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

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

:root {
  /* Color */
  --white: hsl(0, 0%, 100%);
  --cyan: hsl(171, 66%, 44%);
  --blue: hsl(233, 100%, 69%);

  --neutral-400: hsl(201, 11%, 66%);
  --neutral-600: hsl(210, 10%, 33%);

  --footer-bg: hsla(201, 11%, 66%, 0.1);

  /* Box Shadow */
  --shadow-ios: 0 10px 20px 0 hsla(160, 64%, 72%, 0.5),
    inset 0 -3px 0 0 hsla(0, 0%, 0%, 0.15);
  --shadow-mac: 0 10px 20px 0 hsla(0, 0%, 0%, 0.1),
    inset 0 -3px 0 0 hsla(0, 0%, 0%, 0.15);

  /* Typography */
  --font-family: "Bai Jamjuree", sans-serif;
  --fw-regular: 400;
  --fw-semibold: 600;

  --text-sm: 1rem;
  --text-base: 1.125rem;

  --text-h1-sm: 2rem;
  --text-h1-md: 2.5rem;
  --text-h1-lg: 3rem;

  --text-h2-sm: 1.75rem;
  --text-h2-md: 2rem;
  --text-h2-lg: 2.25rem;

  --text-h3-sm: 1.5rem;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: var(--fw-regular);
  line-height: 1.5;
  text-align: center;

  color: var(--neutral-400);
  background: var(--white);

  display: flex;
  flex-direction: column;
  min-height: 100svh;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

ul {
  list-style: none;
}

a {
  color: var(--neutral-600);
  text-decoration: none;
  transition: color 280ms ease;
}

a:hover,
a:focus-visible {
  color: var(--cyan);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: 2rem;
}

.text-center {
  text-align: center;
}

h1 {
  font-size: var(--text-h1-sm);
  -webkit-margin-after: 1rem;
  margin-block-end: 1rem;
}

h2 {
  font-size: var(--text-h2-sm);
  -webkit-margin-after: 1rem;
  margin-block-end: 1rem;
}

h3 {
  font-size: var(--text-h3-sm);
  -webkit-margin-after: 0.5rem;
  margin-block-end: 0.5rem;
}

h1,
h2,
h3 {
  color: var(--neutral-600);
}

p {
  max-width: 36rem;
  margin-inline: auto;
}

.description {
  color: var(--neutral-400);
  font-size: var(--text-sm);
}

.hero {
  background-image: url("../assets/images/bg-header-mobile.png");
  background-repeat: no-repeat;
  background-size: 100% auto;
  text-align: center;

  padding-block: 3.5rem;
}

.hero figure {
  padding-block: 4rem;
}

.hero figure img {
  margin-inline: auto;
}

.subtitle {
  font-size: var(--text-sm);
  max-width: 34rem;
}

.button-group {
  -webkit-margin-before: 3rem;
  margin-block-start: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.button-group a:hover,
.button-group a:focus-visible {
  color: var(--white);
}

.btn {
  display: block;
  width: 100%;
  padding: 0.875rem 2.25rem;
  border-radius: 999px;
  font-weight: var(--fw-semibold);
  color: var(--white);
  transition: background-color 280ms ease, opacity 280ms ease;
  border: none;
  cursor: pointer;
  text-align: center;
}

.btn:hover,
.btn:focus-visible {
  opacity: 0.85;
}

.btn-ios {
  background-color: var(--cyan);
  box-shadow: var(--shadow-ios);
}

.btn-mac {
  background-color: var(--blue);
  box-shadow: var(--shadow-mac);
}

.snippets {
  padding-block: 6.5rem;
}

.snippet-showcase {
  -webkit-margin-before: 4rem;
  margin-block-start: 4rem;
  padding-inline: 2rem;

  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: 3.5rem;
}

.snippet-showcase img {
  margin-inline: auto;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.access-anywhere {
  padding-block: 5rem;
}

.access-anywhere figure {
  -webkit-margin-before: 4rem;
  margin-block-start: 4rem;
}

.device-image {
  margin-inline: auto;
}

.supercharge {
  padding-block: 3rem;
}

.supercharge h2 {
  -webkit-margin-after: 0.625rem;
  margin-block-end: 0.625rem;
}

.workflow-features {
  -webkit-margin-before: 5rem;
  margin-block-start: 5rem;

  display: grid;
  grid-template-columns: 1fr;
  gap: 3.5rem;
}

.workflow-features img {
  -webkit-margin-after: 2.5rem;
  margin-block-end: 2.5rem;
  margin-inline: auto;
}

.workflow-features h3 {
  -webkit-margin-after: 1.125rem;
  margin-block-end: 1.125rem;
}

.sponsors {
  padding-block: 5rem;
}

.sponsor-logos {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  gap: 3.5rem;
}

.cta {
  padding-block: 5rem;
}

footer {
  -webkit-margin-before: 5rem;
  margin-block-start: 5rem;
  background-color: var(--footer-bg);
  color: var(--neutral-600);
  padding-block: 3.25rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  align-items: center;
  gap: 2.5rem;
}

.footer-content figure {
  grid-column: 1 / 2;
  grid-row: 1 / 2;
}

.footer-content figure img {
  width: 3.5rem;
}

.footer-content nav {
  grid-column: 1 / 2;
  grid-row: 2 / 3;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  text-align: center;
}

.social-links {
  grid-column: 1 / 2;
  grid-row: 3 / 4;
  display: flex;
  gap: 2.5rem;
}

.social-links a:hover img,
.social-links a:focus-visible img {
  -webkit-filter: brightness(0) saturate(100%) invert(56%) sepia(74%)
    saturate(424%) hue-rotate(122deg) brightness(94%) contrast(91%);
  filter: brightness(0) saturate(100%) invert(56%) sepia(74%) saturate(424%)
    hue-rotate(122deg) brightness(94%) contrast(91%);
}

@media (min-width: 768px) {
  h1 {
    font-size: var(--text-h1-md);
  }

  h2 {
    font-size: var(--text-h2-md);
  }

  .description {
    max-width: 42rem;
  }

  .subtitle {
    max-width: 38rem;
  }

  .hero {
    background-image: url("../assets/images/bg-header-desktop.png");
  }

  .button-group {
    flex-direction: row;
    justify-content: center;
    gap: 1rem;
  }

  .btn {
    display: inline-block;
    width: -webkit-fit-content;
    width: -moz-fit-content;
    width: fit-content;
  }

  .workflow-features {
    grid-template-columns: repeat(3, 1fr);
  }

  .sponsor-logos {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .footer-content {
    grid-template-columns: auto 1fr auto;
    justify-items: start;
  }

  .footer-content nav {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
  }

  .footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, auto);
    gap: 0.75rem 2rem;
    text-align: left;
    justify-self: center;
    max-width: 30rem;
  }

  .social-links {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
  }
}

@media (min-width: 1280px) {
  h1 {
    font-size: var(--text-h1-lg);
  }

  h2 {
    font-size: var(--text-h2-lg);
  }

  .subtitle {
    font-size: 1.25rem;
  }

  .description {
    font-size: 1.125rem;
    max-width: 720px;
  }

  .hero {
    padding-block: 4.5rem;
  }

  .hero figure {
    padding-block: 3.5rem;
  }

  .snippets {
    padding-block: 4.75rem;
  }

  .snippet-showcase {
    -webkit-margin-before: 5rem;
    margin-block-start: 5rem;
    grid-template-columns: 1.2fr 1fr;
    gap: 6.75rem;
    max-width: 1212px;
  }

  .snippet-showcase figure {
    -webkit-margin-start: -4rem;
    margin-inline-start: -4rem;
    justify-self: end;
  }

  .feature-list {
    text-align: start;
    gap: 3.5rem;
  }

  .feature-list p {
    margin-inline: 0;
  }

  .access-anywhere {
    -webkit-padding-after: 4.5rem;
    padding-block-end: 4.5rem;
  }

  .access-anywhere figure {
    -webkit-margin-before: 6.75rem;
    margin-block-start: 6.75rem;
  }

  .supercharge h2 {
    -webkit-margin-after: 1rem;
    margin-block-end: 1rem;
  }

  .workflow-features {
    -webkit-margin-before: 4.5rem;
    margin-block-start: 4.5rem;
    gap: 2rem;
  }

  .workflow-features.container {
    max-width: 74rem;
  }

  .sponsor-logos {
    gap: 5rem;
  }

  footer {
    padding-block: 2.5rem;
  }

  .footer-content {
    -webkit-column-gap: 8.25rem;
    -moz-column-gap: 8.25rem;
    column-gap: 8.25rem;
  }

  .footer-links {
    -webkit-column-gap: 5.25rem;
    -moz-column-gap: 5.25rem;
    column-gap: 5.25rem;
    max-width: 40rem;
  }
}

@media (min-width: 1600px) {
  .snippet-showcase {
    max-width: 80%;
    margin-inline: auto;
  }
}