style.css

html {
    height: 100%;
    width: 100%;
    max-height: 100%;
    max-width: 100%;
    font-family: 'Roboto', sans-serif;
}

body {
    height: 100%;
    width: 100%;
    margin: 0;
    display: flex;
    flex-direction: column;
}

h1 {
    font-size: 2em;
    font-weight: bold;
    text-align: center;
}

.tower-wrapper {
    flex: 1 1 0;
    flex-direction: column;
    display: flex;
}

.tower {
    flex: 1 1 0;
    display: flex;
    margin: 20px;
}

.stack {
    flex: 1 1 0;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    flex-direction: column;
    margin: 5px;
    border-radius: 10px;
    background-color: #f0f0f0;
}

.footer {
    height: 40px;
    background-color: green;
    margin: 20px;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.box {
    flex: 1;
    height: 40px;
    background-color: red;
    border-radius: 10px;
    margin: 5px;
}

.base {
    height: 30px;
    width: 100%;
    background-color: #676767;
    border-radius: 10px;
}

.ring-1 {
    height: 20px;
    width: 80%;
    border-radius: 5px;
    background-color: #31af2e;
}

.ring-2 {
    height: 20px;
    width: 72%;
    border-radius: 5px;
    background-color: #55c04d;
}

.ring-3 {
    height: 20px;
    width: 64%;
    border-radius: 5px;
    background-color: #7fcc71;
}

.ring-4 {
    height: 20px;
    width: 56%;
    border-radius: 5px;
    background-color: #a4d792;
}

.ring-5 {
    height: 20px;
    width: 48%;
    border-radius: 5px;
    background-color: #bedeb0;
}

.tower-wrapper span,
#target {
    font-size: 1.5em;
    font-weight: bold;
    margin-left: 20px;
}

.footer span {
    font-size: 1.5em;
    font-weight: bold;
    color: #f0f0f0;
}

button:disabled,
button[disabled]{
    border: 1px solid #999999;
    background-color: #cccccc;
    color: #666666;
}

/* Remove default button styles */

button {
    all: unset;
    cursor: pointer;
}

button:focus {
    outline: orange 5px auto;
}