.lesson-steps .step {
  border: 0;
  cursor: pointer;
  transition: transform 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.lesson-steps .step:hover {
  color: var(--sea-dark);
  background: var(--foam);
  transform: translateY(-1px);
}

.lesson-steps .step.active,
.lesson-steps .step.active:hover {
  color: #fff;
  background: var(--sea-dark);
}

.lesson-steps .step:focus-visible,
.learning-track button:focus-visible {
  outline: 3px solid rgba(240, 110, 91, 0.3);
  outline-offset: 2px;
}

.learning-track {
  grid-column: 1 / -1;
  width: 100%;
  min-width: 0;
  padding: 30px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 95% -30%, rgba(143, 179, 93, 0.16), transparent 34%),
    linear-gradient(180deg, #fbfdfb 0%, #f4faf7 100%);
}

.track-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.track-kicker {
  display: block;
  color: var(--sea);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.track-head h3 {
  margin: 3px 0 0;
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: 25px;
  letter-spacing: -0.03em;
}

.track-status {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sync-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 30px;
  padding: 0 11px;
  border: 1px solid #d8e5e3;
  border-radius: 999px;
  color: var(--muted);
  background: #fff;
  font-size: 11px;
  font-weight: 850;
}

.sync-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #a8b7b5;
}

.sync-status[data-state="loading"]::before {
  background: var(--sun);
  animation: syncPulse 1s ease-in-out infinite;
}

.sync-status[data-state="playing"] {
  color: var(--sea-dark);
  border-color: #a9d8d2;
  background: var(--foam);
}

.sync-status[data-state="playing"]::before { background: var(--sea); }
.sync-status[data-state="paused"]::before { background: var(--coral); }
.sync-status[data-state="simulation"]::before { background: var(--leaf); }

.track-clock {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.track-clock strong { color: var(--ink); font-size: 18px; }
.track-clock i { opacity: 0.45; font-style: normal; }

.track-progress {
  height: 7px;
  margin-top: 20px;
  overflow: hidden;
  border-radius: 999px;
  background: #dce8e5;
}

.track-progress span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--sea), #32aaa2 72%, var(--coral));
  transition: width 0.24s linear;
}

.cue-rail {
  display: flex;
  max-width: 100%;
  min-width: 0;
  gap: 8px;
  margin: 18px -4px 0;
  padding: 4px;
  overflow-x: auto;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}

.cue-chip {
  flex: 0 0 auto;
  min-width: 104px;
  min-height: 48px;
  padding: 7px 10px;
  border: 1px solid #d6e4e2;
  border-radius: 12px;
  color: #587176;
  background: rgba(255, 255, 255, 0.86);
  cursor: pointer;
  scroll-snap-align: center;
  text-align: left;
  transition: transform 0.2s ease, border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.cue-chip span,
.cue-chip small { display: block; }
.cue-chip span { font-size: 12px; font-weight: 850; }
.cue-chip small { margin-top: 1px; color: var(--muted); font-size: 9px; font-variant-numeric: tabular-nums; }
.cue-chip.passed { border-color: #bed9d5; color: var(--sea-dark); background: #eef9f6; }

.cue-chip.active {
  color: #fff;
  border-color: var(--sea-dark);
  background: var(--sea-dark);
  box-shadow: 0 8px 18px rgba(7, 91, 99, 0.18);
  transform: translateY(-2px);
}

.cue-chip.active small { color: rgba(255, 255, 255, 0.72); }

.cue-window {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.3fr) minmax(0, 0.85fr);
  gap: 12px;
  margin-top: 15px;
}

.cue-card {
  min-width: 0;
  min-height: 116px;
  padding: 17px 18px;
  overflow: hidden;
  border: 1px solid #d8e5e3;
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.76);
  opacity: 0.62;
}

.cue-card.current {
  position: relative;
  border-color: #9fcfc9;
  background: #fff;
  box-shadow: 0 15px 32px rgba(18, 50, 58, 0.1);
  opacity: 1;
  animation: cueArrive 0.34s ease both;
}

.cue-card.current::after {
  content: "";
  position: absolute;
  width: 74px;
  height: 74px;
  right: -30px;
  top: -30px;
  border: 18px solid rgba(8, 127, 134, 0.07);
  border-radius: 50%;
}

.cue-card.empty {
  display: grid;
  place-items: center;
  color: #91a4a2;
  border-style: dashed;
  font-size: 11px;
}

.cue-position {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.cue-word {
  display: block;
  margin-top: 5px;
  color: var(--sea-dark);
  font-family: Georgia, serif;
  font-size: 23px;
  line-height: 1.1;
}

.cue-card.current .cue-word { font-size: 31px; }
.cue-ipa { display: block; margin-top: 3px; color: var(--muted); font-size: 10px; }
.cue-meaning { margin: 7px 0 0; color: #49676c; font-size: 11px; }

.lyrics-follow {
  margin-top: 14px;
  overflow: hidden;
  border: 1px solid #d7e5e2;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 12px 30px rgba(18, 50, 58, 0.06);
}

.lyrics-follow-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 17px 20px 14px;
  border-bottom: 1px solid #e0ebe9;
  background: linear-gradient(90deg, rgba(233, 248, 244, 0.82), rgba(255, 255, 255, 0.76));
}

.lyrics-follow-head h3 {
  margin: 3px 0 0;
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.lyrics-status {
  display: inline-flex;
  align-items: center;
  min-height: 29px;
  padding: 0 10px;
  border: 1px solid #d7e4e2;
  border-radius: 999px;
  color: #74898c;
  background: #fff;
  font-size: 10px;
  font-weight: 850;
  white-space: nowrap;
}

.lyrics-status[data-state="ready"] {
  color: var(--sea-dark);
  border-color: #afd7d2;
  background: var(--foam);
}

.lyrics-lines {
  min-height: 205px;
  max-height: 325px;
  padding: 24px clamp(16px, 3vw, 38px);
  overflow-y: auto;
  scroll-behavior: auto;
  scrollbar-color: #b8d5d1 transparent;
  scrollbar-width: thin;
  background:
    radial-gradient(circle at 95% 10%, rgba(8, 127, 134, 0.05), transparent 28%),
    #fff;
}

.lyric-line {
  position: relative;
  display: block;
  width: 100%;
  min-height: 34px;
  margin: 0;
  padding: 7px 76px 7px 14px;
  border: 0;
  border-left: 3px solid transparent;
  border-radius: 0 10px 10px 0;
  color: #7a8e91;
  background: transparent;
  font: inherit;
  font-size: 14px;
  line-height: 1.45;
  text-align: left;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: normal;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

button.lyric-line { cursor: pointer; }
button.lyric-line:hover { color: var(--sea-dark); background: #f3faf8; }
.lyric-line.passed { opacity: 0.5; }

.lyric-line.timed {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 9px;
  align-items: baseline;
  padding-left: 10px;
}

.lyric-time {
  color: #9aabad;
  font-size: 10px;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.lyric-text {
  min-width: 0;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: normal;
}
.lyric-line.active .lyric-time { color: var(--coral); }

.lyric-line.active {
  color: var(--sea-dark);
  border-left-color: var(--coral);
  background: linear-gradient(90deg, rgba(229, 247, 243, 0.96), rgba(248, 252, 251, 0.68));
  box-shadow: 0 8px 20px rgba(7, 91, 99, 0.07);
  font-size: 16px;
  font-weight: 800;
  opacity: 1;
  transform: translateX(4px);
}

.lyric-line.active[data-active-word]::after {
  content: attr(data-active-word);
  position: absolute;
  top: 50%;
  right: 12px;
  padding: 3px 7px;
  border-radius: 999px;
  color: #fff;
  background: var(--sea-dark);
  font-size: 9px;
  font-weight: 900;
  line-height: 1.2;
  text-transform: lowercase;
  transform: translateY(-50%);
}

.lyric-spacer { height: 10px; }

.lyrics-empty {
  display: grid;
  min-height: 155px;
  place-items: center;
  padding: 28px;
  color: #829496;
  text-align: center;
}

.lyrics-empty strong {
  display: block;
  margin-bottom: 6px;
  color: #4f696d;
  font-size: 15px;
}

.lyrics-empty span { font-size: 11px; }

.mode-panel {
  min-height: 160px;
  margin-top: 14px;
  padding: 22px;
  border: 1px solid #d7e5e2;
  border-radius: 18px;
  background: #fff;
}

.mode-panel-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
}

.mode-label {
  display: block;
  color: var(--coral);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.mode-panel h4 {
  margin: 4px 0 0;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.mode-panel p { margin: 8px 0 0; color: var(--muted); font-size: 12px; }

.mode-word {
  margin-top: 12px;
  color: var(--sea-dark);
  font-family: Georgia, serif;
  font-size: 32px;
  font-weight: 700;
}

.mode-word .ipa { margin-left: 8px; color: var(--muted); font-family: inherit; font-size: 12px; font-weight: 400; }
.mode-meaning { margin-top: 4px; color: #3f5d62; font-size: 13px; }

.find-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 17px;
}

.find-option,
.memory-action,
.mode-action {
  min-height: 44px;
  padding: 9px 13px;
  border: 1px solid #cadeda;
  border-radius: 11px;
  color: var(--sea-dark);
  background: #f8fbf9;
  cursor: pointer;
  font-weight: 820;
}

.find-option:hover,
.memory-action:hover,
.mode-action:hover { border-color: var(--sea); background: var(--foam); }
.find-option.correct { color: #fff; border-color: var(--sea); background: var(--sea); }
.find-option.wrong { color: #fff; border-color: var(--coral); background: var(--coral); }
.find-option:disabled { cursor: default; opacity: 0.76; }

.answer-feedback {
  min-height: 20px;
  margin-top: 10px;
  color: var(--sea-dark);
  font-size: 11px;
  font-weight: 750;
}

.memory-card {
  position: relative;
  min-height: 126px;
  margin-top: 14px;
  padding: 20px;
  border-radius: 15px;
  color: #fff;
  background: linear-gradient(135deg, var(--sea-dark), #0d7a80);
  box-shadow: 0 12px 24px rgba(7, 91, 99, 0.16);
}

.memory-card .mode-word { margin-top: 0; color: #fff; }
.memory-card .mode-word .ipa { color: rgba(255, 255, 255, 0.66); }
.memory-card .memory-answer { margin-top: 9px; color: rgba(255, 255, 255, 0.88); font-size: 13px; }
.memory-card.is-hidden .memory-answer { filter: blur(7px); user-select: none; }
.memory-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 13px; }
.memory-action.primary { color: #fff; border-color: var(--sea); background: var(--sea); }
.memory-action.unknown { color: #9b3e32; border-color: #f0c0b9; background: #fff5f2; }
.memory-rating { align-self: center; color: var(--muted); font-size: 11px; font-weight: 750; }

.replay-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  margin-top: 13px;
}

.replay-time {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--sea-dark);
  font-size: 30px;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.replay-time span { color: var(--muted); font-size: 11px; font-weight: 700; }
.replay-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }

.track-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 15px;
  flex-wrap: wrap;
}

.track-control {
  min-height: 40px;
  padding: 0 13px;
  border: 1px solid #cadeda;
  border-radius: 10px;
  color: #48656a;
  background: #fff;
  cursor: pointer;
  font-size: 11px;
  font-weight: 800;
}

.track-control:hover { color: var(--sea-dark); border-color: var(--sea); }
.track-control-primary { color: #fff; border-color: var(--sea-dark); background: var(--sea-dark); }
.track-control-primary:hover { color: #fff; background: var(--sea); }

.rate-control {
  display: inline-flex;
  gap: 4px;
  margin-left: auto;
  padding: 4px;
  border: 1px solid #d3e2df;
  border-radius: 10px;
  background: #fff;
}

.rate-control button {
  min-height: 31px;
  padding: 0 10px;
  border: 0;
  border-radius: 7px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 10px;
  font-weight: 850;
}

.rate-control button.active { color: #fff; background: var(--sea-dark); }

.track-note {
  margin: 12px 0 0;
  color: #778c8f;
  font-size: 10px;
}

.embed-notice-actions button {
  min-height: 44px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: var(--coral);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.embed-notice-actions button:hover { background: #dc5c4a; }

@keyframes cueArrive {
  from { transform: translateY(8px); opacity: 0.55; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes syncPulse {
  0%, 100% { transform: scale(0.85); opacity: 0.55; }
  50% { transform: scale(1.2); opacity: 1; }
}

@media (max-width: 760px) {
  .learning-track { padding: 23px 18px; }
  .track-head { align-items: flex-start; flex-direction: column; gap: 10px; }
  .track-status { width: 100%; justify-content: space-between; }
  .cue-window { grid-template-columns: minmax(0, 1fr); }
  .cue-card,
  .cue-card.empty { display: none; min-height: 106px; }
  .cue-card.current { display: block; }
  .lyrics-follow-head { align-items: flex-start; padding: 15px 16px 13px; }
  .lyrics-lines { min-height: 185px; max-height: 270px; padding: 18px 12px; }
  .lyric-line { padding-right: 66px; font-size: 13px; }
  .lyric-line.timed { grid-template-columns: 43px minmax(0, 1fr); gap: 7px; padding-left: 8px; }
  .lyric-time { font-size: 9px; }
  .lyric-line.active { font-size: 15px; transform: none; }
  .find-options { grid-template-columns: 1fr; }
  .replay-layout { grid-template-columns: 1fr; }
  .replay-actions { justify-content: flex-start; }
  .rate-control { width: 100%; margin-left: 0; }
  .rate-control button { flex: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .sync-status[data-state="loading"]::before,
  .cue-card.current { animation: none; }
  .track-progress span,
  .cue-chip { transition: none; }
}