/*-----------------*/
/*CUSTOM PROPERTIES*/
/*-----------------*/
:root {
  --clr-primary-400: 136, 65%, 51%;

  --clr-secondary-400: 192, 70%, 51%;

  --clr-accent-300: 233, 27%, 49%;
  --clr-accent-400: 233, 26%, 24%;

  --clr-neutral-900: 0, 0%, 0%;
  --clr-neutral-400: 233, 8%, 62%;
  --clr-neutral-300: 220, 16%, 96%;
  --clr-neutral-200: 0, 0%, 98%;
  --clr-neutral-100: 0, 0%, 100%;

  --ff-primary: 'Public Sans', sans-serif;

  --fs-900: 3.4375rem; /*55px*/
  --fs-800: 2.25rem; /*36px*/
  --fs-700: 1.875rem; /*30px*/
  --fs-600: 1.5rem; /*24px*/
  --fs-500: 1.25rem; /*20px*/
  --fs-400: 1.125rem; /*18px*/
  --fs-300: 1rem; /*16px*/ 
  --fs-200: .875rem; /*14px*/
  --fs-body: var(--fs-300);
  --fs-nav: var(--fs-500);
  --fs-primary-heading: var(--fs-800);
  --fs-secondary-heading: var(--fs-700);
  --fs-sub-heading: var(--fs-500);
  --fs-article-primary-heading: var(--fs-400);
  --fs-article-pre-heading: var(--fs-200);

  --fw-light: 300; 
  --fw-regular: 400;
  --fw-bold: 700;

  --space-100-rem: .5rem;
  --space-200-rem: 1.5rem;
  --space-300-rem: 2.5rem;
  --space-400-rem: 3.5rem;
  --space-700-rem: 6.5rem;

  --space-100-em: .5em;
  --space-200-em: 1.5em;
  --space-300-em: 2.5em;
  --space-400-em: 3.5em;
  --space-700-em: 6.5em;

  --stack-important: 999;
  --stack-infront: 1;
  --stack-regular: 0;
  --stack-behind: -1;
}

@media (min-width: 900px) {
  :root {
    --fs-body: var(--fs-400);
    --fs-nav: var(--fs-300);
    --fs-primary-heading: var(--fs-900);
    --fs-secondary-heading: var(--fs-800);
    --fs-sub-heading: var(--fs-600);
    --fs-article-primary-heading: var(--fs-500);
    --fs-article-pre-heading: var(--fs-300);
  }
}


/*-----------------*/
/*RESET            */
/*-----------------*/
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
  font: inherit;
}

h1,
h2,
h3 {
  line-height: 1.1;
}
h4,
h5,
h6 {
  line-height: 1.3;
}

a {
  text-decoration: none;
}

ul {
  list-style-type: none;
}

picture, img {
  max-width: 100%;
  display: block;
}

button {
  cursor: pointer;
  border: 0;
  background-color: transparent;
  text-decoration: none;
}

body {
  line-height: 1.5;
  font-family: var(--ff-primary);
  font-weight: var(--fw-regular);
  background-color: hsl(var(--clr-neutral-300));
  color: hsl(var(--clr-neutral-400));
}


/*-----------------*/
/*UTILITY CLASSES  */
/*-----------------*/
.bg-primary-400 {
  background-color: hsl(var(--clr-primary-400));
}
.bg-secondary-400 {
  background-color: hsl(var(--clr-secondary-400));
}
.bg-accent-400 {
  background-color: hsl(var(--clr-accent-400));
}
.bg-neutral-400 {
  background-color: hsl(var(--clr-neutral-400));
}
.bg-neutral-300 {
  background-color: hsl(var(--clr-neutral-300));
}
.bg-neutral-200 {
  background-color: hsl(var(--clr-neutral-200));
}
.bg-neutral-100 {
  background-color: hsl(var(--clr-neutral-100));
}

.primary-heading {
  font-size: var(--fs-primary-heading);
  font-weight: var(--fw-light);
  color: hsl(var(--clr-accent-400));
}
.secondary-heading {
  font-size: var(--fs-secondary-heading);
  font-weight: var(--fw-light);
  color: hsl(var(--clr-accent-400));
}
.sub-heading {
  font-size: var(--fs-sub-heading);
  color: hsl(var(--clr-accent-400));
}
.article-primary-heading {
  font-size: var(--fs-article-primary-heading);
  color: hsl(var(--clr-accent-400));
}
.article-pre-heading {
  margin-bottom: .5em;
  font-size: var(--fs-article-pre-heading);
  color: hsl(var(--clr-neutral-400));
}

.fw-light {
  font-weight: var(--fw-light);
}
.fw-regular {
  font-weight: var(--fw-regular);
}
.fw-bold {
  font-weight: var(--fw-bold);
}

.padding-block-extra-small {
  padding-block: var(--space-100-em);
}
.padding-block-small {
  padding-block: var(--space-200-em);
}
.padding-block-medium {
  padding-block: var(--space-300-em);
}
.padding-block-large {
  padding-block: var(--space-400-em);
}

.flow-gap-extra-small {
  --flow-gap: var(--space-100-rem);
}
.flow-gap-small {
  --flow-gap: var(--space-200-rem);
}
.flow-gap-medium {
  --flow-gap: var(--space-300-rem);
}
.flow-gap-large {
  --flow-gap: var(--space-400-rem);
}

.text-flow-gap-extra-small {
  --text-gap: var(--space-100-rem);
}
.text-flow-gap-small {
  --text-gap: var(--space-200-rem);
}
.text-flow-gap-medium {
  --text-gap: var(--space-300-rem);
}
.text-flow-gap-large {
  --text-gap: var(--space-400-rem);
}

.wrapper {
  --gap: 2em;
  --full: minmax(var(--gap), 1fr);
  --content: min(calc(100% - var(--gap) * 2), 1300px);

  display: grid;
  grid-template-columns: 
    [full-start] var(--full)
    [content-start] var(--content) [content-end]
    var(--full) [full-end];
}

.wrapper > *,
.full > .wrapper-inner,
.full > .wrapper-break {
  grid-column: content;
}

.full {
  grid-column: full;
  display: grid;
  grid-template-columns: inherit;
}

.flow > *:not(:last-child) {
  margin-bottom: var(--flow-gap, 1rem);
}

.text-flow > *:not(:last-child) {
  margin-bottom: var(--text-gap, 1rem);
}

.button--primary {
  color: hsl(var(--clr-neutral-100));
  font-weight: var(--fw-bold);
  padding: .6em 2em;
  border-radius: 50px;
  background-image: linear-gradient(to right, hsl(var(--clr-primary-400)), hsl(var(--clr-secondary-400)));
  transition: background-image .3s ease-in-out;
}
.button--primary:hover {
  background: none;
  color: hsl(var(--clr-neutral-900));
  outline: 2px solid hsl(var(--clr-primary-400));
}
footer .button--primary:hover {
  color: hsl(var(--clr-neutral-100));
}

.hide-mobile {
  display: none;
}

.toggled {
  display: none;
}

@media (min-width: 900px) {
  .padding-block-large {
    padding-block: var(--space-700-em);
  }

  .full > .wrapper-break {
    grid-column: content-start / full-end;
  }

  .hide-mobile {
    display: block;
  }

  .hide-desktop {
    display: none;
  }

  .flow-gap-none {
    --flow-gap: 0;
  }

  .text-flow-gap-none {
    --text-gap: 0;
  }
}


/*-----------------*/
/*Main             */
/*-----------------*/
/*Navbar*/
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__nav {
  position: fixed;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  width: 85%;
  padding: 1.8em;
  border-radius: .5em;
  text-align: center;
  box-shadow: 0 10px 200px hsl(var(--clr-neutral-900));
  transition: top .4s ease-in-out;
  z-index: var(--stack-important);
}

.open {
  top: 4.5em;
}

.navbar__nav-link {
  font-size: var(--fs-nav);
  color: hsl(var(--clr-accent-400));
}

.active {
  font-weight: var(--fw-bold);
}

/*Hero*/
.hero {
  position: relative;
  text-align: center;
  overflow: hidden;
  z-index: var(--stack-infront);
}

.hero__background-image {
  position: absolute;
  content: "";
  top: -4em;
  left: 0;
  width: 100%;
  z-index: var(--stack-behind);
}

.hero__image {
  margin-top: -7em;
}

/*Features*/
.features,
.features__list-item {
  text-align: center;
}

.features__list-item > img {
  margin-inline: auto;
}

/*Articles*/
.article {
  --card-padding: 1.4em;

  display: grid;
  grid-template-rows: 200px auto;
  border-radius: .5em;
  overflow: hidden;
}

.article > img {
  height: 100%;
  width: 100%;
  object-fit: cover;
}

.article__content {
  padding: var(--card-padding);
}

/*Footer*/
.footer__items {
  text-align: center;
}

.footer__logo {
  display: inline-block;
}

.social__icons {
  display: flex;
  justify-content: center;
  gap: var(--space-100-em);
}

.footer__nav-link {
  color: hsl(var(--clr-neutral-300));
}

.footer__nav-link:hover {
  text-decoration: underline;
}

@media (min-width: 900px) {
  /*Navbar*/
  .navbar__nav {
    position: unset;
    transform: unset;
    width: auto;
    padding: 0;
    border-radius: 0;
    text-align: left;
    transition: unset;
    box-shadow: unset;
  }

  .navbar__nav-list {
    display: flex;
    gap: 2em;
  }

  .navbar__nav-link {
    font-size: var(--fs-nav);
    color: hsl(var(--clr-neutral-400));
  }

  .navbar__nav-link:hover {
    color: hsl(var(--clr-accent-300));
  }

  .active {
    color: hsl(var(--clr-accent-400));
  }

  /*Hero*/
  .hero {
    text-align: left;
  }

  .hero-grid {
    display: grid;
    grid-template-columns: .6fr 1fr;
    align-items: center;
  }

  .hero__background-image {
    top: -7em;
    left: unset;
    right: -30em;
    width: auto;
  }

  .hero__image {
    order: 1;
    width: 65%;
    margin-left: auto;
    transform: translateX(5em);
  }

  /*Features*/
  .features,
  .features__list-item {
    text-align: left;
  }

  .features__list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: var(--space-300-em);
  }

  .features__list-item > img {
    margin-inline: 0;
  }

  /*Articles*/
  .articles__list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: var(--space-300-em);
  }

  /*Footer*/
  .footer__items {
    text-align: left;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .footer__items > :last-child {
    text-align: right;
  }

  .social__icons {
    justify-content: flex-start;
  }

  .footer__nav {
    display: grid;
    place-content: center;
    grid-template-columns: repeat(2, max-content);
    grid-gap: var(--space-400-em);
  }
}