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

body {
    background: #ffda6a;
}

/* Estilos generales */

.image-container {
    width: 100%;
}

.image-container img {
    display: block;
    width: 100%;;
}

.borders {
    border-top: 2px solid #8c8c8c;
    border-bottom: 2px solid #8c8c8c;
}

.uppercase {
    text-transform: uppercase;
}

.border-right {
    padding-right: 15px;
    border-right: 2px solid #8c8c8c;
}

.columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

/* ->Estilos generales */

/* Periódico */

.newsletter {
    transform-style: preserve-3d;
    animation-duration: 0.4s;
    animation-iteration-count: 3;
    animation-timing-function: linear;
    animation-name: rotateNewsletter;
    transform: perspective(1000px) rotateZ(-10deg) rotateX(20deg) rotateY(8deg);
    -webkit-transform: perspective(1000px) rotateZ(-10deg) rotateX(20deg) rotateY(8deg);
    -moz-transform: perspective(1000px) rotateZ(-10deg) rotateX(20deg) rotateY(8deg);
    -ms-transform: perspective(1000px) rotateZ(-10deg) rotateX(20deg) rotateY(8deg);
    -o-transform: perspective(1000px) rotateZ(-10deg) rotateX(20deg) rotateY(8deg);
}

.newsletter .page {
    position: relative;
    max-width: 700px;
    margin: 100px auto;
    border: 2px solid #8c8c8c;
    padding: 0 10px;
    background: #f3f3f3;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    -ms-border-radius: 5px;
    -o-border-radius: 5px;
}

.newsletter .page::before {
    content: '';
    position: absolute;
    top: 9px;
    left: -13px;
    display: block;
    width: 100%;
    height: 100%;
    background: #f3f3f3;
    border: 2px solid #8c8c8c;
    border-radius: 3px;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    -ms-border-radius: 3px;
    -o-border-radius: 3px;
    z-index: -2;
}

.newsletter .page::after {
    content: '';
    position: absolute;
    top: 3px;
    left: -7px;
    display: block;
    width: 100%;
    height: 100%;
    background: #f3f3f3;
    border: 2px solid #8c8c8c;
    border-radius: 3px;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    -ms-border-radius: 3px;
    -o-border-radius: 3px;
    z-index: -1;
}

.newsletter h1 {
    padding: 1rem;
    text-align: center;
}

.newsletter .banner {
    padding: 0.5rem;
    display: flex;
    justify-content: space-between;
}

.newsletter h2 {
    text-align: center;
    padding: 0.5rem;
    font-size: 3.5rem;
}

.newsletter .news {
    margin-bottom: 10px;
    text-align: justify;
}

.newsletter h3 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

/* ->Periódico */

@keyframes rotateNewsletter {

    0% {
        transform: perspective(1000px) rotateZ(360deg) rotateX(20deg) rotateY(8deg);
        -webkit-transform: perspective(1000px) rotateZ(360deg) rotateX(20deg) rotateY(8deg);
        -moz-transform: perspective(1000px) rotateZ(360deg) rotateX(20deg) rotateY(8deg);
        -ms-transform: perspective(1000px) rotateZ(360deg) rotateX(20deg) rotateY(8deg);
        -o-transform: perspective(1000px) rotateZ(360deg) rotateX(20deg) rotateY(8deg);
}

    100% {
        transform: perspective(1000px) rotateZ(0) rotateX(20deg) rotateY(8deg);
        -webkit-transform: perspective(1000px) rotateZ(0) rotateX(20deg) rotateY(8deg);
        -moz-transform: perspective(1000px) rotateZ(0) rotateX(20deg) rotateY(8deg);
        -ms-transform: perspective(1000px) rotateZ(0) rotateX(20deg) rotateY(8deg);
        -o-transform: perspective(1000px) rotateZ(0) rotateX(20deg) rotateY(8deg);
}

  }