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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: #f5f5f5;
            color: #333;
            transition: background-color 0.3s, color 0.3s;
        }

        html.dark-mode body {
            background-color: #1a1a1a;
            color: #f1f1f1;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        .header-container {
            position: sticky;
            top: 0;
            z-index: 100;
         #   background-color: #2c3e50;
         #   margin-bottom: 20px;
        }

        .header {
            background-color: #2c3e50;
            color: white;
            padding: 20px;
            border-radius: 8px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .header h1 {
            flex-grow: 1;
            text-align: center;
            margin: 0;
        }

        .controls {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        #notifyButton-modal {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
        }

        #notifyButton-modal:hover {
            background-color: #2980b9;
        }

        #installPwaButton {
            background-color: #27ae60;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
        }

        #installPwaButton:hover {
            background-color: #219a52;
        }

        html.dark-mode .header {
            background-color: #2c3e50;
        }

        .main-content {
            display: grid;
            grid-template-columns: 1fr 400px;
            gap: 20px;
        }

        .calendar-section {
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        html.dark-mode .calendar-section {
            background: #2a2a2a;
            box-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }

        .month-selector {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .month-selector button {
            background: #3498db;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
        }

        .month-selector button:hover {
            background: #2980b9;
        }

        .calendar {
            width: 100%;
            border-collapse: collapse;
            table-layout: fixed;
        }

        .calendar th {
            background: #34495e;
            color: white;
            padding: 10px;
            text-align: center;
        }

        html.dark-mode .calendar th {
            background: #3c4043;
        }

        .calendar td {
            border: 1px solid #ecf0f1;
            padding: 5px;
            height: 100px;
            vertical-align: top;
            position: relative;
            cursor: pointer;
            overflow: hidden;
        }

        html.dark-mode .calendar td {
            border-color: #444;
        }

        .calendar td:hover {
            background: #f8f9fa;
        }

        html.dark-mode .calendar td:hover {
            background: #333;
        }

        .calendar td.other-month {
            color: #bdc3c7;
            background: #f8f9fa;
        }

        html.dark-mode .calendar td.other-month {
            color: #666;
            background: #222;
        }

        .calendar td.selected {
            box-shadow: inset 0 0 0 2px #3498db;
        }

        html.dark-mode .calendar td.selected {
            box-shadow: inset 0 0 0 2px #3498db;
        }

        .day-number {
            font-weight: bold;
            margin-bottom: 4px;
        }

        .free-hours {
            font-size: 12px;
            font-weight: bold;
            color: #27ae60; /* Green */
            position: absolute;
            bottom: 5px;
            right: 5px;
        }

        .calendar td.low-availability {
            background-color: #ffebee; /* Light Red */
        }

        .calendar td.medium-availability {
            background-color: #fffde7; /* Light Yellow */
        }

        html.dark-mode .calendar td.low-availability {
            background-color: #4a1e1e;
        }

        html.dark-mode .calendar td.medium-availability {
            background-color: #4d4d1f;
        }

        .calendar-task {
            background: #e3f2fd;
            color: #2c3e50;
            padding: 2px 4px;
            border-radius: 4px;
            font-size: 12px;
            margin-top: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        html.dark-mode .calendar-task {
            background: #004a7f;
            color: #f1f1f1;
        }

        .day-panel {
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            height: fit-content;
        }

        html.dark-mode .day-panel {
            background: #2a2a2a;
            box-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }

        .day-panel h3 {
            margin-bottom: 15px;
            color: #2c3e50;
        }

        html.dark-mode .day-panel h3 {
            color: #f1f1f1;
        }

        .add-task-btn {
            background: #27ae60;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 4px;
            cursor: pointer;
            width: 100%;
            margin-bottom: 15px;
        }

        .add-task-btn:hover {
            background: #219a52;
        }

        

        .task-list {
            list-style: none;
        }

        .task-item {
            background: #f8f9fa;
            padding: 10px;
            margin-bottom: 8px;
            border-radius: 4px;
            border-left: 4px solid #3498db;
            position: relative;
        }

        html.dark-mode .task-item {
            background: #333;
            border-left-color: #3498db;
        }

        .task-item.recurring {
            border-left-color: #9b59b6;
        }

        html.dark-mode .task-item.recurring {
            border-left-color: #9b59b6;
        }

        .task-progress-text {
            position: absolute;
            top: 10px;
            right: 10px;
            font-size: 14px;
            font-weight: bold;
            color: #27ae60;
        }

        .task-time {
            font-weight: bold;
            color: #2c3e50;
        }

        html.dark-mode .task-time {
            color: #f1f1f1;
        }

        .task-title {
            margin: 4px 0;
        }

        .task-actions {
            margin-top: 8px;
        }

        .task-actions button {
            background: none;
            border: 1px solid #bdc3c7;
            padding: 4px 8px;
            margin-right: 5px;
            border-radius: 3px;
            cursor: pointer;
            font-size: 12px;
        }

        html.dark-mode .task-actions button {
            color: #f1f1f1;
            border-color: #666;
        }

        .task-actions button:hover {
            background: #ecf0f1;
        }

        html.dark-mode .task-actions button:hover {
            background: #444;
        }

        .task-actions button.delete {
            color: #e74c3c;
            border-color: #e74c3c;
        }

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

        .modal-content {
            background: white;
            padding: 30px;
            border-radius: 8px;
            width: 90%;
            max-width: 500px;
        }

        html.dark-mode .modal-content {
            background: #2a2a2a;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-group label {
            display: flex;
            align-items: center;
            margin-bottom: 5px;
            font-weight: bold;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
        }

        html.dark-mode .form-group input,
        html.dark-mode .form-group select,
        html.dark-mode .form-group textarea {
            background: #333;
            color: #f1f1f1;
            border-color: #555;
        }

        .form-group input[type=checkbox] {
            width: auto;
            margin-right: 10px;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 60px;
        }

        .form-actions {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .form-actions button {
            flex: 1;
            padding: 10px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }

        .btn-primary {
            background: #3498db;
            color: white;
        }

        .btn-primary:hover {
            background: #2980b9;
        }

        .btn-secondary {
            background: #95a5a6;
            color: white;
        }

        .btn-secondary:hover {
            background: #7f8c8d;
        }

        .recurring-options {
            display: none;
            background: #f8f9fa;
            padding: 15px;
            border-radius: 4px;
            margin-top: 10px;
        }

        .date-range-group {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        html.dark-mode .recurring-options {
            background: #333;
        }

        .weekdays-selector {
            display: flex;
            gap: 5px;
            margin-top: 10px;
        }

        .weekdays-selector label {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 5px;
            border: 1px solid #ddd;
            border-radius: 4px;
            cursor: pointer;
        }

        html.dark-mode .weekdays-selector label {
            border-color: #555;
        }

        .monthly-options-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 15px;
            align-items: end;
        }

        .checkbox-group {
            margin-bottom: 10px; /* Align checkbox with the input field */
        }

        .weekdays-selector input[type="checkbox"] {
            margin-top: 5px;
        }

        #modalTitle {
            padding-bottom: 10px;
        }

        .time-gap {
            background: #e0f7fa;
            padding: 10px;
            margin-bottom: 8px;
            border-radius: 4px;
            border-left: 4px solid #00bcd4;
            text-align: center;
            color: #00838f;
            font-weight: bold;
            cursor: pointer;
        }

        html.dark-mode .time-gap {
            background: #00343d;
            color: #7ddde8;
            border-left-color: #00bcd4;
        }

        .gap-info {
            font-size: 14px;
        }

        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }

        .task-item.completed {
            text-decoration: line-through;
            opacity: 0.6;
        }

        /* Theme switcher */
        .theme-switcher {
            position: relative;
            display: inline-block;
            width: 60px;
            height: 34px;
        }

        .theme-switcher input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 34px;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 26px;
            width: 26px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }

        input:checked + .slider {
            background-color: #2196F3;
        }

        input:focus + .slider {
            box-shadow: 0 0 1px #2196F3;
        }

        input:checked + .slider:before {
            transform: translateX(26px);
        }

        .slider.round {
            border-radius: 34px;
        }

        .slider.round:before {
            border-radius: 50%;
        }

        .settings-button {
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            font-size: 24px;
            padding: 0 10px;
            line-height: 1;
        }

        .radio-group {
            display: inline-flex;
            border: 1px solid #ddd;
            border-radius: 4px;
            overflow: hidden;
        }

        .radio-group label {
            margin-bottom: 0;
        }

        .radio-group input[type="radio"] {
            display: none;
        }

        .radio-group span {
            display: block;
            padding: 10px 15px;
            text-align: center;
            cursor: pointer;
            background: #f8f9fa;
            user-select: none;
            border-left: 1px solid #ddd;
        }

        .radio-group label:first-child span {
            border-left: none;
        }

        .radio-group input[type="radio"]:checked + span {
            background: #3498db;
            color: white;
        }

        html.dark-mode .radio-group {
            border-color: #555;
        }

        html.dark-mode .radio-group span {
            background: #333;
            border-left-color: #555;
        }

        html.dark-mode .radio-group input[type="radio"]:checked + span {
            background: #007bff;
        }

        .btn-group {
            display: flex;
        }

        .btn-group button {
            flex: 1;
            padding: 10px;
            border: 1px solid #ddd;
            background: #f8f9fa;
            cursor: pointer;
        }

        .btn-group button:first-child {
            border-top-left-radius: 4px;
            border-bottom-left-radius: 4px;
        }

        .btn-group button:last-child {
            border-top-right-radius: 4px;
            border-bottom-right-radius: 4px;
            border-left: none;
        }

        html.dark-mode .btn-group button {
            background: #333;
            border-color: #555;
            color: #f1f1f1;
        }