body,
header {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f4f4;
}

.navbar {
    background-color: #2c3e50;
    overflow: hidden;
}

.navbar-item {
    float: left;
    display: block;
    color: #ecf0f1;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.navbar-current-item {
    background-color: #3498db;
    float: left;
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    border-radius: 5px;
}

.navbar-item:hover {
    background-color: hwb(204 0% 15%);
    color: white;
    box-shadow: inset 0 0 1px black;
}

.navbar-current-item:hover{
    background-color: hwb(204 0% 45%);
    color: white;
    box-shadow: inset 0 0 1px black;
}

#containerContainer {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    flex-direction: column;
}

#startButtonContainer {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 50vh;
}

#gameButtonContainer {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

button {
    background-color: #9cd7ff;
    font-size: large;
    margin: 2px;
}

button:hover {
    background-color:#0099ff;
    color: white;
}

.gridContainer {
    display: flex;
    align-items: center;
    margin-top: 10px;
}

.cell {
    width: 50px;
    height: 50px;
    background-color: gray;
    border: 1px solid black;
}

.hover-color {
    background-color: yellow !important;
}

.clicked-color {
    background-color: red;
}