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

body {
    font-family: Arial, sans-serif;
    background-color: #1a1a2e;
    color: white;
}

.navbar {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    background-color: #111;
}

.navbar .logo {
    font-size: 24px;
    font-weight: bold;
}

.navbar .tabs {
    display: flex;
}

.navbar .tab {
    margin: 0 10px;
    cursor: pointer;
    padding: 10px;
    background-color: #333;
    border-radius: 5px;
}

.navbar .tab:hover {
    background-color: #444;
}

.content {
    padding: 20px;
    display: none;
}

.welcome {
    text-align: center;
}

button {
    padding: 10px 20px;
    background-color: #00b4d8;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #0096c7;
}