:root {
  --ink: #112b2a;
  --paper: #f5f0e3;
  --card: #fffdf7;
  --lime: #b8df45;
  --green: #1f6b54;
  --coral: #ef765c;
  --yellow: #f7c84b;
  --muted: #6e776f;
  --line: rgba(17, 43, 42, 0.16);
  --reading-label-size: .8125rem;
  --reading-title-size: 1rem;
  --reading-text-size: 1.125rem;
  --reading-line-height: 1.6;
  --reading-item-gap: .5rem;
  --reading-voice-size: .875rem;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { max-width: 100%; overflow-x: clip; scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
  max-width: 100%;
  overflow-x: clip;
}
body.dialog-open { overflow: hidden; }

button, input, select { font: inherit; }
button { color: inherit; }

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .15;
  z-index: 20;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
}

.topbar {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  color: var(--ink);
  text-decoration: none;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.5px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 35px;
  height: 35px;
  display: grid;
  place-items: center;
  color: white;
  background: var(--ink);
  border-radius: 10px 10px 10px 3px;
  font-family: Georgia, serif;
  font-style: italic;
}

.topbar-note {
  color: var(--muted);
  font: 700 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}

.topbar-note span {
  width: 7px;
  height: 7px;
  display: inline-block;
  background: var(--lime);
  border-radius: 50%;
  margin-right: 7px;
  box-shadow: 0 0 0 5px rgba(184, 223, 69, .17);
}

.topbar-actions { display: flex; align-items: center; gap: 15px; }
.lan-access-button {
  min-height: 38px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: rgba(255, 253, 247, .78);
  color: var(--green);
  cursor: pointer;
  font-size: 11px;
  font-weight: 900;
}
.lan-access-button:hover, .lan-access-button:focus-visible { border-color: var(--green); background: var(--card); }
.account-area { position: relative; z-index: 25; }
.account-button {
  min-height: 38px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: var(--card);
  cursor: pointer;
  font-size: 11px;
  font-weight: 800;
}
.account-button.logged-in { color: white; border-color: var(--green); background: var(--green); }
.account-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 210px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  box-shadow: 0 16px 45px rgba(22, 51, 40, .16);
}
.account-menu strong, .account-menu small { display: block; }
.account-menu small { margin-top: 5px; color: var(--muted); font-size: 10px; }
.account-menu button { width: 100%; min-height: 44px; margin-top: 12px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: white; cursor: pointer; font-size: 14px; font-weight: 800; }
#delete-account-button { color: #9f321f; border-color: rgba(159, 50, 31, .35); }

.auth-dialog { position: fixed; z-index: 50; inset: 0; display: grid; place-items: center; padding: 18px; }
.auth-backdrop { position: absolute; inset: 0; background: rgba(17, 43, 42, .56); backdrop-filter: blur(5px); }
.auth-card {
  position: relative;
  width: min(430px, 100%);
  padding: 28px;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 16px;
  background: var(--card);
  box-shadow: 0 30px 90px rgba(17,43,42,.28);
}
.auth-card h2 { margin: 10px 0 7px; font: 500 30px/1.15 Georgia, serif; }
.auth-copy { margin: 0 0 18px; color: var(--muted); font-size: 12px; line-height: 1.55; }
.auth-close { position: absolute; top: 12px; right: 12px; width: 32px; height: 32px; border: 0; border-radius: 50%; background: #efede5; cursor: pointer; font-size: 20px; }
.auth-tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; padding: 4px; margin-bottom: 16px; border-radius: 10px; background: #efede5; }
.auth-tab { padding: 9px; border: 0; border-radius: 7px; background: transparent; cursor: pointer; font-size: 11px; font-weight: 800; }
.auth-tab.active { color: white; background: var(--ink); }
.auth-field { display: grid; gap: 6px; margin-top: 11px; color: var(--muted); font-size: 10px; font-weight: 800; }
.auth-field input { width: 100%; height: 44px; padding: 0 12px; border: 1px solid var(--line); border-radius: 9px; outline: none; background: white; color: var(--ink); font-size: 13px; }
.auth-field input:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(31,107,84,.1); }
.auth-error { margin: 11px 0 0; color: #a43b29; font-size: 11px; }
.auth-submit { width: 100%; min-height: 46px; margin-top: 16px; border: 0; border-radius: 10px; background: var(--green); color: white; cursor: pointer; font-weight: 900; }
.auth-submit:disabled { cursor: wait; opacity: .55; }
.recovery-code-card { width: min(520px, 100%); }
.recovery-code-value {
  min-height: 66px;
  display: grid;
  place-items: center;
  padding: 14px;
  border: 2px dashed var(--green);
  border-radius: 12px;
  background: #eff7e2;
  color: var(--ink);
  font: 800 clamp(19px, 4vw, 28px)/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 2px;
  overflow-wrap: anywhere;
}
.recovery-copy-button { width: 100%; min-height: 42px; margin-top: 9px; border: 1px solid var(--green); border-radius: 9px; background: white; color: var(--green); cursor: pointer; font-weight: 900; }
.recovery-safety-list { margin: 15px 0; padding-left: 21px; color: var(--muted); font-size: 12px; line-height: 1.65; }
.recovery-confirm { display: flex; align-items: flex-start; gap: 9px; color: var(--ink); font-size: 12px; font-weight: 800; line-height: 1.45; }
.recovery-confirm input { width: 18px; height: 18px; flex: 0 0 auto; accent-color: var(--green); }
.lan-access-card { width: min(540px, 100%); }
.lan-service-status {
  margin: 0 0 14px;
  padding: 11px 13px;
  border-radius: 10px;
  background: #eff7e2;
  color: #174838;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.5;
}
.lan-address-picker { display: grid; gap: 6px; margin-bottom: 10px; color: var(--muted); font-size: 11px; font-weight: 800; }
.lan-address-picker select { width: 100%; min-height: 44px; padding: 0 12px; border: 1px solid var(--line); border-radius: 9px; background: white; color: var(--ink); }
.lan-address-box { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: stretch; }
.lan-address-box code { min-width: 0; padding: 12px; border: 1px solid var(--line); border-radius: 9px; background: #f7f3e9; color: var(--ink); font: 700 13px/1.5 ui-monospace, SFMono-Regular, Consolas, monospace; overflow-wrap: anywhere; }
.lan-address-box button { min-height: 44px; padding: 0 14px; border: 1px solid var(--green); border-radius: 9px; background: white; color: var(--green); cursor: pointer; font-weight: 900; }
.lan-qr-panel { min-height: 230px; margin-top: 13px; padding: 14px; display: grid; place-items: center; border: 1px dashed rgba(31, 107, 84, .38); border-radius: 13px; background: white; }
.lan-qr-panel img { display: block; width: min(296px, 100%); height: auto; aspect-ratio: 1; object-fit: contain; image-rendering: pixelated; }
.lan-qr-panel p { margin: 0; max-width: 340px; color: var(--muted); font-size: 13px; line-height: 1.6; text-align: center; }
.lan-dialog-actions { margin-top: 12px; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.lan-dialog-actions .auth-submit { margin-top: 0; }
.lan-dialog-actions .secondary-action { min-height: 46px; }
.clipboard-helper { position: fixed; left: -9999px; top: 0; opacity: 0; }

.hero {
  max-width: 1040px;
  margin: 80px auto 70px;
  padding: 0 32px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 21px;
  font: 800 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--green);
  letter-spacing: 3px;
}

.hero h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(45px, 6vw, 74px);
  line-height: 1.04;
  letter-spacing: -3px;
  font-weight: 500;
}

.hero h1 em { color: var(--green); font-weight: 500; }

.hero-copy {
  width: min(620px, 100%);
  margin: 25px auto 33px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 16px;
}

.search-panel {
  width: min(880px, 100%);
  margin: auto;
  padding: 8px;
  display: grid;
  grid-template-columns: 1fr 190px 190px;
  align-items: stretch;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 18px;
  box-shadow: 0 18px 50px rgba(30, 50, 36, .09);
}

.search-field {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 17px;
}

.search-field svg {
  width: 22px;
  fill: none;
  stroke: var(--green);
  stroke-width: 2;
  stroke-linecap: round;
}

.search-field input {
  border: 0;
  outline: 0;
  background: transparent;
  width: 100%;
  min-width: 0;
  font: 600 20px/1 Georgia, serif;
  color: var(--ink);
}

.grade-field {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: left;
  border-left: 1px solid var(--line);
  padding: 0 19px;
}

.grade-field span {
  color: var(--muted);
  font: 700 9px/1.2 ui-monospace, monospace;
  letter-spacing: 1px;
  margin-bottom: 5px;
}

.grade-field select {
  appearance: none;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.explore-button {
  border: 0;
  border-radius: 12px;
  background: var(--ink);
  color: white;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform .2s ease, background .2s ease;
}

.explore-button:hover { background: var(--green); transform: translateY(-1px); }
.explore-button svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 2; }

.quick-words {
  margin-top: 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}

.quick-words button {
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: transparent;
  cursor: pointer;
  font: 600 12px/1 Georgia, serif;
}

.quick-words button:hover { background: white; border-color: var(--green); }

.learning-mode-tabs {
  width: fit-content;
  margin: 0 auto 18px;
  padding: 5px;
  display: flex;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: rgba(255, 253, 247, .72);
}

.learning-mode-tab {
  min-width: 112px;
  padding: 10px 18px;
  border: 0;
  border-radius: 99px;
  background: transparent;
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
}

.learning-mode-tab.active { color: white; background: var(--ink); }

.my-words-library {
  max-width: 1380px;
  margin: 0 auto 90px;
  padding: 0 30px;
}
.my-words-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 18px 0 12px;
  color: var(--muted);
  font-size: 12px;
}
.my-words-summary strong { color: var(--ink); font-size: 20px; }
.my-words-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 14px; }
.my-words-toolbar p { margin: 0; color: var(--muted); font-size: 12px; }
.secondary-action {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  font-size: 11px;
  font-weight: 800;
}
.secondary-action:hover { border-color: var(--green); color: var(--green); }
.my-word-card .textbook-card-actions button:last-child { border-color: var(--line); color: var(--ink); background: white; }
.tutor-header-actions { display: flex; align-items: center; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.unit-learning-actions #my-word-button { border-color: var(--yellow); }
.unit-learning-actions #my-word-button.selected,
#unit-add-my-word.selected { color: white; border-color: var(--green); background: var(--green); }

.textbook-library,
.unit-practice-library,
.review-records-library {
  max-width: 1380px;
  margin: 0 auto 90px;
  padding: 0 30px;
}

.practice-research-card {
  margin-top: 16px;
  padding: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--ink);
  color: white;
}
.practice-research-copy h3 { margin: 7px 0 6px; font: 500 28px/1.1 Georgia, serif; }
.practice-research-copy p { max-width: 660px; margin: 0; color: rgba(255,255,255,.7); font-size: 12px; line-height: 1.65; }
.practice-research-stats { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 20px; }
.practice-research-stats span { color: rgba(255,255,255,.68); font-size: 11px; white-space: nowrap; }
.practice-research-stats strong { color: white; font-size: 18px; }
.practice-source-panel {
  margin-top: 14px;
  padding: 19px 22px;
  display: grid;
  grid-template-columns: minmax(220px, .7fr) minmax(0, 1.3fr);
  gap: 24px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--card);
}
.practice-source-panel h3 { margin: 0 0 6px; font: 600 20px/1.2 Georgia, serif; }
.practice-source-panel p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.55; }
.practice-source-panel ul { margin: 0; padding: 0; display: grid; gap: 8px; list-style: none; }
.practice-source-panel li { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.practice-source-panel a { color: var(--green); font-size: 12px; font-weight: 800; text-decoration-thickness: 1px; }
.practice-source-panel span { flex: 0 0 auto; color: var(--muted); font-size: 9px; }

.practice-paper { margin-top: 26px; padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--card); box-shadow: 0 20px 55px rgba(22,51,40,.08); }
.practice-paper-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.practice-paper-head h2 { margin: 0; font: 500 36px/1.1 Georgia, serif; }
.practice-paper-head p:not(.eyebrow) { margin: 8px 0 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.practice-ai-badge { flex: 0 0 auto; padding: 8px 11px; border-radius: 99px; color: #164d3e; background: rgba(184,223,69,.4); font-size: 10px; font-weight: 900; }
.practice-knowledge { padding: 24px 0; border-bottom: 1px solid var(--line); }
.practice-knowledge > h3 { margin: 0 0 14px; font-size: 17px; }
.practice-knowledge-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; }
.practice-knowledge-grid > section,
.practice-writing-feedback > section { padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: #f8f5ec; }
.practice-knowledge h4,
.practice-writing-feedback h4 { margin: 0 0 8px; font-size: 12px; }
.practice-knowledge ul,
.practice-writing-feedback ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 11px; line-height: 1.7; }
.practice-section { padding: 28px 0; border-bottom: 1px solid var(--line); }
.practice-question { margin-top: 14px; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: white; }
.practice-question-prompt { margin: 0 0 13px; font-size: 15px; line-height: 1.55; font-weight: 700; }
.practice-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.practice-options label { min-width: 0; padding: 11px 12px; display: flex; align-items: center; gap: 9px; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; font-size: 13px; }
.practice-options label:has(input:checked) { border-color: var(--green); background: rgba(184,223,69,.18); }
.practice-options input { accent-color: var(--green); }
.practice-options span { width: 23px; height: 23px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 50%; background: #efede5; font-size: 10px; font-weight: 900; }
.practice-options strong { min-width: 0; overflow-wrap: anywhere; font-weight: 700; }
.practice-fill-question { display: grid; grid-template-columns: minmax(0, 1fr) minmax(180px, .45fr); align-items: center; gap: 18px; }
.practice-fill-question label { font-size: 14px; line-height: 1.55; font-weight: 700; }
.practice-fill-question input,
.practice-writing-section textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; outline: none; background: #fffdf7; color: var(--ink); }
.practice-fill-question input:focus,
.practice-writing-section textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(31,107,84,.1); }
.practice-passage { padding: 18px; border-left: 4px solid var(--green); border-radius: 0 12px 12px 0; background: #f4f0e6; font: 500 15px/1.8 Georgia, serif; white-space: pre-wrap; }
.practice-writing-section h4 { margin: 16px 0 10px; font-size: 16px; line-height: 1.5; }
.practice-writing-section ul { color: var(--muted); font-size: 12px; line-height: 1.7; }
.practice-writing-section textarea { min-height: 210px; resize: vertical; font: 500 15px/1.7 Georgia, serif; }
.practice-submit-bar { padding-top: 22px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.practice-submit-bar p { margin: 0; color: var(--muted); font-size: 11px; }
.practice-evaluation { margin-top: 24px; padding: 24px; display: grid; grid-template-columns: 180px minmax(0,1fr); gap: 26px; border-radius: 18px; background: var(--ink); color: white; }
.practice-score-card { min-height: 160px; align-self: start; position: sticky; top: 20px; display: grid; place-content: center; text-align: center; border: 1px solid rgba(255,255,255,.2); border-radius: 15px; background: rgba(255,255,255,.06); }
.practice-score-card strong { color: var(--lime); font: 500 64px/1 Georgia, serif; }
.practice-score-card span { color: rgba(255,255,255,.65); }
.practice-score-card p { margin: 9px 0 0; font-weight: 900; }
.practice-evaluation-copy h3 { margin: 0; font: 500 28px/1.2 Georgia, serif; }
.practice-evaluation-copy > p { color: rgba(255,255,255,.72); }
#practice-result-list { display: grid; gap: 8px; }
.practice-result { padding: 13px; border-radius: 10px; background: rgba(255,255,255,.08); }
.practice-result.correct { border-left: 4px solid var(--lime); }
.practice-result.wrong { border-left: 4px solid var(--coral); }
.practice-result p { margin: 5px 0; font-size: 14px; line-height: 1.55; }
.practice-result small { color: rgba(255,255,255,.72); font-size: 13px; line-height: 1.5; }
.practice-writing-feedback { margin-top: 16px; display: grid; gap: 10px; }
.practice-writing-feedback > section { color: var(--ink); }
.practice-corrected-sample { padding: 14px; border-radius: 10px; background: rgba(255,255,255,.08); white-space: pre-wrap; line-height: 1.7; }
.practice-review-entry {
  margin-top: 24px;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border: 1px solid rgba(31,107,84,.24);
  border-radius: 15px;
  background: rgba(184,223,69,.14);
}
.practice-review-entry strong { display: block; margin-top: 4px; font-size: 15px; }
.practice-review-entry .secondary-action { min-height: 44px; }

.review-heading .secondary-action { min-height: 44px; }
.review-login-notice {
  min-height: 150px;
  padding: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
}
.review-login-notice strong { font: 600 24px/1.2 Georgia, serif; }
.review-login-notice p { margin: 8px 0 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.review-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.review-stats article {
  min-width: 0;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--card);
}
.review-stats span { display: block; color: var(--muted); font-size: 13px; font-weight: 700; }
.review-stats strong { display: block; margin-top: 8px; color: var(--green); font: 600 30px/1 Georgia, serif; }
.review-stats strong b { font: inherit; }
.review-filters {
  margin: 16px 0 18px;
  display: grid;
  grid-template-columns: repeat(6, minmax(120px, 1fr));
  gap: 8px;
}
.review-filters label {
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--card);
}
.review-filters label > span { display: block; margin-bottom: 5px; color: var(--muted); font-size: 11px; font-weight: 800; }
.review-filters select { width: 100%; min-width: 0; border: 0; outline: 0; color: var(--ink); background: transparent; font-size: 14px; font-weight: 700; }
.review-list-toolbar { margin-bottom: 10px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.review-list-toolbar p { margin: 0; color: var(--muted); font-size: 13px; font-weight: 700; }
.review-list-tools { display: flex; flex-wrap: wrap; gap: 7px; }
.review-list-tools button { min-height: 44px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--green); cursor: pointer; font-size: 12px; font-weight: 800; }
.review-record-list { display: grid; gap: 12px; }
.review-grade-group { min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 17px; background: var(--card); box-shadow: 0 13px 34px rgba(22,51,40,.06); }
.review-grade-group > summary,
.review-type-group > summary,
.review-record-summary { list-style: none; cursor: pointer; }
.review-grade-group > summary::-webkit-details-marker,
.review-type-group > summary::-webkit-details-marker,
.review-record-summary::-webkit-details-marker { display: none; }
.review-grade-group > summary { min-height: 64px; padding: 14px 18px; display: flex; align-items: center; justify-content: space-between; gap: 14px; background: linear-gradient(100deg, rgba(184,223,69,.14), rgba(255,255,255,.28)); }
.review-grade-group > summary::before,
.review-type-group > summary::before,
.review-record-summary::before { content: '›'; flex: 0 0 auto; color: var(--green); font-size: 20px; font-weight: 900; transition: transform .16s ease; }
.review-grade-group[open] > summary::before,
.review-type-group[open] > summary::before,
.review-record-card[open] > .review-record-summary::before { transform: rotate(90deg); }
.review-grade-group > summary > span { min-width: 0; display: grid; gap: 3px; margin-right: auto; }
.review-grade-group > summary strong { color: var(--ink); font-size: 17px; }
.review-grade-group > summary span span { color: var(--muted); font-size: 12px; }
.review-grade-group > summary b { flex: 0 0 auto; padding: 6px 9px; border-radius: 99px; background: #eef2e6; color: var(--green); font-size: 11px; }
.review-grade-types { padding: 10px; display: grid; gap: 9px; border-top: 1px solid var(--line); }
.review-type-group { min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.5); }
.review-type-group > summary { min-height: 48px; padding: 8px 13px; display: flex; align-items: center; gap: 10px; }
.review-type-group > summary strong { margin-right: auto; font-size: 14px; }
.review-type-group > summary span { padding: 4px 8px; border-radius: 99px; background: #f4f0e6; color: var(--muted); font-size: 11px; font-weight: 800; }
.review-type-records { border-top: 1px solid var(--line); }
.review-record-card {
  min-width: 0;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.review-record-card:last-child { border-bottom: 0; }
.review-record-card.status-pending { border-left: 4px solid var(--coral); }
.review-record-card.status-unfamiliar { border-left: 4px solid var(--yellow); }
.review-record-card.status-mastered { border-left: 4px solid var(--green); }
.review-record-summary { min-height: 70px; padding: 11px 13px; display: flex; align-items: center; gap: 11px; }
.review-record-summary-copy { min-width: 0; display: grid; gap: 4px; margin-right: auto; }
.review-context { min-width: 0; color: var(--green); font-size: 12px; line-height: 1.45; font-weight: 800; overflow-wrap: anywhere; }
.review-status { flex: 0 0 auto; padding: 6px 9px; border-radius: 99px; background: #eef2e6; font-size: 11px; }
.review-question { color: var(--ink); font-size: 16px; line-height: 1.45; overflow-wrap: anywhere; }
.review-row-meta { color: var(--muted); font-size: 11px; line-height: 1.45; }
.review-record-detail { padding: 4px 16px 16px 40px; display: grid; gap: 13px; }
.review-type { margin: 0; color: var(--muted); font-size: 12px; font-weight: 800; }
.review-answer-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.review-answer-grid p { min-width: 0; margin: 0; padding: 11px; border-radius: 10px; background: #f4f0e6; }
.review-answer-grid span { display: block; color: var(--muted); font-size: 11px; }
.review-answer-grid strong { display: block; margin-top: 5px; font-size: 15px; line-height: 1.45; overflow-wrap: anywhere; }
.review-explanation { margin: 0; padding: 13px; border-left: 4px solid var(--lime); border-radius: 0 10px 10px 0; background: rgba(184,223,69,.1); font-size: 14px; line-height: 1.65; }
.review-dates { margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 7px; }
.review-dates div { min-width: 0; }
.review-dates dt { color: var(--muted); font-size: 10px; font-weight: 800; }
.review-dates dd { margin: 4px 0 0; font-size: 12px; line-height: 1.4; overflow-wrap: anywhere; }
.review-actions { margin-top: auto; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 7px; }
.review-actions button {
  min-width: 0;
  min-height: 44px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: white;
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
}
.review-actions button:hover { border-color: var(--green); color: var(--green); }
.review-actions button[data-review-action="mastered"] { color: white; border-color: var(--green); background: var(--green); }
.review-actions .review-reopen { grid-column: 1 / -1; color: var(--green); background: rgba(184,223,69,.16); }
.review-actions .review-delete { grid-column: 1 / -1; color: #a43b2a; border-color: rgba(164,59,42,.28); background: rgba(226,104,82,.08); }
.review-actions .review-delete:hover { color: #852b1d; border-color: #a43b2a; background: rgba(226,104,82,.14); }
.review-history { border-top: 1px solid var(--line); padding-top: 10px; }
.review-history summary { min-height: 30px; cursor: pointer; color: var(--green); font-size: 12px; font-weight: 800; }
.review-history ul { margin: 7px 0 0; padding-left: 18px; color: var(--muted); font-size: 12px; line-height: 1.65; }

.textbook-heading,
.unit-overview,
.catalog-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.textbook-heading { margin-bottom: 22px; }
.textbook-heading .eyebrow { margin-bottom: 10px; }
.textbook-heading h2 { margin: 0; font: 500 38px/1.1 Georgia, serif; letter-spacing: -1.5px; }
.textbook-heading p:not(.eyebrow) { margin: 9px 0 0; color: var(--muted); font-size: 14px; }
.catalog-total { flex: 0 0 auto; color: var(--green); font: 800 11px/1 ui-monospace, monospace; }

.textbook-module-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.textbook-module-card {
  min-width: 0;
  min-height: 190px;
  padding: 24px;
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 13px;
  border: 1px solid var(--line);
  border-radius: 19px;
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  box-shadow: 0 14px 36px rgba(22, 51, 40, .07);
}
.textbook-module-card:hover,
.textbook-module-card:focus-visible { border-color: var(--green); transform: translateY(-2px); }
.textbook-module-card strong { font: 600 27px/1.1 Georgia, serif; }
.textbook-module-card strong + span { color: var(--muted); font-size: 14px; line-height: 1.65; }
.textbook-module-card .module-count { margin-top: auto; color: var(--green); font: 800 11px/1.3 ui-monospace, monospace; }
.module-index { color: var(--green); font: 800 9px/1.2 ui-monospace, monospace; letter-spacing: 1.2px; }

.library-search { margin-top: 22px; padding: 18px; border: 1px solid var(--line); border-radius: 17px; background: rgba(255,255,255,.64); }
.library-search > label { display: block; margin-bottom: 9px; color: var(--green); font-size: 12px; font-weight: 900; }
.library-search > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; }
.library-search input,
.knowledge-filter-search input { width: 100%; min-width: 0; padding: 13px 15px; border: 1px solid var(--line); border-radius: 11px; background: white; color: var(--ink); font-size: 16px; }
.library-search button,
.library-back-button { padding: 11px 18px; border: 1px solid var(--green); border-radius: 11px; background: var(--green); color: white; cursor: pointer; font-weight: 900; }
.library-search-results { margin-top: 12px; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 9px; }
.library-search-result { min-width: 0; padding: 14px; display: flex; align-items: flex-start; gap: 11px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); color: var(--ink); cursor: pointer; text-align: left; }
.library-search-result > span:first-child { flex: 0 0 auto; color: var(--green); font-size: 11px; font-weight: 900; }
.library-search-result > span:last-child { min-width: 0; display: grid; gap: 5px; }
.library-search-result strong { overflow-wrap: anywhere; font-size: 15px; }
.library-search-result small { color: var(--muted); line-height: 1.45; }

.library-module-heading { margin: 8px 0 18px; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 18px; }
.library-module-heading h3 { margin: 5px 0 3px; font: 600 31px/1.1 Georgia, serif; }
.library-module-heading p { margin: 0; color: var(--muted); font-size: 13px; }
.library-back-button { align-self: stretch; color: var(--green); background: transparent; }

.knowledge-selectors { grid-template-columns: minmax(180px, 320px); }
.knowledge-filter-search { margin: 14px 0; display: grid; grid-template-columns: auto minmax(0, 440px); align-items: center; justify-content: end; gap: 10px; color: var(--muted); font-size: 12px; font-weight: 800; }
.knowledge-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 13px; }
.knowledge-card { min-width: 0; padding: 20px; display: flex; flex-direction: column; gap: 11px; border: 1px solid var(--line); border-radius: 17px; background: var(--card); box-shadow: 0 12px 28px rgba(22,51,40,.06); }
.knowledge-type-badge { align-self: flex-start; padding: 5px 9px; border-radius: 99px; background: rgba(184,223,69,.28); color: var(--green); font-size: 10px; font-weight: 900; }
.knowledge-card h4 { margin: 0; overflow-wrap: anywhere; font: 600 23px/1.25 Georgia, serif; }
.knowledge-card p { margin: 0; }
.knowledge-meaning { color: var(--ink); font-size: 15px; line-height: 1.55; }
.knowledge-meta { color: var(--green); font-size: 11px; font-weight: 800; line-height: 1.45; }
.knowledge-example { flex: 1 1 auto; padding: 12px; border-radius: 11px; background: #f3f0e7; font-size: 14px; line-height: 1.6; overflow-wrap: anywhere; }
.knowledge-card-actions,
.knowledge-dialog-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.knowledge-card-actions button,
.knowledge-dialog-actions button { min-height: 44px; padding: 9px 13px; border: 1px solid var(--line); border-radius: 10px; background: white; color: var(--ink); cursor: pointer; font-weight: 800; }
.knowledge-card-actions button:last-child,
.knowledge-dialog-actions button:last-child { border-color: var(--green); color: white; background: var(--green); }

.knowledge-dialog { width: min(680px, calc(100vw - 28px)); max-height: min(82vh, 760px); padding: 0; overflow-x: hidden; overflow-y: auto; border: 1px solid var(--line); border-radius: 20px; background: var(--card); color: var(--ink); box-shadow: 0 30px 90px rgba(10,35,28,.28); }
.knowledge-dialog::backdrop { background: rgba(8,29,24,.55); }
.knowledge-dialog-head { padding: 16px 18px 0; display: flex; align-items: center; justify-content: space-between; }
.knowledge-dialog-head button { width: 44px; height: 44px; border: 0; border-radius: 50%; background: #ece9df; cursor: pointer; font-size: 24px; }
#knowledge-dialog-content { padding: 4px 24px 25px; }
#knowledge-dialog-content > h3 { margin: 7px 0; overflow-wrap: anywhere; font: 600 32px/1.2 Georgia, serif; }
.knowledge-detail-section { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); }
.knowledge-detail-section h4 { margin: 0 0 8px; color: var(--green); font-size: 13px; }
.knowledge-detail-section p { margin: 6px 0 0; white-space: pre-line; font-size: 16px; line-height: 1.65; overflow-wrap: anywhere; }
.knowledge-formula { padding: 14px; border: 0; border-radius: 12px; background: var(--ink); color: white; }
.knowledge-formula h4 { color: var(--lime); }

.textbook-review-entry { border-style: dashed; background: linear-gradient(145deg, #f3f7e7, var(--card)); }
.lexicon-preview-entry { border-style: dashed; background: linear-gradient(145deg, #eef7f3, var(--card)); }
.sense-human-review-entry { border-style: dashed; background: linear-gradient(145deg, #fff1e9, var(--card)); }
.lexicon-preview-center { min-width: 0; }
.lexicon-preview-search { margin: 18px 0; padding: 16px; border: 1px solid var(--line); border-radius: 16px; background: var(--card); }
.lexicon-preview-search > label { display: block; margin-bottom: 7px; color: var(--green); font-size: 12px; font-weight: 850; }
.lexicon-preview-search > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; }
.lexicon-preview-search input,
.lexicon-preview-search button { min-height: 44px; border: 1px solid var(--line); border-radius: 11px; font-size: 15px; }
.lexicon-preview-search input { min-width: 0; padding: 0 13px; background: white; }
.lexicon-preview-search button { padding: 0 18px; color: white; border-color: var(--green); background: var(--green); cursor: pointer; font-weight: 800; }
.lexicon-headword-node { min-width: 0; padding: 18px; border: 1px solid var(--line); border-radius: 18px; background: var(--card); box-shadow: 0 13px 34px rgba(22,51,40,.06); }
.lexicon-headword-node > header { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 16px; }
.lexicon-headword-node h4 { margin: 0; color: var(--ink); font: 600 28px/1.2 Georgia, serif; }
.lexicon-headword-node code,
.lexicon-sense-node code { color: var(--muted); overflow-wrap: anywhere; }
.lexicon-sense-list { margin-top: 14px; display: grid; gap: 12px; }
.lexicon-sense-node { min-width: 0; padding: 15px; border-left: 4px solid var(--lime); border-radius: 0 13px 13px 0; background: rgba(184,223,69,.09); }
.lexicon-sense-node h5 { margin: 0 0 5px; font-size: 18px; }
.lexicon-sense-node ul { margin: 12px 0 0; padding: 0; display: grid; gap: 8px; list-style: none; }
.lexicon-sense-node li { min-width: 0; padding: 11px 13px; display: grid; gap: 4px; border: 1px solid var(--line); border-radius: 11px; background: rgba(255,255,255,.72); }
.lexicon-sense-node li strong { color: var(--green); font-size: 13px; }
.lexicon-sense-node li span { color: var(--muted); font-size: 12px; }
.textbook-review-center { min-width: 0; }
.review-preview-button,
.review-page-toolbar button,
.review-decision-actions button { min-height: 44px; padding: 10px 14px; border: 1px solid var(--green); border-radius: 10px; background: white; color: var(--green); cursor: pointer; font-weight: 850; }
.review-preview-button { background: var(--green); color: white; }
.review-stat-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 9px; margin-bottom: 14px; }
.review-stat-grid span { min-width: 0; padding: 14px; display: grid; gap: 6px; border: 1px solid var(--line); border-radius: 13px; background: var(--card); color: var(--muted); font-size: 11px; }
.review-stat-grid strong { color: var(--ink); font-size: 23px; }
.review-admin-filters { padding: 12px; display: grid; grid-template-columns: repeat(6, minmax(120px, 1fr)); gap: 9px; border: 1px solid var(--line); border-radius: 16px; background: var(--card); }
.review-admin-filters label,
.review-candidate-editor label { min-width: 0; display: grid; gap: 6px; color: var(--muted); font-size: 11px; font-weight: 800; }
.review-admin-filters select,
.review-candidate-editor input,
.review-candidate-editor textarea,
.review-match-suggestion select,
.review-edit-details > textarea { width: 100%; min-width: 0; min-height: 44px; padding: 9px 11px; border: 1px solid var(--line); border-radius: 9px; background: white; color: var(--ink); font-size: 14px; }
.review-page-toolbar { margin: 12px 0; display: flex; align-items: center; justify-content: flex-end; gap: 10px; }
.review-page-toolbar span { color: var(--muted); font-size: 12px; }
.review-candidate-list { display: grid; gap: 13px; }
.review-candidate-card { min-width: 0; padding: 20px; display: grid; gap: 15px; border: 1px solid var(--line); border-radius: 17px; background: var(--card); box-shadow: 0 12px 30px rgba(22,51,40,.06); }
.review-candidate-card > header { display: flex; align-items: flex-start; justify-content: space-between; gap: 15px; }
.review-candidate-card h4 { margin: 8px 0 5px; overflow-wrap: anywhere; font: 600 24px/1.25 Georgia, serif; }
.review-candidate-card code { overflow-wrap: anywhere; color: var(--muted); font-size: 11px; }
.review-candidate-status { flex: 0 0 auto; padding: 7px 10px; border-radius: 99px; background: #ece9df; color: var(--muted); font-size: 11px; }
.review-candidate-status.status-reviewed,
.review-candidate-status.status-published { background: rgba(184,223,69,.3); color: var(--green); }
.review-candidate-status.status-rejected { background: rgba(239,118,92,.18); color: #9f3827; }
.review-evidence { padding: 12px; display: grid; gap: 7px; border-left: 3px solid var(--lime); background: #f4f6e9; }
.review-evidence p { margin: 0; font-size: 13px; font-weight: 800; }
.review-evidence a { justify-self: start; color: var(--green); font-weight: 850; }
.review-match-suggestion { display: grid; grid-template-columns: auto minmax(0, 1fr) minmax(190px, 320px); align-items: center; gap: 10px; }
.review-match-suggestion p { margin: 0; color: var(--muted); font-size: 12px; }
.review-precheck { padding: 13px 15px; display: grid; grid-template-columns: auto auto; align-items: center; justify-content: start; gap: 7px 11px; border: 1px solid rgba(29,108,79,.25); border-radius: 12px; background: #f3f8e8; }
.review-precheck strong { color: var(--green); font-size: 14px; }
.review-precheck span { padding: 4px 8px; border-radius: 99px; background: white; color: var(--muted); font-size: 11px; font-weight: 800; }
.review-precheck p, .review-precheck small { grid-column: 1 / -1; margin: 0; overflow-wrap: anywhere; }
.review-precheck p { color: var(--ink); font-size: 13px; }
.review-precheck small { color: var(--muted); font-size: 11px; }
.review-edit-details { border-top: 1px solid var(--line); padding-top: 12px; }
.review-edit-details summary { min-height: 44px; display: flex; align-items: center; color: var(--green); cursor: pointer; font-weight: 850; }
.review-candidate-editor { margin: 8px 0 12px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.review-candidate-editor textarea { min-height: 86px; resize: vertical; }
.review-decision-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.review-decision-actions button:first-child,
.review-decision-actions button:nth-child(3) { background: var(--green); color: white; }
.review-decision-actions button:last-child { border-color: #b64b3a; color: #9f3827; }
.review-preview-result { color: var(--green); font-size: 13px; font-weight: 800; }

.textbook-selectors {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 16px 45px rgba(22, 51, 40, .08);
}

.textbook-selectors label {
  min-width: 0;
  padding: 11px 14px;
  border-right: 1px solid var(--line);
}
.textbook-selectors label:last-child { border-right: 0; }
.textbook-selectors span { display: block; margin-bottom: 6px; color: var(--muted); font: 800 9px/1 ui-monospace, monospace; letter-spacing: 1px; }
.textbook-selectors select { width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); font-weight: 800; }

.unit-overview {
  margin-top: 16px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--ink);
  color: white;
}
.unit-context { color: var(--lime); font: 800 9px/1 ui-monospace, monospace; letter-spacing: 1.2px; }
.unit-overview h3 { margin: 7px 0 0; font: 500 28px/1 Georgia, serif; }
.unit-overview p { max-width: 450px; margin: 7px 0 0; color: rgba(255,255,255,.65); font-size: 11px; line-height: 1.5; }
.unit-counts { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 18px; }
.unit-counts span { color: rgba(255,255,255,.66); font-size: 11px; white-space: nowrap; }
.unit-counts strong { color: white; font-size: 16px; }
.start-unit-button { flex: 0 0 auto; padding: 13px 18px; border: 0; border-radius: 12px; background: var(--lime); cursor: pointer; font-weight: 900; }
.start-unit-button:disabled { cursor: default; opacity: .45; }

.catalog-toolbar { margin: 18px 0 13px; justify-content: flex-end; }
.catalog-toolbar label { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 11px; font-weight: 800; }
.catalog-toolbar select { padding: 8px 11px; border: 1px solid var(--line); border-radius: 9px; background: var(--card); color: var(--ink); font-weight: 700; }
.textbook-word-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(235px, 1fr)); gap: 12px; }
.catalog-empty { padding: 45px; color: var(--muted); text-align: center; }

.textbook-word-card {
  min-width: 0;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--card);
  box-shadow: 0 9px 24px rgba(22, 51, 40, .055);
}
.textbook-word-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.textbook-word-heading h4 { min-width: 0; margin: 0; overflow-wrap: anywhere; font: 500 26px/1 Georgia, serif; letter-spacing: -.5px; }
.word-status { flex: 0 0 auto; padding: 5px 8px; border-radius: 99px; background: #ece9df; color: var(--muted); font-size: 9px; font-weight: 900; }
.word-status.status-mastered { color: #155d48; background: rgba(184, 223, 69, .34); }
.word-status.status-review { color: #9f3827; background: rgba(239, 118, 92, .18); }
.word-status.status-learning { color: #785a00; background: rgba(247, 200, 75, .28); }
.textbook-word-details { min-height: 82px; }
.textbook-word-details p { margin: 0; }
.card-phonetic { color: var(--green); font: 600 12px/1.4 ui-monospace, monospace; }
.card-translation { margin-top: 7px !important; color: var(--ink); font-size: 13px; }
.card-context { margin-top: 10px !important; color: var(--muted); font-size: 10px; line-height: 1.45; }
.textbook-card-actions { margin-top: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.textbook-card-actions button { padding: 9px 7px; border: 1px solid var(--line); border-radius: 9px; background: white; cursor: pointer; font-size: 11px; font-weight: 800; }
.textbook-card-actions button:last-child { border-color: var(--green); color: white; background: var(--green); }
.textbook-card-actions button:hover { transform: translateY(-1px); }

.unit-learning-bar {
  margin-bottom: 14px;
  padding: 14px 17px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--card);
  box-shadow: 0 10px 30px rgba(22, 51, 40, .08);
}
.unit-learning-bar > div:first-child { display: flex; align-items: baseline; flex-wrap: wrap; gap: 8px; }
.unit-learning-bar span { color: var(--green); font: 800 9px/1 ui-monospace, monospace; letter-spacing: 1px; }
.unit-learning-bar strong { font-size: 14px; }
.unit-learning-bar small { color: var(--muted); }
.unit-learning-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; }
.unit-learning-actions button { padding: 9px 12px; border: 1px solid var(--line); border-radius: 9px; background: white; cursor: pointer; font-size: 11px; font-weight: 800; }
.unit-learning-actions button:hover:not(:disabled) { border-color: var(--green); color: var(--green); }
.unit-learning-actions button:disabled { cursor: default; opacity: .35; }
.unit-learning-actions #unit-master-button { border-color: var(--green); }
.unit-learning-actions #unit-review-button { border-color: var(--coral); }
.unit-learning-actions #unit-master-button.selected { color: white; background: var(--green); }
.unit-learning-actions #unit-review-button.selected { color: white; background: var(--coral); }

.poster-shell {
  max-width: 1520px;
  margin: 0 auto 100px;
  padding: 0 30px;
}

.learning-workspace {
  display: grid;
  grid-template-columns: minmax(560px, 1.18fr) minmax(390px, .82fr);
  gap: 24px;
  align-items: start;
}

.poster-column { min-width: 0; }

.poster-status {
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
  font: 700 10px/1 ui-monospace, monospace;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin: 0 0 12px 3px;
}

.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
.poster-status.loading .status-dot { background: var(--yellow); animation: pulse 1s infinite; }
.poster-status.error .status-dot { background: var(--coral); }
.poster-status.library-hit .status-dot { background: var(--lime); box-shadow: 0 0 0 5px rgba(184, 223, 69, .18); }

.poster-card {
  overflow: hidden;
  border: 1px solid rgba(17, 43, 42, .25);
  background: var(--card);
  box-shadow: 0 28px 80px rgba(22, 51, 40, .14);
  border-radius: 4px;
}

.library-poster-card {
  overflow: hidden;
  border: 1px solid rgba(17, 43, 42, .25);
  background: var(--card);
  box-shadow: 0 28px 80px rgba(22, 51, 40, .14);
  border-radius: 4px;
}

.library-poster-toolbar {
  padding: 24px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--line);
  background-image: linear-gradient(rgba(31, 107, 84, .045) 1px, transparent 1px), linear-gradient(90deg, rgba(31, 107, 84, .045) 1px, transparent 1px);
  background-size: 22px 22px;
}

.library-hit-badge {
  color: var(--green);
  font: 800 9px/1 ui-monospace, monospace;
  letter-spacing: 1.5px;
}

.library-hit-badge i {
  width: 7px;
  height: 7px;
  display: inline-block;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(184, 223, 69, .18);
}

.library-poster-toolbar h2 {
  margin: 5px 0 3px;
  font: 500 clamp(42px, 7vw, 68px)/1 Georgia, serif;
  letter-spacing: -3px;
}

.library-poster-toolbar p {
  margin: 0;
  color: var(--muted);
  font: 600 10px/1.5 ui-monospace, monospace;
}

.poster-version-bar {
  padding: 13px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--line);
  background: #f4f0e5;
}

.poster-version-bar[hidden] { display: none; }
.poster-version-copy { display: flex; align-items: center; gap: 12px; min-width: 0; }
.poster-version-copy > span { flex: 0 0 auto; color: var(--muted); font: 800 9px/1 ui-monospace, monospace; letter-spacing: 1px; }
.poster-version-options { display: flex; flex-wrap: wrap; gap: 7px; }

.poster-version-button,
.generate-grade-poster-button {
  border: 1px solid var(--line);
  border-radius: 99px;
  background: white;
  color: var(--ink);
  cursor: pointer;
  padding: 8px 12px;
  font-size: 11px;
  font-weight: 800;
}

.poster-version-button:hover,
.poster-version-button.active { border-color: var(--green); background: var(--green); color: white; }

.tutor-context-summary {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}
.generate-grade-poster-button { flex: 0 0 auto; border-color: var(--coral); color: #9f3827; background: #fff7f4; }
.generate-grade-poster-button:hover { background: var(--coral); color: var(--ink); }

.library-poster-stage {
  padding: clamp(14px, 3vw, 34px);
  display: grid;
  place-items: center;
  background: #e8e2d4;
  background-image: radial-gradient(rgba(17, 43, 42, .12) .7px, transparent .7px);
  background-size: 12px 12px;
}

.library-poster-stage img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: 1180px;
  object-fit: contain;
  background: white;
  box-shadow: 0 18px 45px rgba(17, 43, 42, .18);
}

.poster-image-wrap {
  position: relative;
  width: fit-content;
  max-width: 100%;
  line-height: 0;
}

.poster-hotspots { position: absolute; inset: 0; }

.reading-build-button {
  margin: 10px 0 0;
  padding: 8px 12px;
  border: 1px solid rgba(17, 43, 42, .28);
  border-radius: 6px;
  color: var(--ink);
  background: #f7f3e8;
  cursor: pointer;
}
.reading-build-button:hover, .reading-build-button:focus-visible { border-color: var(--lime); background: #eef6cf; }
.reading-build-button:disabled { cursor: wait; opacity: .6; }

.poster-hotspot {
  position: absolute;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.poster-hotspot span {
  position: absolute;
  pointer-events: none;
  left: 8px;
  top: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  color: white;
  background: rgba(17, 43, 42, .88);
  font: 800 9px/1 ui-sans-serif, sans-serif;
  line-height: 1;
  opacity: 0;
  transform: translateY(4px);
  white-space: nowrap;
  transition: .18s ease;
}

.poster-hotspot:hover, .poster-hotspot:focus-visible {
  outline: 0;
  border-color: var(--lime);
  background: rgba(184, 223, 69, .13);
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.72);
}

.poster-hotspot.active {
  border-color: var(--coral);
  background: rgba(239, 118, 92, .16);
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.84), 0 0 0 2px rgba(239,118,92,.3);
}

.poster-hotspot.active span { opacity: 1; transform: translateY(0); background: var(--coral); }

.poster-hotspot:hover span, .poster-hotspot:focus-visible span { opacity: 1; transform: translateY(0); }

.poster-panel-boundary {
  position: absolute;
  z-index: 2;
  pointer-events: none;
  border: 2px dashed rgba(32, 116, 93, .72);
  border-radius: 9px;
  background: rgba(32, 116, 93, .035);
}

.poster-panel-boundary::before {
  content: attr(data-panel-label);
  position: absolute;
  left: 2px;
  bottom: 2px;
  padding: 3px 5px;
  border-radius: 4px;
  color: #fff;
  background: rgba(9, 55, 50, .86);
  font: 700 7px/1.1 ui-monospace, monospace;
}

.poster-hotspot.diagnostic-nonclickable {
  pointer-events: none;
  cursor: default;
  border-style: dotted;
  border-color: rgba(99, 112, 109, .6);
  background: rgba(99, 112, 109, .06);
}
.hotspot-intro { left: 0; top: 0; width: 100%; height: 15%; }
.hotspot-usage { left: 0; top: 15%; width: 29%; height: 43%; }
.hotspot-words { left: 29%; top: 15%; width: 45%; height: 43%; }
.hotspot-examples { right: 0; top: 15%; width: 26%; height: 43%; }
.hotspot-reading { left: 0; top: 58%; width: 100%; height: 20%; }
.hotspot-test { left: 0; top: 78%; width: 100%; height: 17%; }

.library-poster-footer {
  min-height: 58px;
  padding: 0 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: var(--lime);
  font-size: 12px;
  font-weight: 700;
}

.library-poster-footer strong {
  font: 800 9px/1 ui-monospace, monospace;
  letter-spacing: 1.2px;
}

.reading-diagnostic {
  padding: 22px;
  border-top: 1px solid rgba(17, 43, 42, .14);
  background: #f6f4ec;
  line-height: 1.45;
}

.reading-diagnostic-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.reading-diagnostic-head span {
  color: var(--forest);
  font: 800 10px/1 ui-monospace, monospace;
  letter-spacing: 1.4px;
}

.reading-diagnostic-head h3 { margin: 6px 0 0; font-size: 20px; }
.reading-diagnostic-head > strong { padding: 7px 10px; border-radius: 999px; background: #e6efdc; }
.reading-diagnostic-head > strong[data-status="warning"] { background: #fff0c4; }
.reading-diagnostic-head > strong[data-status="blocked"],
.reading-diagnostic-head > strong[data-status="safe_fallback"] { background: #ffd9d0; }
.reading-diagnostic > p { margin: 12px 0; color: #50615c; overflow-wrap: anywhere; }

.reading-diagnostic-units { display: grid; gap: 8px; }
.reading-diagnostic-unit {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px;
  border: 1px solid rgba(17, 43, 42, .13);
  border-radius: 12px;
  background: #fff;
}
.reading-diagnostic-unit p { margin: 3px 0; font-size: 14px; overflow-wrap: anywhere; }
.reading-diagnostic-unit small { color: #60716c; overflow-wrap: anywhere; }
.reading-diagnostic-unit button { min-height: 44px; flex: 0 0 auto; }

.poster-head {
  min-height: 200px;
  padding: 35px 43px 29px;
  display: flex;
  justify-content: space-between;
  align-items: end;
  border-bottom: 1px solid var(--line);
  background-image: linear-gradient(rgba(31, 107, 84, .045) 1px, transparent 1px), linear-gradient(90deg, rgba(31, 107, 84, .045) 1px, transparent 1px);
  background-size: 22px 22px;
}

.part-of-speech, .section-tag {
  display: block;
  color: var(--green);
  font: 800 10px/1 ui-monospace, monospace;
  letter-spacing: 1.7px;
}

.word-row { display: flex; align-items: center; gap: 22px; }

.word-row h2 {
  margin: 4px 0 0;
  font: 500 clamp(64px, 10vw, 112px)/.92 Georgia, serif;
  letter-spacing: -6px;
}

.phonetic { color: var(--muted); margin-top: 12px; font: 600 15px/1 ui-monospace, monospace; }

.speak-button, .read-intro-button {
  border: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.speak-button {
  gap: 9px;
  border: 1px solid var(--line);
  background: white;
  border-radius: 99px;
  padding: 10px 15px;
  font-size: 12px;
  font-weight: 800;
  box-shadow: 0 5px 12px rgba(17, 43, 42, .06);
}

.speak-button:hover { border-color: var(--green); }
.sound-bars { height: 16px; display: flex; gap: 2px; align-items: center; }
.sound-bars i { width: 2px; height: 5px; background: var(--green); border-radius: 2px; }
.sound-bars i:nth-child(2) { height: 12px; }
.sound-bars i:nth-child(3) { height: 8px; }
.sound-bars i:nth-child(4) { height: 14px; }
.speaking .sound-bars i { animation: sound .65s ease-in-out infinite alternate; }
.speaking .sound-bars i:nth-child(2) { animation-delay: -.3s; }
.speaking .sound-bars i:nth-child(3) { animation-delay: -.1s; }

.poster-index {
  color: var(--muted);
  font: 800 9px/1.5 ui-monospace, monospace;
  text-align: right;
  letter-spacing: 1.2px;
  padding-bottom: 10px;
}
.poster-index strong { color: var(--ink); font-size: 16px; }

.poster-grid { display: grid; grid-template-columns: 1.08fr .92fr; }
.poster-grid > section { min-width: 0; }

.visual-panel {
  min-height: 455px;
  position: relative;
  overflow: hidden;
  background: #dbe9c8;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.visual-panel img { width: 100%; height: 100%; position: absolute; inset: 0; object-fit: cover; }
.visual-panel::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(8, 28, 22, .67)); pointer-events: none; }

.image-fallback { position: absolute; inset: 0; display: grid; place-items: center; background: radial-gradient(circle at 55% 40%, #f8dd67, #b8df45 42%, #4a8b67 100%); overflow: hidden; }
.fallback-icon { position: relative; z-index: 2; font-size: 140px; filter: drop-shadow(0 20px 10px rgba(17, 43, 42, .17)); }
.fallback-orbit { position: absolute; border: 2px solid rgba(255,255,255,.48); border-radius: 50%; transform: rotate(-18deg); }
.orbit-one { width: 340px; height: 150px; }
.orbit-two { width: 470px; height: 220px; }

.image-caption { position: absolute; z-index: 3; left: 30px; bottom: 27px; color: white; display: flex; flex-direction: column; gap: 7px; }
.image-caption span { font: 800 9px/1 ui-monospace, monospace; letter-spacing: 1.6px; opacity: .74; }
.image-caption strong { font: 500 21px/1.2 Georgia, serif; }

.meaning-panel { padding: 38px; border-bottom: 1px solid var(--line); }
.definition { font: 500 24px/1.38 Georgia, serif; margin: 17px 0 10px; letter-spacing: -.35px; }
.translation { color: var(--muted); margin: 0; font-size: 13px; }
.mini-rule { height: 1px; background: var(--line); margin: 28px 0; }

.word-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.word-links span { border: 1px solid var(--line); background: white; border-radius: 99px; padding: 8px 12px; font: 600 13px/1 Georgia, serif; }

.ai-panel {
  grid-column: 1 / -1;
  padding: 37px 42px;
  background: var(--ink);
  color: white;
  position: relative;
}
.ai-panel::before { content: "“"; position: absolute; right: 39px; top: 8px; color: rgba(255,255,255,.06); font: 150px/1 Georgia, serif; }
.ai-label { color: var(--lime); font: 800 10px/1 ui-monospace, monospace; letter-spacing: 1.5px; }
.ai-label span { font-size: 16px; }
.ai-label small { margin-left: 10px; padding: 5px 7px; border: 1px solid rgba(184,223,69,.32); border-radius: 4px; font-size: 8px; }
.ai-panel p { position: relative; max-width: 780px; font: 400 20px/1.55 Georgia, serif; letter-spacing: -.15px; margin: 22px 0; }

.read-intro-button { color: white; gap: 8px; border-radius: 99px; border: 1px solid rgba(255,255,255,.23); background: rgba(255,255,255,.07); padding: 9px 14px; font-size: 11px; font-weight: 800; }
.read-intro-button:hover { background: rgba(255,255,255,.13); }
.read-intro-button svg { width: 12px; fill: currentColor; }

.examples-panel { padding: 39px 42px; border-right: 1px solid var(--line); }
.examples-panel ol { list-style: none; padding: 0; margin: 20px 0 0; counter-reset: ex; }
.examples-panel li { counter-increment: ex; position: relative; padding-left: 30px; margin: 0 0 18px; font: 500 16px/1.5 Georgia, serif; }
.examples-panel li::before { content: counter(ex, decimal-leading-zero); position: absolute; left: 0; top: 4px; color: var(--coral); font: 800 9px/1 ui-monospace, monospace; }
mark { background: transparent; color: var(--green); font-weight: 700; }

.challenge-panel {
  padding: 39px 42px;
  display: flex;
  justify-content: space-between;
  background: var(--coral);
  color: var(--ink);
}
.section-tag.light { color: rgba(17,43,42,.67); }
.challenge-panel p { margin: 20px 0 0; max-width: 310px; font: 500 21px/1.4 Georgia, serif; }
.pencil { align-self: end; font-size: 42px; transform: rotate(-8deg); }

.poster-footer {
  min-height: 70px;
  padding: 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--lime);
  font: 900 clamp(14px, 2vw, 20px)/1 ui-sans-serif, sans-serif;
  letter-spacing: 1.2px;
}
.poster-footer i { width: 5px; height: 5px; border-radius: 50%; background: var(--ink); opacity: .45; }

.tap-module { cursor: pointer; transition: box-shadow .18s ease, filter .18s ease; }
.tap-module:hover { box-shadow: inset 0 0 0 3px var(--lime); filter: saturate(1.06); }

.tutor-panel {
  position: sticky;
  top: 18px;
  align-self: start;
  min-width: 0;
  height: calc(100vh - 36px);
  max-height: calc(100vh - 36px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(17, 43, 42, .22);
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 25px 70px rgba(22, 51, 40, .13);
}

.tutor-header {
  flex: 0 0 auto;
  padding: 22px 23px 17px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: var(--ink);
  color: white;
}

.tutor-kicker {
  color: var(--lime);
  font: 800 9px/1 ui-monospace, monospace;
  letter-spacing: 1.6px;
}

.tutor-header h2 {
  margin: 6px 0 0;
  font: 500 33px/1 Georgia, serif;
  letter-spacing: -1px;
}

.tutor-header h2 small {
  display: block;
  margin-top: 7px;
  color: rgba(255,255,255,.58);
  font: 700 9px/1 ui-sans-serif, sans-serif;
  letter-spacing: .8px;
}

.tutor-play-all {
  flex: 0 0 auto;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 7px;
  border: 1px solid rgba(184, 223, 69, .4);
  border-radius: 99px;
  background: rgba(184, 223, 69, .1);
  color: var(--lime);
  cursor: pointer;
  font-size: 11px;
  font-weight: 800;
}

.tutor-play-all:hover { background: rgba(184, 223, 69, .2); }
.tutor-play-all svg { width: 12px; fill: currentColor; }

.now-reading {
  min-height: 0;
  padding: 14px 18px;
  display: flex;
  align-items: flex-start;
  gap: 11px;
  border-bottom: 1px solid var(--line);
  background: #eff5de;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.now-reading-main { min-width: 0; flex: 1; }

.now-reading-icon {
  width: 27px;
  height: 27px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--lime);
}

.now-reading small {
  color: var(--green);
  font: 800 var(--reading-label-size)/1.35 ui-monospace, monospace;
  letter-spacing: 1.1px;
}

.reading-meta-row {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 8px;
}

.voice-picker {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: var(--reading-voice-size);
  font-weight: 800;
}

.voice-pickers {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 5px 8px;
}

.voice-picker select {
  max-width: 220px;
  min-height: 34px;
  padding: 0 24px 0 9px;
  border: 1px solid rgba(31, 107, 84, .22);
  border-radius: 99px;
  outline: none;
  background: white;
  color: var(--green);
  cursor: pointer;
  font: 700 var(--reading-voice-size)/1.2 system-ui, sans-serif;
}

.voice-picker select:focus { border-color: var(--green); box-shadow: 0 0 0 2px rgba(31, 107, 84, .12); }
.voice-picker select:disabled { cursor: default; opacity: .55; }

#tts-engine {
  margin-left: 6px;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0;
}

.speech-pause-button {
  flex: 0 0 auto;
  min-width: 72px;
  padding: 8px 10px;
  border: 1px solid rgba(31, 107, 84, .25);
  border-radius: 99px;
  background: white;
  color: var(--green);
  cursor: pointer;
  font-size: var(--reading-label-size);
  font-weight: 800;
}

.speech-pause-button:hover:not(:disabled), .speech-pause-button.paused { background: var(--green); color: white; }
.speech-pause-button:disabled { cursor: default; opacity: .42; }

.now-reading-content {
  min-width: 0;
  margin-top: .65rem;
  color: #263c34;
  font-size: var(--reading-text-size);
  line-height: var(--reading-line-height);
  overflow-wrap: anywhere;
}

.now-reading-content p { margin: 0; }
.now-reading-title {
  color: #174838;
  font-size: var(--reading-title-size);
  font-weight: 700;
  line-height: 1.45;
}
.now-reading-lines { display: grid; gap: var(--reading-item-gap); }
.now-reading-title + .now-reading-lines { margin-top: var(--reading-item-gap); }
.now-reading-line { min-width: 0; }
.now-reading-list {
  margin: var(--reading-item-gap) 0 0;
  padding: 0;
  display: grid;
  gap: var(--reading-item-gap);
  list-style: none;
}
.now-reading-list li { min-width: 0; }
.now-reading-list-button {
  position: relative;
  width: 100%;
  padding: 0 0 0 1.15em;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  line-height: inherit;
  text-align: left;
  white-space: normal;
  overflow-wrap: anywhere;
}
.now-reading-list-button::before {
  position: absolute;
  left: 0;
  content: "•";
  color: var(--green);
  font-weight: 900;
}
.now-reading-list-button:hover, .now-reading-list-button:focus-visible { color: #0f5a42; }

@media (max-width: 720px) {
  :root {
    --reading-title-size: .9375rem;
    --reading-text-size: 1rem;
  }
  .voice-picker select { max-width: 100%; }
}

@media (max-width: 520px) {
  .now-reading {
    display: grid;
    grid-template-columns: 27px minmax(0, 1fr);
    padding-inline: 14px;
  }
  .now-reading-main { grid-column: 2; }
  .voice-pickers { align-items: flex-start; flex-direction: column; }
  .voice-picker { max-width: 100%; flex-wrap: wrap; }
  .speech-pause-button { grid-column: 2; justify-self: start; margin-top: 2px; }
}

.tutor-tabs {
  position: relative;
  z-index: 2;
  flex: 0 0 auto;
  padding: 9px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  border-bottom: 1px solid var(--line);
  background: white;
}

.tutor-tab {
  min-height: 38px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  touch-action: manipulation;
  font-size: 12px;
  font-weight: 800;
}

.tutor-tab::after {
  content: "+";
  margin-left: auto;
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
}

.tutor-tab span { margin-left: 4px; padding: 2px 5px; border-radius: 99px; background: var(--coral); color: white; font-size: 8px; }
.tutor-tab.active { background: var(--ink); color: white; }
.tutor-tab.active::after { content: "−"; }

.tutor-scroll {
  flex: 1 1 auto;
  min-height: 0;
  max-height: none;
  padding-bottom: 18px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}
.tutor-scroll[hidden] { display: none; }
.tutor-view { padding: 13px; }

.tutor-card {
  position: relative;
  padding: 19px 18px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: white;
  margin-bottom: 10px;
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}

.tutor-card.active {
  border-color: var(--green);
  background: #fbfdf2;
  box-shadow: 0 8px 22px rgba(31, 107, 84, .09);
  transform: translateY(-1px);
}

.tutor-card-index {
  color: var(--green);
  font: 800 8px/1 ui-monospace, monospace;
  letter-spacing: 1.2px;
}

.tutor-card h3 { margin: 7px 38px 12px 0; font: 700 16px/1.25 Georgia, serif; }
.tutor-card p { margin: 7px 0; font-size: 13px; line-height: 1.65; }
.tutor-card .zh { color: #48564f; }
.tutor-card .en { color: var(--ink); font-family: Georgia, serif; font-size: 14px; }

.card-speak {
  position: absolute;
  right: 14px;
  top: 14px;
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: white;
  color: var(--green);
  cursor: pointer;
  font-size: 9px;
}

.card-speak:hover, .card-speak.speaking { color: white; background: var(--green); }

.word-dna { display: grid; gap: 7px; margin: 0; }
.word-dna div { display: grid; grid-template-columns: 38px 1fr; gap: 9px; }
.word-dna dt { color: var(--green); font-size: 10px; font-weight: 800; }
.word-dna dd { margin: 0; color: #4d5c54; font-size: 11px; line-height: 1.55; }

.lesson-list { margin: 0; padding-left: 22px; }
.lesson-list li { padding-left: 3px; margin: 8px 0; font: 500 13px/1.5 Georgia, serif; }

.word-network { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.word-network > div { padding: 11px; border-radius: 10px; background: #f3f0e7; }
.word-network small { color: var(--green); font: 800 8px/1 ui-monospace, monospace; letter-spacing: 1px; }
.word-network ul { list-style: none; padding: 0; margin: 8px 0 0; }
.word-network li { margin: 5px 0; font: 600 12px/1.3 Georgia, serif; }
.reading-passage { font-family: Georgia, serif; color: #35463f; }

.test-intro { padding: 20px; border-radius: 13px; background: var(--coral); color: var(--ink); }
.test-intro span { font: 800 8px/1 ui-monospace, monospace; letter-spacing: 1.3px; }
.test-intro h3 { margin: 9px 0 6px; font: 700 20px/1.2 Georgia, serif; }
.test-intro p { margin: 0; font-size: 11px; line-height: 1.5; }

.test-section { padding: 20px 4px 8px; }
.test-section-head { display: flex; gap: 10px; align-items: center; margin: 0 6px 13px; }
.test-section-head > span { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--ink); color: white; font: 800 9px/1 ui-monospace, monospace; }
.test-section-head h3 { margin: 0; font-size: 14px; }
.test-section-head p { margin: 3px 0 0; color: var(--muted); font-size: 9px; }

.quiz-item { padding: 15px; margin-bottom: 9px; border: 1px solid var(--line); border-radius: 11px; background: white; }
.quiz-item > p { margin: 0 0 10px; font: 600 13px/1.45 Georgia, serif; }
.quiz-options { display: grid; gap: 6px; }
.quiz-option { padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: #faf8f1; text-align: left; cursor: pointer; font-size: 11px; line-height: 1.35; }
.quiz-option:hover { border-color: var(--green); }
.quiz-option.correct { color: #13533e; border-color: #58a26f; background: #e8f6e9; }
.quiz-option.wrong { color: #8b3222; border-color: var(--coral); background: #fff0ec; }
.quiz-option:disabled { cursor: default; }
.quiz-feedback { margin: 8px 0 0; color: var(--muted); font-size: 10px; line-height: 1.4; }
.test-reading-passage { margin: 0 6px 14px; padding: 14px; border-left: 3px solid var(--lime); background: #f5f2e9; font: 500 12px/1.65 Georgia, serif; }

.test-score { margin: 15px 4px 8px; padding: 17px; display: flex; align-items: center; justify-content: center; gap: 8px; border-radius: 12px; background: var(--ink); color: white; }
.test-score strong { color: var(--lime); font: 500 42px/1 Georgia, serif; }
.test-score span { color: rgba(255,255,255,.68); font-size: 10px; line-height: 1.4; }

.toast {
  position: fixed;
  z-index: 30;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 20px);
  background: var(--ink);
  color: white;
  border-radius: 99px;
  padding: 11px 18px;
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transition: .25s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.poster-card.refreshing, .library-poster-card.refreshing { animation: refresh .4s ease; }

@keyframes sound { to { height: 15px; } }
@keyframes pulse { 50% { opacity: .35; transform: scale(.7); } }
@keyframes refresh { 50% { opacity: .55; transform: translateY(3px); } }

@media (max-width: 768px) {
  .topbar { padding: 20px; gap: 12px; }
  .topbar-note { display: none; }
  .topbar-actions { gap: 7px; }
  .account-button, .lan-access-button { min-height: 44px; padding-inline: 11px; }
  .auth-card { padding: 24px 20px; }
  .hero { margin-top: 53px; padding: 0 19px; }
  .hero h1 { letter-spacing: -2px; }
  .search-panel { grid-template-columns: 1fr; gap: 6px; padding: 7px; }
  .search-field { min-height: 58px; }
  .grade-field { min-height: 56px; border-left: 0; border-top: 1px solid var(--line); padding-left: 51px; }
  .explore-button { min-height: 52px; }
  .learning-mode-tabs { width: 100%; flex-wrap: wrap; border-radius: 18px; }
  .learning-mode-tab { min-width: 0; min-height: 44px; flex: 1 1 calc(50% - 5px); padding-inline: 8px; }
  .textbook-library { padding: 0 14px; }
  .my-words-library { padding: 0 14px; }
  .unit-practice-library { padding: 0 14px; }
  .review-records-library { padding: 0 14px; }
  .my-words-toolbar { align-items: flex-start; flex-direction: column; }
  .textbook-heading { align-items: flex-start; flex-direction: column; }
  .textbook-module-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-stat-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .review-admin-filters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-match-suggestion { grid-template-columns: 1fr 1fr; }
  .review-match-suggestion p { grid-column: 1 / -1; }
  .textbook-module-card { min-height: 170px; padding: 20px; }
  .library-module-heading { grid-template-columns: 1fr; align-items: flex-start; }
  .library-back-button { width: 100%; min-height: 44px; }
  .knowledge-filter-search { grid-template-columns: 1fr; justify-content: stretch; }
  .knowledge-card-grid { grid-template-columns: 1fr; }
  .textbook-selectors { grid-template-columns: 1fr 1fr; }
  .textbook-selectors label { border-right: 0; border-bottom: 1px solid var(--line); }
  .unit-overview { align-items: flex-start; flex-direction: column; }
  .unit-counts { justify-content: flex-start; }
  .start-unit-button { width: 100%; }
  .catalog-toolbar { align-items: flex-start; justify-content: flex-start; flex-wrap: wrap; }
  .textbook-word-grid { grid-template-columns: 1fr; }
  .practice-research-card { grid-template-columns: 1fr; align-items: flex-start; }
  .practice-research-stats { justify-content: flex-start; }
  .practice-source-panel { grid-template-columns: 1fr; }
  .practice-source-panel li { align-items: flex-start; flex-direction: column; }
  .practice-paper { padding: 20px 14px; }
  .practice-paper-head { flex-direction: column; }
  .practice-paper-head h2 { font-size: 29px; }
  .practice-options { grid-template-columns: 1fr; }
  .practice-fill-question { grid-template-columns: 1fr; }
  .practice-submit-bar { align-items: flex-start; flex-direction: column; }
  .practice-evaluation { grid-template-columns: 1fr; padding: 18px; }
  .practice-score-card { min-height: 135px; position: static; }
  .practice-review-entry { align-items: stretch; flex-direction: column; }
  .review-login-notice { align-items: stretch; flex-direction: column; }
  .review-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-filters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-answer-grid { grid-template-columns: 1fr; }
  .review-dates { grid-template-columns: 1fr; }
  .review-list-toolbar { align-items: flex-start; flex-direction: column; }
  .review-list-tools { width: 100%; }
  .review-list-tools button { flex: 1 1 0; }
  .review-grade-group > summary { align-items: flex-start; }
  .review-record-summary { align-items: flex-start; }
  .review-record-detail { padding-left: 16px; }
  .unit-learning-bar { align-items: flex-start; flex-direction: column; }
  .unit-learning-actions { width: 100%; justify-content: flex-start; }
  .tutor-header-actions { width: 100%; justify-content: flex-start; }
  .poster-shell { padding: 0 14px; }
  .poster-head { padding: 28px 23px 24px; min-height: 170px; }
  .word-row { gap: 12px; align-items: flex-end; }
  .word-row h2 { letter-spacing: -4px; }
  .speak-button span:last-child { display: none; }
  .poster-index { display: none; }
  .poster-grid { grid-template-columns: 1fr; }
  .visual-panel { border-right: 0; min-height: 390px; }
  .meaning-panel, .examples-panel, .challenge-panel { padding: 31px 27px; }
  .ai-panel { padding: 34px 27px; }
  .ai-panel p { font-size: 18px; }
  .examples-panel { border-right: 0; border-bottom: 1px solid var(--line); }
  .poster-footer { min-height: 59px; padding: 0 17px; font-size: 12px; }
  .library-poster-toolbar { padding: 20px; align-items: flex-end; }
  .library-poster-toolbar h2 { letter-spacing: -2px; }
  .library-poster-toolbar .speak-button span:last-child { display: none; }
  .poster-version-bar { padding: 13px 20px; align-items: flex-start; flex-direction: column; }
  .poster-version-copy { align-items: flex-start; flex-direction: column; }
  .library-poster-footer { padding: 14px 20px; align-items: flex-start; flex-direction: column; gap: 5px; }
  .reading-diagnostic { padding: 18px 14px; }
  .reading-diagnostic-head, .reading-diagnostic-unit { align-items: flex-start; flex-direction: column; }
  .reading-diagnostic-unit button { width: 100%; }
  .learning-workspace { grid-template-columns: 1fr; }
  .tutor-panel { position: static; height: auto; max-height: none; border-radius: 14px; }
  .tutor-scroll { flex: 0 1 auto; max-height: none; }
  .poster-hotspot span { opacity: .84; padding: 5px 6px; font-size: 7px; }
  button:not(.poster-hotspot), select, input:not([type="radio"]):not([type="checkbox"]) { min-height: 44px; }
  .voice-picker select { min-height: 44px; }
}

@media (max-width: 520px) {
  .topbar { align-items: flex-start; flex-wrap: wrap; }
  .topbar-actions { width: 100%; justify-content: space-between; }
  .account-area { min-width: 0; }
  .account-button { max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .textbook-module-grid { grid-template-columns: 1fr; }
  .textbook-module-card { min-height: 0; }
  .library-search > div { grid-template-columns: 1fr; }
  .lexicon-preview-search > div { grid-template-columns: 1fr; }
  .textbook-selectors, .review-filters { grid-template-columns: 1fr; }
  .review-stat-grid,
  .review-admin-filters,
  .review-candidate-editor,
  .review-match-suggestion { grid-template-columns: 1fr; }
  .review-match-suggestion p { grid-column: auto; }
  .review-candidate-card > header { align-items: flex-start; flex-direction: column; }
  .review-page-toolbar { justify-content: stretch; flex-wrap: wrap; }
  .review-page-toolbar button { flex: 1 1 120px; }
  .lan-address-box, .lan-dialog-actions { grid-template-columns: 1fr; }
  .lan-qr-panel { min-height: 210px; }
}

@media (pointer: coarse) {
  button:not(.poster-hotspot), select, input:not([type="radio"]):not([type="checkbox"]) { min-height: 44px; }
  .poster-hotspot span { opacity: .84; transform: translateY(0); }
}

@media (min-width: 769px) and (max-width: 1180px) {
  .learning-workspace { grid-template-columns: 1fr; }
  .tutor-panel { position: static; height: auto; max-height: none; }
  .tutor-scroll { flex: 0 1 auto; max-height: none; }
  .review-filters { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .review-stat-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .review-admin-filters { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 1180px) {
  .tutor-scroll,
  .now-reading {
    overflow-y: visible;
    overscroll-behavior: auto;
    scrollbar-gutter: auto;
    touch-action: pan-y;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

.legal-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 18px;
  padding: 28px max(20px, 4vw) 36px;
  color: #53645d;
  font-size: .86rem;
}
.legal-footer a { color: #0d6b55; font-weight: 700; }
.legal-footer span { flex-basis: 100%; text-align: center; }

.legal-page { min-height: 100vh; background: #f6f0df; color: #123c35; }
.legal-document {
  width: min(860px, calc(100% - 32px));
  margin: 32px auto;
  padding: clamp(24px, 5vw, 58px);
  border: 1px solid rgba(18, 60, 53, .2);
  border-radius: 28px;
  background: rgba(255, 253, 246, .94);
  box-shadow: 0 18px 50px rgba(36, 53, 45, .1);
  line-height: 1.75;
}
.legal-document h1 { font-size: clamp(1.8rem, 5vw, 3rem); line-height: 1.2; }
.legal-document h2 { margin-top: 1.8em; font-size: 1.2rem; }
.legal-document a { color: #0d6b55; }
.legal-back { display: inline-flex; min-height: 44px; align-items: center; font-weight: 800; }
.legal-warning { padding: 16px 18px; border-left: 4px solid #e57856; background: #fff2e9; }