* {
    padding: 0;
    margin: 0;
    font-family: 'Roboto', sans-serif;
}

body {
    background-color: rgb(51, 51, 51);
    color: #999;
}

.container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    width: 1200px;
    margin: 0 auto;
    align-items: center;
    height: 100vh;
}

#my-canvas {
    background-color: rgb(61, 61, 61);
    box-shadow: 0px 1px 5px rgb(20, 20, 20);
    border-radius: 4px;
}

.section {
    background-color: rgb(61, 61, 61);
    padding: 1em;
    margin: 0.7em;
    color: rgb(240, 240, 240);
    border-radius: 4px;
    box-shadow: 0px 1px 5px rgb(20, 20, 20);
}

h1,
h2 {
    text-align: center;
}

button {
    background-color: rgb(97, 97, 97);
    border: 0;
    color: rgb(240, 240, 240);
    padding: 0.5em 1em;
    font-size: 1em;
    border-radius: 1em;
}

button:hover {
    background-color: rgb(209, 127, 46);
    cursor: pointer;
}

button:active {
    transform: translateY(2px);
}

button:focus {
    outline: 0;
}

.start-stop {
    text-align: center;
    margin: 1em;
}

input[type="number"] {
    background-color: transparent;
    border: none;
    border-bottom: 1px solid #999;
    font-size: 1em;
    text-align: center;
    color: rgb(240, 240, 240);
}

input[type="number"]:focus {
    outline-width: 0;
    border-bottom: 1px solid rgb(240, 240, 240);
    transition: 0.2s ease-in;
}

.upload-group {
    text-align: center;
}

#upload-problem {
    text-align: center;
}

#user-file {
    width: 0.1px;
    height: 0.1px;
    opacity: 0;
    overflow: hidden;
    position: absolute;
    z-index: -1;
}

#user-file+label {
    font-size: 1em;
    font-weight: 700;
    padding: 0.5em 1em;
    margin: 0.5em;
    color: white;
    border-radius: 1em;
    background-color: rgb(97, 97, 97);
    display: inline-block;
    cursor: pointer;
    user-select: none;
}

#user-file:focus+label,
#user-file+label:hover {
    background-color: rgb(209, 127, 46);
}

#user-file+label:active {
    transform: translateY(2px);
}

h3 {
    margin-bottom: 0.4em;
}

.red {
    color: rgb(251, 71, 71);
}

.green {
    color: rgb(74, 165, 74);
}

.img-container {
    height: 5em;
    text-align: center;
}

.img-container img {
    max-height: 100%;
}