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

body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

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

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

.tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tab-button {
    background-color: #ecf0f1;
    border: none;
    padding: 12px 20px;
    cursor: pointer;
    transition: background-color 0.3s;
    border-radius: 5px 5px 0 0;
    margin: 0 5px;
    font-weight: bold;
}

.tab-button.active,
.tab-button:hover {
    background-color: #3498db;
    color: white;
}

.tab-content {
    background: white;
    padding: 20px;
    border-radius: 0 0 5px 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.tab-content h2 {
    margin-top: 0;
    color: #2c3e50;
    border-bottom: 2px solid #ecf0f1;
    padding-bottom: 10px;
}

.form-section {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.form-section h3 {
    margin-top: 0;
    color: #2c3e50;
}

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

.form-group label {
    display: block;
    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;
    box-sizing: border-box;
}

.form-group input[type="date"],
.form-group input[type="time"] {
    padding: 8px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

.table-section {
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

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

th {
    background-color: #f2f2f2;
    font-weight: bold;
}

tr:hover {
    background-color: #f5f5f5;
}

.actions button {
    margin: 0 5px;
    padding: 5px 10px;
    font-size: 0.9em;
}

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

.actions button.delete:hover {
    background-color: #c0392b;
}

.export-import-section {
    text-align: center;
    margin: 30px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 5px;
}

.export-import-section button {
    margin: 0 10px;
    padding: 12px 25px;
    font-size: 1em;
}

.export-import-section #import-btn {
    background-color: #2ecc71;
}

.export-import-section #import-btn:hover {
    background-color: #27ae60;
}

/* Responsive */
@media (max-width: 768px) {
    .tabs {
        flex-direction: column;
    }
    .tab-button {
        border-radius: 5px;
        margin: 5px 0;
    }
    .tab-content {
        border-radius: 5px;
    }
}