/* Global Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header Styles */
.navbar {
    background: linear-gradient(135deg, #1a1a2e, #16213e) !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff !important;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
    border-radius: var(--border-radius);
    margin: 0 5px;
    color: rgba(255,255,255,0.9) !important;
    padding: 0.5rem 1rem;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255,255,255,0.15);
    transform: translateY(-1px);
    color: #ffffff !important;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.navbar-nav .nav-link.active {
    background-color: rgba(255,255,255,0.2);
    color: #ffffff !important;
}

/* Card Styles */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.card-header {
    background: linear-gradient(135deg, #ffffff, #f8f9fa);
    color: var(--primary-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
    font-weight: 600;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e9ecef;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.card-body {
    padding: 1.5rem;
}

/* Button Styles */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: none;
    padding: 0.5rem 1.5rem;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #2ecc71);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #e67e22);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #c0392b);
}

/* Form Styles */
.form-control {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: var(--transition);
    padding: 0.75rem 1rem;
}

.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

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

/* Table Styles */
.table {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.table thead th {
    background: var(--primary-color);
    color: white;
    border: none;
    font-weight: 600;
    padding: 1rem;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background-color: rgba(52, 152, 219, 0.05);
    transform: scale(1.01);
}

.table td {
    padding: 1rem;
    vertical-align: middle;
    border-color: #e9ecef;
}

/* Dashboard Cards */
.dashboard-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border-left: 4px solid var(--secondary-color);
}

.dashboard-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0,0,0,0.15);
}

.dashboard-card .icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.dashboard-card .number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.dashboard-card .label {
    font-size: 1.1rem;
    color: #6c757d;
    font-weight: 500;
}

/* Modal Styles */
.modal-content {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.modal-header {
    background: linear-gradient(135deg, #ffffff, #f8f9fa);
    color: var(--primary-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    border-bottom: 1px solid #e9ecef;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.modal-footer {
    border-top: 1px solid #e9ecef;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* Alert Styles */
.alert {
    border-radius: var(--border-radius);
    border: none;
    font-weight: 500;
}

.alert-success {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    color: #155724;
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    color: #721c24;
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
    color: #856404;
}

.alert-info {
    background: linear-gradient(135deg, #d1ecf1, #bee5eb);
    color: #0c5460;
}

/* Badge Styles */
.badge {
    font-size: 0.8rem;
    padding: 0.5rem 0.75rem;
    border-radius: 20px;
    font-weight: 500;
}

/* Loading Spinner */
.spinner-border {
    width: 1.5rem;
    height: 1.5rem;
    border-width: 0.2em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .dashboard-card {
        margin-bottom: 1rem;
    }
    
    .table-responsive {
        border-radius: var(--border-radius);
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

/* Layout Styles */
main {
    flex: 1;
}

.footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1rem 0;
    margin-top: auto;
}

.footer * {
    color: white !important;
}

.footer a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.footer a:hover {
    color: white;
    text-decoration: underline;
    opacity: 0.8;
}

/* Custom Utilities */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.bg-gradient-success {
    background: linear-gradient(135deg, var(--success-color), #2ecc71);
}

.bg-gradient-warning {
    background: linear-gradient(135deg, var(--warning-color), #e67e22);
}

.bg-gradient-danger {
    background: linear-gradient(135deg, var(--danger-color), #c0392b);
}