:root{
  --color-white: #FFFFFF;
  --color-grey-900: #48556A;
  --color-grey-500: #6E8098;
  --color-grey-400: #9DAEC2;
  --color-grey-200: #ECF2F8;
  
  --spacing-2000: 10rem;      /* 160px */
  --spacing-1300: 6.5rem;     /* 104px */
  --spacing-800: 4rem;        /*  64px */
  --spacing-700: 3.5rem;      /*  56px */
  --spacing-600: 3rem;        /*  48px */
  --spacing-500: 2.5rem;      /*  40px */
  --spacing-400: 2rem;        /*  32px */
  --spacing-300: 1.5rem;      /*  24px */
  --spacing-200: 1rem;        /*  16px */
  
  --font-size-md: 1.25rem;         /*  20px */
  --font-size-sm: 0.8125rem;       /*  13px */
}


/*----- article page -----*/
.article-page{
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-800) 0;
  background-color: var(--color-grey-200);
}

/*----- article card -----*/
.article{
  display: grid;
  gap: var(--spacing-400);
  border-radius: 0.625rem;
  width: 87.2%;
  margin: 0 auto;
  background-color: var(--color-white);
  font-family: "Manrope", sans-serif;
  max-width: 26.125rem;
  box-shadow: 0 0 50px -25px var(--color-grey-400);
}

.article__image{
  height: 200px;
  width: 100%;
  object-fit: cover;
  border-radius: 0.625rem 0.625rem 0 0;
}

/*----- article body -----*/
.article__body{
  display: flex;
  flex-direction: column;
  gap: var(--spacing-600);
}

.article__content{
  display: flex;
  flex-direction: column;
  gap: var(--spacing-300);
  padding: 0 var(--spacing-400);
}

.article__title{
  font-size: var(--font-size-md);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.0125em;
  color: var(--color-grey-900);
}

.article__description{
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.0012em;
  color: var(--color-grey-500);
}


/*----- article footer author-----*/
.article__footer{
  display: flex;
  justify-content: space-between;
  align-items: center;
  
  padding: 1.125rem var(--spacing-400);
}

.article__author{
  display: flex;
  align-items: center;
  gap: var(--spacing-200);
}

.article__author-avatar{
  height: 2.5rem;
  width: 2.5rem;
  border-radius: 50%;
}

.article__author-name{
  font-size: var(--font-size-sm);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.0012em;
  color: var(--color-grey-900);
}

.article__author-date{
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.0012em;
  color: var(--color-grey-400);
}


/*----- article footer share -----*/
.article__footer--dark{
  background-color: var(--color-grey-900);
}

.article__share{
  display: flex;
  align-items: center;
  gap: var(--spacing-300);
}

.article__link-text{
  text-transform: uppercase;
  font-size: var(--font-size-sm);
  line-height: 1.4;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--color-grey-400);
}

.article__social-links{
  display: flex;
  gap: var(--spacing-200);
}

.article__footer-hidden{
  display: none;
}

/*----- share button -----*/
.article__share-button{
  height: 2rem;
  width: 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  background-color: var(--color-grey-200);
  transition-property: transform, background-color;
  transition-duration: 0.25s;
  transition-timing-function: ease;
}

.article__share-button:hover{
  background-color: var(--color-grey-500);
  transform: scale(1.2);
  cursor: pointer;
}

.article__share-input{
  -webkit-appearance: none;
  display: none;
}

.article__share-icon{
  height: 1rem;
  width: 1rem;
}

.article__actions{
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.article__share-tablet{
  position: absolute;
  width: max-content;
  background-color: var(--color-grey-900);
  display: none;
  align-items: center;
  gap: var(--spacing-300);
  padding: 1.125rem 2rem;
  color: var(--color-white);
  border-radius: 10px;
  bottom: calc(100% + 20px);
}

.article__share-tablet--visible{
  display: flex;
}

.article__share-tablet::after{
  content: "";
  position: absolute;
  height: 0;
  width: 0;
  border-top: 1rem solid var(--color-grey-900);
  border-left: 1rem solid transparent;
  border-right: 1rem solid transparent;
  left: 50%;
  bottom: -0.75rem;
  transform: translateX(-50%);
}

.article__share-text{
  text-transform: uppercase;
  letter-spacing: 0.25em;
}

.article__share-links{
  display: flex;
  gap: var(--spacing-200);
}

.article__share-link{
  height: 20px;
  width: 20px;
  flex-shrink: 0;
}

.article__share-button:hover .article__share-icon path{
  fill: var(--color-white);
}

.article__share-input:checked + .article__share-button{
  background-color: var(--color-grey-500);
}

.article__share-input:checked + .article__share-button .article__share-icon path{
  fill: var(--color-white);
}

.social-media-button{
  cursor: pointer;
  transition-property: transform;
  transition-duration: 0.25s;
  transition-timing-function: ease;
}

.social-media-button:hover{
  transform: scale(1.2);
}

/*                 672px    */
@media (min-width: 42rem){
  .article{
    /*grid-template-columns: 229px 1fr;*/
    grid-template-columns: 1fr 1.7fr;
    width: 79.16%;
    max-width: 45.625rem;
  }
  
  .article__image{
    height: 100%;
    border-radius: 0.625rem 0 0 0.625rem;
  }
  
  .article__body{
    margin: var(--spacing-500) var(--spacing-400) var(--spacing-500) 0;
    gap: var(--spacing-300);
  }
  
  .article__content{
    padding: 0;
  }
  
  .article__footer{
    padding: 0;
  }
}