:root {
    --bs-primary: #3366CC;
    --bs-primary-rgb: 51, 102, 204;
    --datanalytics-blue: #3366CC;
    --datanalytics-blue-dark: #2851A3;
    --datanalytics-blue-light: #4A7BD8;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

body {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #374151;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar-brand {
    font-size: 1.25rem;
    font-family: 'Montserrat', sans-serif;
}

.navbar-brand svg {
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.card {
    border: none;
    box-shadow: var(--shadow);
    border-radius: 0.75rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    background-color: #f8fafc;
    border-bottom: 1px solid #e5e7eb;
    font-weight: 600;
    font-family: 'Montserrat', sans-serif;
}

.btn {
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.2s ease;
    font-family: 'Montserrat', sans-serif;
}

.btn-primary {
    background-color: var(--datanalytics-blue);
    border-color: var(--datanalytics-blue);
}

.btn-primary:hover {
    background-color: var(--datanalytics-blue-dark);
    border-color: var(--datanalytics-blue-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(51, 102, 204, 0.3);
}

.btn-outline-primary {
    color: var(--datanalytics-blue);
    border-color: var(--datanalytics-blue);
}

.btn-outline-primary:hover {
    background-color: var(--datanalytics-blue);
    border-color: var(--datanalytics-blue);
    transform: translateY(-1px);
}

.form-control {
    border-radius: 0.5rem;
    border: 1px solid #d1d5db;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
}

.form-control:focus {
    border-color: var(--datanalytics-blue);
    box-shadow: 0 0 0 0.2rem rgba(51, 102, 204, 0.25);
}

.form-select:focus {
    border-color: var(--datanalytics-blue);
    box-shadow: 0 0 0 0.2rem rgba(51, 102, 204, 0.25);
}

.dashboard-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e5e7eb;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.dashboard-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(51, 102, 204, 0.1);
    border-color: var(--datanalytics-blue-light);
}

.dashboard-card .card-body {
    padding: 2rem;
}

.dashboard-card i[class*="display-"] {
    transition: transform 0.3s ease, color 0.3s ease;
}

.dashboard-card:hover i[class*="display-"] {
    transform: scale(1.1);
    color: var(--datanalytics-blue) !important;
}

/* Navigation enhancements */
.navbar-dark .navbar-nav .nav-link {
    transition: all 0.2s ease;
    border-radius: 0.375rem;
    margin: 0 0.25rem;
}

.navbar-dark .navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

/* Alert enhancements */
.alert {
    border: none;
    border-radius: 0.75rem;
    font-family: 'Montserrat', sans-serif;
}

.alert-info {
    background: linear-gradient(135deg, #e1f5fe 0%, #f0f9ff 100%);
    color: var(--datanalytics-blue-dark);
    border-left: 4px solid var(--datanalytics-blue);
}

.alert-success {
    background: linear-gradient(135deg, #e8f5e8 0%, #f0fff0 100%);
    color: #2d5a2d;
    border-left: 4px solid #28a745;
}

.alert-warning {
    background: linear-gradient(135deg, #fff8e1 0%, #fffbf0 100%);
    color: #8a5a00;
    border-left: 4px solid #ffc107;
}

.alert-danger {
    background: linear-gradient(135deg, #ffebee 0%, #fff5f5 100%);
    color: #721c24;
    border-left: 4px solid #dc3545;
}

/* Text enhancements */
.text-primary {
    color: var(--datanalytics-blue) !important;
}

.bg-primary {
    background-color: var(--datanalytics-blue) !important;
}

.border-primary {
    border-color: var(--datanalytics-blue) !important;
}

/* Logo and branding */
.datanalytics-logo {
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.hero-section {
    background: linear-gradient(135deg, var(--datanalytics-blue) 0%, var(--datanalytics-blue-dark) 100%);
}

/* Footer styling */
footer {
    background: linear-gradient(135deg, #f8fafc 0%, #e5e7eb 100%) !important;
    border-top: 1px solid #e5e7eb;
}

/* Animation utilities */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

.slide-up {
    animation: slideUp 0.6s ease-out;
}

@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

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

/* Table enhancements */
.table {
    font-family: 'Montserrat', sans-serif;
}

.table th {
    background-color: #f8fafc;
    border-color: #e5e7eb;
    font-weight: 600;
    color: var(--datanalytics-blue-dark);
}

.table-hover tbody tr:hover {
    background-color: rgba(51, 102, 204, 0.05);
}

/* Badge enhancements */
.badge {
    font-family: 'Montserrat', sans-serif;
    font-weight: 500;
}

.badge.bg-primary {
    background-color: var(--datanalytics-blue) !important;
}

/* Loading states */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(51, 102, 204, 0.2), transparent);
    animation: loading 1.5s infinite;
}

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

/* Mobile responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .dashboard-card {
        margin-bottom: 1.5rem;
    }
    
    .navbar-brand svg {
        width: 140px;
        height: 28px;
    }
    
    .card-body {
        padding: 1.5rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand svg {
        width: 120px;
        height: 24px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    [data-bs-theme="auto"] {
        --bs-body-bg: #1a1a1a;
        --bs-body-color: #e5e7eb;
    }
    
    [data-bs-theme="auto"] .card {
        background-color: #2d3748;
        border-color: #4a5568;
    }
    
    [data-bs-theme="auto"] .navbar-brand svg text {
        fill: white;
    }
}