/* Ready Korean Class & Study */

.rk-cs-app {
  --cs-bg: var(--cream, #f7f5f0);
  --cs-surface: #fff;
  --cs-ink: var(--navy-dark, #0f1623);
  --cs-muted: #5c5a56;
  --cs-line: #e5e0d8;
  --cs-accent: var(--red, #c73e3a);
  --cs-accent-soft: #fde8e7;
  --cs-navy: var(--navy, #1a2332);
  background: var(--cs-bg);
  min-height: 70vh;
  color: var(--cs-ink);
  font-family: "DM Sans", system-ui, sans-serif;
}

.rk-cs-app .learning-kr {
  font-family: "Noto Sans KR", "DM Sans", sans-serif;
  color: #0f1623;
}

.rk-cs-app .hidden,
.rk-cs-app [hidden] {
  display: none !important;
}

.cs-page {
  position: relative;
  z-index: 1;
}

.cs-topbar {
  border-bottom: 1px solid var(--cs-line);
  background: linear-gradient(180deg, rgba(253, 232, 231, 0.55), transparent);
  padding: 1rem 0 0.85rem;
}

.cs-topbar-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  justify-content: space-between;
}

.cs-eyebrow {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cs-accent);
}

.cs-brand h1 {
  margin: 0.2rem 0 0;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
}

.cs-mode-switch {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
  padding: 0.25rem;
  background: var(--cs-surface);
  border: 1px solid var(--cs-line);
  border-radius: 14px;
}

.cs-mode-btn {
  border: 0;
  background: transparent;
  border-radius: 11px;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  font-weight: 700;
  color: var(--cs-muted);
  text-align: left;
  min-width: 8.5rem;
}

.cs-mode-btn span {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  opacity: 0.85;
}

.cs-mode-btn.is-active {
  background: var(--cs-navy);
  color: #fff;
}

.cs-shell {
  display: grid;
  grid-template-columns: minmax(260px, 300px) minmax(0, 1fr);
  gap: 1.1rem;
  padding-block: 1.1rem 2.5rem;
  align-items: start;
}

.cs-sidebar {
  position: sticky;
  top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  max-height: calc(100vh - 2rem);
}

.cs-side-block {
  background: var(--cs-surface);
  border: 1px solid var(--cs-line);
  border-radius: 14px;
  padding: 0.75rem;
}

.cs-side-block--grow {
  flex: 1 1 auto;
  min-height: 0;
  max-height: min(72vh, 560px);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.cs-level-unit-stack {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  gap: 0.55rem;
}

.cs-level-section {
  display: flex;
  flex-direction: column;
  min-height: 0;
  flex-shrink: 0;
}

.cs-unit-section {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  border-top: 1px solid var(--cs-line, #e5e0d8);
  padding-top: 0.55rem;
}

.cs-unit-section .cs-label {
  margin-bottom: 0.4rem;
}

#cs-sejong-block,
#cs-topik-block {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.cs-sejong-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.cs-sejong-tabs-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.35rem;
}

.cs-sejong-tabs-row .cs-daily-tab {
  padding: 0.38rem 0.28rem;
  font-size: 0.74rem;
  text-align: center;
  align-items: center;
}

.cs-sejong-tabs-row .cs-daily-tab small {
  display: none;
}

.cs-label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cs-muted);
}

.cs-label--sub {
  margin: 0.15rem 0 0;
  font-size: 0.65rem;
  letter-spacing: 0.05em;
}

#cs-level-unit-block > .cs-label:first-child {
  margin-bottom: 0;
}

.cs-textbook-line:empty {
  display: none;
}

.cs-track-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
}

.cs-textbook-line:empty {
  display: none;
}

.cs-textbook-line {
  margin: 0.55rem 0 0;
  font-size: 0.75rem;
  line-height: 1.35;
  color: var(--cs-muted);
}

.cs-track-tab {
  border: 1px solid var(--cs-line);
  background: #fff;
  border-radius: 12px;
  padding: 0.55rem 0.45rem;
  cursor: pointer;
  text-align: center;
  font-weight: 750;
  color: var(--cs-ink);
}

.cs-track-tab small {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--cs-muted);
}

.cs-track-tab.is-active {
  border-color: var(--cs-navy);
  background: var(--cs-navy);
  color: #fff;
}

.cs-track-tab.is-active small {
  color: rgba(255, 255, 255, 0.8);
}

.cs-level-tabs,
.cs-grade-tabs,
.cs-daily-tabs {
  display: grid;
  gap: 0.35rem;
}

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

.cs-grade-tabs {
  grid-template-columns: repeat(3, 1fr);
}

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

.cs-level-tab,
.cs-grade-tab,
.cs-daily-tab {
  border: 1px solid var(--cs-line);
  background: #fff;
  border-radius: 10px;
  padding: 0.5rem 0.55rem;
  cursor: pointer;
  text-align: left;
  font-weight: 650;
  color: var(--cs-ink);
}

.cs-daily-tab {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
  padding: 0.32rem 0.35rem;
  font-size: 0.8rem;
}

.cs-level-tab small,
.cs-daily-tab small {
  display: block;
  font-weight: 500;
  color: var(--cs-muted);
  font-size: 0.64rem;
}

.cs-daily-tab .learning-kr {
  color: #0f1623;
}

.cs-level-tab.is-active,
.cs-grade-tab.is-active,
.cs-daily-tab.is-active {
  border-color: var(--cs-accent);
  background: var(--cs-accent-soft);
}

.cs-lesson-list {
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
  min-height: 0;
  max-height: none;
}

.cs-lesson-item {
  border: 1px solid transparent;
  background: #faf8f4;
  border-radius: 10px;
  padding: 0.38rem 0.45rem;
  text-align: left;
  cursor: pointer;
  color: #0f1623;
}

.cs-lesson-item strong {
  display: block;
  font-size: 0.68rem;
  color: #6b645c;
  font-weight: 600;
}

.cs-lesson-item span,
.cs-lesson-item .learning-kr {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.35;
  color: #0f1623;
}

.cs-lesson-item.is-active {
  border-color: var(--cs-accent);
  background: #fff;
  box-shadow: 0 0 0 1px rgba(199, 62, 58, 0.12);
}

.cs-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.cs-browse-btn {
  display: none;
  color: #0f1623;
}

.cs-browse-btn-icon {
  display: inline-block;
  font-size: 1rem;
  line-height: 1;
}

.cs-browse-btn-text {
  color: inherit;
}

.cs-lesson-card {
  background: var(--cs-surface);
  border: 1px solid var(--cs-line);
  border-radius: 16px;
  padding: 1rem 1.1rem;
}

.cs-lesson-card-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}

.cs-lesson-en {
  margin: 0;
  color: var(--cs-muted);
  font-size: 0.9rem;
}

.cs-lesson-card h2 {
  margin: 0.15rem 0 0.35rem;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
}

.cs-lesson-goal {
  margin: 0;
  color: var(--cs-ink);
  font-size: 0.95rem;
  line-height: 1.45;
}

.cs-lesson-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.2rem;
  font-size: 0.8rem;
  color: var(--cs-muted);
  white-space: nowrap;
}

.cs-progress {
  margin-top: 0.85rem;
  height: 8px;
  border-radius: 999px;
  background: #efe9df;
  overflow: hidden;
}

.cs-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cs-accent), #e07a4f);
  transition: width 0.25s ease;
}

.cs-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.35rem;
}

.cs-step {
  border: 1px solid var(--cs-line);
  background: #fff;
  border-radius: 12px;
  padding: 0.55rem 0.35rem;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--cs-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  min-width: 0;
  overflow: hidden;
}

.cs-step-num {
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: #efe9df;
  color: var(--cs-ink);
  font-size: 0.75rem;
  flex: 0 0 auto;
}

.cs-step-label {
  display: block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.15;
}

.cs-step-label--short {
  display: none;
}

.cs-step.is-active {
  border-color: var(--cs-navy);
  background: var(--cs-navy);
  color: #fff;
}

.cs-step.is-active span,
.cs-step.is-active .cs-step-num {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}

.cs-step.is-done:not(.is-active) {
  border-color: #c8e6d3;
  background: #f1faf4;
  color: #1f6b45;
}

.cs-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.cs-tool {
  border: 1px solid var(--cs-line);
  background: #fff;
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 650;
  color: var(--cs-ink);
}

.cs-tool[aria-pressed="true"] {
  background: var(--cs-accent-soft);
  border-color: #f0b8b5;
}

.cs-tool--primary {
  background: var(--cs-navy);
  border-color: var(--cs-navy);
  color: #fff;
}

.cs-sentence-speed {
  display: grid;
  gap: 0.45rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--cs-line);
  border-radius: 12px;
  background: #faf8f4;
}

.cs-sentence-speed-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--cs-muted);
}

.cs-sentence-speed-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
}

.cs-sentence-speed-btn {
  display: grid;
  gap: 0.08rem;
  margin: 0;
  padding: 0.4rem 0.35rem;
  border: 1px solid #e5e0d8;
  border-radius: 10px;
  background: #fff;
  color: inherit;
  font: inherit;
  text-align: center;
  cursor: pointer;
}

.cs-sentence-speed-btn small {
  font-size: 0.66rem;
  color: var(--cs-muted);
}

.cs-sentence-speed-btn.is-active {
  border-color: var(--cs-accent, #c45c26);
  background: var(--cs-accent-soft, #f8ebe3);
  box-shadow: 0 0 0 1px var(--cs-accent, #c45c26);
}

.cs-sentence-speed-note {
  margin: 0;
  font-size: 0.78rem;
  color: var(--cs-muted);
}

@media (max-width: 640px) {
  .cs-sentence-speed-btns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.cs-stage {
  background: var(--cs-surface);
  border: 1px solid var(--cs-line);
  border-radius: 18px;
  padding: 1.15rem 1.2rem 1.35rem;
  min-height: 280px;
}

.cs-stage-title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.cs-stage-sub {
  margin: 0 0 1rem;
  color: var(--cs-muted);
  font-size: 0.9rem;
}

.cs-hangul-words-wrap {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.cs-hangul-word-list {
  padding-top: 0.85rem;
  border-top: 1px solid var(--cs-line, #e5e0d8);
}

.cs-item-list {
  display: grid;
  gap: 0.55rem;
}

.cs-number-chart {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.cs-number-chart-head .cs-bi-kr {
  margin: 0.15rem 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: #0f1623;
}

.cs-number-chart-scroll {
  overflow-x: auto;
  border: 1px solid var(--cs-line);
  border-radius: 14px;
  background: #fffcf8;
}

.cs-number-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

.cs-number-table th,
.cs-number-table td {
  border-bottom: 1px solid var(--cs-line);
  padding: 0.55rem 0.6rem;
  vertical-align: top;
  text-align: left;
}

.cs-number-table thead th {
  background: #f3eee6;
  position: sticky;
  top: 0;
  z-index: 1;
}

.cs-num-th-en {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cs-muted);
}

.cs-num-th-kr {
  display: block;
  margin-top: 0.12rem;
  font-size: 0.9rem;
  font-weight: 750;
  color: #0f1623;
}

.cs-num-n {
  width: 3.2rem;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--cs-navy);
  text-align: center;
  background: #faf6ef;
}

.cs-num-main,
.cs-num-alt {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
}

.cs-num-alt {
  margin-top: 0.45rem;
  padding-top: 0.4rem;
  border-top: 1px dashed rgba(15, 22, 35, 0.12);
}

.cs-num-play {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--cs-line);
  border-radius: 999px;
  background: #fff;
  color: var(--cs-navy);
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
}

.cs-num-play:hover {
  border-color: var(--cs-accent);
  color: var(--cs-accent);
}

.cs-num-reading {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
  min-width: 0;
}

.cs-num-kr {
  font-size: 1.12rem;
  font-weight: 750;
  line-height: 1.25;
  color: #0f1623;
}

.cs-num-roman {
  font-size: 0.78rem;
  color: var(--cs-muted);
}

.cs-num-en {
  font-size: 0.76rem;
  color: #6b645c;
}

.cs-num-cell--empty {
  color: var(--cs-muted);
}

.cs-num-empty {
  display: inline-block;
  padding: 0.35rem 0.2rem;
}

.cs-number-notes {
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--cs-ink);
}

.cs-number-notes p {
  margin: 0;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  background: #f7f2ea;
}

.cs-number-extra-words {
  margin-top: 0.5rem;
}

.rk-cs-app:not(.is-show-roman) .cs-num-roman {
  display: none;
}

.rk-cs-app.is-hide-meaning .cs-num-en {
  display: none;
}

.cs-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.7rem;
  align-items: center;
  border: 1px solid var(--cs-line);
  border-radius: 14px;
  padding: 0.75rem 0.85rem;
  background: #fffcf8;
}

.cs-item.is-current {
  border-color: var(--cs-accent);
  box-shadow: 0 0 0 2px rgba(199, 62, 58, 0.12);
}

.cs-item-index {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: #efe9df;
  font-size: 0.75rem;
  font-weight: 700;
}

.cs-item-kr {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
}

.cs-item-meta {
  margin: 0.2rem 0 0;
  color: var(--cs-muted);
  font-size: 0.88rem;
}

.rk-cs-app.is-hide-meaning .cs-item-meaning,
.rk-cs-app:not(.is-show-roman) .cs-item-roman {
  display: none !important;
}

.cs-item-actions {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  flex-shrink: 0;
}

.cs-icon-btn {
  border: 1.5px solid var(--cs-line);
  background: #fff;
  border-radius: 50%;
  width: 2.25rem;
  height: 2.25rem;
  min-width: 2.25rem;
  padding: 0;
  cursor: pointer;
  display: inline-grid;
  place-items: center;
  color: var(--cs-accent);
  line-height: 0;
  box-sizing: border-box;
}

.cs-icon-btn svg {
  display: block;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.cs-icon-btn--play:hover,
.cs-icon-btn--play:focus-visible {
  border-color: var(--cs-accent);
  background: var(--cs-accent-soft);
  color: var(--cs-accent);
}

.cs-icon-btn--learn {
  color: var(--cs-muted);
}

.cs-icon-btn.is-on,
.cs-icon-btn--learn.is-on {
  background: #e8f7ee;
  border-color: #9fd5b3;
  color: #1f6b45;
}

.cs-nav-btn .cs-play-icon {
  display: inline-block;
  vertical-align: -0.15em;
  margin-right: 0.35rem;
}

.cs-goal-box,
.cs-speak-box,
.cs-homework-box {
  display: grid;
  gap: 0.85rem;
}

.cs-goal-box h3,
.cs-speak-box h3,
.cs-homework-box h3 {
  margin: 0;
  font-size: 1rem;
}

.cs-speak-header-sub {
  margin: 0.15rem 0 0;
  font-size: 0.88rem;
}

.cs-speak-section {
  display: grid;
  gap: 0.65rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--cs-line, #e5e0d8);
}

.cs-speak-section:first-of-type {
  border-top: none;
  padding-top: 0.25rem;
}

.cs-speak-section--freetalk {
  padding-bottom: 0.25rem;
}

.cs-speak-section-title {
  margin: 0;
  font-size: 1rem;
}

.cs-speak-section-sub {
  margin: 0;
  font-size: 0.84rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-question-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.cs-speak-qlist {
  list-style: none;
  margin: 0.15rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.cs-speak-qitem {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.65rem;
  align-items: start;
  width: 100%;
  margin: 0;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 12px;
  background: #fff;
  color: var(--cs-ink, #0f1623);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.cs-speak-qitem-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  margin-top: 0.1rem;
  border-radius: 999px;
  background: #f3efe8;
  color: var(--cs-muted, #6b645c);
  font-size: 0.75rem;
  font-weight: 700;
}

.cs-speak-qitem-body {
  display: grid;
  gap: 0.2rem;
  min-width: 0;
}

.cs-speak-qitem-tag {
  display: inline-block;
  width: fit-content;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cs-accent, #b42318);
  background: var(--cs-accent-soft, #fde8e7);
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
}

.cs-speak-qitem-kr {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.4;
}

.cs-speak-qitem-en {
  font-size: 0.8rem;
  color: var(--cs-muted, #6b645c);
  line-height: 1.35;
}

.cs-speak-qitem.is-active {
  border-color: var(--cs-accent, #c45c26);
  background: var(--cs-accent-soft, #f8ebe3);
  box-shadow: 0 0 0 1px var(--cs-accent, #c45c26);
}

.cs-speak-qitem.is-active .cs-speak-qitem-num {
  background: var(--cs-accent, #c45c26);
  color: #fff;
}

.cs-speak-now-label {
  margin: 0 0 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--cs-accent, #c45c26);
}

.cs-speak-question-chip {
  display: grid;
  gap: 0.05rem;
  margin: 0;
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 999px;
  background: #fff;
  color: var(--cs-ink, #0f1623);
  font: inherit;
  font-size: 0.78rem;
  text-align: left;
  cursor: pointer;
}

.cs-speak-question-chip-en {
  font-weight: 600;
}

.cs-speak-question-chip-kr {
  font-size: 0.65rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-question-chip.is-active {
  border-color: var(--cs-accent, #c73e3a);
  background: var(--cs-accent-soft, #fde8e7);
}

.cs-dialogue-row--btn {
  display: grid;
  gap: 0.15rem;
  width: 100%;
  margin: 0 0 0.35rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.cs-dialogue-row--btn .cs-dialogue-en {
  font-size: 0.8rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-main-actions--record {
  grid-template-columns: 1fr auto auto;
  align-items: center;
}

.cs-unit-quiz-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem 1rem;
  margin-top: 0.85rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--cs-border, #e5e0d8);
  border-radius: 12px;
  background: linear-gradient(135deg, #f7f4ef 0%, #eef3f8 100%);
}

.cs-unit-quiz-title {
  margin: 0 0 0.25rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--cs-ink, #1f2937);
}

.cs-unit-quiz-sub {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--cs-muted, #6b645c);
  max-width: 36rem;
}

.cs-related-drama-cta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.75rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--cs-border, #e5e0d8);
  border-radius: 12px;
  background: linear-gradient(135deg, #f8f1ef 0%, #f3eef8 100%);
}

.cs-related-drama-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.cs-related-drama-link {
  display: inline-flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 7.5rem;
  padding: 0.55rem 0.75rem;
  border-radius: 10px;
  border: 1px solid rgba(180, 60, 60, 0.25);
  background: #fff;
  color: inherit;
  text-decoration: none;
}

.cs-related-drama-link:hover {
  border-color: #b43c3c;
}

.cs-related-drama-link .learning-kr {
  font-size: 0.88rem;
  font-weight: 700;
  color: #1f2937;
}

.cs-related-drama-link small {
  font-size: 0.72rem;
  color: #6b645c;
}

.cs-speak-box--simple {
  gap: 0.75rem;
}

.cs-speak-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.4rem;
}

.cs-speak-categories {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem;
}

.cs-speak-category {
  display: grid;
  gap: 0.1rem;
  margin: 0;
  padding: 0.55rem 0.5rem;
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 12px;
  background: #faf8f4;
  color: inherit;
  font: inherit;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.cs-speak-category-en {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--cs-ink, #0f1623);
}

.cs-speak-category-kr {
  font-size: 0.68rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-category.is-active {
  border-color: var(--cs-accent, #c45c26);
  background: var(--cs-accent-soft, #f8ebe3);
  box-shadow: 0 0 0 1px var(--cs-accent, #c45c26);
}

.cs-speak-category.is-active .cs-speak-category-en {
  color: var(--cs-accent, #c45c26);
}

.cs-speak-step {
  display: grid;
  gap: 0.08rem;
  margin: 0;
  padding: 0.5rem 0.35rem;
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 12px;
  background: #faf8f4;
  color: inherit;
  font: inherit;
  text-align: center;
  cursor: pointer;
}

.cs-speak-step small {
  font-size: 0.68rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-step-num {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--cs-accent, #c45c26);
}

.cs-speak-step.is-active {
  border-color: var(--cs-accent, #c45c26);
  background: var(--cs-accent-soft, #f8ebe3);
  box-shadow: 0 0 0 1px var(--cs-accent, #c45c26);
}

.cs-speak-step.is-done {
  opacity: 0.8;
}

.cs-speak-step-hint {
  margin: 0;
  padding: 0.45rem 0.65rem;
  border-radius: 10px;
  background: #f3efe8;
  font-size: 0.84rem;
  color: var(--cs-muted, #5c5a56);
  display: grid;
  gap: 0.12rem;
}

.cs-speak-step-hint .cs-bi-en {
  margin: 0;
  color: var(--cs-ink, #0f1623);
  font-weight: 500;
}

.cs-speak-step-hint .cs-bi-kr {
  margin: 0;
  font-size: 0.8rem;
}

.cs-stage-sub--bi {
  display: grid;
  gap: 0.15rem;
}

.cs-stage-sub--bi .cs-bi-en {
  color: var(--cs-ink, #0f1623);
}

.cs-stage-sub--bi .cs-bi-kr {
  font-size: 0.86rem;
  color: var(--cs-muted, #6b645c);
}

.cs-bi-label {
  display: grid;
  gap: 0.04rem;
  line-height: 1.25;
}

.cs-bi-en {
  font-weight: 600;
}

.cs-bi-kr {
  font-size: 0.68rem;
  color: var(--cs-muted, #6b645c);
  font-weight: 400;
}

.cs-speak-main-btn .cs-bi-label {
  text-align: center;
}

.cs-speak-main-btn {
  color: var(--cs-ink, #0f1623);
}

.cs-speak-main-btn .cs-bi-kr {
  color: var(--cs-muted, #6b645c);
}

.cs-speak-main-btn--primary,
.cs-speak-main-btn--record.is-recording {
  color: #fff;
}

.cs-speak-main-btn--primary .cs-bi-en,
.cs-speak-main-btn--primary .cs-bi-kr,
.cs-speak-main-btn--record.is-recording .cs-bi-en,
.cs-speak-main-btn--record.is-recording .cs-bi-kr {
  color: #fff;
}

.cs-speak-tool {
  color: var(--cs-ink, #0f1623);
}

.cs-speak-tool .cs-bi-kr {
  display: block;
  font-size: 0.62rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-rec-indicator {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.75rem;
  border-radius: 12px;
  background: #fde8e7;
  border: 1px solid #e8a8a6;
  color: #8b2e2b;
}

.cs-speak-rec-indicator[hidden] {
  display: none !important;
}

.cs-speak-rec-pulse {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #c73e3a;
  animation: cs-rec-pulse 1.1s ease-in-out infinite;
}

.cs-speak-rec-icon {
  display: flex;
  color: #c73e3a;
}

.cs-speak-rec-text .cs-bi-en {
  color: #8b2e2b;
}

.cs-speak-rec-text .cs-bi-kr {
  color: #a64b48;
}

.cs-preview-kr-label {
  display: block;
  margin: 0.1rem 0 0.45rem;
  font-size: 0.78rem;
  color: var(--cs-muted, #6b645c);
}

@keyframes cs-rec-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.35;
    transform: scale(1.35);
  }
}

.cs-speak-notes {
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 12px;
  padding: 0.5rem 0.75rem;
  background: #faf8f4;
}

.cs-speak-notes summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.88rem;
  list-style: none;
}

.cs-speak-notes summary::-webkit-details-marker {
  display: none;
}

.cs-speak-notes-body {
  display: grid;
  gap: 0.45rem;
  padding-top: 0.55rem;
  font-size: 0.86rem;
}

.cs-speak-view {
  display: grid;
  gap: 0.75rem;
}

.cs-speak-view.is-hide-script .cs-speak-script,
.cs-speak-view.is-hide-script .cs-item-meaning,
.cs-speak-view.is-hide-script .cs-item-roman {
  display: none !important;
}

.cs-speak-scenario-line {
  margin: 0;
  font-size: 0.92rem;
  color: var(--cs-muted, #5c5a56);
  text-align: center;
}

.cs-speak-main-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
}

.cs-speak-main-actions--dual {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cs-speak-main-actions--talk {
  grid-template-columns: repeat(3, auto);
  justify-content: start;
}

.cs-speak-main-btn {
  margin: 0;
  padding: 0.8rem 0.45rem;
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 12px;
  background: #fff;
  color: inherit;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}

.cs-speak-main-btn:hover {
  border-color: var(--cs-accent, #c45c26);
}

.cs-speak-main-btn--primary {
  background: var(--cs-accent, #c45c26);
  color: #fff;
  border-color: var(--cs-accent, #c45c26);
}

.cs-speak-main-btn--primary:hover {
  filter: brightness(1.05);
}

.cs-speak-main-btn--record.is-recording,
#cs-speak-record.is-recording {
  background: #fde8e7;
  border-color: #c73e3a;
  color: #8b2e2b;
}

.cs-speak-line-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.cs-speak-role-badge {
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--cs-accent-soft, #f8ebe3);
  font-size: 0.8rem;
  font-weight: 700;
}

.cs-speak-line-count {
  font-size: 0.82rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-dots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem;
}

.cs-speak-dot {
  width: 11px;
  height: 11px;
  margin: 0;
  padding: 0;
  border: 1px solid #ccc5bb;
  border-radius: 50%;
  background: #ece7df;
  cursor: pointer;
}

.cs-speak-dot.is-current {
  background: var(--cs-accent, #c45c26);
  border-color: var(--cs-accent, #c45c26);
  transform: scale(1.15);
}

.cs-speak-dot.is-heard {
  background: #f0d4a8;
  border-color: #d4a574;
}

.cs-speak-dot.is-done {
  background: #8fbc8f;
  border-color: #6fa86f;
}

.cs-speak-current--hero {
  text-align: center;
  padding: 1.1rem 0.85rem;
}

.cs-speak-current--hero .cs-speak-current-kr {
  font-size: 1.35rem;
  margin: 0 0 0.35rem;
}

.cs-speak-secondary {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
}

.cs-dialogue-script--compact {
  max-height: min(28vh, 220px);
}

.cs-dialogue-row.is-speaking {
  background: var(--cs-accent-soft, #f8ebe3);
  border-radius: 8px;
  box-shadow: inset 0 0 0 1px var(--cs-accent, #c45c26);
}

.cs-dialogue-row.is-speaking .learning-kr {
  font-weight: 600;
}

.cs-speak-main-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

.cs-speak-box--tabs {
  gap: 0.75rem;
}

.cs-speak-header {
  display: grid;
  gap: 0.2rem;
}

.cs-speak-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.4rem;
}

.cs-speak-tab {
  display: grid;
  gap: 0.08rem;
  margin: 0;
  padding: 0.5rem 0.35rem;
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 12px;
  background: #faf8f4;
  color: inherit;
  font: inherit;
  text-align: center;
  cursor: pointer;
}

.cs-speak-tab small {
  font-size: 0.68rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-tab-num {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--cs-accent, #c45c26);
}

.cs-speak-tab.is-active {
  border-color: var(--cs-accent, #c45c26);
  background: var(--cs-accent-soft, #f8ebe3);
  box-shadow: 0 0 0 1px var(--cs-accent, #c45c26);
}

.cs-speak-phases {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.35rem;
}

.cs-speak-phase {
  display: grid;
  gap: 0.05rem;
  margin: 0;
  padding: 0.4rem 0.25rem;
  border: 1px dashed #ddd6cb;
  border-radius: 10px;
  background: #fff;
  color: inherit;
  font: inherit;
  font-size: 0.78rem;
  text-align: center;
  cursor: pointer;
}

.cs-speak-phase-num {
  font-weight: 700;
  color: var(--cs-accent, #c45c26);
}

.cs-speak-phase small {
  font-size: 0.62rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-phase.is-active {
  border-style: solid;
  border-color: var(--cs-accent, #c45c26);
  background: var(--cs-accent-soft, #f8ebe3);
}

.cs-speak-phase.is-done {
  opacity: 0.72;
}

.cs-speak-phase-hint {
  margin: 0;
  padding: 0.45rem 0.65rem;
  border-radius: 10px;
  background: #f3efe8;
  font-size: 0.84rem;
  color: var(--cs-muted, #5c5a56);
}

.cs-speak-panel {
  display: grid;
  gap: 0.75rem;
}

.cs-speak-panel.is-hide-script .cs-speak-script,
.cs-speak-panel.is-hide-script .cs-item-meaning,
.cs-speak-panel.is-hide-script .cs-item-roman {
  display: none !important;
}

.cs-speak-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.cs-speak-toolbar--roleplay {
  gap: 0.4rem;
}

.cs-speak-tool {
  margin: 0;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 999px;
  background: #fff;
  color: var(--cs-ink, #0f1623);
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
}

.cs-speak-tool.is-active,
.cs-speak-tool:hover {
  border-color: var(--cs-accent, #c45c26);
  background: var(--cs-accent-soft, #f8ebe3);
}

.cs-speak-tool:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.cs-speak-line-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-timer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 12px;
  background: #faf8f4;
}

.cs-speak-timer-label {
  font-size: 0.8rem;
  font-weight: 600;
}

.cs-speak-timer-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.cs-speak-timer-display {
  margin-left: auto;
  font-size: 1.15rem;
  font-variant-numeric: tabular-nums;
  color: var(--cs-accent, #c45c26);
}

.cs-speak-role-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.cs-role-card {
  margin: 0;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--cs-line, #e5e0d8);
  border-radius: 12px;
  background: #fff;
}

.cs-role-card h4 {
  margin: 0 0 0.45rem;
  font-size: 0.86rem;
}

.cs-role-card h4 span {
  color: var(--cs-accent, #c45c26);
}

.cs-role-lines {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.35rem;
}

.cs-role-line {
  width: 100%;
  margin: 0;
  padding: 0.35rem 0.45rem;
  border: 1px solid #ece7df;
  border-radius: 8px;
  background: #faf8f4;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.cs-role-line:hover {
  border-color: var(--cs-accent, #c45c26);
}

.cs-dialogue-script {
  display: grid;
  gap: 0.35rem;
  max-height: min(32vh, 280px);
  overflow: auto;
}

.cs-dialogue-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.5rem;
  align-items: start;
  padding: 0.35rem 0.45rem;
  border-radius: 8px;
}

.cs-dialogue-row.is-current {
  background: var(--cs-accent-soft, #f8ebe3);
}

.cs-dialogue-row .cs-item-meaning {
  grid-column: 2;
  font-size: 0.78rem;
}

.cs-speak-flow,
.cs-speak-ideas ul {
  margin: 0.35rem 0 0;
  padding-left: 1.1rem;
}

.cs-speak-flow li,
.cs-speak-ideas li {
  margin: 0.25rem 0;
  font-size: 0.88rem;
}

.cs-speak-subtip {
  margin: 0.35rem 0 0;
  font-size: 0.78rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-phrase small {
  display: block;
  font-size: 0.65rem;
  color: var(--cs-muted, #6b645c);
}

@media (max-width: 720px) {
  .cs-speak-phases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cs-speak-role-cards {
    grid-template-columns: 1fr;
  }
}

.cs-speak-box--record .cs-speak-lines {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  max-height: min(28vh, 220px);
  overflow: auto;
  padding: 0.15rem 0.1rem 0.35rem;
}

.cs-speak-group-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.4rem;
}

.cs-speak-group-tab {
  display: grid;
  gap: 0.1rem;
  margin: 0;
  padding: 0.45rem 0.4rem;
  border: 1px solid #e5e0d8;
  border-radius: 10px;
  background: #faf8f4;
  color: inherit;
  font: inherit;
  text-align: center;
  cursor: pointer;
}

.cs-speak-group-tab small {
  font-size: 0.68rem;
  color: var(--cs-muted, #6b645c);
}

.cs-speak-group-tab.is-active {
  border-color: var(--cs-accent, #c45c26);
  background: var(--cs-accent-soft, #f8ebe3);
  box-shadow: 0 0 0 1px var(--cs-accent, #c45c26);
}

.cs-speak-group-tab:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

@media (max-width: 640px) {
  .cs-speak-group-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.cs-speak-line {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  max-width: 100%;
  margin: 0;
  padding: 0.35rem 0.55rem;
  border: 1px solid #e5e0d8;
  border-radius: 10px;
  background: #faf8f4;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.cs-speak-line:hover {
  border-color: #c9bfb0;
  background: #fff;
}

.cs-speak-line.is-current {
  border-color: var(--cs-accent, #c45c26);
  background: var(--cs-accent-soft, #f8ebe3);
  box-shadow: 0 0 0 1px var(--cs-accent, #c45c26);
}

.cs-speak-line-i {
  flex: 0 0 auto;
  min-width: 1.15rem;
  padding: 0.05rem 0.28rem;
  border-radius: 6px;
  background: #ebe6df;
  color: var(--cs-muted, #6b645c);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
}

.cs-speak-line.is-current .cs-speak-line-i {
  background: var(--cs-accent, #c45c26);
  color: #fff;
}

.cs-speak-line-tag {
  flex: 0 0 auto;
  min-width: 1.15rem;
  padding: 0.05rem 0.28rem;
  border-radius: 6px;
  background: #ebe6df;
  color: var(--cs-muted, #6b645c);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
}

.cs-speak-line.is-current .cs-speak-line-tag {
  background: var(--cs-accent, #c45c26);
  color: #fff;
}

.cs-speak-line .learning-kr {
  font-size: 0.95rem;
  line-height: 1.35;
}

.cs-speak-current-kr {
  margin: 0.35rem 0 0.15rem;
  font-size: clamp(1.35rem, 3.5vw, 1.85rem);
  line-height: 1.4;
}

.cs-speak-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.cs-speak-record-btn.is-recording,
#cs-speak-record.is-recording {
  background: #b42318 !important;
  border-color: #b42318 !important;
  color: #fff !important;
}

.cs-speak-status {
  margin: 0;
  font-size: 0.88rem;
  color: var(--cs-muted, #6b645c);
  display: grid;
  gap: 0.1rem;
}

.cs-speak-audio {
  width: 100%;
  max-width: 420px;
}

.cs-item-list--full {
  max-height: min(58vh, 520px);
  overflow: auto;
  padding-right: 0.15rem;
}

.cs-speak-scenario p {
  margin: 0.35rem 0 0;
}

.cs-speak-grammar {
  margin: 0.65rem 0;
  padding: 0.55rem 0.75rem;
  border-radius: 10px;
  background: var(--cs-accent-soft, #fde8e7);
  font-size: 0.88rem;
}

.cs-speak-grammar strong {
  margin-right: 0.35rem;
}

.cs-speak-opener .learning-kr {
  font-size: 1.15rem;
  margin: 0.35rem 0 0.15rem;
}

.cs-speak-keyphrases {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.75rem 0;
}

.cs-speak-phrase {
  margin: 0;
  border: 1px solid var(--cs-line, #e5e0d8);
  background: #fff;
  color: var(--cs-ink, #0f1623);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
  font: inherit;
  font-size: 0.82rem;
  line-height: 1.35;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.cs-speak-phrase .learning-kr {
  color: inherit;
}

.cs-speak-phrase:hover {
  border-color: var(--cs-accent);
  background: var(--cs-accent-soft, #fde8e7);
}

.cs-speak-steps {
  margin: 0.75rem 0 1rem;
  padding-left: 1.15rem;
  color: var(--cs-muted);
  font-size: 0.86rem;
}

.cs-speak-steps li {
  margin: 0.2rem 0;
}

.cs-goal-box ul {
  margin: 0;
  padding-left: 1.1rem;
}

.cs-goal-box li {
  margin: 0.25rem 0;
}

.cs-preview-wrap {
  display: grid;
  gap: 1rem;
  margin-top: 0.35rem;
}

.cs-preview-block {
  display: grid;
  gap: 0.55rem;
}

.cs-preview-title {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 700;
}

.cs-preview-title span {
  font-weight: 600;
  color: var(--cs-muted);
}

.cs-item-list--preview {
  max-height: min(42vh, 360px);
  overflow: auto;
  padding-right: 0.15rem;
}

.cs-lesson-part {
  margin: 0.55rem 0 0.25rem;
  padding: 0.2rem 0.15rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--cs-muted);
}

.culture-type-badge {
  display: inline-block;
  margin-bottom: 0.35rem;
  padding: 0.15rem 0.5rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--cs-accent);
  background: var(--cs-accent-soft);
  border-radius: 999px;
}

.cs-prompt-card {
  border-radius: 16px;
  border: 1px dashed #d9cfc0;
  background: #fff8f0;
  padding: 1rem;
}

.cs-prompt-card p {
  margin: 0.35rem 0 0;
}

.cs-prompt-card .learning-kr {
  font-size: 1.35rem;
  font-weight: 700;
}

.cs-homework-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cs-nav-footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.6rem;
  align-items: center;
}

#cs-prev-btn,
#cs-next-btn,
.rk-cs-app .cs-nav-btn {
  border: 1px solid var(--cs-accent) !important;
  background: var(--cs-accent) !important;
  color: #fff !important;
  border-radius: 12px !important;
  padding: 0.7rem 1.1rem !important;
  font-weight: 700 !important;
  font-size: 0.9rem !important;
  line-height: 1.2 !important;
  cursor: pointer;
  width: auto !important;
  max-width: max-content;
  min-width: 7.5rem !important;
  height: auto !important;
  justify-self: start;
  text-align: center;
  box-sizing: border-box;
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

#cs-prev-btn:hover,
#cs-next-btn:hover,
.rk-cs-app .cs-nav-btn:hover,
.rk-cs-app .cs-nav-btn:focus-visible {
  filter: brightness(0.95);
  color: #fff !important;
}

#cs-prev-btn:disabled,
.rk-cs-app .cs-nav-btn:disabled {
  opacity: 0.45 !important;
  cursor: not-allowed;
  filter: none;
}

#cs-next-btn,
.rk-cs-app .cs-nav-btn--primary {
  justify-self: end;
}

.cs-nav-status {
  margin: 0;
  text-align: center;
  color: var(--cs-muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.cs-teacher-panel {
  background: #fff;
  border: 1px solid var(--cs-line);
  border-radius: 14px;
  padding: 0.9rem 1rem;
  display: grid;
  gap: 0.45rem;
}

.cs-teacher-panel h3 {
  margin: 0 0 0.2rem;
  font-size: 0.92rem;
}

.cs-teacher-panel label {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.88rem;
  line-height: 1.35;
  color: var(--cs-ink);
  min-height: 1.5rem;
}

.cs-teacher-panel label input[type="checkbox"] {
  width: 1.05rem;
  height: 1.05rem;
  margin: 0;
  flex-shrink: 0;
  align-self: center;
  vertical-align: middle;
  accent-color: var(--cs-accent);
}

.cs-teacher-note {
  flex-direction: column;
  align-items: stretch;
  margin-top: 0.25rem;
  gap: 0.35rem;
}

.cs-teacher-note textarea {
  width: 100%;
  border: 1px solid var(--cs-line);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
  font: inherit;
  resize: vertical;
}

/* Class mode: board-friendly */
.rk-cs-app[data-mode="class"].is-board .cs-item-kr {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
}

.rk-cs-app[data-mode="class"].is-board .cs-stage {
  padding: 1.5rem;
  min-height: 360px;
}

@media (max-width: 900px) {
  .cs-shell {
    grid-template-columns: 1fr;
  }

  .cs-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(88vw, 300px);
    z-index: 40;
    background: var(--cs-bg);
    padding: 1rem;
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    max-height: none;
    overflow: auto;
    box-shadow: 8px 0 24px rgba(15, 22, 35, 0.12);
  }

  .rk-cs-app.is-browse-open .cs-sidebar {
    transform: translateX(0);
  }

  .cs-browse-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 22, 35, 0.35);
    z-index: 35;
  }

  .cs-browse-btn {
    display: inline-flex !important;
    align-items: center;
    gap: 0.45rem;
    border: 1px solid #d9d2c8 !important;
    background: #fff !important;
    border-radius: 999px !important;
    padding: 0.5rem 0.95rem !important;
    font-weight: 750 !important;
    font-size: 0.88rem !important;
    line-height: 1.2 !important;
    cursor: pointer;
    width: fit-content;
    max-width: 100%;
    color: #0f1623 !important;
    -webkit-text-fill-color: #0f1623 !important;
    box-shadow: 0 1px 2px rgba(15, 22, 35, 0.06);
  }

  .cs-browse-btn-icon,
  .cs-browse-btn-text {
    color: #0f1623 !important;
    -webkit-text-fill-color: #0f1623 !important;
  }

  .cs-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.28rem;
  }

  .cs-step {
    font-size: 0.58rem !important;
    font-weight: 700 !important;
    padding: 0.38rem 0.08rem !important;
    gap: 0.15rem;
    min-width: 0 !important;
    width: 100%;
    box-sizing: border-box;
    color: #5c564e !important;
    -webkit-text-fill-color: #5c564e !important;
  }

  .cs-step.is-active {
    color: #fff !important;
    -webkit-text-fill-color: #fff !important;
  }

  .cs-step-num {
    width: 1.15rem;
    height: 1.15rem;
    font-size: 0.62rem;
  }

  .cs-step-label--full {
    display: none !important;
  }

  .cs-step-label--short {
    display: block !important;
    font-size: 0.58rem !important;
    letter-spacing: -0.01em;
  }

  .cs-tool {
    font-size: 0.75rem !important;
    padding: 0.38rem 0.7rem !important;
  }

  .cs-lesson-card h2 {
    font-size: clamp(1.15rem, 5vw, 1.45rem);
  }

  .cs-lesson-goal {
    font-size: 0.88rem;
  }

  .cs-stage-title {
    font-size: 0.98rem;
  }

  .cs-stage-sub {
    font-size: 0.82rem;
  }

  .cs-stage-sub--bi .cs-bi-en {
    font-size: 0.86rem;
    font-weight: 600;
    line-height: 1.35;
  }

  .cs-stage-sub--bi .cs-bi-kr {
    font-size: 0.78rem;
  }

  .cs-item-kr {
    font-size: 1.05rem;
  }

  .cs-goal-box ul {
    font-size: 0.88rem;
  }

  .cs-lesson-card-top {
    flex-direction: column;
  }

  .cs-lesson-meta {
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .cs-mode-btn {
    min-width: 0;
  }

  .cs-nav-footer {
    grid-template-columns: 1fr 1fr;
  }

  .cs-nav-status {
    grid-column: 1 / -1;
    order: -1;
  }

  .cs-nav-btn,
  .cs-nav-btn--primary,
  #cs-prev-btn,
  #cs-next-btn {
    justify-self: stretch;
    min-width: 0 !important;
    max-width: none;
    width: 100% !important;
  }
}