:root {
  --ff-sans: "IBM Plex Sans", sans-serif;
  --ff-serif: "IBM Plex Serif", serif;

  /* small screen font-sizes */
  --fs-200: 0.75rem;
  --fs-300: 1rem;
  --fs-400: 1.25rem;
  --fs-500: 1.375rem;
  --fs-600: 1.75rem;
  --fs-900: 2.125rem;

  --fw-200: 200;
  --fw-300: 300;
  --fw-400: 400;
  --fw-700: 700;

  --clr-neutral-100: #fff;
  --clr-neutral-200: #eef1f6;
  --clr-neutral-300: #a9afbc;
  --clr-neutral-400: #737b8c;
  --clr-neutral-500: #434956;
  --clr-neutral-900: #020203;

  --clr-primary-300: #f3f7ff;
  --clr-primary-400: #8ea8da;

  --br: 1rem;
}

@media (min-width: 40em) {
  :root {
    --fs-500: 1.75rem;
    --fs-600: 2.125rem;
    --fs-900: 4.25rem;
  }
}

/* reset */

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

h1,
.h1,
h2,
.h2,
h3,
.h3,
h4,
.h4 {
  line-height: 1;
}

body,
h1,
h2,
h3,
p,
dl,
dd,
figure {
  margin: 0;
}

ul[class],
ol[class] {
  list-style: none;
  padding: 0;
}

input,
button,
textarea,
select {
  font: inherit;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--br);
}

body {
  line-height: 1.3;
  font-family: var(--ff-sans);
  font-size: var(--fs-400);
  font-weight: 300;
  padding: 1.5rem;
}

.bg-primary-300 {
  background-color: var(--clr-primary-300);
  border-radius: 1rem;
}

/* typography */

h1,
h2,
h3,
.section-subtitle,
.text-serif {
  font-family: var(--ff-serif);
  font-weight: var(--fw-200);
}

a {
  font-weight: var(--fw-700);
  font-size: var(--fs-300);
  color: var(--clr-neutral-900);
}

a:hover,
a:focus {
  color: var(--clr-primary-400);
}

.text-500 {
  font-size: var(--fs-500);
}

.page-title {
  font-size: var(--fs-900);
}

.page-intro {
  font-size: var(--fs-600);
}

.section-title {
  font-size: var(--fs-600);
  color: var(--clr-neutral-400);
}

.section-subtitle {
  font-size: var(--fs-600);
}

.btn {
  display: inline-block;
  cursor: pointer;
  border: 0;
  background: none;
  font-weight: var(--fw-700);
  font-size: var(--fs-300);
  font-family: var(--ff-sans);
  text-decoration: none;
  color: var(--clr-neutral-900);
}

.btn::after {
  content: "\203A";
  margin-left: 1em;
  font-weight: var(--fw-300);
}

.btn:hover,
.btn:focus {
  color: var(--clr-primary-400);
}

/* general layout */

section {
  padding: 2.5rem 0;
}

@media (min-width: 40em) {
  section {
    padding: 3.5rem 0;
  }
}

.container {
  max-width: 50rem;
  margin: 0 auto;
}

.flow-content > * + * {
  margin-top: var(--flow-spacer, 1em);
}

.split {
  display: flex;
  flex-direction: column;
}

.split > * + * {
  margin: 4rem 0 0 0;
  padding: 1rem;
}

.split > * {
  flex-basis: 100%;
}

@media (min-width: 40em) {
  .split {
    flex-direction: row;
  }

  .split > * + * {
    margin: 0 0 0 2.5rem;
  }
}

.xl-space {
  margin-top: 5rem !important;
}

/* components */
/* 
.primary-header {
  background-image: url(./assets/images/hero.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  border-radius: var(--br);
  padding: 2rem;
  background-color: var(--clr-primary-400);
  min-height: 50vh;
} */

.primary-header {
  background-size: cover;
  border-radius: var(--br);
  padding: 2rem;
  background-color: var(--clr-primary-400);
  min-height: 50vh;
  display: flex;
  flex-direction: column;
}

.primary-header .container {
  margin-top: auto;
  margin-bottom: auto;
  width: 100%;
}

.primary-header .container > * {
  max-width: 12ch;
}

.page-home .primary-header {
  background-image: url(./assets/images/hero.jpg);
  background-position: center center;
}

.page-blog .primary-header {
  background-image: url(./assets/images/blog.jpg);
  background-position: left center;
}

.page-article .primary-header {
  background-image: url(./assets/images/article.jpg);
  background-position: left center;
  position: relative;
  overflow: hidden;
  z-index: 0;
}

.page-article .primary-header::after {
  content: "";
  position: absolute;
  top: 0px;
  left: 0px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.45),
    rgba(255, 255, 255, 0)
  );
  z-index: 1;
}

.primary-nav {
  position: fixed;
  bottom: 0.5em;
  left: 0.5em;
  right: 0.5em;
  border-radius: var(--br);
  background: var(--clr-neutral-900);
  font-family: var(--ff-serif);
  z-index: 9999;
}

.primary-nav ul {
  display: flex;
  justify-content: space-around;
  margin: 0;
  padding: 0.8em 0;
}

.primary-nav li {
  line-height: 0;
}

.primary-nav a {
  color: var(--clr-neutral-200);
  text-decoration: none;
}

@media (min-width: 40em) {
  .primary-nav {
    position: static;
    background: transparent;
  }

  .primary-nav a {
    color: inherit;
    text-decoration: none;
  }

  .primary-header__inner {
    display: flex;
    justify-content: space-between;
  }

  .primary-nav ul {
    padding: 0;
  }

  .primary-nav li {
    margin-left: 2em;
  }
}

.secondary-navigation {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.secondary-navigation > a:last-child {
  margin-left: auto;
}

.categories {
  margin: 0%;
  display: flex;
  margin: 2rem 0px;
  gap: 1rem;
}

.categories button {
  cursor: pointer;
  border: 0px;
  text-transform: uppercase;
  background: transparent;
  font-size: var(--fs-200);
}

.article-preview a {
  display: block;
  text-decoration: none;
  font-weight: var(--fw-300);
  font-size: var(--fs-400);
}

.article-preview {
  position: relative;
  z-index: 0;
}

.article-preview a:hover,
.article-preview a:focus {
  color: inherit;
}

.article-preview a::before {
  content: "";
  position: absolute;
  top: -1em;
  bottom: -1em;
  right: -1em;
  left: -1em;
  z-index: -1;
  border-radius: var(--br);
  box-shadow: 0;
  box-shadow: 0 0.75rem 1.25rem rgba(0, 0, 0, 0.2);
  transition: opacity 350ms ease;
  opacity: 0;
}

.article-preview:hover a::before {
  opacity: 1;
}

.article-preview h3 {
  font-size: var(--fs-500);
}

.article-preview img {
  object-fit: cover;
  height: 12.5rem;
  width: 100%;
}

.article-preview .info {
  display: flex;
  font-weight: var(--fw-400);
  font-size: var(--fs-200);
  color: var(--clr-neutral-400);
  margin-top: 1rem;
}

.article-preview .info > *:first-child {
  margin-right: 2rem;
}

.call-to-action form {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.call-to-action form > div {
  flex-basis: 100%;
  flex-shrink: 1;
  flex-grow: 1;
}

.call-to-action input {
  width: 100%;
  border: 0;
  border-bottom: 2px solid var(--clr-neutral-300);
}

.call-to-action input:focus {
  border-color: var(--clr-primary-400);
  border-width: 4px;
}

.call-to-action input::placeholder {
  color: var(--clr-neutral-300);
  opacity: 1;
}

.call-to-action label {
  display: block;
  margin-bottom: 0.5em;
  font-size: var(--fs-300);
  font-weight: var(--fw-400);
}

.call-to-action button {
  align-self: flex-start;
}

@media (min-width: 40em) {
  .call-to-action form {
    flex-direction: row;
  }

  .call-to-action button {
    align-self: center;
  }
}

.primary-footer__inner {
  --border: 2px solid var(--clr-neutral-200);
  border-top: var(--border);
  border-bottom: var(--border);
  padding: 3em 0;
  margin: 2em 0;
}

@media (max-width: 40em) {
  .footer-nav {
    display: flex;
    flex-direction: column;
  }
  .footer-nav dl {
    margin-bottom: 4rem;
  }
}

footer {
  padding-bottom: 1em;
}

.footer-nav {
  display: flex;
}

.footer-nav a {
  text-decoration: none;
  border: none;
}

.footer-nav > *:first-child {
  margin-right: 4em;
}

.footer-social {
  display: flex;
  gap: 2em;
}

.footer-social a {
  font-weight: var(--fw-200);
  text-decoration: none;
  border: none;
}

/* homepage styles */

.intro {
  --flow-spacer: 2em;
}

.bg-accent {
  padding: 1rem;
}

/* Blog page styling*/

.article-grid {
  display: grid;
  gap: 3em 2em;
  grid-template-columns: repeat(6, 1fr);
}

.article-grid > * {
  grid-column: 1 / -1;
}

@media (min-width: 30em) {
  .article-grid > *:not(:first-child) {
    grid-column: span 3;
  }
}

@media (min-width: 40em) {
  .article-grid article:first-child {
    grid-column: 1 / -1;
  }

  .article-grid > .article-preview:first-child {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr min-content 1fr;
    gap: 1em 2em;
  }

  .article-grid > .article-preview:first-child img {
    grid-row: span 3;
    height: 22rem;
  }

  .article-grid > .article-preview:first-child > h3 {
    margin-top: auto;
  }

  .article-grid > *:nth-child(2),
  .article-grid > *:nth-child(3) {
    grid-column: span 3;
  }
  .article-grid > *:nth-child(4),
  .article-grid > *:nth-child(5),
  .article-grid > *:nth-child(6) {
    grid-column: span 2;
  }
  .article-grid > *:nth-child(7),
  .article-grid > *:nth-child(8) {
    grid-column: span 3;
  }
}

/* induvisual article page */
.article-full {
  max-width: 40em;
  /* margin-left: auto;
  margin-right: auto; */
  margin: 0px auto;
}

.padding {
  padding: 1rem;
}