#backbtn {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    z-index: 99;
    color: #333333;
    font-size: 1.5rem;
    font-weight: 1000;
    background: transparent;
    cursor: pointer;
    border: none;
}
h2 {
    margin: 5vh;
    text-align: center;
    color: #3498db;
    font-size: 2rem;
    font-weight: 800;
}
h3 {
    margin-top: 4rem;
    text-align: center;
    color: #FFFFFF;
    font-size: 1.4rem;
}
form {
    margin: auto;
    width: 60vw;
    text-align: center;
}
label {
    color: #FFFFFF;
    font-size: 1.4rem;
}
select {
    width: 100%;
    margin-top: 0.5rem;
    margin-bottom: 2rem;
    font-size: 1.4rem;
    text-align: center;
    padding: 0.55rem;
    border-style: none;
    border-radius: 10000rem;
    background-color: #333333;
    color: #FFFFFF;
}
input[type="number"] {
    width: 100%;
    margin-top: 0.5rem;
    margin-bottom: 2rem;
    font-size: 1.4rem;
    text-align: center;
    padding: 0.5rem;
    border-style: none;
    border-radius: 10000rem;
    background-color: #333333;
    color: #FFFFFF;
    transform: translate(-0.5rem);
}
#notesperlvlinp {
    margin-bottom: 0;
}

button {
    display: block;
    margin: auto;
    margin-top: 3rem;
    width: 25vh;
    padding-top: 12px;
    padding-bottom: 10px;
    font-weight: bold;
    font-size: 1.1rem;
    text-decoration: none;
    text-align: center;
    background-color: #3498db;
    color: #FFFFFF;
    border-radius: 1.8rem;
    border-style: none;
    max-width: 15rem;
    cursor: pointer;
    transition: all 0.3s ease;
}
@media (hover: hover){
    button:hover {
        border-radius: 0;
    }
}
#startbtn{
    margin-bottom: 5rem;
}

#checkcontainer {
    width: 15rem;
    margin: auto;
    text-align: center;
}
.stringCheckbox{
    margin-top: 1.2rem;
}
.notes {
    width: 7rem;
    margin: auto;
    margin-top: -0.3rem;
    margin-bottom: 1rem;
    text-align: left;
    border: solid 2px #3498db;
    border-bottom-left-radius: 25px;
    border-bottom-right-radius: 25px;
    border-top: none;
    padding: 1rem;
    padding-bottom: 0.4rem;
    height: 9rem;
    overflow: hidden;
    transition: all 0.3s ease;
}
.notes.hidden {
    padding: 0 1rem;
    border-bottom: none;
    height: 0px;
    transition: all 0.3s ease;
}
.notes label {
    font-size: 1.1rem;
}
#checkcontainer label {
    margin-bottom: 0.2rem;
}
input[type="checkbox"] {
    appearance: none; /* Remove default appearance */
    -webkit-appearance: none; /* For older versions of Safari/Chrome */
    width: 1.2rem;
    height: 1.2rem;
    border: 2px solid #333;
    border-radius: 5px;
    outline: none; /* Remove focus outline */
    margin-right: 5px;
    vertical-align: middle;
    margin: 0.6rem 0.5rem 1rem 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}
input[type="checkbox"]:checked {
    background-color: #3498db;
    border-color: #3498db;
}
.stringlbl input[type="checkbox"]{
    border: none;
    height: 0.8rem;
}
.stringlbl input[type="checkbox"]:checked{
    background-color: transparent;
}


.stringlbl{
    z-index: 2;
    margin: auto;
    display: block;
    border: solid 2px #3498db;
    border-radius: 3rem;
    background-color: #1c1c1c;
    width: 20vh;
    padding-top: 0.2rem;
    padding-left: 2.2rem;
    text-align: center;
    font-size: 1.2rem;
    cursor: pointer;
    transform: translate3d(0, 0, 0);
    transition: all 0.3s ease;
}
@media (hover: hover){
    .stringlbl:hover{
        border-radius: 0;
    }
}
.stringlbl.checked {
    background-color: #3498db;
}
.line {
    z-index: 1;
    width: 150vw;
    margin-left: -50vw;
    margin-top: -1.6rem;
    margin-bottom: 1.5rem;
    height: 2px;
    background-color: #3498db;
}
#line6,
#line5{
    height: 3px;
}
#line4,
#line3 {
    height: 2px;
}
#line2,
#line1 {
    height: 1px;
}

.presetbtn {
    margin-top: 0.8rem;
    background-color: #333333;
}