:root {
  --course-accent: #339B9C;
  --course-accent-hover: #2c8788;
  --course-heading: #23463b;
  --course-text: #4f5f5c;
  --course-text-strong: #314644;
  --course-muted: #6f7f7c;
  --course-surface: #fffdf8;
  --course-surface-alt: #f7f4ec;
  --course-surface-soft: #f3efe5;
  --course-border: #ece7dc;
  --course-border-strong: #d8e1de;
  --course-shadow: 0 18px 40px rgba(43, 46, 43, 0.10);
  --course-shadow-soft: 0 12px 26px rgba(43, 46, 43, 0.08);
}

.course-mode-submenu {
  padding: 10px;
  background: #339B9C;
}

.course-mode-shell {
  background: linear-gradient(180deg, #f7f4ec 0%, #fffdf8 360px);
  min-height: 100vh;
}

.course-mode-hero {
  padding: 32px 18px 18px;
}

.course-mode-eyebrow {
  color: var(--course-accent);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.course-mode-eyebrow a,
.course-mode-eyebrow a:hover,
.course-mode-eyebrow a:focus {
  color: inherit;
  text-decoration: none;
}

.course-mode-eyebrow-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.course-mode-eyebrow-back::before {
  content: '\2039';
  font-size: 1.2em;
  line-height: 1;
}

.course-mode-title {
  margin-top: 10px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.05;
  color: var(--course-heading);
}

.course-mode-intro {
  max-width: 760px;
  color: var(--course-text-strong);
  font-size: 1.05rem;
}

.course-mode-intro p:last-child {
  margin-bottom: 0;
}

.course-chapter-hero .course-mode-title,
.course-chapter-hero .course-mode-intro,
.course-chapter-hero .course-mode-eyebrow {
  position: relative;
  z-index: 1;
}

.course-mode-statbar {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.course-mode-stat {
  background: var(--course-surface);
  border: 1px solid var(--course-border);
  border-radius: 14px;
  padding: 16px 18px;
  box-shadow: var(--course-shadow-soft);
}

.course-mode-stat-label {
  display: block;
  color: #6f8f88;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 700;
}

.course-mode-stat-value {
  display: block;
  margin-top: 6px;
  color: var(--course-heading);
  font-size: 1.45rem;
  font-weight: 700;
}

.course-mode-layout {
  padding-bottom: 48px;
}

.course-mode-card,
.course-mode-sidebar-card {
  background: var(--course-surface);
  border: 1px solid var(--course-border);
  border-radius: 14px;
  box-shadow: var(--course-shadow);
}

.course-mode-card {
  padding: 28px 28px 22px;
}

.course-mode-nav-card {
  margin-top: 18px;
}

.course-mode-sidebar-card {
  padding: 22px;
  margin-bottom: 18px;
}

.course-mode-sidebar-title {
  margin: 0 0 10px;
  color: var(--course-heading);
  font-size: 1.35rem;
}

.course-mode-sidebar-copy {
  color: var(--course-text);
  line-height: 1.65;
}

.course-mode-type {
  display: block;
  margin-bottom: 16px;
  padding: 0;
  background: transparent;
  color: #6f8f88;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.course-mode-content h1,
.course-mode-content h2,
.course-mode-content h3 {
  color: var(--course-heading);
}

.course-mode-content p,
.course-mode-content li {
  color: var(--course-text);
  line-height: 1.7;
}

.course-mode-content img {
  max-width: 100%;
  height: auto;
}

.course-mode-words-table {
  margin-top: 20px;
}

.course-mode-words-table th {
  color: var(--course-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.course-mode-subtabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 6px 0 22px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--course-border);
}

.course-mode-subtabs .filtermenu.active {
  color: var(--course-accent);
}

.course-mode-word-summary {
  margin-top: 10px;
}

.course-mode-word-count {
  margin: 0;
  color: var(--course-muted);
  font-weight: 700;
}

.course-mode-word-actions-cell {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.course-mode-word-btn {
  border: 1px solid var(--course-border-strong);
  background: var(--course-surface);
  border-radius: 10px;
  padding: 6px 10px;
  color: var(--course-accent);
  font-size: 0.88rem;
}

.course-mode-quiz-settings {
  margin-top: 24px;
}

.course-mode-choice {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0;
  color: var(--course-text-strong);
}

.course-mode-choice input[type='radio'] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  margin: 0;
  border: 1px solid #7f9995;
  border-radius: 50%;
  background: var(--course-surface);
  flex: 0 0 auto;
  position: relative;
}

.course-mode-choice input[type='radio']:checked::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  background: var(--course-accent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.course-mode-choice input[type='radio']:disabled {
  background: var(--course-surface-alt);
  border-color: #c1d3d0;
}

.course-mode-choice input[type='checkbox'] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  margin: 0;
  border: 1px solid #7f9995;
  border-radius: 4px;
  background: var(--course-surface);
  flex: 0 0 auto;
  position: relative;
}

.course-mode-choice input[type='checkbox']:checked::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid var(--course-accent);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.course-mode-choice input[type='checkbox']:disabled {
  background: var(--course-surface-alt);
  border-color: #c1d3d0;
}

.course-mode-quiz-prompt {
  margin: 8px 0 16px;
  color: var(--course-heading);
}

.course-mode-quiz-input {
  min-height: 50px;
  border-radius: 12px;
  border-color: var(--course-border-strong);
  background: #fff;
}

.course-mode-quiz-feedback {
  margin-top: 12px;
  font-weight: 700;
}

.course-mode-quiz-feedback.is-success {
  color: var(--course-accent);
}

.course-mode-quiz-feedback.is-error {
  color: #a13647;
}

.course-mode-error-list {
  margin-top: 16px;
  padding-left: 20px;
}

.course-mode-listening-audio {
  width: 100%;
  margin-top: 8px;
}

.course-mode-listening-question {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--course-border);
  border-radius: 14px;
  background: var(--course-surface);
}

.course-mode-listening-question-head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--course-heading);
}

.course-mode-listening-icon {
  font-size: 0.85rem;
  color: var(--course-muted);
  white-space: nowrap;
}

.course-mode-listening-options {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.course-mode-listening-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--course-border);
  border-radius: 12px;
  background: var(--course-surface-alt);
  color: var(--course-text-strong);
}

.course-mode-listening-option input[type='radio'] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  border: 1px solid #7f9995;
  border-radius: 50%;
  background: var(--course-surface);
  flex: 0 0 auto;
  position: relative;
}

.course-mode-listening-option input[type='radio']:checked::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  background: var(--course-accent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.course-mode-listening-question.is-correct {
  border-color: #78c5c6;
  background: #f3fbfb;
}

.course-mode-listening-question.is-wrong,
.course-mode-listening-question.is-missing {
  border-color: #d38b99;
  background: #fff7f8;
}

.course-mode-listening-question.is-revealed {
  border-color: #c5d4d2;
  background: var(--course-surface-alt);
}

.course-mode-listening-feedback {
  margin-top: 18px;
  font-weight: 700;
}

.course-mode-listening-feedback.is-success {
  color: var(--course-accent);
}

.course-mode-listening-feedback.is-error {
  color: #a13647;
}

.course-mode-chat-app {
  margin-top: 24px;
}

.course-mode-chat-toolbar {
  display: flex;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.course-email-card .course-mode-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 14px;
  margin-top: 18px;
}

.course-toggle {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  color: var(--course-text-strong);
  font-weight: 700;
}

.course-toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.course-toggle-slider {
  position: relative;
  width: 56px;
  height: 32px;
  border-radius: 999px;
  background: #d8e1de;
  transition: background 0.18s ease;
  box-shadow: inset 0 0 0 1px rgba(35, 70, 59, 0.08);
  flex: 0 0 auto;
}

.course-toggle-slider::before {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fffdf8;
  box-shadow: 0 4px 10px rgba(43, 46, 43, 0.16);
  transition: transform 0.18s ease;
}

.course-toggle input:checked + .course-toggle-slider {
  background: var(--course-accent);
}

.course-toggle input:checked + .course-toggle-slider::before {
  transform: translateX(24px);
}

.course-toggle input:disabled + .course-toggle-slider {
  opacity: 0.6;
}

.course-toggle-label {
  line-height: 1.35;
}

.course-email-feedback {
  margin: 14px 0 0;
  font-weight: 700;
}

.course-email-feedback.is-success {
  color: #5f7d76;
}

.course-email-feedback.is-error {
  color: #a13647;
}

.course-mode-chat-level {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 200px;
  color: var(--course-text-strong);
  font-weight: 700;
}

.course-mode-chat-level .form-control {
  border-radius: 12px;
  border-color: var(--course-border-strong);
  background: #fff;
}

.course-mode-chat-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-height: 560px;
  overflow-y: auto;
  padding: 20px;
  border: 1px solid var(--course-border);
  border-radius: 18px;
  background: var(--course-surface-alt);
}

.course-mode-chat-message {
  display: flex;
  align-items: flex-end;
  gap: 12px;
}

.course-mode-chat-message.is-user {
  justify-content: flex-end;
}

.course-mode-chat-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 8px 18px rgba(43, 46, 43, 0.12);
}

.course-mode-chat-bubble {
  max-width: 82%;
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--course-surface);
  border: 1px solid var(--course-border);
}

.course-mode-chat-message.is-user .course-mode-chat-bubble {
  background: var(--course-accent);
  border-color: var(--course-accent);
}

.course-mode-chat-message.is-user .course-mode-chat-bubble,
.course-mode-chat-message.is-user .course-mode-chat-bubble p,
.course-mode-chat-message.is-user .course-mode-chat-label {
  color: #fff;
}

.course-mode-chat-label {
  margin-bottom: 6px;
  color: var(--course-muted);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.course-mode-chat-content p:last-child {
  margin-bottom: 0;
}

.course-mode-chat-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.course-mode-chat-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--course-border-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--course-heading);
  font-size: 0.88rem;
  font-weight: 700;
}

.course-mode-chat-action.is-translate {
  justify-content: flex-start;
}

.course-mode-chat-message.is-user .course-mode-chat-action {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.28);
}

.course-mode-chat-status {
  margin: 12px 4px 0;
  color: var(--course-muted);
  font-weight: 700;
}

.course-mode-chat-form {
  margin-top: 16px;
}

.course-mode-chat-form .form-control {
  border-radius: 14px;
  border-color: var(--course-border-strong);
  background: #fff;
}

.course-mode-hover-word {
  position: relative;
  color: var(--course-accent);
  font-weight: 700;
  cursor: help;
}

.course-mode-hover-word::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 0;
  padding: 6px 8px;
  border: 1px solid var(--course-border);
  border-radius: 8px;
  background: var(--course-surface);
  color: var(--course-text-strong);
  white-space: nowrap;
  box-shadow: var(--course-shadow-soft);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
  z-index: 5;
}

.course-mode-hover-word:hover::after {
  opacity: 1;
}

.course-mode-reading-question {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--course-border);
  border-radius: 14px;
  background: var(--course-surface);
}

.course-mode-reading-question-head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--course-heading);
}

.course-mode-reading-icon {
  font-size: 0.85rem;
  color: var(--course-muted);
  white-space: nowrap;
}

.course-mode-reading-options {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.course-mode-reading-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--course-border);
  border-radius: 12px;
  background: var(--course-surface-alt);
  color: var(--course-text-strong);
}

.course-mode-reading-option input[type='radio'] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  border: 1px solid #7f9995;
  border-radius: 50%;
  background: var(--course-surface);
  flex: 0 0 auto;
  position: relative;
}

.course-mode-reading-option input[type='radio']:checked::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  background: var(--course-accent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.course-mode-reading-question.is-correct {
  border-color: #78c5c6;
  background: #f3fbfb;
}

.course-mode-reading-question.is-wrong,
.course-mode-reading-question.is-missing {
  border-color: #d38b99;
  background: #fff7f8;
}

.course-mode-reading-question.is-revealed {
  border-color: #c5d4d2;
  background: var(--course-surface-alt);
}

.course-mode-reading-feedback {
  margin-top: 18px;
  font-weight: 700;
}

.course-mode-reading-feedback.is-success {
  color: var(--course-accent);
}

.course-mode-reading-feedback.is-error {
  color: #a13647;
}

.course-mode-exercise-question {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--course-border);
  border-radius: 14px;
  background: var(--course-surface);
}

.course-mode-exercise-question-head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--course-heading);
}

.course-mode-exercise-icon {
  font-size: 0.85rem;
  color: var(--course-muted);
  white-space: nowrap;
}

.course-mode-exercise-answer {
  margin-top: 12px;
}

.course-mode-exercise-input {
  min-height: 48px;
  border-radius: 12px;
  border-color: var(--course-border-strong);
  background: #fff;
}

.course-mode-exercise-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 10px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--course-border);
  border-radius: 12px;
  background: var(--course-surface-alt);
  color: var(--course-text-strong);
}

.course-mode-exercise-option input[type='radio'] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  border: 1px solid #7f9995;
  border-radius: 50%;
  background: var(--course-surface);
  flex: 0 0 auto;
  position: relative;
}

.course-mode-exercise-option input[type='radio']:checked::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  background: var(--course-accent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.course-mode-exercise-question.is-correct {
  border-color: #78c5c6;
  background: #f3fbfb;
}

.course-mode-exercise-question.is-wrong,
.course-mode-exercise-question.is-missing {
  border-color: #d38b99;
  background: #fff7f8;
}

.course-mode-exercise-question.is-revealed {
  border-color: #c5d4d2;
  background: var(--course-surface-alt);
}

.course-mode-exercise-feedback {
  margin-top: 18px;
  font-weight: 700;
}

.course-mode-exercise-feedback.is-success {
  color: var(--course-accent);
}

.course-mode-exercise-feedback.is-error {
  color: #a13647;
}

.course-mode-preview-box {
  margin-top: 24px;
  padding: 20px;
  background: var(--course-surface-alt);
  border-radius: 16px;
  border: 1px solid var(--course-border);
}

.course-mode-preview-box h2:first-child,
.course-mode-preview-box h3:first-child {
  margin-top: 0;
  padding-top: 0;
}

.course-mode-preview-box > p:last-child {
  margin-bottom: 0;
}

.course-mode-embed-wrap {
  margin-top: 24px;
}

.course-mode-embed-head {
  margin-bottom: 12px;
}

.course-mode-embed-head h2 {
  margin-bottom: 6px;
}

.course-mode-embed {
  width: 100%;
  border: 1px solid #dceae7;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 18px 40px rgba(51, 155, 156, 0.07);
}

.course-mode-embed-tall {
  min-height: 1200px;
}

.course-mode-embed-chat {
  min-height: 980px;
}

.course-mode-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 22px;
  align-items: center;
}

.course-mode-actions-bottom {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--course-border);
}

.course-mode-bottom-nav {
  margin-top: 38px;
}

.course-mode-complete-card {
  padding-top: 18px;
  border-top: 1px solid var(--course-border);
}

.course-mode-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: .25rem;
  text-decoration: none;
  font-weight: 700;
}

.course-mode-btn-primary {
  background: var(--course-accent);
  color: #fff;
  border: 0;
}

.course-mode-btn-primary:hover {
  background: var(--course-accent-hover);
  color: #fff;
}

button.course-mode-btn-primary,
button.course-mode-btn-primary:hover,
button.course-mode-btn-primary:focus,
button.course-mode-btn-primary:active {
  background: var(--course-accent);
  color: #fff;
  border: 0;
  box-shadow: none;
}

button.course-mode-btn-primary:hover {
  background: var(--course-accent-hover);
}

.course-mode-btn-secondary {
  border: 1px solid var(--course-border-strong);
  background: transparent;
  color: var(--course-heading);
}

.course-mode-btn-secondary:hover {
  color: var(--course-heading);
  background: #edf3f1;
}

.course-mode-navlist {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.course-mode-navitem {
  display: block;
  padding: 12px 14px;
  border-radius: 12px;
  text-decoration: none;
  border: 1px solid var(--course-border);
  color: var(--course-text-strong);
  background: var(--course-surface);
}

.course-mode-navitem:hover {
  text-decoration: none;
  color: var(--course-heading);
  background: var(--course-surface-alt);
  box-shadow: var(--course-shadow-soft);
}

.course-mode-navitem.is-current {
  border-color: #78c5c6;
  background: #edf8f8;
}

.course-mode-navmeta {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 0.82rem;
  color: var(--course-muted);
}

.course-mode-status {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: #dff4e5;
  color: #247846;
  font-size: 0.78rem;
  font-weight: 700;
}

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

.course-mode-jump {
  display: block;
  padding: 18px;
  border-radius: 16px;
  background: var(--course-surface-alt);
  border: 1px solid var(--course-border);
  text-decoration: none;
  color: var(--course-heading);
}

.course-mode-jump:hover {
  text-decoration: none;
  color: var(--course-heading);
  box-shadow: var(--course-shadow-soft);
}

.course-mode-jump small {
  display: block;
  color: var(--course-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.course-mode-sidebar-title {
  margin-bottom: 12px;
  color: var(--course-heading);
  font-size: 1rem;
}

.course-mode-sidebar-copy {
  color: var(--course-text);
  line-height: 1.65;
}

.course-mode-sidebar-copy p:last-child {
  margin-bottom: 0;
}

.course-chapter-shell {
  padding-bottom: 32px;
}

.course-chapter-hero {
  padding-bottom: 24px;
  border-radius: 0;
}

.course-chapter-hero-actions {
  align-items: center;
  margin-top: 22px;
}

.course-chapter-cover-card {
  overflow: hidden;
  padding: 0;
}

.course-chapter-cover-image {
  display: block;
  width: 100%;
  height: 260px;
  object-fit: cover;
  background: var(--course-surface-soft);
}

.course-chapter-cover-copy {
  padding: 22px;
}

.course-chapter-section-copy {
  margin-bottom: 22px;
}

.course-chapter-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.course-chapter-list-card {
  margin-top: 18px;
}



.course-chapter-mobile-tip {
  display: none;
  margin-top: 6px;
  padding: 14px 16px;
  border: 1px solid var(--course-border);
  border-radius: 14px;
  background: var(--course-surface-alt);
  color: var(--course-text-strong);
  line-height: 1.6;
}

.course-chapter-item {
  display: block;
}

.course-chapter-item.is-completed {
  opacity: 0.72;
}

.course-chapter-item-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.course-chapter-item-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 74px;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.course-chapter-item-badge--words {
  background: #8AD0DC;
}

.course-chapter-item-badge--article {
  background: #7DA2A9;
}

.course-chapter-item-badge--grammar {
  background: #197866;
}

.course-chapter-item-badge--exercise {
  background: #E69D8E;
}

.course-chapter-item-badge--listening {
  background: #FFA500;
}

.course-chapter-item-badge--chat {
  background: #00BFFF;
}

.course-chapter-item-badge--reading {
  background: #4682B4;
}

.course-chapter-item p {
  margin: 10px 0 0;
  color: var(--course-text);
  line-height: 1.65;
}

.course-chapter-item-action {
  display: inline-flex;
  align-items: center;
  margin-top: 14px;
  color: var(--course-accent);
  font-size: 0.88rem;
  font-weight: 700;
}

.course-chapter-action-grid {
  display: grid;
  gap: 12px;
}

.course-chapter-action {
  display: block;
  padding: 14px 0px 14px;
  border-bottom: 1px solid var(--course-border);
  text-decoration: none;
  color: var(--course-heading);
  border-radius: 10px;
  transition: background-color 0.18s ease, color 0.18s ease, padding 0.18s ease;
}

.course-chapter-action:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.course-chapter-action:hover {
  text-decoration: none;
  color: var(--course-heading);
  background: #edf3f1;
  padding-left: 12px;
  padding-right: 12px;
}

.course-chapter-action-label {
  display: block;
  font-weight: 700;
}

.course-chapter-action-copy {
  display: block;
  margin-top: 6px;
  color: var(--course-text);
  line-height: 1.6;
}

.course-feedback-card {
  display: grid;
  gap: 14px;
}

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

.course-feedback-thumb {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 110px;
  padding: 18px 14px;
  border: 1px solid var(--course-border);
  border-radius: 14px;
  text-align: center;
  color: var(--course-heading);
  background: #fff;
  cursor: pointer;
  font: inherit;
  transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.course-feedback-thumb:hover {
  color: var(--course-heading);
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(25, 74, 66, 0.08);
}

.course-feedback-thumb:disabled {
  cursor: default;
  opacity: 1;
}

.course-feedback-thumb-positive:hover {
  background: #f0fbf7;
  border-color: #b8ddd0;
}

.course-feedback-thumb-negative:hover {
  background: #fff5ef;
  border-color: #ebc5ad;
}

.course-feedback-thumb-icon {
  font-size: 1.8rem;
  line-height: 1;
}

.course-feedback-thumb-label {
  font-weight: 700;
  line-height: 1.4;
}

.course-feedback-thumb.is-selected.course-feedback-thumb-positive {
  background: #f0fbf7;
  border-color: #9fcfbe;
  box-shadow: 0 12px 24px rgba(25, 74, 66, 0.08);
}

.course-feedback-thumb.is-selected.course-feedback-thumb-negative {
  background: #fff5ef;
  border-color: #ebc5ad;
  box-shadow: 0 12px 24px rgba(113, 67, 39, 0.08);
}

.course-feedback-status {
  margin: 0;
  color: var(--course-text);
  line-height: 1.6;
}

.course-feedback-status.is-success {
  color: #24534b;
}

.course-feedback-status.is-error {
  color: #8c3f32;
}

.course-chapter-completion {
  margin-bottom: 18px;
  padding: 16px 18px;
  border: 1px solid #cde6de;
  border-radius: 12px;
  background: #f0fbf7;
  color: #24534b;
}

.course-chapter-completion a {
  color: #20615d;
  font-weight: 700;
  text-decoration: underline;
}

.course-tutorial-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1040;
  background: rgba(12, 31, 30, 0.45);
}

.course-tutorial-card {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 1050;
  width: min(400px, calc(100vw - 32px));
  padding: 24px 24px 22px;
  border: 1px solid var(--course-border);
  border-top: 5px solid var(--course-accent);
  border-radius: 14px;
  background: #fffdf8;
  box-shadow: 0 24px 60px rgba(12, 31, 30, 0.24);
}

.course-tutorial-step {
  margin: 0 0 8px;
  color: var(--course-muted);
  font-size: 0.84rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.course-tutorial-card .course-mode-sidebar-title {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.course-tutorial-card .course-mode-sidebar-copy {
  color: var(--course-text-strong);
}

.course-tutorial-highlight {
  position: relative;
  z-index: 1045;
}

.course-tutorial-highlight::after {
  content: '';
  position: absolute;
  inset: -10px;
  border: 3px solid var(--course-accent);
  border-radius: 20px;
  box-shadow: 0 0 0 4px rgba(255, 253, 248, 0.95), 0 0 0 9999px rgba(12, 31, 30, 0.32);
  pointer-events: none;
  animation: courseTutorialPulse 1.6s ease-in-out infinite;
}

@keyframes courseTutorialPulse {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.01);
  }

  100% {
    transform: scale(1);
  }
}

.course-mode-falina-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.course-mode-falina-panel {
  position: sticky;
  top: 88px;
}

.course-mode-falina-context {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.course-mode-falina-context span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: #edf3f1;
  color: var(--course-text-strong);
  font-size: 0.82rem;
  font-weight: 700;
}

.course-mode-falina-quickactions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 18px;
}

.course-mode-falina-chip {
  padding: 8px 12px;
  border: 1px solid var(--course-border-strong);
  border-radius: 999px;
  background: var(--course-surface);
  color: var(--course-heading);
  font-size: 0.86rem;
  font-weight: 700;
  text-align: left;
}

.course-mode-falina-chip:hover {
  background: var(--course-surface-alt);
}

.course-mode-falina-chat {
  border: 1px solid var(--course-border);
  border-radius: 18px;
  background: var(--course-surface-alt);
  overflow: hidden;
}

.course-mode-falina-chatbox {
  min-height: 320px;
  max-height: 480px;
  padding: 16px 14px 6px;
  overflow-y: auto;
}

.course-mode-falina-chatbox .course-mode-falina-row {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
}

.course-mode-falina-chatbox .course-mode-falina-row.is-user {
  justify-content: flex-end;
}

.course-mode-falina-chatbox .course-mode-falina-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  flex: 0 0 auto;
}

.course-mode-falina-chatbox .course-mode-falina-bubble {
  max-width: calc(100% - 44px);
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--course-surface);
  border: 1px solid var(--course-border);
  color: var(--course-text-strong);
  line-height: 1.6;
}

.course-mode-falina-chatbox .course-mode-falina-row.is-user .course-mode-falina-bubble {
  background: var(--course-accent);
  border-color: var(--course-accent);
  color: #fff;
}

.course-mode-falina-chatbox .course-mode-falina-bubble p:last-child,
.course-mode-falina-chatbox .course-mode-falina-bubble ul:last-child {
  margin-bottom: 0;
}

.course-mode-falina-dock {
  border-top: 1px solid var(--course-border);
  background: var(--course-surface);
}

.course-mode-falina-form {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 0;
}

.course-mode-falina-form input {
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--course-border-strong);
  border-radius: 12px;
}

.course-mode-falina-form button {
  margin-left: 0;
  border-radius: 12px;
  white-space: nowrap;
}

.course-mode-falina-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.course-mode-falina-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  background: #edf3f1;
  color: var(--course-accent);
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
}

.course-mode-falina-link:hover {
  text-decoration: none;
  color: #174946;
  background: #e7f1ef;
}

@media (max-width: 991.98px) {
  .course-mode-layout .order-lg-2 {
    margin-top: 18px;
  }

  .course-mode-falina-panel {
    position: static;
  }

  .course-chapter-cover-image {
    height: 220px;
  }

  .course-tutorial-card {
    right: 18px;
    left: 18px;
    bottom: 18px;
    width: auto;
  }
}

@media (max-width: 767.98px) {
  .course-mode-hero {
    padding: 18px 0 8px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .course-mode-eyebrow {
    font-size: 0.78rem;
    letter-spacing: 0.05em;
  }

  .course-mode-title {
    margin-top: 6px;
    font-size: 1.75rem;
    line-height: 1.12;
  }

  .course-mode-statbar {
    display: none;
  }

  .course-mode-statbar,
  .course-mode-nextprev {
    grid-template-columns: 1fr;
  }

  .course-mode-card,
  .course-mode-sidebar-card {
    padding: 20px;
  }

  .course-mode-actions .course-mode-btn,
  .course-mode-chat-toolbar .course-mode-btn {
    width: 100%;
  }

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

  .course-chapter-hero-actions .dropdown {
    width: 100%;
  }

  .course-chapter-hero-actions .dropdown-toggle {
    width: 100%;
  }

  .course-mode-chat-level {
    width: 100%;
    min-width: 0;
  }

  .course-chapter-cover-card {
    display: none;
  }

  .course-chapter-mobile-tip {
    display: block;
  }

  .course-chapter-item-top {
    flex-direction: column;
  }

  .course-chapter-item-badge {
    display: none;
    min-width: 0;
  }

  .course-tutorial-highlight::after {
    inset: -6px;
    border-radius: 16px;
  }

  .course-mode-falina-chatbox {
    min-height: 240px;
    max-height: 360px;
    padding: 14px 12px 4px;
  }

  .course-mode-falina-form {
    padding: 10px;
  }

  .course-mode-falina-form button {
    padding: 10px 12px;
  }

  .course-mode-submenu {
    padding: 6px 0;
  }

  .course-mode-type {
    margin-bottom: 12px;
    font-size: 12px;
  }

  .course-mode-preview-box {
    margin-top: 18px;
    padding: 16px;
  }

  .course-mode-bottom-nav {
    margin-top: 28px;
  }

  .course-mode-sidebar-card-mobile-hidden {
    display: none;
  }

  .course-mode-chat-bubble {
    max-width: 100%;
  }

  .course-mode-listening-question-head,
  .course-mode-reading-question-head,
  .course-mode-exercise-question-head {
    flex-direction: column;
  }

  .course-mode-listening-icon,
  .course-mode-reading-icon,
  .course-mode-exercise-icon {
    white-space: normal;
  }
}