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

:root {
  --font-fam: "Public Sans", sans-serif;
  --font-w-1: 300;
  --font-w-2: 400;
  --font-w-3: 700;
  --primary-1: hsl(233, 26%, 24%);
  --primary-2: hsl(136, 65%, 51%);
  --primary-3: hsl(192, 70%, 51%);
  --neutral-1: hsl(233, 8%, 62%);
  --neutral-2: hsl(220, 16%, 96%);
  --neutral-3: hsl(0, 0%, 98%);
  --neutral-4: hsl(0, 0%, 100%); }

html {
  font-size: 62.5%; }

body {
  font-size: 1.8rem;
  font-family: var(--font-fam);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-x: hidden; }

ul {
  list-style: none; }

a {
  text-decoration: none; }

button {
  border-style: none;
  border-radius: 4.8rem;
  padding: 1.4rem 2.4rem;
  font-size: 1.4rem;
  background: linear-gradient(to right, var(--primary-2), var(--primary-3));
  box-shadow: 0.2rem 0.2rem 0.4rem rgba(0, 0, 0, 0.459);
  color: var(--neutral-4);
  font-family: var(--font-fam);
  font-weight: var(--font-w-2);
  cursor: pointer; }
  button:hover {
    opacity: 0.5; }

header {
  background: var(--neutral-4);
  display: flex;
  justify-content: space-around;
  align-items: center;
  width: 100vw;
  height: 10vh;
  z-index: 100;
  box-shadow: 0.2rem 0.2rem 0.8rem rgba(0, 0, 0, 0.05); }

.main-nav {
  display: flex;
  justify-content: space-around;
  align-items: center; }

.section-first {
  padding: 16rem;
  background: var(--neutral-3);
  display: flex;
  justify-content: space-between; }

.section-second {
  padding: 16rem;
  width: 100%;
  gap: 3.6rem;
  background: var(--neutral-2); }

.section-third {
  padding: 4rem 16rem 12rem 16rem;
  background: var(--neutral-3); }

footer {
  background: var(--primary-1);
  color: var(--neutral-1);
  padding: 4rem 16rem 2rem 16rem;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(5, 1fr); }

.main-nav ul {
  display: flex;
  gap: 6rem; }
  .main-nav ul li a {
    color: var(--neutral-1); }
  .main-nav ul li a:hover {
    color: var(--primary-1);
    padding-bottom: 3.4rem;
    border-bottom: 0.4rem solid var(--primary-2); }

.section-first {
  background-image: url(../images/bg-intro-desktop.svg);
  background-repeat: no-repeat;
  width: 100%;
  height: 100%;
  background-size: 70%; }
  .section-first .img-front-contain {
    position: relative;
    width: 100%; }
    .section-first .img-front-contain #img-front {
      object-fit: contain;
      position: absolute; }

.first--txt {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2.8rem;
  width: 50%; }
  .first--txt h1 {
    width: 15ch;
    font-size: 6rem;
    font-weight: var(--font-w-1);
    color: var(--primary-1); }
  .first--txt p {
    width: 42ch;
    color: var(--neutral-1);
    line-height: 1.25; }

.second--txt h1 {
  color: var(--primary-1);
  font-size: 5rem;
  font-weight: var(--font-w-2); }

.second--txt p {
  padding-top: 1rem;
  padding-bottom: 4rem;
  width: 60ch;
  line-height: 1.5;
  color: var(--neutral-1); }

.second--cards {
  width: 100%;
  display: flex;
  justify-content: space-between;
  gap: 2.5rem; }
  .second--cards .second-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2.4rem; }
    .second--cards .second-card h3 {
      color: var(--primary-1);
      font-size: 3.2rem;
      font-weight: var(--font-w-2); }
    .second--cards .second-card p {
      width: 25ch;
      color: var(--neutral-1);
      line-height: 1.5; }
    .second--cards .second-card #logo {
      width: 8rem;
      aspect-ratio: 1; }

.section-third h1 {
  padding: 3.2rem 0;
  color: var(--primary-1);
  font-size: 4rem;
  font-weight: var(--font-w-2); }

.section-third .third--cards {
  display: flex;
  gap: 2.6rem; }

.third-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  border-radius: 1rem;
  overflow: hidden;
  background: #fff; }
  .third-card div {
    padding: 1.6rem; }
  .third-card img {
    width: 100%; }
  .third-card #t-caption {
    font-size: 1.2rem;
    color: var(--neutral-1); }
  .third-card .t-heading {
    padding: 1.2rem 0;
    color: var(--primary-1);
    width: 20ch; }
    .third-card .t-heading a {
      color: var(--primary-1);
      text-decoration: none; }
    .third-card .t-heading a:hover {
      color: var(--primary-2); }
  .third-card #t-para {
    width: 27ch;
    line-height: 1.25;
    font-size: 1.4rem;
    color: var(--neutral-1); }

footer .footer-icon {
  display: flex;
  flex-direction: column;
  gap: 2.5rem; }
  footer .footer-icon div {
    display: flex;
    align-items: center; }
    footer .footer-icon div #company-logo {
      width: 10rem;
      height: auto; }
    footer .footer-icon div p {
      margin-left: -76px;
      color: var(--neutral-4);
      font-size: 1.4rem;
      font-weight: 700; }

footer .footer-icons {
  display: flex;
  gap: 1rem; }
  footer .footer-icons #f-icon {
    width: 1.4rem; }
  footer .footer-icons #f-icon:hover {
    filter: invert(0.04) sepia(1) saturate(8.1) hue-rotate(64.8deg) brightness(1); }

footer div ul {
  list-style: none;
  font-size: 1rem; }

footer div li {
  padding: 0.5rem; }
  footer div li a {
    text-decoration: none;
    color: var(--neutral-1); }
  footer div li a:hover {
    color: var(--primary-2); }

footer .f-end {
  grid-column: 5 / 6;
  text-align: right; }
  footer .f-end p {
    padding: 2rem 0;
    font-size: 1rem;
    color: var(--neutral-1); }

.attribution {
  grid-column: 1 / -1;
  font-size: 1rem;
  color: var(--neutral-1);
  margin: 0 auto; }

.attribution a {
  color: var(--neutral-1); }

/* rem and em do NOT depend on html font-size in media queries! Instead, 1rem = 1em = 16px */
/**************************/
/* above 1660px // 1660/16 = 103.75rem */
/**************************/
@media (min-width: 103.75rem) {
  .section-first {
    background-position: 100rem -25.5rem; }
    .section-first .img-front-contain #img-front {
      height: 100rem;
      top: -100%;
      right: -30%; } }

/**************************/
/* below 1659px // 1660/16 = 103.75rem */
/**************************/
@media (max-width: 103.74rem) {
  .section-first {
    background-position: 80rem -21.5rem; }
    .section-first .img-front-contain #img-front {
      height: 100rem;
      top: -100%;
      right: -40.5%; } }

/**************************/
/* BELOW 1400px // 1400/16 = 87.5em */
/**************************/
@media (max-width: 87.5rem) {
  .section-first {
    background-position: 70rem -20rem; }
    .section-first .img-front-contain #img-front {
      top: -100%;
      right: -50%; } }

/**************************/
/* BELOW 1300px // 1300/16 = 81.25em */
/**************************/
@media (max-width: 81.25em) {
  .section-first {
    background-position: 100rem -20rem; }
    .section-first .img-front-contain #img-front {
      height: 95rem;
      right: -29.5%; }
  .section-first,
  .section-second {
    padding-left: 12rem; }
  .section-third {
    padding: 2rem 12rem 10rem 12rem; }
  footer {
    padding: 2rem 12rem 2rem 12rem; }
  .main-nav ul {
    gap: 4rem; }
    .main-nav ul li a:hover {
      padding-bottom: 2.6rem; }
  .first--txt {
    gap: 2.6rem; }
    .first--txt h1 {
      font-size: 5rem; }
  .second--txt h1 {
    font-size: 4rem; }
  .second--cards .second-card h3 {
    font-size: 2.8rem; }
  .second--cards .second-card p {
    font-size: 1.4rem; }
  .second--cards .second-card #logo {
    width: 6rem; }
  .section-third h1 {
    font-size: 3.2rem; } }

/**************************/
/* BELOW 1200px // 1200/16 = 75em */
/**************************/
@media (max-width: 75em) {
  .section-first {
    background-position: 170% 60%; }
    .section-first .img-front-contain #img-front {
      height: 95rem;
      right: -29.5%; }
  .section-first,
  .section-second {
    padding-left: 4rem;
    padding-right: 4rem; }
  .section-third {
    padding: 0.2rem 4rem 2rem 4rem; }
  footer {
    padding: 2rem 4rem 2rem 4rem; } }

@media (max-width: 68.75em) {
  .section-first {
    background-position: 170% 60%; }
    .section-first .img-front-contain #img-front {
      height: 90rem; }
  .first--txt {
    gap: 2.6rem; }
    .first--txt h1 {
      font-size: 4rem; }
    .first--txt p {
      width: 40ch; }
  .second--txt h1 {
    font-size: 3.2rem; }
  .second--cards .second-card h3 {
    font-size: 2rem; }
  .second--cards .second-card p {
    font-size: 1.2rem; }
  .second--cards .second-card #logo {
    width: 5rem; }
  .section-third h1 {
    font-size: 2.8rem; } }

@media (max-width: 56.25em) {
  .section-first {
    background-position: 170% 60%; }
    .section-first .img-front-contain #img-front {
      height: 80rem; }
  .section-first,
  .section-second {
    padding-left: 2rem; }
  .section-third {
    padding: 0.2rem 2rem 1rem 2rem; }
  footer {
    padding: 1rem 2rem 1rem 2rem; }
    footer .f-end {
      grid-template-columns: 4 / 6; }
    footer .footer-icons {
      gap: 1rem; }
      footer .footer-icons #f-icon {
        width: 1rem; }
    footer div ul {
      font-size: 1rem; }
    footer div li {
      padding: 0.25rem; }
  button {
    border-radius: 2.4rem;
    padding: 1rem 1.2rem;
    font-size: 1.2rem; }
  .main-nav ul {
    gap: 2rem; }
  .first--txt {
    gap: 2rem; }
    .first--txt h1 {
      font-size: 2.8rem; }
    .first--txt p {
      font-size: 1.4rem; }
  .second--txt h1 {
    font-size: 2rem; }
  .second--txt p {
    font-size: 1.4rem; }
  .second--cards {
    gap: 1.2rem; }
    .second--cards .second-card h3 {
      font-size: 1.6rem; }
    .second--cards .second-card p {
      font-size: 1.2rem;
      width: 18ch; }
    .second--cards .second-card #logo {
      width: 4rem; }
  .section-third h1 {
    font-size: 2rem;
    padding: 2rem 0; }
  .section-third .third--cards {
    gap: 1.6rem; }
  .third-card div {
    padding: 1rem; }
  .third-card .t-heading {
    padding: 0.8rem 0;
    width: 12ch; }
  .third-card #t-caption {
    font-size: 1.2rem; }
  .third-card #t-para {
    width: 16ch;
    font-size: 1.4rem; } }

/**************************/
/* BELOW 720px // 720/16 = 45rem */
/**************************/
@media (max-width: 45rem) {
  html {
    /* 9px / 16px  */
    font-size: 56.25%; }
  .section-first {
    background-position: 170% 60%; }
    .section-first .img-front-contain #img-front {
      height: 78rem;
      top: -25.5%;
      right: -26.5%; }
  .main-nav ul {
    gap: 1rem; }
  .first--txt p {
    width: 30ch; }
  footer .footer-icons {
    gap: 0.25rem; }
    footer .footer-icons #f-icon {
      width: 1rem; }
  footer div ul {
    font-size: 1rem; }
  footer div li {
    padding: 0.1rem; }
  .third-card div {
    padding: 0.5rem; }
  .third-card .t-heading {
    width: 12ch; } }

/**************************/
/* BELOW 500px // 500/16 = 31.25em */
/**************************/
@media (max-width: 31.25rem) {
  header {
    justify-content: flex-start; }
    header #easy-logo {
      padding-left: 3.2rem;
      height: 2.8rem; }
    header .main-nav {
      display: none; }
    header button {
      display: none; }
  .section-first {
    background-image: url(../images/bg-intro-mobile.svg);
    background-size: cover; }
    .section-first .img-front-contain {
      height: 78rem; }
  .first--txt {
    align-items: center; }
  .second--cards,
  .third--cards {
    flex-direction: column;
    align-items: center; }
  footer {
    display: flex;
    flex-direction: column;
    text-align: center; }
    footer .footer-icon {
      align-items: center; }
    footer .f-end {
      text-align: center; } }

/**************************/
/* BELOW 400px // 400/16 = 25em */
/**************************/