.container {
    display: flex;
}

.grid {
    width: 200px;
    height: 400px;
    display: flex;
    flex-wrap: wrap;
    background-color: #fff000;
}

.grid div {
    height: 20px;
    width: 20px;
}

.tetromino {
    background-color: blue;
}

.mini-grid {
    margin-left: 50px;
    width: 80px;
    height: 80px;
    display: flex;
    flex-wrap: wrap;
    background-color: #fff000;
}

.mini-grid div {
    height: 20px;
    width: 20px;
}

#start-button,
#new-game {
    font-size: 16px;
    margin-bottom: 20px;
    background-color: #0a0a23;
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 15px;
    min-height: 30px;
    min-width: 120px;
}

#start-button:hover,
#new-game:hover {
    background-color: red;
    color: white;
    transition: 0.7s;
}

body {
    background-color: #ecf0f1;
}

.outer-container {
    min-height: calc(100vh - 160px);
    width: 500px;
    margin: 0 auto;
}

.header {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: black;
    color: white;
}

.footer {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 20px;
    background-color: black;
    color: white;
    text-align: center;
}

.footer span {
    color: red;
}

.left {
    margin-left: 10px;
}