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var(--line);border-radius:8px;font-size:16px;background:var(--card);color:var(--fg)}.shared-word-list{flex:1;min-height:0;overflow-y:auto;overscroll-behavior-y:contain;-webkit-overflow-scrolling:touch;padding:0 14px 14px}.shared-word-empty{margin:18px 2px;color:var(--muted);font-size:14px;line-height:1.7}.shared-side-word{padding:16px 2px;border-top:1px solid var(--line);margin-top:10px}.shared-side-word>div{display:flex;justify-content:space-between;align-items:center;gap:8px}.shared-side-word h3{min-width:0;flex:1;margin:0;font-size:20px;overflow-wrap:anywhere}.shared-side-word small{display:block;overflow-wrap:anywhere;line-height:1.5;color:var(--muted);font-size:12px}.shared-side-word p{font-size:14px;line-height:1.7;margin:8px 0}.shared-side-word em{color:var(--reader-accent)}.shared-side-word button{flex-shrink:0;min-height:44px;min-width:44px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--reader-accent);cursor:pointer}.shared-side-word .shared-word-play{width:48px;height:48px;display:inline-flex;align-items:center;justify-content:center;padding:8px;border-color:var(--reader-accent);background:var(--bg2,var(--card))}.word-audio-icon{display:block;width:28px;height:28px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}.shared-side-word .shared-side-save{padding:8px;font-size:12px}.shared-side-save[aria-pressed=true]{color:var(--ok, #368168)}.shared-reader .tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;padding:0;background:none;border-radius:0}.shared-reader .tabs button{min-height:48px;padding:10px 8px;border:1.5px solid var(--line);border-radius:12px;background:var(--card);color:var(--fg);font-size:15px;font-weight:700;line-height:1.4;box-shadow:none;cursor:pointer}.shared-reader .tabs button.on{color:#fff;border-color:var(--reader-accent);background:var(--reader-accent);box-shadow:0 3px 8px rgba(0,0,0,.07)}.shared-reader :focus-visible{outline:2px solid var(--reader-accent);outline-offset:3px}.word-card-layer{position:fixed;top:0;right:0;bottom:0;left:0;z-index:240;display:grid;place-items:center;box-sizing:border-box;overflow:hidden;padding:18px}.word-card-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.word-card-shell{position:relative;width:min(560px,100%);max-height:calc(100vh - 40px);max-height:calc(100dvh - 40px);overflow:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.reader-directory-layer{position:fixed;top:0;right:0;bottom:0;left:0;z-index:220;display:grid;place-items:center;padding:24px}.reader-directory-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0;background:rgba(31,23,20,.58);-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);cursor:pointer}.reader-directory-dialog{position:relative;width:min(760px,100%);max-height:min(82vh,760px);display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line);border-radius:20px;background:var(--card);color:var(--fg);box-shadow:0 24px 80px rgba(35,24,20,.26)}.reader-directory-dialog>header{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 22px 16px;border-bottom:1px solid var(--line)}.reader-directory-dialog>header small{display:block;margin-bottom:4px;color:var(--reader-accent);font-size:10px;font-weight:800;letter-spacing:.16em}.reader-directory-dialog h2{margin:0;font-family:inherit;font-size:21px;line-height:1.35}.reader-directory-close{flex:none;width:44px;height:44px;border:1px solid var(--line);border-radius:50%;background:var(--card);color:var(--fg);font-size:26px;line-height:1;cursor:pointer}.reader-directory-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;padding:18px 20px 22px;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.reader-directory-item{min-width:0;min-height:76px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 12px;align-content:center;padding:13px 15px;border:1px solid var(--line);border-radius:12px;color:var(--fg);background:var(--card);text-align:left;cursor:pointer}.reader-directory-item>span{grid-column:1/-1;color:var(--reader-accent);font-size:11px;font-weight:800}.reader-directory-item>b{min-width:0;overflow:hidden;color:var(--fg);font-size:14px;line-height:1.45;text-overflow:ellipsis;white-space:nowrap}.reader-directory-item>small{align-self:center;color:var(--muted);font-size:11px;white-space:nowrap}.reader-directory-item.is-current{border-color:var(--reader-accent);background:var(--bg2,#f8f3ed);box-shadow:inset 3px 0 0 var(--reader-accent)}@media (min-width:768px){.shared-reader-layout.with-words{height:clamp(500px,calc(100vh - 176px),760px);grid-template-columns:clamp(230px,24vw,280px) minmax(0,1fr);align-items:stretch}.shared-reader-layout.with-words>.shared-word-sidebar,.shared-reader-layout.with-words>.shared-reader-body{height:100%;min-height:0}.shared-reader-layout.with-words>.shared-word-sidebar{overflow:hidden}.shared-reader-layout.with-words>.shared-reader-body{overflow-y:auto;overscroll-behavior-y:contain;-webkit-overflow-scrolling:touch}.shared-reader-layout.with-words>.shared-reader-body{padding-right:6px}.shared-reader-layout:not(.with-words){height:auto;align-items:start}.shared-reader-layout:not(.with-words)>.shared-reader-body{height:auto;overflow:visible;padding-right:0}}@media (max-width:767px){.shared-reader-layout.with-words{grid-template-columns:minmax(0,1fr)}.shared-word-sidebar{height:min(52vh,480px);max-height:min(52vh,480px);overflow:hidden}}@media (max-width:600px){.app.reader-app{padding-left:12px;padding-right:12px}.shared-reader .tabs{gap:8px}.shared-reader .tabs button{font-size:14px;padding:10px 4px}.word-card-layer{align-items:end;padding:0}.word-card-shell{width:100%;max-height:88vh;max-height:88dvh}.reader-directory-layer{align-items:end;padding:0}.reader-directory-dialog{width:100%;max-height:86vh;max-height:86dvh;border-radius:22px 22px 0 0}.reader-directory-dialog>header{padding:18px 18px 14px}.reader-directory-dialog h2{font-size:18px}.reader-directory-list{grid-template-columns:minmax(0,1fr);padding:14px 14px calc(18px + env(safe-area-inset-bottom))}.reader-directory-item{min-height:70px}}@media (min-width:768px){.legacy-ui .shared-reader-layout.with-words{display:flex;align-items:stretch;height:calc(100vh - 150px);min-height:380px;max-height:760px}.legacy-ui .shared-reader-layout.with-words>.shared-word-sidebar{flex:0 0 250px;width:250px;margin-right:18px}.legacy-ui .shared-reader-layout.with-words>.shared-reader-body{flex:1 1 0%;width:0;min-width:0}}.shared-reader .story-text{line-height:1.75}.story-paragraph-break{display:block;height:.65em;line-height:0;font-size:inherit;white-space:normal;overflow:hidden}.shared-reader .story-section-heading{margin:18px 0 8px}.course-back-title-short{display:none}@media (max-width:600px){.shared-reader .shared-reader-toolbar.reader-toolbar{padding:8px;gap:8px}.reader-app .course-back-button{flex:0 1 auto;font-size:14px;padding-right:0;gap:4px}.reader-app .course-back-title-full{display:none}.reader-app .course-back-title-short{display:inline}.reader-app .topbar.course-topbar,.reader-app .course-topbar .topbar-tools{flex-wrap:nowrap;gap:6px}.reader-app .course-topbar .topbar-tools>button{font-size:12px;padding:8px;white-space:nowrap;min-height:44px}.reader-app .course-back-arrow{width:24px}}.shared-reader .shared-reader-toolbar.reader-toolbar button{box-sizing:border-box;display:inline-flex;align-items:center;justify-content:center;height:44px;min-height:44px;border-width:1px;border-style:solid;border-radius:10px;line-height:1.2;vertical-align:middle}.reader-app .course-topbar .topbar-tools>button,.shared-reader .tabs button,.shared-reader .shared-side-word button{border-radius:10px}.shared-reader .story-hero .story-title{font-size:28px;line-height:1.4;overflow-wrap:break-word;margin:6px 0}@media (max-width:600px){.shared-reader .story-hero .story-title{font-size:22px}}.auth-preview-shell{width:min(1280px,calc(100% - 64px));grid-template-columns:minmax(0,1.08fr) minmax(440px,1fr)}.auth-preview-account{padding:44px 44px 32px}.auth-preview-account-head p{font-size:16px;line-height:1.6}.auth-preview-account-head h2{font-size:40px;line-height:1.25}.auth-preview-account-head>span{font-size:17px;line-height:1.7}.auth-account-hint{margin:14px 0 0;font-size:15px;line-height:1.7}.auth-preview-tabs{margin:26px 0 24px}.auth-preview-tabs button{height:50px;font-size:18px}.auth-preview-form{gap:18px}.auth-field{gap:9px}.auth-field-head{align-items:baseline;gap:12px}.auth-field-head b{font-size:17px;line-height:1.6;flex:none}.auth-field-head small{font-size:14px;line-height:1.6;text-align:right}.auth-field input{height:56px;font-size:18px;padding:0 16px}.auth-preview-forgot{min-height:44px;font-size:16px;padding:8px 0}.auth-preview-submit{height:60px;font-size:22px;letter-spacing:.02em}.auth-preview-submit b{width:42px;height:42px;font-size:24px}.auth-preview-notice{font-size:14px;line-height:1.7}.auth-preview-sync{margin-top:24px;padding-top:22px}.auth-preview-sync>span,.auth-preview-sync b{font-size:14px;line-height:1.7}.auth-preview-brand b{font-size:24px}.auth-preview-brand small{font-size:14px;letter-spacing:.08em}.auth-preview-story-copy>p:not(.auth-preview-kicker){font-size:17px;line-height:1.8}.auth-preview-loop{font-size:15px}[data-course-theme=ielts] .auth-preview-page{--auth-paper: #fffaf2;--auth-paper-deep: #f2e2ca;--auth-ink: #49301d;--auth-muted: #806449;--auth-wine: #9b672f;--auth-wine-dark: #744820;background:radial-gradient(ellipse at 20% 10%,#dbc49b,transparent 58%),#71503b}[data-course-theme=ielts] .auth-preview-shell{display:grid;min-height:780px;margin:32px auto;border:1px solid #e4cba6;border-radius:34px;background:#fffaf2;box-shadow:0 28px 70px rgba(53,29,13,.22)}[data-course-theme=ielts] .auth-preview-story{position:relative;min-height:780px;padding:0;color:#49301d;background:#efe0c6;border:0}[data-course-theme=ielts] .auth-preview-story>img{display:block;position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover;object-position:50% 36%}[data-course-theme=ielts] .auth-preview-story-shade{display:block;background:linear-gradient(180deg,rgba(42,25,12,.22),transparent 25%,transparent 52%,rgba(255,245,225,.74) 78%,#f2e2c7)}[data-course-theme=ielts] .auth-preview-story:after{display:block;border-color:rgba(255,249,229,.6)}[data-course-theme=ielts] .auth-preview-brand{display:block;position:absolute;top:32px;left:32px;padding:12px 16px;border:1px solid rgba(255,245,225,.9);border-radius:14px;color:#533519;background:rgba(255,246,227,.85)}[data-course-theme=ielts] .auth-preview-brand b{font-family:Songti SC,STSong,serif}[data-course-theme=ielts] .auth-preview-brand small{color:#806449}[data-course-theme=ielts] .auth-preview-story-copy{display:block;left:38px;right:38px;bottom:52px}[data-course-theme=ielts] .auth-preview-kicker{font-size:18px;color:#8c602b}[data-course-theme=ielts] .auth-preview-story-copy h1{font-size:48px;line-height:1.35;color:#533519;background:none;-webkit-text-fill-color:#533519;text-shadow:none}[data-course-theme=ielts] .auth-preview-story-copy>p:not(.auth-preview-kicker){color:#624326}[data-course-theme=ielts] .auth-preview-loop{border-color:#bb955e;background:rgba(255,249,235,.72);color:#684825}[data-course-theme=ielts] .auth-preview-loop i{color:#9b672f}[data-course-theme=ielts] .auth-preview-account{min-height:0;background:repeating-linear-gradient(0deg,rgba(172,129,69,.035) 0,rgba(172,129,69,.035) 1px,transparent 1px,transparent 30px),#fffaf2}[data-course-theme=ielts] .auth-preview-account-head h2{font-family:Songti SC,STSong,serif}[data-course-theme=ielts] .auth-preview-tabs{border-color:#e4d0b3;background:#f2e5d1}[data-course-theme=ielts] .auth-preview-tabs button{color:#806449}[data-course-theme=ielts] .auth-preview-tabs button.is-active{color:#9b672f;background:#fffdf8;box-shadow:0 3px 12px rgba(125,85,36,.08)}[data-course-theme=ielts] .auth-field input{background:#fffdf8;border-color:#ddc8ac;color:#49301d}[data-course-theme=ielts] .auth-field input:focus-visible{background:#fff;border-color:#b8863b}[data-course-theme=ielts] .auth-field input::placeholder{color:#917a61}[data-course-theme=ielts] .auth-preview-submit{border:1px solid #986027;background:linear-gradient(135deg,#a97635,#815124);font-family:Songti SC,STSong,serif;box-shadow:0 8px 20px rgba(131,83,31,.16)}[data-course-theme=ielts] .auth-preview-submit b{background:#e9c68a;color:#5f3a17}[data-course-theme=ielts] .auth-preview-sync{border-color:#e4d0b3}[data-course-theme=ielts] .auth-preview-sync b,[data-course-theme=ielts] .auth-preview-sync>span{color:#806449}@media (max-width: 900px){.auth-preview-page{position:absolute;bottom:auto;min-height:calc(100dvh - 49px);overflow:visible}.auth-preview-shell,[data-course-theme=ielts] .auth-preview-shell{width:100%;display:block;min-height:0;margin:0;border:0;border-radius:0;box-shadow:none}.auth-preview-story,[data-course-theme=ielts] .auth-preview-story{height:210px;min-height:0;aspect-ratio:auto}.auth-preview-account,[data-course-theme=ielts] .auth-preview-account{min-height:0;padding:28px 24px 30px}.auth-preview-story-copy,.auth-preview-brand,.auth-preview-story-shade,.auth-preview-edition,[data-course-theme=ielts] .auth-preview-story-copy,[data-course-theme=ielts] .auth-preview-brand,[data-course-theme=ielts] .auth-preview-story-shade,[data-course-theme=ielts] .auth-preview-story:after{display:none}[data-course-theme=ielts] .auth-preview-story>img{object-position:50% 22%}.auth-preview-account-head p{font-size:15px}.auth-preview-account-head h2{font-size:32px}.auth-preview-account-head>span{font-size:16px}.auth-account-hint{font-size:14px}.auth-preview-tabs{margin:20px 0}.auth-preview-tabs button{height:48px;font-size:17px}.auth-preview-form{gap:16px}.auth-field-head b{font-size:16px}.auth-field-head small{font-size:13px}.auth-field input{height:54px;font-size:16px}.auth-preview-submit{height:58px;font-size:21px}.auth-preview-notice,.auth-preview-sync>span,.auth-preview-sync b{font-size:13px}}@media (max-width: 430px){.auth-preview-account,[data-course-theme=ielts] .auth-preview-account{padding:26px 20px 28px}.auth-preview-story,[data-course-theme=ielts] .auth-preview-story{height:200px}.auth-field-head{gap:8px}}

/* TuTu Android home guide 20261020 */
.home-guide-launcher{box-sizing:border-box;display:inline-flex;align-items:center;justify-content:center;gap:6px;height:44px;min-height:44px;padding:8px 12px;border:2px solid currentColor;border-radius:10px;background:#fff;color:inherit;font:800 16px/1.4 system-ui;white-space:nowrap;cursor:pointer;box-shadow:0 2px 5px #3424470a}
.home-guide-shade{position:fixed;inset:0;z-index:20010;display:flex;align-items:center;justify-content:center;padding:20px;background:rgba(35,23,44,.5);box-sizing:border-box}
.home-guide-dialog{position:relative;box-sizing:border-box;width:100%;max-width:480px;max-height:85vh;overflow:auto;padding:30px 24px 24px;border-radius:20px;background:#fffafc;color:#352448;font:16px/1.7 system-ui;box-shadow:0 14px 60px #23172c33}
.home-guide-dialog:focus{outline:none}
.home-guide-dialog h2{margin:4px 30px 10px 0;font-size:23px;line-height:1.4}
.home-guide-brand{display:flex;align-items:center;gap:12px;padding-right:12px;min-width:0}
.home-guide-brand img{flex:none;border-radius:23%}
.home-guide-brand h2{margin:0 16px 0 0}
.home-guide-dialog p{margin:10px 0;color:#655874}
.home-guide-close{position:absolute;top:8px;right:8px;display:grid;place-items:center;width:44px;height:44px;padding:0;border:0;border-radius:50%;background:transparent;color:#7351a8;font:32px/1 system-ui;cursor:pointer}
.home-guide-devices{display:flex;gap:6px;margin:20px 0;padding:5px;border-radius:12px;background:#f0e8f8}
.home-guide-devices button{flex:1;min-height:44px;padding:6px;border:0;border-radius:9px;background:transparent;color:#655874;font:600 15px/1.4 system-ui;cursor:pointer}
.home-guide-devices button[aria-pressed="true"]{background:#fff;color:#63428f;box-shadow:0 2px 8px #35244812}
.home-guide-dialog ol{padding-left:24px;margin:20px 0}
.home-guide-dialog li{padding-left:4px;margin:12px 0}
.home-guide-dialog .home-guide-note{padding:12px 14px;border-radius:10px;background:#f5effa;font-size:14px}
.home-guide-transfer{padding:14px;border:1px solid #e4d8ee;border-radius:12px;background:#f5effa}
.home-guide-transfer strong{display:block;font-size:15px}
.home-guide-dialog .home-guide-transfer p{margin:6px 0 12px;font-size:14px}
.home-guide-copy{min-height:44px;padding:8px 16px;border:1px solid #7351a8;border-radius:9px;background:#fff;color:#63428f;font:700 15px/1.5 system-ui;cursor:pointer}
.home-guide-address{display:block;box-sizing:border-box;width:100%;min-width:0;margin-top:10px;padding:10px;border:1px solid #d8c9e6;border-radius:8px;background:#fff;color:#655874;font:14px/1.5 system-ui}
.home-guide-copy-status{display:block;font-size:14px;color:#63428f;overflow-wrap:anywhere}
.home-guide-copy-status:not(:empty){margin-top:8px}
.home-guide-browser-title{margin:20px 0 10px;font-size:17px}
.home-guide-browsers{display:flex;flex-wrap:wrap;gap:8px}
.home-guide-browsers button{flex:1 1 110px;min-height:44px;padding:8px 10px;border:1px solid #d8c9e6;border-radius:9px;background:#fff;color:#655874;font:600 14px/1.5 system-ui;cursor:pointer}
.home-guide-browsers button[aria-pressed="true"]{border-color:#7351a8;background:#f0e8f8;color:#63428f}
.home-guide-help{margin:16px 0;border-top:1px solid #e4d8ee;border-bottom:1px solid #e4d8ee}
.home-guide-help summary{padding:12px 0;color:#63428f;font-size:15px;font-weight:700;cursor:pointer}
.home-guide-help ul{margin:0 0 14px;padding-left:20px;font-size:14px}
.home-guide-dialog .home-guide-help li{margin:8px 0}
.home-guide-done{width:100%;min-height:48px;margin-top:10px;padding:10px;border:0;border-radius:11px;background:#7351a8;color:white;font:700 17px/1.5 system-ui;cursor:pointer}
.home-guide-dialog button:focus-visible,.home-guide-dialog input:focus-visible,.home-guide-dialog summary:focus-visible,.home-guide-launcher:focus-visible{outline:2px solid #7351a8;outline-offset:2px}
.home-guide-dialog .home-guide-close:focus,.home-guide-dialog .home-guide-close:focus-visible{outline:none;box-shadow:none}
.home-guide-dialog .home-guide-close:focus-visible{color:#4e256f;text-decoration:underline;text-underline-offset:5px}
@media(max-width:600px){.home-guide-dialog{padding:28px 20px 20px}.home-guide-dialog h2{font-size:21px}.home-guide-launcher{font-size:15px;padding:8px 10px}}

.home-guide-dialog.home-guide-illustrated{max-width:880px}
.home-guide-pictures h3{margin:18px 0 10px;font-size:17px}
.home-guide-steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.home-guide-steps img{display:block;width:100%;height:auto;border-radius:10px}
@media(max-width:600px){.home-guide-shade{padding:12px}.home-guide-dialog{max-height:calc(100vh - 24px);max-height:calc(100dvh - 24px);padding:28px 16px 16px}.home-guide-steps{grid-template-columns:minmax(0,1fr)}.home-guide-brand img{width:44px;height:44px}.home-guide-brand h2{font-size:19px}}

/* Approved shelf preview 20261020 */
/* Lining figures share a baseline; Georgia's old-style digits do not. */
html body .home .syllabus-entry-icon,
html body .home .stat-num,
html body .home .book-no,
html body .ielts-collection-count,
html body .course-small-stats b,
html body .learning-stats b,
html body .chapter-summary-stats b,
html body .notebook-hero strong {
  font-family:Arial,"Helvetica Neue",sans-serif!important;
  font-variant-numeric:lining-nums tabular-nums;
  font-feature-settings:"lnum" 1,"tnum" 1;
}
html body .home .syllabus-entry-icon { line-height:1; letter-spacing:0; }

.home .story-category-picker { position:relative; }
.home .story-category-trigger { display:inline-flex; align-items:center; gap:8px; min-height:44px; padding:0 4px 0 0; border:0; color:inherit; background:none; font:inherit; cursor:pointer; }
.home .story-category-trigger svg { flex:none; }
.home .story-category-trigger[aria-expanded="true"] svg { transform:rotate(180deg); }
.home .story-category-trigger:focus-visible { outline:2px solid var(--shelf-filter-accent); outline-offset:2px; border-radius:6px; }
.home .story-category-filters { position:absolute; top:calc(100% - 4px); left:0; z-index:30; display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:8px; box-sizing:border-box; width:100%; max-width:480px; padding:12px; border:1px solid var(--line); border-radius:14px; background:var(--card); box-shadow:var(--shadow-lg,0 8px 24px #0002); }
.home .story-category-filters button { min-width:0; display:inline-flex; align-items:center; justify-content:center; gap:6px; min-height:44px; padding:7px 6px; border:1px solid var(--line); border-radius:10px; background:var(--card); color:var(--fg); font:600 14px/1.4 system-ui,sans-serif; cursor:pointer; white-space:nowrap; }
.home .story-category-filters button[aria-pressed="true"] { color:var(--card); background:var(--shelf-filter-accent); border-color:var(--shelf-filter-accent); }
.home .story-category-filters button:focus-visible { outline:2px solid var(--shelf-filter-accent); outline-offset:2px; }
.home .story-filter-count { font-family:Arial,"Helvetica Neue",sans-serif; font-variant-numeric:lining-nums tabular-nums; font-feature-settings:"lnum" 1,"tnum" 1; opacity:.72; font-size:12px; }
.home .story-filter-result { margin-left:auto; color:var(--muted); font:400 13px/1.4 system-ui,sans-serif; }

.home-guide-edge-image{display:block;width:100%;height:auto;border-radius:10px}