, 102, 241, 0.1),
        var(--shadow-neural);
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 1);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: #374151;
    margin-bottom: var(--space-sm);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Floating Label Enhancement */
.form-floating {
    position: relative;
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label {
    transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
    color: var(--neural-primary);
    font-weight: 600;
}

/* Advanced Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(4px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: all var(--duration-normal) var(--ease-smooth);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.navbar-brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    background: var(--primary-2026);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform var(--duration-normal) var(--ease-bounce);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    color: #64748b !important;
    padding: var(--space-md) var(--space-lg) !important;
    border-radius: var(--radius-2026-sm);
    transition: all var(--duration-fast) var(--ease-smooth);
    position: relative;
    margin: 0 var(--space-xs);
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-2026);
    border-radius: var(--radius-2026-full);
    transition: all var(--duration-normal) var(--ease-spring);
    transform: translateX(-50%);
}

.nav-link:hover,
.nav-link.active {
    color: var(--neural-primary) !important;
    background: rgba(99, 102, 241, 0.1);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 80%;
}

/* Modal Enhancements */
.modal-content {
    border: none;
    border-radius: var(--radius-2026-xl);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(4px);
    box-shadow: var(--shadow-elevated);
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.modal-header {
    background: linear-gradient(135deg, 
        rgba(248, 250, 252, 0.9) 0%, 
        rgba(241, 245, 249, 0.9) 100%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    padding: var(--space-2xl);
}

.modal-title {
    font-family: var(--font-display);
    font-weight: 600;
    color: #1e293b;
}

.modal-body {
    padding: var(--space-2xl);
}

.modal-footer {
    background: linear-gradient(135deg, 
        rgba(248, 250, 252, 0.9) 0%, 
        rgba(241, 245, 249, 0.9) 100%);
    border-top: 1px solid rgba(226, 232, 240, 0.8);
    padding: var(--space-2xl);
}

/* Advanced Animations */
@keyframes neuralPulse {
    0%, 100% { 
        opacity: 1; 
        transform: scale(1);
    }
    50% { 
        opacity: 0.8; 
        transform: scale(1.05);
    }
}

@keyframes floatUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animation Classes */
.animate-float-up {
    animation: floatUp var(--duration-slower) var(--ease-spring);
}

.animate-slide-in-right {
    animation: slideInRight var(--duration-normal) var(--ease-smooth);
}

.animate-neural-pulse {
    animation: neuralPulse 2s var(--ease-smooth) infinite;
}

/* Loading States */
.loading-2026 {
    position: relative;
    overflow: hidden;
}

.loading-2026::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(99, 102, 241, 0.2) 50%, 
        transparent 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Responsive Enhancements */
@media (max-width: 768px) {
    .card {
        border-radius: var(--radius-2026-md);
        margin-bottom: var(--space-lg);
    }
    
    .card-header {
        padding: var(--space-xl);
    }
    
    .btn {
        padding: var(--space-md) var(--space-xl);
        font-size: 0.8125rem;
    }
    
    .table thead th,
    .table tbody td {
        padding: var(--space-md) var(--space-sm);
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --glass-bg: rgba(0, 0, 0, 0.2);
        --glass-border: rgba(255, 255, 255, 0.1);
    }
    
    body {
        background: 
            radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
            radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
            linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    }
    
    .card {
        background: rgba(30, 41, 59, 0.95);
        border-color: rgba(71, 85, 105, 0.3);
    }
    
    .navbar {
        background: rgba(15, 23, 42, 0.95) !important;
        border-bottom-color: rgba(71, 85, 105, 0.3);
    }
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .card {
        border-width: 2px;
        border-color: #000;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .form-control, .form-select {
        border-width: 2px;
        border-color: #000;
    }
}

/* Print Optimizations */
@media print {
    .card {
        background: white !important;
        box-shadow: none !important;
        border: 1px solid #000 !important;
    }
    
    .btn {
        background: white !important;
        color: #000 !important;
        border: 1px solid #000 !important;
    }
}