style.css

:root {
    --primary-dark: #333;
    --primary-light: #ededed;
    --secondary-light: #fefefe;
    --accent-color: #4CAF50;
    --hover-color: #3e8e41;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

html {
    position: relative;
    min-height: 100%;
}

body {
    background-color: var(--primary-light);
    color: var(--primary-dark);
	font-family: 'Arial', sans-serif;
    font-size: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.container {
    max-width: 77.5rem;
    margin: 0 auto;
}

.title {
    text-align: center;
    font-size: 3.6rem;
    color: var(--primary-dark);
    margin-bottom: 2rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

button {
    padding: 12px 20px;
    border: 1px solid var(--primary-dark);
    border-radius: 0.5rem;
    font-size: 1.2rem;
    font-weight: bold;
    background-color: var(--accent-color);
    color: white;
    cursor: pointer;
    transition: transform 0.2s, background-color 0.2s;
}

button.active {
    background-color: var(--primary-dark);
    color: var(--primary-light);
}

button:hover {
    background-color: var(--hover-color);
    transform: scale(1.05);
}

/* HEADER */
.title {
    text-align: center;
    font-size: 60px;
}

/* MAIN */
.settings {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    width: 250px;
    background-color: var(--secondary-light);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: rgba(0, 0, 0, 0.15) 0px 4px 12px;
}

.grid {
    display: grid;
    width: 500px;
    height: 500px;
    background-color: var(--secondary-light);
    box-shadow: rgba(0, 0, 0, 0.24) 0px 3px 8px;
}

.square-div {
    user-select: none;
}

input[type="color"] {
    border: none;
    width: 100%;
    padding: 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
	height: 3rem;
}

input[type="range"] {
    width: 100%;
}