:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --light-color: #f8fafc;
    --dark-color: #1f2937;
    --border-radius: 16px;
    --border-radius-sm: 10px;
    --box-shadow: 0 8px 25px -8px rgba(0, 0, 0, 0.15);
    --box-shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: #374151;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
}

/* Enhanced Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.6rem !important;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

/* Enhanced Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--box-shadow-lg);
}

.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(229, 231, 235, 0.6);
    padding: 1.5rem 2rem;
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
    backdrop-filter: blur(10px);
}

/* Enhanced Stat Cards */
.stat-card {
    border-radius: var(--border-radius);
    border: none;
    color: white;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--gradient-primary);
    min-height: 140px;
}

.stat-card:hover {
    transform: translateY(-8px) rotateX(5deg);
    box-shadow: var(--box-shadow-lg);
}

.stat-card.success {
    background: var(--gradient-success);
}

.stat-card.warning {
    background: var(--gradient-warning);
}

.stat-card.danger {
    background: var(--gradient-danger);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(30px, -30px);
    transition: all 0.4s ease;
}

.stat-card:hover::before {
    transform: translate(0, 0) scale(1.2);
}

.stat-card .card-body {
    position: relative;
    z-index: 2;
    padding: 1.5rem;
}

.stat-card .card-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-card .card-text {
    font-size: 0.95rem;
    opacity: 0.95;
    margin-bottom: 0;
    font-weight: 500;
}

.stat-card i {
    font-size: 2.5rem;
    opacity: 0.9;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

/* Enhanced Form Styles */
.form-control {
    border: 2px solid #e5e7eb;
    border-radius: var(--border-radius-sm);
    padding: 0.875rem 1.25rem;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
    background: white;
    transform: translateY(-2px);
}

.form-label {
    font-weight: 600;
    color: #374151;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

/* Enhanced Button Styles */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    padding: 0.875rem 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::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 0.5s;
}

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

.btn-primary {
    background: var(--gradient-primary);
    border-color: transparent;
}

.btn-primary:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
}

/* Enhanced Table Styles */
.table {
    margin-bottom: 0;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.table th {
    border-top: none;
    font-weight: 700;
    color: #6b7280;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 1.25rem 1rem;
    border-bottom: 2px solid #e5e7eb;
}

.table td {
    padding: 1.25rem 1rem;
    vertical-align: middle;
    border-color: #f3f4f6;
    transition: all 0.3s ease;
}

.table-hover tbody tr {
    transition: all 0.3s ease;
}

.table-hover tbody tr:hover {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    transform: scale(1.01);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* Enhanced Link Items */
.link-item {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(229, 231, 235, 0.6);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 1.25rem;
    backdrop-filter: blur(10px);
}

.link-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow);
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.95);
}

.link-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 12px;
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.link-item:hover .link-icon {
    background: var(--gradient-primary);
    transform: scale(1.1) rotate(5deg);
    color: white;
}

/* Enhanced Animations */
.fade-in {
    animation: fadeIn 0.8s ease-in-out;
}

.slide-up {
    animation: slideUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Floating Animation */
.floating {
    animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Glass Morphism */
.glass-effect {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* Mobile Responsive Enhancements */
@media (max-width: 768px) {
    .container {
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .stat-card .card-body {
        padding: 1.75rem;
    }
    
    .link-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding: 1.25rem;
    }
    
    .link-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .navbar-brand {
        font-size: 1.4rem !important;
    }
    
    .stat-card .card-title {
        font-size: 1.75rem;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.75rem;
    }
}

@media (max-width: 576px) {
    .row.g-3 > [class*="col-"] {
        margin-bottom: 1.25rem;
    }
    
    .link-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .link-actions .btn {
        width: 100%;
    }
    
    .table-responsive {
        font-size: 0.8rem;
        border-radius: var(--border-radius-sm);
        overflow: hidden;
    }
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
        color: #f3f4f6;
    }
    
    .card {
        background: rgba(31, 41, 55, 0.8);
        border-color: rgba(55, 65, 81, 0.5);
    }
    
    .form-control {
        background: rgba(55, 65, 81, 0.8);
        border-color: #4b5563;
        color: #f3f4f6;
    }
    
    .link-item {
        background: rgba(31, 41, 55, 0.8);
        border-color: rgba(55, 65, 81, 0.5);
    }
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}