@import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro&display=swap');


:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --radius-lg: 1rem;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

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

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f8f9fa;
    color: #212529;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.card-header {
    border: none;
    background: linear-gradient(135deg, #f5f7fa 0%, #f1f3f5 100%);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

/* Buttons */
.btn {
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    padding: 0.6rem 1.2rem;
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5568d3 0%, #6a4291 100%);
}

/* Forms */
.form-control, .form-select {
    border: 1px solid #e9ecef;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.15);
}

.form-label {
    color: #212529;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* Tables */
.table {
    border-collapse: collapse;
    font-size: 0.95rem;
}

.table thead {
    background-color: #f8f9fa;
}

.table thead th {
    font-weight: 700;
    border-bottom: 2px solid #dee2e6;
    color: #495057;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.table tbody tr {
    transition: background-color 0.2s;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

/* Badges */
.badge {
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    font-size: 0.85rem;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--radius-lg);
    padding: 1rem 1.5rem;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-left: 4px solid #0dcaf0;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid #198754;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid #dc3545;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-left: 4px solid #ffc107;
}

/* Navbar */
.navbar {
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid #e9ecef;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

/* Modals */
.modal-content {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.2);
}

.modal-header {
    border: none;
    padding: 1.5rem;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border: none;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* Utilities */
.gap-3 {
    gap: 1rem;
}

.rounded-4 {
    border-radius: var(--radius-lg);
}

.transition-all {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.text-muted {
    color: #6c757d;
}

/* Responsive */
@media (max-width: 768px) {
    .card-body {
        padding: 1rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.95rem;
    }

    .table {
        font-size: 0.85rem;
    }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
}

.empty-state-icon {
    font-size: 4rem;
    color: #dee2e6;
    margin-bottom: 1rem;
}

.empty-state h4 {
    color: #495057;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: #6c757d;
    margin-bottom: 1.5rem;
}