body {
    margin: 0;
    font-family: monospace;
    background: #0b0f14;
    color: #00ff9f;
}

header {
    background: #111827;
    padding: 15px;
    text-align: center;
    border-bottom: 1px solid #00ff9f;
}

.container {
    display: flex;
}

.sidebar {
    width: 220px;
    min-height: 100vh;
    background: #111827;
    padding: 20px;
    border-right: 1px solid #00ff9f;
}

.sidebar a {
    display: block;
    color: #00ff9f;
    text-decoration: none;
    margin: 10px 0;
}

.sidebar a:hover {
    color: white;
}

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

.card {
    background: #111827;
    padding: 15px;
    margin: 10px 0;
    border: 1px solid #00ff9f;
    border-radius: 5px;
}

.button {
    background: #00ff9f;
    color: black;
    padding: 8px 12px;
    border: none;
    cursor: pointer;
}

.button:hover {
    background: white;
}