:root{--paper:#f8f6f0;--white:#fffefa;--ink:#18304a;--muted:#68798a;--blue:#315b80;--blue-dark:#244768;--blue-pale:#e9f1f5;--red:#bd6257;--red-pale:#f7eae5;--line:#e3e2dc;--green:#356b55;--shadow:0 14px 36px #18304a12;--serif:Georgia,"Times New Roman",serif;--sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);font-family:var(--sans);margin:0;font-size:16px;line-height:1.65}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible{outline-offset:3px;outline:3px solid #d78270}::selection{background:#dce8ed}.skip-link{background:var(--ink);color:#fff;z-index:10;padding:8px 14px;position:absolute;top:8px;left:-999px}.skip-link:focus{left:8px}.site-header{z-index:5;backdrop-filter:blur(12px);background:#f8f6f0ed;border-bottom:1px solid #18304a14;justify-content:space-between;align-items:center;height:76px;padding:0 max(28px,50% - 580px);display:flex;position:sticky;top:0}.brand{letter-spacing:-.03em;align-items:center;gap:11px;font-size:17px;font-weight:700;display:flex}.brand em{font-family:var(--serif);font-size:18px;font-weight:500}.brand-mark{background:var(--blue);color:#fff;width:34px;height:34px;font:600 11px var(--serif);letter-spacing:-.03em;border-radius:50% 50% 45% 45%;place-items:center;display:grid}.site-nav{align-items:center;gap:28px;display:flex}.site-nav a{color:#536a7e;padding:8px 0;font-size:14px}.site-nav a:hover,.site-nav a.current{color:var(--ink)}.site-nav a.current{font-weight:700}.site-nav a:last-child{background:var(--blue);color:#fff;border-radius:999px;padding:10px 17px}.menu-toggle{display:none}.page-shell{width:min(1100px,100% - 48px);margin:auto}.narrow{max-width:800px}.breadcrumb{color:var(--muted);align-items:center;gap:9px;margin:27px 0 14px;font-size:13px;display:flex}.breadcrumb a:hover{color:var(--blue)}.eyebrow{color:var(--red);letter-spacing:.16em;text-transform:uppercase;font-size:11px;font-weight:700}.display-title,h1,h2,h3{font-family:var(--serif);letter-spacing:-.035em;margin:0;line-height:1.13}.display-title{font-size:clamp(43px,6vw,68px);font-weight:500}.display-title span{color:var(--blue);font-style:italic}.page-title{font-size:clamp(37px,5vw,54px);font-weight:500}.lead{color:#52687b;max-width:600px;font-size:18px}.button{cursor:pointer;border:0;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:13px 19px;font-size:14px;font-weight:700;transition:transform .18s,background .18s;display:inline-flex}.button:hover{transform:translateY(-2px)}.button-primary{background:var(--blue);color:#fff}.button-primary:hover{background:var(--blue-dark)}.button-secondary{background:var(--white);color:var(--ink);border:1px solid var(--line)}.text-link{color:var(--blue);font-size:14px;font-weight:700}.hero{grid-template-columns:1.1fr .9fr;align-items:center;gap:38px;width:calc(100% - 48px);max-width:1160px;min-height:440px;margin:40px auto 0;display:grid}.hero-copy{padding:30px 0}.hero-copy .lead{margin:23px 0 27px}.hero-actions{flex-wrap:wrap;gap:12px;display:flex}.hero-art{background:#e9eff0;border-radius:14px;place-items:center;min-height:370px;display:grid;position:relative;overflow:hidden}.hero-art:before,.hero-art:after{content:"";border:1px solid #315b802b;border-radius:50%;width:320px;height:320px;position:absolute}.hero-art:after{width:245px;height:245px}.sun{background:#e6c99f;border-radius:50%;width:64px;height:64px;position:absolute;top:17%;right:22%}.book{z-index:1;background:#fffefa;border:1px solid #d8d8d1;border-radius:5px 12px 12px 5px;width:210px;height:260px;padding:25px 24px;position:relative;transform:rotate(-5deg);box-shadow:12px 16px #315b8021}.book:before{content:"";border-left:1px solid #edb4a9;height:100%;position:absolute;top:0;left:16px}.book-title{font:600 27px/1.1 var(--serif);color:var(--blue);margin:23px 0 10px}.book small{letter-spacing:.16em;color:var(--red);font-size:10px}.book-line{background:#d9e1e3;height:1px;margin-top:16px}.float-note{z-index:2;box-shadow:var(--shadow);color:var(--blue);font:italic 17px var(--serif);background:#fffefa;border-radius:6px;padding:11px 15px;position:absolute}.note-one{top:24%;left:8%;transform:rotate(-5deg)}.note-two{bottom:22%;right:8%;transform:rotate(4deg)}.hero-stamp{color:#6b8295;font:italic 13px var(--serif);position:absolute;bottom:30px;left:32px}.section-band{background:#f0eee7;margin-top:70px;padding:65px 0 72px}.section-heading{justify-content:space-between;align-items:end;gap:20px;margin-bottom:27px;display:flex}.section-heading h2{font-size:36px;font-weight:500}.section-heading p{color:var(--muted);margin:7px 0 0}.section-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.section-card{background:var(--white);border:1px solid var(--line);border-radius:10px;min-height:190px;padding:24px;transition:transform .2s,box-shadow .2s}.section-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}.section-card .section-number{color:var(--red);letter-spacing:.08em;font-size:12px;font-weight:700}.section-card h3{margin:12px 0 8px;font-size:26px;font-weight:500}.section-card p{color:var(--muted);margin:0 0 15px;font-size:14px}.section-card span:last-child{color:var(--blue);font-size:12px;font-weight:700}.daily-banner{background:#e8eef0;border-radius:12px;grid-template-columns:1fr auto;align-items:center;gap:24px;width:calc(100% - 48px);max-width:1100px;margin:72px auto;padding:34px 40px;display:grid}.daily-banner h2{margin:7px 0;font-size:30px;font-weight:500}.daily-banner p{color:#5b7082;margin:0}.steps{width:calc(100% - 48px);max-width:1100px;margin:0 auto 84px}.steps h2{margin-bottom:24px;font-size:32px;font-weight:500}.step-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.step{border-top:1px solid #c9d0d1;padding-top:14px}.step b{color:var(--red);letter-spacing:.1em;font-size:12px}.step h3{font:700 16px var(--sans);margin:7px 0}.step p{color:var(--muted);margin:0;font-size:14px}.site-footer{border-top:1px solid var(--line);color:var(--muted);padding:38px max(28px,50% - 550px) 28px;font-size:13px}.footer-brand{color:var(--ink);font-size:15px}.footer-brand em{font-size:16px}.site-footer p{margin:7px 0 14px}.site-footer div{gap:20px;margin-bottom:22px;display:flex}.site-footer a:hover{color:var(--blue)}.site-footer small{font-size:11px}.topic-list{gap:8px;margin:28px 0 70px;display:grid}.topic-card{background:var(--white);border:1px solid var(--line);border-radius:8px;align-items:center;gap:18px;padding:16px 18px;transition:border .2s,transform .2s;display:flex}.topic-card:hover{border-color:#9db5c4;transform:translate(3px)}.topic-index{font:500 18px var(--serif);color:#9aabae;width:38px}.topic-card-copy{flex:1;gap:2px;display:grid}.topic-card-copy strong{font-size:16px}.topic-card-copy small{color:var(--muted);font-size:13px}.card-arrow{color:var(--blue);font-size:20px}.count-pill{background:var(--blue-pale);color:var(--blue);border-radius:99px;align-items:center;gap:7px;margin-top:14px;padding:6px 11px;font-size:12px;font-weight:700;display:inline-flex}.class-grid{grid-template-columns:repeat(3,1fr);gap:16px;margin:36px 0 76px;display:grid}.lesson-head{padding:10px 0 30px}.lesson-grid{grid-template-columns:minmax(0,1fr) 260px;align-items:start;gap:52px;display:grid}.lesson-content{max-width:730px}.lesson-objective{border-left:3px solid var(--red);background:var(--red-pale);color:#534e4c;margin:20px 0 32px;padding:13px 18px}.lesson-content h2{margin:36px 0 14px;font-size:28px;font-weight:500}.lesson-content p,.lesson-content li{color:#536779}.lesson-content ul{padding-left:22px}.example-list{gap:10px;display:grid}.example-row{background:var(--white);border:1px solid var(--line);border-radius:7px;grid-template-columns:1fr 1fr;gap:15px;padding:14px 17px;display:grid}.example-row span:first-child{color:var(--blue);font-weight:700}.example-row span:last-child{color:var(--muted)}.vocab-grid{grid-template-columns:repeat(2,1fr);gap:8px;display:grid}.vocab-item{background:var(--white);border:1px solid var(--line);border-radius:6px;padding:10px 13px}.vocab-item b{color:var(--blue)}.vocab-item span{color:var(--muted);font-size:13px;display:block}.lesson-aside{background:#eeeee8;border-radius:9px;padding:20px;position:sticky;top:100px}.lesson-aside h3{margin-bottom:8px;font-size:20px;font-weight:500}.lesson-aside p{color:var(--muted);font-size:13px}.lesson-aside .button{width:100%;margin-top:8px}.lesson-nav{border-top:1px solid var(--line);justify-content:space-between;gap:12px;margin:42px 0 70px;padding-top:20px;display:flex}.lesson-nav a{color:var(--blue);font-size:13px;font-weight:700}.draft-note{color:var(--muted);background:#f1efe9;border-radius:6px;margin-top:16px;padding:10px 12px;font-size:12px}.search-box{gap:10px;margin:26px 0 16px;display:flex}.search-box input{background:var(--white);min-width:0;color:var(--ink);border:1px solid #cbd4d7;border-radius:8px;flex:1;padding:13px 15px}.search-hint,.search-status{color:var(--muted);font-size:13px}.result-group{margin:25px 0}.result-group h2{margin-bottom:9px;font-size:22px;font-weight:500}.search-results{padding-bottom:50px}.quiz-panel{background:var(--white);border:1px solid var(--line);max-width:760px;box-shadow:var(--shadow);border-radius:12px;margin:26px 0 70px;padding:28px}.quiz-head{justify-content:space-between;align-items:start;gap:18px;display:flex}.quiz-head h2{margin-top:6px;font-size:27px;font-weight:500}.quiz-clock{color:var(--muted);white-space:nowrap;font-size:12px}.quiz-progress-wrap{align-items:center;gap:15px;margin:24px 0;display:flex}.quiz-progress{background:#e6e8e4;border-radius:9px;flex:1;height:5px;overflow:hidden}.quiz-progress span{background:var(--blue);width:0;height:100%;transition:width .2s;display:block}.quiz-progress-wrap p{color:var(--muted);margin:0;font-size:12px}.question-title{font:500 22px/1.35 var(--serif);margin:19px 0}.answer-label{margin-bottom:6px;font-size:13px;font-weight:700;display:block}.answer-input{width:100%;color:var(--ink);background:#fffefa;border:1px solid #c4d0d4;border-radius:7px;padding:13px 14px}.quiz-actions{gap:10px;margin-top:17px;display:flex}.quiz-feedback{min-height:26px;margin:13px 0 0;font-size:14px}.feedback-good{color:#285f4a}.feedback-review{color:#914b43}.feedback-note{color:var(--blue)}.quiz-results{background:#edf3f2;border-radius:8px;margin-top:20px;padding:23px}.quiz-results h3{margin:7px 0;font-size:30px}.quiz-results p{color:var(--muted)}.result-links{flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;display:flex}.not-found{text-align:center;padding:90px 20px 120px}.not-found h1{font-size:66px}.not-found p{color:var(--muted)}.not-found .button{margin:8px}@media (width<=760px){.site-header{height:66px;padding:0 20px}.menu-toggle{border:1px solid var(--line);background:var(--white);color:var(--ink);border-radius:6px;padding:7px 11px;font-size:13px;display:block}.site-nav{background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:5px;padding:12px 20px 18px;display:none;position:absolute;top:65px;left:0;right:0}.site-nav.open{display:flex}.site-nav a{padding:10px 5px}.site-nav a:last-child{text-align:center}.hero{grid-template-columns:1fr;gap:20px;margin-top:14px}.hero-copy{padding:22px 0 0}.hero-art{min-height:300px}.display-title{font-size:49px}.section-band{margin-top:48px;padding:45px 0}.section-grid,.class-grid{grid-template-columns:1fr}.section-card{min-height:0}.section-heading{flex-direction:column;align-items:start}.daily-banner{grid-template-columns:1fr;margin-top:48px;margin-bottom:55px;padding:25px}.steps{margin-bottom:55px}.step-grid{grid-template-columns:1fr;gap:17px}.page-shell{width:calc(100% - 36px)}.lesson-grid{grid-template-columns:1fr;gap:10px}.lesson-aside{order:-1;position:static}.lesson-aside p{margin-bottom:6px}.lesson-aside .button{width:auto}.lesson-content h2{margin-top:28px}.example-row{grid-template-columns:1fr;gap:2px}.vocab-grid{grid-template-columns:1fr 1fr}.quiz-panel{padding:19px}.quiz-head{display:block}.quiz-clock{margin-top:7px;display:block}.site-footer{padding:30px 20px 22px}.site-footer div{flex-wrap:wrap;gap:12px 18px}.lesson-nav,.search-box{flex-direction:column}.search-box .button{width:100%}}@media (width<=380px){.page-shell,.hero,.daily-banner,.steps{width:calc(100% - 30px)}.brand{font-size:15px}.brand em{font-size:16px}.hero-art{min-height:260px}.book{transform:scale(.88)rotate(-5deg)}.note-one{top:19%;left:4%}.note-two{bottom:14%;right:4%}.topic-card{gap:10px;padding:13px 12px}.topic-card-copy strong{font-size:14px}.topic-card-copy small{font-size:12px}.quiz-progress-wrap{flex-direction:column;align-items:start;gap:5px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important}}.answer-options{border:0;margin:8px 0;padding:0}.answer-options legend{margin-bottom:8px;font-size:13px;font-weight:700}.answer-option{border:1px solid var(--line);background:var(--white);cursor:pointer;border-radius:7px;align-items:center;gap:10px;margin:7px 0;padding:11px 13px;display:flex}.answer-option:has(input:checked){border-color:var(--blue);background:var(--blue-pale)}.answer-option input{accent-color:var(--blue);width:17px;height:17px}.matching-list{gap:8px;display:grid}.matching-row{grid-template-columns:1fr 1fr;align-items:center;gap:12px;display:grid}.matching-row strong{color:var(--blue);font-size:14px}.matching-row select{padding:10px 12px}