:root{--bg:#060c14;--bg-deep:#03070d;--surface:#0b1522;--surface-2:#101d2d;--ink:#eaf3ff;--muted:#a8b7c9;--muted-2:#708198;--line:#bbd3f126;--line-bright:#d2e4ff57;--accent:#b8f0ff;--accent-2:#d7c7ff;--mint:#b7f4d0;--danger:#ffc4c8;--shadow:0 24px 70px #00000047;--font:Arial,Helvetica,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--bg-deep)}body{background:var(--bg);color:var(--ink);font-family:var(--font);text-rendering:optimizelegibility;margin:0;font-size:16px;line-height:1.55}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{color:inherit}::selection{color:#fff;background:#b8f0ff52}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{z-index:100;color:#07101c;background:#fff;padding:10px 13px;font-weight:700;transition:top .18s;position:fixed;top:-60px;left:18px}.skip-link:focus{top:12px}.app-shell{z-index:1;min-height:calc(100vh - 160px);position:relative}.stellar-backdrop{z-index:0;background:radial-gradient(circle at 70% 16%,#142742 0%,#08131f 27%,#03070d 76%);position:fixed;inset:0;overflow:hidden}.stellar-video{object-fit:cover;opacity:.58;filter:saturate(.8)contrast(1.07);width:100%;height:100%}.stellar-vignette{background:radial-gradient(circle at 50% 13%,#0000 0%,#03070d1a 34%,#03070dc7 100%);position:absolute;inset:0}.stellar-grid{opacity:.14;background-image:linear-gradient(#bedcff14 1px,#0000 1px),linear-gradient(90deg,#bedcff14 1px,#0000 1px);background-size:48px 48px;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#000,#0000 74%);mask-image:linear-gradient(#000,#0000 74%)}.stellar-noise{opacity:.1;mix-blend-mode:soft-light;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.95' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.7'/%3E%3C/svg%3E");position:absolute;inset:0}.site-header{z-index:30;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#050c14b8;justify-content:space-between;align-items:center;gap:20px;height:76px;padding:0 clamp(18px,4vw,68px);display:flex;position:sticky;top:0}.brand{letter-spacing:.16em;align-items:center;gap:11px;font-size:17px;font-weight:700;display:inline-flex}.brand-mark{align-items:flex-end;gap:3px;height:20px;display:flex}.brand-mark i{background:var(--accent);width:3px;display:block;box-shadow:0 0 14px #b8f0ff73}.brand-mark i:first-child{height:9px}.brand-mark i:nth-child(2){height:18px}.brand-mark i:nth-child(3){background:var(--accent-2);height:13px}.header-nav{gap:24px;margin-left:auto;display:flex}.header-nav a{letter-spacing:.04em;color:var(--muted);font-size:12px;transition:color .18s}.header-nav a:hover{color:var(--ink)}.header-tools{align-items:center;gap:10px;display:flex}.header-action{border:1px solid var(--line-bright);background:#091320a3;padding:9px 11px;font-size:12px;transition:all .18s}.header-action:hover{border-color:var(--accent);background:#b8f0ff21}.menu-trigger{border:1px solid var(--line);cursor:pointer;background:#08101bb8;width:36px;height:34px;padding:7px;display:none}.menu-trigger span:not(.sr-only){background:var(--ink);height:1px;margin:5px 0;display:block}.mobile-nav{display:none}.site-footer{z-index:1;color:var(--muted-2);letter-spacing:.05em;text-transform:uppercase;border-top:1px solid var(--line);background:#03080ec7;justify-content:space-between;align-items:center;gap:16px;padding:21px clamp(18px,4vw,68px);font-size:11px;display:flex;position:relative}.site-footer a{color:var(--muted);transition:color .18s}.site-footer a:hover{color:var(--accent)}.eyebrow{letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin:0 0 12px;font-size:10px;font-weight:700;line-height:1.1}.section{border-top:1px solid var(--line);background:#050c14a8;padding:clamp(64px,8vw,130px) clamp(20px,6vw,116px);position:relative}.section-panel{background:#050d16c9}.section-surface{background:#0b1522d4}.section-head{justify-content:space-between;align-items:flex-end;gap:28px;margin-bottom:34px;display:flex}.section-head h2{letter-spacing:-.058em;max-width:770px;margin:0;font-size:clamp(34px,4.8vw,72px);font-weight:500;line-height:.97}.section-note{max-width:280px;color:var(--muted);margin:0;font-size:13px}.section-meta{color:var(--muted-2);letter-spacing:.14em;text-transform:uppercase;white-space:nowrap;font-size:10px}.section-intro{max-width:790px;color:var(--muted);margin:0 0 42px;font-size:18px}.section-actions{flex-wrap:wrap;gap:10px;margin-top:32px;display:flex}.button{border:1px solid var(--line-bright);letter-spacing:.02em;cursor:pointer;justify-content:center;align-items:center;gap:10px;min-height:43px;padding:12px 15px;font-size:12px;font-weight:700;transition:transform .18s,background .18s,border-color .18s;display:inline-flex}.button:hover{transform:translateY(-2px)}.button:disabled{opacity:.6;cursor:wait}.button-primary{background:var(--accent);border-color:var(--accent);color:#06101b}.button-primary:hover{background:#e6fbff}.button-ghost{color:var(--ink);background:#050d1657}.button-ghost:hover{border-color:var(--accent);background:#b8f0ff1a}.button-row{flex-wrap:wrap;gap:9px;display:flex}.hero{background:linear-gradient(#040a110a,#040a1175 76%,#040a11e0);align-items:flex-end;min-height:calc(100vh - 76px);padding:clamp(90px,14vh,180px) clamp(20px,6vw,116px) clamp(58px,7vw,104px);display:flex;position:relative;overflow:hidden}.hero-inner{z-index:2;max-width:960px;position:relative}.hero h1,.subjects-hero h1,.subject-intro h1,.map-intro h1,.glossary-intro h1,.compare-intro h1,.plan-intro h1,.guide-intro h1,.sources-hero h1,.review-intro h1,.control-head h1,.control-login h1,.control-unconfigured h1{letter-spacing:-.07em;margin:0;font-size:clamp(49px,7.4vw,112px);font-weight:500;line-height:.88}.hero h1 em,.map-intro h1 em,.compare-intro h1 em,.plan-intro h1 em,.guide-intro h1 em,.review-intro h1 em{color:var(--accent-2);font-family:Georgia,serif;font-weight:400}.hero-copy{color:#c4d2e2;max-width:720px;margin:28px 0 33px;font-size:clamp(17px,2vw,22px);line-height:1.48}.hero-actions{flex-wrap:wrap;gap:10px;display:flex}.hero-index{z-index:2;border-top:1px solid var(--line-bright);width:225px;color:var(--muted);padding:19px 0 0;position:absolute;bottom:clamp(42px,7vw,98px);right:clamp(20px,5vw,82px)}.hero-index .index-kicker{color:var(--accent);letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px;font-size:10px;display:block}.hero-index strong{letter-spacing:-.06em;color:#f3f8ff;font-size:27px;font-weight:500;line-height:.94}.hero-index p{margin:14px 0;font-size:11px}.hero-index a{color:var(--accent);gap:7px;font-size:12px;font-weight:700;display:inline-flex}.hero-orbit{border:1px solid #c2dfff2e;border-radius:50%;position:absolute;transform:rotate(-25deg)}.hero-orbit-one{width:860px;height:390px;top:14%;right:-220px}.hero-orbit-two{border-color:#d7c7ff21;width:1120px;height:540px;top:-45%;left:16%}.study-pulse{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;gap:17px 26px;margin-top:59px;padding-top:16px;font-size:11px;display:flex}.study-pulse b{color:var(--ink);margin-right:4px;font-size:16px;font-weight:500}.mode-grid{border-top:1px solid var(--line);border-left:1px solid var(--line);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.mode-grid article{border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#0a172542;min-height:260px;padding:23px;transition:background .2s}.mode-grid article:hover{background:#b8f0ff12}.mode-grid article>span{color:var(--accent);letter-spacing:.15em;font-size:11px}.mode-grid h3{letter-spacing:-.05em;margin:55px 0 8px;font-size:28px;font-weight:500}.mode-grid p{color:var(--muted);max-width:260px;margin:0;font-size:14px}.mode-grid a{color:var(--accent);margin-top:20px;font-size:12px;font-weight:700;display:inline-flex}.search-command{max-width:960px;position:relative}.search-command label,.glossary-search label{color:var(--muted);margin-bottom:10px;font-size:12px;display:block}.search-field{border:1px solid var(--line-bright);min-height:61px;box-shadow:var(--shadow);background:#03090f9e;align-items:center;gap:12px;padding:0 16px;display:flex}.search-field>span{color:var(--accent);font-size:24px}.search-field input{width:100%;color:var(--ink);background:0 0;border:0;outline:0;font-size:17px}.search-field input::placeholder{color:#68798f}.search-results{z-index:10;background:var(--line-bright);box-shadow:var(--shadow);grid-template-columns:1fr 1fr;gap:1px;padding:1px;display:grid;position:absolute;top:100%;left:0;right:0}.search-results>div{background:#0b1725;padding:15px}.result-label{text-transform:uppercase;letter-spacing:.14em;color:var(--accent);margin:0 0 10px;font-size:10px;display:block}.search-results a{border-top:1px solid var(--line);padding:10px;transition:background .18s;display:block}.search-results a:hover{background:#b8f0ff12}.search-results small{color:var(--muted-2);margin-bottom:4px;font-size:10px;display:block}.search-results strong{font-size:14px;font-weight:700;display:block}.search-results p{color:var(--muted);margin:3px 0 0;font-size:12px;line-height:1.35}.empty-state{color:var(--muted);font-size:13px}.module-grid{background:var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;display:grid}.module-card{background:#08121ee0;flex-direction:column;min-height:390px;padding:24px;display:flex}.module-card-top{color:var(--muted-2);letter-spacing:.14em;text-transform:uppercase;justify-content:space-between;align-items:center;font-size:10px;display:flex}.module-card-top i{background:var(--accent);border-radius:50%;width:9px;height:9px;box-shadow:0 0 18px #b8f0ffa6}.module-card h3{letter-spacing:-.056em;margin:44px 0 9px;font-size:30px;font-weight:500;line-height:.98}.module-card>p{color:var(--muted);max-width:300px;margin:0;font-size:13px}.module-card ol{margin:28px 0 0;padding:0;list-style:none}.module-card li{border-top:1px solid var(--line)}.module-card li a{grid-template-columns:26px minmax(0,1fr) 12px;align-items:center;gap:8px;padding:10px 0;font-size:12px;display:grid}.module-card li a:hover{color:var(--accent)}.module-card li span{color:var(--muted-2);font-size:10px}.module-card li b{font-weight:500;line-height:1.25}.module-card li em{color:var(--accent);text-align:right;font-style:normal}.section-dark-callout{background:linear-gradient(135deg,#0b1b2ceb,#070a16f0);grid-template-columns:minmax(0,1.25fr) minmax(280px,.65fr);align-items:end;gap:100px;padding-top:110px;padding-bottom:110px;display:grid}.section-dark-callout h2{letter-spacing:-.065em;margin:0;font-size:clamp(36px,5.3vw,80px);font-weight:500;line-height:.93}.section-dark-callout h2 em{color:var(--accent-2);font-family:Georgia,serif;font-weight:400}.callout-side{border-top:1px solid var(--line-bright);padding-top:18px}.callout-side p{color:var(--muted);margin:0 0 22px}.callout-side a{color:var(--accent);font-size:13px;font-weight:700}.subjects-hero,.subject-intro,.map-intro,.glossary-intro,.compare-intro,.plan-intro,.guide-intro,.sources-hero,.review-intro{border-bottom:1px solid var(--line);background:linear-gradient(#040b1240,#040a11d6);padding:clamp(88px,14vw,190px) clamp(20px,6vw,116px) clamp(48px,7vw,92px)}.subjects-hero p,.subject-intro>p,.map-intro>p,.glossary-intro>p,.compare-intro>p,.plan-intro>p,.guide-intro>p,.sources-hero>p,.review-intro>div>p{max-width:780px;color:var(--muted);margin:23px 0 0;font-size:18px}.subject-directory{background:#050c14b8;padding:0 clamp(20px,6vw,116px) 110px}.subject-card{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-end;gap:30px;padding:31px 0;display:flex}.subject-card span{text-transform:uppercase;letter-spacing:.15em;color:var(--accent);font-size:10px}.subject-card h2{letter-spacing:-.06em;margin:29px 0 8px;font-size:clamp(30px,4vw,58px);font-weight:500;line-height:.95}.subject-card p{max-width:580px;color:var(--muted);margin:0}.subject-card>a{white-space:nowrap;border-bottom:1px solid var(--accent);color:var(--accent);padding:10px 0;font-size:12px;font-weight:700}.subject-card.is-roadmap{opacity:.66}.subject-card.is-roadmap>span{color:var(--muted-2);font-size:11px}.subject-stat,.map-intro>div{flex-wrap:wrap;gap:10px;margin-top:28px;display:flex}.subject-stat span,.map-intro>div span{border:1px solid var(--line);color:var(--muted);text-transform:uppercase;letter-spacing:.08em;padding:7px 9px;font-size:10px}.subject-roadmap{border-bottom:1px solid var(--line);background:#0b1522a3;justify-content:space-between;align-items:flex-end;gap:40px;padding:42px clamp(20px,6vw,116px);display:flex}.subject-roadmap h2{letter-spacing:-.055em;margin:0;font-size:34px;font-weight:500}.subject-roadmap p{max-width:670px;color:var(--muted);margin:7px 0 0}.subject-roadmap>div:last-child{flex-wrap:wrap;gap:10px;display:flex}.subject-list{background:#050c14a8;padding:0 clamp(20px,6vw,116px) 100px}.subject-module{border-bottom:1px solid var(--line);grid-template-columns:.54fr 1.46fr;gap:60px;padding:61px 0;display:grid}.subject-module h2{letter-spacing:-.055em;margin:0;font-size:42px;font-weight:500;line-height:.95}.subject-module>div>p:not(.eyebrow){color:var(--muted);max-width:260px;margin:10px 0 0;font-size:13px}.lesson-row{border-top:1px solid var(--line);grid-template-columns:46px minmax(0,1fr) 20px;align-items:start;gap:14px;padding:17px 0;transition:padding .18s,color .18s;display:grid}.lesson-row:first-child{border-top:0}.lesson-row:hover{color:var(--accent);padding-left:8px}.lesson-row>span{color:var(--muted-2);padding-top:5px;font-size:12px}.lesson-row h3{letter-spacing:-.035em;margin:0;font-size:21px;font-weight:500}.lesson-row p{color:var(--muted);margin:5px 0;font-size:13px;line-height:1.42}.lesson-row small{color:var(--muted-2);text-transform:uppercase;letter-spacing:.08em;font-size:10px}.lesson-row>b{color:var(--accent);font-size:17px;font-weight:400}.lesson-hero{border-bottom:1px solid var(--line);background:#070f19de;padding:47px clamp(20px,6vw,116px) 43px;position:relative}.breadcrumb{color:var(--muted-2);text-transform:uppercase;letter-spacing:.11em;gap:8px;margin-bottom:44px;font-size:10px;display:flex}.breadcrumb a:hover{color:var(--accent)}.lesson-hero-grid{justify-content:space-between;align-items:flex-start;gap:34px;display:flex}.lesson-hero h1{letter-spacing:-.069em;max-width:900px;margin:0;font-size:clamp(44px,6vw,86px);font-weight:500;line-height:.9}.lesson-question{max-width:840px;color:var(--muted);margin:21px 0 0;font-size:18px}.completion{border:1px solid var(--line-bright);cursor:pointer;color:var(--muted);background:#040a1099;flex:none;align-items:center;gap:8px;padding:9px 11px;font-size:11px;font-weight:700;transition:all .18s;display:inline-flex}.completion:hover,.completion.is-complete{border-color:var(--mint);color:var(--mint);background:#b7f4d01a}.completion span{font-size:16px}.lesson-meta{border-top:1px solid var(--line);color:var(--muted-2);letter-spacing:.1em;text-transform:uppercase;flex-wrap:wrap;gap:14px;margin-top:36px;padding-top:14px;font-size:10px;display:flex}.lesson-layout{background:#050c14bd;grid-template-columns:190px minmax(0,790px);gap:clamp(38px,8vw,135px);max-width:1280px;padding:62px clamp(20px,6vw,116px) 80px;display:grid}.lesson-rail{border-top:1px solid var(--line);height:max-content;padding-top:13px;position:sticky;top:107px}.lesson-rail p{color:var(--muted-2);letter-spacing:.12em;text-transform:uppercase;margin:0 0 11px;font-size:10px}.lesson-rail a{color:var(--muted);padding:6px 0;font-size:12px;transition:color .18s;display:block}.lesson-rail a:hover{color:var(--accent)}.lesson-body{min-width:0}.mode-tabs{background:var(--line);grid-template-columns:repeat(3,1fr);gap:1px;margin-bottom:44px;display:grid}.mode-tabs button{cursor:pointer;text-align:left;background:#0c1826d1;border:0;padding:13px 11px;transition:background .18s}.mode-tabs button:hover,.mode-tabs button.active{background:#b8f0ff1f}.mode-tabs span{font-size:13px;font-weight:700;display:block}.mode-tabs small{color:var(--muted-2);margin-top:2px;font-size:10px;display:block}.lesson-body section{margin-top:53px}.lesson-body section:first-child{margin-top:0}.content-head{margin-bottom:17px}.content-head h2,.lesson-body>section>h2{letter-spacing:-.05em;margin:0;font-size:31px;font-weight:500;line-height:.98}.lesson-body p{color:#c3d1df;font-size:17px;line-height:1.68}.core-box,.case-box,.oral-box{border:1px solid var(--line-bright);background:linear-gradient(135deg,#b8f0ff1f,#d7c7ff14);padding:28px 30px}.core-box p:last-child,.case-box p:last-child,.oral-box p:last-child{color:#eff7ff;margin:0;font-size:20px;line-height:1.5}.case-box h2{letter-spacing:-.055em;margin:0 0 15px;font-size:36px;font-weight:500;line-height:.95}.mechanism-list{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.mechanism-list li{border-bottom:1px solid var(--line);grid-template-columns:42px 1fr;align-items:start;gap:13px;padding:15px 0;display:grid}.mechanism-list span{color:var(--accent);letter-spacing:.14em;padding-top:5px;font-size:11px}.mechanism-list p{margin:0}.case-method{border:1px solid var(--line);background:#0a172570;padding:27px}.case-method ol{gap:12px;margin:0;padding:0;list-style:none;display:grid}.case-method li{color:var(--muted);font-size:15px}.case-method strong{color:var(--ink)}.concept-link-grid{background:var(--line);grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;display:grid}.concept-link-grid a{background:#0a1623c2;min-height:160px;padding:17px;transition:background .18s;position:relative}.concept-link-grid a:hover{background:#b8f0ff14}.concept-link-grid span{color:var(--accent);letter-spacing:.12em;text-transform:uppercase;font-size:9px;display:block}.concept-link-grid strong{letter-spacing:-.04em;margin:24px 0 6px;font-size:19px;font-weight:500;display:block}.concept-link-grid p{color:var(--muted);margin:0;font-size:12px;line-height:1.4}.concept-link-grid b{color:var(--accent);font-weight:400;position:absolute;bottom:15px;right:16px}.oral-box{border-left:4px solid var(--accent-2)}.written-list{color:var(--muted);gap:8px;margin:0;padding-left:22px;display:grid}.written-list li{padding-left:4px}.link-chips{flex-wrap:wrap;gap:7px;display:flex}.link-chips a,.link-chips span{border:1px solid var(--line);color:var(--muted);background:#070f1959;padding:7px 9px;font-size:11px}.link-chips a:hover{color:var(--accent);border-color:var(--accent)}.pitfall-box{background:#781a2d24;border:1px solid #ffc4c842;padding:26px}.pitfall-box h2{font-size:25px!important}.pitfall-box ul{color:#f1c9d0;gap:7px;margin:16px 0 0;padding-left:19px;display:grid}.mini-quiz details{border-top:1px solid var(--line);padding:14px 0}.mini-quiz details:last-of-type{border-bottom:1px solid var(--line)}.mini-quiz summary{cursor:pointer;color:var(--ink);align-items:flex-start;gap:10px;font-weight:600;list-style:none;display:flex}.mini-quiz summary::-webkit-details-marker{display:none}.mini-quiz summary span{color:var(--accent);letter-spacing:.1em;font-size:11px}.mini-quiz details p{background:#b8f0ff12;margin:10px 0 0;padding:12px 14px;font-size:15px}.recall-actions{border:1px solid var(--line);background:#0a162391;margin-top:24px;padding:17px}.recall-actions>p{color:var(--muted);margin:0 0 12px;font-size:13px}.recall-actions>div{flex-wrap:wrap;gap:7px;display:flex}.recall-actions button{border:1px solid var(--line-bright);cursor:pointer;background:#050d1699;padding:9px 10px;font-size:11px;transition:all .18s}.recall-actions button:hover{border-color:var(--accent);background:#b8f0ff1a}.recall-actions small{color:var(--mint);margin-top:10px;font-size:11px;display:block}.lesson-pager{background:var(--line);border-top:1px solid var(--line);grid-template-columns:1fr 1fr;gap:1px;display:grid}.lesson-pager>a{background:#09131feb;padding:25px clamp(20px,6vw,116px);transition:background .18s}.lesson-pager>a:hover{background:#b8f0ff14}.lesson-pager>a:last-child{text-align:right}.lesson-pager span{color:var(--muted-2);text-transform:uppercase;letter-spacing:.1em;font-size:10px;display:block}.lesson-pager b{margin-top:5px;font-size:15px;font-weight:500;display:block}.review-intro{justify-content:space-between;align-items:flex-end;gap:50px;display:flex}.session-card{border-top:1px solid var(--line-bright);flex:none;width:180px;padding-top:14px}.session-card span,.session-card p,.session-card small{color:var(--muted-2);text-transform:uppercase;letter-spacing:.1em;font-size:10px;display:block}.session-card strong{letter-spacing:-.08em;color:var(--accent);font-size:58px;font-weight:500;line-height:.9;display:block}.session-card p{margin:8px 0}.review-panel{max-width:1160px;margin:0 auto;padding:54px clamp(20px,6vw,116px) 104px}.review-toolbar{border-bottom:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;gap:16px;padding-bottom:13px;font-size:12px;display:flex}.review-toolbar label{align-items:center;gap:10px;display:flex}.review-toolbar select{border:1px solid var(--line);color:var(--ink);background:#0b1725;padding:8px}.review-toolbar>div{align-items:center;gap:17px;display:flex}.review-toolbar a{color:var(--accent);font-weight:700}.review-card{border:1px solid var(--line);background:#0a1725bf;border-top:0;padding:clamp(31px,5vw,72px)}.review-card>span{color:var(--accent);text-transform:uppercase;letter-spacing:.13em;font-size:10px;display:block}.review-card h2{letter-spacing:-.064em;max-width:900px;margin:25px 0 16px;font-size:clamp(33px,4.6vw,70px);font-weight:500;line-height:.98}.review-instruction{color:var(--muted);margin:0 0 26px;font-size:14px}.review-reveal{border-left:3px solid var(--accent);background:#b8f0ff12;margin:0 0 24px;padding:18px}.review-reveal p{color:#e8f6ff;margin:0;font-size:18px}.review-reveal small{color:var(--muted);margin-top:8px;font-size:11px;display:block}.review-rating{border-top:1px solid var(--line);margin-top:25px;padding-top:18px}.review-rating p{color:var(--muted);margin:0 0 12px;font-size:12px}.review-rating>div{grid-template-columns:repeat(3,1fr);gap:7px;display:grid}.review-rating button{border:1px solid var(--line-bright);cursor:pointer;text-align:left;background:#08121ea3;padding:12px;font-size:12px;font-weight:700;transition:all .18s}.review-rating button:hover{border-color:var(--accent);background:#b8f0ff1a}.review-rating small{color:var(--muted-2);font-size:10px;font-weight:400}.review-context{border:1px solid var(--line);background:#040a11b3;border-top:0;flex-wrap:wrap;align-items:center;gap:12px;padding:17px;font-size:12px;display:flex}.review-context span{color:var(--muted-2);text-transform:uppercase;letter-spacing:.1em;font-size:10px}.review-context strong{font-weight:500}.review-context a{color:var(--accent);margin-left:auto;font-weight:700}.map-intro,.glossary-intro,.compare-intro,.plan-intro,.guide-intro,.sources-hero{padding-bottom:52px}.atlas-map{background:#050c14c2;padding:48px clamp(20px,6vw,116px) 102px}.map-layout{background:var(--line);grid-template-columns:185px minmax(400px,1fr) 300px;gap:1px;min-height:650px;display:grid}.map-index,.map-detail{background:#091421e6;padding:20px}.map-index{flex-direction:column;display:flex}.map-index button{border:0;border-top:1px solid var(--line);text-align:left;cursor:pointer;color:var(--muted);background:0 0;justify-content:space-between;gap:10px;padding:10px 0;font-size:12px;display:flex}.map-index button:first-of-type{border-top:0}.map-index button:hover{color:var(--accent)}.map-index button b{color:var(--muted-2);font-size:10px;font-weight:500}.map-canvas{background:radial-gradient(circle at 54% 48%,#255c8b52,#0000 34%),linear-gradient(145deg,#07111d,#0d1b2b);position:relative;overflow:hidden}.map-canvas:before,.map-canvas:after{content:"";border:1px solid #b8f0ff2e;border-radius:50%;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)rotate(-24deg)}.map-canvas:before{width:90%;height:50%}.map-canvas:after{border-color:#d7c7ff2e;width:63%;height:87%;transform:translate(-50%,-50%)rotate(37deg)}.map-core{z-index:4;border:1px solid var(--line-bright);background:#07131fdb;width:250px;min-height:206px;padding:22px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 0 0 8px #b8f0ff0a,0 24px 50px #00000059}.map-core span{color:var(--accent);letter-spacing:.13em;text-transform:uppercase;font-size:10px;display:block}.map-core strong{letter-spacing:-.05em;margin:22px 0 9px;font-size:28px;font-weight:500;line-height:.96;display:block}.map-core p{color:var(--muted);margin:0;font-size:12px;line-height:1.45}.map-nodes{z-index:5;position:absolute;inset:0}.map-node{border:1px solid var(--line-bright);text-align:left;cursor:pointer;background:#081522e3;width:150px;min-height:78px;padding:12px;transition:transform .18s,background .18s;position:absolute}.map-node:hover{background:#b8f0ff21;transform:translateY(-4px)}.map-node small{color:var(--accent-2);text-transform:uppercase;letter-spacing:.11em;font-size:9px;display:block}.map-node span{margin-top:6px;font-size:15px;font-weight:600;line-height:1.1;display:block}.node-0{top:10%;left:7%}.node-1{top:12%;right:8%}.node-2{bottom:14%;left:6%}.node-3{bottom:13%;right:6%}.node-4{top:6%;left:43%}.node-5{bottom:6%;left:42%}.map-lines{z-index:3;position:absolute;inset:0}.map-lines i{transform-origin:0;background:linear-gradient(90deg,#b8f0ffb3,#0000);width:30%;height:1px;position:absolute;top:50%;left:50%}.line-0{transform:rotate(-145deg)}.line-1{transform:rotate(-35deg)}.line-2{transform:rotate(148deg)}.line-3{transform:rotate(33deg)}.line-4{transform:rotate(-90deg)}.line-5{transform:rotate(90deg)}.map-detail{flex-direction:column;display:flex}.map-relations{background:var(--line);gap:1px;display:grid}.map-relations button{text-align:left;cursor:pointer;background:#050d169e;border:0;padding:12px}.map-relations button:hover{background:#b8f0ff12}.map-relations span{color:var(--accent);text-transform:uppercase;letter-spacing:.12em;font-size:9px;display:block}.map-relations strong{margin:3px 0;font-size:14px;display:block}.map-relations p{color:var(--muted);margin:0;font-size:11px;line-height:1.35}.map-source-links{margin-top:auto;padding-top:18px}.map-source-links p{color:var(--muted-2);text-transform:uppercase;letter-spacing:.1em;margin:0 0 8px;font-size:10px}.map-source-links a{border-top:1px solid var(--line);color:var(--muted);padding:6px 0;font-size:12px;display:block}.map-source-links a:hover{color:var(--accent)}.map-chip-row{flex-wrap:wrap;gap:7px;margin-top:18px;display:flex}.map-chip-row button{border:1px solid var(--line);color:var(--muted);cursor:pointer;background:#060e178f;padding:6px 8px;font-size:10px}.map-chip-row button:hover,.map-chip-row button.active{border-color:var(--accent);color:var(--accent)}.glossary-explorer{background:#050c14b8;padding:46px clamp(20px,6vw,116px) 105px}.glossary-search{max-width:890px}.tag-row{flex-wrap:wrap;gap:7px;margin:23px 0 16px;display:flex}.tag-row button{border:1px solid var(--line);color:var(--muted);cursor:pointer;text-transform:uppercase;letter-spacing:.07em;background:#09131f7a;padding:7px 9px;font-size:10px}.tag-row button.active,.tag-row button:hover{border-color:var(--accent);color:var(--accent);background:#b8f0ff14}.glossary-count{color:var(--muted-2);margin:0 0 15px;font-size:11px}.glossary-grid{background:var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;display:grid}.glossary-grid article{background:#091421d6;flex-direction:column;min-height:294px;padding:20px;scroll-margin-top:110px;display:flex}.glossary-grid article>div:first-child span{color:var(--accent);text-transform:uppercase;letter-spacing:.11em;font-size:9px}.glossary-grid h2{letter-spacing:-.045em;margin:21px 0 6px;font-size:24px;font-weight:500;line-height:.96}.glossary-grid>article>p{color:var(--muted);margin:0;font-size:13px;line-height:1.5}.glossary-grid footer{border-top:1px solid var(--line);margin-top:auto;padding-top:12px}.glossary-grid footer strong{color:var(--accent-2);text-transform:uppercase;letter-spacing:.11em;font-size:10px;display:block}.glossary-grid footer small{color:#d2ddea;margin-top:4px;font-size:11px;line-height:1.35;display:block}.concept-lesson-links{flex-wrap:wrap;gap:5px;margin-top:14px;display:flex}.concept-lesson-links a{border:1px solid var(--line);color:var(--muted);padding:5px 6px;font-size:10px}.concept-lesson-links a:hover{color:var(--accent);border-color:var(--accent)}.compare-lab{background:#050c14b8;padding:45px clamp(20px,6vw,116px) 100px}.compare-counter{border-bottom:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;gap:20px;padding-bottom:14px;font-size:11px;display:flex}.compare-counter button{color:var(--accent);cursor:pointer;background:0 0;border:0;font-size:12px;font-weight:700}.compare-main{background:var(--line);grid-template-columns:1fr 70px 1fr;gap:1px;margin-top:1px;display:grid}.compare-main article{background:#0a1725c9;min-height:320px;padding:clamp(30px,5vw,74px)}.compare-main article span{color:var(--accent);text-transform:uppercase;letter-spacing:.13em;font-size:10px;display:block}.compare-main article h2{letter-spacing:-.065em;margin:80px 0 8px;font-size:clamp(38px,5vw,70px);font-weight:500;line-height:.9}.compare-main article p{color:var(--muted);margin:0}.compare-vs{color:var(--accent-2);background:#060e17e6;place-items:center;font-size:36px;display:grid}.compare-reveal{border:1px solid var(--line-bright);background:linear-gradient(135deg,#b8f0ff24,#d7c7ff1a);margin-top:1px;padding:29px}.compare-reveal p{max-width:780px;margin:0;font-size:21px;line-height:1.45}.compare-reveal small{color:var(--muted);margin-top:11px;font-size:11px;display:block}.compare-lab>.button{margin-top:20px}.compare-rail{flex-wrap:wrap;gap:7px;margin-top:25px;display:flex}.compare-rail button{border:1px solid var(--line);color:var(--muted);cursor:pointer;background:#09131f70;padding:7px 9px;font-size:10px}.compare-rail button.active,.compare-rail button:hover{border-color:var(--accent);color:var(--accent)}.study-planner{background:#050c14bd;padding:45px clamp(20px,6vw,116px) 105px}.plan-config{border:1px solid var(--line);background:#0a1725bf;grid-template-columns:minmax(0,1fr) 360px;gap:60px;padding:30px;display:grid}.plan-config h2{letter-spacing:-.06em;margin:0;font-size:37px;font-weight:500;line-height:.94}.plan-config p{color:var(--muted);max-width:600px;margin:12px 0 0}.plan-controls{gap:22px;display:grid}.plan-controls label{color:var(--muted);gap:9px;font-size:12px;display:grid}.plan-controls label strong{color:var(--accent);font-weight:500}.plan-tabs{gap:6px;display:flex}.plan-tabs button{border:1px solid var(--line);color:var(--muted);cursor:pointer;background:#040a1199;padding:8px;font-size:11px}.plan-tabs button.active,.plan-tabs button:hover{border-color:var(--accent);color:var(--accent)}.plan-controls input{accent-color:#b8f0ff}.plan-status{border-bottom:1px solid var(--line);color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:20px;padding:13px 0;font-size:12px;display:flex}.plan-status span:last-child{color:var(--accent)}.plan-days{background:var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;margin-top:1px;display:grid}.plan-days article{background:#091421d1;min-height:270px;padding:19px}.plan-days article>span{color:var(--accent);text-transform:uppercase;letter-spacing:.12em;font-size:10px}.plan-days h3{letter-spacing:-.05em;margin:38px 0 5px;font-size:24px;font-weight:500;line-height:.98}.plan-days p{color:var(--muted-2);margin:0;font-size:11px}.plan-days ol{border-top:1px solid var(--line);margin:17px 0;padding:0;list-style:none}.plan-days li{border-bottom:1px solid var(--line)}.plan-days li a{grid-template-columns:25px minmax(0,1fr) 9px;gap:6px;padding:8px 0;font-size:11px;line-height:1.2;display:grid}.plan-days li a:hover{color:var(--accent)}.plan-days li b{font-weight:500}.plan-days li span{color:var(--accent);font-size:12px}.plan-days article>small{color:var(--muted);font-size:10px;line-height:1.4;display:block}.guide-grid,.source-grid{border-top:1px solid var(--line);border-left:1px solid var(--line);background:#050c14bd;grid-template-columns:repeat(4,minmax(0,1fr));padding:0 clamp(20px,6vw,116px) 90px;display:grid}.guide-grid article,.source-grid article{border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#0914216b;min-height:250px;padding:29px}.guide-grid span{color:var(--accent);letter-spacing:.13em;font-size:11px}.guide-grid h2,.source-grid h2{letter-spacing:-.048em;margin:52px 0 7px;font-size:26px;font-weight:500;line-height:.98}.guide-grid p,.source-grid p{color:var(--muted);margin:0;font-size:13px}.guide-example{border-top:1px solid var(--line);background:linear-gradient(135deg,#b8f0ff1a,#d7c7ff17);padding:95px clamp(20px,6vw,116px)}.guide-example h2{letter-spacing:-.065em;max-width:900px;margin:0;font-size:clamp(37px,5vw,78px);font-weight:500;line-height:.93}.guide-example>p:not(.eyebrow){max-width:700px;color:var(--muted);margin:18px 0 28px;font-size:17px}.source-grid{grid-template-columns:repeat(3,minmax(0,1fr));padding-top:0}.source-grid article{min-height:300px}.source-grid h2{margin-top:30px}.source-grid a{color:var(--accent);margin-top:22px;font-size:12px;font-weight:700;display:inline-flex}.source-grid code{border:1px solid var(--line);color:var(--accent);background:#040a118f;margin-top:25px;padding:11px;font-size:10px;line-height:1.6;display:block}.control-gate{background:#050c14bd;place-items:center;min-height:calc(100vh - 190px);padding:50px 20px;display:grid}.control-login,.control-unconfigured{border:1px solid var(--line-bright);width:min(100%,880px);box-shadow:var(--shadow);background:#0a1725e6;grid-template-columns:1fr .78fr;gap:45px;padding:42px;display:grid}.control-unconfigured{grid-template-columns:1fr}.control-login h1,.control-unconfigured h1{font-size:clamp(38px,4vw,62px)}.control-login>div>p:not(.eyebrow),.control-unconfigured>p:not(.eyebrow){color:var(--muted);margin:16px 0 0}.control-login form{align-content:center;gap:15px;display:grid}.control-login label{color:var(--muted);text-transform:uppercase;letter-spacing:.09em;gap:7px;font-size:11px;display:grid}.control-login input{border:1px solid var(--line-bright);color:var(--ink);background:#03090fa6;outline:0;padding:12px}.control-login input:focus{border-color:var(--accent)}.form-status{color:var(--danger);margin:0;font-size:12px}.control-unconfigured code{border:1px solid var(--line);color:var(--accent);overflow-wrap:anywhere;background:#03090f8c;padding:12px;font-size:11px;display:block}.control-page{background:#050c14c7;padding:60px clamp(20px,6vw,116px) 110px}.control-head{justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:46px;display:flex}.control-head h1{font-size:clamp(46px,6vw,85px)}.control-head p:not(.eyebrow){max-width:680px;color:var(--muted);margin:18px 0 0}.control-metrics{background:var(--line);grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;display:grid}.control-metrics article{background:#0a1725cc;padding:21px}.control-metrics span,.control-metrics small{color:var(--muted-2);text-transform:uppercase;letter-spacing:.11em;font-size:10px;display:block}.control-metrics strong{color:var(--accent);margin:14px 0 7px;font-size:42px;font-weight:500;line-height:1;display:block}.control-grid{background:var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;margin-top:1px;display:grid}.control-grid article{background:#091421d1;min-height:330px;padding:25px}.control-grid h2{letter-spacing:-.05em;margin:25px 0 11px;font-size:29px;font-weight:500;line-height:.98}.control-grid p:not(.eyebrow){color:var(--muted);margin:0;font-size:13px}.control-grid ul,.control-grid ol{border-top:1px solid var(--line);margin:22px 0 0;padding:0;list-style:none}.control-grid li{border-bottom:1px solid var(--line);justify-content:space-between;gap:10px;padding:8px 0;font-size:12px;display:flex}.control-grid li span{color:var(--muted-2);font-size:10px}.control-grid ol{padding-left:20px;list-style:decimal}.control-grid ol li{color:var(--muted);padding-left:3px;display:list-item}.control-grid code{border:1px solid var(--line);color:var(--accent);background:#03090f8c;margin-top:23px;padding:11px;font-size:10px;line-height:1.7;display:block}.control-actions{border:1px solid var(--line-bright);background:linear-gradient(135deg,#b8f0ff21,#d7c7ff1c);justify-content:space-between;align-items:flex-end;gap:30px;margin-top:35px;padding:30px;display:flex}.control-actions h2{letter-spacing:-.05em;margin:0;font-size:32px;font-weight:500}.control-actions p:not(.eyebrow){color:var(--muted);margin:7px 0 0}.control-actions>div:last-child{gap:9px;display:grid}.control-actions small{color:var(--mint);font-size:11px}.not-found{background:#050c14bd;min-height:70vh;padding:clamp(90px,14vw,190px) clamp(20px,6vw,116px)}.not-found h1{letter-spacing:-.07em;max-width:790px;margin:0;font-size:clamp(48px,7vw,104px);font-weight:500;line-height:.9}.not-found>p:not(.eyebrow){max-width:560px;color:var(--muted);margin:22px 0 30px;font-size:17px}@media (max-width:1100px){.hero-index{display:none}.hero{min-height:650px}.mode-grid,.module-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section-dark-callout{gap:50px}.map-layout{grid-template-columns:160px minmax(350px,1fr)}.map-detail{grid-column:1/-1;grid-template-columns:1fr 1fr;gap:20px;display:grid}.map-source-links{margin-top:0;padding-top:0}.glossary-grid,.plan-days,.guide-grid,.source-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.control-grid{grid-template-columns:1fr 1fr}}@media (max-width:760px){.site-header{height:63px;padding:0 17px}.header-nav,.header-action{display:none}.menu-trigger{display:block}.mobile-nav{border-bottom:1px solid var(--line);box-shadow:var(--shadow);background:#050c14fa;padding:10px 17px 18px;display:grid;position:absolute;top:63px;left:0;right:0}.mobile-nav a{border-bottom:1px solid var(--line);justify-content:space-between;padding:12px 0;font-size:13px;display:flex}.mobile-nav a:last-child{color:var(--accent);border-bottom:0}.site-footer{flex-direction:column;align-items:flex-start;gap:7px;padding:18px 20px}.hero{min-height:calc(100svh - 63px);padding:100px 20px 44px}.hero h1,.subjects-hero h1,.subject-intro h1,.map-intro h1,.glossary-intro h1,.compare-intro h1,.plan-intro h1,.guide-intro h1,.sources-hero h1,.review-intro h1{font-size:54px}.hero-copy{margin-top:22px;font-size:17px}.study-pulse{gap:9px 15px;margin-top:38px}.section{padding:56px 20px}.section-head{flex-direction:column;align-items:flex-start;gap:13px;margin-bottom:26px}.section-head h2{font-size:42px}.section-meta{white-space:normal}.mode-grid{grid-template-columns:1fr}.mode-grid article{min-height:auto;padding:21px}.mode-grid h3{margin-top:30px}.search-results,.module-grid{grid-template-columns:1fr}.module-card{min-height:auto}.section-dark-callout{grid-template-columns:1fr;gap:32px;padding-top:65px;padding-bottom:65px}.section-dark-callout h2{font-size:49px}.subjects-hero,.subject-intro,.map-intro,.glossary-intro,.compare-intro,.plan-intro,.guide-intro,.sources-hero,.review-intro{padding:90px 20px 44px}.subject-roadmap{flex-direction:column;align-items:flex-start;gap:22px;padding:28px 20px}.subject-list{padding:0 20px 65px}.subject-module{grid-template-columns:1fr;gap:26px;padding:42px 0}.subject-module h2{font-size:36px}.lesson-row{grid-template-columns:30px minmax(0,1fr) 12px;gap:10px}.lesson-row h3{font-size:18px}.lesson-hero{padding:32px 20px}.breadcrumb{flex-wrap:wrap;margin-bottom:31px}.lesson-hero-grid{flex-direction:column;gap:22px}.lesson-hero h1{font-size:52px}.lesson-question{font-size:16px}.lesson-layout{grid-template-columns:1fr;padding:40px 20px 55px}.lesson-rail{display:none}.mode-tabs{grid-template-columns:1fr}.lesson-body p{font-size:16px}.content-head h2,.lesson-body>section>h2{font-size:28px}.core-box,.case-box,.oral-box{padding:21px}.core-box p:last-child,.case-box p:last-child,.oral-box p:last-child{font-size:18px}.concept-link-grid,.lesson-pager{grid-template-columns:1fr}.lesson-pager>a,.lesson-pager>a:last-child{text-align:left;padding:20px}.review-intro{flex-direction:column;align-items:flex-start;gap:30px}.session-card{width:100%}.review-panel{padding:34px 20px 68px}.review-card h2{font-size:42px}.review-rating>div{grid-template-columns:1fr}.review-context{flex-direction:column;align-items:flex-start}.review-context a{margin-left:0}.map-layout{grid-template-columns:1fr;min-height:0}.map-index{grid-template-columns:repeat(2,minmax(0,1fr));gap:0;display:grid}.map-index .eyebrow{grid-column:1/-1}.map-canvas{min-height:600px}.map-detail{grid-column:auto;display:block}.map-source-links{margin-top:20px;padding-top:20px}.map-node{width:124px}.node-0{top:8%;left:3%}.node-1{top:10%;right:3%}.node-2{bottom:17%;left:2%}.node-3{bottom:16%;right:2%}.node-4{top:27%;left:33%}.node-5{bottom:27%;left:33%}.map-core{width:205px;min-height:185px}.map-core strong{font-size:25px}.glossary-explorer,.atlas-map,.compare-lab,.study-planner{padding:36px 20px 70px}.glossary-grid,.compare-main{grid-template-columns:1fr}.compare-main article{min-height:200px;padding:32px}.compare-main article h2{margin:39px 0 7px;font-size:47px}.compare-vs{min-height:60px}.plan-config{grid-template-columns:1fr;gap:30px;padding:22px}.plan-days{grid-template-columns:1fr}.guide-grid,.source-grid{grid-template-columns:1fr;padding:0 20px 62px}.guide-grid article,.source-grid article{min-height:auto}.guide-grid h2{margin-top:30px}.guide-example{padding:62px 20px}.guide-example h2{font-size:48px}.control-login,.control-unconfigured{grid-template-columns:1fr;gap:28px;padding:25px}.control-page{padding:44px 20px 70px}.control-head{flex-direction:column;align-items:flex-start;gap:20px}.control-metrics{grid-template-columns:1fr 1fr}.control-grid{grid-template-columns:1fr}.control-actions{flex-direction:column;align-items:flex-start}.not-found{padding:95px 20px}.not-found h1{font-size:55px}}@media (max-width:390px){.hero h1,.subjects-hero h1,.subject-intro h1,.map-intro h1,.glossary-intro h1,.compare-intro h1,.plan-intro h1,.guide-intro h1,.sources-hero h1,.review-intro h1{font-size:47px}.map-canvas{min-height:670px}.map-node{width:110px;font-size:12px}.map-core{width:190px}.control-metrics{grid-template-columns:1fr}.plan-tabs{flex-wrap:wrap}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.stellar-video,.hero-orbit{display:none}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}