@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--ink:#13252f;--muted:#65717a;--navy:#111f26;--lime:#d8f779;--paper:#f7f8f4;--line:#dfe4de;--white:#fff;--accent:#345c4a}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:'DM Sans',system-ui,sans-serif}button,input,select{font:inherit}a{color:inherit;text-decoration:none}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #6c9462;outline-offset:3px}.app{display:grid;grid-template-columns:280px minmax(0,1fr)}#sidebar{position:fixed;width:280px;inset:0 auto 0 0;background:var(--navy);color:#cad4d5;display:flex;flex-direction:column;z-index:40;border-right:1px solid #29363c}.brand{display:flex;align-items:center;gap:10px;font-family:Manrope,sans-serif;font-weight:800;font-size:23px;color:white;padding:30px 24px 22px;flex-wrap:wrap}.logo{color:var(--lime);font-size:38px;line-height:1}.edition{font:10px 'DM Sans',sans-serif;letter-spacing:2px;display:block;width:100%;padding-left:46px;color:#8b9d9f}.nav-top{padding:0 20px}.overview{display:block;padding:13px 12px;border-radius:8px;color:white;font-weight:600;margin:4px 0 12px}.overview.active{background:#293a40;color:var(--lime)}.search{display:flex;gap:8px;align-items:center;background:#1c2c33;border:1px solid #3a474c;padding:8px 12px;border-radius:8px}.search span{font-size:25px;color:#a6b7b7}.search input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:white;font-size:13px}.search input::placeholder{color:#a1b1b4}.nav-caption{padding:24px 30px 13px;font-size:10px;letter-spacing:2px;color:#91a6a9}#nav{overflow:auto;padding:0 14px;flex:1}details{margin-bottom:3px}summary{display:flex;align-items:center;gap:10px;padding:12px 10px;font-size:13px;cursor:pointer;list-style:none}summary::-webkit-details-marker{display:none}summary .num{font-size:11px;color:#8fa09c}summary:after{content:'+';margin-left:auto}details[open] summary:after{content:'−'}details[open] summary{color:var(--lime)}.nav-lessons{padding:0 4px 10px 29px}.lesson-link{display:flex;gap:8px;padding:9px 10px;border-radius:6px;font-size:12px;line-height:1.5;margin-bottom:2px}.lesson-link.active{background:#30423e;color:#e8fcb6}.lesson-link .tick{font-size:12px;color:var(--lime);margin-left:auto}.sidebar-foot{padding:20px 24px;border-top:1px solid #2c3a40}.progress-label{display:flex;justify-content:space-between;font-size:11px}.sidebar-foot small{font-size:10px;color:#9aacaf}.meter{height:4px;border-radius:4px;background:#344348;margin:10px 0}.meter i{display:block;background:var(--lime);height:100%;border-radius:4px}main{grid-column:2;min-width:0}header{height:78px;display:flex;align-items:center;padding:0 46px;border-bottom:1px solid 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p{font-size:12px;color:var(--muted);margin:0}.section-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.section-card{background:white;border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;padding:22px;min-height:180px;transition:transform .2s,border-color .2s}.section-card:hover{transform:translateY(-3px);border-color:#718b74}.card-top{display:flex;justify-content:space-between;align-items:center}.card-num{font:700 11px Manrope;color:#849088}.card-icon{display:grid;place-items:center;width:37px;height:37px;background:#eff4e6;border-radius:10px;color:#3b5945;font-size:22px}.section-card h3{font-size:16px;margin:22px 0 8px;letter-spacing:-.3px}.section-card p{font-size:12px;line-height:1.55;color:var(--muted);margin:0 0 22px}.card-bottom{display:flex;justify-content:space-between;font-size:11px;color:#56705a;margin-top:auto}.study-note{margin:26px 0;background:#edf1e7;border:1px solid #dce5d3;border-radius:12px;padding:23px;display:flex;gap:18px;align-items:start}.study-note strong{display:block;font-size:13px;margin-bottom:7px}.study-note p{font-size:12px;line-height:1.7;margin:0;color:#5b6b5e}.study-note .note-icon{font-size:27px;color:#698660}.journey{display:flex;gap:8px;align-items:center;margin:22px 0 0;flex-wrap:wrap}.journey a{background:white;padding:12px;border-radius:7px;border:1px solid var(--line);font-size:12px}.journey .arrow{color:#92a085}.lesson-top{display:flex;align-items:center;gap:9px;color:#6f7d74;font-size:11px;margin-bottom:24px;flex-wrap:wrap}.lesson-top a{color:#304c3a}.lesson-layout{display:grid;grid-template-columns:minmax(0,760px) 190px;gap:36px;justify-content:center}.lesson-main{min-width:0}.lesson-banner{padding:25px 30px;border:1px solid #dbe5d3;background:#edf2e7;border-radius:14px;margin-bottom:24px}.lesson-banner .eyebrow{color:#54734e}.lesson-banner h1{font-size:34px;letter-spacing:-1px;line-height:1.25;margin:12px 0 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a:last-child{text-align:right}.pagination small{display:block;font-size:10px;color:#7b897a;margin-bottom:8px;letter-spacing:1px}.site-foot{font-size:10px;color:#84907f;padding:20px 46px;border-top:1px solid var(--line)}#scrim{display:none}.empty{padding:25px;color:#98aba6;font-size:13px}.error{background:#fff3ea;color:#8e411c;border-radius:8px;padding:16px;font-size:13px}.login{display:grid;grid-template-columns:1fr 1fr;min-height:100vh}.login-art{background:var(--navy);color:white;padding:60px;position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between}.login-art h1{font-size:56px;line-height:1.1;letter-spacing:-2px;margin:25px 0;max-width:540px}.login-art p{max-width:430px;color:#c0cccc;line-height:1.7;font-size:16px}.login-art svg{position:absolute;width:650px;height:650px;bottom:-180px;right:-170px;opacity:.23}.login-art .brand{padding:0}.login-art .eyebrow{color:var(--lime);margin-top:70px}.login-art 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button{display:block;margin-left:auto;border:0;padding:10px;background:white}.loading{padding:70px;text-align:center;color:#74836f}@media(min-width:1600px){#view{padding-top:50px}}@media(max-width:1180px){#view{padding:30px}.section-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-layout{grid-template-columns:minmax(0,1fr)}.outline{display:none}.hero h1{font-size:36px}.hero-copy{padding:30px}header{padding:0 30px}.hero{grid-template-columns:1.4fr .8fr}}@media(max-width:820px){.app{display:block}#sidebar{transform:translateX(-100%);transition:transform .2s;width:285px}#sidebar.open{transform:translateX(0)}#scrim.open{display:block;position:fixed;inset:0;background:#101e2980;z-index:35}#menu{display:block;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;background:white;font-size:18px}header{height:68px;padding:0 18px;gap:12px}.header-label{font-size:9px;letter-spacing:1px}#view{padding:24px}.hero h1{font-size:37px}.hero-copy{padding:28px}.login-art{padding:35px}.login-art h1{font-size:40px}.login{grid-template-columns:1fr}.login-art{min-height:360px}.login-art .eyebrow{margin-top:35px}.login-art small{margin-top:20px}.login-panel{padding:35px 25px}.site-foot{padding:22px 24px}}@media(max-width:520px){#view{padding:18px}.header-label{display:none}.header-actions{gap:10px}.hero{grid-template-columns:1fr;min-height:0}.hero-copy{padding:28px 24px}.hero h1{font-size:35px}.hero p{font-size:13px}.hero .atlas{position:absolute;right:-105px;top:-40px;width:330px;opacity:.16}.stats{grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:10px}.stat{padding-left:0}.stat:nth-child(2){border:0}.section-grid{grid-template-columns:1fr}.section-card{min-height:160px}.section-head{align-items:start;flex-direction:column}.section-head h2{font-size:23px}.section-card h3{margin-top:16px}.article{padding:23px 20px;font-size:16px;line-height:1.8}.article h2{font-size:22px}.article h3{font-size:18px}.lesson-banner{padding:23px 20px}.lesson-banner h1{font-size:29px}.lesson-meta{gap:12px;flex-wrap:wrap}.lesson-tools button{flex:1}.study-note{padding:20px 18px;gap:12px}.login-art{min-height:330px}.login-art h1{font-size:37px}.journey{gap:5px}.journey a{padding:9px;font-size:11px}.pagination a{font-size:12px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}