body {
    background: #181818;
    color: #fff;
    font-family: 'Segoe UI', Arial, sans-serif;
}
.main-layout header {
    background: #222;
    color: #fff;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid orange;
}
nav a {
    color: orange;
    margin-left: 1rem;
    text-decoration: none;
    font-weight: bold;
}
nav a:hover {
    text-decoration: underline;
}
.login-container, .dashboard-container {
    background: #222;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.5);
    max-width: 400px;
    margin: 2rem auto;
}
button {
    background: orange;
    color: #222;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 1rem;
}
button:hover {
    background: #ff9800;
}
.error {
    color: #ff5252;
    margin-top: 1rem;
}