/* Library-specific styles. Base tokens/header/drawer come from styles.css. */
.library-page {
  background:
    radial-gradient(980px 520px at 84% -8%, rgba(221, 96, 58, .10), transparent 62%),
    radial-gradient(760px 420px at -5% 18%, rgba(46, 139, 104, .07), transparent 58%),
    var(--paper);
}
.lib-shell { min-height: 100vh; }
.lib-header .header-inner { gap: 26px; }
.lib-search {
  flex: 1;
  max-width: 410px;
  height: 38px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 253, 247, .66);
  color: var(--muted);
  transition: border-color .2s ease, background .2s ease;
}
.lib-search:focus-within { border-color: var(--line-strong); background: var(--surface); }
.lib-search .ic { width: 14px; height: 14px; }
.lib-search input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-size: 12px;
}
.lib-search input::placeholder { color: var(--muted-light); }
.lib-search kbd {
  display: inline-flex;
  align-items: center;
  height: 20px;
  padding: 0 5px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--muted-light);
  font-family: var(--mono);
  font-size: 8px;
  background: var(--surface-2);
}
.lib-featured-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.access-link { color: var(--accent-deep); border: 1px solid rgba(193, 102, 62, .24); background: rgba(255, 247, 237, .72); }
.access-link:hover { border-color: rgba(193, 102, 62, .45); background: var(--accent-soft); }
.access-link .ic { width: 13px; height: 13px; }
.access-link.is-unlocked { color: var(--green-deep); border-color: rgba(44, 122, 84, .24); background: var(--green-soft); }
.access-link.is-unlocked .ic { fill: currentColor; }
.lib-main { max-width: var(--max); margin: 0 auto; padding: 0 40px 90px; }

/* Hero */
.lib-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, .7fr);
  gap: 64px;
  align-items: center;
  padding: 62px 0 52px;
  min-width: 0;
}
.lib-hero > * { min-width: 0; }
.lib-hero-copy { animation: fadeUp .7s cubic-bezier(.2,.75,.25,1) both; min-width: 0; }
.lib-hero h1 {
  margin-top: 19px;
  font-size: clamp(45px, 5.2vw, 70px);
  line-height: 1.01;
  letter-spacing: -.045em;
}
.lib-hero h1 em { font-family: var(--serif); color: var(--accent); font-weight: 400; font-style: italic; }
.lib-deck {
  max-width: 620px;
  margin-top: 20px;
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.9;
}
.lib-stats { display: flex; gap: 28px; margin-top: 27px; flex-wrap: wrap; }
.lib-stats > div { display: flex; flex-direction: column; gap: 2px; }
.lib-stats strong { font-size: 23px; font-weight: 500; letter-spacing: -.035em; line-height: 1.1; }
.lib-stats span { font-size: 9.5px; color: var(--muted); letter-spacing: .04em; }
.lib-stats > div + div { padding-left: 28px; border-left: 1px solid var(--line); }
.continue-card {
  position: relative;
  padding: 24px;
  min-height: 280px;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface);
  box-shadow: var(--shadow-md);
  transform: rotate(.7deg);
  animation: fadeUp .8s .1s cubic-bezier(.2,.75,.25,1) both;
}
.continue-card::before {
  content: "";
  position: absolute;
  width: 72px;
  height: 20px;
  top: -10px;
  right: 28px;
  background: rgba(255, 240, 184, .86);
  border: 1px solid rgba(211, 179, 91, .26);
  transform: rotate(3deg);
}
.continue-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.continue-top .ic { width: 15px; height: 15px; color: var(--muted); }
.continue-empty { padding: 37px 9px 15px; }
.continue-mark {
  display: block;
  height: 27px;
  font-family: var(--serif);
  font-size: 50px;
  line-height: .8;
  color: var(--orange-mark);
}
.continue-empty p {
  margin-top: 12px;
  font-family: var(--serif);
  font-size: 25px;
  line-height: 1.25;
  letter-spacing: -.015em;
}
.continue-empty p em { color: var(--accent); }
.continue-note { display: block; margin-top: 18px; color: var(--muted); font-size: 10.5px; line-height: 1.6; }
.continue-live { display: flex; gap: 13px; align-items: center; margin-top: 25px; }
.continue-live[hidden] { display: none; }
.continue-thumb { width: 112px; height: 76px; flex: 0 0 auto; border-radius: 10px; overflow: hidden; background: var(--surface-2); }
.continue-thumb img { width: 100%; height: 100%; object-fit: cover; }
.continue-info { min-width: 0; }
.continue-level { font-size: 8px; letter-spacing: .1em; color: var(--accent-deep); font-weight: 700; }
.continue-info h3 { margin-top: 4px; font-size: 14px; line-height: 1.3; font-weight: 600; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; text-wrap: balance; }
.continue-info p { margin-top: 4px; color: var(--muted); font-size: 10px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mini-progress { height: 3px; margin-top: 10px; border-radius: 99px; background: var(--surface-3); overflow: hidden; }
.mini-progress i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: inherit; }

/* Catalog */
.lib-catalog { padding-top: 22px; }
.catalog-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 25px; margin-bottom: 24px; }
.catalog-head h2 { margin-top: 7px; font-size: clamp(27px, 3vw, 39px); line-height: 1.1; letter-spacing: -.035em; font-weight: 500; }
.catalog-result { color: var(--muted); font-size: 11px; white-space: nowrap; padding-bottom: 5px; }
.catalog-result b { color: var(--ink); font-weight: 600; font-size: 15px; }
.filter-panel {
  padding: 16px 18px 13px;
  margin-bottom: 24px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: rgba(255, 253, 247, .58);
}
.filter-row { display: flex; align-items: flex-start; gap: 15px; }
.filter-row + .filter-row { margin-top: 11px; padding-top: 11px; border-top: 1px solid rgba(230,220,203,.7); }
.filter-label { flex: 0 0 31px; padding-top: 6px; color: var(--muted); font-size: 9.5px; letter-spacing: .08em; }
.filter-chips { display: flex; align-items: center; flex-wrap: wrap; gap: 5px; }
.filter-chip {
  height: 28px;
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-size: 10.5px;
  transition: all .18s ease;
}
.filter-chip:hover { color: var(--ink); background: var(--surface-2); }
.filter-chip.is-active { color: var(--ink); background: var(--surface); border-color: var(--line-strong); box-shadow: 0 1px 2px rgba(50,40,20,.04); }
.level-dot { width: 5px; height: 5px; border-radius: 50%; display: inline-block; }
.level-dot.a2 { background: #78a88a; }
.level-dot.b1 { background: #7d9db0; }
.level-dot.b2 { background: #d99a51; }
.level-dot.c1 { background: #6e6559; }
.sort-wrap { margin-left: auto; display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 9.5px; }
.sort-wrap select {
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 10px;
  padding: 0 6px;
  outline: 0;
  cursor: pointer;
}

/* speaking knowledge teaser */
.lib-topics { padding: 4px 0 34px; }
.lib-topics-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 15px; }
.lib-topics-head h2 { margin-top: 6px; font-size: clamp(24px, 2.6vw, 32px); font-weight: 500; letter-spacing: -.035em; }
.lib-topics-head .text-link { padding-bottom: 4px; font-size: 10px; }
.lib-topics-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.topic-mini {
  min-width: 0;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.topic-mini:hover { transform: translateY(-2px); border-color: var(--line-strong); background: var(--surface-2); }
.topic-mini-num { display: block; font-family: var(--mono); color: var(--accent); font-size: 9px; letter-spacing: .06em; }
.topic-mini-cat { display: block; margin-top: 8px; color: var(--muted); font-size: 8.5px; letter-spacing: .04em; }
.topic-mini strong { display: block; margin-top: 4px; color: var(--ink); font-size: 13px; line-height: 1.4; font-weight: 600; letter-spacing: -.015em; }
.topic-mini > span:last-child { display: block; margin-top: 5px; color: var(--muted); font-size: 9.5px; line-height: 1.55; }

.free-trial-strip {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 17px;
  padding: 11px 14px;
  border: 1px solid rgba(46, 139, 104, .22);
  border-radius: 10px;
  background: linear-gradient(90deg, rgba(231, 245, 237, .8), rgba(255, 253, 247, .7));
  color: var(--ink-soft);
  transition: border-color .18s ease, background .18s ease;
}
.free-trial-strip:hover { border-color: rgba(46, 139, 104, .45); background: var(--green-soft); }
.free-trial-badge { flex: 0 0 auto; display: inline-flex; align-items: center; height: 22px; padding: 0 7px; border-radius: 4px; background: var(--green); color: #f5fff9; font-size: 8.5px; font-weight: 600; }
.free-trial-copy { min-width: 0; display: flex; align-items: baseline; gap: 9px; flex-wrap: wrap; }
.free-trial-copy b { color: var(--ink); font-size: 11px; font-weight: 600; }
.free-trial-copy span { color: var(--muted); font-size: 9.5px; }
.free-trial-go { margin-left: auto; flex: 0 0 auto; display: inline-flex; align-items: center; gap: 4px; color: var(--green-deep); font-size: 9.5px; font-weight: 600; }
.free-trial-go .ic { width: 12px; height: 12px; }

/* Cards */
.course-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 19px; }
.course-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--surface);
  cursor: pointer;
  transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease;
  animation: fadeUp .5s both;
}
.course-card:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: 0 20px 45px rgba(54,43,23,.11); }
.course-visual {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--surface-3);
}
.course-visual img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s cubic-bezier(.2,.75,.25,1); }
.course-card:hover .course-visual img { transform: scale(1.045); }
.course-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(18,20,16,.44), transparent 44%);
  pointer-events: none;
}
.course-level {
  position: absolute;
  left: 11px;
  bottom: 10px;
  z-index: 2;
  height: 21px;
  display: inline-flex;
  align-items: center;
  padding: 0 7px;
  border-radius: 5px;
  background: rgba(17,23,18,.72);
  color: #fbf7ea;
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: .06em;
  backdrop-filter: blur(5px);
}
.course-level.a2 { background: rgba(54, 110, 76, .84); }
.course-level.b1 { background: rgba(55, 94, 112, .84); }
.course-level.b2 { background: rgba(177, 104, 45, .88); }
.course-level.c1 { background: rgba(58, 51, 43, .86); }
.course-duration {
  position: absolute;
  right: 10px;
  bottom: 10px;
  z-index: 2;
  height: 21px;
  display: inline-flex;
  align-items: center;
  padding: 0 7px;
  border-radius: 5px;
  background: rgba(17,18,14,.67);
  color: rgba(255,255,255,.9);
  font-family: var(--mono);
  font-size: 8.5px;
  backdrop-filter: blur(5px);
}
.course-free {
  position: absolute;
  left: 10px;
  top: 10px;
  z-index: 3;
  height: 22px;
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
  border-radius: 5px;
  background: rgba(46, 139, 104, .92);
  color: #f4fff8;
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: .03em;
  box-shadow: 0 4px 10px rgba(18, 54, 38, .22);
  backdrop-filter: blur(5px);
}
.course-fav {
  position: absolute;
  right: 9px;
  top: 9px;
  z-index: 3;
  width: 29px;
  height: 29px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 50%;
  background: rgba(20,22,17,.34);
  color: rgba(255,255,255,.9);
  backdrop-filter: blur(5px);
  opacity: 0;
  transition: opacity .2s ease, background .2s ease;
}
.course-card:hover .course-fav, .course-fav.is-saved { opacity: 1; }
.course-fav.is-saved { color: #f5b695; background: rgba(20,22,17,.52); }
.course-fav.is-saved .ic { fill: currentColor; }
.course-fav .ic { width: 13px; height: 13px; }
.course-body { padding: 15px 15px 13px; }
.course-channel { display: flex; align-items: center; justify-content: space-between; gap: 8px; color: var(--muted); font-size: 8.5px; letter-spacing: .05em; text-transform: uppercase; }
.course-channel span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.course-topic { color: var(--accent-deep); font-weight: 600; letter-spacing: .02em; text-transform: none; font-size: 8.5px; }
.course-title {
  margin-top: 6px;
  font-size: 15px;
  line-height: 1.38;
  font-weight: 600;
  letter-spacing: -.012em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 41px;
  text-wrap: balance;
}
.course-title-zh { margin-top: 4px; color: var(--muted); font-size: 10.5px; line-height: 1.45; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.course-title-en { margin-top: 5px; color: var(--muted); font-size: 9.5px; line-height: 1.4; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-family: var(--mono); letter-spacing: -.01em; opacity: .82; }
.course-arrow { color: var(--muted-light); display: inline-flex; }
.course-arrow .ic { width: 12px; height: 12px; }
.course-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); }
.course-meta { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 8.5px; }
.course-meta span { display: inline-flex; align-items: center; gap: 3px; white-space: nowrap; }
.course-meta .ic { width: 10px; height: 10px; }
.course-progress { height: 2px; margin-top: 9px; border-radius: 99px; background: var(--surface-3); overflow: hidden; }
.course-progress i { display: block; height: 100%; background: var(--green); border-radius: inherit; }
.course-empty { padding: 80px 20px; text-align: center; border: 1px dashed var(--line-strong); border-radius: 20px; color: var(--muted); }
.course-empty[hidden] { display: none; }
.empty-symbol { display: block; color: var(--line-strong); font-family: var(--serif); font-size: 46px; line-height: .8; }
.course-empty strong { display: block; margin-top: 15px; color: var(--ink-soft); font-size: 15px; font-weight: 500; }
.course-empty p { margin-top: 5px; font-size: 11px; }
.course-empty .btn { margin-top: 15px; }

/* bottom note */
.lib-note {
  margin-top: 76px;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 50px;
  align-items: end;
  padding: 42px 46px;
  border-radius: 25px;
  background: #202820;
  color: #f8f2e5;
}
.lib-note h2 { margin-top: 10px; font-family: var(--serif); font-size: clamp(31px, 3.6vw, 48px); line-height: 1.05; font-weight: 400; letter-spacing: -.02em; }
.lib-note h2 em { color: #efaf88; }
.lib-note-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.lib-note-steps > div { border-left: 1px solid rgba(255,255,255,.14); padding-left: 14px; }
.lib-note-steps span { font-family: var(--mono); color: rgba(255,255,255,.46); font-size: 8px; }
.lib-note-steps b { display: block; margin-top: 8px; font-size: 11.5px; font-weight: 500; }
.lib-note-steps p { margin-top: 5px; color: rgba(255,255,255,.52); font-size: 9.5px; line-height: 1.6; }

@media (max-width: 1100px) {
  .lib-hero { grid-template-columns: 1fr; gap: 28px; padding-top: 46px; }
  .continue-card { max-width: 560px; min-height: 0; transform: none; }
  .continue-empty { padding-top: 25px; }
  .course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lib-search { max-width: 300px; }
}
@media (max-width: 820px) {
  .lib-main { padding-left: 20px; padding-right: 20px; }
  .lib-header .header-inner { height: auto; min-height: 66px; flex-wrap: wrap; gap: 10px; padding: 10px 20px; }
  .lib-search { order: 3; flex: 0 0 100%; max-width: none; margin: 0; height: 35px; }
  .lib-search kbd { display: none; }
  .lib-header .header-tools { margin-left: auto; }
  .lib-header .nav-bookmark span { display: none; }
  .lib-header .access-link span { display: inline; }
  .lib-header .access-link { padding: 0 8px; }
  .lib-header .nav-bookmark { padding: 0 9px; }
  .lib-hero { padding: 35px 0 36px; }
  .lib-hero h1 { font-size: clamp(38px, 9vw, 52px); }
  .lib-deck { font-size: 13px; }
  .lib-stats { gap: 15px; margin-top: 21px; }
  .lib-stats strong { font-size: 19px; }
  .lib-stats > div + div { padding-left: 15px; }
  .lib-stats span { font-size: 8.5px; }
  .continue-card { padding: 19px; border-radius: 20px; }
  .continue-empty p { font-size: 21px; }
  .catalog-head { flex-direction: column; align-items: flex-start; gap: 7px; margin-bottom: 18px; }
  .catalog-head h2 { font-size: 27px; }
  .filter-panel { padding: 12px 11px 11px; }
  .filter-row { flex-direction: column; gap: 6px; }
  .filter-row + .filter-row { margin-top: 8px; padding-top: 8px; }
  .filter-label { padding-top: 0; }
  .filter-chips { max-width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 2px; scrollbar-width: none; }
  .filter-chips::-webkit-scrollbar { display: none; }
  .filter-chip { flex: 0 0 auto; }
  .sort-wrap { margin-left: 0; }
  .course-grid { grid-template-columns: 1fr; gap: 13px; }
  .course-fav { opacity: 1; }
  .course-title { font-size: 16px; }
  .lib-note { grid-template-columns: 1fr; gap: 28px; padding: 28px 22px; margin-top: 52px; border-radius: 20px; }
  .lib-note-steps { gap: 10px; }
  .lib-note-steps p { font-size: 9px; }
  .lib-topics { padding-bottom: 26px; }
  .lib-topics-head { flex-direction: column; align-items: flex-start; gap: 4px; }
  .lib-topics-grid { grid-template-columns: 1fr; gap: 7px; }
  .topic-mini { padding: 12px 13px; }
  .free-trial-strip { flex-wrap: wrap; gap: 8px 10px; }
  .free-trial-copy { display: block; flex: 1 1 210px; }
  .free-trial-copy b, .free-trial-copy span { display: block; }
  .free-trial-copy span { margin-top: 2px; }
  .free-trial-go { margin-left: 0; }
}
@media (max-width: 520px) {
  .lib-header .featured-link { display: none; }
  .lib-hero h1 { font-size: 36px; }
  .continue-info h3 { font-size: 13px; line-height: 1.35; }
  .lib-stats > div:nth-child(2) { display: none; }
  .lib-stats > div:nth-child(4) { padding-left: 15px; border-left: 1px solid var(--line); }
  .continue-card { min-height: 0; }
  .lib-note-steps { grid-template-columns: 1fr; gap: 12px; }
  .lib-note-steps > div { padding-left: 12px; }
}
[hidden] { display: none !important; }