.button {
    border: 1px solid;
    border-radius: 0;
    padding: 14px 30px 10px;
    display: inline-block;
    text-transform: uppercase;
    background: rgba(255,255,255,0.9);
    color: #333333;
    transition: 0.3s;
    margin: 20px 0;
    position: relative;
    width: auto;
}

.button.gray {
    color: #dc002e;
}

.button:hover,
.button:focus {
    text-decoration: none;
    color: white !important;
    background: #dc002e !important;
}

.button.red {
    color: white;
    background: #dc002e;
    border-color: rgba(255, 255, 255, 0.9);
}

.big-button {
    background: #333333;
    color: white;
    font-weight: bold;
    padding: 30px;
    width: calc(100% - 40px);
    display: block;
    text-align: center;
    font-size: 36px;
    margin: 20px auto 40px;
    transition: 0.3s;
    text-transform: uppercase;
}

.big-button:hover,
.big-button:focus {
    text-decoration: none;
    color: white;
}

@media (max-width: 767px) {
    .big-button {
        margin: 10px 20px;
    }
}

@media (max-width: 480px) {
    .big-button {
        font-size: 32px;
        padding: 20px;
    }
}