:root {
  --color-primary: #fdd83c;
  --color-secondary: #79ca8c;
  --color-tertiary: #ff585f;
  --color-primary-darker: #f0cd42;
  --color-secondary-darker: #ffbb00;
  --color-tertiary-darker: #fd424b;
  --color-primary-opacity: #fdf1c9;
  --color-secondary-opacity: #fdf1c9;
  --color-tertiary-opacity: #ff58602d;
  --gradient-primary: linear-gradient(to top left, #fdd83c, #d4b830);
  --gradient-secondary: linear-gradient(to top left, #ffb003, #ffcb03);
}

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

html {
  font-size: 62.5%;
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', sans-serif;
  font-weight: 300;
  color: #444;
  line-height: 1.9;
  background-color: #f3f3f3;
}

/* GENERAL ELEMENTS */
.section {
  padding: 15rem 3rem;
  border-top: 1px solid rgb(255, 255, 255, 0);
  transition: transform 1s, opacity 1s;
  -webkit-transition: transform 1s, opacity 1s;
  -moz-transition: transform 1s, opacity 1s;
  -ms-transition: transform 1s, opacity 1s;
  -o-transition: transform 1s, opacity 1s;
}

.section--hidden {
  opacity: 0;
  transform: translateY(8rem);
  -webkit-transform: translateY(8rem);
  -moz-transform: translateY(8rem);
  -ms-transform: translateY(8rem);
  -o-transform: translateY(8rem);
}

p {
  color: #666;
}

img {
  transition: filter 0.5s;
}

/* HEADER */

.header {
  padding: 0 3rem;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.nav {
  display: flex;
  justify-content: space-around;
  align-items: center;
  min-height: 8vh;
  background-color: var(--color-primary);
}

.nav__logo {
  height: 5.5rem;
  transition: all 0.3s;
}

.nav__links {
  display: flex;
  justify-content: space-around;
  width: 30%;
}

.nav__item {
  list-style: none;
}

.nav__link {
  color: #444;
  text-decoration: none;
  letter-spacing: 0.2rem;
  font-weight: bold;
  font-size: 1.5rem;
}

.burger {
  display: none;
  cursor: pointer;
}

.burger div {
  background-color: white;
  margin: 0.5rem;
  height: 0.3rem;
  width: 2.5rem;
  transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
}

.nav__link--btn:link,
.nav__link--btn:visited {
  padding: 0.8rem 2.5rem;
  border-radius: 3rem;
  background-color: #444;
  color: #fff;
  text-decoration: none;
  letter-spacing: 0.2rem;
  font-weight: bold;
  font-size: 1.5rem;
}

.nav__link--btn:hover,
.nav__link--btn:active {
  color: inherit;
  background-color: transparent;
  color: #fff;
}

.section__title {
  max-width: 80rem;
  margin: 0 auto 8rem auto;
}

.section__description {
  font-size: 1.8rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.section__header {
  font-size: 4rem;
  line-height: 1.3;
  font-weight: 500;
}

.btn {
  display: inline-block;
  background-color: var(--color-primary);
  font-size: 1.6rem;
  font-family: inherit;
  font-weight: 500;
  border: none;
  padding: 1.25rem 4.5rem;
  border-radius: 10rem;
  cursor: pointer;
  transition: all 0.3s;
}

.btn:hover {
  background-color: var(--color-primary-darker);
}

.btn--text {
  display: inline-block;
  background: none;
  font-size: 1.7rem;
  font-family: inherit;
  font-weight: 500;
  color: var(--color-primary);
  border: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  cursor: pointer;
  transition: all 0.3s;
}

.background__video {
  top: 0;

  width: 100%;
  overflow: hidden;
  position: absolute;
  z-index: -1;
  bottom: 0px;
  height: 110vh;
  transition: all ease-in-out 0.1s;
  -webkit-transition: all ease-in-out 0.1s;
  -moz-transition: all ease-in-out 0.1s;
  -ms-transition: all ease-in-out 0.1s;
  -o-transition: all ease-in-out 0.1s;
}

.background__video video {
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all ease-in-out 0.1s;
  -webkit-transition: all ease-in-out 0.1s;
  -moz-transition: all ease-in-out 0.1s;
  -ms-transition: all ease-in-out 0.1s;
  -o-transition: all ease-in-out 0.1s;
}

.header__title {
  flex: 1;

  margin-top: 5rem;
  max-width: 115rem;
  display: grid;
  grid-template-columns: 3fr 2fr;
  row-gap: 3rem;
  align-content: center;
  justify-content: center;

  align-items: start;
  justify-items: start;
}

.highlight {
  position: relative;
  z-index: -10;
}

.highlight::after {
  display: block;
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  height: 100%;
  width: 100%;
  z-index: -10;
  opacity: 0.7;
  transform: scale(1.07, 1.05) skewX(-15deg);
  background-image: var(--gradient-primary);
}

h1 {
  font-size: 5.5rem;
  line-height: 1.35;
}

h4 {
  font-size: 2.4rem;
  font-weight: 500;
}

.header__img {
  z-index: -10;
  width: 100%;
  grid-column: 2 / 3;
  grid-row: 1 / span 4;
  transform: translateY(-6rem);
  -webkit-transform: translateY(-6rem);
  -moz-transform: translateY(-6rem);
  -ms-transform: translateY(-6rem);
  -o-transform: translateY(-6rem);
}

/* FEATURES */
.features {
  display: grid;
  grid-template-columns: auto auto;

  gap: 8rem;
  margin: 0 12rem;
}

.features__computer-img {
  width: 100%;
}

.features__javacoin-img {
  width: 100%;
}

.features__card-img {
  width: 100%;
}

.features__feature {
  align-self: center;
  justify-self: center;
  width: 70%;
  font-size: 1.5rem;
}

.features__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-opacity);
  height: 5.5rem;
  width: 5.5rem;
  border-radius: 50%;
  margin-bottom: 2rem;
}

.features__icon svg {
  height: 2.5rem;
  width: 2.5rem;
  fill: var(--color-primary);
}

.features__header {
  font-size: 2rem;
  margin-bottom: 1rem;
}

/* OPERATIONS */
.operations {
  max-width: 100rem;
  margin: 12rem auto 0 auto;

  background-color: #fff;
}

.section-operations {
  margin-top: -10rem;
}

.operations__tab-container {
  display: flex;
  justify-content: center;
}

.operations__tab {
  margin-right: 2.5rem;
  transform: translateY(-50%);
  -webkit-transform: translateY(-50%);
  -moz-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  -o-transform: translateY(-50%);
}

.operations__tab span {
  margin-right: 1rem;
  font-weight: 600;
  display: inline-block;
}

.operations__tab--1 {
  background-color: var(--color-secondary);
}

.operations__tab--1:hover {
  background-color: #5ec576;
}

.operations__tab--3 {
  background-color: var(--color-tertiary);
  margin: 0;
}

.operations__tab--3:hover {
  background-color: var(--color-tertiary-darker);
}

.operations__tab--active {
  transform: translateY(-66%);
  -webkit-transform: translateY(-66%);
  -moz-transform: translateY(-66%);
  -ms-transform: translateY(-66%);
  -o-transform: translateY(-66%);
}

.operations__content {
  display: none;

  /* JUST PRESENTATIONAL */
  font-size: 1.7rem;
  padding: 2.5rem 7rem 6.5rem 7rem;
}

.operations__content--active {
  display: grid;
  grid-template-columns: 7rem 1fr;
  column-gap: 3rem;
  row-gap: 0.5rem;
}

.operations__header {
  font-size: 2.25rem;
  font-weight: 500;
  align-self: center;
}

.operations__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 7rem;
  width: 7rem;
  border-radius: 50%;
}

.operations__icon svg {
  height: 2.75rem;
  width: 2.75rem;
}

.operations__content p {
  grid-column: 2;
}

.operations__icon--1 {
  background-color: #bdf7cc;
}
.operations__icon--2 {
  background-color: var(--color-secondary-opacity);
}
.operations__icon--3 {
  background-color: var(--color-tertiary-opacity);
}
.operations__icon--1 svg {
  fill: #79ca8c;
}
.operations__icon--2 svg {
  fill: var(--color-secondary-darker);
}
.operations__icon--3 svg {
  fill: var(--color-tertiary);
}

/* Download APP */

.section__download--app {
  margin-top: -10rem;
}

.section__download--img {
  display: grid;

  margin: 0 12rem;
}

.app__store--img {
  width: auto;
  height: 70rem;
  transform: translateX(25%);
  -webkit-transform: translateX(25%);
  -moz-transform: translateX(25%);
  -ms-transform: translateX(25%);
  -o-transform: translateX(25%);
}

/* SIGN UP */
.section--sign-up {
  background-color: #37383d;
  border-top: none;
  border-bottom: 1px solid #444;
  text-align: center;
  padding: 10rem 3rem;
}

.section--sign-up .section__header {
  color: #fff;
  text-align: center;
}

.section--sign-up .section__title {
  margin-bottom: 6rem;
}

.section--sign-up .btn {
  font-size: 1.9rem;
  padding: 2rem 5rem;
}

/* FOOTER */
.footer {
  padding: 10rem 3rem;
  background-color: #37383d;
}

.footer__nav {
  list-style: none;
  display: flex;
  justify-content: center;
  margin-bottom: 5rem;
}

.footer__item {
  margin-right: 4rem;
}

.footer__link {
  font-size: 1.6rem;
  color: #eee;
  text-decoration: none;
}

.footer__logo {
  height: 15rem;
  display: block;
  margin: 0 auto;
  margin-bottom: 5rem;
}