:root {
    --primary-blue: #1565C0;
    --light-blue: #2196F3;
    --dark-blue: #0D47A1;
    --accent-blue: #42A5F5;
    --background: #F5F7FA;
    --card-bg: #FFFFFF;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #E0E0E0;
    --success: #4CAF50;
    --warning: #FF9800;
    --error: #F44336;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

/*--------------------------------------Utility Classes Section--------------------------------------*/
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    padding: 24px;
    margin-bottom: 24px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    justify-content: center;
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, var(--dark-blue), var(--primary-blue));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: #ECEFF1;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: #CFD8DC;
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #388E3C;
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-danger:hover {
    background: #D32F2F;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/*--------------------------------------Form Styles Section--------------------------------------*/
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

/*--------------------------------------Table Styles Section--------------------------------------*/
.table-container {
    overflow-x: auto;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    color: white;
}

th {
    padding: 16px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
}

td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

tr:hover {
    background: #F5F5F5;
}
.thead-tr:hover{
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
}

tr:last-child td {
    border-bottom: none;
}

/*--------------------------------------Badge Styles Section--------------------------------------*/
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: #E8F5E9;
    color: #2E7D32;
}

.badge-warning {
    background: #FFF3E0;
    color: #E65100;
}

.badge-info {
    background: #E3F2FD;
    color: #1565C0;
}

/*--------------------------------------Alert Styles Section--------------------------------------*/
.alert {
    padding: 16px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: #E8F5E9;
    color: #2E7D32;
    border-left: 4px solid #4CAF50;
}

.alert-error {
    background: #FFEBEE;
    color: #C62828;
    border-left: 4px solid #F44336;
}

.alert-info {
    background: #E3F2FD;
    color: #1565C0;
    border-left: 4px solid #2196F3;
}

.alert-warning {
    background: #FFF3E0;
    color: #E65100;
    border-left: 4px solid #FF9800;
}

/*--------------------------------------Loading Spinner Section--------------------------------------*/
.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-blue);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/*--------------------------------------Modal Styles Section--------------------------------------*/
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 32px;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-header h2 {
    color: var(--primary-blue);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
}

/*--------------------------------------Responsive Grid Section--------------------------------------*/
.grid {
    display: grid;
    gap: 24px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/*--------------------------------------Empty State Section--------------------------------------*/
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty-state-text {
    font-size: 18px;
    margin-bottom: 8px;
}

/*--------------------------------------Checkbox Styles Section--------------------------------------*/
.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-blue);
}

/*--------------------------------------Photo Preview Section--------------------------------------*/
.photo-preview {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

/*--------------------------------------Responsive Design Section--------------------------------------*/
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .card {
        padding: 16px;
    }

    table {
        font-size: 12px;
    }

    th, td {
        padding: 12px 8px;
    }

    .btn {
        padding: 10px 16px;
        font-size: 13px;
    }

    .modal-content {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/*--------------------------------------Print Styles Section--------------------------------------*/
@media print {
    body {
        background: white;
    }

    .no-print {
        display: none !important;
    }
}