.study-hub {
  --hub-blue: #2f6f8f;
  --hub-paper: #fbfaf6;
}

.study-hub .study-hero__inner {
  min-height: min(640px, calc(100vh - 68px));
}

.study-hub-nav {
  position: sticky;
  z-index: 18;
  top: 68px;
  border-bottom: 1px solid rgba(13, 36, 68, .12);
  background: rgba(255, 253, 248, .94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.study-hub-nav > div {
  display: grid;
  width: var(--study-container);
  min-height: 66px;
  margin-inline: auto;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.study-hub-nav a {
  display: flex;
  padding: 12px 20px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border-right: 1px solid rgba(13, 36, 68, .1);
  color: var(--study-navy);
  font-size: 11px;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
}

.study-hub-nav a:first-child {
  border-left: 1px solid rgba(13, 36, 68, .1);
}

.study-hub-nav a:hover {
  color: var(--study-red);
  background: #fff;
}

.study-hub-nav span {
  color: var(--study-red);
  font: 800 9px/1 'Syne', sans-serif;
}

.study-hub .path-section {
  padding: clamp(82px, 10vw, 132px) 0;
  background:
    radial-gradient(circle at 94% 4%, rgba(211, 161, 94, .12), transparent 24%),
    var(--hub-paper);
}

.study-hub .path-card {
  overflow: hidden;
  border-color: rgba(13, 36, 68, .12);
  background: rgba(255, 255, 255, .86);
}

.study-hub .path-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: var(--path-color);
  content: "";
}

.study-hub .path-card:hover {
  border-color: color-mix(in srgb, var(--path-color) 34%, transparent);
}

.course-resources {
  padding: clamp(64px, 7vw, 88px) 0;
  background:
    radial-gradient(circle at 94% 2%, rgba(211, 161, 94, .11), transparent 22%),
    var(--hub-paper);
}

.course-resources__heading {
  display: grid;
  margin-bottom: clamp(34px, 5vw, 48px);
  grid-template-columns: minmax(0, 1fr) minmax(290px, 430px);
  align-items: end;
  gap: 52px;
}

.course-resources__heading h2 {
  margin: 0;
  color: var(--study-navy);
  font-family: var(--study-serif);
  font-size: clamp(32px, 4.8vw, 52px);
  letter-spacing: -.045em;
  line-height: 1.45;
}

.course-resources__heading > p {
  margin: 0 0 4px;
  color: var(--study-muted);
  font-size: 12px;
  line-height: 2;
}

.course-resource-list {
  display: grid;
  gap: 18px;
}

.course-resource-shelf {
  --course-accent: var(--study-english);
  --course-soft: #e8f2f0;
  display: grid;
  overflow: hidden;
  grid-template-columns: minmax(245px, .55fr) minmax(0, 1.45fr);
  border: 1px solid rgba(13, 36, 68, .12);
  border-radius: 4px 28px 4px 28px;
  background: #fff;
  box-shadow: 0 20px 55px rgba(7, 24, 44, .06);
  scroll-margin-top: 150px;
}

.course-resource-shelf--japanese {
  --course-accent: var(--study-japanese);
  --course-soft: #f5ebe7;
}

.course-resource-shelf--kosen {
  --course-accent: var(--study-kosen);
  --course-soft: #f3edde;
}

.course-resource-shelf__intro {
  position: relative;
  display: flex;
  min-width: 0;
  padding: clamp(28px, 3.5vw, 38px);
  overflow: hidden;
  flex-direction: column;
  align-items: flex-start;
  background:
    radial-gradient(circle at 90% 9%, color-mix(in srgb, var(--course-accent) 17%, transparent), transparent 30%),
    var(--course-soft);
}

.course-resource-shelf__intro::after {
  position: absolute;
  right: -58px;
  bottom: -92px;
  width: 190px;
  height: 190px;
  border: 1px solid color-mix(in srgb, var(--course-accent) 16%, transparent);
  border-radius: 50%;
  box-shadow: 0 0 0 28px color-mix(in srgb, var(--course-accent) 5%, transparent);
  content: "";
}

.course-resource-shelf__code {
  display: grid;
  width: 48px;
  height: 48px;
  margin-bottom: 25px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--course-accent);
  font: 800 11px/1 'Syne', sans-serif;
}

.course-resource-shelf__intro > p:first-of-type {
  margin: 0;
  color: var(--course-accent);
  font: 800 9px/1.2 'Syne', sans-serif;
  letter-spacing: .16em;
}

.course-resource-shelf__intro h3 {
  position: relative;
  z-index: 1;
  margin: 10px 0 13px;
  color: var(--study-navy);
  font-family: var(--study-serif);
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.45;
}

.course-resource-shelf__intro > p:last-of-type {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--study-muted);
  font-size: 11px;
  line-height: 1.9;
}

.course-resource-shelf__intro > a {
  position: relative;
  z-index: 1;
  display: inline-flex;
  min-height: 44px;
  margin-top: auto;
  padding: 10px 14px;
  align-items: center;
  gap: 12px;
  border: 1px solid color-mix(in srgb, var(--course-accent) 25%, transparent);
  border-radius: 999px;
  color: var(--course-accent);
  background: color-mix(in srgb, #fff 72%, transparent);
  font-size: 11px;
  font-weight: 800;
  text-decoration: none;
}

.course-resource-shelf__resources {
  min-width: 0;
  padding: clamp(26px, 3.5vw, 36px);
}

.course-resource-shelf__topline {
  display: flex;
  margin-bottom: 22px;
  padding-bottom: 16px;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--study-line);
}

.course-resource-shelf__topline span {
  color: var(--course-accent);
  font: 800 8px/1.2 'Syne', sans-serif;
  letter-spacing: .14em;
}

.course-resource-shelf__topline h4 {
  margin: 5px 0 0;
  color: var(--study-navy);
  font-family: var(--study-serif);
  font-size: 18px;
}

.course-resource-shelf__topline > p {
  margin: 0 0 2px;
  color: var(--study-muted);
  font-size: 9px;
  text-align: right;
}

.course-resource-feed {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.course-resource-feed .feed-status {
  grid-column: 1 / -1;
  margin: 0;
  padding: 28px;
  border: 1px dashed color-mix(in srgb, var(--course-accent) 28%, transparent);
  border-radius: 4px 18px 4px 18px;
  color: var(--study-muted);
  background: color-mix(in srgb, var(--course-soft) 50%, white);
  font-size: 11px;
}

.course-resource-card {
  position: relative;
  min-height: 210px;
  padding: 21px;
  border-color: rgba(13, 36, 68, .11);
  border-radius: 3px 18px 3px 18px;
  color: var(--study-navy);
  background: #fff;
  box-shadow: 0 10px 28px rgba(7, 24, 44, .045);
}

.course-resource-card::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--course-accent);
  content: "";
}

.course-resource-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--course-accent) 34%, transparent);
  box-shadow: 0 18px 38px rgba(7, 24, 44, .09);
}

.course-resource-card .managed-card__meta {
  margin-bottom: 17px;
}

.course-resource-card .managed-card__type {
  color: var(--course-accent);
}

.course-resource-card h3 {
  color: var(--study-navy);
  font-size: 17px;
  line-height: 1.55;
}

.course-resource-card > p {
  display: -webkit-box;
  overflow: hidden;
  color: var(--study-muted);
  font-size: 10px;
  line-height: 1.8;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.course-resource-card__details {
  display: flex;
  margin-top: 16px;
  flex-wrap: wrap;
  gap: 5px;
}

.course-resource-card__details span {
  display: inline-flex;
  max-width: 100%;
  padding: 4px 7px;
  overflow: hidden;
  border: 1px solid var(--study-line);
  border-radius: 999px;
  color: var(--study-muted);
  background: var(--course-soft);
  font-size: 8px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-resource-card .managed-card__cta {
  border-color: color-mix(in srgb, var(--course-accent) 20%, transparent);
  color: #fff;
  background: var(--course-accent);
}

.course-resource-feed .managed-feed__more {
  border-color: color-mix(in srgb, var(--course-accent) 26%, transparent);
  color: var(--course-accent);
  background: var(--course-soft);
}

.course-resource-feed .managed-feed__updated {
  color: var(--study-muted);
}

.teacher-resources {
  position: relative;
  padding: clamp(68px, 8vw, 96px) 0;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 7% 11%, rgba(211, 161, 94, .17), transparent 24%),
    radial-gradient(circle at 94% 84%, rgba(47, 111, 143, .22), transparent 28%),
    var(--study-navy-deep);
}

.teacher-resources::before {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, .025) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, .025) 1px, transparent 1px);
  background-size: 54px 54px;
  content: "";
  pointer-events: none;
}

.teacher-resources .study-container {
  position: relative;
  z-index: 1;
}

.teacher-resources__layout {
  display: grid;
  grid-template-columns: minmax(250px, .58fr) minmax(0, 1.42fr);
  gap: clamp(46px, 7vw, 82px);
  align-items: start;
}

.teacher-resources__intro {
  position: sticky;
  top: 166px;
}

.teacher-resources__intro .study-eyebrow {
  color: #e7c38c;
}

.teacher-resources__intro h2 {
  margin: 0;
  color: #fff;
  font-family: var(--study-serif);
  font-size: clamp(31px, 4.6vw, 50px);
  letter-spacing: -.045em;
  line-height: 1.5;
}

.teacher-resources__intro > p:last-of-type {
  margin: 24px 0 0;
  color: rgba(255, 255, 255, .65);
  font-size: 12px;
  line-height: 2;
}

.teacher-resources__guide {
  margin-top: 35px;
  padding: 24px 0 0;
  border-top: 1px solid rgba(255, 255, 255, .13);
}

.teacher-resources__guide > span,
.teacher-resources__topline > span {
  color: #e7c38c;
  font: 800 9px/1.2 'Syne', sans-serif;
  letter-spacing: .15em;
}

.teacher-resources__guide ol {
  display: grid;
  margin: 16px 0 0;
  padding: 0;
  gap: 9px;
  counter-reset: teacher-steps;
  list-style: none;
}

.teacher-resources__guide li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, .72);
  font-size: 10px;
  counter-increment: teacher-steps;
}

.teacher-resources__guide li::before {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 50%;
  color: #e7c38c;
  content: counter(teacher-steps);
  font-size: 8px;
}

.teacher-resources__content {
  min-width: 0;
}

.teacher-resources__topline {
  display: flex;
  margin-bottom: 24px;
  padding-bottom: 16px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, .13);
}

.teacher-resources__topline p {
  margin: 0;
  color: rgba(255, 255, 255, .45);
  font-size: 9px;
}

.teacher-resource-feed {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px;
}

.teacher-resource-feed .feed-status {
  min-height: 180px;
  padding: 30px;
  border: 1px dashed rgba(255, 255, 255, .22);
  border-radius: 4px 20px 4px 20px;
  color: rgba(255, 255, 255, .58);
  background: rgba(255, 255, 255, .04);
  font-size: 11px;
  line-height: 1.9;
}

.teacher-resource-card {
  min-height: 235px;
  padding: 23px;
  border-color: rgba(255, 255, 255, .13);
  color: #fff;
  background: rgba(255, 255, 255, .07);
  box-shadow: none;
  backdrop-filter: blur(10px);
}

.teacher-resource-card:hover {
  border-color: rgba(231, 195, 140, .5);
  background: rgba(255, 255, 255, .1);
  box-shadow: 0 20px 48px rgba(0, 0, 0, .18);
}

.teacher-resource-card .managed-card__meta {
  margin-bottom: 20px;
}

.teacher-resource-card .managed-card__type {
  color: #e7c38c;
}

.teacher-resource-card time {
  color: rgba(255, 255, 255, .42);
}

.teacher-resource-card h3 {
  color: #fff;
  font-size: 19px;
}

.teacher-resource-card > p {
  display: -webkit-box;
  overflow: hidden;
  color: rgba(255, 255, 255, .62);
  font-size: 10px;
  line-height: 1.85;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.teacher-resource-card__details {
  display: flex;
  margin-top: 20px;
  flex-wrap: wrap;
  gap: 6px;
}

.teacher-resource-card__details span {
  display: inline-flex;
  max-width: 100%;
  padding: 4px 8px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 999px;
  color: rgba(255, 255, 255, .54);
  font-size: 8px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.teacher-resource-card .managed-card__cta {
  border-color: rgba(231, 195, 140, .32);
  color: #102740;
  background: #e7c38c;
}

.teacher-resource-feed .managed-feed__updated {
  color: rgba(255, 255, 255, .4);
}

.managed-feed__more {
  min-height: 50px;
  grid-column: 1 / -1;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 999px;
  cursor: pointer;
  color: #fff;
  background: rgba(255, 255, 255, .06);
  font: 700 10px/1.2 var(--study-sans);
}

.managed-feed__more:hover {
  border-color: rgba(231, 195, 140, .55);
  background: rgba(255, 255, 255, .1);
}

.study-options {
  padding: clamp(66px, 7vw, 90px) 0;
  background: #edeae2;
}

.study-section-heading--compact {
  margin-bottom: 36px;
}

.study-option-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.study-option-grid details {
  overflow: hidden;
  border: 1px solid var(--study-line);
  border-radius: 4px 22px 4px 22px;
  background: var(--study-paper);
}

.study-option-grid summary {
  display: grid;
  min-height: 150px;
  padding: clamp(25px, 3.8vw, 38px);
  align-items: center;
  grid-template-columns: 48px minmax(0, 1fr) 30px;
  gap: 20px;
  cursor: pointer;
  list-style: none;
}

.study-option-grid summary::-webkit-details-marker {
  display: none;
}

.study-option-grid summary > span {
  color: rgba(13, 36, 68, .2);
  font: 800 30px/1 'Syne', sans-serif;
}

.study-option-grid summary small {
  color: var(--study-red);
  font: 800 8px/1.2 'Syne', sans-serif;
  letter-spacing: .14em;
}

.study-option-grid summary h3 {
  margin: 8px 0 6px;
  color: var(--study-navy);
  font-family: var(--study-serif);
  font-size: clamp(19px, 2.3vw, 25px);
}

.study-option-grid summary p {
  margin: 0;
  color: var(--study-muted);
  font-size: 10px;
}

.study-option-grid summary > b {
  color: var(--study-red);
  font-size: 22px;
  font-weight: 400;
  transition: transform .18s ease;
}

.study-option-grid details[open] summary > b {
  transform: rotate(45deg);
}

.study-option-body {
  padding: 0 clamp(25px, 3.8vw, 38px) clamp(25px, 3.8vw, 38px);
  border-top: 1px solid var(--study-line);
}

.study-option-body.decision-list {
  padding-top: 16px;
}

.study-option-body.time-plans {
  display: grid;
  padding-top: 16px;
  grid-template-columns: 1fr;
  gap: 0;
}

.study-option-body.time-plans article {
  padding: 18px 0;
}

.study-option-body.time-plans article + article {
  border-top: 1px solid var(--study-line);
  border-left: 0;
}

.study-option-body.time-plans .time-plans__time {
  font-size: 29px;
}

.study-options .study-principle {
  margin-top: 30px;
}

@media (max-width: 960px) {
  .course-resources__heading {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .course-resources__heading > p {
    max-width: 720px;
  }

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

  .course-resource-shelf__intro {
    min-height: 0;
  }

  .course-resource-shelf__code {
    margin-bottom: 24px;
  }

  .course-resource-shelf__intro > p:last-of-type {
    max-width: 680px;
  }

  .course-resource-shelf__intro > a {
    margin-top: 0;
  }

  .teacher-resources__layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .teacher-resources__intro {
    position: static;
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(240px, .7fr);
    gap: 14px 50px;
  }

  .teacher-resources__intro .study-eyebrow,
  .teacher-resources__intro h2 {
    grid-column: 1;
  }

  .teacher-resources__intro > p:last-of-type {
    grid-column: 1;
  }

  .teacher-resources__guide {
    margin: 0;
    padding: 22px;
    grid-column: 2;
    grid-row: 1 / 4;
    border: 1px solid rgba(255, 255, 255, .13);
    border-radius: 4px 18px 4px 18px;
  }
}

@media (max-width: 700px) {
  .study-hub .study-hero__inner {
    min-height: auto;
  }

  .study-hub-nav {
    top: 64px;
    overflow-x: auto;
  }

  .study-hub-nav > div {
    width: max-content;
    min-width: 100%;
    min-height: 56px;
  }

  .study-hub-nav a {
    min-width: 142px;
    padding: 10px 14px;
    font-size: 9px;
  }

  .study-hub .path-section,
  .course-resources,
  .teacher-resources,
  .study-options {
    padding: 58px 0;
  }

  .course-resource-list {
    gap: 17px;
  }

  .course-resource-shelf__intro,
  .course-resource-shelf__resources {
    padding: 26px 21px;
  }

  .course-resource-shelf__code {
    width: 43px;
    height: 43px;
    margin-bottom: 20px;
  }

  .course-resource-shelf__topline {
    display: block;
  }

  .course-resource-shelf__topline > p {
    margin-top: 7px;
    text-align: left;
  }

  .course-resource-feed {
    display: flex;
    width: calc(100% + 21px);
    overflow-x: auto;
    padding: 2px 21px 15px 0;
    gap: 11px;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
  }

  .course-resource-feed::-webkit-scrollbar,
  .teacher-resource-feed::-webkit-scrollbar {
    display: none;
  }

  .course-resource-card {
    width: min(80vw, 300px);
    min-width: min(80vw, 300px);
    min-height: 200px;
    scroll-snap-align: start;
  }

  .course-resource-feed .feed-status,
  .course-resource-feed .managed-feed__more,
  .course-resource-feed .managed-feed__updated {
    width: calc(100vw - 70px);
    min-width: calc(100vw - 70px);
  }

  .teacher-resources__intro {
    display: block;
  }

  .teacher-resources__guide {
    margin-top: 28px;
  }

  .teacher-resources__topline {
    display: block;
  }

  .teacher-resources__topline p {
    margin-top: 8px;
  }

  .teacher-resource-feed {
    display: flex;
    width: calc(100% + 14px);
    overflow-x: auto;
    padding: 2px 14px 15px 0;
    gap: 11px;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
  }

  .study-option-grid {
    grid-template-columns: 1fr;
  }

  .teacher-resource-card {
    width: min(80vw, 300px);
    min-width: min(80vw, 300px);
    min-height: 225px;
    scroll-snap-align: start;
  }

  .teacher-resource-feed .feed-status,
  .teacher-resource-feed .managed-feed__more,
  .teacher-resource-feed .managed-feed__updated {
    width: calc(100vw - 56px);
    min-width: calc(100vw - 56px);
  }

  .study-option-grid summary {
    min-height: 145px;
    padding: 24px 20px;
    grid-template-columns: 38px minmax(0, 1fr) 24px;
    gap: 12px;
  }

  .study-option-body {
    padding-inline: 20px;
  }

  .study-hub .study-hero__note {
    padding: 21px;
  }

  .study-hub .study-hero__note hr,
  .study-hub .study-hero__note .note-points {
    display: none;
  }
}

@media print {
  .study-hub-nav,
  .study-option-grid summary > b {
    display: none !important;
  }

  .teacher-resources {
    color: #000;
    background: #fff !important;
  }

  .teacher-resource-card {
    color: #000;
    border-color: #bbb;
    background: #fff;
  }
}