.not-started {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #1a1a2e;
}

.not-started-content {
    text-align: center;
    color: #fff;
}

.not-started-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.not-started-content h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.not-started-content p {
    color: #999;
    margin-bottom: 1.5rem;
}

.btn-back {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: #4caf50;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-size: 1rem;
}

    .btn-back:hover {
        background: #43a047;
    }