:root{--ink:#10264d;--blue:#315cde;--blue2:#2346ad;--soft:#f5f8ff;--line:#dfe7f5;--muted:#61708a;--white:#fff;--green:#187a5a;--shadow:0 18px 50px rgba(16,38,77,.12);--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.55}a{color:inherit}.r23-wrap{width:min(1180px,calc(100% - 32px));margin:auto}.r23-head{position:sticky;top:0;z-index:50;background:#10264ded;color:#fff;backdrop-filter:blur(14px);border-bottom:1px solid #ffffff22}.r23-headin{min-height:72px;display:flex;align-items:center;gap:24px}.r23-logo{display:flex;align-items:center;text-decoration:none;font-weight:900;letter-spacing:-.02em;font-size:1.12rem}.r23-logo img{height:35px;max-width:190px}.r23-nav{display:flex;gap:20px;margin-left:auto}.r23-nav a{text-decoration:none;color:#dfe8ff;font-weight:650;font-size:.93rem}.r23-actions{display:flex;gap:10px}.r23-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;border:0;border-radius:999px;padding:0 19px;font-weight:800;text-decoration:none;cursor:pointer;background:var(--blue);color:white;box-shadow:0 8px 22px rgba(49,92,222,.25)}.r23-btn:hover{background:var(--blue2)}.r23-btn.secondary{background:#fff;color:var(--ink);box-shadow:none;border:1px solid var(--line)}.r23-btn.ghost{background:transparent;color:#fff;border:1px solid #ffffff55;box-shadow:none}.r23-hero{background:radial-gradient(circle at 80% 10%,#5578eb55 0,transparent 28%),linear-gradient(135deg,#0d2245,#18366f 62%,#244fa4);color:#fff;padding:76px 0 64px}.r23-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}.r23-kicker{display:inline-flex;border:1px solid #ffffff33;background:#ffffff13;border-radius:999px;padding:8px 12px;font-weight:800;font-size:.84rem}.r23-hero h1{font-size:clamp(2.5rem,5.2vw,5rem);line-height:1.02;letter-spacing:-.055em;margin:18px 0 20px;max-width:760px}.r23-hero p{font-size:clamp(1.05rem,1.6vw,1.28rem);color:#dce7ff;max-width:680px;margin:0 0 28px}.r23-hero-actions{display:flex;gap:12px;flex-wrap:wrap}.r23-proof{display:flex;gap:24px;flex-wrap:wrap;margin-top:30px;color:#dce7ff;font-size:.92rem}.r23-proof strong{display:block;color:#fff;font-size:1.25rem}.r23-preview{background:#fff;color:var(--ink);border-radius:28px;padding:22px;box-shadow:0 30px 80px #06142c66;transform:rotate(1deg)}.r23-preview-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.r23-preview-head span{font-size:.82rem;color:var(--muted);background:var(--soft);padding:6px 10px;border-radius:999px}.r23-mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.r23-mini{border:1px solid var(--line);border-radius:18px;padding:15px}.r23-mini img{width:58px;height:46px;object-fit:cover;border-radius:12px;float:right}.r23-mini strong{display:block}.r23-mini small{color:var(--muted)}.r23-section{padding:78px 0}.r23-section.soft{background:var(--soft)}.r23-section-head{max-width:760px;margin-bottom:34px}.r23-section-head.center{text-align:center;margin-left:auto;margin-right:auto}.r23-section h2{font-size:clamp(2rem,3.6vw,3.25rem);line-height:1.05;letter-spacing:-.04em;margin:0 0 14px}.r23-section-head p{color:var(--muted);font-size:1.08rem}.r23-catalog{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.r23-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 10px 28px rgba(16,38,77,.06);display:flex;flex-direction:column;min-height:100%}.r23-card-media{aspect-ratio:16/9;background:#eaf0ff;overflow:hidden}.r23-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .25s}.r23-card:hover .r23-card-media img{transform:scale(1.03)}.r23-card-body{padding:20px;display:flex;flex-direction:column;flex:1}.r23-card h3{font-size:1.35rem;margin:0 0 7px}.r23-card p{color:var(--muted);margin:0 0 16px}.r23-card-meta{font-size:.84rem;font-weight:800;color:var(--blue);margin-top:auto;margin-bottom:14px}.r23-card-actions{display:flex;gap:9px}.r23-card-actions .r23-btn{flex:1;min-height:40px;padding:0 13px;font-size:.9rem}.r23-steps{display:grid;grid-template-columns:repeat(5,1fr);gap:15px}.r23-step{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.r23-step b{display:grid;place-items:center;width:34px;height:34px;background:#e8eeff;color:var(--blue);border-radius:50%;margin-bottom:12px}.r23-step h3{font-size:1rem;margin:0 0 6px}.r23-step p{font-size:.9rem;color:var(--muted);margin:0}.r23-band{background:#10264d;color:#fff;border-radius:28px;padding:34px;display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center}.r23-band h2{margin:0 0 8px;font-size:clamp(1.6rem,3vw,2.6rem)}.r23-band p{color:#dce7ff;margin:0}.r23-footer{background:#0c1b36;color:#dce7ff;padding:34px 0}.r23-footer-in{display:flex;justify-content:space-between;gap:20px;align-items:center}.r23-footer a{color:#fff}.r23-modal{position:fixed;inset:0;background:#06142caa;z-index:100;display:none;align-items:center;justify-content:center;padding:20px}.r23-modal.open{display:flex}.r23-modal-dialog{width:min(940px,100%);max-height:min(88vh,900px);overflow:auto;background:#fff;border-radius:26px;box-shadow:var(--shadow);position:relative}.r23-modal-close{position:sticky;float:right;top:14px;margin:14px 14px -50px 0;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;font-size:1.35rem;z-index:2;cursor:pointer}.r23-modal-hero{display:grid;grid-template-columns:1.15fr .85fr;gap:25px;padding:34px;background:linear-gradient(135deg,#f6f8ff,#edf2ff)}.r23-modal-hero img{width:100%;border-radius:20px}.r23-modal-hero h2{font-size:2.1rem;line-height:1.06;margin:8px 0 12px;letter-spacing:-.04em}.r23-modal-hero p{color:var(--muted)}.r23-modal-body{padding:30px 34px 36px}.r23-modal-courses{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.r23-course-option{border:1px solid var(--line);border-radius:16px;padding:15px;text-decoration:none}.r23-course-option strong{display:block}.r23-course-option span{font-size:.88rem;color:var(--muted)}.r23-modal-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:24px}.r23-info{border-top:1px solid var(--line);padding-top:18px}.r23-info h3{font-size:1rem;margin:0 0 7px}.r23-info p,.r23-info li{color:var(--muted);font-size:.94rem}.r23-modal-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.r23-course-shell{min-height:100vh;background:#f5f8ff}.r23-course-top{background:#10264d;color:#fff}.r23-course-top .r23-wrap{min-height:70px;display:flex;align-items:center;gap:14px}.r23-course-top .back{color:#fff;text-decoration:none}.r23-course-title{margin-left:auto;font-weight:800}.r23-classroom{padding:28px 0 56px;display:grid;grid-template-columns:290px 1fr;gap:22px}.r23-side,.r23-main{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:0 8px 24px rgba(16,38,77,.05)}.r23-side{padding:18px;align-self:start;position:sticky;top:18px}.r23-side h2{font-size:1.05rem;margin:0 0 12px}.r23-unit-list{display:grid;gap:7px}.r23-unit-btn{width:100%;text-align:left;border:0;background:transparent;border-radius:12px;padding:10px 11px;cursor:pointer;color:var(--ink)}.r23-unit-btn:hover,.r23-unit-btn.active{background:#edf2ff;color:var(--blue)}.r23-main{padding:28px;min-height:560px}.r23-main h1{font-size:2rem;letter-spacing:-.03em;margin-top:0}.r23-lesson{font-size:1.06rem;color:#36465f;background:#f7f9fd;border-left:4px solid var(--blue);padding:16px;border-radius:12px}.r23-question{border:1px solid var(--line);border-radius:16px;padding:17px;margin:18px 0}.r23-question fieldset{border:0;padding:0;margin:0}.r23-question legend{font-weight:800;margin-bottom:12px}.r23-option{display:flex;gap:9px;padding:9px 10px;border-radius:10px}.r23-option:hover{background:#f5f8ff}.r23-feedback{display:none;margin-top:12px;border-radius:10px;padding:10px;font-size:.92rem}.r23-feedback.ok{display:block;background:#eaf8f2;color:#0e684b}.r23-feedback.bad{display:block;background:#fff0ef;color:#a22e25}.r23-progressbar{height:8px;background:#e5eaf3;border-radius:999px;overflow:hidden;margin:12px 0 20px}.r23-progressbar i{display:block;height:100%;background:var(--blue);width:0}.r23-landing-hero{padding:64px 0 46px;background:linear-gradient(135deg,#0d2245,#20468f);color:#fff}.r23-landing-grid{display:grid;grid-template-columns:1fr 340px;gap:40px;align-items:center}.r23-landing-hero img{width:100%;border-radius:24px}.r23-landing-hero h1{font-size:clamp(2.4rem,5vw,4.2rem);line-height:1.02;letter-spacing:-.05em;margin:12px 0}.r23-landing-hero p{font-size:1.1rem;color:#dce7ff}.r23-content-grid{display:grid;grid-template-columns:1fr 310px;gap:34px}.r23-toc{position:sticky;top:92px;align-self:start;border:1px solid var(--line);border-radius:18px;padding:18px}.r23-toc a{display:block;padding:7px 0;color:var(--muted);text-decoration:none}.r23-faq details{border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin:10px 0}.r23-faq summary{font-weight:800;cursor:pointer}.r23-sr{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}@media(max-width:900px){.r23-nav{display:none}.r23-hero-grid,.r23-landing-grid,.r23-content-grid{grid-template-columns:1fr}.r23-preview{transform:none}.r23-catalog{grid-template-columns:repeat(2,1fr)}.r23-steps{grid-template-columns:repeat(2,1fr)}.r23-modal-hero{grid-template-columns:1fr}.r23-classroom{grid-template-columns:1fr}.r23-side{position:static}.r23-toc{display:none}}@media(max-width:600px){.r23-wrap{width:min(100% - 20px,1180px)}.r23-headin{min-height:62px}.r23-actions .ghost{display:none}.r23-logo img{height:30px}.r23-hero{padding:52px 0 46px}.r23-catalog,.r23-modal-courses,.r23-modal-grid,.r23-mini-grid{grid-template-columns:1fr}.r23-steps{grid-template-columns:1fr}.r23-band{grid-template-columns:1fr}.r23-footer-in{display:block}.r23-modal{padding:8px}.r23-modal-dialog{max-height:96vh;border-radius:20px}.r23-modal-hero,.r23-modal-body{padding:22px}.r23-classroom{padding-top:14px}.r23-main{padding:20px}.r23-card-actions{flex-direction:column}.r23-course-title{font-size:.88rem}.r23-proof{gap:15px}}

/* R23 QA02 production-readiness polish */
.r23-media-btn{border:0;padding:0;width:100%;cursor:pointer;text-align:left}.r23-card-tag{display:inline-flex;align-self:flex-start;background:#eef3ff;color:var(--blue);font-size:.76rem;font-weight:900;padding:5px 9px;border-radius:999px;margin-bottom:10px}.r23-card-list{padding:0;margin:0 0 18px;list-style:none;color:#43536c;font-size:.9rem}.r23-card-list li{padding:4px 0 4px 22px;position:relative}.r23-card-list li:before{content:'✓';position:absolute;left:0;color:var(--green);font-weight:900}.r23-modal-section-title{display:flex;gap:12px;align-items:flex-start;margin:22px 0 14px}.r23-modal-section-title>span{display:grid;place-items:center;min-width:32px;height:32px;border-radius:50%;background:#e8eeff;color:var(--blue);font-weight:900}.r23-modal-section-title h3{margin:0}.r23-modal-section-title p{margin:2px 0 0;color:var(--muted);font-size:.9rem}.r23-course-option{background:#fff;text-align:left;cursor:pointer;color:var(--ink)}.r23-course-option:hover,.r23-course-option.selected{border-color:#7d9af0;background:#f5f8ff;box-shadow:0 0 0 2px #dce5ff}.r23-course-option small{display:block;color:var(--blue);font-weight:800;margin-top:7px}.r23-selected-course{margin-top:12px;padding:14px 16px;border-radius:14px;background:#10264d;color:#fff;display:flex;justify-content:space-between;gap:12px}.r23-selected-course span{color:#dce7ff;font-size:.9rem}.r23-kicker.blue{color:#315cde;border-color:#cbd8ff;background:#fff}.r23-lead{font-size:1.08rem;color:var(--muted);max-width:780px}.r23-study-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:26px 0}.r23-study-card{border:1px solid var(--line);border-radius:20px;background:#fff;padding:22px;text-align:left;color:var(--ink);cursor:pointer}.r23-study-card:hover{border-color:#9ab0ef;transform:translateY(-1px)}.r23-study-card.featured{background:#10264d;color:#fff}.r23-study-card b{color:var(--blue);font-size:.8rem}.r23-study-card.featured b,.r23-study-card.featured p{color:#dce7ff}.r23-study-card h2{margin:6px 0;font-size:1.25rem}.r23-study-card p{margin:0;color:var(--muted)}.r23-note{border-left:4px solid #f1b943;background:#fff9e9;padding:14px 16px;border-radius:12px}.r23-note p{margin:4px 0;color:#5f5360}.practice-title{margin-top:30px}.r23-qnum{float:right;font-size:.78rem;color:var(--muted)}.r23-question .check{margin-top:12px}.r23-option:has(input:checked){background:#edf2ff;box-shadow:inset 0 0 0 1px #a9baf0}.r23-option.answer-ok{background:#eaf8f2!important}.r23-option.answer-bad{background:#fff0ef!important}.r23-feedback strong{font-size:.96rem}.r23-nav-row{display:flex;justify-content:space-between;gap:10px;margin-top:26px}.r23-exam-meta{display:flex;gap:10px;margin:16px 0 24px}.r23-exam-meta span{background:#eef3ff;color:#315cde;padding:7px 10px;border-radius:999px;font-size:.82rem;font-weight:900}.r23-btn.finish{margin:22px 0}.r23-result{text-align:center;padding:54px 20px}.r23-result>span{font-weight:900;color:var(--muted)}.r23-result>strong{display:block;font-size:5rem;line-height:1;color:var(--blue);margin:12px}.r23-result h1{font-size:1.8rem}.r23-result p{max-width:620px;margin:0 auto 22px;color:var(--muted)}.r23-signup-course{border:1px solid #dfe7f5;background:#f7f9ff;border-radius:16px;padding:14px;margin:12px 0}.r23-signup-course label>span{display:block;font-weight:800;margin-bottom:6px}.r23-signup-course select{width:100%;min-height:46px;border:1px solid #cfd9ea;border-radius:12px;padding:0 12px;background:#fff}.r23-signup-course small{display:block;margin-top:7px;color:#61708a}@media(max-width:650px){.r23-study-grid{grid-template-columns:1fr}.r23-selected-course{display:block}.r23-nav-row{flex-wrap:wrap}.r23-nav-row .r23-btn{flex:1}.r23-modal-dialog{border-radius:18px}.r23-modal-hero img{max-height:220px;object-fit:cover}}
/* R23 QA04 · responsive, contextual color and academic runtime */
:root{--course-accent:#315cde;--course-soft:#eef3ff}.r23-card{overflow:hidden;position:relative;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.r23-card:hover{transform:translateY(-3px);box-shadow:0 18px 42px rgba(16,38,77,.12)}.r23-card[data-program="english"]{--card-accent:#315cde;--card-soft:#eef3ff}.r23-card[data-program="nautical"]{--card-accent:#087b99;--card-soft:#e7f7fb}.r23-card[data-program="lifeguard"]{--card-accent:#d94b43;--card-soft:#fff0ef}.r23-card[data-program="food"]{--card-accent:#278d5b;--card-soft:#eaf8f2}.r23-card[data-program="dpd"]{--card-accent:#6554b8;--card-soft:#f1efff}.r23-card[data-program="drones"]{--card-accent:#3c6891;--card-soft:#edf5fb}.r23-card:before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:var(--card-accent,var(--blue))}.r23-card-tag{background:var(--card-soft,#eef3ff);color:var(--card-accent,var(--blue))}.r23-card-media img{aspect-ratio:1200/760;object-fit:cover;display:block}.r23-stats-band{margin-top:-30px;position:relative;z-index:3}.r23-live-stats{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);overflow:hidden}.r23-live-stat{padding:22px 24px;border-right:1px solid var(--line)}.r23-live-stat:last-child{border:0}.r23-live-stat strong{display:block;font-size:clamp(1.7rem,3vw,2.5rem);color:#10264d;line-height:1}.r23-live-stat span{display:block;color:var(--muted);font-size:.88rem;margin-top:7px}.r23-live-stat small{display:block;color:#8290a6;font-size:.75rem;margin-top:3px}.r23-kicker.course{color:var(--course-accent);border-color:color-mix(in srgb,var(--course-accent) 30%,white);background:var(--course-soft)}.r23-course-top{background:linear-gradient(120deg,#10264d,var(--course-accent))}.r23-unit-btn{display:grid;grid-template-columns:32px 1fr;gap:8px;align-items:start}.r23-unit-btn>span{display:grid;place-items:center;width:28px;height:28px;border-radius:9px;background:#f0f3f8;color:#697991;font-weight:900;font-size:.76rem}.r23-unit-btn>b{font-size:.88rem;line-height:1.25;padding-top:5px}.r23-unit-btn>small{grid-column:2;color:#278d5b}.r23-unit-btn.active{background:var(--course-soft);color:var(--course-accent)}.r23-unit-btn.done>span{background:#eaf8f2;color:#137454}.r23-course-dashboard h1,.r23-main h1{max-width:850px}.r23-overall{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;margin:22px 0;background:#f8faff;border:1px solid var(--line);padding:16px;border-radius:16px}.r23-overall>div:first-child strong{display:block;font-size:1.6rem;color:var(--course-accent)}.r23-overall>div:first-child span{font-size:.75rem;color:var(--muted)}.r23-overall .r23-progressbar{margin:0}.r23-overall .r23-progressbar i{background:var(--course-accent)}.r23-resume{width:100%;display:flex;justify-content:space-between;gap:15px;align-items:center;text-align:left;border:1px solid color-mix(in srgb,var(--course-accent) 30%,white);background:var(--course-soft);color:#17243a;border-radius:16px;padding:15px 17px;cursor:pointer;margin-bottom:18px}.r23-resume span{font-size:.84rem;color:var(--muted)}.r23-study-grid{grid-template-columns:repeat(3,1fr)}.r23-study-card.featured{background:linear-gradient(135deg,#10264d,var(--course-accent))}.r23-study-card.final{border-color:var(--course-accent);box-shadow:inset 0 0 0 1px var(--course-accent)}.r23-study-card b{color:var(--course-accent)}.r23-crumb{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--course-accent);font-weight:900}.r23-unit-summary{font-size:1.08rem;color:#53637b}.r23-theory{display:grid;gap:10px;margin:22px 0}.r23-theory>div{display:grid;grid-template-columns:34px 1fr;gap:12px;padding:13px 14px;background:#f8faff;border:1px solid #e7ecf5;border-radius:14px}.r23-theory>div>span{display:grid;place-items:center;width:28px;height:28px;background:var(--course-soft);color:var(--course-accent);border-radius:9px;font-weight:900}.r23-theory p{margin:2px 0;line-height:1.58}.r23-helptext{color:var(--muted)}.r23-options{display:grid;gap:8px}.r23-option{align-items:center;border:1px solid transparent;cursor:pointer}.r23-option .letter{display:grid;place-items:center;min-width:28px;height:28px;border-radius:8px;background:#eef2f7;font-weight:900;color:#65748b}.r23-option:has(input:checked){border-color:var(--course-accent);background:var(--course-soft)}.r23-option:has(input:checked) .letter{background:var(--course-accent);color:#fff}.r23-question{scroll-margin-top:18px}.r23-question legend{font-size:1.02rem;line-height:1.45;padding-right:42px}.r23-feedback p{margin:4px 0 0;line-height:1.45}.r23-assessment-head{display:flex;justify-content:space-between;gap:25px;align-items:start}.r23-timer{position:sticky;top:12px;background:#10264d;color:#fff;font-size:1.3rem;font-weight:900;padding:12px 15px;border-radius:13px;min-width:92px;text-align:center}.r23-timer.urgent{background:#b7352d}.r23-exam-meta{flex-wrap:wrap}.r23-exam-meta .wide{flex-basis:100%;border-radius:12px;line-height:1.4}.r23-result.pass>strong{color:#18845f}.r23-result.fail>strong{color:#b33a32}.r23-rule-alert{max-width:650px;margin:18px auto;padding:14px 16px;background:#fff0ef;color:#812c27;border-radius:14px;text-align:left}.r23-rule-alert p{margin:6px 0}.r23-inline-error{padding:11px 14px;background:#fff0ef;color:#8a2b24;border-radius:11px;margin:12px 0}.r23-empty{padding:30px}.r23-btn:disabled{opacity:.45;cursor:not-allowed}.r23-btn,.r23-course-option,.r23-unit-btn,.r23-study-card{min-height:44px}.r23-modal-dialog{overscroll-behavior:contain}.r23-modal-hero img{aspect-ratio:1200/760;object-fit:cover}.r23-modal-body{padding-bottom:42px}
@media(max-width:1050px){.r23-study-grid{grid-template-columns:repeat(2,1fr)}.r23-live-stats{grid-template-columns:repeat(2,1fr)}.r23-live-stat:nth-child(2){border-right:0}.r23-live-stat:nth-child(-n+2){border-bottom:1px solid var(--line)}}
@media(max-width:760px){.r23-classroom{display:block}.r23-side{margin-bottom:14px}.r23-unit-list{display:flex;overflow:auto;gap:8px;padding-bottom:5px;scroll-snap-type:x proximity}.r23-unit-btn{min-width:200px;scroll-snap-align:start;border:1px solid var(--line)}.r23-overall{grid-template-columns:1fr}.r23-overall small{display:none}.r23-assessment-head{display:block}.r23-timer{position:sticky;top:4px;z-index:4;width:max-content;margin-left:auto}.r23-question{padding:15px}.r23-nav-row{position:sticky;bottom:6px;background:#ffffffee;backdrop-filter:blur(10px);padding:8px;border:1px solid var(--line);border-radius:14px;z-index:4}}
@media(max-width:560px){.r23-live-stats{grid-template-columns:1fr}.r23-live-stat{border-right:0!important;border-bottom:1px solid var(--line)!important}.r23-live-stat:last-child{border-bottom:0!important}.r23-study-grid{grid-template-columns:1fr}.r23-main{border-radius:16px;padding:16px}.r23-question legend{font-size:.98rem}.r23-option{padding:10px 8px}.r23-modal-cta .r23-btn{width:100%;justify-content:center}.r23-proof{display:grid;grid-template-columns:1fr 1fr}.r23-proof span:last-child{grid-column:1/-1}}
@media(min-width:1350px){.r23-catalog{grid-template-columns:repeat(3,1fr);gap:22px}.r23-wrap{width:min(100% - 56px,1280px)}}
/* QA09 public course landing polish */
.r23-landing-hero{padding:42px 0 34px}
.r23-landing-grid{grid-template-columns:minmax(0,1fr) minmax(280px,380px);gap:30px}
.r23-landing-hero img{width:100%;height:230px;object-fit:cover;object-position:center;border-radius:20px}
.r23-toc .r23-btn{color:#fff!important;background:#315cde!important;border-color:#315cde!important;text-align:center;margin-top:8px}
.r23-toc .r23-btn:hover{background:#2346ad!important}
.r23-section{padding:54px 0}
.r23-content-grid article>section{scroll-margin-top:90px}
@media(max-width:900px){.r23-landing-grid{grid-template-columns:1fr}.r23-landing-hero img{height:210px;max-width:560px}.r23-section{padding:42px 0}}
@media(max-width:600px){.r23-landing-hero{padding:28px 0 24px}.r23-landing-hero h1{font-size:2.25rem}.r23-landing-hero img{height:175px;border-radius:16px}.r23-section{padding:32px 0}.landing-units{grid-template-columns:1fr!important}}
/* QA09 R3 academic progression hardening */
.r23-study-card.locked{opacity:.62;cursor:not-allowed;filter:saturate(.65)}
.r23-study-card.locked:hover{transform:none;box-shadow:none}
.r23-lock-note{display:block;margin-top:.7rem;color:#6a7890;font-size:.76rem;line-height:1.35}
.r23-unit-btn.studied{border-color:#e7b95e;background:#fffaf0}
.r23-unit-btn.studied>span{background:#fff0c7;color:#835d0b}


/* R23 QA12 R17 course landing polish */
.r23-landing-grid{align-items:center;gap:clamp(24px,4vw,64px)}
.r23-landing-grid>img{box-shadow:0 20px 55px rgba(12,35,65,.12)}
.landing-units li{min-height:108px}
@media(max-width:900px){.r23-landing-grid{grid-template-columns:1fr}.r23-steps{grid-template-columns:1fr 1fr!important}}
@media(max-width:620px){.r23-steps{grid-template-columns:1fr!important}.r23-actions{gap:8px}.r23-actions .r23-btn{padding-inline:12px}}

/* R23 QA12 R17 course landing spacing */
.r23-landing-hero .r23-back{margin-bottom:22px}.r23-landing-hero .r23-back+.r23-kicker{margin-left:12px}.r23-landing-grid>div{min-width:0}.r23-landing-grid>img{width:100%;aspect-ratio:5/3;object-fit:cover;object-position:center;border-radius:24px}
@media(max-width:700px){.r23-landing-hero .r23-back{margin-bottom:10px}.r23-landing-hero .r23-back+.r23-kicker{margin-left:0;display:flex;width:max-content;margin-bottom:18px}}

.r23-landing-hero .r23-back{display:flex;width:max-content;margin-bottom:12px}.r23-landing-hero .r23-back+.r23-kicker{margin-left:0;display:flex;width:max-content;margin-bottom:18px}

/* R23 QA12 R17 — course landing navigation spacing */
.r23-landing-hero .r23-back{margin-right:0!important;margin-bottom:18px!important}.r23-landing-hero .r23-back+.r23-kicker{display:block!important;margin-left:0!important;margin-top:0!important}.r23-landing-grid>div:first-child{display:block}.r23-landing-grid>img{object-fit:cover!important;object-position:center!important;filter:none!important}

/* R23 QA12 R17 — course page spacing and media */
.r23-landing-grid>div>.r23-back{margin-right:16px;margin-bottom:24px!important}
.r23-landing-grid>div>.r23-back + .r23-kicker{margin-left:4px}
.r23-landing-grid>img{aspect-ratio:16/9!important;object-fit:cover!important;image-rendering:auto!important}
@media(max-width:700px){.r23-landing-grid>div>.r23-back{display:flex;width:max-content;margin-bottom:18px!important}.r23-landing-grid>div>.r23-back + .r23-kicker{display:inline-flex;margin-left:0}}

/* R18 · new families use photographic masters and full landing treatment */
.r23-page .r23-nav{min-height:72px;padding:0 max(24px,calc((100vw - 1180px)/2));display:flex;align-items:center;background:#10264d;color:#fff;gap:22px}
.r23-page .r23-nav .r23-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;font-weight:900}
.r23-page .r23-nav .r23-brand img{width:42px;height:42px}.r23-page .r23-nav .r23-back{margin-left:auto;color:#fff;text-decoration:none;font-weight:800}
.r23-page .r23-shell{width:min(1180px,calc(100% - 32px));margin:auto;padding:46px 0 70px}
.r23-page .r23-landing-grid{background:linear-gradient(135deg,#0e2852,#214c8c);color:#fff;border-radius:30px;padding:clamp(26px,4vw,52px);grid-template-columns:minmax(0,1fr) minmax(330px,43%);box-shadow:0 24px 70px rgba(16,38,77,.16)}
.r23-page .r23-landing-grid .r23-kicker{background:#ffffff18;border-color:#ffffff33;color:#fff}
.r23-page .r23-landing-grid h1{font-size:clamp(2.5rem,5vw,4.6rem);line-height:1;letter-spacing:-.055em;margin:14px 0}
.r23-page .r23-landing-grid .r23-lead{color:#e7efff;font-size:1.16rem}
.r23-page .r23-landing-grid>img{height:100%;min-height:310px;max-height:430px;aspect-ratio:16/10!important;border-radius:24px;box-shadow:0 18px 50px #071a3966}
.r23-page .r15-scope{background:#ffffff12;border-color:#ffffff28}.r23-page .r15-scope span{color:#e1eaff}
.r23-page .r15-meta div{background:#ffffff12;border-color:#ffffff28}.r23-page .r15-meta small{color:#c9d8f3}.r23-page .r15-meta b{color:#fff}
.r23-page .r23-section{padding:58px 0 0}.r23-page .r23-section>h2{max-width:900px}.r23-page .landing-units{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;padding:0;list-style:none}
.r23-page .landing-units li{background:#fff;border:1px solid #dfe7f5;border-radius:18px;padding:18px;box-shadow:0 8px 24px rgba(16,38,77,.05)}
.r23-page .landing-units li b{display:block;font-size:1rem}.r23-page .landing-units li span{display:block;margin-top:7px;color:#65778e;line-height:1.5}
@media(max-width:900px){.r23-page .r23-landing-grid{grid-template-columns:1fr}.r23-page .r23-landing-grid>img{min-height:220px;max-height:330px}.r23-page .landing-units{grid-template-columns:1fr}}
@media(max-width:600px){.r23-page .r23-shell{width:min(100% - 20px,1180px);padding-top:18px}.r23-page .r23-landing-grid{padding:22px;border-radius:22px}.r23-page .r23-nav{padding:0 12px}.r23-page .r23-nav .r23-brand span{display:none}}
/* R28 multimedia questions */
.r28-question-media{margin:14px 0 18px;padding:0}.r28-question-media img{display:block;width:min(100%,760px);max-height:440px;object-fit:contain;border-radius:14px;border:1px solid #d9e3ef;background:#fff;margin:0 auto}.r28-question-media figcaption{margin-top:7px;text-align:center;color:#66778f;font-size:.82rem;line-height:1.4}
/* R23 V5: English uses the canonical classroom shell; rich legacy exercise rendering is embedded only in the content pane. */
.ac-english-stage-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin:18px 0}.ac-english-stage{border:1px solid #d9e2f0;border-radius:14px;padding:14px;background:#fff;display:flex;gap:10px;align-items:flex-start}.ac-english-stage>span{display:grid;place-items:center;min-width:30px;height:30px;border-radius:10px;background:#eef3ff;font-weight:800;color:#173a78}.ac-english-stage.done{background:#eef9f3;border-color:#b9e1c9}.ac-english-stage.done>span{background:#d8f1e2;color:#14643b}.ac-english-stage.disabled{opacity:.55}.ac-english-stage b,.ac-english-stage small{display:block}.ac-english-stage small{margin-top:4px;color:#61708a}.ac-english-task-intro{margin:20px 0}.ac-english-embedded{width:100%}.ac-english-embedded-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:16px}.ac-english-embedded iframe{display:none!important}.ac-english-dashboard .r23-study-card{min-height:150px}@media(max-width:900px){.ac-english-stage-grid{grid-template-columns:1fr 1fr}.ac-english-embedded iframe{display:none!important}}@media(max-width:560px){.ac-english-stage-grid{grid-template-columns:1fr}.ac-english-embedded-head{display:block}.ac-english-embedded-head .r23-btn{margin-top:10px;width:100%}}
/* R23 V7 canonical English native runner: no iframe, no nested shell. */
.ac-english-stage-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.ac-english-stage.learning{background:#fffaf0;border-style:dashed}.ac-native-runner{width:100%}.ac-native-progress{height:8px;border-radius:999px;background:#e8edf7;overflow:hidden;margin:0 0 18px}.ac-native-progress>i{display:block;height:100%;background:var(--course-accent,#315cde)}.ac-native-question{border:1px solid #dce4f1;border-radius:18px;background:#fff;padding:24px}.ac-native-question h2{font-size:clamp(1.25rem,2.2vw,1.7rem);margin:20px 0}.ac-native-source{white-space:pre-wrap;background:#f6f8fc;border:1px solid #e2e8f2;border-radius:14px;padding:18px;line-height:1.65;margin-bottom:18px}.ac-native-listening{display:flex;flex-wrap:wrap;gap:12px;align-items:center;background:#f6f8fc;border-radius:14px;padding:16px;margin-bottom:18px}.ac-native-listening small{width:100%;color:#66738a}.ac-native-options{display:grid;gap:10px}.ac-native-option{display:block;cursor:pointer}.ac-native-option input{position:absolute;opacity:0;pointer-events:none}.ac-native-option span{display:flex;gap:12px;align-items:center;border:1px solid #d9e2f0;border-radius:14px;padding:14px 16px;background:#fff}.ac-native-option span b{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:#eef3ff}.ac-native-option input:checked+span{border-color:var(--course-accent,#315cde);box-shadow:0 0 0 3px color-mix(in srgb,var(--course-accent,#315cde) 15%,transparent)}.ac-native-textarea{width:100%;border:1px solid #cbd7e7;border-radius:14px;padding:14px;resize:vertical;min-height:92px}.ac-native-speech{display:flex;gap:12px;align-items:center;margin-top:12px}.ac-native-speech span{color:#66738a;font-size:.92rem}@media(max-width:700px){.ac-english-stage-grid{grid-template-columns:1fr}.ac-native-question{padding:17px}.ac-native-speech{align-items:stretch;flex-direction:column}}
/* R23 V7 canonical English native runner: no iframe, no nested shell. */
.ac-english-stage-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.ac-english-stage.learning{background:#fffaf0;border-style:dashed}.ac-native-runner{width:100%}.ac-native-progress{height:8px;border-radius:999px;background:#e8edf7;overflow:hidden;margin:0 0 18px}.ac-native-progress>i{display:block;height:100%;background:var(--course-accent,#315cde)}.ac-native-question{border:1px solid #dce4f1;border-radius:18px;background:#fff;padding:24px}.ac-native-question h2{font-size:clamp(1.25rem,2.2vw,1.7rem);margin:20px 0}.ac-native-source{white-space:pre-wrap;background:#f6f8fc;border:1px solid #e2e8f2;border-radius:14px;padding:18px;line-height:1.65;margin-bottom:18px}.ac-native-listening{display:flex;flex-wrap:wrap;gap:12px;align-items:center;background:#f6f8fc;border-radius:14px;padding:16px;margin-bottom:18px}.ac-native-listening small{width:100%;color:#66738a}.ac-native-options{display:grid;gap:10px}.ac-native-option{display:block;cursor:pointer}.ac-native-option input{position:absolute;opacity:0;pointer-events:none}.ac-native-option span{display:flex;gap:12px;align-items:center;border:1px solid #d9e2f0;border-radius:14px;padding:14px 16px;background:#fff}.ac-native-option span b{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:#eef3ff}.ac-native-option input:checked+span{border-color:var(--course-accent,#315cde);box-shadow:0 0 0 3px rgba(49,92,222,.12)}.ac-native-textarea{width:100%;border:1px solid #cbd7e7;border-radius:14px;padding:14px;resize:vertical;min-height:92px}.ac-native-speech{display:flex;gap:12px;align-items:center;margin-top:12px}.ac-native-speech span{color:#66738a;font-size:.92rem}@media(max-width:700px){.ac-english-stage-grid{grid-template-columns:1fr}.ac-native-question{padding:17px}.ac-native-speech{align-items:stretch;flex-direction:column}}

/* R23 V9 · shared pedagogical answer feedback */
.ac-answer-feedback{margin:18px 0 4px;border:1px solid #dbe5f2;border-radius:18px;padding:16px;background:#fff;box-shadow:0 8px 22px rgba(16,38,77,.06);display:grid;gap:12px}
.ac-answer-feedback.is-correct{border-color:#b9e3cf;background:linear-gradient(180deg,#f3fcf7,#fff)}
.ac-answer-feedback.is-wrong{border-color:#f0c9c5;background:linear-gradient(180deg,#fff6f4,#fff)}
.ac-answer-feedback-head{display:flex;align-items:center;gap:12px}.ac-answer-feedback-head h3{margin:1px 0 0;font-size:1.08rem}.ac-answer-feedback-head small{font-size:.72rem;text-transform:uppercase;letter-spacing:.07em;font-weight:900;color:#64748b}
.ac-answer-feedback-icon{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-weight:1000;font-size:1.05rem;flex:0 0 auto}.is-correct .ac-answer-feedback-icon{background:#daf4e6;color:#14794e}.is-wrong .ac-answer-feedback-icon{background:#fde1dd;color:#a83a32}
.ac-answer-feedback-row,.ac-answer-feedback-explanation{border-radius:13px;padding:11px 13px;background:#f6f8fc;display:grid;gap:4px}.ac-answer-feedback-row span,.ac-answer-feedback-explanation>span{font-size:.7rem;text-transform:uppercase;letter-spacing:.06em;font-weight:900;color:#64748b}.ac-answer-feedback-row strong{font-size:.95rem}.ac-answer-feedback-explanation p{margin:0;line-height:1.5}.ac-answer-feedback-explanation.is-secondary{background:#fff8ef}
.ac-answer-feedback-tip{display:flex;gap:8px;align-items:flex-start;padding:10px 12px;border-radius:12px;background:#edf5ff;color:#294d79;font-size:.84rem}.ac-answer-feedback-tip b{white-space:nowrap}
@media(max-width:640px){.ac-answer-feedback{padding:13px;border-radius:15px}.ac-answer-feedback-tip{display:grid;gap:3px}}
\n/* R47 V14 RC6 FIX2 · canonical English Daily Words inside classroom shell */\n.ac-english-task .ac-progress-track{height:9px;background:#e7edf7;border-radius:999px;overflow:hidden;margin:18px 0 22px}.ac-english-task .ac-progress-track>i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#315cde,#2d8fb3);transition:width .2s ease}.ac-english-task .dw-lesson-shell{max-width:980px;margin:0 auto;border:1px solid #dce5f2;border-radius:22px;background:#fff;box-shadow:0 12px 34px rgba(16,38,77,.07);overflow:hidden}.ac-english-task .dw-lesson-head{padding:20px 24px 12px;border-bottom:1px solid #edf1f7}.ac-english-task .dw-lesson-head .eyebrow{display:inline-flex;padding:6px 10px;border-radius:999px;background:#eef3ff;color:#244bb4;font-size:.75rem;font-weight:900;letter-spacing:.04em}.ac-english-task .dw-lesson-head h2{margin:12px 0 0;font-size:clamp(1.35rem,2.3vw,1.8rem);letter-spacing:-.025em}.ac-english-task .dw-lesson-body{padding:24px;display:grid;gap:18px}.ac-english-task .dw-theory-card{border:0;padding:0;background:transparent}.ac-english-task .dw-theory-card>.badge{display:none}.ac-english-task .dw-theory-card h2{font-size:clamp(2rem,4vw,3rem);margin:0 0 4px;letter-spacing:-.04em}.ac-english-task .dw-translation{font-size:1.1rem;font-weight:800;color:#315cde;margin:0 0 6px}.ac-english-task .dw-theory-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0}.ac-english-task .dw-theory-grid section{padding:15px 16px;border:1px solid #e0e8f4;border-radius:15px;background:#f8faff}.ac-english-task .dw-theory-grid section strong{display:block;margin-bottom:5px;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:#5d6e86}.ac-english-task .dw-theory-grid section p{margin:0;line-height:1.55}.ac-english-task .dw-theory-card blockquote{margin:18px 0;padding:15px 17px;border-left:4px solid #315cde;background:#f5f8ff;border-radius:12px;font-style:normal}.ac-english-task .dw-question{display:grid;gap:16px;margin:0;max-width:none}.ac-english-task .dw-question h2{margin:0;font-size:clamp(1.4rem,2.5vw,1.95rem);letter-spacing:-.03em}.ac-english-task .dw-options{display:grid;grid-template-columns:1fr;gap:10px;max-width:760px}.ac-english-task .dw-option{display:flex!important;align-items:center!important;width:100%;min-height:54px;padding:14px 16px!important;border:1px solid #d7e1ef!important;border-radius:14px!important;background:#fff!important;color:#10264d!important;font:inherit;font-weight:800!important;text-align:left!important;cursor:pointer;box-shadow:none!important}.ac-english-task .dw-option:hover{border-color:#315cde!important;background:#f7f9ff!important;transform:translateY(-1px)}.ac-english-task .dw-option.selected{border-color:#315cde!important;background:#eef3ff!important}.ac-english-task .dw-audio-grid{display:flex;flex-wrap:wrap;gap:12px}.ac-english-task .dw-flash-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.ac-english-task .dw-flash-card{min-height:110px;padding:16px;border:1px solid #dce5f2;border-radius:16px;background:#f8faff;text-align:left;cursor:pointer}.ac-english-task .dw-flash-card span,.ac-english-task .dw-flash-card strong{display:block}.ac-english-task .dw-flash-card strong{margin-top:8px;color:#315cde}.ac-english-task .dw-lesson-actions{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:16px 24px;border-top:1px solid #e8eef6;background:#fbfcff}.ac-english-task .dw-lesson-actions .r23-btn{min-width:130px}.ac-english-task .dw-feedback{min-height:1.25rem;margin:0;color:#52637a}@media(max-width:700px){.ac-english-task .dw-theory-grid,.ac-english-task .dw-flash-grid{grid-template-columns:1fr}.ac-english-task .dw-lesson-head,.ac-english-task .dw-lesson-body{padding:18px}.ac-english-task .dw-lesson-actions{padding:12px 18px}.ac-english-task .dw-lesson-actions .r23-btn{min-width:0;flex:1}.ac-english-task .dw-lesson-actions>span{display:none}}\n