:root {
  --bg: #f3f6fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --blue: #2563eb;
  --blue-soft: #dbeafe;
  --green: #059669;
  --green-soft: #ecfdf5;
  --red: #dc2626;
  --red-soft: #fef2f2;
  --amber: #b45309;
  --amber-soft: #fffbeb;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

[v-cloak] { display: none; }

button { font: inherit; }

.muted { color: var(--muted); }
.muted-note { color: var(--muted); font-size: 14px; margin-top: 16px; }
.scene-caption { margin: 8px 4px 4px; font-size: 13px; color: var(--muted); line-height: 1.6; }
.scene-caption strong { color: var(--text); }
.icp-line {
  text-align: center;
  padding: 14px 0 26px;
  font-size: 12px;
}
.icp-line a { color: var(--muted); text-decoration: none; }
.icp-line a:hover { color: #2563eb; }
.tts-btn {
  display: inline-block;
  font-size: 12px;
  background: #eef2ff;
  color: #2563eb;
  border: none;
  border-radius: 8px;
  padding: 2px 8px;
  margin-left: 8px;
  vertical-align: baseline;
  cursor: pointer;
}
.tts-btn:active { background: #dbeafe; }
.error { color: var(--red); font-size: 14px; }
.pad { padding: 12px 0; }

/* ---------- buttons ---------- */
.btn {
  border: 0;
  border-radius: 12px;
  background: #eef2f7;
  color: var(--text);
  padding: 11px 16px;
  cursor: pointer;
  transition: transform .08s ease, opacity .15s ease, background .15s ease;
  font-size: 15px;
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--blue); color: #fff; }
.btn.danger { background: var(--red-soft); color: var(--red); }
.btn.small { padding: 8px 12px; font-size: 13px; border-radius: 10px; }
.btn.tiny { padding: 6px 10px; font-size: 12px; border-radius: 9px; background: #f1f5f9; }
.btn.wide { width: 100%; margin-top: 16px; }

/* ---------- login ---------- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border-radius: 20px;
  padding: 30px 24px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, .08);
}
.login-hero {
  width: 96px;
  height: 96px;
  margin-bottom: 14px;
}
.login-hero svg { width: 100%; height: 100%; display: block; }
.login-card h1 { margin: 0 0 4px; font-size: 26px; }
.login-card form { margin-top: 20px; display: flex; flex-direction: column; gap: 14px; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.login-card input {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 16px;
  outline: none;
  background: #fbfdff;
}
.login-card input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-soft); }
.landing-nav-actions { display: flex; gap: 8px; }
.register-cta { margin-top: 14px; }
.register-card-auth { max-width: 430px; }
.auth-note {
  margin: 14px 0 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--amber-soft);
  color: var(--amber);
  font-size: 12px;
  line-height: 1.6;
}
.auth-alt {
  margin: 14px 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
.link-btn {
  border: 0;
  background: transparent;
  color: var(--blue);
  font: inherit;
  font-weight: 650;
  padding: 0;
  cursor: pointer;
}

/* ---------- landing ---------- */
.landing {
  min-height: 100vh;
  background:
    radial-gradient(circle at 82% 8%, #dbeafe 0, rgba(219, 234, 254, 0) 34%),
    radial-gradient(circle at 8% 34%, #ecfdf5 0, rgba(236, 253, 245, 0) 30%),
    var(--bg);
}
.landing-nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.landing-main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 40px;
}
.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
}
.landing-hero {
  display: block;
  max-width: 860px;
  padding: 54px 0 64px;
}
.hero-copy h1 {
  margin: 0;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.12;
  letter-spacing: -.03em;
}
.hero-desc {
  max-width: 560px;
  margin: 22px 0;
  color: #4b5563;
  font-size: 17px;
  line-height: 1.85;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 14px; }
.btn.lg { padding: 14px 22px; font-size: 16px; border-radius: 14px; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; }
.hero-note { margin: 0; color: var(--muted); font-size: 13px; }
.hero-visual { display: flex; justify-content: center; }
.image-card {
  width: 100%;
  max-width: 430px;
  background: #fff;
  border: 1px solid rgba(37, 99, 235, .12);
  border-radius: 24px;
  padding: 14px;
  box-shadow: 0 24px 70px rgba(15, 23, 42, .12);
}
.image-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 2px 4px 10px;
}
.image-word { font-size: 20px; font-weight: 800; }
.image-card img {
  display: block;
  width: 100%;
  height: 540px;
  object-fit: cover;
  object-position: top center;
  border-radius: 16px;
  background: #eef2f7;
}
.image-card-foot {
  padding: 12px 4px 2px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}
.landing-section {
  padding: 54px 0;
  border-top: 1px solid var(--line);
}
.visual-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  align-items: start;
}
.visual-card {
  margin: 0;
  background: #fff;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 10px 34px rgba(15, 23, 42, .07);
}
.visual-card a { display: block; background: #eef2f7; }
.visual-card img { display: block; width: 100%; height: auto; }
.visual-card figcaption {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px 16px;
}
.visual-card strong { font-size: 16px; }
.visual-card span { color: var(--muted); font-size: 13px; line-height: 1.5; }

.landing-section h2 {
  margin: 0 0 22px;
  font-size: clamp(26px, 3vw, 40px);
  letter-spacing: -.02em;
}
.section-lead {
  max-width: 780px;
  margin: -8px 0 24px;
  color: #4b5563;
  font-size: 16px;
  line-height: 1.85;
}
.cefr-levels {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
}
.cefr-level {
  background: #fff;
  border-radius: 14px;
  padding: 16px 10px;
  text-align: center;
  box-shadow: 0 8px 28px rgba(15, 23, 42, .05);
  border-top: 4px solid #cbd5e1;
}
.cefr-level strong { display: block; font-size: 22px; line-height: 1.2; }
.cefr-level span { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; }
.cefr-level.a1 { border-top-color: #86efac; }
.cefr-level.a1 strong { color: #166534; }
.cefr-level.a2 { border-top-color: #5eead4; }
.cefr-level.a2 strong { color: #115e59; }
.cefr-level.b1 { border-top-color: #93c5fd; }
.cefr-level.b1 strong { color: #1e40af; }
.cefr-level.b2 { border-top-color: #a5b4fc; }
.cefr-level.b2 strong { color: #3730a3; }
.cefr-level.c1 { border-top-color: #fdba74; }
.cefr-level.c1 strong { color: #9a3412; }
.cefr-level.c2 { border-top-color: #fca5a5; }
.cefr-level.c2 strong { color: #991b1b; }
.steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.step, .feature {
  background: #fff;
  border-radius: 18px;
  padding: 22px;
  box-shadow: 0 8px 28px rgba(15, 23, 42, .05);
}
.step-shot {
  margin: 16px 0 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: #f8fafc;
}
.step-shot a { display: block; }
.step-shot img {
  display: block;
  width: 100%;
  height: 260px;
  object-fit: cover;
  object-position: top center;
}
.stats-shot img {
  object-fit: contain;
  background: #f8fafc;
}
.step-num { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.step h3, .feature h3 { margin: 10px 0 8px; font-size: 17px; }
.step p, .feature p { margin: 0; color: #4b5563; font-size: 14px; line-height: 1.7; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.register-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 32px;
  margin: 20px 0;
  box-shadow: 0 8px 28px rgba(15, 23, 42, .05);
}
.register-card h2 { margin-bottom: 8px; }
.register-card p { max-width: 640px; margin: 0; line-height: 1.7; }
.wechat-box {
  flex: 0 0 auto;
  min-width: 190px;
  padding: 18px 22px;
  border-radius: 16px;
  background: var(--blue-soft);
  text-align: center;
}
.wechat-box strong { display: block; margin-top: 4px; color: var(--blue); font-size: 20px; }
.landing-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 40px 0 10px;
}
.landing-footer h2 { margin: 0 0 6px; font-size: 26px; }
.landing-footer p { margin: 0; }
.landing-back {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 5;
  border: 0;
  background: rgba(255, 255, 255, .9);
  color: var(--muted);
  border-radius: 10px;
  padding: 9px 13px;
  cursor: pointer;
  box-shadow: 0 3px 14px rgba(15, 23, 42, .06);
}

@media (max-width: 860px) {
  .landing-hero { grid-template-columns: 1fr; gap: 30px; padding: 30px 0 46px; }
  .image-card img { height: 380px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: 1fr; }
  .visual-grid { grid-template-columns: 1fr; }
  .cefr-levels { grid-template-columns: repeat(3, 1fr); }
  .register-card { flex-direction: column; align-items: flex-start; padding: 24px; }
  .wechat-box { width: 100%; }
  .landing-footer { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 560px) {
  .landing-nav { padding: 16px 18px; }
  .landing-main { padding: 0 18px 30px; }
  .steps { grid-template-columns: 1fr; }
  .hero-actions .btn { flex: 1; }
}

/* ---------- shell ---------- */
.app-shell {
  max-width: 820px;
  margin: 0 auto;
  padding-bottom: 84px;
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  background: rgba(243, 246, 251, .9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; font-size: 18px; letter-spacing: .2px; }
.topnav { display: none; gap: 4px; }
.topnav button {
  border: 0; background: transparent; padding: 8px 14px;
  border-radius: 10px; color: var(--muted); cursor: pointer; font-size: 14px;
}
.topnav button.active { background: #fff; color: var(--blue); box-shadow: 0 2px 8px rgba(15,23,42,.06); }

.page { padding: 18px; }

.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 14px;
}
.section-head h2 { margin: 0; font-size: 24px; }

/* ---------- catalog tree ---------- */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}
.crumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 2px; }
.crumb {
  border: 0;
  background: transparent;
  color: var(--blue);
  padding: 4px 3px;
  font-size: 14px;
  cursor: pointer;
}
.crumb.current { color: var(--muted); cursor: default; }
.crumb-sep { color: #cbd5e1; font-size: 13px; }
.deck-list { display: flex; flex-direction: column; gap: 10px; }
.deck-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  text-align: left;
  border: 0;
  background: var(--card);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 3px 14px rgba(15, 23, 42, .04);
  cursor: pointer;
}
.deck-name { font-size: 17px; font-weight: 650; }
.deck-arrow { color: #94a3b8; font-size: 24px; line-height: 1; }

/* ---------- catalog ---------- */
.segmented {
  display: flex;
  background: #e8edf5;
  border-radius: 12px;
  padding: 4px;
  gap: 4px;
}
.segmented button {
  flex: 1;
  border: 0;
  background: transparent;
  padding: 9px 10px;
  border-radius: 9px;
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
}
.segmented button.active {
  background: #fff;
  color: var(--text);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(15,23,42,.07);
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.chips button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
}
.chips button.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 12px 0;
}
.toolbar-actions { display: flex; gap: 8px; }
.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 18px 0 8px;
}

.card-list { display: flex; flex-direction: column; gap: 10px; }
.catalog-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card);
  border-radius: 14px;
  padding: 12px 14px;
  box-shadow: 0 3px 14px rgba(15,23,42,.04);
}
.catalog-item.done { opacity: .62; }
.check-wrap { display: flex; align-items: center; }
.check-wrap input { width: 18px; height: 18px; accent-color: var(--blue); }
.catalog-main { flex: 1; min-width: 0; }
.row1 { display: block; }
.word { font-weight: 650; font-size: 17px; overflow-wrap: anywhere; }
.row-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 3px;
  font-size: 12px;
  line-height: 1.5;
}
.row2 {
  margin-top: 3px;
  font-size: 13px;
  line-height: 1.5;
  color: #4b5563;
  white-space: normal;
  overflow-wrap: anywhere;
}
.row3 { margin-top: 3px; font-size: 12px; color: #9ca3af; }

.tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  background: #eef2f7;
  color: #475569;
}
.lv-A1 { background: #dcfce7; color: #166534; }
.lv-A2 { background: #ccfbf1; color: #115e59; }
.lv-B1 { background: #dbeafe; color: #1e40af; }
.lv-B2 { background: #e0e7ff; color: #3730a3; }
.lv-C1 { background: #ffedd5; color: #9a3412; }
.lv-C2 { background: #fee2e2; color: #991b1b; }

.badge {
  font-size: 12px;
  color: var(--green);
  background: var(--green-soft);
  padding: 5px 9px;
  border-radius: 999px;
  white-space: nowrap;
}
.empty { text-align: center; padding: 28px 10px; }

/* ---------- search ---------- */
.search-form {
  display: flex;
  gap: 10px;
  margin-bottom: 8px;
}
.search-form input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 16px;
  background: #fff;
  outline: none;
}
.search-form input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}
.search-help { font-size: 13px; margin: 0 0 10px; }
.catalog-search-form { margin-bottom: 16px; }
.search-result { margin-top: 14px; }
.image-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 16px 0;
}
.word-image {
  margin: 0;
  background: var(--card);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 3px 14px rgba(15, 23, 42, .05);
}
.word-image a { display: block; }
.word-image img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: fill;
  background: #fff;
}
.word-image figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  font-size: 14px;
  color: #4b5563;
  overflow-wrap: anywhere;
}
.word-image figcaption a { color: var(--blue); white-space: nowrap; }

/* ---------- image viewer ---------- */
body.no-scroll { overflow: hidden; }
.image-viewer-overlay {
  position: fixed;
  inset: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  background: rgba(15, 23, 42, .88);
}
.image-viewer {
  width: 100%;
  max-width: 1100px;
  height: 96vh;
  display: flex;
  flex-direction: column;
  background: #0f172a;
  border-radius: 12px;
  overflow: hidden;
}
.viewer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  background: #111827;
  color: #e5e7eb;
}
.viewer-title { font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.viewer-actions { display: flex; align-items: center; gap: 6px; flex: 0 0 auto; }
.viewer-actions .btn.tiny { background: #1f2937; color: #e5e7eb; text-decoration: none; }
.viewer-scroll {
  flex: 1;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  background: #fff;
}
.viewer-scroll img {
  display: block;
  height: auto;
  max-width: none;
}
.search-list { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
.search-item {
  background: var(--card);
  border-radius: 14px;
  padding: 13px 14px;
  box-shadow: 0 3px 14px rgba(15, 23, 42, .04);
}
.search-empty { padding: 40px 12px; }

/* ---------- study ---------- */
.study-wrap { display: flex; flex-direction: column; gap: 8px; }
.study-card {
  position: relative;
  background: var(--card);
  border-radius: 18px;
  padding: 20px;
  box-shadow: 0 8px 30px rgba(15,23,42,.06);
}
.card-menu { position: absolute; top: 12px; right: 12px; z-index: 5; }
.study-counts {
  display: flex;
  justify-content: center;
  gap: 14px;
  padding: 2px 12px;
  color: #64748b;
  font-size: 12px;
  white-space: nowrap;
}
.icon-btn {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid #e5e7eb;
  background: var(--card);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}
.card-menu-pop {
  position: absolute;
  right: 0;
  top: 36px;
  min-width: 110px;
  display: flex;
  flex-direction: column;
  padding: 6px;
  background: var(--card);
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(15,23,42,.16);
}
.card-menu-pop button {
  border: 0;
  background: none;
  text-align: left;
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.card-menu-pop button:hover { background: #f1f5f9; }
.study-meta { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.card-image {
  display: block;
  max-width: 100%;
  max-height: 510px;
  margin: 0 auto 14px;
  border-radius: 12px;
  object-fit: contain;
}
.answer-head {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin: 6px 0 10px;
  font-size: 13px;
}
.answer-head .muted { margin-right: 4px; }

.answer-fields {
  display: grid;
  gap: 5px;
  margin: 6px 0 12px;
  font-size: 13px;
}
.answer-field { display: flex; gap: 8px; }
.answer-field .muted { flex: 0 0 76px; }
.answer-field b { font-weight: 700; color: var(--text); }

.preview-image {
  width: 100%;
  max-width: 440px;
  display: block;
  margin: 0 auto 12px;
  border-radius: 12px;
}

.autoread-options {
  margin: -4px 0 12px 0;
  padding: 10px 14px;
  border-radius: 12px;
  background: #f8fafc;
  display: grid;
  gap: 8px;
}
.listen-sleep {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  margin-bottom: 10px;
  border-radius: 12px;
  background: #f8fafc;
  font-size: 13px;
}
.listen-sleep-title { font-weight: 600; }
.listen-sleep-input { width: 72px; }
.interval-sub { font-size: 14px; font-weight: 700; margin: 8px 0 4px; }
.number-input:disabled,
.number-input.coeff { color: #94a3b8; background: #eef2f5; width: 64px; text-align: center; }

.autoread-option {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  cursor: pointer;
}
.autoread-option input { width: 16px; height: 16px; }

/* ---------- study management ---------- */
.manage-section { margin: 18px 0 22px; }
.manage-entry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin-top: 10px;
}
.manage-entry {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 16px;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  background: var(--card);
  cursor: pointer;
  text-align: left;
}
.manage-entry-title { font-weight: 600; }
.manage-entry-num { font-size: 24px; font-weight: 700; }
.study-manage-modal {
  max-width: 760px;
  max-height: 86vh;
  display: flex;
  flex-direction: column;
}
.study-manage-modal .manage-list {
  overflow: auto;
  flex: 1;
  padding-right: 2px;
}
.manage-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.manage-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 10px 0;
  font-size: 13px;
}
.check { display: flex; align-items: center; gap: 6px; }
.manage-list { display: flex; flex-direction: column; gap: 8px; }
.manage-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(15,23,42,.04);
}
.manage-main { flex: 1; min-width: 0; }
.manage-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.manage-pager {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}
.hint {
  margin: 16px 0 12px;
  padding: 10px 12px;
  background: #f8fafc;
  border-left: 4px solid #93c5fd;
  border-radius: 8px;
  color: #4b5563;
  font-size: 15px;
  line-height: 1.6;
}
.target-zh {
  color: var(--blue);
  font-weight: 700;
  background: var(--blue-soft);
  padding: 0 3px;
  border-radius: 4px;
}
.sentence {
  margin: 14px 0;
  font-size: 22px;
  line-height: 1.6;
  font-weight: 650;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.audio-row { display: flex; gap: 8px; margin: 10px 0; }
.answer { margin-top: 6px; }
.divider { height: 1px; background: var(--line); margin: 18px 0; }
.full-sentence {
  font-size: 20px;
  line-height: 1.6;
  font-weight: 600;
  white-space: pre-wrap;
}
.sentence-zh {
  color: #374151;
  font-size: 15px;
  line-height: 1.75;
  white-space: pre-wrap;
}
.detail {
  margin-top: 14px;
  background: #f8fafc;
  border-radius: 12px;
  padding: 12px 14px;
}
.detail-collapsed { cursor: pointer; }
.detail-collapsed .detail-label { color: #6b7280; font-weight: 400; }
.detail-label { font-weight: 700; margin-bottom: 6px; font-size: 14px; }
.detail p { margin: 0; line-height: 1.75; color: #374151; white-space: pre-wrap; }

.listen-card .listen-sentence { margin-top: 16px; }
.listen-note { font-size: 12px; margin: 14px 0 0; }

.rating-note { font-size: 13px; margin: 8px 0 0; }
.review-result {
  margin: 14px 0 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--green-soft);
  color: #166534;
  font-size: 14px;
}
.rating-row { display: flex; gap: 10px; margin-top: 18px; }
.btn.rating {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 12px 6px;
  font-weight: 650;
}
.btn.rating small { font-weight: 400; font-size: 11px; opacity: .8; }
.btn.again { background: var(--red-soft); color: var(--red); }
.btn.hard { background: var(--amber-soft); color: var(--amber); }
.btn.good { background: var(--green-soft); color: var(--green); }

.done-card {
  text-align: center;
  background: var(--card);
  border-radius: 18px;
  padding: 34px 20px;
  box-shadow: 0 8px 30px rgba(15,23,42,.06);
}
.done-icon {
  width: 54px; height: 54px; margin: 0 auto 12px;
  border-radius: 50%;
  background: var(--green-soft);
  color: var(--green);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 800;
}
.done-card h3 { margin: 0 0 6px; }

/* ---------- profile ---------- */
.stats-section { margin-bottom: 18px; }
.stats-section h3 { margin: 0 0 8px; font-size: 16px; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.stats-grid.three { grid-template-columns: repeat(3, 1fr); }
.stats-grid.two { grid-template-columns: repeat(2, 1fr); }
.stat {
  background: var(--card);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 3px 14px rgba(15,23,42,.04);
}
.stat .num { font-size: 28px; font-weight: 750; color: var(--blue); }
.stat .label { color: var(--muted); font-size: 13px; margin-top: 2px; }
.pie-wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  background: var(--card);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 3px 14px rgba(15,23,42,.04);
}
.pie {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.pie-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
  min-width: 190px;
  font-size: 13px;
}
.pie-legend li { display: flex; align-items: center; gap: 8px; }
.pie-dot { width: 10px; height: 10px; border-radius: 2px; flex: 0 0 auto; }
.pie-count {
  margin-left: auto;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.mycards-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
}
.mycards-head h3 { margin: 0; font-size: 18px; }
.mycards-list { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.mycards-item {
  background: var(--card);
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 3px 14px rgba(15, 23, 42, .04);
}
.mycards-main .word { margin-right: 6px; }
.mycards-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}
.danger-text { color: var(--red); background: var(--red-soft); }

.settings-card {
  background: var(--card);
  border-radius: 14px;
  padding: 16px;
  margin-top: 18px;
  box-shadow: 0 3px 14px rgba(15, 23, 42, .04);
}
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.setting-title { font-weight: 650; }
.setting-desc { font-size: 13px; line-height: 1.5; margin-top: 2px; }
.setting-gap {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.mode-tabs { flex: 0 0 auto; min-width: 210px; }
.number-wrap { display: flex; align-items: center; gap: 6px; flex: 0 0 auto; }
.number-input {
  width: 74px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
  background: #fbfdff;
  color: var(--text);
}
.switch {
  position: relative;
  width: 48px;
  height: 28px;
  flex: 0 0 auto;
  cursor: pointer;
}
.switch input { opacity: 0; width: 0; height: 0; }
.switch .slider {
  position: absolute;
  inset: 0;
  background: #cbd5e1;
  border-radius: 999px;
  transition: .2s;
}
.switch .slider:before {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: .2s;
  box-shadow: 0 1px 3px rgba(15, 23, 42, .2);
}
.switch input:checked + .slider { background: var(--blue); }
.switch input:checked + .slider:before { transform: translateX(20px); }

.profile-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.notice {
  color: #166534;
  background: var(--green-soft);
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 14px;
}

/* ---------- modal ---------- */
.modal-overlay.preview-overlay { z-index: 60; }

.card-preview-modal {
  max-height: 86vh;
  overflow-y: auto;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(15, 23, 42, .45);
}
.modal {
  width: 100%;
  max-width: 360px;
  background: var(--card);
  border-radius: 16px;
  padding: 22px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, .18);
}
.modal h3 { margin: 0 0 8px; }
.modal p { margin: 0 0 18px; line-height: 1.6; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }

.card-form-modal {
  max-width: 560px;
  max-height: 86vh;
  overflow-y: auto;
}
.card-form-modal label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--muted);
}
.card-form-modal input,
.card-form-modal textarea,
.card-form-modal select {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 10px;
  font: inherit;
  color: var(--text);
  background: #fbfdff;
}
.card-form-modal textarea { min-height: 64px; resize: vertical; }
.form-row { display: flex; gap: 10px; }
.form-row label { flex: 1; }

/* ---------- tabbar ---------- */
.tabbar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  background: rgba(255,255,255,.96);
  border-top: 1px solid var(--line);
  padding: 8px 8px calc(8px + env(safe-area-inset-bottom));
  z-index: 20;
}
.tabbar button {
  flex: 1;
  border: 0;
  background: transparent;
  padding: 8px 0;
  color: var(--muted);
  font-size: 13px;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
}
.tabbar button.active { color: var(--blue); font-weight: 700; }

@media (max-width: 600px) {
  .setting-row { flex-wrap: wrap; }
  .mode-tabs { width: 100%; min-width: 0; }
}

/* ---------- desktop ---------- */
@media (min-width: 760px) {
  .topnav { display: flex; }
  .tabbar { display: none; }
  .app-shell { max-width: 1080px; padding-bottom: 30px; }
  .page { padding: 24px; }
}

/* ---------- catalog preview ---------- */
.catalog-main.clickable { cursor: pointer; }
.catalog-main.clickable:hover .word { color: var(--blue); }
.row2 { min-height: 20px; }
.row3 { min-height: 18px; }

.card-preview-modal {
  max-width: 660px;
  max-height: 86vh;
  overflow-y: auto;
}
.preview-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}
.preview-head h3 {
  margin: 0 0 6px;
  font-size: 22px;
  overflow-wrap: anywhere;
}
.preview-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}
.preview-fields {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 10px 14px;
  margin: 18px 0;
  padding: 16px;
  border-radius: 12px;
  background: #f8fafc;
}
.preview-fields dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}
.preview-fields dd {
  margin: 0;
  color: #374151;
  font-size: 14px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
.preview-fields .pre-wrap { white-space: pre-wrap; }