/* Language learning tools · 字音 */

.learn-layout {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: var(--space-10);
  align-items: start;
}

.learn-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  position: sticky;
  top: var(--space-6);
}

.learn-nav__link {
  appearance: none;
  border: 0;
  background: transparent;
  text-align: left;
  padding: var(--space-2) 0;
  color: var(--color-ink-muted);
  font-family: var(--font-serif);
  font-size: var(--text-base);
  cursor: pointer;
}

.learn-nav__link:hover {
  color: var(--color-ink);
}

.learn-nav__link[aria-current="true"] {
  color: var(--color-accent);
}

.learn-tool {
  display: none;
}

.learn-tool[aria-hidden="false"] {
  display: block;
}

.learn-access-note {
  margin: var(--space-3) 0 0;
  max-width: 42rem;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.learn-audience {
  margin: 0 0 var(--space-4);
  max-width: 40rem;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.ziyin-audio-note {
  margin: 0 0 var(--space-6);
  max-width: 40rem;
  color: var(--color-ink);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  padding: var(--space-3) 0 0;
  border-top: 1px solid color-mix(in srgb, var(--color-ink) 12%, transparent);
}

.ziyin-syllabus {
  max-width: 44rem;
  margin: 0 0 var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.ziyin-syllabus__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 600;
}

.ziyin-syllabus__lead,
.ziyin-syllabus__total {
  margin: 0 0 var(--space-3);
  max-width: 40rem;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.ziyin-syllabus__total {
  color: var(--color-ink);
  font-weight: 600;
}

.ziyin-syllabus__list {
  display: grid;
  gap: var(--space-4);
}

.ziyin-syllabus__item {
  padding: var(--space-4) 0 0;
  border-top: 1px solid var(--color-border);
}

.ziyin-syllabus__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.ziyin-syllabus__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-3);
  margin: 0 0 var(--space-2);
}

.ziyin-syllabus__level {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
}

.ziyin-syllabus__count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-accent);
}

.ziyin-syllabus__desc {
  margin: 0 0 var(--space-2);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.ziyin-syllabus__words {
  margin: var(--space-2) 0 0;
  font-family: var(--font-serif);
  font-size: var(--text-base);
  line-height: 1.7;
  letter-spacing: 0.08em;
  word-break: break-all;
  color: var(--color-ink);
}

.ziyin-syllabus__note {
  margin: var(--space-2) 0 0;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.ziyin-syllabus details summary {
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-accent);
  list-style: none;
}

.ziyin-syllabus details summary::-webkit-details-marker {
  display: none;
}

.learn-primer__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 600;
}

.learn-primer {
  max-width: 44rem;
  margin-bottom: var(--space-6);
}

.learn-primer--ipa {
  max-width: 52rem;
}

.learn-primer h4 {
  margin: var(--space-5) 0 var(--space-2);
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
}

.learn-primer h5 {
  margin: var(--space-4) 0 var(--space-2);
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
}

.learn-primer p {
  margin: 0;
  color: var(--color-ink-muted);
  line-height: var(--leading-relaxed);
}

.learn-primer p + p,
.learn-primer p + .learn-primer__list,
.learn-primer p + .learn-primer__table,
.learn-primer p + .learn-primer__table-wrap,
.learn-primer p + .learn-primer__examples,
.learn-primer p + .learn-primer__levels {
  margin-top: var(--space-2);
}

.learn-primer__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--space-3) 0 0;
}

.learn-primer__table-wrap .learn-primer__table {
  margin-top: 0;
  min-width: 36rem;
}

.learn-primer__list {
  margin: var(--space-2) 0 0;
  padding-left: 1.2rem;
  color: var(--color-ink-muted);
  line-height: var(--leading-relaxed);
}

.learn-primer__list li + li {
  margin-top: var(--space-1);
}

.learn-primer code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--color-accent);
}

.learn-primer__table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
}

.learn-primer__table th,
.learn-primer__table td {
  text-align: left;
  padding: var(--space-2) var(--space-3) var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  color: var(--color-ink-muted);
  line-height: var(--leading-relaxed);
}

.learn-primer__table th {
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.learn-primer__table-row--focus td {
  color: var(--color-accent);
}

.learn-primer__dict-jump {
  margin: var(--space-3) 0 0;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  align-items: center;
}

.learn-primer__dict-jump--top {
  margin: 0 0 var(--space-3);
  padding: var(--space-3) 0 0;
  border-bottom: none;
}

.learn-primer__listen-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  align-items: center;
  margin: 0 0 var(--space-5);
  padding: 0 0 var(--space-4);
  border-bottom: 1px solid var(--color-border);
  max-width: 52rem;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.learn-primer__listen-label {
  flex: 1 0 100%;
  color: var(--color-ink);
  font-weight: 600;
}

.learn-primer__listen-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.learn-primer__listen-btn {
  min-height: 1.75rem;
  padding: 0.15rem 0.55rem;
  font-size: var(--text-xs);
}

.learn-primer__dict-link {
  font-weight: 600;
}

.learn-primer__examples {
  margin: var(--space-3) 0 0;
  display: grid;
  gap: var(--space-4);
}

.learn-primer__examples dt {
  margin: 0 0 var(--space-1);
  font-family: var(--font-serif);
  color: var(--color-ink);
}

.learn-primer__examples dd {
  margin: 0;
  color: var(--color-ink-muted);
  line-height: var(--leading-relaxed);
}

.learn-primer__levels {
  margin: var(--space-2) 0 0;
  padding-left: 1.2rem;
  color: var(--color-ink-muted);
  line-height: var(--leading-relaxed);
}

.learn-primer__levels li + li {
  margin-top: var(--space-2);
}

.learn-primer__levels strong {
  color: var(--color-ink);
  font-weight: 600;
}

.ziyin-levels {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-5);
}

.ziyin-level {
  appearance: none;
  min-width: 2.25rem;
  height: 2.25rem;
  padding: 0 var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  cursor: pointer;
}

.ziyin-level:hover {
  color: var(--color-ink);
  border-color: var(--color-ink-muted);
}

.ziyin-level[aria-pressed="true"] {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.ziyin-level-name {
  margin-left: var(--space-2);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.ziyin-stage {
  max-width: 34rem;
}

.ziyin-card {
  padding: var(--space-8) 0 var(--space-6);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.ziyin-han {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(4.5rem, 12vw, 6.5rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.04em;
}

.ziyin-tag {
  display: inline-block;
  margin: var(--space-3) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.ziyin-rows {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
}

.ziyin-row {
  display: grid;
  grid-template-columns: 4.75rem minmax(0, 1fr);
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-paper-raised);
}

.ziyin-row__main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.ziyin-listen {
  appearance: none;
  flex: 0 0 auto;
  border: 1px solid var(--color-border-strong);
  background: transparent;
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.ziyin-listen:hover:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.ziyin-listen:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.ziyin-listen--primary {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.ziyin-listen--primary:hover:not(:disabled) {
  background: var(--color-accent);
  color: #fff7f2;
}

.ziyin-speaker {
  margin: var(--space-4) 0 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.ziyin-audio-status {
  margin: var(--space-4) 0 0;
  max-width: 36rem;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.5;
}

.ziyin-row__label {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-ink);
}

.ziyin-row__value {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(1.35rem, 3.5vw, 1.75rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-ink);
}

.ziyin-row__value--ipa {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 3.2vw, 1.55rem);
  font-weight: 500;
  letter-spacing: 0.02em;
  word-break: break-word;
  color: var(--color-ink);
}

.ziyin-row--focus {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
  border-left-width: 3px;
}

.ziyin-row--focus .ziyin-row__label,
.ziyin-row__value--focus {
  color: var(--color-accent);
  font-weight: 700;
}

.ziyin-source {
  margin: var(--space-2) 0 0;
  max-width: 36rem;
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  line-height: var(--leading-relaxed);
}

.ziyin-gloss {
  margin: var(--space-5) 0 0;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.ziyin-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.ziyin-status {
  margin: var(--space-4) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.ziyin-note,
.ziyin-legend {
  margin: var(--space-6) 0 0;
  max-width: 36rem;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.ziyin-legend {
  margin-top: var(--space-3);
}

.ziyin-mode-note {
  margin: 0 0 var(--space-5);
  max-width: 36rem;
  color: var(--color-ink);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.ziyin-flash {
  perspective: 1200px;
  max-width: 22rem;
}

.ziyin-flash__card {
  position: relative;
  width: 100%;
  min-height: 18rem;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
  outline: none;
}

.ziyin-flash__card:focus-visible {
  box-shadow: 0 0 0 2px var(--color-accent);
  border-radius: var(--radius-md, 0.75rem);
}

.ziyin-flash__inner {
  position: relative;
  width: 100%;
  min-height: 18rem;
  transform-style: preserve-3d;
  transition: transform 0.55s ease;
}

.ziyin-flash__card.is-flipped .ziyin-flash__inner {
  transform: rotateY(180deg);
}

.ziyin-flash__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-8) var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 0.75rem);
  background: var(--color-paper-raised);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.ziyin-flash__face--front {
  background:
    linear-gradient(160deg, color-mix(in srgb, var(--color-accent-soft) 55%, transparent), transparent 55%),
    var(--color-paper-raised);
}

.ziyin-flash__face--back {
  transform: rotateY(180deg);
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent-soft) 35%, var(--color-paper-raised));
}

.ziyin-flash__han {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(4.25rem, 14vw, 5.75rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--color-ink);
}

.ziyin-flash__han--small {
  font-size: clamp(2.25rem, 8vw, 3rem);
}

.ziyin-flash__pinyin {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(1.5rem, 4vw, 1.85rem);
  font-weight: 600;
  color: var(--color-ink);
}

.ziyin-flash__ipa {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

.ziyin-flash__listen-wrap {
  margin-top: var(--space-2);
}

.ziyin-flash__hint {
  margin: var(--space-2) 0 0;
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.ziyin-flash__progress {
  margin: 0 0 var(--space-3);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.ziyin-flash__grade {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
  justify-content: center;
}

/* Classic / Quest mode */

.ziyin-learn-modes {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0 0 var(--space-5);
}

.ziyin-learn-mode {
  appearance: none;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-ink-muted);
  border-radius: 0;
  padding: 0.45rem 1rem;
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.ziyin-learn-mode:hover {
  border-color: var(--color-border-strong);
  color: var(--color-ink);
}

.ziyin-learn-mode[aria-pressed="true"] {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.ziyin-switch-hint {
  margin: var(--space-3) 0 var(--space-5);
}

.ziyin-switch-link {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0;
  font: inherit;
  font-size: var(--text-sm);
  color: var(--color-ink-faint);
  cursor: pointer;
  text-align: left;
}

.ziyin-switch-link:hover {
  color: var(--color-accent);
}


.ziyin-quest {
  max-width: min(100%, 52rem);
  margin: 0 0 var(--space-8);
  padding: var(--space-6) var(--space-5) var(--space-6);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  background:
    linear-gradient(
      165deg,
      color-mix(in srgb, var(--color-accent) 12%, transparent) 0%,
      color-mix(in srgb, var(--color-paper-raised) 92%, transparent) 38%,
      var(--color-paper-raised) 100%
    );
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--color-ink) 4%, transparent);
}

html[data-theme="light"] .ziyin-quest {
  background:
    linear-gradient(
      165deg,
      color-mix(in srgb, #c4a574 18%, transparent) 0%,
      #f7f1e8 42%,
      #f3ebe0 100%
    );
  border-color: color-mix(in srgb, #c4a574 35%, var(--color-border));
}

.ziyin-quest__kicker {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
}

.ziyin-quest__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 600;
}

.ziyin-quest__lead,
.ziyin-quest__local,
.ziyin-quest__daily {
  margin: 0 0 var(--space-3);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.ziyin-quest__master {
  margin: 0 0 var(--space-4);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 600;
}

.ziyin-quest__path,
.ziyin-quest__gates {
  list-style: none;
  margin: var(--space-5) 0 var(--space-5);
  padding: 0.35rem 0 0;
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.ziyin-quest__gate {
  position: relative;
  flex: 1 1 0;
  min-width: 8.75rem;
  max-width: 11rem;
  display: grid;
  justify-items: center;
  align-content: start;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-2) var(--space-3);
  text-align: center;
  scroll-snap-align: start;
}

.ziyin-quest__gate:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 1.55rem;
  left: calc(50% + 1.35rem);
  width: calc(100% - 2.7rem);
  height: 2px;
  background: var(--color-border-strong);
  pointer-events: none;
}

.ziyin-quest__gate[data-state="cleared"]:not(:last-child)::after {
  background: color-mix(in srgb, var(--color-status-ready) 70%, var(--color-border));
}

.ziyin-quest__gate[data-state="open"]:not(:last-child)::after {
  background: color-mix(in srgb, var(--color-accent) 55%, var(--color-border));
}

.ziyin-quest__node {
  appearance: none;
  position: relative;
  z-index: 1;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 999px;
  border: 2px solid var(--color-border-strong);
  background: var(--color-paper);
  color: var(--color-ink-muted);
  display: grid;
  place-items: center;
  padding: 0;
  font: inherit;
  cursor: default;
}

button.ziyin-quest__node {
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

button.ziyin-quest__node:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.ziyin-quest__gate[data-state="locked"] .ziyin-quest__node {
  opacity: 0.72;
  border-style: dashed;
}

.ziyin-quest__gate[data-state="open"] .ziyin-quest__node {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 18%, transparent);
}

.ziyin-quest__gate[data-state="cleared"] .ziyin-quest__node {
  border-color: var(--color-status-ready);
  background: var(--color-status-ready-bg);
  color: var(--color-status-ready);
}

.ziyin-quest__node-mark {
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1;
}

.ziyin-quest__gate-emoji {
  margin: 0;
  font-size: 1rem;
  line-height: 1;
}

.ziyin-quest__gate-name {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-ink);
}

.ziyin-quest__gate-status {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
}

.ziyin-quest__gate-status[data-state="cleared"] {
  color: var(--color-status-ready);
}

.ziyin-quest__gate-status[data-state="open"] {
  color: var(--color-status-progress);
}

.ziyin-quest__gate-meta {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.ziyin-quest__gate-bar {
  width: 100%;
  height: 3px;
  background: var(--color-border);
  overflow: hidden;
}

.ziyin-quest__gate-bar > span {
  display: block;
  height: 100%;
  background: var(--color-accent);
  width: 0;
  transition: width 0.2s ease;
}

.ziyin-quest__enter {
  appearance: none;
  margin-top: var(--space-1);
  border: 1px solid var(--color-ink);
  background: var(--color-ink);
  color: var(--color-paper);
  border-radius: 0;
  padding: 0.4rem 0.7rem;
  font: inherit;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  cursor: pointer;
}

.ziyin-quest__enter:hover {
  background: transparent;
  color: var(--color-ink);
}

.ziyin-quest__enter--next {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: #fff;
}

.ziyin-quest__enter--next:hover {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.ziyin-quest__gate[data-recommended="true"] .ziyin-quest__node {
  animation: ziyin-quest-pulse 1.8s ease-in-out infinite;
}

.ziyin-quest__gate.is-focused .ziyin-quest__node {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
}

.ziyin-quest__gate.is-focused .ziyin-quest__gate-name {
  color: var(--color-accent);
}

.ziyin-quest__focus {
  margin: 0 0 var(--space-5);
  padding: var(--space-4) 0 0;
  border-top: 1px solid var(--color-border);
}

.ziyin-quest__daily-wrap {
  margin: 0 0 var(--space-4);
}

.ziyin-quest__daily {
  margin: 0 0 var(--space-2);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.ziyin-quest__daily-bar {
  height: 3px;
  background: var(--color-border);
  overflow: hidden;
}

.ziyin-quest__daily-bar > span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--color-status-progress);
  transition: width 0.2s ease;
}

.ziyin-quest__focus-progress {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink);
  font-weight: 600;
}

.ziyin-quest-celebrate {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: var(--space-6);
  background: color-mix(in srgb, var(--color-paper) 55%, transparent);
  backdrop-filter: blur(2px);
}

.ziyin-quest-celebrate[hidden] {
  display: none !important;
}

.ziyin-quest-celebrate__card {
  width: min(100%, 24rem);
  padding: var(--space-6);
  border: 1px solid var(--color-border-strong);
  border-left: 3px solid var(--color-accent);
  background: var(--color-paper-raised);
  box-shadow: var(--shadow-md);
  animation: ziyin-quest-celebrate 0.7s ease;
}

.ziyin-quest-celebrate__kicker {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.ziyin-quest-celebrate__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 600;
}

.ziyin-chunk {
  margin: 0 0 var(--space-3);
}

.ziyin-chunk__status {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: var(--leading-relaxed);
}

.ziyin-chunk__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.ziyin-quest-celebrate__body {
  margin: 0 0 var(--space-5);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  white-space: pre-line;
}

.ziyin-quest-celebrate__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.ziyin-quest__gate {
  background: color-mix(in srgb, var(--color-paper) 55%, transparent);
  border: 1px solid transparent;
}

.ziyin-quest__gate.is-focused,
.ziyin-quest__gate[data-recommended="true"] {
  border-color: color-mix(in srgb, var(--color-accent) 35%, var(--color-border));
}

.ziyin-quest__focus-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
}

.ziyin-quest__focus-task {
  margin: 0 0 var(--space-3);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.ziyin-quest__focus-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.ziyin-quest-session .ziyin-quest__enter--next {
  margin-top: var(--space-2);
}

@keyframes ziyin-quest-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 16%, transparent);
  }
  50% {
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--color-accent) 28%, transparent);
  }
}

.ziyin-quest__tools {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

@media (max-width: 720px) {
  .ziyin-quest__gate {
    min-width: 9.5rem;
    flex: 0 0 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ziyin-quest__gate[data-recommended="true"] .ziyin-quest__node {
    animation: none;
  }
}

.ziyin-quest-session {
  margin: 0 0 var(--space-4);
  max-width: 28rem;
}

.ziyin-quest-back {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--color-ink-muted);
  font: inherit;
  font-size: var(--text-sm);
  padding: 0;
  margin: 0 0 var(--space-3);
  cursor: pointer;
  text-align: left;
}

.ziyin-quest-back:hover {
  color: var(--color-accent);
}

.ziyin-quest-session__task {
  margin: 0 0 var(--space-2);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.ziyin-quest-bar {
  height: 4px;
  background: var(--color-border);
  margin: 0 0 var(--space-2);
  overflow: hidden;
}

.ziyin-quest-bar__fill {
  height: 100%;
  width: 0;
  background: var(--color-accent);
  transition: width 0.2s ease;
}

.ziyin-quest-session__progress {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.ziyin-quest-session__pass {
  margin: 0 0 var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: var(--leading-relaxed);
}

.ziyin-quest-session__pass.is-celebrating {
  animation: ziyin-quest-celebrate 1.4s ease;
}

@keyframes ziyin-quest-celebrate {
  0% {
    opacity: 0.35;
    transform: translateY(0.35rem);
  }
  35% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.ziyin-stage--quest .ziyin-controls #ziyin-prev,
.ziyin-stage--quest .ziyin-controls #ziyin-next,
.ziyin-stage--quest .ziyin-controls #ziyin-random {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .ziyin-flash__inner {
    transition: none;
  }

  .ziyin-quest__gate-bar > span,
  .ziyin-quest-bar__fill {
    transition: none;
  }

  .ziyin-quest-session__pass.is-celebrating {
    animation: none;
  }
}

@media (max-width: 768px) {
  .learn-layout {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .learn-nav {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  .ziyin-row {
    grid-template-columns: 1fr;
    gap: var(--space-1);
    padding: var(--space-3);
  }
}