:root{--ink:#17211d;--muted:#66716c;--line:#e2e8e4;--paper:#f5f7f5;--panel:#fff;--brand:#0f766e;--brand-dark:#0b5f59;--brand-soft:#e7f5f2;--blue-soft:#eef4ff;--gold-soft:#fff6df;--radius-sm:12px;--radius:18px;--radius-lg:24px;--shadow:0 14px 40px #1d342c14}*{box-sizing:border-box}html{background:var(--paper);color:var(--ink);scroll-behavior:smooth}body{background:radial-gradient(circle at 8% 0%, #0f766e0f, transparent 30%), var(--paper);min-height:100vh;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.55}a{color:inherit}.site-header-wrap{z-index:20;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#ffffffeb;border-bottom:1px solid #e2e8e4e6;position:sticky;top:0}.site-header{grid-template-columns:auto 1fr auto;align-items:center;gap:36px;width:min(1180px,100% - 32px);min-height:72px;margin:0 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0;font-size:1.08rem}.hero-actions{align-items:center;gap:18px;margin-top:28px;display:flex}.button{border-radius:12px;justify-content:center;align-items:center;min-height:46px;padding:0 18px;font-weight:760;text-decoration:none;transition:transform .16s,background .16s,box-shadow .16s;display:inline-flex}.button:hover{transform:translateY(-1px)}.button.primary{color:#fff;background:var(--brand);box-shadow:0 10px 22px #0f766e2e}.button.primary:hover{background:var(--brand-dark)}.button.secondary{border:1px solid var(--line);background:#fff}.button.full{width:100%}.text-link{color:var(--brand-dark);font-weight:720;text-decoration:none}.text-link:hover{text-decoration:underline}.hero-proof{color:var(--muted);border-top:1px solid #0f766e24;gap:26px;margin-top:36px;padding-top:24px;font-size:.88rem;display:flex}.hero-proof span{align-items:baseline;gap:5px;display:flex}.hero-proof strong{color:var(--ink);font-size:1.08rem}.today-card{border:1px solid 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SC,sans-serif;font-size:2.15rem;font-weight:760;display:grid}.lesson-preview span{color:var(--muted);font-size:.78rem}.lesson-preview h3{margin:4px 0 6px;font-size:1.5rem}.lesson-preview p{color:var(--muted);margin:0;font-size:.92rem}.lesson-meta{color:var(--muted);flex-wrap:wrap;gap:8px 16px;font-size:.8rem;display:flex}.progress-track{background:#edf1ef;border-radius:99px;height:7px;margin:20px 0;overflow:hidden}.progress-track span{border-radius:inherit;background:var(--brand);height:100%;display:block}.dashboard-section{gap:18px;display:grid}.section-heading h2{font-size:1.55rem}.study-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.study-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);grid-template-columns:48px 1fr auto;align-items:center;gap:14px;min-height:104px;padding:18px;text-decoration:none;transition:transform .16s,border-color .16s,box-shadow 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32px);color:var(--muted);border-top:1px solid var(--line);margin:0 auto 24px;padding-top:22px;font-size:.82rem}@media (max-width:920px){.dashboard-hero{grid-template-columns:1fr}.hero-copy-block{padding:40px}.study-grid,.course-panel{grid-template-columns:1fr}.desktop-nav{gap:0}.desktop-nav a{padding-inline:9px}}@media (max-width:720px){body{padding-bottom:76px}.site-header{grid-template-columns:1fr auto;min-height:64px}.desktop-nav{display:none}.header-cta{padding:9px 12px;font-size:.78rem}.brand-copy small{display:none}.mobile-nav{z-index:30;border:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#fffffff5;border-radius:18px;grid-template-columns:repeat(4,1fr);min-height:62px;padding:7px 10px;display:grid;position:fixed;bottom:10px;left:10px;right:10px;box-shadow:0 14px 38px #1d342c29}.mobile-nav a{color:var(--muted);align-content:center;justify-items:center;gap:2px;text-decoration:none;display:grid}.mobile-nav a>span{font-family:Noto Sans SC,sans-serif;font-weight:800}.mobile-nav small{font-size:.64rem}.page-shell{padding-top:30px}.hero-copy-block{padding:30px 24px}.hero-copy-block h1{font-size:clamp(2.15rem,11vw,3rem)}.hero-actions{flex-direction:column;align-items:flex-start}.hero-proof{flex-wrap:wrap;gap:12px 20px}.today-card{padding:22px}.lesson-preview{grid-template-columns:62px 1fr}.lesson-symbol{border-radius:17px;width:62px;height:62px;font-size:1.8rem}.section-heading,.course-summary{align-items:flex-start}.learning-heading{flex-direction:column;align-items:flex-start}.course-progress-box{text-align:left;width:100%}.continue-lesson-card{grid-template-columns:1fr}.continue-action{justify-items:stretch}.continue-action .lesson-symbol{display:none}.curriculum-list li{grid-template-columns:42px 1fr auto}.unit-status{grid-column:2;width:fit-content}.curriculum-list a,.unit-lock{grid-area:1/3/span 2}.unit-copy small{white-space:normal}.feature-grid,.level-grid,.stat-row{grid-template-columns:1fr}.continue-card{flex-direction:column;align-items:stretch}footer{margin-bottom:94px}}@media (max-width:460px){.site-header{width:min(100% - 22px,1180px)}.brand-mark{width:36px;height:36px}.header-cta{display:none}.site-header{grid-template-columns:1fr}.page-shell{width:min(100% - 22px,1180px)}.hero-copy-block{padding:26px 20px}.today-card{padding:20px}.hero-proof{grid-template-columns:repeat(2,1fr);display:grid}.study-card{grid-template-columns:44px 1fr auto}.course-panel{padding:20px}.course-summary{display:grid}.mini-unit-list li{grid-template-columns:38px 1fr}.mini-unit-list li>a,.mini-unit-list li>em{grid-column:2}}
.lesson-flow{gap:18px;display:grid}.lesson-summary{justify-content:space-between;align-items:center;gap:24px;display:flex}.lesson-summary h2{margin:0;font-size:clamp(1.8rem,4vw,2.6rem)}.lesson-summary p:last-child{color:var(--muted);margin:8px 0 0}.completion-badge{border:1px solid var(--line);color:var(--muted);border-radius:999px;flex:none;padding:8px 12px;font-size:.85rem;font-weight:800}.completion-badge.is-complete{color:var(--brand-dark);background:var(--brand-soft);border-color:#9bd9c9}.vocabulary-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;display:grid}.vocabulary-card{border:1px solid var(--line);background:#fbfdfc;border-radius:16px;min-height:142px;padding:18px}.vocabulary-card strong{font-family:Noto Sans SC,sans-serif;font-size:2rem;line-height:1.2;display:block}.vocabulary-card span{color:var(--brand);font-weight:700}.vocabulary-card p{color:var(--muted);margin:10px 0 0}.grammar-stack{gap:14px;display:grid}.grammar-stack>article{border:1px solid var(--line);border-radius:16px;padding:20px}.grammar-stack h3{margin:0 0 8px}.grammar-stack code{background:var(--brand-soft);color:var(--brand-dark);border-radius:8px;padding:6px 9px;font-weight:750;display:inline-block}.example-line{border-top:1px solid var(--line);gap:2px;margin-top:12px;padding-top:12px;display:grid}.example-line span,.example-line small{color:var(--muted)}.dialogue-stack{gap:10px;display:grid}.dialogue-stack article{background:#f7faf8;border-radius:16px;padding:16px 18px}.dialogue-stack article:nth-child(2n){background:var(--brand-soft);margin-left:48px}.dialogue-stack article>span{color:var(--brand);text-transform:uppercase;letter-spacing:.08em;font-size:.8rem;font-weight:800;display:block}.dialogue-stack strong{margin-top:5px;font-size:1.2rem;display:block}.dialogue-stack p,.dialogue-stack small{color:var(--muted);margin:3px 0 0}.audio-button{border:1px solid var(--line);background:#fff;border-radius:12px;min-height:40px;padding:0 14px;font-weight:700}.audio-button:disabled{cursor:not-allowed;color:var(--muted);background:#f1f4f2}.quiz-stack{gap:22px;display:grid}.quiz-stack fieldset{border:0;margin:0;padding:0}.quiz-stack legend{margin-bottom:10px;font-weight:800}.quiz-choice{border:1px solid var(--line);cursor:pointer;border-radius:12px;align-items:center;gap:10px;min-height:48px;margin-top:8px;padding:10px 14px;display:flex}.quiz-choice:focus-within{border-color:var(--brand);outline:3px solid #087c6833}.quiz-choice.is-correct{background:#e9f7f2;border-color:#4cae8d}.quiz-choice.is-wrong{background:#fff0ee;border-color:#cf6a62}.quiz-explanation{color:var(--muted);margin:10px 0 0}.lesson-action{cursor:pointer;border:0;margin-top:22px}.lesson-action:disabled{cursor:not-allowed;opacity:.5}.result-panel{background:var(--brand-soft);border-radius:14px;align-items:center;gap:14px;margin-top:22px;padding:18px;display:flex}.result-panel strong{font-size:1.5rem}.complete-button{cursor:pointer;border:0;width:100%}.unit-list li.is-draft{opacity:.78}.unit-list li.is-available{box-shadow:var(--shadow);border-color:#9bd9c9}@media (max-width:760px){.lesson-summary{flex-direction:column;align-items:flex-start}.vocabulary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.dialogue-stack article:nth-child(2n){margin-left:18px}.section-heading{flex-direction:column;align-items:flex-start;gap:12px}}@media (max-width:420px){.vocabulary-grid{grid-template-columns:1fr}}