html {
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
}
h1 {
    font-size: 1.8rem;
    color: white;
}

.topnav {
    overflow: hidden;
    background-color: #0A1128;
}

body {
    margin: 0;
}

.content {
    padding: 50px;
}

.card-grid {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    grid-gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.card {
    background-color: white;
    box-shadow: 2px 2px 12px 1px rgba(140,140,140,.5);
}

.card-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: #034078
}

.state {
    font-size: 1.2rem;
    color:#1282A2;
}

button {
    border: none;
    color: #FEFCFB;
    padding: 15px 32px;
    text-align: center;
    font-size: 16px;
    width: 150px;
    border-radius: 4px;
    transition-duration: 0.4s;
}
.button-on {
    background-color:#034078;
}

.button-on:hover {
    background-color: #1282A2;
}

.button-off {
    background-color:#858585;
}
.button-off:hover {
    background-color: #252524;
}

.button-stop {
    background-color:#5e0f0f;
    width: 100%;
}
.button-stop:hover {
    background-color: #9b332c;
}