@font-face {
    font-family: 'pixeloperator';
    src: url('fonts/pixeloperator.ttf') format('truetype');
}

html,
body {
    background: url('dark-stars-tile.gif') repeat;
    background-color: #000;
    color: #00ffff;
    font-family: 'pixeloperator', monospace;
    font-size: 20px;
    margin: 0;
    padding: 0;
    text-transform: lowercase;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
}

/* main box */
.dialog-box {
    background: rgba(0, 0, 0, 0.85);
    border: 3px solid #00ffff;
    padding: 2.4rem;
    width: 90%;
    max-width: 520px;
    text-align: center;
    border-radius: 0;
    box-shadow: 0 0 18px rgba(0, 255, 255, 0.25);
    margin-top: 4rem;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.8rem;
    color: #00ffff;
    margin: 0 0 .4em 0;
    text-shadow: 2px 2px #000;
}

h2 {
    font-size: 1.6rem;
    color: #ff66cc;
    margin: 0 0 1.4em 0;
    text-shadow: 2px 2px #000;
}

p {
    margin-bottom: 1.6em;
    font-size: 1.2rem;
}

/* button */
.comms-button {
    display: inline-block;
    padding: 0.55rem 1.2rem;
    border-radius: 0;
    border: 3px solid #00ffff;
    color: #00ffff;
    text-decoration: none;
    font-weight: bold;
    font-size: 1rem;
    transition: 0.15s ease;
}

.comms-button:hover {
    background: #00ffff;
    color: #000;
}

/* footer */
footer {
    text-align: center;
    font-size: 0.9rem;
    color: #00ffff;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

/* mobile */
@media (max-width: 640px) {

    html,
    body {
        font-size: 22px;
        padding: 1rem;
    }

    .dialog-box {
        padding: 2rem;
        max-width: 95%;
        margin-top: 3rem;
        margin-bottom: 1rem;
    }

    h1 {
        font-size: 2.4rem;
    }

    h2 {
        font-size: 1.4rem;
    }

    p {
        font-size: 1.2rem;
    }

    .comms-button {
        width: auto;
        padding: 0.7rem 1.3rem;
        font-size: 1.1rem;
        border-width: 3px;
    }

    footer {
        margin-top: 1.5rem;
    }
}