@import url("https://fonts.googleapis.com/css2?family=Balsamiq+Sans:wght@400;700&display=swap");
:root {
    --background-color: #7f7fd5;
    --background-secondary-color: #91eae4;
    --canvas-color: #f0f0f0;
    --text-color: rgba(255, 255, 255, 0.87);
    --sidebar-color: #343457;
    --button-color: #86a8e7;
    --hover-color: #7db3e3;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--background-color);
    background: linear-gradient( to right, var(--background-color), var(--button-color), var(--background-secondary-color));
    font-family: "Balsamiq Sans", cursive;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
}

h1 {
    font-size: 2.75rem;
    color: var(--text-color);
}

canvas {
    background-color: var(--canvas-color);
    display: block;
    border-radius: 5px;
    width: 800px;
    max-width: 96%;
}

.btn {
    cursor: pointer;
    border: 0;
    padding: 0.625rem 1.25rem;
    background-color: var(--button-color);
    color: var(--text-color);
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
}

.btn:focus {
    outline: 0;
}

.btn:hover {
    background-color: var(--hover-color);
}

.btn:active {
    transform: scale(0.98);
}

.rules-btn {
    position: absolute;
    top: 1.875rem;
    left: 1.875rem;
}

.rules {
    position: absolute;
    top: 0;
    left: 0;
    background-color: var(--sidebar-color);
    color: var(--text-color);
    min-height: 100vh;
    width: 400px;
    padding: 3rem;
    line-height: 1.5;
    transform: translateX(-400px);
    transition: transform 1s ease-in-out;
}

.rules.show {
    transform: translateX(0);
}