:root {
  --color-brand-primary: #3864d9; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale; }

body {
  background: #e6f4f1;
  margin: 0;
  font-family: "Open Sans", sans-serif;
  line-height: 1.5; }

p,
h1,
h2,
h3,
h4,
blockquote {
  margin: 0; }

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

ul {
  list-style: none;
  padding: 0;
  margin: 0; }

a {
  text-decoration: none;
  color: #000;
  display: inline-block; }

.visually-hidden {
  position: absolute;
  overflow: hidden;
  clip: rect(0 0 0 0);
  height: 1px;
  width: 1px;
  margin: -1px;
  padding: 0;
  border: 0; }

@font-face {
  font-family: 'booster-next-fy-regular';
  src: url("../fonts/booster-next-fy-regular.woff");
  font-weight: normal;
  font-style: normal; }

@font-face {
  font-family: 'booster-next-fy-medium';
  src: url("../fonts/booster-next-fy-medium.woff");
  font-weight: normal;
  font-style: normal; }

@font-face {
  font-family: 'booster-next-fy-bold';
  src: url("../fonts/booster-next-fy-bold.woff");
  font-weight: normal;
  font-style: normal; }

.o-wrapper {
  max-width: var(--width, 63rem);
  padding-left: 16px;
  padding-right: 16px;
  margin-left: auto;
  margin-right: auto; }

.button {
  min-width: 200px;
  -moz-appearance: none;
       appearance: none;
  -webkit-appearance: none;
  font-size: 16px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 10px;
  border-radius: 5px;
  color: #fff;
  background-color: #3864d9;
  border: 0;
  cursor: pointer;
  text-align: center;
  transition: 0.3s ease-out;
  border: 2px solid transparent; }
  .button:hover {
    background-color: #2246a7;
    box-shadow: 0 7px 15px 0 rgba(0, 0, 0, 0.2); }

.c-hero {
  padding: 2rem 0;
  background: url("../images/pattern.png") center/auto 200px repeat-x;
  text-align: center; }
  .c-hero .o-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    grid-gap: 1rem 2rem;
    align-items: center; }
    @media (min-width: 800px) {
      .c-hero .o-wrapper {
        grid-template-columns: 2fr 1fr; } }
  @media (min-width: 800px) {
    .c-hero {
      text-align: left;
      padding: 5rem 0; } }
.c-hero__title {
  font-family: paralucent, sans-serif;
  font-weight: 300;
  font-size: 26px;
  color: #3c5083;
  margin: 0 0 1rem; }
  .c-hero__title span {
    display: block;
    font-size: 40px;
    font-weight: 700;
    color: #4166d2; }
  @media (min-width: 800px) {
    .c-hero__title {
      font-size: 40px; }
      .c-hero__title span {
        font-size: 70px; } }
.c-hero__desc {
  color: #3c5083;
  font-size: calc(13px + 0.5vw);
  max-width: 630px;
  margin: auto auto 1rem; }
  .c-hero__desc.preview {
    margin-top: 1rem;
    font-size: 18px; }
    .c-hero__desc.preview a {
      font-weight: bold;
      box-shadow: inset 0 -5px 0 0 rgba(56, 100, 217, 0.25); }
  @media (min-width: 800px) {
    .c-hero__desc {
      margin: 0 0 1rem; } }
.c-hero__book {
  position: relative;
  width: 196px;
  height: 292px;
  margin: 0 auto;
  perspective: 350px;
  order: -1; }
  .c-hero__book:before {
    content: "";
    position: absolute;
    left: calc(100% - 5px);
    top: 0;
    bottom: 0;
    width: 30px;
    height: 100%;
    background: repeating-linear-gradient(to right, #fff, #d2d2d2 4px, #465298 4px);
    transform: rotateY(45deg); }
  .c-hero__book img {
    width: 100%;
    height: 100%;
    border-radius: 6px;
    box-shadow: 0 17px 25px 0 rgba(0, 0, 0, 0.25);
    transform: rotateY(-10deg); }
  @media (min-width: 800px) {
    .c-hero__book {
      order: inherit;
      text-align: right; }
      .c-hero__book img {
        max-width: 300px; } }
.c-section {
  padding: 2.5rem 0; }
  @media (min-width: 800px) {
    .c-section {
      padding: 5rem 0; } }
  .c-section.bg-primary {
    background-color: var(--color-brand-primary); }
  .c-section.bg-dark {
    background-color: #202d4e; }
  .c-section h2 {
    font-family: paralucent, sans-serif;
    font-weight: 700;
    text-align: center;
    margin-top: 0; }
  .c-section--simple {
    padding: 3rem 0; }

.c-section--features,
.c-section--buy {
  background-color: #202d4e; }

.c-section--buy .c-section__title {
  color: #fff; }

.intro-1 {
  max-width: 692px;
  margin: 0 auto 3rem;
  color: #202d4e;
  background-color: #fff;
  padding: 1rem;
  border-radius: 5px;
  font-size: 18px;
  text-align: center; }
  @media (min-width: 800px) {
    .intro-1 {
      margin: 0 auto 5rem;
      font-size: 20px; } }
.intro-2 {
  max-width: 692px;
  margin: 0 auto 3rem;
  color: #fff;
  font-size: 18px;
  text-align: center; }
  @media (min-width: 800px) {
    .intro-2 {
      margin: 0 auto 5rem;
      font-size: 20px; } }
.c-content {
  max-width: 840px;
  margin: 0 auto;
  background-color: #fff;
  border-radius: 9px;
  padding-top: 1rem;
  overflow: hidden; }

.c-section__title {
  color: var(--color-brand-primary);
  font-size: 24px;
  margin-bottom: 1rem; }
  @media (min-width: 800px) {
    .c-section__title {
      font-size: 40px; } }
  .c-section__title.light {
    color: #fff;
    margin-bottom: 3rem; }

.c-table {
  counter-reset: chapter; }

.c-table__item {
  position: relative;
  padding: 1rem 1rem 1rem 5rem; }
  .c-table__item:before {
    counter-increment: chapter;
    content: "Ch " counter(chapter);
    position: absolute;
    left: 1rem;
    top: 1rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #b0c4ff;
    font-size: 14px;
    text-align: center;
    line-height: 40px; }
  @media (min-width: 800px) {
    .c-table__item {
      padding: 2rem 2rem 2rem 8rem; }
      .c-table__item:before {
        left: 2rem;
        top: 2rem;
        width: 64px;
        height: 64px;
        line-height: 64px;
        font-size: 20px; } }
  .c-table__item h3 {
    margin: 0;
    font-size: 18px; }
  .c-table__item p {
    font-size: 16px; }
  .c-table__item:nth-child(odd) {
    background-color: #f0f8f7; }
  @media (min-width: 800px) {
    .c-table__item h3 {
      margin: 0 0 0.5rem;
      font-size: 22px; }
    .c-table__item p {
      font-size: 20px; } }
.c-features {
  display: grid;
  grid-template-columns: 1fr;
  grid-gap: 2rem 3rem; }
  @media (min-width: 800px) {
    .c-features {
      grid-template-columns: 1fr 1fr;
      grid-gap: 3rem; } }
.c-feature {
  display: grid;
  grid-template-columns: 30px 1fr;
  grid-gap: 1rem;
  color: #fff; }
  @media (min-width: 800px) {
    .c-feature {
      grid-template-columns: 40px 1fr;
      grid-gap: 2rem; } }
.c-feature__title,
.c-feature__desc {
  color: inherit; }

.c-feature__title {
  margin: 0 0 0.25rem;
  font-size: 18px; }
  @media (min-width: 800px) {
    .c-feature__title {
      font-size: 20px; } }
.c-feature__desc {
  font-size: 16px;
  opacity: 0.9; }
  @media (min-width: 800px) {
    .c-feature__desc {
      font-size: 18px; } }
.c-feature__icon {
  max-width: 100%;
  opacity: 0.6; }

/* Person */
.c-person {
  display: flex;
  align-items: center; }

.c-person__avatar {
  width: 65px;
  height: 65px;
  border-radius: 50%;
  border: 4px solid #fff;
  -webkit-margin-end: 10px;
          margin-inline-end: 10px;
  -o-object-fit: cover;
     object-fit: cover; }
  @media (min-width: 800px) {
    .c-person__avatar {
      width: 84px;
      height: 84px; } }
.c-praise {
  display: grid;
  grid-template-columns: 1fr;
  grid-gap: 2rem 3rem; }
  @media (min-width: 800px) {
    .c-praise {
      grid-template-columns: 1fr 1fr; } }
  .c-praise .c-person {
    position: relative;
    z-index: 1; }

.c-praise__item blockquote {
  position: relative;
  background-color: #fff;
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 9px 14px 0 rgba(0, 0, 0, 0.06); }
  .c-praise__item blockquote:before {
    content: "";
    position: absolute;
    left: 0;
    top: -40px;
    width: 40px;
    height: 50px;
    background-color: #fff; }

.c-praise__item.centered {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center; }
  .c-praise__item.centered blockquote {
    max-width: 550px;
    text-align: center;
    color: #fff;
    background-color: #384a77; }
    .c-praise__item.centered blockquote:before {
      display: none; }
    @media (min-width: 800px) {
      .c-praise__item.centered blockquote {
        font-size: 1.15rem;
        line-height: 1.6; } }
  .c-praise__item.centered .c-person {
    color: #fff;
    margin-bottom: 1rem; }
  .c-praise__item.centered .c-person__avatar {
    border-color: #384a77; }
  .c-praise__item.centered a {
    color: inherit; }
  .c-praise__item.centered .quote {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: -50px;
    width: 50px;
    height: 50px;
    opacity: 0.15;
    fill: #fff;
    display: none; }

.c-section--about {
  border-top: 5px solid #fff; }

.c-about {
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
  background-color: #fff;
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.05);
  border-radius: 9px;
  padding: 1rem; }

.c-about__content {
  display: grid;
  grid-template-columns: 1fr;
  grid-gap: 1rem; }
  @media (min-width: 800px) {
    .c-about__content {
      grid-template-columns: 1fr 250px; } }
.c-about__author {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 1rem; }

.c-about__image {
  order: -1;
  flex: 0 0 65px;
  width: 65px;
  height: 65px;
  border-radius: 50%;
  -o-object-fit: cover;
     object-fit: cover;
  margin-right: 0.75rem;
  box-shadow: 0 6px 15px 0 rgba(0, 0, 0, 0.2); }
  @media (min-width: 800px) {
    .c-about__image {
      width: 90px;
      height: 90px; } }
.c-about__title {
  font-size: 22px;
  color: #202d4e; }

.c-about__desc {
  font-size: 16px;
  color: #525252; }

.c-about__links {
  background-color: #dfedeb;
  padding: 1rem;
  border-radius: 4px; }
  .c-about__links p {
    font-weight: bold;
    margin-bottom: 0.5rem; }
  .c-about__links li:not(:last-child) {
    margin-bottom: 0.5rem; }
  .c-about__links a:before {
    content: "";
    background: url("../images/link.png") left center/16px no-repeat;
    display: inline-block;
    vertical-align: middle;
    width: 16px;
    height: 16px;
    margin-right: 8px; }

.buy {
  max-width: 380px;
  margin: 0 auto;
  background-color: #e1efec;
  padding: 1rem;
  border-radius: 5px;
  box-shadow: 0 9px 14px 0 rgba(0, 0, 0, 0.06);
  text-align: center; }
  .buy img {
    display: block;
    width: 100px;
    max-width: 100%;
    border-radius: 5px;
    box-shadow: 0 7px 20px 0 rgba(0, 0, 0, 0.25);
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 0.5rem; }

.buy__price {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  font-weight: bold; }
  .buy__price span {
    color: var(--color-brand-primary); }
  .buy__price s {
    font-size: 1.5rem;
    font-weight: normal; }

.buy__desc {
  margin-bottom: 1rem; }

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

.c-banner {
  padding: 0.85rem;
  text-align: center;
  color: #fff;
  background-color: #202d4e;
  font-weight: bold; }
  .c-banner a {
    color: #ede7a8;
    box-shadow: inset 0 -5px 0 0 rgba(237, 231, 168, 0.25); }

.buy-special {
  max-width: 500px;
  margin: 2rem auto 0;
  text-align: center; }
  .buy-special p {
    color: #fff; }