* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    color: #fff;
}

.fundo__container {
    height: 100vh;
    background-image: url(imagens/1319567\ 1.png);
    background-repeat: no-repeat;
    background-size: cover;
}

.container {
    max-width: 960px;
    width: 100%;
    margin: 0 auto;
}

/*Reultilização*/

.frente__buttons__button,
.frente__relogio,
.frente__cronometro,
.back__container,
.form-atras__data__numbers__number,
.form-atras__button {
    background-color: #cccccc3b;
}

.frente__relogio,
.frente__cronometro,
.form-atras__resultado {
    box-shadow: 0px 0px 36px rgba(0, 0, 0, 0.9)
}

.frente__buttons__button,
.frente__relogio,
.frente__cronometro,
.back__container,
.form-atras__data__numbers__number,
.form-atras__button,
.form-atras__resultado,
.frente__relogio__number {
    border-radius: 12px;
}


.frente__cronometro__relogio,
.frente__cronometro__number__mile-segundos,
.frente__cronometro__buttons,
.frente__cronometro__buttons__button,
.frente__cronometro__number,
.form-atras__resultado{
    background-color: transparent;
}

/*Main do site/Rotação card*/
#switch:checked ~ .flip-container .flipper {
	transform: rotateY(180deg);
} 

.flipper{
	width: 100%;
	height: 100%;
	transition: transform 0.8s;
	transform-style: preserve-3d;
}

.flipper{
	position: relative;
}

.front, .back{
	position: absolute;
	width: 100%;
	height: 100%;
}

.back{
	transform: rotateY(180deg);
}

.front, .back{
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
}

.form-titulo {
    font-size: 18px;
}

.form-frent {
    height: 0;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

.form-frent--is-active {
    height: auto;
    opacity: 1;
    visibility: visible;
}

/*Main do site/Css do relogio*/

.option {
    padding-top: 5%;
    margin-bottom: 2%;
    text-align: center;
    font-size: 24px;
}

.option--is-active {
    margin: 0 52px;
}

.virar {
    position: relative;
    width: 100%;
    margin: 0 auto;
    margin-top: 2%;
}

/* Estilizando o switch */
.switch {
    position: relative;
    display: inline-block;
    width: 100%;
    height: 34px;
}

.switch input.virar {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 4em;
    margin: 0 auto;
    background-color: #ccc;
    border-radius: 34px;
    transition: .4s;
}

.slider::before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: #fff;
    border-radius: 50%;
    transition: .4s;
}

input:checked + .slider {
    background-color: #000; 
}   

input:checked + .slider:before {
    transform: translateX(26px);
}

.frente,
.back {
    text-align: center;
    margin-top: 10%;
}

.frente__buttons {
    margin-top: 40px;
    margin-bottom: 40px;
}

.frente__buttons__button {
    padding: 16px;
    margin: 0 16px;
    border: none;
    border-bottom: 2px solid #fff;
    font-size: 20px;
    cursor: pointer;
}

.frente__relogio {
    width: 50%;
    margin: 0 auto;
    padding: 16px;
    border: 2px solid #fff;
    
}

.frente__relogio__number {
    padding: 16px 2px;
    font-size: 36px;
}

.frente__relogio__number__small {
    font-size: 16px;
}

/*Main do site/Css do cronometro*/

.frente__cronometro {
    width: 50%;
    padding: 16px 0;
    margin: 0 auto;
    display: flex;
    flex-direction: column-reverse;
    border: 2px solid #fff;
}

.frente__cronometro__buttons {
    border-top: 1.5px solid #fff;
    margin-top: 24px;
}

.frente__cronometro__buttons__button {
    padding: 12px;
    margin-left: 8px;
    font-size: 18px;
    border: none;
    border-bottom: 1px solid #fff;
    cursor: pointer;
}

.frente__cronometro__number {
    font-size: 36px;
}

/*Main do site/Css do calcule aniversario*/

.back__title {
    padding-top: 16px;
}

.back__container {
    width: 70%;
    margin: -32px auto;
    border: 2px solid;
}

.form-atras__datas {
    width: 100%;
    margin: 7% auto;
    display: flex;
    justify-content: center;
}

.form-atras__data__numbers {
    width: 12%;
    margin: 0 2%;
    display: flex;
    flex-direction: column;
}

.form-atras__data__numbers__number {
    height: 70px;
    padding: 8px;
    margin-top: 10%;
    border: none;
    border-bottom: 1px solid #fff;
    color: #000;
    font-size: 24px;
    text-align: center;
}

.form-atras__data__numbers__number:focus,
.form-atras__data__numbers__number:active {
    outline: none;
    box-shadow: none;
    border-bottom: 2px solid #fff;
}

.form-atras__data__numbers__number::-webkit-inner-spin-button,
.form-atras__data__numbers__number::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.form-atras__container {
    display: flex;
    flex-direction: column;
}

.form-atras__button {
    width: 20%;
    margin: 0 auto;
    padding: 16px;
    border: none;
    border-bottom: 2px solid;
    cursor: pointer;
    font-size: 18px;
}

.form-atras__resultado {
    width: 50%;
    margin: 5% auto;
    padding: 16px;
    border: 2px solid;
    font-size: 24px;
    letter-spacing: 2px;
}

@media screen and (max-width: 767px) {
    .option {
        padding-top: 15%;
        margin-bottom: 5%;
    }
    
    .slider {
        width: 4em;
    }

    .frente__buttons {
        margin-top: 64px;
    }

    .frente__relogio,
    .frente__cronometro,
    .back__container {
        width: 80%;
    }

    /*AniverTime*/

    .back__container {
        margin-top: 0;
    }

    .back__title {
        font-size: 1.3em;
    }

    .form-atras__data__numbers {
        width: 50%;
    }

    .form-atras__data__numbers__number {
        width: 100%;
        margin-right: 16px;
    }

    .form-atras__button {
        width: 45%;
    }

    .form-atras__resultado {
        width: 90%;
        margin-top: 7%;
    }
}

@media screen and (min-width: 768px) and (max-width: 1023px) {
    .option {
        padding-top: 15%;
    }
    
    .slider {
        width: 4em;
    }

    /*AniverTime*/

    .form-atras__data__numbers {
        width: 20%;
    }

    .form-atras__button {
        width: 30%;
    }

    .form-atras__resultado {
        width: 90%;
    }
}