:root {
  color-scheme: light;
  --ink: #172026;
  --muted: #5f6b73;
  --line: #e5e8eb;
  --bg: #f6f7f8;
  --panel: #ffffff;
  --accent: #0f766e;
  --accentText: #0b5f59;
  --soft: #e8f3f1;
  --warm: #fff7ed;
  --warn: #b45309;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Segoe UI", sans-serif;
}
button, input, select {
  font: inherit;
}
button, a {
  -webkit-tap-highlight-color: transparent;
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--line);
  background: rgba(246, 247, 248, .96);
  backdrop-filter: blur(12px);
}
.topbarInner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 22px 14px;
}
.backLink {
  display: inline-flex;
  margin-bottom: 9px;
  color: var(--accentText);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}
h1 {
  margin: 0 0 7px;
  font-size: 25px;
  line-height: 1.25;
  letter-spacing: 0;
}
.lead {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}
.searchRow {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 180px auto;
  gap: 10px;
  align-items: center;
}
input[type="search"], select {
  width: 100%;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: #fff;
  color: var(--ink);
  outline: none;
}
input[type="search"]:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--soft);
}
button {
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}
button:hover, a.toolLink:hover {
  border-color: #b9d8d4;
  background: #fbfdfc;
}
.modeRow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
.mode.active, #favoritesOnly.active {
  border-color: #a7d5ce;
  background: var(--soft);
  color: var(--accentText);
  font-weight: 800;
}
.statusRow {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 9px;
  color: var(--muted);
  font-size: 13px;
}
main {
  max-width: 1280px;
  margin: 18px auto 54px;
  padding: 0 22px;
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.chip {
  height: 34px;
  border-radius: 999px;
  font-size: 14px;
}
.chip.active {
  border-color: #a7d5ce;
  background: var(--soft);
  color: var(--accentText);
  font-weight: 800;
}
.termGrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.termCard {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: 0 12px 32px rgba(15, 23, 42, .05);
}
.termTop {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: start;
}
.termName {
  margin: 0;
  font-size: 22px;
  line-height: 1.2;
}
.categoryBadge {
  color: var(--accentText);
  font-size: 13px;
  font-weight: 800;
}
.brief {
  margin: 7px 0 0;
  color: var(--muted);
  line-height: 1.65;
}
.star {
  width: 38px;
  min-width: 38px;
  padding: 0;
  border-radius: 50%;
  font-size: 18px;
}
.star.active {
  border-color: #f4c27a;
  background: var(--warm);
  color: var(--warn);
}
.metaLine {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 8px;
  font-size: 14px;
  line-height: 1.55;
}
.metaLine strong {
  color: var(--muted);
}
.cardActions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.cardActions button, .cardActions a, .modalActions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 11px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
}
.cardActions .primary, .modalActions button:first-child {
  border-color: #a7d5ce;
  background: var(--soft);
  color: var(--accentText);
  font-weight: 800;
}
.hidden {
  display: none !important;
}
.emptyState {
  padding: 42px;
  border: 1px dashed #cbd5e1;
  border-radius: 10px;
  background: #fff;
  color: var(--muted);
  text-align: center;
}
.overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(15, 23, 42, .42);
}
.overlay.show {
  display: flex;
}
.modal {
  width: min(760px, 100%);
  max-height: min(800px, 88vh);
  overflow: auto;
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 30px 80px rgba(15, 23, 42, .28);
}
.modalHead {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  padding: 24px 26px 16px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, #e8f3f1, #fff7ed);
}
.modalCategory {
  margin: 0 0 7px;
  color: var(--accentText);
  font-size: 14px;
  font-weight: 800;
}
.modal h2 {
  margin: 0 0 8px;
  font-size: 30px;
  line-height: 1.2;
}
#modalBrief {
  margin: 0;
  color: #3f4c54;
  line-height: 1.65;
}
.close {
  width: 38px;
  padding: 0;
  border-radius: 50%;
  background: #fff;
  font-size: 24px;
}
.modalBody {
  display: grid;
  gap: 16px;
  padding: 22px 26px 26px;
}
.pronunciationBox, .detailBlocks article {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}
.pronunciationBox {
  display: grid;
  gap: 10px;
  padding: 14px 15px;
}
.pronunciationBox div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 10px;
}
.pronunciationBox strong {
  color: var(--muted);
}
.detailBlocks {
  display: grid;
  gap: 12px;
}
.detailBlocks article {
  padding: 14px 15px;
}
.detailBlocks h3 {
  margin: 0 0 8px;
  color: var(--accentText);
  font-size: 15px;
}
.detailBlocks p {
  margin: 0;
  color: #26343c;
  line-height: 1.75;
}
.modalActions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.wordPage {
  max-width: 940px;
}
.wordHero {
  padding: 34px 0 16px;
}
.wordHero h1 {
  font-size: 34px;
}
.wordLayout {
  display: grid;
  gap: 14px;
}
.wordPanel {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(15, 23, 42, .05);
}
.wordPanel h2 {
  margin: 0 0 8px;
  font-size: 18px;
}
.wordPanel p {
  margin: 0;
  line-height: 1.8;
  color: #26343c;
}
.wordNav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.wordNav a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  text-decoration: none;
  background: #fff;
}
@media (max-width: 900px) {
  .searchRow { grid-template-columns: 1fr; }
  .statusRow { display: grid; }
  .termGrid { grid-template-columns: 1fr; }
  .topbar { position: static; }
}
@media (max-width: 560px) {
  .topbarInner {
    padding: 10px 14px 9px;
  }
  main {
    margin-top: 8px;
    padding-left: 14px;
    padding-right: 14px;
  }
  .backLink {
    margin-bottom: 4px;
    font-size: 13px;
  }
  h1, .wordHero h1 {
    font-size: 22px;
  }
  .lead {
    display: none;
  }
  .searchRow {
    grid-template-columns: 1fr 118px;
    gap: 8px;
    margin-top: 8px;
  }
  #search {
    grid-column: 1 / -1;
  }
  input[type="search"], select {
    height: 40px;
  }
  #randomBtn {
    height: 40px;
    padding: 0 10px;
  }
  .modeRow {
    flex-wrap: nowrap;
    gap: 7px;
    margin: 8px -14px 0;
    padding: 0 14px 3px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .modeRow::-webkit-scrollbar {
    display: none;
  }
  .modeRow button {
    flex: 0 0 auto;
    height: 36px;
    padding: 0 11px;
    white-space: nowrap;
  }
  .statusRow {
    margin-top: 5px;
    font-size: 12px;
  }
  .chips {
    display: none;
  }
  .termTop { grid-template-columns: 1fr auto; }
  .termCard {
    gap: 9px;
    padding: 12px;
    border-radius: 9px;
    box-shadow: none;
  }
  .termName {
    font-size: 20px;
  }
  .brief {
    margin-top: 4px;
    line-height: 1.45;
  }
  .cnLine {
    grid-template-columns: 72px 1fr;
  }
  .ipaLine {
    display: none;
  }
  .cardActions {
    gap: 7px;
  }
  .cardActions button, .cardActions a {
    min-height: 34px;
    padding: 0 10px;
  }
  .pronunciationBox div { grid-template-columns: 1fr; }
  .modal { max-height: 92vh; }
  .modalHead, .modalBody { padding-left: 18px; padding-right: 18px; }
}