@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&family=DM+Serif+Display:ital@0;1&display=swap');
:root{--ink:#173b66;--muted:#576a79;--blue:#2f6fb7;--orange:#e8842a;--yellow:#ffd659;--green:#6c9c78;--paper:#fcf8ee;--earth:#8a5b3d;--line:#e9dfce}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.5 'DM Sans',system-ui,sans-serif}button,input,select{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}.shell{width:min(1180px,calc(100% - 48px));margin-inline:auto}.skip{position:absolute;top:-60px;left:12px;background:white;padding:10px;z-index:20}.skip:focus{top:8px}*:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
.topbar{background:rgba(255,255,255,.78);border-bottom:1px solid var(--line)}.nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:11px}.brand img{object-fit:contain}.brand strong{display:block;font-size:16px;line-height:1.1}.brand small{color:var(--orange);font-size:10px;font-weight:800;letter-spacing:.15em}.nav nav{display:flex;gap:28px;font-size:13px;font-weight:800}.nav nav a:hover{color:var(--orange)}
.hero{min-height:535px;display:grid;grid-template-columns:1fr .9fr;align-items:center;gap:44px;padding-block:76px 86px}.eyebrow{font-weight:800;font-size:11px;letter-spacing:.17em;color:#bb672c}.hero h1{font:clamp(42px,5.3vw,72px)/1.04 'DM Serif Display',Georgia,serif;letter-spacing:-.025em;margin:20px 0}.hero h1 em{font-style:normal;color:#e47d20;box-shadow:inset 0 -.21em #ffe794}.hero p{max-width:575px;color:var(--muted);font-size:17px;margin:0 0 28px}.primary{display:inline-flex;align-items:center;gap:30px;background:var(--ink);color:white;padding:14px 21px;border-radius:11px;font-weight:800;font-size:14px;box-shadow:0 11px 24px #173b6629}.primary:hover{background:#28578b}.hero-art{height:390px;position:relative;border-radius:38% 48% 42% 46%;background:#f6e8c9;overflow:hidden}.sun{position:absolute;width:360px;height:360px;border-radius:50%;background:#ffe082;left:13%;top:8%}.paper{position:absolute;background:#fffdf7;border:2px solid #e3d8c2;box-shadow:0 24px 30px #624c3030;border-radius:11px}.paper-back{width:205px;height:250px;transform:rotate(-14deg);top:72px;left:16%;padding:40px 18px;font:27px 'DM Serif Display',serif;color:var(--blue)}.paper-back small{display:block;font:12px 'DM Sans',sans-serif;color:var(--earth);margin-top:18px}.paper-front{width:240px;height:295px;transform:rotate(10deg);top:52px;left:43%;padding:27px;background:#fdfdf7}.paper-front span{font-size:12px;font-weight:800;letter-spacing:.15em;color:#e28331}.paper-front b{display:block;font:31px/1.11 'DM Serif Display',serif;margin-top:39px}.paper-front i{display:block;font-style:normal;font-size:58px;text-align:center;color:var(--green)}.star{position:absolute;font-size:45px;color:#e58430;right:13%;bottom:31px}
.library{background:#fff;padding:78px 0 95px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section-intro{display:flex;align-items:end;justify-content:space-between;gap:42px}.section-intro h2,.guide h2{font:clamp(33px,4vw,48px)/1.13 'DM Serif Display',Georgia,serif;margin:10px 0 0}.section-intro p{max-width:350px;color:var(--muted);margin:0 0 4px;font-size:14px}.filters{display:grid;grid-template-columns:2fr 1fr 1fr;gap:14px;padding:20px;background:#f8f4e9;border:1px solid var(--line);border-radius:20px;margin-top:31px}.filters label{display:flex;flex-direction:column;gap:6px;font-size:11px;font-weight:800;color:var(--earth);text-transform:uppercase;letter-spacing:.06em}.filters input,.filters select{min-width:0;width:100%;height:48px;border:1px solid #dbd6cd;border-radius:10px;background:white;color:var(--ink);padding:0 13px;font-size:14px;letter-spacing:0;text-transform:none}.filters input::placeholder{color:#86909b}.results{display:flex;justify-content:space-between;align-items:center;min-height:50px;margin-top:15px}.results p{margin:0;color:var(--muted);font-size:13px;font-weight:700}.results button,.empty button{border:0;background:transparent;color:var(--blue);font-size:13px;font-weight:800;text-decoration:underline}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px}.card{min-width:0;display:flex;flex-direction:column;border:1px solid #e5e5df;border-radius:17px;overflow:hidden;background:#fff;box-shadow:0 8px 25px #173b660c}.card[hidden]{display:none}.cover{display:block;position:relative;width:100%;height:210px;border:0;padding:0;overflow:hidden;background:#e8eddf}.cover img{width:100%;height:100%;object-fit:cover;object-position:top center;transition:transform .3s}.cover:hover img{transform:scale(1.035)}.cover span{position:absolute;bottom:12px;right:12px;border-radius:8px;background:#173b66ec;color:white;padding:8px 10px;font-size:11px;font-weight:800}.card-body{display:flex;flex:1;flex-direction:column;padding:18px}.tags{display:flex;gap:7px;flex-wrap:wrap}.tags span{background:#edf3f7;color:var(--blue);padding:4px 8px;border-radius:20px;font-size:10px;font-weight:800}.tags span+span{background:#f9efdd;color:#9c622f}.card h3{font:23px/1.16 'DM Serif Display',Georgia,serif;margin:14px 0 8px}.card p{color:var(--muted);font-size:13px;margin:0 0 17px}.card-foot{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:auto;padding-top:13px;border-top:1px solid #eee}.card-foot small{color:var(--earth);font-size:11px;font-weight:700}.card-foot button{border:0;background:transparent;color:var(--blue);font-size:12px;font-weight:800;white-space:nowrap}.card-foot button:hover{text-decoration:underline}.empty{text-align:center;padding:55px;border:1px dashed var(--line);border-radius:15px}.empty p{color:var(--muted)}
.guide{display:grid;grid-template-columns:.9fr 1.1fr;gap:90px;padding-block:86px 92px}.guide>div>p{max-width:430px;color:var(--muted);font-size:14px;margin-top:16px}.guide ol{list-style:none;margin:0;padding:0}.guide li{display:flex;gap:18px;border-bottom:1px solid var(--line);padding:17px 0}.guide li:first-child{padding-top:0}.guide li span{font:25px 'DM Serif Display',serif;color:var(--orange)}.guide li b{font-size:15px}.guide li p{margin:4px 0 0;color:var(--muted);font-size:13px}footer{background:var(--ink);color:white;padding:25px 0}footer .shell{display:flex;justify-content:space-between;gap:18px;align-items:center}footer span{font-size:11px;letter-spacing:.1em;color:#d2e1ed}
dialog{width:min(1100px,calc(100% - 24px));height:min(94dvh,1100px);max-width:none;max-height:none;border:0;border-radius:18px;padding:0;box-shadow:0 24px 80px #00172c88;overflow:hidden;background:#f5f1e9}dialog::backdrop{background:#0b213bbd}.reader-head{display:flex;align-items:center;justify-content:space-between;padding:15px 22px;background:var(--ink);color:white;gap:15px}.reader-head small{font-size:11px;color:#d6dfec}.reader-head h2{font:22px 'DM Serif Display',Georgia,serif;margin:2px 0}.reader-head button{border:0;background:#ffffff21;color:white;border-radius:50%;width:38px;height:38px;flex:none}.reader-toolbar{display:flex;align-items:center;gap:8px;padding:10px 16px;background:white;border-bottom:1px solid var(--line)}.reader-toolbar button{border:1px solid #d5dce1;border-radius:8px;background:#fff;color:var(--ink);font-size:12px;font-weight:700;padding:8px 10px}.reader-toolbar button:hover:not(:disabled){background:#eef5fa}.reader-toolbar button:disabled{opacity:.4;cursor:default}#page-status{font-size:12px;font-weight:800;margin:auto;white-space:nowrap}.page-scroll{height:calc(100% - 162px);overflow:auto;text-align:center;padding:16px;background:#e7e9e8}.page-scroll img{display:block;width:min(100%,860px);height:auto;margin:auto;box-shadow:0 4px 16px #0003;background:white}.page-scroll.zoomed img{width:1400px;max-width:none}.reader-hint{margin:0;padding:8px;text-align:center;color:var(--muted);font-size:11px;background:#fff}body.reader-open{overflow:hidden}
@media(max-width:900px){.hero{grid-template-columns:1fr .75fr;gap:15px}.hero-art{height:330px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.guide{gap:40px}}
@media(max-width:650px){.shell{width:min(100% - 30px,560px)}.nav{min-height:67px}.brand strong{font-size:13px}.brand small{font-size:9px}.brand img{width:36px;height:36px}.nav nav{gap:12px;font-size:11px}.nav nav a:last-child{display:none}.hero{display:flex;flex-direction:column;align-items:stretch;min-height:0;padding-block:44px 55px}.hero h1{font-size:clamp(38px,10vw,54px)}.hero p{font-size:14px}.hero-art{height:230px;margin-top:32px;border-radius:45%}.sun{width:250px;height:250px;left:23%;top:1%}.paper-back{width:135px;height:175px;top:35px;left:19%;font-size:18px;padding:20px 12px}.paper-back small{font-size:8px}.paper-front{width:155px;height:190px;top:20px;left:48%;padding:17px}.paper-front span{font-size:8px}.paper-front b{font-size:19px;margin-top:27px}.paper-front i{font-size:34px}.star{font-size:24px}.library{padding:55px 0 65px}.section-intro{display:block}.section-intro p{margin-top:13px}.filters{grid-template-columns:1fr 1fr;gap:10px;padding:13px;margin-top:24px}.search-label{grid-column:1/-1}.filters input,.filters select{font-size:13px;height:45px;padding:0 8px}.grid{grid-template-columns:1fr;gap:16px}.card{display:grid;grid-template-columns:112px 1fr;min-height:165px}.cover{height:100%;min-height:165px}.cover span{display:none}.card-body{padding:12px}.card h3{font-size:18px;margin:8px 0 5px}.card p{font-size:11px;line-height:1.35;margin-bottom:10px}.card-foot{padding-top:8px}.card-foot small{font-size:9px}.card-foot button{font-size:11px}.tags span{font-size:9px;padding:3px 6px}.guide{display:block;padding-block:60px}.guide ol{margin-top:28px}footer .shell{display:block}footer span{display:block;margin-top:7px;font-size:9px}dialog{width:100%;height:100dvh;border-radius:0}.reader-head{padding:12px}.reader-head h2{font-size:18px}.reader-toolbar{flex-wrap:wrap;padding:8px}.reader-toolbar button{font-size:11px;padding:7px}.reader-toolbar #zoom{margin-left:auto}.page-scroll{height:calc(100% - 165px);padding:8px}.page-scroll.zoomed img{width:1000px}.reader-hint{font-size:10px}}
/* Clear path from subject to level to materials. */
[hidden]{display:none!important}
.portal{padding:60px 0 80px}.portal-head{max-width:760px}.portal h1{font:clamp(2.5rem,6vw,4.8rem)/1.08 'DM Serif Display',Georgia,serif;margin:12px 0 14px}.portal-head p{font-size:1.1rem;color:var(--muted);margin:0 0 34px}.track-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}.track{grid-column:span 2;min-height:210px;text-align:left;display:flex;flex-direction:column;align-items:flex-start;border:1px solid #d7e2e7;border-radius:22px;background:#fff;padding:23px;color:var(--ink);box-shadow:0 12px 28px #173b6613;transition:transform .2s,box-shadow .2s}.track:hover{transform:translateY(-3px);box-shadow:0 16px 32px #173b6624}.track-basic,.track-advanced{grid-column:span 3;min-height:230px}.track-basic{background:#eaf5fc}.track-advanced{background:#fff1d4}.track-korean{background:#eef7f2}.track-chinese{background:#fdf0e8}.track-spanish{background:#edf2fd}.track-icon{display:grid;place-items:center;min-width:58px;height:58px;padding:0 10px;border-radius:15px;background:#fff;font-size:1.35rem;font-weight:900;color:var(--blue)}.track strong{font-size:1.35rem;margin-top:16px;line-height:1.22}.track small{font-size:.93rem;color:var(--muted);margin-top:7px}.track b{font-size:.9rem;color:var(--blue);margin-top:auto;padding-top:17px}.level-picker{margin-top:46px;padding:28px;border-radius:24px;background:#fff;border:1px solid var(--line);box-shadow:0 10px 25px #173b660e}.level-picker h2{font:clamp(2rem,4vw,3rem)/1.12 'DM Serif Display',Georgia,serif;margin:12px 0 6px}.level-picker p{color:var(--muted);margin:0 0 22px}.back{border:0;background:transparent;color:var(--blue);font-weight:800;font-size:.95rem;padding:8px 0}.level-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.level-card{border:2px solid #d3e2e8;background:#f3f9fb;color:var(--ink);border-radius:15px;min-height:94px;font-size:1.25rem;font-weight:900;padding:15px}.level-card:hover,.level-card:focus-visible{background:#dff0f8;border-color:var(--blue)}.extra-levels{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-top:24px}.extra-levels span{color:var(--muted);font-weight:700}.extra-levels .level-card{min-height:42px;font-size:.95rem;padding:8px 14px}.library{padding-top:48px}.library .back{margin-bottom:13px}.filters{grid-template-columns:1fr}.filters label:not(.search-label){display:none}.filters label{font-size:.9rem}.filters input{font-size:1rem}.results p{font-size:.92rem}.card h3{font-size:1.35rem}.card p{font-size:.9rem}.card-foot small,.card-foot button{font-size:.82rem}
@media(max-width:760px){.portal{padding:37px 0 46px}.track-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.track-basic,.track-advanced{grid-column:span 2;min-height:175px}.track:not(.track-basic):not(.track-advanced){grid-column:span 1}.track{min-height:175px;padding:17px}.track strong{font-size:1.05rem}.track small{font-size:.82rem}.track-icon{height:45px;min-width:45px;font-size:1.05rem}.level-picker{padding:20px}.level-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.level-card{min-height:77px}}
@media(max-width:390px){.track-grid{grid-template-columns:1fr}.track{grid-column:1/-1!important;min-height:145px}.level-grid{gap:9px}}