:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --danger-color: #e74c3c;
    --success-color: #2ecc71;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --border-color: #ddd;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    background-color: #f9f9f9;
    color: var(--text-color);
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 30px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.login-container h1 {
    text-align: center;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
}

.btn {
    padding: 10px 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: var(--secondary-color);
}

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

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

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    background-color: var(--primary-color);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content {
    padding: 20px;
    flex: 1;
}

.toolbar {
    margin-bottom: 20px;
    display: flex;
    justify-content: flex-end;
}

.user-table-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
}

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

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--light-gray);
    font-weight: bold;
}

tr:hover {
    background-color: var(--light-gray);
}

.action-btn {
    padding: 5px 10px;
    margin-right: 5px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 20px;
    border-radius: 8px;
    width: 50%;
    max-width: 500px;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: black;
}

@media (max-width: 768px) {
    .modal-content {
        width: 90%;
    }
}