:root{--ink:#18211d;--muted:#68716c;--paper:#f4f6f2;--white:#fff;--line:#d8ded8;--green:#1f6f54;--yellow:#f2c94c;--red:#b8403b;--blue:#3157d5;--shadow:0 18px 50px rgba(23,33,29,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.65 Manrope,Arial,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.topbar{height:70px;background:var(--ink);color:#fff;display:flex;align-items:center;padding:0 max(24px,calc((100vw - 1180px)/2));gap:46px;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.04em}.brand-mark{display:grid;place-items:center;width:34px;height:34px;background:var(--yellow);color:var(--ink);font-size:12px;letter-spacing:-.05em}.topbar nav{display:flex;gap:28px;flex:1}.topbar nav a{color:#bdc6c1;font-size:13px;font-weight:700}.topbar nav a:hover{color:#fff}.account{display:flex;gap:16px;align-items:center;font-size:12px}.account form{margin:0}.link-button{background:none;border:0;color:#bdc6c1;padding:0;cursor:pointer}.shell{max-width:1180px;margin:0 auto;padding:56px 24px 90px}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:11px;font-weight:800;color:var(--muted);margin:0 0 10px}.hero{display:grid;grid-template-columns:1fr auto;gap:50px;border-bottom:1px solid var(--line);padding-bottom:42px;align-items:end}.hero h1,.course-head h1,.page-head h1{font-size:clamp(34px,5vw,64px);line-height:1.04;letter-spacing:-.055em;margin:0 0 16px;max-width:840px}.hero p,.course-head p,.page-head p{font-size:17px;color:var(--muted);max-width:720px;margin:0}.overall{border-left:5px solid var(--yellow);padding:8px 0 8px 22px;display:flex;flex-direction:column}.overall strong{font-size:42px;line-height:1}.overall strong span{color:var(--muted);font-size:22px}.overall small{margin-top:8px;color:var(--muted)}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:32px}.course-card{background:var(--white);border-top:6px solid var(--accent);padding:26px;min-height:365px;display:flex;flex-direction:column;box-shadow:0 1px 0 var(--line);transition:transform .2s,box-shadow .2s}.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.course-number{font-size:56px;line-height:1;font-weight:800;color:#e4e8e4;letter-spacing:-.08em;margin-bottom:32px}.course-card h2{font-size:25px;line-height:1.15;letter-spacing:-.04em;margin:0 0 14px}.course-card>p:not(.eyebrow){color:var(--muted);margin:0 0 28px}.progress{height:6px;background:#e3e7e3;overflow:hidden;margin-top:auto}.progress i{display:block;height:100%;background:var(--accent,var(--green))}.course-card footer{display:flex;justify-content:space-between;margin-top:12px}.course-card footer b{font-size:19px}.course-card footer span{font-size:12px;color:var(--muted)}.method{display:grid;grid-template-columns:150px 1fr;gap:30px;border:1px solid var(--line);padding:22px;margin-top:28px;background:#eef1ed}.method span{color:var(--muted)}.back{display:inline-block;font-weight:700;font-size:12px;margin-bottom:30px;color:var(--muted)}.course-head{background:var(--ink);color:#fff;border-left:9px solid var(--accent);padding:45px;display:grid;grid-template-columns:1fr auto;align-items:end;gap:40px}.course-head p{color:#bac3be}.course-head .eyebrow{color:#99aaa1}.course-score{display:flex;flex-direction:column;align-items:flex-end}.course-score strong{font-size:54px}.course-score span{color:#bac3be;font-size:12px}.route{margin:40px auto 0;max-width:920px}.route-item{display:grid;grid-template-columns:52px 1fr 30px;gap:22px;padding:23px 0;border-bottom:1px solid var(--line);align-items:center}.route-item:hover h2{color:var(--green)}.node{width:42px;height:42px;display:grid;place-items:center;border:2px solid #b9c1bc;border-radius:50%;font-weight:800}.route-item.done .node{background:var(--green);border-color:var(--green);color:#fff}.route-item small{color:var(--muted)}.route-item h2{margin:3px 0;font-size:20px;line-height:1.25}.route-item p{margin:0;color:var(--muted);font-size:12px}.route-arrow{font-size:23px}.lesson-shell{max-width:1380px;margin:0 auto;display:grid;grid-template-columns:300px minmax(0,900px);gap:50px;padding:44px 24px 90px}.lesson-rail{position:sticky;top:106px;align-self:start;max-height:calc(100vh - 130px);overflow:auto}.lesson-rail .back{margin:0 0 20px}.rail-progress{display:flex;gap:15px;align-items:center;border-bottom:1px solid var(--line);padding-bottom:20px}.rail-progress .progress{flex:1;margin:0}.lesson-rail nav{display:flex;flex-direction:column;padding-top:10px}.lesson-rail nav a{display:grid;grid-template-columns:25px 1fr;gap:9px;padding:10px 8px;color:var(--muted);font-size:12px;line-height:1.35;border-left:3px solid transparent}.lesson-rail nav a span{font-weight:800}.lesson-rail nav a.active{background:#fff;color:var(--ink);border-left-color:var(--accent)}.lesson-rail nav a.done span{color:var(--green)}.study-sheet{background:#fff;box-shadow:0 1px 0 var(--line);padding:clamp(28px,6vw,72px)}.lesson-head{border-bottom:1px solid var(--line);padding-bottom:28px}.lesson-head h1{font-size:clamp(34px,5vw,58px);line-height:1.04;letter-spacing:-.055em;margin:0 0 28px}.outcomes{display:flex;flex-wrap:wrap;gap:8px}.outcomes span{font-size:11px;font-weight:700;background:#edf1ed;padding:7px 10px}.video{position:relative;padding-bottom:56.25%;height:0;margin:36px 0;background:#111}.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.lesson-copy{font-size:17px;line-height:1.8;margin:38px 0}.lesson-copy p:first-child::first-letter{float:left;font-size:58px;line-height:.8;font-weight:800;margin:10px 10px 0 0;color:var(--green)}.source{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-left:5px solid var(--yellow);padding:18px 20px;margin:35px 0}.source span{color:var(--muted);font-size:12px}.quiz-block,.practice{border-top:4px solid var(--ink);margin-top:60px;padding-top:28px}.quiz-block h2,.practice h2,.admin-section h2{font-size:28px;letter-spacing:-.04em;margin:0 0 7px}.muted{color:var(--muted)}fieldset{border:0;border-top:1px solid var(--line);padding:24px 0;margin:26px 0}legend{font-weight:800;font-size:17px;padding:0 15px 0 0}legend span{display:inline-grid;place-items:center;background:var(--ink);color:#fff;width:28px;height:28px;margin-right:10px}.choice{display:flex;align-items:center;gap:10px;border:1px solid var(--line);padding:12px 14px;margin:8px 0;cursor:pointer}.choice:hover{border-color:var(--green);background:#f6faf7}.choice input{accent-color:var(--green)}.primary{border:0;background:var(--ink);color:#fff;padding:13px 21px;font-weight:800;cursor:pointer}.primary:hover{background:var(--green)}.wide{width:100%}.notice{padding:13px 16px;margin:20px 0;font-weight:700;font-size:13px}.notice.success{background:#dff2e7;color:#175b42}.notice.error{background:#fae3e1;color:#8d2f2a}textarea,input{width:100%;border:1px solid #bdc5c0;background:#fff;padding:12px;outline:none}textarea:focus,input:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(31,111,84,.12)}textarea{resize:vertical;margin:10px 0}.lesson-nav{display:flex;justify-content:space-between;gap:30px;border-top:1px solid var(--line);margin-top:60px;padding-top:24px}.lesson-nav a{font-weight:800;font-size:12px}.login-shell{min-height:100vh;display:grid;grid-template-columns:1.15fr .85fr;background:var(--ink)}.login-story{color:#fff;padding:clamp(35px,7vw,100px);display:flex;flex-direction:column;justify-content:center}.brand-large{margin-bottom:80px}.login-story h1{font-size:clamp(42px,6vw,82px);line-height:.98;letter-spacing:-.065em;max-width:800px;margin:0 0 50px}.login-story .eyebrow{color:var(--yellow)}.route-preview{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.route-preview li{border-top:2px solid #506058;padding-top:14px;display:flex;flex-direction:column}.route-preview span{color:#9faaa4;font-size:11px;margin-top:5px}.login-panel{background:var(--paper);display:grid;place-items:center;padding:30px}.login-form{width:min(400px,100%);background:#fff;padding:40px;box-shadow:var(--shadow)}.login-form h2{font-size:32px;letter-spacing:-.04em;margin:0}.login-form label{display:block;font-size:12px;font-weight:800;margin:22px 0}.login-form input{margin-top:7px}.page-head{display:flex;justify-content:space-between;align-items:end;border-bottom:1px solid var(--line);padding-bottom:35px}.page-head>strong{font-size:42px}.page-head>strong span{font-size:13px;color:var(--muted)}.table-wrap{overflow-x:auto;margin-top:30px;background:#fff}table{width:100%;border-collapse:collapse;min-width:700px}th,td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line)}th{font-size:10px;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);background:#edf0ec}td small,td a small{display:block;color:var(--muted)}td a:hover b{color:var(--green)}.empty{text-align:center;color:var(--muted);padding:60px}.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:30px}.summary-grid>div{background:#fff;border-top:4px solid var(--green);padding:22px}.summary-grid strong{font-size:36px;display:block}.summary-grid span{font-size:11px;color:var(--muted)}.admin-section{margin-top:50px}.submission{background:#fff;border-left:5px solid var(--yellow);padding:20px;margin:12px 0}.submission p{white-space:pre-wrap}.submission small{color:var(--muted)}@media(max-width:900px){.course-grid{grid-template-columns:1fr}.course-card{min-height:280px}.lesson-shell{grid-template-columns:1fr}.lesson-rail{position:static;max-height:none}.lesson-rail nav{display:none}.login-shell{grid-template-columns:1fr}.login-story{padding:45px 25px}.brand-large{margin-bottom:45px}.login-panel{padding:25px}.route-preview{grid-template-columns:1fr}.course-head{grid-template-columns:1fr}.course-score{align-items:flex-start}.summary-grid{grid-template-columns:1fr}}@media(max-width:620px){.topbar{height:auto;padding:14px 18px;gap:15px;flex-wrap:wrap}.topbar nav{order:3;width:100%}.account span{display:none}.shell{padding:35px 18px 70px}.hero{grid-template-columns:1fr}.method{grid-template-columns:1fr}.course-head{padding:28px}.route-item{grid-template-columns:42px 1fr;gap:12px}.route-arrow{display:none}.route-item p{display:none}.study-sheet{padding:25px 19px}.lesson-shell{padding:25px 12px}.login-form{padding:28px}.lesson-nav{flex-direction:column}.source{align-items:flex-start;flex-direction:column;gap:6px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}