body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1, h2 {
    color: #333;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

.form-container, .tasks-container, .notifications-container {
    margin-bottom: 20px;
}

form {
    display: flex;
    gap: 10px;
    align-items: center;
}

input[type="text"], input[type="number"] {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    flex-grow: 1;
}

button {
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    color: #fff;
    background-color: #007bff;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #0056b3;
}

.btn-stop {
    background-color: #dc3545;
}
.btn-stop:hover {
    background-color: #c82333;
}

.btn-resume {
    background-color: #28a745;
}
.btn-resume:hover {
    background-color: #218838;
}

.btn-delete {
    background-color: #6c757d;
}
.btn-delete:hover {
    background-color: #5a6268;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table th, table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}

table th {
    background-color: #f8f9fa;
}

table tr:nth-child(even) {
    background-color: #f2f2f2;
}

td .actions-cell {
    display: flex;
    gap: 5px;
}

#notifications {
    background-color: #e9ecef;
    border: 1px solid #ced4da;
    padding: 15px;
    height: 150px;
    overflow-y: auto;
    border-radius: 4px;
}

#notifications div {
    margin-bottom: 5px;
    padding: 5px;
    background: #fff;
    border-radius: 3px;
}