body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    cursor: pointer;
    background: linear-gradient(45deg, #007bff, #00d4ff);
    color: white;
    border-radius: 10px 10px 0 0;
}

.form-control {
    border-radius: 8px;
    border: 1px solid #ced4da;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}

.btn-primary {
    border-radius: 8px;
    padding: 10px 20px;
    background: linear-gradient(45deg, #007bff, #00d4ff);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0056b3, #0096cc);
}

.alert {
    border-radius: 8px;
}

.table {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
}

.table th, .table td {
    vertical-align: middle;
}

.animate__fadeIn {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
/* Existing styles from Part 1 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    cursor: pointer;
    background: linear-gradient(45deg, #007bff, #00d4ff);
    color: white;
    border-radius: 10px 10px 0 0;
}

.form-control {
    border-radius: 8px;
    border: 1px solid #ced4da;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}

.btn-primary {
    border-radius: 8px;
    padding: 10px 20px;
    background: linear-gradient(45deg, #007bff, #00d4ff);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0056b3, #0096cc);
}

.alert {
    border-radius: 8px;
}

.table {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
}

.table th, .table td {
    vertical-align: middle;
}

.animate__fadeIn {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* New styles for Part 2 */
.form-section {
    margin-bottom: 20px;
}

.table-responsive {
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    border-radius: 8px;
    background: linear-gradient(45deg, #6c757d, #adb5bd);
    border: none;
}

.btn-secondary:hover {
    background: linear-gradient(45deg, #5a6268, #8f9ba6);
}

.chart-container {
    max-width: 500px;
    margin: 0 auto;
}
/* Existing styles from Parts 1-2 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    cursor: pointer;
    background: linear-gradient(45deg, #007bff, #00d4ff);
    color: white;
    border-radius: 10px 10px 0 0;
}

.form-control {
    border-radius: 8px;
    border: 1px solid #ced4da;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}

.btn-primary {
    border-radius: 8px;
    padding: 10px 20px;
    background: linear-gradient(45deg, #007bff, #00d4ff);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0056b3, #0096cc);
}

.btn-secondary {
    border-radius: 8px;
    background: linear-gradient(45deg, #6c757d, #adb5bd);
    border: none;
}

.btn-secondary:hover {
    background: linear-gradient(45deg, #5a6268, #8f9ba6);
}

.alert {
    border-radius: 8px;
}

.table {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
}

.table th, .table td {
    vertical-align: middle;
}

.table-responsive {
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.chart-container {
    max-width: 500px;
    margin: 0 auto;
}

.animate__fadeIn {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* New styles for Part 3 */
.badge-paid {
    background-color: #28a745;
    color: white;
    padding: 5px 10px;
    border-radius: 12px;
}

.badge-pending {
    background-color: #dc3545;
    color: white;
    padding: 5px 10px;
    border-radius: 12px;
}
/* Existing styles from Parts 1-3 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    cursor: pointer;
    background: linear-gradient(45deg, #007bff, #00d4ff);
    color: white;
    border-radius: 10px 10px 0 0;
}

.form-control {
    border-radius: 8px;
    border: 1px solid #ced4da;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}

.btn-primary {
    border-radius: 8px;
    padding: 10px 20px;
    background: linear-gradient(45deg, #007bff, #00d4ff);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0056b3, #0096cc);
}

.btn-secondary {
    border-radius: 8px;
    background: linear-gradient(45deg, #6c757d, #adb5bd);
    border: none;
}

.btn-secondary:hover {
    background: linear-gradient(45deg, #5a6268, #8f9ba6);
}

.alert {
    border-radius: 8px;
}

.table {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
}

.table th, .table td {
    vertical-align: middle;
}

.table-responsive {
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.chart-container {
    max-width: 500px;
    margin: 0 auto;
}

.badge-paid {
    background-color: #28a745;
    color: white;
    padding: 5px 10px;
    border-radius: 12px;
}

.badge-pending {
    background-color: #dc3545;
    color: white;
    padding: 5px 10px;
    border-radius: 12px;
}

.animate__fadeIn {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* New styles for Part 4 */
.chart-container-large {
    max-width: 700px;
    margin: 0 auto;
}