.course-detail {
  --course-primary: #157a61;
  --course-primary-dark: #0f5f4b;
  --course-accent: #0f8276;
  --course-ink: #142620;
  --course-muted: #687a73;
  --course-line: rgba(21, 122, 97, 0.12);
  --course-soft: #e8f4f0;
  --course-glass: rgba(255, 255, 255, 0.78);
  width: 100%;
  max-width: 1540px;
  margin: 0 auto 2.5rem;
  color: var(--course-ink);
}

.course-detail a {
  text-decoration: none;
}

.course-detail__hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 275px;
  gap: 2rem;
  align-items: end;
  min-height: 280px;
  padding: 2.35rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.86);
  border-radius: 6px;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.9), rgba(238, 248, 245, 0.7)),
    radial-gradient(circle at 88% 10%, rgba(15, 130, 118, 0.22), transparent 17rem);
  box-shadow: 0 18px 48px rgba(24, 64, 52, 0.08);
  backdrop-filter: blur(18px);
}

.course-detail__hero::after {
  content: "";
  position: absolute;
  top: -78px;
  right: 16%;
  width: 220px;
  height: 220px;
  border: 1px solid rgba(21, 122, 97, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.course-detail__hero-copy,
.course-detail__progress-card {
  position: relative;
  z-index: 1;
}

.course-detail__back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.35rem;
  color: var(--course-primary-dark);
  font-size: 0.72rem;
  font-weight: 700;
}

.course-detail__back:hover {
  color: var(--course-accent);
}

.course-detail__eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.8rem;
  color: var(--course-muted);
  font-size: 0.69rem;
  font-weight: 700;
}

.course-detail__access {
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  padding: 0.32rem 0.55rem;
  border-radius: 4px;
}

.course-detail__access--open {
  background: #dcf2ea;
  color: #11634e;
}

.course-detail__hero h1 {
  max-width: 850px;
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(2rem, 3.2vw, 3.2rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.045em;
}

.course-detail__hero-copy > p {
  max-width: 820px;
  margin: 1rem 0 1.2rem;
  color: var(--course-muted);
  font-size: 0.82rem;
  line-height: 1.65;
}

.course-detail__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.25rem;
  color: #62766e;
  font-size: 0.7rem;
  font-weight: 600;
}

.course-detail__meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.course-detail__meta i {
  color: var(--course-primary);
}

.course-detail__progress-card {
  padding: 1.2rem;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 12px 30px rgba(24, 64, 52, 0.08);
  backdrop-filter: blur(16px);
}

.course-detail__progress-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.course-detail__progress-head > div {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.course-detail__progress-head span,
.course-detail__progress-card p {
  color: var(--course-muted);
  font-size: 0.67rem;
  font-weight: 600;
}

.course-detail__progress-head strong {
  color: var(--course-ink);
  font-size: 1.65rem;
  line-height: 1;
}

.course-detail__progress-icon {
  width: 39px;
  height: 39px;
  display: grid;
  place-items: center;
  border-radius: 5px;
  background: var(--course-soft);
  color: var(--course-primary) !important;
}

.course-detail__progress-bar {
  height: 6px;
  margin-top: 1rem;
  overflow: hidden;
  border-radius: 3px;
  background: #dfe9e5;
}

.course-detail__progress-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--course-primary), #28a88b);
}

.course-detail__progress-card p {
  margin: 0.65rem 0 0;
}

.course-detail__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
  gap: 1rem;
  align-items: start;
  margin-top: 1rem;
}

.course-detail__workspace {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.course-detail__player-card,
.course-detail__overview,
.course-detail__curriculum {
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 6px;
  background: var(--course-glass);
  box-shadow: 0 14px 36px rgba(24, 64, 52, 0.07);
  backdrop-filter: blur(16px);
}

.course-detail__player-card {
  padding: 1rem;
}

.course-detail__player-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.2rem 0.15rem 0.9rem;
}

.course-detail__player-heading > div {
  min-width: 0;
}

.course-detail__player-heading span,
.course-detail__section-heading > div > span,
.course-detail__curriculum-head span {
  color: #82918c;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.course-detail__player-heading h2,
.course-detail__section-heading h2,
.course-detail__curriculum-head h2 {
  margin: 0.22rem 0 0;
  color: var(--course-ink);
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.course-detail__duration {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.55rem;
  border-radius: 4px;
  background: var(--course-soft);
  color: var(--course-primary-dark) !important;
  letter-spacing: 0 !important;
  text-transform: none !important;
}

.course-detail__video {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 5px;
  background: #0b1714;
  box-shadow: 0 12px 30px rgba(11, 23, 20, 0.18);
}

.course-detail__video iframe {
  display: block;
  border: 0;
}

.course-detail__player-language {
  width: fit-content;
  max-width: 100%;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 0.75rem auto;
  padding: 0.34rem;
  border: 1px solid rgba(21, 122, 97, 0.16);
  border-radius: 6px;
  background: #eef7f4;
  box-shadow: 0 8px 20px rgba(24, 64, 52, 0.08);
  backdrop-filter: blur(14px);
  transition: gap 260ms ease, padding 260ms ease, background-color 260ms ease, box-shadow 260ms ease;
}

.course-detail__language-label {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  padding: 0 0.38rem;
  color: var(--course-primary-dark);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.course-detail__language-label i {
  color: var(--course-primary);
  font-size: 0.74rem;
}

.course-detail__language-label-text {
  max-width: 72px;
  overflow: hidden;
  opacity: 1;
  transition: max-width 260ms ease, opacity 180ms ease;
}

.course-detail__language-options {
  display: flex;
  gap: 0.2rem;
  padding: 0.18rem;
  border-radius: 5px;
  background: rgba(21, 122, 97, 0.07);
  transition: gap 260ms ease, padding 260ms ease, background-color 260ms ease;
}

.course-detail__language-options a {
  max-width: 110px;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.38rem;
  padding: 0.45rem 0.72rem;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--course-primary-dark);
  font-size: 0.67rem;
  font-weight: 750;
  overflow: hidden;
  white-space: nowrap;
  opacity: 1;
  transition: max-width 280ms ease, padding 280ms ease, border-width 280ms ease, background-color 180ms ease, border-color 180ms ease, color 180ms ease, opacity 180ms ease, box-shadow 180ms ease;
}

.course-detail__language-options a:hover {
  border-color: rgba(21, 122, 97, 0.16);
  background: rgba(21, 122, 97, 0.1);
  color: var(--course-primary-dark);
}

.course-detail__language-options a:focus-visible {
  outline: 2px solid #8be1c9;
  outline-offset: 2px;
}

.course-detail__language-options a.is-active {
  border-color: rgba(21, 122, 97, 0.22);
  background: #fff;
  box-shadow: 0 4px 12px rgba(21, 83, 64, 0.12);
  color: var(--course-primary-dark);
}

.course-detail__language-options a.is-active i {
  font-size: 0.58rem;
}

.course-detail__language-name {
  max-width: 80px;
  overflow: hidden;
  opacity: 1;
  transition: max-width 260ms ease, opacity 160ms ease;
}

.course-detail__language-code {
  max-width: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-width 260ms ease, opacity 180ms ease;
}

.course-detail__player-language.is-minimized {
  gap: 0.12rem;
  padding: 0.25rem;
  background: #eef7f4;
  box-shadow: 0 7px 18px rgba(21, 83, 64, 0.08);
}

.course-detail__player-language.is-minimized .course-detail__language-label {
  gap: 0;
  padding-inline: 0.3rem;
}

.course-detail__player-language.is-minimized .course-detail__language-label-text {
  max-width: 0;
  opacity: 0;
}

.course-detail__player-language.is-minimized .course-detail__language-options {
  gap: 0;
  padding: 0.14rem;
  background: rgba(21, 122, 97, 0.07);
}

.course-detail__player-language.is-minimized .course-detail__language-options a:not(.is-active) {
  max-width: 0;
  padding-inline: 0;
  border-width: 0;
  opacity: 0;
  pointer-events: none;
}

.course-detail__player-language.is-minimized .course-detail__language-options a.is-active {
  max-width: 52px;
  min-height: 30px;
  gap: 0;
  padding: 0.36rem 0.52rem;
}

.course-detail__player-language.is-minimized .course-detail__language-name,
.course-detail__player-language.is-minimized .course-detail__language-options a.is-active i {
  max-width: 0;
  overflow: hidden;
  opacity: 0;
}

.course-detail__player-language.is-minimized .course-detail__language-code {
  max-width: 24px;
  opacity: 1;
}

.course-detail__empty-player {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  color: #dbe9e4;
  text-align: center;
}

.course-detail__empty-player i {
  margin-bottom: 0.3rem;
  font-size: 1.5rem;
}

.course-detail__empty-player span {
  color: #8fa29b;
  font-size: 0.72rem;
}

.course-detail__lesson-nav {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.9rem;
}

.course-detail__lesson-nav form {
  margin: 0;
}

.course-detail__button {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.58rem 0.8rem;
  border: 1px solid transparent;
  border-radius: 4px;
  font: inherit;
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.course-detail__button:hover {
  transform: translateY(-1px);
}

.course-detail__button--primary {
  background: var(--course-primary);
  box-shadow: 0 8px 18px rgba(21, 122, 97, 0.17);
  color: #fff;
}

.course-detail__button--primary:hover {
  background: var(--course-primary-dark);
  color: #fff;
}

.course-detail__button--secondary {
  border-color: var(--course-line);
  background: rgba(255, 255, 255, 0.78);
  color: var(--course-primary-dark);
}

.course-detail__button--retry {
  border-color: rgba(180, 94, 39, 0.14);
  background: #fff0e6;
  color: #a14d1e;
}

.course-detail__button--quiz {
  background: linear-gradient(135deg, var(--course-primary), var(--course-accent));
}

.course-detail__quiz-note {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid rgba(180, 94, 39, 0.12);
  border-radius: 4px;
  background: #fff7f0;
  color: #8d4a25;
  font-size: 0.7rem;
  line-height: 1.5;
}

.course-detail__overview {
  padding: 1.25rem;
}

.course-detail__section-heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.course-detail__section-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 5px;
  background: var(--course-soft);
  color: var(--course-primary);
}

.course-detail__overview > p {
  margin: 1rem 0 0;
  color: var(--course-muted);
  font-size: 0.77rem;
  line-height: 1.7;
}

.course-detail__plan {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1rem;
  padding: 0.75rem;
  border: 1px solid var(--course-line);
  border-radius: 5px;
  background: rgba(238, 247, 244, 0.72);
  color: var(--course-ink);
}

.course-detail__plan:hover {
  border-color: rgba(21, 122, 97, 0.24);
  color: var(--course-ink);
}

.course-detail__plan > span {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  background: #fff;
  color: #b44238;
}

.course-detail__plan div {
  display: flex;
  flex-direction: column;
  gap: 0.16rem;
}

.course-detail__plan strong {
  font-size: 0.72rem;
}

.course-detail__plan small {
  color: var(--course-muted);
  font-size: 0.65rem;
}

.course-detail__plan > i {
  color: var(--course-primary);
}

.course-detail__curriculum {
  position: sticky;
  top: 1rem;
  overflow: hidden;
}

.course-detail__curriculum-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--course-line);
}

.course-detail__curriculum-head > strong {
  min-width: 42px;
  min-height: 30px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  background: var(--course-soft);
  color: var(--course-primary-dark);
  font-size: 0.68rem;
}

.course-detail__lesson-list {
  max-height: min(650px, calc(100vh - 190px));
  overflow-y: auto;
  padding: 0.45rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(21, 122, 97, 0.25) transparent;
}

.course-detail__lesson {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.68rem;
  align-items: center;
  padding: 0.72rem 0.65rem;
  border: 1px solid transparent;
  border-radius: 5px;
  color: var(--course-ink);
  transition: background 0.18s ease, border-color 0.18s ease;
}

.course-detail__lesson:hover {
  background: rgba(238, 247, 244, 0.72);
  color: var(--course-ink);
}

.course-detail__lesson.is-current {
  border-color: rgba(21, 122, 97, 0.15);
  background: #edf7f3;
}

.course-detail__lesson-number {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--course-line);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.78);
  color: #74857f;
  font-size: 0.65rem;
  font-weight: 800;
}

.course-detail__lesson.is-complete .course-detail__lesson-number {
  border-color: transparent;
  background: var(--course-primary);
  color: #fff;
}

.course-detail__lesson.is-current:not(.is-complete) .course-detail__lesson-number {
  border-color: rgba(21, 122, 97, 0.25);
  color: var(--course-primary);
}

.course-detail__lesson-copy {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.27rem;
}

.course-detail__lesson-copy strong {
  overflow: hidden;
  font-size: 0.72rem;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-detail__lesson-copy small {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: #82918c;
  font-size: 0.61rem;
}

.course-detail__lesson.is-current .course-detail__lesson-copy small,
.course-detail__lesson-action {
  color: var(--course-primary);
}

.course-detail__lesson-action {
  font-size: 0.62rem;
}

.course-detail__empty-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 2.2rem 1rem;
  color: var(--course-muted);
  font-size: 0.7rem;
  text-align: center;
}

.course-detail__empty-list i {
  color: var(--course-primary);
  font-size: 1.25rem;
}

.course-detail .progress-popup-overlay {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(7, 24, 19, 0.64);
  backdrop-filter: blur(11px) saturate(0.9);
  animation: progress-overlay-in 280ms ease both;
}

.course-detail .progress-popup {
  position: relative;
  width: min(460px, 100%);
  max-height: calc(100vh - 2rem);
  padding: 1.7rem;
  overflow: auto;
  border: 1px solid rgba(255, 255, 255, 0.86);
  border-radius: 6px;
  background: rgba(250, 253, 252, 0.97);
  box-shadow: 0 28px 80px rgba(0, 14, 10, 0.32);
  text-align: center;
  animation: progress-popup-in 420ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.course-detail .progress-popup::before {
  content: "";
  position: absolute;
  top: -105px;
  left: 50%;
  width: 240px;
  height: 160px;
  border-radius: 50%;
  background: rgba(62, 181, 145, 0.18);
  filter: blur(18px);
  pointer-events: none;
  transform: translateX(-50%);
}

.course-detail .progress-popup__badge {
  position: relative;
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.38rem 0.58rem;
  border: 1px solid rgba(21, 122, 97, 0.16);
  border-radius: 4px;
  background: #e7f5f0;
  color: var(--course-primary-dark);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.course-detail .progress-popup__badge i {
  color: #259b7e;
}

.course-detail .progress-popup__visual {
  position: relative;
  width: 98px;
  height: 98px;
  display: grid;
  place-items: center;
  margin: 1rem auto 0.75rem;
  border: 1px solid rgba(21, 122, 97, 0.12);
  border-radius: 50%;
  background: rgba(232, 246, 241, 0.9);
  box-shadow: 0 12px 30px rgba(21, 122, 97, 0.12);
}

.course-detail .progress-popup__visual::after {
  content: "";
  position: absolute;
  inset: -6px;
  border: 1px solid rgba(80, 186, 153, 0.22);
  border-radius: inherit;
  animation: progress-success-ring 1.8s ease-out 450ms infinite;
}

.course-detail .progress-popup img {
  display: block;
  width: 76px;
  height: 76px;
  animation: progress-success-icon 520ms cubic-bezier(0.2, 0.9, 0.3, 1.25) 160ms both;
}

.course-detail .progress-popup h2 {
  margin: 0;
  color: var(--course-ink);
  font-size: 1.45rem;
  letter-spacing: -0.035em;
}

.course-detail .progress-popup p {
  max-width: 360px;
  margin: 0.55rem auto 0;
  color: var(--course-muted);
  font-size: 0.76rem;
  line-height: 1.6;
}

.course-detail .progress-popup__status {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
  margin-top: 1.15rem;
}

.course-detail .progress-popup__status-item {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem;
  border: 1px solid rgba(21, 122, 97, 0.1);
  border-radius: 5px;
  background: rgba(236, 247, 243, 0.72);
  text-align: left;
}

.course-detail .progress-popup__status-icon {
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  background: #d8f0e7;
  color: var(--course-primary);
  font-size: 0.72rem;
}

.course-detail .progress-popup__status-item > span:last-child {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
}

.course-detail .progress-popup__status-item small {
  overflow: hidden;
  color: #778a83;
  font-size: 0.57rem;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-detail .progress-popup__status-item strong {
  color: var(--course-ink);
  font-size: 0.7rem;
}

.course-detail .popup-btn {
  width: 100%;
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  margin-top: 1.1rem;
  padding: 0.65rem 1rem;
  border: 0;
  border-radius: 5px;
  background: var(--course-primary);
  box-shadow: 0 10px 24px rgba(21, 122, 97, 0.22);
  color: #fff;
  font: inherit;
  font-size: 0.74rem;
  font-weight: 750;
  cursor: pointer;
  transition: background-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.course-detail .popup-btn:hover {
  background: var(--course-primary-dark);
  box-shadow: 0 13px 28px rgba(15, 95, 75, 0.28);
  transform: translateY(-1px);
}

.course-detail .popup-btn:focus-visible {
  outline: 3px solid rgba(47, 165, 132, 0.28);
  outline-offset: 3px;
}

.course-detail .progress-popup__note {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.75rem;
  color: #7a8b85;
  font-size: 0.59rem;
  font-weight: 650;
}

.course-detail .progress-popup__note i {
  color: var(--course-primary);
}

@keyframes progress-overlay-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes progress-popup-in {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes progress-success-icon {
  from {
    opacity: 0;
    transform: scale(0.62) rotate(-8deg);
  }
  to {
    opacity: 1;
    transform: scale(1) rotate(0);
  }
}

@keyframes progress-success-ring {
  0% {
    opacity: 0.7;
    transform: scale(0.92);
  }
  75%,
  100% {
    opacity: 0;
    transform: scale(1.16);
  }
}

@media (max-width: 1180px) {
  .course-detail__layout {
    grid-template-columns: minmax(0, 1fr) 310px;
  }
}

@media (max-width: 980px) {
  .course-detail__hero {
    grid-template-columns: 1fr;
  }

  .course-detail__progress-card {
    width: min(360px, 100%);
  }

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

  .course-detail__curriculum {
    position: static;
  }

  .course-detail__lesson-list {
    max-height: none;
  }
}

@media (max-width: 680px) {
  .course-detail {
    margin-bottom: 1.5rem;
  }

  .course-detail__hero {
    min-height: 0;
    padding: 1.4rem;
  }

  .course-detail__hero h1 {
    font-size: 2rem;
  }

  .course-detail__player-heading {
    align-items: flex-start;
  }

  .course-detail__lesson-nav {
    align-items: stretch;
    flex-direction: column-reverse;
  }

  .course-detail__lesson-nav > div,
  .course-detail__button,
  .course-detail__lesson-nav form {
    width: 100%;
  }

  .course-detail__button {
    min-height: 44px;
  }
}

@media (max-width: 440px) {
  .course-detail__hero {
    padding: 1.15rem;
  }

  .course-detail__hero h1 {
    font-size: 1.65rem;
  }

  .course-detail__meta {
    align-items: flex-start;
    flex-direction: column;
  }

  .course-detail__player-card {
    padding: 0.7rem;
  }

  .course-detail__player-language {
    gap: 0.25rem;
    padding: 0.25rem;
  }

  .course-detail__language-label {
    gap: 0;
    padding: 0 0.25rem;
    font-size: 0;
  }

  .course-detail__language-label i {
    font-size: 0.72rem;
  }

  .course-detail__language-options a {
    min-height: 30px;
    padding: 0.36rem 0.52rem;
    font-size: 0.61rem;
  }

  .course-detail__duration {
    display: none;
  }

  .course-detail__lesson {
    padding-inline: 0.45rem;
  }

  .course-detail .progress-popup-overlay {
    padding: 0.7rem;
  }

  .course-detail .progress-popup {
    max-height: calc(100vh - 1.4rem);
    padding: 1.25rem;
  }

  .course-detail .progress-popup__visual {
    width: 84px;
    height: 84px;
    margin-top: 0.75rem;
  }

  .course-detail .progress-popup img {
    width: 66px;
    height: 66px;
  }

  .course-detail .progress-popup__status {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .course-detail *,
  .course-detail *::before,
  .course-detail *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}