@charset "UTF-8";

/* Base */
:root {
  --color-page: #transparent;
  --color-text: #000;
  --color-covered-call: #00997c;
  --color-theme: #43af40;
  --color-theme-text: #069502;
  --content-width: 1100px;
  --shadow-box: 0 0 10px rgba(0, 0, 0, 0.15);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 16px;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--color-page);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  line-height: 1.7;
}

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

picture {
  display: block;
}

.innerlink {
  height: 0px;
  position: absolute;
  top: -48px;
}

@media (min-width: 940px) {
  .innerlink {
    top: -108px;
  }
}

.common-inner {
  width: min(100% - 32px, var(--content-width));
  margin-inline: auto;
}

@media (min-width: 940px) {
  .common-inner {
    width: min(100% - 64px, var(--content-width));
  }
}

/* Common shadow box */
.common-shadow-box {
  padding: 20px 16px;
  background: #fff;
  box-shadow: var(--shadow-box);
  border-radius: 15px;
}

.common-shadow-box > :first-child {
  margin-top: 0;
}

.common-shadow-box > :last-child {
  margin-bottom: 0;
}

@media (min-width: 940px) {
  .common-shadow-box {
    padding: 32px 40px;
  }
}

/* Page header */
.page-header {
  width: 100%;
}

.page-header-img {
  width: 100%;
}

@media (min-width: 940px) {
  .page-header-img {
    min-height: 260px;
    object-fit: cover;
    object-position: center;
  }
}

/* Intro section */
.intro-section {
  padding: 32px 0 24px;
}

.intro-banner-img {
  width: 100%;
  margin-inline: auto;
}

.intro-heading {
  margin: 24px 0 0;
  color: #009b6f;
  font-size: clamp(22px, 5.5vw, 36px);
  line-height: 1.5;
  text-align: center;
}

.intro-heading-number {
  font-size: 1.45em;
  line-height: 1;
}

.intro-navigation {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  max-width: 600px;
  margin: 16px auto 0;
  width: 85%;
}

.intro-navigation-link {
  display: block;
  transition: opacity 0.2s ease;
}

.intro-navigation-link:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 3px;
}

@media (min-width: 940px) {
  .intro-section {
    padding: 100px 0;
  }

  .intro-banner-img {
    max-width: 900px;
  }

  .intro-heading {
    margin-top: 100px;
    font-size: 36px;
  }

  .intro-navigation {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    max-width: 900px;
    margin-top: 24px;
  }

  .intro-navigation-link:hover {
    opacity: 0.8;
  }
}

/* Section title */
.section-title {
  width: 100%;
  margin: 0;
  padding: 7px 16px;
  color: #fff;
  font-size: clamp(20px, 5vw, 32px);
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
}

@media (min-width: 940px) {
  .section-title {
    padding: 12px 32px;
    font-size: 36px;
  }
}

/* Covered call section */
.covered-call-section {
  padding-bottom: 40px;
  position: relative;
}

.covered-call-section .section-title {
  background: var(--color-covered-call);
}

.covered-call-content {
  width: min(100%, 672px);
  margin: 24px auto 0;
}

.covered-call-heading,
.covered-call-subheading {
  margin: 0 0 16px;
  line-height: 1.5;
  text-align: center;
}

.covered-call-heading {
  color: #000;
  font-size: 19px;
}

.covered-call-subheading {
  color: var(--color-covered-call);
  font-size: 18px;
}

.covered-call-text {
  margin: 12px 0;
  color: #000;
  font-size: 14px;
}

.covered-call-img {
  width: 100%;
  margin-top: 16px;
}

.covered-call-note {
  margin: 12px 0 0;
  color: #000;
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}

.covered-call-subheading-block {
  margin-top: 32px;
}

.covered-call-note + .covered-call-subheading {
  margin-top: 32px;
}

@media (min-width: 940px) {
  .covered-call-section {
    padding-bottom: 160px;
  }

  .covered-call-content {
    width: min(100%, 900px);
    margin-top: 60px;
  }

  .covered-call-heading {
    font-size: 36px;
  }

  .covered-call-subheading {
    font-size: 27px;
  }

  .covered-call-text {
    margin-block: 16px;
    font-size: 16px;
  }

  .covered-call-img {
    margin-top: 24px;
  }

  .covered-call-img-chpyauto {
    margin-left: auto;
    margin-right: auto;
    max-width: 80%;
  }

  .covered-call-note {
    margin-top: 16px;
    font-size: 13px;
  }

  .covered-call-subheading-block {
    margin-top: 40px;
  }

  .covered-call-note + .covered-call-subheading {
    margin-top: 40px;
  }
}

/* Theme section */
.theme-section {
  padding-bottom: 40px;
  position: relative;
}

.theme-section .section-title {
  background: var(--color-theme);
}

.theme-content {
  width: min(100%, 672px);
  margin: 24px auto 0;
}

.theme-heading,
.theme-subheading {
  margin: 0 0 16px;
  line-height: 1.5;
  text-align: center;
}

.theme-heading {
  color: #000;
  font-size: 19px;
}

.theme-subheading {
  color: var(--color-theme-text);
  font-size: 18px;
}

.theme-subheading-block {
  margin-top: 32px;
}

.theme-text {
  margin: 12px 0;
  color: #000;
  font-size: 14px;
}

.theme-img {
  width: 100%;
  margin-top: 16px;
}

.theme-note {
  margin: 12px 0 0;
  color: #000;
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}

@media (min-width: 940px) {
  .theme-section {
    padding-bottom: 160px;
  }

  .theme-content {
    width: min(100%, 900px);
    margin-top: 60px;
  }

  .theme-heading {
    font-size: 36px;
  }

  .theme-subheading {
    font-size: 27px;
  }

  .theme-text {
    margin-block: 16px;
    font-size: 16px;
  }

  .theme-img {
    margin-top: 24px;
  }

  .theme-subheading-block {
    margin-top: 40px;
  }

  .theme-note {
    margin-top: 16px;
    font-size: 13px;
  }
}

/* Leverage section */
.leverage-section {
  padding-bottom: 40px;
  position: relative;
}

.leverage-section .section-title {
  background: var(--color-covered-call);
}

.leverage-content {
  width: min(100%, 672px);
  margin: 24px auto 0;
}

.leverage-heading,
.leverage-subheading {
  margin: 0 0 16px;
  line-height: 1.5;
  text-align: center;
}

.leverage-heading {
  color: #000;
  font-size: 19px;
}

.leverage-subheading {
  color: var(--color-covered-call);
  font-size: 18px;
}

.leverage-subheading-block {
  margin-top: 32px;
}

.leverage-text {
  margin: 12px 0;
  color: #000;
  font-size: 14px;
}

.leverage-img {
  width: 100%;
  margin-top: 16px;
}

.leverage-note {
  margin: 12px 0 0;
  color: #000;
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}

@media (min-width: 940px) {
  .leverage-section {
    padding-bottom: 160px;
  }

  .leverage-content {
    width: min(100%, 900px);
    margin-top: 60px;
  }

  .leverage-heading {
    font-size: 36px;
  }

  .leverage-subheading {
    font-size: 27px;
  }

  .leverage-text {
    margin-block: 16px;
    font-size: 16px;
  }

  .leverage-img {
    margin-top: 24px;
  }

  .leverage-subheading-block {
    margin-top: 40px;
  }

  .leverage-note {
    margin-top: 16px;
    font-size: 13px;
  }
}

/* Stock index section */
.stock-index-section {
  padding-bottom: 40px;
  position: relative;
}

.stock-index-section .section-title {
  background: var(--color-theme);
}

.stock-index-content {
  width: min(100%, 672px);
  margin: 24px auto 0;
}

.stock-index-heading {
  margin: 0 0 16px;
  color: #000;
  font-size: 18px;
  line-height: 1.5;
  text-align: center;
}

.stock-index-img {
  width: 100%;
  margin-top: 16px;
}

.stock-index-text {
  margin: 16px 0 0;
  color: #000;
  font-size: 14px;
}

@media (min-width: 940px) {
  .stock-index-section {
    padding-bottom: 160px;
  }

  .stock-index-content {
    width: min(100%, 900px);
    margin-top: 60px;
  }

  .stock-index-content picture,
  .stock-index-text {
    margin-left: auto;
    margin-right: auto;
    width: 85%;
  }

  .stock-index-heading {
    font-size: 36px;
  }

  .stock-index-img {
    margin-top: 24px;
  }

  .stock-index-text {
    margin-top: 24px;
    font-size: 16px;
  }
}

/* How to start section */
.how-to-start-section {
  padding-bottom: 40px;
}

.how-to-start-section .section-title {
  background: var(--color-covered-call);
}

.how-to-start-img {
  width: 100%;
  max-width: 900px;
  margin: 24px auto 0;
}

@media (min-width: 940px) {
  .how-to-start-section {
    padding-bottom: 64px;
  }

  .how-to-start-img {
    margin-top: 60px;
  }
}