:root {
  --color-main: #af2130;
  --color-sub: #fff5f4;
  --color-text: #231815;
  --color-bg: #fffdfa;
  --color-white: #ffffff;
  --color-soft: #f7f2ef;
  --color-border: #bebebe;
  --color-muted: #685b56;
  /* Course theme colors */
  --course-a-main: #a73a45;
  --course-a-sub: #fff5f4;
  --course-a-accent: var(--course-a-main);
  --course-a-tab-main: var(--course-a-main);
  --course-a-tab-sub: #efc3bd;
  --course-a-on: #ffffff;
  --course-b-main: #aa7322;
  --course-b-sub: #fff8eb;
  --course-b-accent: var(--course-b-main);
  --course-b-tab-main: var(--course-b-main);
  --course-b-tab-sub: #fff8eb;
  --course-b-on: #ffffff;
  --course-c-main: #58627f;
  --course-c-sub: #f5f7fb;
  --course-c-accent: var(--course-c-main);
  --course-c-tab-main: var(--course-c-main);
  --course-c-tab-sub: #f2f3f5;
  --course-c-on: #ffffff;
  --course-d-main: #a36f6a;
  --course-d-sub: #c1aea5;
  --course-d-accent: var(--course-d-main);
  --course-d-tab-main: var(--course-d-main);
  --course-d-tab-sub: #dfd7d4;
  --course-d-on: #ffffff;
  --course-e-main: #f5d9d6;
  --course-e-bg: #fff5f4;
  --course-e-accent: #a73a45;
  --course-e-tab-main: #db7680;
  --course-e-tab-active: #efc3bd;
  --course-e-tab-sub: #a73a45;
  --course-e-on: #a73a45;
  --font-heading: "Shippori Mincho", serif;
  --font-body: "Noto Sans JP", sans-serif;
  --content-width: 1120px;
  --side-padding: 24px;
}

body {
  background: var(--color-white);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h1,
h2,
h3,
h4,
h5 {
  color: var(--color-text);
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

h1 {
  font-size: 48px;
}

h2 {
  font-size: 34px;
}

h3 {
  font-size: 30px;
}

h4 {
  font-size: 22px;
}

h5 {
  font-size: 19px;
}

p {
  line-height: 1.9;
  word-break: break-all;
}

address {
  font-style: normal;
}

.hero {
  position: relative;
  overflow: hidden;
  background: var(--color-main);
}

.hero picture,
.hero__image {
  width: 100%;
  height: 100%;
}

.hero__image {
  object-position: center center;
}

.hero__content {
  position: absolute;
  left: 50%;
  bottom: 72px;
  width: min(760px, calc(100% - 48px));
  transform: translateX(-50%);
  text-align: center;
  color: var(--color-white);
}

.hero__content h1,
.hero__content p {
  color: var(--color-white);
}

.hero__content h1 {
  margin-top: 14px;
}

.hero__content > p:last-child {
  margin-top: 20px;
  font-size: 18px;
  font-weight: 500;
}

.hero__content > p:last-child span {
  display: inline;
}

.hero__school {
  font-family: var(--font-heading);
  font-size: 20px;
}

.section {
  padding: 50px 0;
}

.section__inner {
  width: min(var(--content-width), calc(100% - var(--side-padding) * 2));
  margin-inline: auto;
}

.lead-section {
  background: var(--color-sub);
}

.lead {
  display: grid;
  gap: 22px;
  max-width: 820px;
  margin-inline: auto;
  text-align: justify;
  font-family: var(--font-body);
  font-size: 18px;
  font-weight:500;
}

.lead h2{
  text-align:center;
  color:var(--color-main);
}

.lead p{
  line-height:2.0;
}

.flyer-section {
  padding: 56px 0;
  background: var(--color-soft);
}

.flyer {
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  gap: 32px;
  text-align: center;
}

.flyer > div {
  text-align: center;
}

.section.courses-section {
  position: relative;
  overflow: hidden;
  --courses-bg-color: var(--course-a-main);
  --courses-pattern-image: url("../img/bg-pattern.png");
  --courses-pattern-opacity: .1;
  padding-top: 0;
  background-color: var(--courses-bg-color);
  transition: background-color .2s ease;
}

.courses-section[data-active-course="course-a"] {
  --courses-bg-color: var(--course-a-main);
}

.courses-section[data-active-course="course-b"] {
  --courses-bg-color: var(--course-b-main);
}

.courses-section[data-active-course="course-c"] {
  --courses-bg-color: var(--course-c-main);
}

.courses-section[data-active-course="course-d"] {
  --courses-bg-color: var(--course-d-main);
}

.courses-section[data-active-course="course-e"] {
  --courses-bg-color: var(--course-e-main);
  --courses-pattern-opacity: .36;
}

.courses-section::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: var(--courses-pattern-opacity);
  background-image: var(--courses-pattern-image);
  background-repeat: repeat;
  background-size: auto;
  transition: opacity .2s ease, background-image .2s ease;
}

.courses-section > .section__inner {
  position: relative;
  z-index: 1;
}

.course-picker {
  width: 100vw;
  padding: 40px max(var(--side-padding), calc((100vw - var(--content-width)) / 2)) 32px;
  margin-inline: calc(50% - 50vw);
  margin-bottom: 32px;
  background: var(--color-white);
}

.course-picker .section-heading {
  margin-bottom: 24px;
}

.course-picker .section-heading h2 {
  color: var(--color-text);
}

.course-picker .course-tabs {
  margin-bottom: 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 24px;
  border: 1px solid currentColor;
  border-radius: 4px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.button--primary {
  --button-hover-bg: var(--color-white);
  --button-hover-color: var(--color-main);
  --button-hover-border: var(--color-main);
  background: var(--color-main);
  color: var(--color-white);
  border-color: var(--color-main);
}

.button--outline {
  --button-hover-bg: var(--course-main, var(--color-main));
  --button-hover-color: var(--color-white);
  --button-hover-border: var(--course-main, var(--color-main));
  background: var(--color-white);
  color: var(--course-main, var(--color-main));
  border-color: var(--course-main, var(--color-main));
}

.button:hover,
.button:focus-visible {
  background: var(--button-hover-bg);
  color: var(--button-hover-color);
  border-color: var(--button-hover-border);
}

.text-link {
  display: inline-flex;
  width: fit-content;
  color: var(--color-main);
  font-weight: 700;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
}

.application-fixed-button {
  position: fixed;
  top: 50%;
  right: 0;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;

  /* 大きめ */
  min-width: 68px;
  min-height: 260px;
  padding: 26px 18px;

  /* 青 */
  background: #008CFF;
  border: 1px solid #008CFF;
  color: var(--color-white);

  /* 左側だけ角丸 */
  border-radius: 18px 0 0 18px;

  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  writing-mode: vertical-rl;
  transform: translateY(-50%);
  box-shadow: -5px 0 9px rgb(58 42 50 / 35%);
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}

.application-fixed-button:hover,
.application-fixed-button:focus-visible {
  background: #008CFF;
  color: var(--color-white);
  border-color: #008CFF;
}

.section-heading {
  margin-bottom: 32px;
  text-align: center;
}

.section-heading h2 {
  margin-bottom: 8px;
}

.section-copy {
  color: var(--color-muted);
  font-weight: 700;
  text-align: center;
}

.course-tabs {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 32px;
}

#tab-course-a {
  --course-main: var(--course-a-tab-main);
  --course-sub: var(--course-a-tab-sub);
  --course-on: var(--course-a-on);
}

#tab-course-b {
  --course-main: var(--course-b-tab-main);
  --course-sub: var(--course-b-tab-sub);
  --course-on: var(--course-b-on);
}

#tab-course-c {
  --course-main: var(--course-c-tab-main);
  --course-sub: var(--course-c-tab-sub);
  --course-on: var(--course-c-on);
}

#tab-course-d {
  --course-main: var(--course-d-tab-main);
  --course-sub: var(--course-d-tab-sub);
  --course-on: var(--course-d-on);
}

#tab-course-e {
  --course-main: var(--course-e-tab-main);
  --course-active: var(--course-e-tab-active);
  --course-sub: var(--course-e-tab-sub);
  --course-on: var(--course-e-on);
}

.course-tab {
  min-height: 112px;
  padding: 16px 14px;
  border: 1px solid var(--course-main);
  border-radius: 4px;
  background: var(--color-white);
  color: var(--course-main);
  text-align:center;
}

.course-tab span {
  display: block;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
}

.course-tab > span::first-letter {
  font-size: 38px;
  line-height: 0.9;
}

.course-tab small {
  display: block;
  margin-top: 8px;
  color: inherit;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.5;
}

.course-tab.is-active {
  background: var(--course-active, var(--course-main));
  color: var(--course-on, var(--color-white));
}

.course-panel {
  padding: 40px;
  border: 1px solid var(--course-main);
  background: var(--color-white);
}

#course-a {
  --course-main: var(--course-a-main);
  --course-sub: var(--course-a-sub);
  --course-accent: var(--course-a-accent);
  --course-on: var(--course-a-on);
}

#course-b {
  --course-main: var(--course-b-main);
  --course-sub: var(--course-b-sub);
  --course-accent: var(--course-b-accent);
  --course-on: var(--course-b-on);
}

#course-c {
  --course-main: var(--course-c-main);
  --course-sub: var(--course-c-sub);
  --course-accent: var(--course-c-accent);
  --course-on: var(--course-c-on);
}

#course-d {
  --course-main: var(--course-d-main);
  --course-sub: var(--course-d-sub);
  --course-accent: var(--course-d-accent);
  --course-on: var(--course-d-on);
}

#course-e {
  --course-main: var(--course-e-main);
  --course-sub: var(--course-e-bg);
  --course-accent: var(--course-e-accent);
  --course-on: var(--course-e-on);
}

.course-panel__header {
  padding-bottom: 28px;
  margin-bottom: 36px;
  border-bottom:1px solid var(--color-border);
  text-align: center;
}

.course-heading {
  display: grid;
  grid-template-columns: auto minmax(0, auto);
  align-items: center;
  justify-content: center;
  gap: 22px;
}

.course-heading__label {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 118px;
  height: 118px;
  background: var(--course-main, var(--color-main));
  border-radius: 50%;
  color: var(--course-on, var(--color-white));
  line-height: 1;
}

.course-heading__letter {
  font-size: 54px;
  font-weight: 700;
  line-height: 0.9;
}

.course-heading__unit {
  margin-top: 8px;
  margin-left: 0;
  font-size: 18px;
  font-weight: 700;
}

.course-heading__name {
  color: var(--color-text);
  font-size: 30px;
  text-align: left;
}

.course-heading__note {
  display: block;
  margin-top: 4px;
  font-size: 0.8em;
}

.course-kicker {
  display: inline-flex;
  padding: 4px 12px;
  margin-bottom: 14px;
  border: 1px solid var(--course-accent, var(--course-main));
  color: var(--course-accent, var(--course-main));
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
}

.course-layout {
  display: grid;
  grid-template-columns: 1fr;
}

.course-main {
  display: grid;
  gap: 50px;
}

.content-block {
  display: grid;
  gap: 16px;
}

.course-info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: start;
}

.content-block h4 {
  display: flex;
  align-items: center;
  justify-content:flex-start;
  gap: 12px;
}

.content-block h4::before {
  content: "";
  width: 5px;
  height: 100%;
  background: var(--course-accent, var(--course-main, var(--color-main)));
}

.overview-box {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 28px;
  align-items: stretch;
}

.overview-copy {
  display: grid;
  gap: 16px;
  align-self: center;
}

.book-card {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.book-card__body {
  display: grid;
  gap: 8px;
}

.book-card__body h5 {
  color: var(--course-accent, var(--course-main, var(--color-main)));
  border-bottom: 1px solid;
  padding-bottom: .25em;
}

.book-card__meta {
  display: grid;
  gap: 6px;
  font-size: 14px;
  line-height: 1.7;
}

.book-card__meta > span {
  display: block;
}

.book-card__title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
}

.book-card__label {
  display: inline-block;
  margin-right: .6em;
  color: var(--course-accent, var(--course-main, var(--color-main)));
  font-size: 12px;
  font-weight: 700;
}

.book-card img {
  width: 150px;
  aspect-ratio: 12 / 17;
  object-fit: cover;
}

.reference-block {
  display: grid;
  gap: 14px;
  align-content: center;
  padding: 24px;
  background: var(--course-sub);
}

.session-list {
  display: grid;
  gap: 14px;
}

.session-list--columns {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: stretch;
}

.session-list--columns .session {
  display: flex;
  flex-direction: column;
}

.session-list--columns .session h5 + p {
  margin-top: 10px;
}

.course-curriculum {
  display: grid;
  gap: 32px;
}

.curriculum-group {
  display: grid;
  gap: 16px;
}

.curriculum-group__title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 12px;
  color: var(--course-accent, var(--course-main, var(--color-main)));
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.45;
  text-align: center;
}

.format-icons {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
}

.format-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 26px;
  padding: 3px 8px;
  background: var(--course-accent, var(--course-main, var(--color-main)));
  color: var(--course-on, var(--color-white));
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.3;
}

.session {
  padding: 20px;
  background: var(--course-sub);
}

.session__count,
.session h5 {
  text-align: center;
}

.session__count {
  color: var(--course-accent, var(--course-main, var(--color-main)));
  font-size: 14px;
  font-weight: 700;
}

.session h5 {
  margin-top: 6px;
}

.session__date {
  margin-top: 6px;
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.7;
  text-align: center;
}

.session-teacher-media {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
}

.session-teacher-photo {
  display: block;
  width: 104px;
  text-decoration: none;
}

.session-teacher-photo img {
  width: 100%;
  aspect-ratio: 13 / 17;
  object-fit: cover;
  border: 1px solid var(--course-sub);
}

.session__teacher {
  margin-top: 10px;
  color: var(--color-muted);
  font-weight: 700;
}

.session__teacher strong,
.session__teacher small {
  display: block;
}

.session__teacher strong {
  margin-top: 4px;
  color: var(--color-text);
  font-size: 18px;
  line-height: 1.5;
}

.session__teacher small {
  margin-top: 2px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.6;
}

.session-list--columns .session-teacher-block,
.event-card .session-teacher-block {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.session-meta-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
  margin-top: 16px;
}

.session-role-group {
  display: grid;
  gap: 6px;
  justify-items: center;
  min-width: 0;
}

.session-venue-block {
  display: grid;
  gap: 6px;
  margin-top: 16px;
  text-align: center;
}

.session-meta-row .session-venue-block {
  margin-top: 0;
}

.session-list--columns .session-teacher-heading,
.event-card .session-teacher-heading,
.session-list--columns .session-venue-heading {
  color: var(--course-accent, var(--course-main, var(--color-main)));
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
}

.session-venue-text {
  color: var(--color-text);
  line-height: 1.7;
}

.session-teacher-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
}

.session h5 span {
    display: block;
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.7em;
    margin-top: 10px;
}

.session-teacher-card {
  display: grid;
  flex: 0 1 136px;
  gap: 4px;
  color: var(--color-text);
  text-align: center;
  text-decoration: none;
  transition: opacity .2s ease;
}

.session-teacher-card[href]:hover,
.session-teacher-card[href]:focus-visible {
  opacity: .5;
}

.session-teacher-card--text {
  align-self: center;
  min-height: 0;
  gap: 2px;
  padding: 0;
  align-content: center;
}

.session-teacher-card:only-child {
  flex-basis: auto;
  width: fit-content;
  max-width: 100%;
  justify-items: center;
}

.session-teacher-card--text.session-teacher-card:only-child {
  width: fit-content;
}

.session-teacher-card img {
  width: 100%;
  aspect-ratio: 13 / 17;
  object-fit: cover;
  border: 1px solid var(--course-sub);
}

.session-teacher-card:only-child img {
  width: 136px;
}

.session-teacher-card strong {
  color: var(--color-text);
  font-size: 17px;
  line-height: 1.45;
}

.session-teacher-card small {
  color: var(--color-muted);
  font-size: 12px;
  letter-spacing: 0;
  font-weight: 400;
  line-height: 1.55;
}

.session-teacher-card:only-child small {
  width: max-content;
  max-width: 100%;
  white-space: nowrap;
}

.session p:last-child:not(.session-venue-text) {
  margin-top: 8px;
}

.event-card {
  padding: 28px;
  background: var(--color-bg);
  text-align: center;
}

.event-card__label {
  color: var(--course-accent, var(--course-main, var(--color-main)));
  font-weight: 700;
}

.event-card h4 {
  margin-top: 8px;
}

.event-card dl {
  display: grid;
  gap: 10px;
  width: min(100%, 620px);
  margin: 22px auto 0;
  text-align: left;
}

.event-card dl > div {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.event-card dt {
  color: var(--course-accent, var(--course-main, var(--color-main)));
  font-weight: 700;
}

.event-card dd {
  margin: 0;
}

.back-to-tabs-wrap {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

.back-to-tabs {
  --button-hover-bg: var(--course-accent, var(--course-main, var(--color-main)));
  --button-hover-color: var(--color-white);
  --button-hover-border: var(--course-accent, var(--course-main, var(--color-main)));
  margin-top: 0;
  color: var(--course-accent, var(--course-main, var(--color-main)));
  border-color: var(--course-accent, var(--course-main, var(--color-main)));
}

.target-section {
  background: var(--color-sub);
}

.contact-section {
  background: var(--color-white);
}

.support-section {
  background: var(--color-sub);
}

.support-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: 820px;
}

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

.support-block h2 {
  margin-bottom: 14px;
  font-size: 27px;
}

.support-block p {
  line-height: 1.8;
}

.support-items {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
}

.support-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  height: 100%;
  min-height: 120px;
  padding: 18px;
  background: var(--color-white);
}

.support-item--logo img {
  width: 120px;
  flex: 0 0 auto;
}

.support-item--logo {
  flex-direction: column;
  gap: 8px;
}

.plain-block {
  padding-top: 28px;
  border-top: 2px solid var(--color-main);
  text-align: center;
}

.target-block {
  max-width: 820px;
  padding: 0;
  margin-inline: auto;
  border-top: 0;
  border-bottom: 0;
  background: transparent;
}

.plain-block h2 {
  margin-bottom: 16px;
  font-size: 27px;
}

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

.contact-block h2 {
  margin-bottom: 16px;
  font-size: 27px;
}

.contact-block .section-copy {
  margin-bottom: 12px;
  color: var(--color-text);
}

.contact-block address {
  display: grid;
  gap: 6px;
  justify-items: center;
  text-align: center;
}

.contact-block a {
  color: var(--color-main);
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px max(24px, calc((100vw - var(--content-width)) / 2 + var(--side-padding)));
  background: var(--color-text);
  color: var(--color-white);
}

.site-footer p {
  font-family: var(--font-heading);
  font-weight: 700;
}

.teacher-hero {
  padding: 72px 0 56px;
  background: var(--color-main);
  color: var(--color-white);
  text-align: center;
}

.teacher-hero h1 {
  color: var(--color-white);
  margin: 0;
  font-size: 46px;
}

.teacher-fixed-button {
  --teacher-fixed-button-offset: 0px;
  --fixed-button-footer-gap: 16px;
  position: fixed;
  right: clamp(18px, 3vw, 36px);
  bottom: clamp(18px, 3vw, 36px);
  z-index: 20;
  transform: translateY(calc(var(--teacher-fixed-button-offset) * -1));
  box-shadow: 0 10px 24px rgba(58, 42, 50, .18);
}

.teacher-fixed-button:hover,
.teacher-fixed-button:focus-visible {
  background: var(--color-white);
  color: var(--color-main);
  border-color: var(--color-main);
}

.teacher-section {
  background: var(--color-white);
}

.teacher-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.teacher-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
  padding: 28px;
  background: var(--color-sub);
}

.teacher-card figure {
  display: grid;
  gap: 8px;
  width: min(220px, 100%);
  margin-inline: auto;
}

.teacher-card img {
  width: 100%;
}

.teacher-card figcaption {
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.5;
}

.teacher-card h2 {
  margin: 8px 0 12px;
  font-size: 28px;
}

.course-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
}

.course-badge i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--badge-bg, var(--color-main));
  border-radius: 50%;
  color: var(--badge-color, var(--color-white));
  font-family: var(--font-heading);
  font-size: 18px;
  font-style: normal;
  line-height: 1;
}

.course-badge__icon--a {
  --badge-bg: var(--course-a-main);
  --badge-color: var(--course-a-on);
}

.course-badge__icon--b {
  --badge-bg: var(--course-b-main);
  --badge-color: var(--course-b-on);
}

.course-badge__icon--c {
  --badge-bg: var(--course-c-main);
  --badge-color: var(--course-c-on);
}

.course-badge__icon--d {
  --badge-bg: var(--course-d-main);
  --badge-color: var(--course-d-on);
}

.course-badge__icon--e {
  --badge-bg: var(--color-white);
  --badge-color: var(--course-e-on);
  border: 1px solid var(--badge-color);
}

@media (max-width: 980px) {
  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 29px;
  }

  h3 {
    font-size: 26px;
  }

  .course-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-heading__name {
    font-size: 26px;
  }

  .course-layout {
    grid-template-columns: 1fr;
  }

  .teacher-list {
    grid-template-columns: 1fr;
  }

}

@media (max-width: 767px) {
  :root {
    --side-padding: 18px;
  }

  body {
    font-size: 15px;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 25px;
  }

  h3 {
    font-size: 23px;
  }

  h4 {
    font-size: 20px;
  }

  .hero__content {
    left: 50%;
    bottom: 42px;
    width: calc(100% - var(--side-padding) * 2);
  }

  .hero__content > p:last-child {
    font-size: 16px;
  }

  .hero__content > p:last-child span {
    display: block;
  }

  .section {
    padding: 64px 0;
  }

  .lead {
    max-width: none;
    font-size: 16px;
  }

  .target-block {
    max-width: none;
  }

  .flyer {
    align-items: stretch;
    flex-direction: column;
  }

  .flyer .button {
    width: 100%;
  }

  .course-tabs {
    grid-template-columns: 1fr;
  }

  .course-tab {
    min-height: 86px;
  }

  .course-tab > span::first-letter {
    font-size: 34px;
  }

  .course-panel {
    padding: 24px 18px;
  }

  .course-heading {
    gap: 16px;
  }

  .course-heading__label {
    width: 96px;
    height: 96px;
  }

  .course-heading__letter {
    font-size: 42px;
  }

  .course-heading__unit {
    margin-top: 6px;
    font-size: 16px;
  }

  .course-heading__name {
    font-size: 23px;
  }

  .course-info-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .overview-box {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .reference-block {
    padding: 20px;
  }

  .book-card {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .book-card img {
    width: 160px;
  }

  .session-list--columns {
    grid-template-columns: 1fr;
  }

  .session-list--columns .session {
    display: flex;
  }

  .session-meta-row {
    grid-template-columns: 1fr;
  }

  .session-teacher-card {
    flex-basis: 122px;
  }

  .session-teacher-card:only-child img {
    width: 122px;
  }

  .session-teacher-card:only-child small {
    width: 100%;
    white-space: normal;
  }

  .event-card dl > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .support-list {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .support-items {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .has-application-button .site-footer {
    padding-bottom: calc(82px + env(safe-area-inset-bottom));
  }

  .teacher-hero {
    padding: 48px 0 44px;
  }

  .teacher-hero h1 {
    font-size: 34px;
  }

  .teacher-fixed-button {
    right: 16px;
    bottom: 16px;
    padding: 11px 18px;
    font-size: 14px;
  }

  .application-fixed-button {
    background: #008CFF;
    color: var(--color-white);
    border-color: #008CFF;
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    min-width: 0;
    min-height: 64px;
    padding: 16px 18px calc(16px + env(safe-area-inset-bottom));
    border-right: 0;
    border-bottom: 0;
    border-left: 0;

    /* スマホは上側だけ角丸 */
    border-radius: 18px 18px 0 0;

    font-size: 17px;
    writing-mode: horizontal-tb;
    transform: none;
    box-shadow: 0 -5px 9px rgb(58 42 50 / 35%);
  }

  .application-fixed-button:hover,
  .application-fixed-button:focus-visible {
    background: #008CFF;
    color: var(--color-white);
    border-color: #008CFF;
  }

  .teacher-card {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  .teacher-card figure {
    width: min(260px, 100%);
  }
}