.btn-start {
    background: linear-gradient(#0000, rgb(0 0 0/40%)) top/100% 800%;
    background-color: var(--secondary-color);
    color: white;
    font-size: 18px;
    padding: 10px 40px;
    border-radius: var(--primary-border-radius);
    text-decoration: none;
    transition: 0.5s;
    border: none;
    font-weight: bold;

}
.btn-start:hover {
    background-position: bottom;
}
.subject-start-button {
    background-color: var(--secondary-color);
    font-size: 16px;
    padding: 10px 20px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-left: auto;
    border-radius: var(--primary-border-radius);
}
.back-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 16px;
    margin-bottom: 20px;
    display: inline-block;
}
.btn-logout{
    background-color: var(--secondary-color);
    color: white;
    font-size: 18px;
    padding: 20px;
    margin-right: 20px;
    text-decoration: none;
    border-radius: var(--primary-border-radius);
    margin-top: 12px;
}
.btn-edit, .btn-save, .btn-cancel{
    background-color: var(--secondary-color);
    color: white;
    font-size: 18px;
    padding: 20px;
    margin-right: 20px;
    text-decoration: none;
    border-radius: var(--primary-border-radius);
    min-width: 100px;
}
.btn-add {
    background: linear-gradient(#0000, rgb(0 0 0/40%)) top/100% 800%;
    background-color: var(--secondary-color);
    color: white;
    font-size: 18px;
    padding: 10px;
    text-decoration: none;
    border-radius: var(--primary-border-radius);
    box-shadow: 0 0 10px 0 rgba(0,0,0,0.2);
    transition: 0.5s;
}
.btn-add:hover {
    background-position: bottom;
}