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30 August 2024

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*{
            margin: 0;
            padding: 0;

}
        body{
            background-color: black;
            width: 100vw;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            box-sizing: border-box;
        }
        /*papel aberto com tamanho de background inicial 0 de altura e 90% da largura por causa da perspectiva */
        .container{
            background-image: linear-gradient(white,gray);
            width: 30px;
            height: 60px;
            transform:  perspective(150px) rotateY(-30deg);
            transform-style: preserve-3d;
            transform-origin: left;
            background-size: 90% 12px;
            background-repeat: no-repeat;
            background-position: 100% center;
        }
        /*rolo superior posicionado no topo do centro */
        .upper{
            position: absolute;
            top: 30%;
            background: rgb(255, 255, 255);
            width: 30px;
            height: 10px;
            display: flex;
            align-items: center;
            box-sizing: border-box;
            border-radius: 10px;

}
        /*esfera do rolo superior */
        .upper::before{
            position: absolute;
            left: 70%;
            content: '';
            background: black;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            border:solid 0.5px white;
        }
        /*rolo inferior posicionado no botão do meio */
        .lower{
            margin-top: 6%;
            background: rgb(255, 255, 255);
            width: 30px;
            height: 10px;
            display: flex;
            align-items: center;
            position: absolute;
            top: 50%;
            box-sizing: border-box;
            border-radius: 10px;
        }
        /* esfera do rolo inferior */
        .lower::before{
            position: absolute;
            left: 70%;
            content: '';
            background: black;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            border:solid 0.5px white;
        }
        /* animacao do rolos superior e inferior sincronizadas manualmente com a  abertuda do background ao passar o mouse sobre o container*/
        .container:hover .upper{
            animation: effectupperANDsync 1s linear forwards;
        }
        .container:hover .lower{
            animation: effectlowerANDsync 1s linear forwards;
        }
        /*texto dentro sincronizado com o final */
        .container:hover .textInside{
            animation: syncText 1s linear forwards;
            
        }
        /*abertura do papel */
        .container:hover{
            animation: perspectiveANDbackground 0.75s linear forwards;
        }

/*animacoes para sincronizar  e sumir por causa da perspectiva, bem como  diminuir a altura para fazer um efeito que está consumindo o papel(pode ser ajustada) */
        @keyframes effectlowerANDsync{
            0%{
                transform: translateY(0) scaleY(1);
                opacity: 1;
            }
            29%{
                opacity: 1;
            }
            30%{
                opacity: 0;
            }
            100%{
                transform: translateY(27px) scaleY(0.1);
                opacity: 0;
            }
        }
        @keyframes effectupperANDsync{
            0%{
                transform: translateY(0) scaleY(1);
                opacity: 1;
            }
            29%{
                opacity: 1;
            }
            30%{
                opacity: 0;
            }
            100%{
                transform: translateY(-27px) scaleY(0.1);
                opacity: 0;
            }
        }
        /*mudando a perspectiva do papel, elevando para cim e tambem aumentando o tamanho, ao mesmo tempo  que o papel abre */
        @keyframes perspectiveANDbackground{

0%{
                transform: translateY(0) perspective(150px) rotateY(-30deg) scale(1);
                background-size: 90% 10px;
            }
            100%{
                transform: translateY(-30px) perspective(15000px) rotateY(30deg) scale(1.5);
                background-size: 100% 100%;
            }

}
        /*texto dentro */
        .textInside{
            opacity: 0;
            font-size: 4pt;
            font-family: monospace;
            text-align: center;
            word-wrap: break-word;
            max-width: 100%;
        }
        @keyframes syncText{
            0%{
                opacity: 0;
            }

99%{
                opacity: 0;
            }
            100%{
                opacity: 1;
            }
        }

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