/* ---------------------------------------------------------
   Cadence — English listening & shadowing
   --------------------------------------------------------- */

:root {
  --paper: #f4f1e9;
  --paper-deep: #ece7dc;
  --surface: #fffdf8;
  --surface-soft: #faf6ee;
  --ink: #16251f;
  --ink-soft: #34443d;
  --muted: #71776f;
  --muted-light: #969a91;
  --line: #e3ded2;
  --line-strong: #d6cfc1;
  --accent: #df6139;
  --accent-deep: #b94725;
  --accent-soft: #f8e8dd;
  --forest: #173d34;
  --forest-deep: #0e2b24;
  --cream: #f8f1e4;
  --gold: #d7b071;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, "Times New Roman", serif;
  --sans: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --player-space: 154px;
  --shadow-soft: 0 18px 50px rgba(44, 35, 22, 0.07);
  --shadow-card: 0 8px 24px rgba(44, 35, 22, 0.045);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 4% -5%, rgba(255, 255, 255, 0.92), transparent 31%),
    radial-gradient(circle at 96% 15%, rgba(225, 156, 105, 0.11), transparent 29%);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  padding-bottom: var(--player-space);
}

body.is-dialog-open {
  overflow: hidden;
}

::selection {
  color: var(--ink);
  background: rgba(223, 97, 57, 0.22);
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
}

h1,
h2,
h3,
p,
figure {
  margin: 0;
}

h1,
h2,
h3 {
  font-weight: 400;
}

[hidden] {
  display: none !important;
}

.is-hidden {
  display: none !important;
}

.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.icon {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
}

.icon--14 {
  width: 14px;
  height: 14px;
}

.shell {
  width: min(1240px, 100%);
  margin: 0 auto;
  padding: 0 32px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.section-kicker {
  display: inline-block;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1.4;
}

.section-kicker--light {
  color: var(--gold);
}

/* ---------------------------------------------------------
   Header
   --------------------------------------------------------- */

.site-header {
  border-bottom: 1px solid rgba(207, 199, 184, 0.7);
  background: rgba(246, 243, 236, 0.84);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 76px;
  gap: 42px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.brand-mark {
  width: 38px;
  height: 38px;
  color: var(--forest);
}

.brand-mark svg {
  width: 100%;
  height: 100%;
}

.brand-word {
  font-family: var(--serif);
  font-size: 25px;
  letter-spacing: -0.035em;
  line-height: 1;
}

.brand-cn {
  margin-left: 2px;
  padding-left: 12px;
  border-left: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.3;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 17px;
  margin-left: auto;
}

.local-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.02em;
}

.local-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #599573;
  box-shadow: 0 0 0 3px rgba(89, 149, 115, 0.12);
}

.header-icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 7px 12px 7px 10px;
  background: rgba(255, 253, 248, 0.42);
  color: var(--muted);
  font-size: 11.5px;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.header-icon-btn .icon {
  width: 16px;
  height: 16px;
}

.header-icon-btn:hover {
  border-color: #b9b1a1;
  color: var(--ink);
  background: var(--surface);
}

/* ---------------------------------------------------------
   Hero
   --------------------------------------------------------- */

.page {
  min-height: calc(100vh - 76px);
}

.hero-copy {
  min-width: 0;
  animation: rise-in 600ms var(--ease) both;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 24px;
  color: #7f8278;
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.17em;
}

.eyebrow-rule {
  width: 28px;
  height: 1px;
  background: var(--accent);
}

.eyebrow-dot {
  color: var(--accent);
}

.hero-copy h1 {
  max-width: 730px;
  font-family: var(--serif);
  font-size: clamp(45px, 5.1vw, 70px);
  letter-spacing: -0.042em;
  line-height: 0.99;
  text-wrap: balance;
}

.hero-title-zh {
  margin-top: 18px;
  color: #5d685f;
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0.08em;
}

.hero-summary {
  max-width: 580px;
  margin-top: 21px;
}

.hero-summary > p:first-child {
  color: #405047;
  font-size: 15.5px;
  line-height: 1.66;
}

.hero-summary-zh {
  margin-top: 6px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
}

.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px 17px;
  margin-top: 24px;
}

.meta-pill {
  border: 1px solid #d8d1c3;
  border-radius: 999px;
  padding: 5px 10px;
  color: #4e5a52;
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.3;
  text-transform: uppercase;
}

.meta-pill--level {
  border-color: transparent;
  color: var(--accent-deep);
  background: var(--accent-soft);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #7c8179;
  font-size: 11.5px;
}

.meta-item + .meta-item--voice::before {
  display: inline-block;
  width: 2px;
  height: 2px;
  margin-right: 9px;
  border-radius: 50%;
  background: #aaa79c;
  content: "";
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 11px 20px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), background 180ms var(--ease), border-color 180ms var(--ease);
}

.btn .icon {
  width: 16px;
  height: 16px;
}

.btn--primary {
  min-width: 135px;
  color: var(--cream);
  background: var(--forest);
  box-shadow: 0 7px 18px rgba(23, 61, 52, 0.16);
}

.btn--primary:hover {
  background: #0d2f28;
  box-shadow: 0 9px 24px rgba(23, 61, 52, 0.24);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--outline {
  border-color: #d5cdbe;
  color: #4f5c53;
  background: transparent;
}

.btn--outline:hover {
  border-color: #b5aa98;
  color: var(--ink);
  background: rgba(255, 253, 248, 0.64);
}

.hero-progress {
  width: min(330px, 100%);
  margin-top: 28px;
}

.hero-progress-label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 7px;
  color: #8a8b81;
  font-size: 10.5px;
}

.hero-progress-label span:last-child {
  color: #606b62;
  font-family: var(--mono);
  font-size: 9.5px;
}

.hero-progress-track {
  height: 3px;
  overflow: hidden;
  border-radius: 999px;
  background: #ddd7ca;
}

.hero-progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 450ms var(--ease);
}

.hero-art {
  position: relative;
  justify-self: end;
  width: min(100%, 396px);
  animation: rise-in 650ms 80ms var(--ease) both;
}

.cover-backdrop {
  position: absolute;
  top: 18px;
  right: -14px;
  bottom: -14px;
  left: 20px;
  border-radius: 28px;
  background: #d9a278;
  opacity: 0.52;
  transform: rotate(2.2deg);
}

.cover-frame {
  position: relative;
  z-index: 1;
  overflow: hidden;
  aspect-ratio: 760 / 640;
  border: 5px solid rgba(255, 252, 246, 0.68);
  border-radius: 27px;
  background: var(--paper-deep);
  box-shadow: 0 21px 50px rgba(57, 42, 26, 0.17);
  transform: rotate(-0.6deg);
}

.cover-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cover-stamp {
  position: absolute;
  right: 17px;
  bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 102px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 9px;
  padding: 8px 11px;
  color: var(--cream);
  background: rgba(20, 48, 40, 0.82);
  backdrop-filter: blur(8px);
}

.cover-stamp-top {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.09em;
}

.cover-stamp-bottom {
  color: rgba(248, 241, 228, 0.68);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.16em;
}

.art-note {
  position: absolute;
  z-index: 2;
  bottom: -20px;
  left: -48px;
  display: flex;
  gap: 3px;
  width: 170px;
  border: 1px solid rgba(203, 194, 178, 0.8);
  border-radius: 14px;
  padding: 15px 14px 14px;
  color: #5a665c;
  background: rgba(255, 252, 245, 0.92);
  box-shadow: 0 14px 32px rgba(45, 37, 26, 0.12);
  font-family: var(--serif);
  font-size: 13px;
  line-height: 1.65;
  transform: rotate(-2deg);
}

.art-note-mark {
  margin-top: -5px;
  color: var(--accent);
  font-family: var(--serif);
  font-size: 36px;
  line-height: 1;
}

.transcript-card {
  --reader-height: clamp(360px, 58vh, 560px);
  overflow: hidden;
  border: 1px solid rgba(217, 210, 197, 0.85);
  border-radius: var(--radius-lg);
  padding: 28px 30px 20px;
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.transcript-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.transcript-head h2,
.section-title-row h2 {
  margin-top: 3px;
  font-family: var(--serif);
  font-size: 30px;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.transcript-toggles {
  display: flex;
  align-items: center;
  gap: 2px;
  padding-bottom: 1px;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 6px 9px;
  color: #8a8c82;
  background: transparent;
  font-size: 11px;
  white-space: nowrap;
  transition: color 180ms var(--ease), background 180ms var(--ease);
}

.toggle:hover {
  color: var(--ink);
  background: #f8f4eb;
}

.toggle.is-on {
  color: #4a574e;
}

.toggle-track {
  position: relative;
  display: inline-block;
  width: 25px;
  height: 14px;
  border-radius: 999px;
  background: #d7d2c7;
  transition: background 180ms var(--ease);
}

.toggle-track span {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #fffdf8;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
  transition: transform 200ms var(--ease);
}

.toggle.is-on .toggle-track {
  background: var(--forest);
}

.toggle.is-on .toggle-track span {
  transform: translateX(11px);
}

.transcript-subhead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 14px;
  padding: 11px 1px 13px;
  border-top: 1px solid var(--line);
  color: #94958c;
  font-size: 11px;
}

.keyboard-hint {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #a2a299;
  font-size: 10px;
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 20px;
  border: 1px solid #d9d2c4;
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0 5px;
  color: #70766e;
  background: #faf6ee;
  font-family: var(--mono);
  font-size: 9px;
  line-height: 1;
}

/* ---------------------------------------------------------
   Transcript
   --------------------------------------------------------- */

.reader-view {
  height: var(--reader-height);
  overflow: hidden;
}

.transcript-list {
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  margin: 0 -11px;
  padding: 1px 11px 4px;
}

.transcript-list {
  overscroll-behavior: contain;
  scrollbar-color: #d4cbbb transparent;
  scrollbar-width: thin;
}

.transcript-list::-webkit-scrollbar {
  width: 5px;
}

.transcript-list::-webkit-scrollbar-thumb {
  border-radius: 10px;
  background: #d4cbbb;
}

.transcript-list::-webkit-scrollbar-track {
  background: transparent;
}

.playlist-filters {
  position: sticky;
  top: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin: 0 0 6px;
  border-bottom: 1px solid var(--line);
  padding: 3px 0 9px;
  background: var(--surface);
}

.playlist-filters[hidden] {
  display: none;
}

.playlist-search {
  position: relative;
  display: flex;
  align-items: center;
}

.playlist-search-icon {
  position: absolute;
  left: 10px;
  width: 13px;
  height: 13px;
  color: #a2a095;
  pointer-events: none;
}

.playlist-search-input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 30px 6px 29px;
  color: var(--ink);
  background: var(--surface-soft);
  font: inherit;
  font-size: 11px;
  line-height: 1.4;
  transition: border-color 160ms var(--ease), background 160ms var(--ease);
}

.playlist-search-input::placeholder {
  color: #a2a095;
}

.playlist-search-input:hover {
  border-color: #b9b1a1;
}

.playlist-search-input:focus-visible {
  border-color: var(--forest);
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.playlist-search-input::-webkit-search-cancel-button,
.playlist-search-input::-webkit-search-decoration {
  -webkit-appearance: none;
  appearance: none;
}

.playlist-search-clear {
  position: absolute;
  right: 5px;
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border: 0;
  border-radius: 50%;
  padding: 0;
  color: #a2a095;
  background: transparent;
  cursor: pointer;
}

.playlist-search-clear[hidden] {
  display: none;
}

.playlist-search-clear .icon {
  width: 11px;
  height: 11px;
}

.playlist-search-clear:hover {
  color: var(--ink);
  background: rgba(0, 0, 0, 0.05);
}

.playlist-search-clear:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.playlist-filter-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.playlist-filter-label {
  flex: 0 0 26px;
  padding-top: 5px;
  color: #a2a095;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.playlist-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  min-width: 0;
}

.filter-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 9px;
  color: #7d837b;
  background: transparent;
  font: inherit;
  font-size: 9.5px;
  line-height: 1.45;
  cursor: pointer;
  transition: border-color 160ms var(--ease), background 160ms var(--ease), color 160ms var(--ease);
}

.filter-chip:hover {
  border-color: #b9b1a1;
  color: var(--ink);
}

.filter-chip.is-active {
  border-color: var(--forest);
  color: var(--cream);
  background: var(--forest);
}

.filter-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.playlist-empty--filtered p {
  margin: 0 0 4px;
}

.playlist-filter-clear {
  margin-top: 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 6px 14px;
  color: var(--ink-soft);
  background: var(--surface);
  font: inherit;
  font-size: 11px;
  cursor: pointer;
  transition: border-color 160ms var(--ease), background 160ms var(--ease);
}

.playlist-filter-clear:hover {
  border-color: #b9b1a1;
  background: var(--surface-soft);
}

.playlist-more {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  margin-top: 18px;
}

.playlist-more[hidden] {
  display: none;
}

.playlist-more-btn {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 9px 22px;
  color: var(--ink-soft);
  background: var(--surface);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 160ms var(--ease), background 160ms var(--ease);
}

.playlist-more-btn:hover:not(:disabled) {
  border-color: var(--forest);
  background: var(--surface-soft);
}

.playlist-more-btn:disabled {
  cursor: progress;
  opacity: 0.65;
}

.playlist-more-status {
  color: var(--muted-light);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.03em;
}

.sentence {
  position: relative;
  display: grid;
  grid-template-columns: 45px minmax(0, 1fr) 63px;
  gap: 12px;
  align-items: center;
  border-left: 3px solid transparent;
  border-radius: 13px;
  padding: 15px 8px 15px 7px;
  transition: background 220ms var(--ease), border-color 220ms var(--ease);
  cursor: default;
}

.sentence:not(:last-child)::after {
  position: absolute;
  right: 9px;
  bottom: 0;
  left: 64px;
  height: 1px;
  background: var(--line);
  content: "";
  opacity: 0.72;
  transition: opacity 180ms var(--ease);
}

.sentence:hover {
  background: rgba(247, 242, 232, 0.72);
}

.sentence.is-active {
  border-left-color: var(--accent);
  background: linear-gradient(90deg, rgba(223, 97, 57, 0.105), rgba(223, 97, 57, 0.022));
}

.sentence.is-active::after {
  opacity: 0;
}

.sentence-time {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  align-self: start;
  margin-top: 4px;
  border: 0;
  padding: 0 0 0 4px;
  color: #a2a096;
  background: transparent;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: -0.02em;
  line-height: 1.4;
  transition: color 180ms var(--ease);
}

.sentence-time:hover {
  color: var(--accent);
}

.sentence-time .mini-play {
  width: 12px;
  height: 12px;
  color: var(--accent);
  opacity: 0;
  transform: translateY(-1px);
  transition: opacity 180ms var(--ease);
}

.sentence:hover .mini-play,
.sentence.is-active .mini-play {
  opacity: 0.9;
}

.sentence.is-active .sentence-time {
  color: var(--accent-deep);
}

.sentence-main {
  min-width: 0;
  border-radius: 5px;
  outline: none;
  cursor: pointer;
}

.sentence-main:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}

.sentence-en {
  color: #2b3831;
  font-family: var(--serif);
  font-size: 19px;
  letter-spacing: -0.006em;
  line-height: 1.48;
  transition: color 180ms var(--ease);
}

.sentence.is-active .sentence-en {
  color: #1a2b23;
}

.sentence-zh {
  margin-top: 4px;
  color: #8d8e84;
  font-size: 12.5px;
  letter-spacing: 0.01em;
  line-height: 1.65;
  transition: opacity 180ms var(--ease);
}

.transcript-list.hide-translation .sentence-zh {
  display: none;
}

.sentence-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
  opacity: 0;
  transform: translateY(2px);
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}

.sentence:hover .sentence-actions,
.sentence.is-active .sentence-actions,
.sentence:focus-within .sentence-actions {
  opacity: 1;
  transform: translateY(0);
}

.sentence-action {
  position: relative;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 50%;
  color: #8d8f85;
  background: transparent;
  transition: color 160ms var(--ease), background 160ms var(--ease);
}

.sentence-action .icon {
  width: 14px;
  height: 14px;
}

.sentence-action:hover {
  color: var(--accent-deep);
  background: rgba(223, 97, 57, 0.105);
}

.sentence-action.is-recorded {
  color: var(--accent);
}

.sentence-action.is-looping {
  color: var(--accent-deep);
  background: rgba(223, 97, 57, 0.16);
}

.sentence-action.is-recorded::after {
  position: absolute;
  width: 3px;
  height: 3px;
  margin: 17px 0 0 17px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
}

.transcript-loading {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 26px 12px 20px 67px;
}

.transcript-loading span {
  display: block;
  width: 92%;
  height: 17px;
  border-radius: 5px;
  background: linear-gradient(90deg, #f0ece3 25%, #f8f5ed 50%, #f0ece3 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
}

.transcript-loading span:nth-child(2) {
  width: 78%;
}

.transcript-loading span:nth-child(3) {
  width: 86%;
}

.load-error {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 7px;
  margin: 18px 0;
  padding: 24px;
  border: 1px solid rgba(223, 97, 57, 0.2);
  border-radius: 16px;
  background: rgba(223, 97, 57, 0.055);
}

.load-error strong {
  font-family: var(--serif);
  font-size: 20px;
  color: var(--ink);
}

.load-error p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.load-retry {
  margin-top: 7px;
  border: 0;
  border-radius: 999px;
  padding: 9px 17px;
  color: var(--cream);
  background: var(--forest);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.playlist-empty {
  margin: 0;
  padding: 24px 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
}

.empty-library {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  margin: 18px 0;
  padding: 28px 25px;
  border: 1px dashed var(--line-strong);
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.5);
}

.empty-library strong {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  color: var(--ink);
}

.empty-library p {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.empty-library-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  margin-top: 7px;
  border-radius: 999px;
  padding: 8px 17px;
  color: var(--cream);
  background: var(--forest);
  font-size: 12.5px;
  transition: background 180ms var(--ease), transform 180ms var(--ease);
}

.empty-library-link:hover {
  background: var(--forest-deep);
  transform: translateY(-1px);
}

.btn:disabled,
.header-icon-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.player button:disabled,
.player input:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

/* ---------------------------------------------------------
   Shadowing / practice panel
   --------------------------------------------------------- */

.practice-panel {
  position: relative;
  overflow: hidden;
  margin: 15px 0 16px;
  border-radius: 19px;
  padding: 21px 22px 15px;
  color: var(--cream);
  background:
    radial-gradient(circle at 100% 0%, rgba(230, 148, 91, 0.2), transparent 37%),
    radial-gradient(circle at 3% 100%, rgba(214, 177, 113, 0.1), transparent 32%),
    var(--forest);
  box-shadow: 0 13px 28px rgba(15, 43, 36, 0.1);
  animation: panel-in 300ms var(--ease) both;
}

.practice-panel::after {
  position: absolute;
  top: -70px;
  right: 70px;
  width: 155px;
  height: 155px;
  border: 1px solid rgba(232, 215, 186, 0.1);
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.practice-head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.practice-head h3 {
  margin-top: 2px;
  font-family: var(--serif);
  font-size: 23px;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.practice-head-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.practice-counter {
  border: 1px solid rgba(244, 234, 215, 0.2);
  border-radius: 999px;
  padding: 5px 10px;
  color: rgba(248, 241, 228, 0.63);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid transparent;
  border-radius: 50%;
  padding: 0;
  color: var(--muted);
  background: transparent;
  transition: color 160ms var(--ease), background 160ms var(--ease), border-color 160ms var(--ease);
}

.icon-button .icon {
  width: 17px;
  height: 17px;
}

.icon-button:hover {
  color: var(--ink);
  background: var(--surface-soft);
}

.icon-button--light {
  color: rgba(248, 241, 228, 0.62);
}

.icon-button--light:hover {
  border-color: rgba(248, 241, 228, 0.16);
  color: var(--cream);
  background: rgba(255, 255, 255, 0.08);
}

.practice-body {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.9fr);
  gap: 27px;
  align-items: center;
  padding: 22px 0 19px;
}

.practice-copy {
  min-height: 80px;
}

.practice-en {
  color: #f8f0e1;
  font-family: var(--serif);
  font-size: 21px;
  line-height: 1.43;
  text-wrap: pretty;
}

.practice-zh {
  margin-top: 7px;
  color: rgba(244, 234, 216, 0.54);
  font-size: 11.5px;
  line-height: 1.7;
}

.practice-deck {
  min-width: 0;
}

.record-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 30px;
  margin-bottom: 9px;
}

.record-visual span {
  width: 3px;
  height: 7px;
  border-radius: 4px;
  background: rgba(238, 218, 186, 0.22);
  transform-origin: center;
  transition: height 160ms var(--ease), background 160ms var(--ease);
}

.record-visual span:nth-child(3n) {
  height: 13px;
}

.record-visual span:nth-child(4n) {
  height: 19px;
}

.record-visual span:nth-child(5n) {
  height: 10px;
}

.record-visual.is-recording span {
  background: #ef9a77;
  animation: record-wave 800ms ease-in-out infinite alternate;
}

.record-visual.is-recording span:nth-child(2n) {
  animation-delay: -220ms;
}

.record-visual.is-recording span:nth-child(3n) {
  animation-delay: -430ms;
}

.record-visual.is-recording span:nth-child(4n) {
  animation-delay: -130ms;
}

.record-visual.is-recording span:nth-child(5n) {
  animation-delay: -580ms;
}

.record-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.practice-btn,
.record-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 35px;
  border-radius: 9px;
  padding: 7px 10px;
  font-size: 10.5px;
  white-space: nowrap;
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease), opacity 160ms var(--ease);
}

.practice-btn {
  border: 1px solid rgba(243, 230, 208, 0.18);
  color: rgba(248, 241, 228, 0.83);
  background: rgba(255, 255, 255, 0.055);
}

.practice-btn:hover:not(:disabled) {
  border-color: rgba(243, 230, 208, 0.34);
  color: var(--cream);
  background: rgba(255, 255, 255, 0.1);
}

.practice-btn:disabled {
  opacity: 0.36;
}

.practice-btn .icon,
.record-button .icon {
  width: 14px;
  height: 14px;
}

.record-button {
  border: 1px solid transparent;
  color: #fff8ec;
  background: var(--accent);
  box-shadow: 0 4px 12px rgba(193, 70, 35, 0.24);
}

.record-button:hover {
  background: #ee7047;
}

.record-button.is-recording {
  background: #c94b2d;
  animation: record-pulse 1.7s ease-in-out infinite;
}

.record-status {
  min-height: 16px;
  margin-top: 9px;
  color: rgba(245, 233, 213, 0.45);
  font-size: 9.5px;
  text-align: center;
}

.practice-footer {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid rgba(241, 226, 200, 0.13);
  padding-top: 11px;
}

.text-button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 0;
  padding: 3px 0;
  color: rgba(247, 235, 214, 0.62);
  background: transparent;
  font-size: 10.5px;
  transition: color 160ms var(--ease);
}

.text-button .icon {
  width: 14px;
  height: 14px;
}

.text-button:hover {
  color: var(--cream);
}

.practice-tip {
  color: rgba(244, 232, 211, 0.36);
  font-size: 9.5px;
  text-align: center;
}

/* ---------------------------------------------------------
   Words in this story
   --------------------------------------------------------- */

.word-section {
  margin-top: 34px;
}

.word-text {
  border: 1px solid rgba(219, 211, 197, 0.85);
  border-radius: 16px;
  padding: 18px 20px;
  color: #4f574f;
  background: rgba(255, 253, 248, 0.72);
  font-size: 14px;
  line-height: 1.9;
  white-space: pre-line;
  overflow-wrap: anywhere;
}

/* ---------------------------------------------------------
   Key phrases
   --------------------------------------------------------- */

.phrase-section {
  margin-top: 34px;
}

.section-title-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 16px;
  padding: 0 2px;
}

.section-title-row h2 {
  font-size: 27px;
}

.section-count {
  color: #999a90;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.03em;
}

.phrase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
}

.phrase-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 175px;
  overflow: hidden;
  border: 1px solid rgba(219, 211, 197, 0.85);
  border-radius: 17px;
  padding: 18px 17px 16px;
  background: rgba(255, 253, 248, 0.72);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease), background 200ms var(--ease);
}

.phrase-card:hover {
  border-color: #cabfae;
  background: var(--surface);
  transform: translateY(-2px);
}

.phrase-number {
  color: #b0aa9d;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.phrase-word {
  margin-top: 13px;
  font-family: var(--serif);
  font-size: 21px;
  letter-spacing: -0.015em;
  line-height: 1.1;
}

.phrase-phonetic {
  margin-top: 5px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: -0.01em;
}

.phrase-meaning {
  margin-top: 9px;
  color: #5b665e;
  font-size: 12px;
}

.phrase-example {
  margin-top: auto;
  padding-top: 13px;
  color: #99998e;
  font-family: var(--serif);
  font-size: 12px;
  font-style: italic;
  line-height: 1.53;
}

.phrase-example::before {
  color: #c7b6a2;
  content: "“";
}

.phrase-example::after {
  color: #c7b6a2;
  content: "”";
}

.episode {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  min-width: 0;
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 0;
  text-align: left;
  background: var(--surface);
  box-shadow: var(--shadow-card);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), border-color 180ms var(--ease);
}

.episode:hover {
  transform: translateY(-4px);
  border-color: #b4bdb1;
  box-shadow: var(--shadow-soft);
}

.episode.is-active {
  border-color: var(--forest);
  background: var(--surface-soft);
}

.episode-cover {
  position: relative;
  display: block;
  flex: 0 0 auto;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--paper-deep);
}

.episode-cover::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 43, 36, 0.12), transparent 40%, rgba(14, 43, 36, 0.3));
  pointer-events: none;
  content: "";
}

.episode-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 450ms var(--ease);
}

.episode:hover .episode-cover img {
  transform: scale(1.045);
}

.episode-number,
.episode-duration,
.episode-history {
  position: absolute;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border-radius: 7px;
  padding: 5px 8px;
  color: var(--cream);
  background: rgba(14, 43, 36, 0.78);
  line-height: 1.2;
  backdrop-filter: blur(6px);
}

.episode-number {
  top: 12px;
  left: 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
}

.episode-duration {
  right: 12px;
  bottom: 12px;
  font-family: var(--mono);
  font-size: 11px;
}

.episode-duration .icon,
.episode-history .icon {
  width: 13px;
  height: 13px;
}

.episode-history {
  bottom: 12px;
  left: 12px;
  display: none;
  font-size: 11px;
}

.episode.is-listened .episode-history {
  display: inline-flex;
}

.episode-waves {
  position: absolute;
  z-index: 1;
  top: 12px;
  right: 12px;
  display: none;
  align-items: center;
  gap: 3px;
  min-height: 27px;
  border-radius: 7px;
  padding: 5px 9px;
  color: var(--cream);
  background: var(--forest);
}

.episode.is-playing .episode-waves {
  display: inline-flex;
}

.episode-wave {
  display: block;
  width: 2px;
  height: 5px;
  border-radius: 2px;
  background: var(--gold);
  animation: eq 820ms ease-in-out infinite alternate;
}

.episode-wave:nth-child(2) {
  height: 10px;
  animation-delay: -260ms;
}

.episode-wave:nth-child(3) {
  height: 7px;
  animation-delay: -480ms;
}

.episode-playing-label {
  margin-left: 5px;
  font-size: 10px;
}

.episode-copy {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
  padding: 20px 22px;
}

.episode-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.episode-category {
  overflow: hidden;
  color: #647168;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.episode.is-active .episode-category {
  color: var(--accent-deep);
}

.episode-level {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 9px;
  color: var(--forest);
  background: var(--paper);
  font-size: 11px;
}

.episode-title {
  display: -webkit-box;
  overflow: hidden;
  margin-top: 12px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 23px;
  letter-spacing: -0.02em;
  line-height: 1.28;
  overflow-wrap: anywhere;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.episode-zh {
  display: -webkit-box;
  overflow: hidden;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
  overflow-wrap: anywhere;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.episode-bottom {
  display: flex;
  align-items: flex-end;
  gap: 22px;
  margin-top: auto;
  padding-top: 24px;
}

.episode-progress-group {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 9px;
  min-width: 0;
  padding-bottom: 6px;
}

.episode-progress-label {
  color: var(--muted);
  font-size: 11px;
}

.episode-progress {
  height: 3px;
  overflow: hidden;
  border-radius: 99px;
  background: var(--line);
}

.episode-progress span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 400ms var(--ease);
}

.episode-action {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--forest);
  background: var(--surface);
  transition: color 180ms var(--ease), background 180ms var(--ease);
}

.episode-action .icon {
  width: 16px;
  height: 16px;
}

.episode:hover .episode-action,
.episode.is-active .episode-action {
  color: var(--cream);
  border-color: var(--forest);
  background: var(--forest);
}

.episode-playing-icon,
.episode.is-playing .episode-play-icon {
  display: none;
}

.episode.is-playing .episode-playing-icon {
  display: block;
}

.playlist-foot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 9px;
  border-top: 1px solid var(--line);
  padding: 12px 8px 3px;
  color: #a5a398;
  font-size: 9.5px;
}

.playlist-foot .icon {
  width: 13px;
  height: 13px;
}

.episode-skeleton {
  height: 360px;
  border-radius: 20px;
  background: linear-gradient(90deg, #f4efe6 25%, #faf7f0 50%, #f4efe6 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
}

.tip-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 25px 24px 20px;
  color: var(--cream);
  background:
    radial-gradient(circle at 100% 0%, rgba(221, 169, 100, 0.16), transparent 42%),
    var(--forest);
  box-shadow: 0 15px 34px rgba(20, 51, 43, 0.11);
}

.tip-orbit {
  position: absolute;
  border: 1px solid rgba(238, 220, 189, 0.13);
  border-radius: 50%;
  pointer-events: none;
}

.tip-orbit--one {
  top: -65px;
  right: -60px;
  width: 180px;
  height: 180px;
}

.tip-orbit--two {
  top: -28px;
  right: -20px;
  width: 100px;
  height: 100px;
}

.tip-kicker {
  position: relative;
  color: var(--gold);
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.17em;
}

.tip-card h2 {
  position: relative;
  margin-top: 16px;
  font-family: var(--serif);
  font-size: 27px;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.tip-card p {
  position: relative;
  margin-top: 12px;
  color: rgba(244, 233, 213, 0.59);
  font-size: 11px;
  line-height: 1.75;
}

.tip-action {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-top: 19px;
  border: 0;
  border-top: 1px solid rgba(239, 223, 195, 0.15);
  padding: 13px 0 0;
  color: rgba(248, 240, 225, 0.78);
  background: transparent;
  font-size: 10px;
  transition: color 160ms var(--ease);
}

.tip-action:hover {
  color: var(--cream);
}

.tip-key {
  display: grid;
  place-items: center;
  width: 21px;
  height: 21px;
  border: 1px solid rgba(239, 223, 195, 0.25);
  border-radius: 5px;
  color: var(--gold);
  font-family: var(--mono);
  font-size: 10px;
}

.page-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 44px;
  border-top: 1px solid var(--line);
  padding: 22px 2px 38px;
  color: #a3a196;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.025em;
}

/* ---------------------------------------------------------
   Fixed player
   --------------------------------------------------------- */

.player {
  position: fixed;
  z-index: 100;
  right: 0;
  bottom: 0;
  left: 0;
  color: var(--cream);
  border-top: 1px solid rgba(245, 238, 225, 0.1);
  background:
    radial-gradient(circle at 8% 140%, rgba(213, 158, 100, 0.1), transparent 34%),
    rgba(15, 42, 35, 0.975);
  box-shadow: 0 -15px 38px rgba(21, 31, 26, 0.13);
  backdrop-filter: blur(22px);
}

.player-inner {
  display: grid;
  grid-template-columns: minmax(220px, 285px) minmax(360px, 1fr) minmax(185px, 224px);
  gap: 26px;
  align-items: center;
  width: min(1400px, 100%);
  margin: 0 auto;
  padding: 12px 32px 11px;
}

.player-track {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.player-cover {
  position: relative;
  overflow: hidden;
  flex: 0 0 auto;
  width: 53px;
  height: 53px;
  border: 1px solid rgba(244, 234, 216, 0.16);
  border-radius: 11px;
  background: #2a4b41;
}

.player-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 300ms var(--ease);
}

.player-eq {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: none;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  height: 23px;
  padding: 6px 0 5px;
  background: linear-gradient(transparent, rgba(9, 30, 24, 0.78));
}

.player.is-playing .player-eq {
  display: flex;
}

.player-eq span {
  width: 2.5px;
  height: 7px;
  border-radius: 2px;
  background: var(--cream);
  animation: eq 760ms ease-in-out infinite alternate;
}

.player-eq span:nth-child(2) {
  height: 11px;
  animation-delay: -240ms;
}

.player-eq span:nth-child(3) {
  height: 5px;
  animation-delay: -430ms;
}

.player-track-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: 1px;
}

.player-kicker {
  overflow: hidden;
  color: rgba(244, 233, 215, 0.48);
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: 0.1em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.player-title {
  overflow: hidden;
  color: #f8f0e2;
  font-family: var(--serif);
  font-size: 14.5px;
  letter-spacing: -0.01em;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-subtitle {
  overflow: hidden;
  color: rgba(242, 232, 214, 0.45);
  font-size: 9.5px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-center {
  min-width: 0;
}

.player-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 45px;
}

.player-icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  padding: 0;
  color: rgba(245, 234, 215, 0.62);
  background: transparent;
  transition: color 160ms var(--ease), background 160ms var(--ease), opacity 160ms var(--ease);
}

.player-icon .icon {
  width: 17px;
  height: 17px;
}

.player-icon:hover {
  color: var(--cream);
  background: rgba(255, 255, 255, 0.07);
}

.player-icon--skip .icon {
  width: 22px;
  height: 22px;
}

.player-icon--loop.is-active {
  color: #f3cc92;
  background: rgba(231, 176, 103, 0.12);
}

.player-icon--loop.is-active::after {
  position: absolute;
  width: 3px;
  height: 3px;
  margin-top: 24px;
  border-radius: 50%;
  background: #ef966d;
  content: "";
}

.player-icon--favorite.is-active {
  color: #ef966d;
  background: rgba(239, 150, 109, 0.12);
}

.player-icon--favorite.is-active:hover {
  color: #f2aa87;
  background: rgba(239, 150, 109, 0.18);
}

.play-button {
  display: grid;
  place-items: center;
  width: 47px;
  height: 47px;
  border: 0;
  border-radius: 50%;
  margin: 0 2px;
  color: var(--forest);
  background: #f4e8d3;
  box-shadow: 0 4px 14px rgba(4, 17, 13, 0.2);
  transition: transform 160ms var(--ease), background 160ms var(--ease);
}

.play-button .icon {
  width: 20px;
  height: 20px;
}

.play-button .js-play-icon {
  transform: translateX(1px);
}

.play-button:hover {
  background: #fff7e7;
  transform: scale(1.04);
}

.play-button:active {
  transform: scale(0.97);
}

.player-timeline {
  display: flex;
  align-items: center;
  gap: 9px;
  height: 19px;
}

.time-label {
  flex: 0 0 34px;
  color: rgba(243, 233, 214, 0.48);
  font-family: var(--mono);
  font-size: 8.5px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.time-label:last-child {
  text-align: right;
}

.scrubber {
  position: relative;
  flex: 1;
  height: 18px;
  cursor: pointer;
}

.scrubber-buffer,
.scrubber-fill {
  position: absolute;
  top: 50%;
  left: 0;
  height: 3px;
  border-radius: 99px;
  pointer-events: none;
  transform: translateY(-50%);
}

.scrubber-buffer {
  width: 0;
  background: rgba(246, 235, 215, 0.15);
}

.scrubber-fill {
  width: 0;
  background: var(--accent);
}

.scrubber-thumb {
  position: absolute;
  top: 50%;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #f8ecd8;
  box-shadow: 0 0 0 3px rgba(223, 97, 57, 0.24);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0.8);
  transition: opacity 140ms var(--ease), transform 140ms var(--ease);
}

.scrubber:hover .scrubber-thumb,
.scrubber:focus-within .scrubber-thumb,
.scrubber.is-scrubbing .scrubber-thumb {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.scrubber:hover .scrubber-fill {
  height: 4px;
}

.scrubber input[type="range"] {
  position: absolute;
  z-index: 3;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

.scrubber input[type="range"]:focus-visible {
  outline: none;
}

.scrubber:focus-within::after {
  position: absolute;
  inset: 1px -3px;
  border: 1px solid rgba(244, 232, 212, 0.3);
  border-radius: 5px;
  content: "";
  pointer-events: none;
}

.scrubber-tooltip {
  position: absolute;
  z-index: 4;
  bottom: 18px;
  left: 0;
  border-radius: 4px;
  padding: 3px 5px;
  color: var(--ink);
  background: var(--cream);
  font-family: var(--mono);
  font-size: 8px;
  pointer-events: none;
  transform: translateX(-50%);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.player-extra {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
}

.player-extra .player-icon {
  position: relative;
  width: 29px;
  height: 29px;
}

.player-extra .player-icon .icon {
  width: 16px;
  height: 16px;
}

.speed-control {
  position: relative;
}

.speed-button {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  height: 28px;
  border: 1px solid rgba(244, 232, 212, 0.16);
  border-radius: 7px;
  padding: 0 6px 0 8px;
  color: rgba(246, 236, 218, 0.72);
  background: transparent;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: -0.01em;
  transition: border-color 160ms var(--ease), color 160ms var(--ease), background 160ms var(--ease);
}

.speed-button:hover,
.speed-button[aria-expanded="true"] {
  border-color: rgba(244, 232, 212, 0.3);
  color: var(--cream);
  background: rgba(255, 255, 255, 0.05);
}

.speed-button .icon {
  width: 12px;
  height: 12px;
  opacity: 0.6;
}

.speed-menu {
  position: absolute;
  right: 0;
  bottom: calc(100% + 9px);
  display: grid;
  grid-template-columns: 1fr;
  width: 128px;
  border: 1px solid #e5ddce;
  border-radius: 11px;
  padding: 7px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 12px 35px rgba(8, 25, 19, 0.2);
  animation: menu-in 160ms var(--ease) both;
}

.speed-menu-label {
  padding: 5px 8px 6px;
  color: #9f9c91;
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.speed-menu button {
  border: 0;
  border-radius: 6px;
  padding: 6px 8px;
  color: #525d55;
  background: transparent;
  font-family: var(--mono);
  font-size: 10px;
  text-align: left;
  transition: background 140ms var(--ease), color 140ms var(--ease);
}

.speed-menu button:hover {
  background: #f6f1e8;
}

.speed-menu button.is-current {
  color: #f8f0e2;
  background: var(--forest);
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 1px;
}

.volume-slider {
  width: 55px;
  height: 18px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--cream);
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
}

.volume-slider::-webkit-slider-runnable-track {
  height: 3px;
  border-radius: 99px;
  background: rgba(245, 234, 215, 0.2);
}

.volume-slider::-moz-range-track {
  height: 3px;
  border-radius: 99px;
  background: rgba(245, 234, 215, 0.2);
}

.volume-slider::-webkit-slider-thumb {
  width: 9px;
  height: 9px;
  margin-top: -3px;
  border: 0;
  border-radius: 50%;
  background: #efe3cd;
  -webkit-appearance: none;
  appearance: none;
}

.volume-slider::-moz-range-thumb {
  width: 9px;
  height: 9px;
  border: 0;
  border-radius: 50%;
  background: #efe3cd;
}

.volume-slider:focus-visible {
  outline-offset: 2px;
}

/* ---------------------------------------------------------
   Dialog and toast
   --------------------------------------------------------- */

.shortcuts-dialog {
  width: min(570px, calc(100vw - 32px));
  max-height: min(700px, calc(100vh - 40px));
  overflow-y: auto;
  border: 1px solid #e0d7c8;
  border-radius: 23px;
  padding: 28px 29px 24px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 30px 80px rgba(8, 25, 19, 0.3);
}

.shortcuts-dialog[open] {
  animation: dialog-in 260ms var(--ease) both;
}

.shortcuts-dialog::backdrop {
  background: rgba(12, 31, 25, 0.55);
  backdrop-filter: blur(5px);
}

.dialog-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 17px;
}

.dialog-head h2 {
  margin-top: 3px;
  font-family: var(--serif);
  font-size: 28px;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.shortcut-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  overflow: hidden;
  margin-top: 19px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--line);
}

.shortcut-grid > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 9px;
  min-height: 49px;
  padding: 10px 13px;
  background: var(--surface);
  font-size: 11px;
}

.shortcut-grid > div > span:first-child {
  display: inline-flex;
  gap: 4px;
}

.shortcut-grid > div > span:last-child {
  color: #777c74;
  text-align: right;
}

.dialog-note {
  margin-top: 17px;
  color: #92948a;
  font-size: 10.5px;
  line-height: 1.65;
}

/* ---------------------------------------------------------
   History drawer
   --------------------------------------------------------- */

.history-dialog {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(410px, 100vw);
  max-width: none;
  height: 100%;
  max-height: none;
  margin: 0;
  border: 0;
  border-left: 1px solid var(--line-strong);
  border-radius: 0;
  padding: 0;
  color: var(--ink);
  background: var(--surface);
  box-shadow: -26px 0 70px rgba(8, 25, 19, 0.22);
  overflow: hidden;
}

.history-dialog[open] {
  display: flex;
  flex-direction: column;
  animation: drawer-in 300ms var(--ease) both;
}

.history-dialog::backdrop {
  background: rgba(12, 31, 25, 0.44);
  backdrop-filter: blur(3px);
}

.history-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding: 26px 24px 17px;
}

.history-head h2 {
  margin-top: 3px;
  font-family: var(--serif);
  font-size: 28px;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.history-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 24px 7px;
}

.history-count {
  color: var(--muted-light);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.05em;
}

.history-clear {
  border: 0;
  padding: 4px 0;
  color: var(--muted);
  background: transparent;
  font-size: 11px;
  transition: color 160ms var(--ease);
}

.history-clear:hover:not(:disabled) {
  color: var(--accent-deep);
}

.history-clear:disabled {
  opacity: 0.4;
  cursor: default;
}

.history-list {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 6px 16px 18px;
}

.history-item {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) 26px;
  align-items: center;
  gap: 12px;
  width: 100%;
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 9px;
  text-align: left;
  background: transparent;
  transition: background 180ms var(--ease), border-color 180ms var(--ease);
}

.history-item:hover {
  background: #faf6ee;
}

.history-item.is-active {
  border-color: #e7ded0;
  background: #f8f2e8;
}

.history-cover {
  position: relative;
  overflow: hidden;
  width: 58px;
  height: 58px;
  border-radius: 9px;
  background: #e8e1d4;
}

.history-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.history-number {
  position: absolute;
  top: 4px;
  left: 4px;
  border-radius: 4px;
  padding: 2px 4px;
  color: var(--cream);
  background: rgba(16, 43, 36, 0.68);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.04em;
  backdrop-filter: blur(4px);
}

.history-copy {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.history-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.history-category {
  overflow: hidden;
  color: #9b9a8f;
  font-family: var(--mono);
  font-size: 7.5px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.history-duration {
  flex: 0 0 auto;
  color: #aaa79b;
  font-family: var(--mono);
  font-size: 8px;
}

.history-title {
  display: -webkit-box;
  overflow: hidden;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: -0.012em;
  line-height: 1.25;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.history-zh {
  overflow: hidden;
  color: #93948a;
  font-size: 9.5px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-play {
  width: 16px;
  height: 16px;
  justify-self: center;
  color: #b6b1a4;
  transition: color 180ms var(--ease), transform 180ms var(--ease);
}

.history-item:hover .history-play,
.history-item.is-active .history-play {
  color: var(--accent);
}

.history-item:hover .history-play {
  transform: scale(1.08);
}

.history-empty {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 18px 8px;
  border: 1px dashed var(--line-strong);
  border-radius: 18px;
  padding: 30px 22px;
  text-align: center;
  background: rgba(255, 253, 248, 0.5);
}

.history-empty strong {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 400;
}

.history-empty p {
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.7;
}

.history-note {
  border-top: 1px solid var(--line);
  padding: 13px 24px calc(13px + env(safe-area-inset-bottom, 0px));
  color: #a5a398;
  font-size: 9.5px;
  line-height: 1.6;
}

.toast {
  position: fixed;
  z-index: 200;
  bottom: calc(var(--player-space) - 34px);
  left: 50%;
  max-width: min(420px, calc(100vw - 32px));
  border: 1px solid rgba(248, 239, 223, 0.13);
  border-radius: 9px;
  padding: 9px 14px;
  color: #faf2e4;
  background: rgba(19, 50, 42, 0.96);
  box-shadow: 0 9px 26px rgba(9, 25, 19, 0.19);
  font-size: 11px;
  line-height: 1.5;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.noscript {
  position: fixed;
  z-index: 300;
  right: 16px;
  bottom: 16px;
  left: 16px;
  border-radius: 12px;
  padding: 13px;
  color: #fff;
  background: #8d3521;
  text-align: center;
}

/* ---------------------------------------------------------
   Animation
   --------------------------------------------------------- */

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes menu-in {
  from {
    opacity: 0;
    transform: translateY(4px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes dialog-in {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes drawer-in {
  from {
    opacity: 0.4;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes shimmer {
  from {
    background-position: 200% 0;
  }
  to {
    background-position: -200% 0;
  }
}

@keyframes eq {
  from {
    transform: scaleY(0.45);
  }
  to {
    transform: scaleY(1);
  }
}

@keyframes record-wave {
  from {
    transform: scaleY(0.5);
    opacity: 0.68;
  }
  to {
    transform: scaleY(1.2);
    opacity: 1;
  }
}

@keyframes record-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(223, 97, 57, 0.22);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(223, 97, 57, 0);
  }
}

/* ---------------------------------------------------------
   Responsive
   --------------------------------------------------------- */

@media (max-width: 1180px) {
  .shell {
    padding: 0 25px;
  }

  .art-note {
    left: -25px;
  }

  .player-inner {
    grid-template-columns: minmax(200px, 255px) minmax(330px, 1fr) minmax(165px, 200px);
    gap: 18px;
    padding-right: 25px;
    padding-left: 25px;
  }

  .volume-slider {
    width: 45px;
  }
}

@media (max-width: 1020px) {
  .header-inner {
    gap: 28px;
  }

  .hero-copy h1 {
    font-size: clamp(42px, 5.2vw, 58px);
  }

  .art-note {
    display: none;
  }

  .transcript-card {
    padding-right: 22px;
    padding-left: 22px;
  }

  .transcript-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 11px;
  }

  .transcript-toggles {
    padding-bottom: 0;
  }

  .transcript-subhead {
    margin-top: 9px;
  }

  .toggle {
    padding-left: 0;
  }

  .sentence {
    grid-template-columns: 40px minmax(0, 1fr) 57px;
    gap: 9px;
    padding-right: 4px;
  }

  .sentence-en {
    font-size: 18px;
  }

  .phrase-grid {
    grid-template-columns: 1fr;
  }

  .phrase-card {
    min-height: 0;
  }

  .phrase-example {
    margin-top: 12px;
  }

  .player-inner {
    grid-template-columns: minmax(185px, 230px) minmax(300px, 1fr) minmax(145px, 178px);
    gap: 13px;
  }

  .volume-slider {
    width: 0;
    opacity: 0;
    pointer-events: none;
  }

  .speed-button {
    padding-left: 6px;
  }
}

@media (max-width: 880px) {
  body {
    --player-space: 180px;
  }

  .hero-copy {
    max-width: 720px;
  }

  .hero-copy h1 {
    font-size: clamp(43px, 7vw, 61px);
  }

  .hero-art {
    justify-self: start;
    width: min(100%, 560px);
  }

  .cover-frame {
    aspect-ratio: 760 / 500;
  }

  .transcript-head {
    flex-direction: row;
    align-items: flex-end;
  }

  .transcript-card {
    --reader-height: clamp(360px, 60vh, 520px);
  }

  .tip-card {
    min-height: 100%;
    padding: 27px 23px 21px;
  }

  .tip-card h2 {
    font-size: 25px;
  }

  .player-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "track extra"
      "center center";
    gap: 4px 16px;
    width: 100%;
    padding: 9px 22px 11px;
  }

  .player-track {
    grid-area: track;
  }

  .player-center {
    grid-area: center;
  }

  .player-extra {
    grid-area: extra;
    align-self: center;
  }

  .player-controls {
    height: 44px;
    margin-top: -1px;
  }

  .player-timeline {
    height: 17px;
  }

  .player-cover {
    width: 42px;
    height: 42px;
  }

  .player-title {
    font-size: 13px;
  }

  .player-icon--loop {
    display: grid;
  }

  .volume-control {
    display: none;
  }

  .player-subtitle {
    display: none;
  }

  .player-kicker {
    font-size: 7px;
  }

  .toast {
    bottom: calc(var(--player-space) - 40px);
  }
}

@media (max-width: 640px) {
  body {
    --player-space: 173px;
  }

  .shell {
    padding: 0 16px;
  }

  .header-inner {
    height: 64px;
    gap: 15px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .brand-word {
    font-size: 23px;
  }

  .brand-cn {
    display: none;
  }

  .local-badge {
    display: none;
  }

  .header-actions {
    gap: 8px;
  }

  .header-icon-btn {
    padding: 7px;
    border-color: transparent;
    background: transparent;
  }

  .header-icon-btn span {
    display: none;
  }

  .eyebrow {
    gap: 7px;
    margin-bottom: 18px;
    font-size: 8px;
  }

  .eyebrow-rule {
    width: 19px;
  }

  .hero-copy h1 {
    font-size: clamp(37px, 10.5vw, 47px);
    letter-spacing: -0.037em;
    line-height: 1.01;
  }

  .hero-title-zh {
    margin-top: 13px;
    font-size: 15px;
  }

  .hero-summary {
    margin-top: 16px;
  }

  .hero-summary > p:first-child {
    font-size: 14px;
  }

  .hero-summary-zh {
    font-size: 11.5px;
  }

  .lesson-meta {
    gap: 8px 11px;
    margin-top: 19px;
  }

  .meta-pill {
    padding: 4px 8px;
    font-size: 8px;
  }

  .meta-item {
    font-size: 10.5px;
  }

  .hero-actions {
    margin-top: 22px;
  }

  .btn {
    min-height: 42px;
    padding: 10px 16px;
    font-size: 11.5px;
  }

  .hero-progress {
    margin-top: 21px;
  }

  .hero-art {
    width: 100%;
  }

  .cover-frame {
    aspect-ratio: 760 / 460;
    border-width: 4px;
    border-radius: 21px;
  }

  .cover-backdrop {
    top: 12px;
    right: -7px;
    bottom: -8px;
    left: 12px;
    border-radius: 23px;
  }

  .cover-stamp {
    right: 11px;
    bottom: 11px;
    min-width: 88px;
    padding: 6px 9px;
  }

  .cover-stamp-top {
    font-size: 9px;
  }

  .cover-stamp-bottom {
    font-size: 6px;
  }

  .transcript-card {
    --reader-height: clamp(320px, 56vh, 470px);
    border-radius: 21px;
    padding: 20px 13px 13px;
  }

  .transcript-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 0 4px;
  }

  .transcript-head h2,
  .section-title-row h2 {
    font-size: 26px;
  }

  .transcript-toggles {
    margin-left: -9px;
  }

  .transcript-subhead {
    margin-top: 3px;
    padding: 10px 4px 9px;
  }

  .transcript-subhead p {
    font-size: 10px;
  }

  .keyboard-hint {
    display: none;
  }

  .transcript-list {
    height: 100%;
    overflow-y: auto;
    margin: 0;
    padding: 0 4px 6px 0;
  }

  .sentence {
    grid-template-columns: 34px minmax(0, 1fr) 28px;
    gap: 6px;
    padding: 13px 2px 13px 4px;
  }

  .sentence:not(:last-child)::after {
    right: 3px;
    left: 44px;
  }

  .sentence-time {
    padding-left: 1px;
    font-size: 8px;
  }

  .sentence-time .mini-play {
    width: 10px;
    height: 10px;
  }

  .sentence-en {
    font-size: 17px;
    line-height: 1.5;
  }

  .sentence-zh {
    font-size: 11px;
    line-height: 1.65;
  }

  .sentence-actions {
    flex-direction: column;
    gap: 0;
    opacity: 1;
    transform: none;
  }

  .sentence-action {
    width: 25px;
    height: 25px;
  }

  .sentence-action .icon {
    width: 12px;
    height: 12px;
  }

  .sentence-action.is-recorded::after {
    margin: 14px 0 0 15px;
  }

  .practice-panel {
    margin: 12px 0 11px;
    border-radius: 16px;
    padding: 17px 15px 12px;
  }

  .practice-head h3 {
    font-size: 20px;
  }

  .practice-counter {
    display: none;
  }

  .practice-body {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 16px 0 13px;
  }

  .practice-en {
    font-size: 18.5px;
  }

  .practice-zh {
    font-size: 10.5px;
  }

  .practice-copy {
    min-height: 0;
  }

  .record-visual {
    margin-bottom: 5px;
  }

  .practice-footer {
    padding-top: 9px;
  }

  .practice-tip {
    display: none;
  }

  .word-section,
  .phrase-section {
    margin-top: 28px;
  }

  .section-title-row {
    margin-bottom: 12px;
  }

  .phrase-card {
    padding: 15px 15px 14px;
  }

  .tip-card {
    padding: 23px 20px 18px;
  }

  .tip-card h2 {
    margin-top: 12px;
    font-size: 24px;
  }

  .page-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
    margin-top: 32px;
    padding: 19px 2px 26px;
  }

  .player-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2px 10px;
    padding: 8px 13px 9px;
  }

  .player-cover {
    width: 38px;
    height: 38px;
    border-radius: 8px;
  }

  .player-track {
    gap: 9px;
  }

  .player-kicker {
    display: none;
  }

  .player-title {
    font-size: 12.5px;
  }

  .player-controls {
    height: 42px;
    gap: 3px;
  }

  .player-icon {
    width: 30px;
    height: 30px;
  }

  .player-icon .icon {
    width: 16px;
    height: 16px;
  }

  .player-icon--skip .icon {
    width: 20px;
    height: 20px;
  }

  .play-button {
    width: 43px;
    height: 43px;
    margin: 0 3px;
  }

  .play-button .icon {
    width: 18px;
    height: 18px;
  }

  .player-timeline {
    gap: 7px;
  }

  .time-label {
    flex-basis: 29px;
    font-size: 7.5px;
  }

  .player-extra {
    gap: 2px;
  }

  .speed-button {
    height: 25px;
    padding: 0 5px;
    font-size: 8px;
  }

  .player-icon--loop {
    width: 26px;
    height: 26px;
  }

  .player-icon--loop .icon {
    width: 15px;
    height: 15px;
  }

  .player-icon--loop.is-active::after {
    margin-top: 21px;
  }

  .volume-control {
    display: none;
  }

  .shortcuts-dialog {
    padding: 22px 18px 19px;
    border-radius: 19px;
  }

  .history-dialog {
    width: 100vw;
    border-left: 0;
  }

  .history-head {
    padding: 20px 18px 15px;
  }

  .history-toolbar {
    padding: 12px 18px 6px;
  }

  .history-list {
    padding: 4px 10px 14px;
  }

  .history-note {
    padding-right: 18px;
    padding-left: 18px;
  }

  .dialog-head h2 {
    font-size: 24px;
  }

  .shortcut-grid {
    grid-template-columns: 1fr;
  }

  .shortcut-grid > div {
    min-height: 42px;
  }

  .toast {
    bottom: calc(var(--player-space) - 32px);
  }
}

@media (max-width: 390px) {
  .brand-word {
    font-size: 21px;
  }

  .header-icon-btn {
    display: none;
  }

  .history-entry {
    display: inline-flex;
  }

  .hero-copy h1 {
    font-size: 35px;
  }

  .sentence {
    grid-template-columns: 31px minmax(0, 1fr) 25px;
  }

  .sentence-en {
    font-size: 16.5px;
  }

  .practice-btn,
  .record-button {
    font-size: 9.5px;
    padding-right: 8px;
    padding-left: 8px;
  }

  .player-title {
    font-size: 12px;
  }

  .player-icon {
    width: 28px;
    height: 28px;
  }

  .play-button {
    width: 41px;
    height: 41px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------------------------------------------------------
   Browse / Focus views
   --------------------------------------------------------- */

.view[hidden] {
  display: none !important;
}

.browse-intro {
  padding: 36px 0 18px;
}

.browse-intro h1 {
  font-family: var(--serif);
  font-size: clamp(36px, 4.4vw, 56px);
  letter-spacing: -0.04em;
  line-height: 1.02;
}

.browse-intro-note {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.category-section {
  margin-top: 16px;
}

.category-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.category-toolbar h2 {
  margin-top: 4px;
  font-size: 24px;
}

.category-difficulty {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--muted);
  font-size: 13px;
}

.category-difficulty > span {
  flex-shrink: 0;
}

.category-difficulty .playlist-filter-chips {
  gap: 6px;
}

.category-difficulty .filter-chip {
  padding: 8px 19px;
  color: var(--ink-soft);
  background: var(--surface);
  font-size: 13px;
}

.category-difficulty .filter-chip.is-active {
  color: var(--cream);
  background: var(--forest);
}

.category-status {
  margin: 14px 0 20px;
  color: var(--muted);
  font-size: 13px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.category-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 236px;
  aspect-ratio: 1.12;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
  color: var(--forest);
  background: #e7ece3;
  box-shadow: var(--shadow-card);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.category-card:nth-child(4n + 2) {
  background: #f4e6d8;
}

.category-card:nth-child(4n + 3) {
  background: #e5ebed;
}

.category-card:nth-child(4n + 4) {
  background: #ede7ef;
}

.category-card:hover {
  transform: translateY(-4px);
  border-color: #a5b3a6;
  box-shadow: var(--shadow-soft);
}

.category-card-top,
.category-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.category-card-top > .icon {
  width: 40px;
  height: 40px;
  border-radius: 13px;
  padding: 9px;
  background: rgba(255, 253, 248, 0.65);
}

.category-card-index {
  opacity: 0.6;
  font-family: var(--mono);
  font-size: 12px;
}

.category-card-name {
  margin: 24px 0;
  font-size: clamp(21px, 2vw, 27px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.category-card-footer {
  margin-top: auto;
  font-size: 12px;
}

.category-card-footer .icon {
  width: 18px;
  height: 18px;
}

.featured-heading {
  margin-top: 48px;
  margin-bottom: 18px;
}

.view--library .browse-intro {
  padding: 24px 0 16px;
}

.view--library .browse-intro .eyebrow {
  margin-bottom: 12px;
}

.view--library .browse-intro h1 {
  font-size: clamp(28px, 3.5vw, 42px);
  line-height: 1.15;
}

.view--library .browse-intro-note {
  margin-top: 8px;
  font-size: 13px;
}

.library-toolbar {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin: 4px 0 26px;
}

.library-toolbar .playlist-search-input {
  padding: 12px 44px 12px 42px;
  border-color: var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  font-size: 15px;
}

.library-toolbar .playlist-search-icon {
  left: 16px;
  width: 18px;
  height: 18px;
}

.library-toolbar .playlist-search-clear {
  right: 11px;
  width: 26px;
  height: 26px;
}

.library-toolbar .playlist-search-clear .icon {
  width: 13px;
  height: 13px;
}

.library-toolbar .playlist-filter-row {
  gap: 10px;
}

.library-toolbar .filter-chip {
  padding: 5px 12px;
  font-size: 12px;
}

.featured-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
  gap: 36px;
  align-items: center;
  border: 1px solid rgba(217, 210, 197, 0.85);
  border-radius: var(--radius-lg);
  padding: 30px 32px;
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.featured-copy h2 {
  max-width: 680px;
  margin-top: 10px;
  font-family: var(--serif);
  font-size: clamp(30px, 3.4vw, 47px);
  letter-spacing: -0.04em;
  line-height: 1.02;
  text-wrap: balance;
}

.featured-title-zh {
  margin-top: 10px;
  color: #5d685f;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0.06em;
}

.featured-summary {
  max-width: 580px;
  margin-top: 14px;
}

.featured-summary > p:first-child {
  color: #405047;
  font-size: 14px;
  line-height: 1.62;
}

.featured-card .lesson-meta {
  margin-top: 16px;
}

.featured-card .hero-actions {
  margin-top: 20px;
}

.featured-art {
  position: relative;
  justify-self: end;
  width: min(100%, 360px);
}

.featured-art img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  aspect-ratio: 760 / 640;
  border: 5px solid rgba(255, 252, 246, 0.68);
  border-radius: 27px;
  background: var(--paper-deep);
  object-fit: cover;
  box-shadow: 0 21px 50px rgba(57, 42, 26, 0.17);
  transform: rotate(-0.6deg);
}

.library-section {
  margin-top: 32px;
}

.library-section .section-title-row {
  margin-bottom: 14px;
}

.episode-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.episode-grid .playlist-empty {
  grid-column: 1 / -1;
}

.browse-tip {
  max-width: 380px;
  margin-top: 34px;
}

.focus-bar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 11px 0;
  background: rgba(244, 241, 233, 0.94);
  backdrop-filter: blur(12px);
}

.focus-bar .text-button {
  gap: 6px;
  color: var(--muted);
  font-size: 12.5px;
}

.focus-bar .text-button:hover {
  color: var(--ink);
}

.focus-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.13fr) minmax(310px, 0.72fr);
  gap: 66px;
  align-items: center;
  padding: 34px 0 42px;
}

.focus-hero .hero-actions {
  margin-top: 24px;
}

.player-track {
  border: 0;
  padding: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.player-track:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 12px;
}

@media (max-width: 1180px) {
  .focus-hero {
    gap: 42px;
  }
}

@media (max-width: 1020px) {
  .category-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .featured-card {
    grid-template-columns: minmax(0, 1fr) minmax(220px, 0.5fr);
    gap: 26px;
    padding: 24px 26px;
  }

  .focus-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(275px, 0.75fr);
    gap: 35px;
    padding-top: 30px;
  }

  .episode-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 880px) {
  .featured-card {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .featured-art {
    justify-self: start;
    width: min(100%, 460px);
  }

  .focus-hero {
    grid-template-columns: 1fr;
    gap: 33px;
    padding: 30px 0 34px;
  }

  .focus-hero .hero-art {
    justify-self: start;
    width: min(100%, 560px);
  }
}

@media (max-width: 640px) {
  .category-toolbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }

  .category-difficulty {
    flex-wrap: wrap;
    gap: 10px;
  }

  .category-difficulty .filter-chip {
    padding: 7px 14px;
  }

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

  .category-card {
    min-height: 202px;
    aspect-ratio: auto;
    border-radius: 21px;
    padding: 18px;
  }

  .category-card-name {
    margin: 20px 0;
    font-size: 21px;
  }

  .featured-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    margin-top: 34px;
  }

  .browse-intro {
    padding-top: 26px;
  }

  .browse-intro h1 {
    font-size: clamp(32px, 10vw, 42px);
  }

  .featured-card {
    padding: 20px;
    border-radius: 21px;
  }

  .featured-copy h2 {
    font-size: clamp(27px, 8.4vw, 36px);
  }

  .episode-grid {
    grid-template-columns: 1fr;
  }

  .browse-tip {
    max-width: none;
  }

  .focus-bar .text-button {
    font-size: 11.5px;
  }
}