/* Modern Cobalt and White Theme */
:root {
    /* Cobalt color palette */
    --cobalt-primary: #0047ab;
    --cobalt-secondary: #1a5fc9;
    --cobalt-light: #e8f0fe;
    --cobalt-soft: #f0f7ff;
    --cobalt-dark: #003380;
    --cobalt-gradient: linear-gradient(135deg, #0047ab 0%, #1a5fc9 100%);
    
    /* Neutral colors */
    --white: #ffffff;
    --off-white: #fafbfc;
    --gray-100: #f7fafc;
    --gray-200: #edf2f7;
    --gray-300: #e2e8f0;
    --gray-400: #cbd5e0;
    --gray-500: #a0aec0;
    --gray-600: #718096;
    --gray-700: #4a5568;
    --gray-800: #2d3748;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 71, 171, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 71, 171, 0.12);
    --shadow-lg: 0 10px 15px rgba(0, 71, 171, 0.15);
    --shadow-hover: 0 8px 20px rgba(0, 71, 171, 0.15);
    
    /* Transitions - only for color and shadow changes */
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
}

/* Global Styles */
body {
    background: linear-gradient(135deg, var(--off-white) 0%, var(--white) 100%);
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

/* Navbar Styling — base styles only, main-navbar in layout controls appearance */
.navbar {
    padding: 0;
}

/* Dropdown Menu */
.dropdown-menu {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
    margin-top: 0.5rem !important;
    border: 1px solid rgba(0, 71, 171, 0.1);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.dropdown-item {
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    color: var(--gray-700);
    font-weight: 500;
    transition: var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--cobalt-gradient);
    color: white !important;
}

/* Main Content Area */
main {
    min-height: calc(100vh - 160px);
}

/* Container Styling */
.container {
    max-width: 1200px;
}

/* Card Styling */
.card {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 71, 171, 0.1);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-hover);
    /* Removed transform: translateY(-5px) */
}

.card-header {
    background: var(--cobalt-gradient);
    color: white;
    font-weight: 600;
    border-bottom: none;
    padding: 1.25rem 1.5rem;
}

/* Button Styling */
.btn {
    border-radius: var(--radius-full);
    padding: 0.6rem 1.5rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
    border: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

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

.btn-primary:hover {
    box-shadow: var(--shadow-hover);
    /* Removed transform: translateY(-2px) */
}

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

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

/* Form Styling */
.form-control {
    border-radius: var(--radius-md);
    border: 2px solid var(--gray-200);
    padding: 0.75rem 1rem;
    transition: var(--transition-fast);
    background: var(--white);
}

.form-control:focus {
    border-color: var(--cobalt-primary);
    box-shadow: 0 0 0 3px rgba(0, 71, 171, 0.2);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

/* Alert Styling */
.alert {
    border: none;
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    position: relative;
}

.alert-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.alert-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.alert-info {
    background: var(--cobalt-gradient);
    color: white;
}

/* Pagination Styling */
.pagination .page-link {
    border: none;
    color: var(--cobalt-primary);
    background: transparent;
    margin: 0 0.2rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    font-weight: 600;
}

.pagination .page-link:hover {
    background: var(--cobalt-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
    /* Removed transform: translateY(-2px) */
}

.pagination .page-item.active .page-link {
    background: var(--cobalt-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--cobalt-light);
    border-top-color: var(--cobalt-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--cobalt-gradient);
    border-radius: var(--radius-full);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        padding: 0.75rem 0;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .container {
        padding: 0 1.25rem;
    }
    
    .dropdown-menu {
        background: var(--white);
        box-shadow: var(--shadow-md);
        border: 1px solid var(--gray-200);
        margin: 0.25rem 0 !important;
    }
}

/* Print Styles */
@media print {
    .navbar {
        display: none;
    }
    
    body {
        background: white;
    }
}