body {
    position: relative;
    font-family: 'Gill Sans', 'Helvetica', 'Arial', sans-serif;
    background-color: white;
    background-image: radial-gradient(black 0.08rem, transparent 0.04rem);
    background-size: 1.6rem 1.6rem;
    overflow: hidden;
    cursor: crosshair;
}

.vertex {
    z-index: 3;

    position: absolute; 
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    transform-origin: center center;
    width: 3rem;
    height: 3rem;
    padding: 0.1rem;
    background-color: black;
    color: white;
    font-size: 1.25rem;
    text-overflow: ellipsis;
    border: 0.1rem solid black;
    border-radius: 50%;
    box-shadow: 0rem 0rem 1rem 2rem transparent;

    cursor: pointer;
}

.edge {
    z-index: 1;

    position: absolute; 

    user-select: none;
    height: 0.2rem;
    transform-origin: 0% 50%;
    box-shadow: 0rem 0rem 3rem 5rem transparent;
    background-color: black;
    color: white;

    cursor: pointer;
}

.edge-weight {
    z-index: 2;

    position: absolute; 
    transform: rotate(0deg);
    padding: 0.2rem 0.2rem;
    box-shadow: 0rem 0rem 1rem 1rem transparent;

    font-size: 1rem;
    background-color: white;
    color: black;
    border: 0.1rem solid black;
    border-radius: 20%;
    align-items: center;
    justify-content: center;

    user-select: none;
    cursor: pointer;
}

.edge-flow {
    z-index: 2;

    position: absolute; 
    transform: rotate(0deg);
    padding: 0.2rem 0.2rem;
    box-shadow: 0rem 0rem 1rem 1rem transparent;

    font-size: 1rem;
    background-color: white;
    color: black;
    border: 0.1rem solid black;
    border-radius: 20%;
    align-items: center;
    justify-content: center;

    user-select: none;
    cursor: pointer;
}

.edge-arrow {
    z-index: 2;

    position: absolute;
    width: 0rem;
    height: 0rem;
    border-left: 0.5rem solid transparent;
    border-right: 0.5rem solid transparent;
    border-bottom: 1.2rem solid black;
    box-shadow: 0rem 0rem 0.6rem 1rem transparent;

    transform-origin: 50% 0%;

    user-select: none;
    cursor: pointer;
}

input {
    cursor: text;
}

.editor {
    z-index: 5;
    position: absolute;
    transform-origin: top left;
    border: 0.1rem solid black;
    cursor: pointer;
}

.dialog {
    z-index: 5;
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    user-select: none;
    transform-origin: center center;
    
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    
    width: auto;
    min-width: 15rem;
    max-width: 20rem;
    padding: 1rem;
    font-family: 'Gill Sans', 'Helvetica', 'Arial', sans-serif;
    font-size: 1rem;
    border: 0.1rem solid black;
    box-shadow: 0 2rem 3rem rgba(0,0,0,0.3);

    background-color: white;
    color: black;
    cursor: move;

    pointer-events: auto;
}

.form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.input {
    width: 100%;
    max-width: 10rem;
    text-align: center;
    cursor: text;
}

.toolbar {
    background-color: black;
    border: none;
    width: 100%;
    height: 10%;
    color: white;
    top: 1rem;
    left: 1rem;
    right: 1rem;
    cursor: pointer;
}

.selection-area {    
    z-index: 8;

    position: absolute;
    background-color: rgba(0,0,0,0.1);
    border: 0.1rem dashed black;
    cursor: crosshair;
    pointer-events: none;
}

.result {
    z-index: 9;

    position: absolute;
    overflow: auto;
    transform-origin: center center;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 0.5rem;

    min-width: 4rem;
    min-height: 2rem;
    font-family: 'Gill Sans', 'Helvetica', 'Arial', sans-serif;
    font-size: 1rem;
    font-weight: 100;
    border: 0.1rem solid black;
    background-color: white;
    box-shadow: 0 2rem 3rem rgba(0,0,0,0.3);
    color: black;
    cursor: move;
}

.submit {
    z-index: 12;

    font-family: 'Gill Sans', 'Helvetica', 'Arial', sans-serif;
    font-size: 1rem;
    font-weight: 100;

    background-color: black;
    color: white;
    border: none;
    border-radius: 2rem;

    min-width: 6rem;
    padding: 0.4rem 1rem;
    cursor: pointer;
}

.btn {
    z-index: 11;

    font-family: 'Gill Sans', 'Helvetica', 'Arial', sans-serif;
    font-size: 1rem;
    font-weight: 100;

    background-color: black;
    color: white;
    border: none;

    padding: 0.3rem;
    min-width: 2rem;
    cursor: pointer;
}

.btn:hover {
    background-color: gray;
    cursor: pointer;
}

.selected {
    box-shadow: 0rem 0rem 0.3rem 0.3rem red;
    border: 0.01rem solid red;
}

.inEditMode {
    background-color: rgba(255, 0, 0, 0.7);
}

.inEditMode:hover {
    background-color: rgba(255, 0, 0, 0.5);
}

@media print {
    * {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
        color-adjust: exact;
    }

    .vertex {
        background-color: white;
        border: 0.1rem solid black;
        color: black;
    }

    .toolbar, .selection-area, .editor {
        display: none;
    }
}

.toolbar {
    overflow: hidden;
    z-index: 13;
    cursor: pointer;
}

.dropdown {
    float: left;
    z-index: 13;
    cursor: pointer;
}

.dropdown-content {
    position: absolute;
    display: none;
    z-index: 14;
    cursor: pointer;
}

.dropdown-content .dropdown-button {
    display: block;
    min-width: 20rem;
    text-align: left;
    z-index: 14;
    cursor: pointer;
}

.dropdown-button {
    background-color: rgb(180, 180, 180);
    color: black;
    cursor: pointer;
}

.dropdown-button:hover {
    background-color: rgb(200, 200, 200);
    color: black;
}

.dropdown:hover .dropdown-content {
    display: block;
    z-index: 14;
}

.controls-dialog {
    position: fixed;
    padding: 1.7rem;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 1rem;
    height: 10rem;
    z-index: 10;
    text-align: center;
    
    width: auto;
    min-width: 15rem;
    max-width: 20rem;
    border: 0.1rem solid black;
    box-shadow: 0 2rem 3rem rgba(0,0,0,0.3);

    background-color: white;
    color: black;
    cursor: pointer;

}

.controls-title {
    font-weight: bold;
}

.controls {
    font-size: 0.8rem;
    text-align: left;
    padding: 0.2rem;
}