:root{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#182333;background:#f5f7fa;font-synthesis:none;line-height:1.6}
.level-check-invite{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:28px 30px;background:#eaf0ff;border:1px solid #ccd6fc;border-radius:18px;margin:36px 0}.level-check-invite .eyebrow{color:#263cb3;margin-bottom:6px}.level-check-invite h2{font-size:25px}.level-check-invite p:last-child{margin:8px 0 0;color:#536277;font-size:15px}.check-cta{display:flex;align-items:center;justify-content:center;gap:24px;text-decoration:none;background:#1d3de3;color:#fff;padding:19px 27px;min-height:64px;border-radius:12px;font-size:18px;font-weight:700;white-space:nowrap;box-shadow:0 8px 18px #1d3de31a}.check-cta:hover{background:#1731bd}@media(max-width:720px){.level-check-invite{align-items:stretch;flex-direction:column;padding:24px;gap:20px}.check-cta{white-space:normal}}
    *{box-sizing:border-box}body{margin:0}a{color:inherit}button{font:inherit}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #3477ed;outline-offset:5px}
    .wrap{max-width:1120px;margin:auto;padding:0 28px}header{background:#fff;border-bottom:1px solid #dfe5ed}.top{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:18px;font-weight:750;letter-spacing:-.5px}.mark{display:grid;place-items:center;background:#1d3de3;color:white;width:40px;height:40px;border-radius:12px;font-size:23px}.language{display:flex;gap:4px;border:1px solid #dfe5ed;border-radius:10px;padding:4px}.language button{border:0;border-radius:6px;background:transparent;padding:5px 12px;font-size:14px;cursor:pointer;color:#425066}.language button[aria-pressed=true]{background:#182333;color:#fff}
    main.wrap{padding-top:48px;padding-bottom:64px}main.wrap.section-page{padding-top:20px}.eyebrow{font-size:13px;text-transform:uppercase;letter-spacing:2px;font-weight:750;color:#3f5676;margin:0 0 12px}h1{font-size:clamp(36px,5vw,60px);line-height:1.1;letter-spacing:-2.5px;margin:0 0 18px;max-width:750px}.intro{max-width:640px;color:#536277;font-size:18px;margin-bottom:32px}.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:15px;margin:36px 0 18px}h2{font-size:22px;letter-spacing:-.5px;margin:0}.subtle{color:#59687b;font-size:14px}.levels{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}.level{background:#fff;border:1px solid #dfe5ed;border-radius:14px;padding:19px 16px}.level strong{font-size:30px;letter-spacing:-1px;display:block;margin-bottom:6px}.level span{display:block;font-size:14px;color:#526278}.level small{display:block;margin-top:14px;font-size:12px;color:#68768a}.level.first{border-color:#1d3de3;background:#eef2ff}.level.first strong{color:#1d3de3}
    .sample{margin-top:32px;border:1px solid #dfe5ed;border-radius:18px;background:#fff;overflow:hidden}.sample-top{padding:26px 30px;border-bottom:1px solid #e7ebf1;display:flex;align-items:center;justify-content:space-between;gap:16px}.tag{background:#e8edff;color:#263cb3;padding:5px 11px;border-radius:7px;font-size:13px;font-weight:700;white-space:nowrap}.lesson{display:grid;grid-template-columns:1fr 1fr;gap:35px;padding:30px}.lesson h3{font-size:20px;margin:0 0 10px}.lesson p{margin:0;color:#536277}.sentence{background:#f2f5fa;border-radius:12px;padding:24px;font-size:clamp(20px,3vw,28px);font-weight:600}.sentence mark{background:#dce6ff;color:#173bb7;border-radius:6px;padding:3px 7px}.translation{font-size:15px;color:#536277;margin-top:14px;font-weight:400}details{margin-top:18px;font-size:15px}summary{cursor:pointer;color:#2447c0;font-weight:650}details p{margin-top:10px!important}.notice{font-size:14px;margin:24px 0 0;color:#59687b;max-width:740px}footer{padding:24px 0;border-top:1px solid #dfe5ed;font-size:14px;color:#59687b}.foot{display:flex;justify-content:space-between;gap:15px}[hidden]{display:none!important}
    @media(max-width:800px){.levels{grid-template-columns:repeat(3,1fr)}.lesson{grid-template-columns:1fr;gap:24px}main.wrap{padding-top:34px}main.wrap.section-page{padding-top:14px}h1{letter-spacing:-1.5px}}@media(max-width:480px){.wrap{padding:0 18px}.top{min-height:80px;gap:10px}.brand{font-size:15px;gap:8px}.mark{width:32px;height:32px;font-size:20px}.language button{padding:5px 8px}.levels{grid-template-columns:repeat(2,1fr)}.sample-top,.lesson{padding:22px}.section-head,.foot{align-items:flex-start;flex-direction:column;gap:5px}.intro{font-size:17px}}