/* Học & Thi: one focused surface for students. */
body.page-id-4017 .block>.block-title.text-center{display:none}
body.page-id-4017 .page.container{max-width:1440px;width:100%;padding:0 24px}
body.page-id-4017 .editor{color:#16344d}
.gssv-study.gsv-teen{max-width:1380px;margin:24px auto 48px;font-size:16px;--question-size:20px}
.gsv-teen .gsv-welcome{display:grid;grid-template-columns:minmax(0,1fr) 200px;gap:28px;align-items:center;background:linear-gradient(110deg,#e8f5ff,#effbf7);border:1px solid #d5e8ef;border-radius:24px;padding:28px 36px;margin-bottom:20px}
.gsv-teen .gsv-welcome h1{font-size:clamp(27px,3vw,38px);line-height:1.3;margin:6px 0 12px;color:#16344d;font-weight:750}
.gsv-teen .gsv-welcome p{margin:0 0 8px}.gsv-teen .gsv-welcome img{width:200px;height:200px;object-fit:contain}
.gsv-teen .gsv-perks{font-size:14px;color:#336958}.gsv-teen .gsv-greeting{color:#1463ad;font-weight:600;font-size:16px;overflow-wrap:anywhere}
.gsv-teen .gsv-identity{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 18px}.gsv-teen .gsv-identity button{font-size:13px;padding:7px 12px;background:transparent;color:#50697a;border-color:#dce7ee}
.gsv-teen .gsv-paths{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:0 0 24px}.gsv-teen .gsv-paths button{display:flex;flex-direction:column;align-items:flex-start;padding:19px 24px;background:white;color:#16344d;border-color:#dce7ee;text-align:left;border-radius:16px}
.gsv-teen .gsv-paths button[aria-pressed=true]{background:#eaf4ff;border:2px solid #1463ad;padding:18px 23px}.gsv-teen .gsv-paths span{font-size:21px;font-weight:700}.gsv-teen .gsv-paths small{font-size:14px;font-weight:400;color:#50697a;margin-top:4px}
.gsv-teen .gsv-selection-heading{font-size:22px;line-height:1.35;margin:0 0 16px}.gsv-teen .gsv-filters{grid-template-columns:repeat(3,minmax(0,1fr));padding:20px;background:#f3f7fb;border-radius:16px;gap:16px;margin-bottom:12px}
.gsv-teen .gsv-filters label{display:grid;gap:8px;font-size:14px}.gsv-teen .gsv-filters select{font-size:16px;background:#fff;min-height:48px}
.gsv-teen .gsv-count{margin:16px 0}.gsv-teen .gsv-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.gsv-teen .gsv-grid[aria-busy=true]{opacity:.6;pointer-events:none}
.gsv-teen .gsv-card{padding:22px;box-shadow:none;border-radius:18px}.gsv-teen .gsv-card h3{font-size:19px;line-height:1.5;margin:14px 0 12px;font-weight:700}.gsv-teen .gsv-card .gsv-meta{font-size:14px;margin-bottom:18px}.gsv-teen .gsv-card .gsv-actions{gap:8px}.gsv-teen .gsv-card button{font-size:15px;min-height:44px;padding:10px 14px}.gsv-teen .gsv-source{font-size:12px;margin-top:16px;color:#647c8b}.gsv-teen .gsv-source summary{cursor:pointer}.gsv-teen .gsv-source p{margin-top:8px}.gsv-teen .gsv-pagination{display:flex;align-items:center;justify-content:center;gap:18px;margin:24px 0}.gsv-teen .gsv-resume{width:100%;padding:16px;text-align:left;white-space:normal;overflow-wrap:anywhere;background:#1463ad;margin:0 0 18px}
.gsv-teen .gsv-name-dialog{width:min(440px,calc(100% - 32px));border:1px solid #dce7ee;border-radius:22px;padding:28px;box-shadow:0 20px 80px #16344d40;color:#16344d;font:inherit}.gsv-teen .gsv-name-dialog::backdrop{background:#16344d66}.gsv-teen .gsv-name-dialog h2{font-size:24px}.gsv-teen .gsv-name-dialog label{display:block;font-weight:600;margin:16px 0 8px}.gsv-teen .gsv-name-dialog .gsv-meta{margin:10px 0 18px}
.gsv-teen .gsv-font-control{display:flex;align-items:center;gap:10px;font-size:14px;margin:0 0 16px}.gsv-teen .gsv-font-control select{width:100px;font-size:14px;padding:8px}
.gsv-teen .gsv-exam-layout{grid-template-columns:minmax(0,1fr) 200px;gap:20px}.gsv-teen .gsv-question{padding:32px;min-height:400px;font-size:var(--question-size);line-height:1.8}.gsv-teen .gsv-question>.gsv-rich,.gsv-teen .gsv-option,.gsv-teen .gsv-tf-row{font-size:var(--question-size)}.gsv-teen .gsv-question>.gsv-rich{margin:18px 0 24px}.gsv-teen .gsv-option{padding:15px 18px;min-height:58px}.gsv-teen .gsv-exam-layout aside{padding:16px}.gsv-teen .gsv-nav{grid-template-columns:repeat(4,minmax(0,1fr))}.gsv-teen .gsv-work{scroll-margin-top:24px}.gsv-teen .gsv-toolbar{flex-wrap:wrap}.gsv-teen .gsv-toolbar h3{font-size:21px;flex:1 1 400px;line-height:1.5}.gsv-teen.is-working .gsv-welcome,.gsv-teen.is-working>.gsv-history,.gsv-teen.is-working>.gsv-footer{display:none}
.gsv-teen.gsv-focus .gsv-exam-layout{grid-template-columns:minmax(0,1fr)}.gsv-teen.gsv-focus .gsv-exam-layout aside{position:static;display:grid;grid-template-columns:minmax(0,1fr) 200px;gap:14px}.gsv-teen.gsv-focus .gsv-nav{grid-template-columns:repeat(12,minmax(0,1fr));grid-column:1}.gsv-teen.gsv-focus .gsv-exam-layout aside>p{grid-column:1/-1}.gsv-teen.gsv-focus .gsv-submit{align-self:start}
.gsv-exam-page{width:min(1440px,calc(100% - 48px))}.gsv-exam-page .gsv-page-heading h1{font-size:clamp(25px,3vw,34px)}.gsv-exam-page .gsv-teen .gsv-grid{grid-template-columns:1fr}.gsv-exam-page .gsv-teen .gsv-card{display:flex}.gsv-exam-page .gsv-teen .gsv-card .gsv-actions{display:flex;align-self:stretch}
.gsv-home-widget{display:flex;gap:28px;align-items:center;padding:28px;background:linear-gradient(100deg,#e8f5ff,#effbf7);border:1px solid #d5e8ef;border-radius:22px;max-width:1380px;margin:24px auto;font-family:inherit;color:#16344d}.gsv-home-widget img{width:160px;height:160px;object-fit:contain}.gsv-home-widget h2{font-size:28px;margin:6px 0 12px}.gsv-home-widget p{margin:0 0 10px}.gsv-home-widget form{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.gsv-home-widget select,.gsv-home-widget button{font:inherit;border:1px solid #c7dce8;padding:10px;border-radius:10px;min-height:44px}.gsv-home-widget button{background:#1463ad;color:white;cursor:pointer}.gsv-home-widget a{color:#1463ad;font-weight:600}.gsv-home-widget :focus-visible{outline:3px solid #efb63b;outline-offset:3px}
@media(max-width:1000px){.gsv-teen .gsv-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.gsv-teen .gsv-welcome{padding:24px}.gsv-teen .gsv-question{padding:24px}}
@media(max-width:800px){body.page-id-4017 .page.container{padding:0 16px}.gsv-teen .gsv-welcome{grid-template-columns:minmax(0,1fr) 110px;gap:12px}.gsv-teen .gsv-welcome img{width:110px;height:140px}.gsv-teen .gsv-exam-layout{grid-template-columns:1fr}.gsv-teen .gsv-nav{grid-template-columns:repeat(8,minmax(0,1fr))}.gsv-teen .gsv-exam-layout aside{position:static}.gsv-teen.gsv-focus .gsv-exam-layout aside{display:block}.gsv-teen.gsv-focus .gsv-nav{grid-template-columns:repeat(8,minmax(0,1fr))}.gsv-exam-page{width:calc(100% - 32px)}.gsv-home-widget{gap:16px;padding:20px}.gsv-home-widget img{width:100px;height:120px}}
@media(max-width:540px){.gsv-teen .gsv-grid{grid-template-columns:1fr}.gsv-teen .gsv-welcome{padding:22px 18px;grid-template-columns:minmax(0,1fr) 80px}.gsv-teen .gsv-welcome img{width:80px;height:110px}.gsv-teen .gsv-welcome h1{font-size:26px}.gsv-teen .gsv-welcome p{font-size:14px}.gsv-teen .gsv-paths{gap:10px}.gsv-teen .gsv-paths button{padding:14px 12px}.gsv-teen .gsv-paths button[aria-pressed=true]{padding:13px 11px}.gsv-teen .gsv-paths span{font-size:17px}.gsv-teen .gsv-paths small{font-size:12px}.gsv-teen .gsv-filters{grid-template-columns:1fr;padding:16px;gap:12px}.gsv-teen .gsv-question{padding:18px}.gsv-teen .gsv-toolbar h3{font-size:18px}.gsv-teen .gsv-nav,.gsv-teen.gsv-focus .gsv-nav{grid-template-columns:repeat(6,minmax(0,1fr))}.gsv-home-widget{align-items:flex-start}.gsv-home-widget img{width:70px;height:90px}.gsv-home-widget h2{font-size:22px}.gsv-home-widget form{flex-direction:column;align-items:stretch}}
@media(prefers-reduced-motion:reduce){.gsv-teen *{scroll-behavior:auto!important}}

.gsv-teen .gsv-question button{font-size:15px;min-height:44px}.gsv-teen .gsv-font-control~.gsv-toolbar .gsv-timer{font-size:16px}.gsv-teen .gsv-live-feedback .gsv-actions{margin-top:12px}.gsv-teen .gsv-welcome .gsv-greeting{background:#ffffffa6;border-radius:10px;padding:10px 12px;display:inline-block;margin-top:6px}
/* 1.4 merged reading and teen experience; image size independent of text size. */
.gsv-teen .gsv-exam-layout,.gsv-teen.gsv-focus .gsv-exam-layout{grid-template-columns:minmax(0,1fr)}
.gsv-teen .gsv-question{padding:20px;min-height:0}.gsv-teen .gsv-nav,.gsv-teen.gsv-focus .gsv-nav{grid-template-columns:repeat(auto-fill,minmax(42px,1fr))}.gsv-teen.gsv-focus .gsv-exam-layout aside{display:none}
.gsv-teen .gsv-compact .gsv-option{min-height:46px;font-size:17px}.gsv-teen .gsv-question button{font-size:14px}.gsv-teen .gsv-stem img{min-width:var(--gsv-min-image,750px)}
.gsv-mascot.is-sad{animation:gsv-arrive .6s ease-out 1}.gsv-teen .gsv-tf-compact{font-size:16px}.gsv-teen .gsv-question>.gsv-actions{margin-top:12px}
.gsv-teen .gsv-question-tools{display:flex;flex-wrap:wrap;gap:10px}.gsv-teen .gsv-work .gsv-font-control{margin-bottom:8px}
@media(max-width:540px){.gsv-teen .gsv-question{padding:10px}.gsv-teen .gsv-welcome{padding:14px}.gsv-teen .gsv-welcome h1{font-size:23px}.gsv-teen .gsv-mix{padding:12px}}
.gsv-teen .gsv-stem img{max-width:none!important;width:var(--gsv-zoom,150%)!important;height:auto!important}
.gsv-teen.gsv-focus .gsv-exam-layout aside{display:block}.gsv-teen.gsv-focus .gsv-exam-layout aside>p,.gsv-teen.gsv-focus .gsv-nav{display:none}.gsv-no-effects .gsv-mascot{display:none}
/* 1.5: friendly, focused discovery with progressive exam setup. */
.gssv-study.gsv-teen{--gsv-blue:#16685e;--gsv-ink:#183a39;--gsv-green:#28726a;--gsv-line:#dbe8e5;font-family:inherit;max-width:1320px;color:var(--gsv-ink)}
.gsv-teen .gsv-welcome{position:relative;overflow:hidden;grid-template-columns:minmax(0,1.3fr) minmax(210px,.7fr);background:radial-gradient(ellipse at 92% 15%,#fff0ca 0,transparent 48%),linear-gradient(130deg,#e8f8f1,#f7fbff);padding:32px 38px;gap:26px;border:1px solid #c9e5d9;border-radius:28px;min-height:310px}
.gsv-teen .gsv-welcome h1{font-size:clamp(28px,3.7vw,46px);line-height:1.18;letter-spacing:-.035em;margin:12px 0 16px;color:#193b36;max-width:730px}.gsv-teen .gsv-welcome h1 span{color:#287b64}.gsv-teen .gsv-welcome p{max-width:650px}.gsv-hero-links{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0 16px}.gsv-teen .gsv-hero-links button{border-radius:14px;padding:12px 18px;box-shadow:0 3px 0 #14524b;font-size:15px}.gsv-teen .gsv-hero-links .gsv-secondary{box-shadow:none;border-color:#b2cec4}.gsv-teen .gsv-perks{font-size:12px;color:#597367}.gsv-teen .gsv-welcome .gsv-greeting:empty{display:none}
.gsv-teen button.gsv-buddy-scene{position:relative;background:transparent;border:0;box-shadow:none;height:270px;padding:0;isolation:isolate;cursor:pointer}.gsv-teen .gsv-buddy-scene img{height:250px;width:230px;object-fit:contain;animation:gsv-breathe 3.5s ease-in-out infinite;transform-origin:50% 92%;filter:drop-shadow(0 12px 12px #1d594a18)}.gsv-teen .gsv-buddy-scene::before{content:'';position:absolute;width:220px;height:220px;border-radius:50%;background:#d7eee1;inset:30px auto auto 50%;transform:translateX(-50%);z-index:-1}.gsv-buddy-bubble{position:absolute;right:0;top:4px;background:white;color:#336354;border:1px solid #d7e8df;border-radius:16px 16px 16px 3px;box-shadow:0 8px 25px #36684712;padding:10px 12px;font-size:13px;font-weight:600;max-width:185px;line-height:1.4;animation:gsv-bubble 5s ease-in-out infinite}.gsv-buddy-heart{position:absolute;left:15%;top:20%;color:#d68183;font-size:32px;animation:gsv-bubble 4s ease-in-out infinite}.gsv-buddy-orbit{position:absolute;right:12%;bottom:10%;font-size:30px;color:#e7ac3c;animation:gsv-twinkle 3s ease-in-out infinite}.gsv-teen .gsv-buddy-scene.is-waving img{animation:gsv-wave .7s ease-in-out 2,gsv-breathe 3.5s 1.4s ease-in-out infinite}
.gsv-name-inline{display:flex;gap:16px;background:#fff9ef;border:1px solid #eddfc8;border-radius:20px;padding:20px 24px;margin:0 0 20px}.gsv-name-inline>div{flex:1;min-width:0}.gsv-name-heart{display:grid;place-items:center;width:44px;height:44px;flex-shrink:0;color:#bd6477;background:#fbe5e7;border-radius:14px;font-size:30px}.gsv-name-inline label{font-weight:750;font-size:18px;color:#684746}.gsv-teen .gsv-name-inline p{font-size:13px;margin:5px 0 12px;color:#816f5b}.gsv-inline-fields{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.gsv-teen .gsv-inline-fields input{flex:1 1 200px;width:auto;max-width:370px;min-width:0;background:white;border-color:#e1cdb2}.gsv-inline-fields button{font-size:14px!important;min-height:44px}.gsv-teen .gsv-inline-status:empty{display:none}.gsv-teen .gsv-identity{margin-bottom:12px;justify-content:flex-end;gap:8px}.gsv-teen .gsv-identity button{font-size:12px;border:0;padding:5px 8px}
.gsv-teen .gsv-paths{gap:12px;margin-bottom:18px}.gsv-teen .gsv-paths button{border-radius:18px;box-shadow:0 3px 0 #e0eae5}.gsv-teen .gsv-paths button[aria-pressed=true]{border-color:#288574;background:#ecf8f1}.gsv-teen .gsv-paths span{font-size:19px}.gsv-teen .gsv-paths small{font-size:12px}
.gsv-teen .gsv-mix{background:#fff;border:1px solid #cddfd9;border-radius:20px;margin-bottom:26px;padding:0;scroll-margin-top:24px;overflow:hidden}.gsv-teen .gsv-mix>summary{display:flex;align-items:center;gap:14px;list-style:none;padding:18px 22px;font-size:18px;color:#254c45}.gsv-mix>summary::-webkit-details-marker{display:none}.gsv-mix>summary small{display:block;font-size:12px;font-weight:400;color:#607c72;margin-top:4px}.gsv-mix-icon{background:#e6f4ec;color:#377763;border-radius:12px;width:42px;height:42px;display:grid;place-items:center;flex-shrink:0;font-size:23px}.gsv-mix-plus{margin-left:auto;font-size:24px;font-weight:400}.gsv-mix[open] .gsv-mix-plus{transform:rotate(45deg)}.gsv-teen .gsv-mix-form{padding:0 22px 20px}.gsv-step-label{font-size:11px!important;letter-spacing:.13em;font-weight:750;color:#4c806e;margin:14px 0 10px!important}.gsv-scope-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.gsv-scope-grid label{font-size:13px;display:grid;gap:6px;font-weight:600}.gsv-pool-summary{font-size:13px;margin:12px 0!important;color:#527469}.gsv-presets{display:grid;grid-template-columns:1fr 1fr;gap:12px}.gsv-teen .gsv-presets button{background:#f7faf8;color:#2f5f4e;border-color:#d5e3da;padding:14px;text-align:left;border-radius:12px}.gsv-presets strong,.gsv-presets small{display:block}.gsv-presets small{font-weight:400;font-size:12px;margin-top:5px}.gsv-teen .gsv-presets [aria-pressed=true]{background:#e9f7ed;border:2px solid #338468;padding:13px}.gsv-custom-counts{margin:16px 0;font-size:13px}.gsv-custom-counts summary,.gsv-source-detail>summary{cursor:pointer;color:#547568;font-weight:600;padding:8px 0}.gsv-source-detail{padding:8px 14px;background:#f7faf8;border:1px solid #e3ece6;border-radius:12px;font-size:13px}.gsv-mix-plan{font-weight:700;font-size:14px;color:#3e6b59}.gsv-source-tools,.gsv-source-pages{display:flex;gap:8px;align-items:center;justify-content:center;margin:10px 0}.gsv-source-tools button,.gsv-source-pages button{font-size:12px!important;min-height:40px}.gsv-teen .gsv-mix-sources{max-height:none;border:0;background:transparent;padding:0}.gsv-teen .gsv-mix-sources label{padding:9px 4px;border-bottom:1px solid #e2ece5}.gsv-teen .gsv-mix-go{width:100%;margin-top:12px;padding:13px;font-size:15px;border-radius:13px;box-shadow:0 3px 0 #14524b}
.gsv-teen .gsv-filters{background:#f1f7f4;border:1px solid #e0eae5;border-radius:18px;padding:16px}.gsv-teen .gsv-card{border-radius:20px;border-color:#e0e8e2;box-shadow:0 4px 0 #edf2ef;padding:20px;transition:transform .18s,box-shadow .18s}.gsv-teen .gsv-card:hover{transform:translateY(-3px);box-shadow:0 8px 18px #214b3810}.gsv-teen .gsv-card h3{font-size:18px}.gsv-teen .gsv-card h3 a{color:#254b40}.gsv-teen .gsv-tag{background:#eef5eb;color:#55744c;font-size:12px}.gsv-teen .gsv-resume{background:#eef7f1;color:#285f49;border:1px solid #b9d9c6;border-radius:14px;font-size:14px;padding:14px}.gsv-teen .gsv-effects{font-size:11px;color:#769285;margin:0 0 10px}
@keyframes gsv-breathe{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-9px) rotate(2deg)}}@keyframes gsv-bubble{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}@keyframes gsv-twinkle{0%,100%{opacity:.5;transform:rotate(-10deg) scale(.85)}50%{opacity:1;transform:rotate(12deg) scale(1.1)}}@keyframes gsv-wave{0%,100%{transform:rotate(0)}30%{transform:rotate(-8deg) translateY(-8px)}70%{transform:rotate(6deg)}}
@media(max-width:700px){.gsv-teen .gsv-welcome{grid-template-columns:1fr;padding:22px;gap:0;min-height:0}.gsv-teen .gsv-welcome h1{font-size:32px;max-width:400px}.gsv-teen button.gsv-buddy-scene{height:175px;max-width:340px;width:100%;justify-self:center}.gsv-teen .gsv-buddy-scene img{height:170px;width:160px}.gsv-teen .gsv-buddy-scene::before{width:150px;height:150px;top:18px}.gsv-buddy-bubble{font-size:12px;max-width:145px;right:0;top:8px}.gsv-buddy-heart{left:8%}.gsv-teen .gsv-hero-links{margin:16px 0 12px}.gsv-teen .gsv-hero-links button{padding:10px 12px;font-size:13px}.gsv-name-inline{padding:16px;gap:10px}.gsv-name-heart{width:32px;height:32px;font-size:25px}.gsv-name-inline label{font-size:16px}.gsv-inline-fields input{max-width:none!important;flex-basis:100%!important}.gsv-inline-fields button{padding:9px 10px!important;font-size:12px!important}.gsv-scope-grid{grid-template-columns:1fr}.gsv-teen .gsv-mix>summary{padding:16px 14px;font-size:16px}.gsv-teen .gsv-mix-form{padding:0 14px 16px}.gsv-presets{gap:8px}.gsv-presets strong{font-size:13px}.gsv-mix>summary small{font-size:11px}.gsv-mix-icon{width:34px;height:34px}.gsv-teen .gsv-selection-heading{font-size:21px}.gsv-teen .gsv-mix-counts{grid-template-columns:1fr 1fr}}
@media(prefers-reduced-motion:reduce){.gsv-teen *, .gsv-teen *::before{animation:none!important;transition:none!important}}

/* 1.6: chapter-first learning; mixed exams are secondary. */
.gsv-teen .gsv-paths{grid-template-columns:3fr 1fr}.gsv-learning-guide{padding:16px 20px;border-left:4px solid #218477;background:#eaf7ef;border-radius:12px;color:#254d46}.gsv-chapter-book{border:1px solid #cde2d8;border-radius:18px;background:#fff;margin:14px 0;overflow:hidden}.gsv-chapter-book>summary{cursor:pointer;padding:20px;background:#f0f8f3;color:#174f47}.gsv-chapter-book>summary span{display:inline-grid;gap:6px;max-width:95%;vertical-align:top}.gsv-chapter-book strong{font-size:21px;line-height:1.4}.gsv-chapter-book small{font-size:14px;color:#536d65}.gsv-lesson-row{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:20px;border-top:1px solid #e1ece6}.gsv-lesson-row h3{font-size:18px;line-height:1.5;margin:0;white-space:normal}.gsv-lesson-row h3 a{color:#204f49;text-decoration:none}.gsv-lesson-row p{font-size:14px;color:#58746b;margin:8px 0 0}.gsv-lesson-row button{flex-shrink:0;min-height:44px}.gsv-extra-practice{margin-top:42px;padding-top:22px;border-top:1px solid #d7e6df}.gsv-extra-practice>h2{font-size:20px!important}.gsv-extra-practice>p{font-size:14px}.gsv-extra-practice .gsv-mix{margin-top:12px}.gsv-syllabus:has(.gsv-chapter-book)~.gsv-grid{display:none}.gsv-syllabus:has(.gsv-chapter-book)~.gsv-pagination{display:none}
@media(max-width:700px){.gsv-teen .gsv-paths{grid-template-columns:1fr}.gsv-teen .gsv-paths [data-track=exam]{padding:12px 16px}.gsv-lesson-row{display:block;padding:16px}.gsv-lesson-row button{margin-top:14px;width:100%}.gsv-chapter-book strong{font-size:18px}.gsv-chapter-book>summary{padding:16px}}

.gsv-study-guide{max-width:1280px;margin:24px auto;padding:24px;border:1px solid #d7e6df;border-radius:18px;font:inherit;line-height:1.75;color:#254d46}.gsv-study-guide summary{cursor:pointer;font-weight:700;min-height:44px}.gsv-study-guide h2{font-size:22px}.gsv-study-guide h3{font-size:18px}

/* 1.6.1: a friendly invitation makes the optional exam easy to find. */
.gsv-extra-practice{border-top:0;padding:0;margin-top:36px}.gsv-exam-invite{display:grid;grid-template-columns:190px minmax(0,1fr);gap:28px;align-items:center;padding:30px;background:linear-gradient(125deg,#f0eaff,#fff4df 80%);border:1px solid #dbcce9;border-radius:24px;box-shadow:0 8px 24px #61457a0d}.gsv-invite-character{position:relative;display:grid;justify-items:center}.gsv-invite-character img{width:170px;height:190px;object-fit:contain;animation:gsv-invite-bob 3s ease-in-out infinite}.gsv-invite-spark{position:absolute;left:0;top:6px;color:#956bc0;font-size:30px}.gsv-invite-sticker{background:#fff;padding:6px 12px;border-radius:18px;color:#604084;font-size:13px;font-weight:700;transform:rotate(-4deg)}.gsv-invite-eyebrow{color:#79508e!important;letter-spacing:.08em;font-size:12px!important;font-weight:800;margin:0 0 8px!important}.gsv-teen .gsv-invite-copy h2{font-size:30px!important;color:#3f2c55;line-height:1.3;margin:0 0 12px}.gsv-invite-speech{font-size:19px!important;line-height:1.65;margin:0 0 8px;color:#41384b}.gsv-invite-alias,.gsv-invite-note{font-size:13px!important;color:#645970!important;margin:8px 0}.gsv-invite-options{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}.gsv-invite-options span{background:#ffffffc9;border:1px solid #e9dff1;border-radius:12px;padding:8px 11px;font-size:14px;color:#493a59}.gsv-invite-actions{display:flex;flex-wrap:wrap;gap:10px}.gsv-teen .gsv-invite-actions [data-jump-mix]{background:#715095;color:#fff;border-color:#715095;min-height:48px;box-shadow:0 4px 0 #54376f}.gsv-teen .gsv-invite-actions [data-jump-mix]:hover{background:#5b3e7b}.gsv-teen .gsv-invite-actions [data-jump-mix]:active{transform:translateY(2px);box-shadow:0 2px 0 #54376f}.gsv-extra-practice .gsv-mix{margin-top:16px;border-color:#ddcfea}.gsv-no-effects .gsv-invite-character{display:none}.gsv-no-effects .gsv-exam-invite{grid-template-columns:1fr}@keyframes gsv-invite-bob{0%,100%{transform:translateY(0) rotate(-3deg)}50%{transform:translateY(-9px) rotate(3deg)}}
@media(max-width:700px){.gsv-exam-invite{grid-template-columns:1fr;gap:16px;padding:22px 18px}.gsv-invite-character img{width:110px;height:120px}.gsv-invite-character{width:150px;justify-self:center}.gsv-teen .gsv-invite-copy h2{font-size:25px!important}.gsv-invite-speech{font-size:17px!important}.gsv-invite-options{display:grid}.gsv-invite-actions>*{width:100%}.gsv-invite-note{margin-top:14px}}