body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: smaller;
    background-color: black;
    color: white;
}

.btn-primary {
    background-color: #e9e9e9 !important;
    color: black !important;
    border-color: #acacac !important;
    box-shadow: none !important;
}

.btn-primary:hover {
    background-color: white !important;
}

.btn-primary.disabled, .btn-primary:disabled {
    background-color: #e9e9e9;
    color: #909090;
    border-color: #acacac;
}

button span {
    padding-left: 0.5em;
}

button i {
    padding-top: 3px;
    padding-bottom: 3px;
    padding-left: 6px;
    padding-right: 6px;
    border-radius: 5px;
}

#loaderpane {
    position: absolute;
    top: 0px;
    right: 0px;
    width: 100%;
    height: 100%;
    background-color: black;
    z-index: 10000000;
    opacity: 0.3;
    filter: alpha(opacity=30);
}

#loadergif {
    position: absolute;
    top: 0px;
    right: 0px;
    width: 100%;
    height: 100%;
    background-color: transparent;
    background-image: url('loader.gif');
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100px;
    z-index: 10000001;                
}

#ui {
    margin-top: 1em;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 1em;
}

#test {
    position: fixed;
    top: 0px;
    width: 100%;
}

#puzzle {
    margin: auto;

    display: grid;
    grid-template-rows: 3fr, 1fr, 1fr;
    grid-template-columns: 1fr, 1fr, 1fr, 1fr;
    justify-items: center;
    align-items: center;
}

#puzzle div.solution {
    border: 3px solid black;
}

#puzzle div.solution:hover {
    border: 3px solid white;
    cursor: pointer;
}

#puzzle div.solution.picked.correct, #matrix.correct {
    border: 3px solid green;
}

#puzzle div.solution.picked.incorrect, #matrix.incorrect {
    border: 3px solid red;
}

#matrix {
    border: 3px solid white;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    position: absolute;
    color: black;
    background: white;
    border: 1px solid black;
    width: 300px;
}

.modal-header {
    padding: 0.5em;
    color: black;   
    background-color: #acacac;
}

#message.incorrect .modal-header {
    background-color: red;
    color: #acacac;
}

#message.correct .modal-header {
    background-color: green;
    color: #acacac;
}

.modal-close {
    margin-left: auto;
    margin-right: 0;
    color: #eeeeee;
}

.modal-close:hover {
    color: white;
}

.modal-relations {
    font-family: monospace;
    font-size: 80%;
}

#calendar {
    margin: 1em;
    float: left;
    position: relative;
    z-index: 10;
}

#calendar .month {
    border: 1px solid #acacac;
    margin-bottom: 1em;
}

#calendar .monthheader {
    background: #acacac;
    color: black;
    text-align: center;
}

#calendar .monthbody {
    display: grid;
    grid-template-rows: repeat(6,1fr);
    grid-template-columns: repeat(7, 1fr);
    justify-items: center;
    align-items: center;
}

#calendar .day {
    grid-column: auto;
    grid-row: auto;
    text-align: center;
    margin: 0.2em;
    padding: 0.2em;
    min-width: 2em;
}

#calendar .day.weekday {
    color: #acacac;
}

#calendar .day.future {
    color: #666666;
}

#calendar .day.past {
    color: white;
    cursor: pointer;
}

#calendar .day.selected {
    background-color: #acacac;
}

#calendar .day.present {
    border: 1px solid white;
    cursor: pointer;
}

#calendar .day.correct {
    border: 1px solid green;
}

#calendar .day.incorrect {
    border: 1px solid red;
}