:root{
  --navy:#0b163f;--navy-2:#142457;--blue:#3157f6;--violet:#7657ff;--cyan:#27c2e8;
  --bg:#f7f9fc;--ink:#172033;--muted:#5e6880;--ok:#137a4d;--ok-bg:#e1f6eb;
  --warn:#9a5b00;--warn-bg:#fff2d8;--danger:#b42318;--danger-bg:#fee9e7;
  --line:#dfe5f0;--radius:18px;--shadow:0 10px 36px #17203310;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;min-width:320px;color:var(--ink);background:#fff;font:16px/1.65 system-ui,-apple-system,"Segoe UI",sans-serif;overflow-wrap:anywhere}
img,svg{max-width:100%}a{color:inherit}button,input,select,textarea{font:inherit}
.shell{width:min(1160px,calc(100% - 40px));margin-inline:auto}
.skip{position:fixed;top:-80px;left:12px;background:#fff;padding:10px 14px;z-index:100;border-radius:8px;box-shadow:var(--shadow)}.skip:focus{top:12px}
.site-header{background:#fffffff2;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.reader-page .site-header{position:relative;top:auto;backdrop-filter:none}
.nav{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;font-size:1.25rem;font-weight:850;text-decoration:none;color:var(--navy)}.brand span,.eyebrow{color:var(--blue)}
.links{display:flex;align-items:center;gap:24px;margin-left:auto}.links a,.link-btn{text-decoration:none;font-weight:700}.links>a:not(.btn):hover,.link-btn:hover{text-decoration:underline;text-underline-offset:5px}.link-btn{border:0;background:none;color:var(--ink);padding:10px 0;cursor:pointer}.links form{margin:0}.menu{display:none;min-height:44px;border:1px solid var(--line);border-radius:9px;background:white;padding:8px 12px;font-weight:750;color:var(--navy)}
.nav-dropdown{position:relative}.dropdown-trigger{display:flex;align-items:center;gap:6px;min-height:48px}.dropdown-trigger span,.account-trigger>span:last-child{transition:transform .2s}.dropdown-panel{position:absolute;top:calc(100% + 8px);left:0;width:480px;padding:12px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 22px 55px #17203324;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .18s,transform .18s,visibility .18s}.nav-dropdown:hover>.dropdown-panel,.nav-dropdown:focus-within>.dropdown-panel,.nav-dropdown.is-open>.dropdown-panel{opacity:1;visibility:visible;transform:translateY(0)}.nav-dropdown:hover>.dropdown-trigger span,.nav-dropdown:focus-within>.dropdown-trigger span,.nav-dropdown.is-open>.dropdown-trigger span,.account-dropdown.is-open .account-trigger>span:last-child{transform:rotate(180deg)}.dropdown-heading{display:flex;justify-content:space-between;align-items:center;padding:4px 8px 10px;color:var(--muted);font-size:.78rem;font-weight:850;text-transform:uppercase;letter-spacing:.08em}.dropdown-heading a{color:var(--blue);font-size:.76rem}.course-menu-item{display:grid;grid-template-columns:42px 1fr;gap:12px;align-items:center;padding:11px 9px;border-radius:11px}.course-menu-item:hover,.course-menu-item:focus-visible{background:#f3f5ff;text-decoration:none}.course-menu-icon{display:grid;place-items:center;height:42px;border-radius:10px;color:#fff;background:linear-gradient(145deg,var(--navy),var(--violet));font-size:.72rem;font-weight:900}.course-menu-item strong,.course-menu-item small{display:block}.course-menu-item strong{color:var(--navy)}.course-menu-item small{margin-top:2px;color:var(--muted);font-size:.76rem;font-weight:500;line-height:1.35}.account-trigger{display:flex;align-items:center;gap:9px;min-height:48px;padding:4px 6px;border:0;background:transparent;color:var(--navy);font-weight:750;cursor:pointer}.person-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;color:#fff;background:linear-gradient(145deg,var(--blue),var(--violet));box-shadow:0 5px 14px #3157f638}.account-menu{left:auto;right:0;width:230px;padding:8px}.account-summary{display:grid;padding:10px 12px;border-bottom:1px solid var(--line);margin-bottom:5px}.account-summary small{color:var(--muted);font-size:.75rem;overflow:hidden;text-overflow:ellipsis}.account-menu>a,.account-menu .link-btn{display:flex;width:100%;min-height:42px;align-items:center;padding:8px 12px;border-radius:8px;text-align:left}.account-menu>a:hover,.account-menu .link-btn:hover{background:#f3f5ff;text-decoration:none}
.courses-menu{left:auto;right:0}
.links{width:100%;margin-left:0}.account-dropdown{margin-left:auto}.courses-dropdown>.dropdown-trigger{padding-inline:18px;border-inline:1px solid transparent;transition:background .18s,border-color .18s}.courses-dropdown:hover>.dropdown-trigger,.courses-dropdown:focus-within>.dropdown-trigger{background:#f1f3f9;border-color:var(--line)}.courses-menu{left:0;right:auto;display:grid;width:min(780px,calc(100vw - 40px));grid-template-columns:repeat(3,minmax(0,1fr));gap:5px 34px;padding:22px 28px 26px;border-radius:0 0 4px 4px}.courses-menu::before{content:"";position:absolute;top:-9px;left:34px;width:18px;height:18px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line);transform:rotate(45deg)}.courses-menu .dropdown-heading{grid-column:1/-1;position:relative;z-index:1;margin-bottom:8px;padding:0 0 16px;border-bottom:1px solid var(--line)}.courses-menu .course-menu-item{position:relative;display:flex!important;align-items:center;min-height:42px;padding:8px 8px 8px 20px}.courses-menu .course-menu-item::before{content:"";position:absolute;left:4px;width:6px;height:6px;border-radius:50%;background:var(--blue)}.courses-menu .course-menu-item:nth-of-type(2n)::before{background:var(--violet)}.courses-menu .course-menu-item:nth-of-type(3n)::before{background:var(--cyan)}.courses-menu .course-menu-item:nth-of-type(4n)::before{background:#d85d3f}.courses-menu .course-menu-item:nth-of-type(5n)::before{background:#16845b}.courses-menu .course-menu-item strong{font-size:.94rem}.courses-menu .course-menu-item small{display:none}
.courses-menu .course-menu-item::before{border-radius:1px}.courses-menu .course-menu-item strong{font-size:.82rem;font-weight:500;letter-spacing:.045em;text-transform:uppercase}.links .primary-nav-item{position:relative;display:flex;align-items:center;min-height:52px;padding:0 18px;border-inline-start:1px solid #e3e7f0;color:#26324d;font-size:.76rem;font-weight:600;letter-spacing:.075em;text-decoration:none;text-transform:uppercase;transition:color .18s,background .18s}.links>.primary-nav-item:last-of-type{border-inline-end:1px solid #e3e7f0}.links .primary-nav-item::after{content:"";position:absolute;right:18px;bottom:0;left:18px;height:2px;border-radius:2px 2px 0 0;background:linear-gradient(90deg,var(--blue),var(--violet));opacity:0;transform:scaleX(.35);transition:opacity .18s,transform .18s}.links .primary-nav-item:hover,.links .primary-nav-item:focus-visible,.links .primary-nav-item.active{color:var(--navy);background:#f5f6fa;text-decoration:none}.links .primary-nav-item:hover::after,.links .primary-nav-item:focus-visible::after,.links .primary-nav-item.active::after{opacity:1;transform:scaleX(1)}
.course-menu-item{display:block!important;padding-inline:12px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;border:0;border-radius:10px;padding:12px 20px;color:#fff;background:linear-gradient(120deg,var(--blue),var(--violet));font-weight:800;text-decoration:none;text-align:center;cursor:pointer;box-shadow:0 7px 18px #3157f62c}.btn:hover{filter:brightness(.96)}.btn:disabled{cursor:not-allowed;filter:grayscale(.7);opacity:.55;box-shadow:none}.btn.small{min-height:42px;padding:8px 15px}.btn.ghost{color:var(--blue);background:white;border:1px solid #b9c5ff;box-shadow:none}
.hero{background:radial-gradient(circle at 90% 20%,#dfe4ff,transparent 32%),linear-gradient(140deg,#f8fbff,#f7f5ff);padding:88px 0}.hero-grid,.detail-grid,.content-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);gap:64px;align-items:center}.content-grid{align-items:start}
.hero-copy-only{grid-template-columns:minmax(0,820px)}.eyebrow{display:inline-block;text-transform:uppercase;letter-spacing:.14em;font-weight:850;font-size:.78rem}
h1,h2,h3{color:var(--navy);line-height:1.15;text-wrap:balance}h1{font-size:clamp(2.6rem,6vw,5rem);letter-spacing:-.055em;margin:.18em 0}h1 em{font-style:normal;background:linear-gradient(90deg,var(--blue),var(--violet));background-clip:text;color:transparent}h2{font-size:clamp(1.85rem,4vw,3.1rem);letter-spacing:-.035em}h3{line-height:1.3}.lead{font-size:clamp(1.05rem,2vw,1.2rem);color:var(--muted);max-width:680px}.actions,.card-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.dashboard-mock{background:var(--navy);color:white;border-radius:26px;padding:30px;box-shadow:0 30px 80px #1f367438;transform:rotate(1deg)}.dashboard-mock strong{font-size:clamp(2.2rem,6vw,3rem)}
.bar{display:block;width:100%;height:9px;border:0;background:#dbe1ed;border-radius:9px;overflow:hidden;appearance:none}.bar::-webkit-progress-bar{background:#dbe1ed;border-radius:9px}.bar::-webkit-progress-value{background:linear-gradient(90deg,var(--cyan),var(--blue));border-radius:9px}.bar::-moz-progress-bar{background:linear-gradient(90deg,var(--cyan),var(--blue));border-radius:9px}.full-width{width:100%}.mini-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:25px}.mini-cards span{background:#ffffff12;border:1px solid #ffffff20;padding:16px;border-radius:12px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);padding:34px 0;border-bottom:1px solid var(--line)}.stats div{display:grid;text-align:center;min-width:0}.stats b{font-size:1.9rem;color:var(--navy)}.stats span,.meta,.form-hint{color:var(--muted)}
.section{padding-block:80px}.compact-section{padding-block:36px}.alt,.pagehead{background:var(--bg)}.pagehead{padding:60px 0}.pagehead h1,.course-hero h1{font-size:clamp(2.4rem,5vw,4.5rem)}
.cards,.dashboard-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.dashboard-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.card,.panel,.sidebox,.promise{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);min-width:0}.card{transition:transform .2s,box-shadow .2s}.card:hover{transform:translateY(-4px);box-shadow:0 18px 45px #17203318}.cover{height:130px;border-radius:12px;display:grid;place-items:center;font-size:2.5rem;font-weight:900;color:white;background:linear-gradient(145deg,var(--navy),var(--violet));margin-bottom:18px}.pill,.status-badge{display:inline-flex;width:max-content;max-width:100%;align-items:center;background:#e9edff;color:#263fbb;border-radius:99px;padding:5px 10px;font-size:.78rem;font-weight:800}.card h3{font-size:1.3rem}.card h3 a{text-decoration:none}.meta{display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding-top:12px}.arrow{display:inline-block;margin-top:14px;color:var(--blue);font-weight:800}.course-card{position:relative;display:flex;flex-direction:column;min-height:345px;overflow:hidden;padding:28px;border-color:#dce2f1;border-radius:20px;box-shadow:0 10px 32px #1720330b}.course-card::before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:linear-gradient(var(--blue),var(--violet));opacity:0;transition:opacity .2s}.course-card:hover{transform:translateY(-5px);border-color:#c5cef0;box-shadow:0 20px 48px #17203314}.course-card:hover::before{opacity:1}.course-card .pill{padding:6px 10px;border-radius:7px;background:#f0f2ff;color:#3546bd;font-size:.7rem;font-weight:700;letter-spacing:.055em;text-transform:uppercase}.course-card h3{margin:22px 0 12px;font-size:1.28rem}.course-card h3 a{color:var(--navy)}.course-card h3 a:hover{text-decoration:none;color:var(--blue)}.course-card>p{margin:0;color:#49546d;line-height:1.65}.course-card-footer{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-top:auto;padding-top:28px}.course-card .meta{display:flex;flex-wrap:wrap;justify-content:flex-start;gap:8px 16px;padding:0;border:0;color:var(--muted);font-size:.82rem}.course-card .meta span{display:inline-flex;align-items:center;gap:7px}.course-card .meta i{width:6px;height:6px;border-radius:2px;background:var(--cyan)}.course-card-link{display:inline-flex;align-items:center;gap:9px;color:var(--blue);font-size:.82rem;font-weight:700;text-decoration:none}.course-card-link:hover{text-decoration:none}.course-card-link b{display:grid;place-items:center;width:30px;height:30px;border:1px solid #cbd3ff;border-radius:50%;font-size:1rem;font-weight:500;transition:color .18s,background .18s,transform .18s}.course-card-link:hover b{color:#fff;background:var(--blue);transform:translateX(2px)}.steps,.metric-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.metric-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}.metric-grid .card{padding:20px}.metric-grid h3{font-size:1.25rem}.steps b{font-size:2.2rem;color:#bac5ff}.center{text-align:center}.center .lead{margin-inline:auto}
.course-hero{background:var(--navy);color:#dbe2ff;padding:75px 0}.course-hero h1,.course-hero h2{color:white}.course-hero a:not(.btn){color:#fff}.promise{color:var(--ink)}.course-hero .promise h2{color:var(--navy)}
.content-grid details,.prose details{border:1px solid var(--line);border-radius:12px;padding:16px;margin:12px 0;background:#fff;scroll-margin-top:90px}.content-grid summary,.prose summary{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;cursor:pointer;min-height:32px}.content-grid summary span{white-space:nowrap;color:var(--muted)}.sidebox{position:sticky;top:100px}
.unit-guide{margin:18px 0;padding:20px;border:1px solid #d5dcf1;border-radius:14px;background:#f7f9ff}.unit-guide p{max-width:78ch}.unit-guide p:last-child{margin-bottom:0}.unit-project{margin:18px 0;padding:18px;background:#f3f6ff;box-shadow:none}.unit-exercises,.unit-reading{margin:8px 0 18px;padding-left:22px}.unit-reading a{color:#2544d8;text-decoration:underline}.unit-context{width:100%;margin:24px auto;padding:0;box-shadow:none;background:#f7f9ff}.unit-context details{padding:16px;border:0}.unit-context summary{display:flex;justify-content:space-between;gap:16px;cursor:pointer;color:var(--navy)}.unit-context summary span{font-weight:500;color:var(--muted);font-size:.9rem}.unit-context .unit-guide{background:#fff}
.filters{display:grid;grid-template-columns:2fr 1fr 1fr auto;align-items:end;gap:12px;margin-top:28px}.filters label,.panel label,.reader label,.actions label{display:grid;font-weight:700;gap:5px}input,select,textarea{width:100%;min-height:44px;border:1px solid #aeb9cd;border-radius:9px;padding:11px 12px;color:var(--ink);background:#fff}textarea{resize:vertical}input:focus,select:focus,textarea:focus,a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #27c2e866;outline-offset:2px}.auth{min-height:70vh;display:grid;place-items:center;padding-block:60px}.panel{width:min(520px,100%)}.panel h1{font-size:2.5rem}.panel .helptext,.panel ul,.form-hint{font-size:.88rem}.alerts{position:relative;z-index:4}.alerts p,.status-message{background:var(--ok-bg);border-left:4px solid var(--ok);padding:12px 16px}.alerts .error,.status-failed,.status-error{background:var(--danger-bg);border-color:var(--danger);color:#781b14}.status-pending,.status-submitted,.status-revision{background:var(--warn-bg);color:var(--warn)}.status-passed{background:var(--ok-bg);color:var(--ok)}
.course-directory-head{padding:64px 0 0;background:linear-gradient(145deg,#f7f9ff,#eef2ff)}.course-directory-intro{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);gap:72px;align-items:end}.course-directory-intro h1{max-width:650px;margin-bottom:0;font-size:clamp(3rem,5.5vw,5.1rem);line-height:.98}.course-directory-intro .lead{max-width:520px;margin:0 0 5px}.course-filter-bar{display:grid;grid-template-columns:1fr minmax(180px,240px) minmax(180px,240px) auto;gap:14px;align-items:end;margin-top:48px;padding:18px 20px;border:1px solid #d8dff3;border-bottom:0;border-radius:18px 18px 0 0;background:#fff;box-shadow:0 -6px 30px #17203308}.course-filter-label{align-self:center;color:var(--navy);font-size:.78rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase}.course-filter-bar label{display:grid;gap:6px;color:var(--muted);font-size:.76rem;font-weight:750;letter-spacing:.04em;text-transform:uppercase}.course-filter-bar select{min-height:42px;border-color:#cbd3e6;border-radius:8px;padding-block:9px;font-size:.9rem;font-weight:600;text-transform:none;letter-spacing:0}.course-filter-bar .btn{min-height:42px}
.section-title-row{display:flex;justify-content:space-between;align-items:center;gap:18px}.course-position{font-size:1.6rem;font-weight:900;color:var(--ds-text-muted,#526077)}.dashboard-card{display:flex;flex-direction:column}.dashboard-card .card-actions{margin-top:auto;padding-top:12px}.learning-signals{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.learning-signals span{background:var(--bg);border-radius:8px;padding:7px 9px;font-size:.82rem}
.reader{display:grid;grid-template-columns:320px minmax(0,1fr);align-items:start;min-height:calc(100vh - 74px)}.reader-sidebar{position:static;align-self:stretch;height:auto;overflow:visible;background:var(--navy);color:#fff;padding:24px 18px;min-width:0}.reader-sidebar-head{position:static;background:var(--navy);padding-bottom:16px}.reader-sidebar h2{color:white;margin:20px 0 5px}.reader-sidebar p{color:#cbd5f5;margin:4px 0}.reader-sidebar a{color:#fff}.reader-toggle{display:none}.reader-outline{display:grid;position:relative;margin-top:18px}.reader-unit{border-top:1px solid #ffffff1f}.reader-unit summary{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 8px;cursor:pointer;font-weight:800;color:#fff}.reader-unit summary small{display:grid;place-items:center;min-width:25px;height:25px;border-radius:50%;background:#ffffff18}.reader-unit a{display:block;padding:10px 12px;border-radius:8px;text-decoration:none;color:#dce3ff;font-size:.92rem}.reader-unit a:hover{background:#ffffff0d}.reader-unit a.active{background:#ffffff1c;color:#fff;font-weight:800}.reader-main{width:min(100%,970px);padding:48px clamp(28px,5vw,72px);min-width:0}.reader-main>*,.lesson-heading{max-width:820px;margin-inline:auto}.lesson-heading{position:static;background:transparent;border:0;backdrop-filter:none}.reader-main h1{font-size:clamp(2.35rem,5vw,3.7rem)}.lesson-content{font-size:1.08rem;margin-block:32px}.lesson-content h2{font-size:clamp(1.75rem,3.5vw,2.5rem);margin-top:1.6em}.lesson-content h3{font-size:1.35rem;margin-top:1.5em}.lesson-content code:not(pre code),.command code,.reader-main>*>code{background:#eef1f7;border-radius:5px;padding:.12em .35em;font-size:.9em}.lesson-content pre{max-width:100%}.lesson-content table{display:table;width:100%;min-width:0;max-width:100%;overflow:visible;white-space:normal;table-layout:auto}.lesson-pager{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:14px;align-items:center;margin-top:38px}.lesson-pager-top{grid-template-columns:1fr auto 1fr;margin-top:0;margin-bottom:28px;padding-bottom:16px;border-bottom:1px solid var(--line);font-size:.9rem}.lesson-pager-top a:last-child{text-align:right}.lesson-pager .btn:last-child{justify-self:end}.lab-panel,.solution-panel{width:100%;margin-block:36px}.lab-panel h2{margin-top:5px}.checklist{padding-left:0;list-style:none}.checklist li{position:relative;padding-left:28px;margin:8px 0}.checklist li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:900}.command{display:grid;grid-template-columns:1fr auto;gap:4px 12px;background:var(--navy);color:#fff;border-radius:12px;padding:16px;margin:22px 0}.command b{grid-column:1/-1}.command code{background:#ffffff16!important;overflow:visible;white-space:pre-wrap;overflow-wrap:anywhere;padding:8px}.command span{font-size:.8rem;color:#cbd5f5;align-self:center}.evidence-panel{border-top:1px solid var(--line);margin-top:28px;padding-top:22px}.stacked-form p{margin:14px 0}.stacked-form label{font-weight:750}.stacked-form .errorlist{color:var(--danger);font-weight:700}.solution-panel details,.solution-panel summary{cursor:pointer}.lesson-notes{margin-top:38px}.reader-main .solution-panel{max-width:820px}
.assessment-form{width:min(820px,100%);padding:clamp(18px,4vw,34px)}.assessment-form fieldset{border:0;border-bottom:1px solid var(--line);padding:0 0 28px;margin:0 0 28px;min-width:0}.assessment-form legend{display:flex;gap:12px;width:100%;font-weight:800;font-size:1.08rem;line-height:1.45;color:var(--navy);margin-bottom:15px}.assessment-form legend>span{display:grid;place-items:center;flex:0 0 30px;height:30px;border-radius:50%;background:#e9edff;color:var(--blue)}.assessment-form fieldset label{display:flex;grid-template-columns:none;align-items:flex-start;gap:12px;font-weight:500;border:1px solid var(--line);border-radius:10px;padding:12px;margin:9px 0;cursor:pointer}.assessment-form fieldset label:hover{background:var(--bg)}input[type=radio]{width:20px;min-width:20px;min-height:20px;margin-top:2px;padding:0}.feedback-list details{padding:18px}.feedback-list summary{justify-content:flex-start}.answer-mark{flex:0 0 auto;border-radius:99px;padding:2px 8px;font-size:.78rem;font-weight:850}.answer-mark.correct{background:var(--ok-bg);color:var(--ok)}.answer-mark.review{background:var(--danger-bg);color:var(--danger)}.recommendation-panel{width:100%}.chip-list{display:flex;flex-wrap:wrap;gap:10px}.chip-list a{background:#e9edff;color:#263fbb;border-radius:99px;padding:8px 12px;text-decoration:none;font-weight:750}
.assignment-layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(300px,.6fr);gap:44px;align-items:start}.assignment-layout aside{position:sticky;top:100px}.requirements-list li{padding:7px 0}.table-scroll{max-width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:12px}table{width:100%;min-width:640px;border-collapse:collapse;background:#fff}th,td{padding:14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}thead th{color:var(--navy);background:var(--bg)}tbody tr:last-child>*{border-bottom:0}
.certificate-wrap{padding-block:70px}.certificate-card{width:min(880px,100%);padding:clamp(28px,6vw,64px);border:8px double #d8def1}.certificate-card h1{font-size:clamp(2.2rem,5vw,4rem)}.certificate-scores{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:32px 0}.certificate-scores div{display:grid;background:var(--bg);padding:18px;border-radius:12px}.certificate-scores b{font-size:1.8rem;color:var(--navy)}.certificate-evidence{background:#f3f6ff;padding:18px;border-radius:12px;margin:22px 0}.certificate-evidence code{display:inline-block;max-width:100%;word-break:break-all}
.analytics-bars{display:grid;gap:14px}.analytics-bars>div{display:grid;grid-template-columns:110px minmax(0,1fr) 40px;gap:14px;align-items:center}.two-column{display:grid;grid-template-columns:1.2fr .8fr;gap:44px}.learning-metrics{width:100%}.learning-metrics p{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:14px;border-bottom:1px solid var(--line);padding-bottom:12px}.learning-metrics b{font-size:1.6rem;color:var(--navy)}.metric-definitions{width:100%;margin-top:28px}.metric-definitions h2{font-size:1.4rem}.pagination{display:flex;justify-content:center;gap:20px;margin-top:35px}.empty{grid-column:1/-1;padding:45px;text-align:center;background:var(--bg);border-radius:var(--radius)}
footer{background:var(--navy);color:#cbd5f5;padding:45px 0}.footer{display:flex;justify-content:space-between;gap:40px}.footer .brand{color:white}.footer>div:last-child{display:flex;align-items:flex-start;justify-content:flex-end;gap:10px 24px;flex-wrap:wrap}.footer a{text-decoration:none;min-height:32px}

@media(max-width:1080px){
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}.metric-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.reader{grid-template-columns:280px minmax(0,1fr)}.reader-main{padding-inline:36px}.hero-grid,.detail-grid,.content-grid{gap:38px}
}
@media(max-width:860px){
  html{scroll-padding-top:76px}.shell{width:min(100% - 32px,720px)}.menu{display:inline-flex;align-items:center;gap:7px}.links{display:none;position:absolute;top:74px;left:0;right:0;max-height:calc(100vh - 74px);overflow:auto;background:white;padding:18px max(20px,calc((100vw - 720px)/2));box-shadow:0 12px 25px #0002;flex-direction:column;align-items:stretch;gap:4px;margin-right:0}.links.open{display:flex}.links a,.links .link-btn{display:flex;align-items:center;min-height:48px;width:100%;padding:8px 10px}.links form{width:100%}.links .btn{justify-content:center}.dropdown-panel{position:static;width:100%;margin:3px 0 10px;box-shadow:none;transform:none}.courses-menu{opacity:1;visibility:visible;background:var(--bg)}.account-menu{display:none;opacity:1;visibility:visible}.account-dropdown.is-open .account-menu{display:block}.account-trigger{width:100%;justify-content:flex-start}.course-menu-item{grid-template-columns:42px 1fr!important}.course-menu-item small{display:block}.hero{padding:58px 0}.hero-grid,.detail-grid,.content-grid,.assignment-layout,.two-column{grid-template-columns:1fr;gap:34px}.dashboard-mock{transform:none}.stats{grid-template-columns:1fr 1fr;gap:22px}.steps{grid-template-columns:1fr 1fr}.filters{grid-template-columns:1fr 1fr}.filters label:first-child{grid-column:1/-1}.sidebox,.assignment-layout aside{position:static}.reader{grid-template-columns:1fr}.reader-sidebar{position:static;height:auto;overflow:visible;scrollbar-gutter:auto;padding:16px}.reader-sidebar-head{position:static}.reader-sidebar-head h2{font-size:1.35rem;margin:12px 0 3px}.reader-toggle{display:flex;width:100%;align-items:center;justify-content:space-between;margin-top:14px;min-height:46px;border:1px solid #ffffff33;background:#ffffff10;color:#fff;border-radius:9px;padding:10px 12px;font-weight:800}.reader-outline{display:none;margin-top:12px}.reader-sidebar.outline-open .reader-outline{display:grid}.reader-sidebar.outline-open .reader-toggle span{transform:rotate(180deg)}.reader-main{width:100%;padding:34px max(24px,calc((100vw - 720px)/2))}.reader-main>*{max-width:100%}.section{padding-block:60px}.pagehead{padding:44px 0}.footer{display:grid;grid-template-columns:1fr 1fr}.two-column{gap:24px}.assignment-layout aside{order:-1}.command{grid-template-columns:1fr}.command span{margin-top:4px}.content-grid summary{flex-wrap:wrap}.content-grid summary span{white-space:normal}
}
@media(max-width:860px){.links{width:auto}.header-account{margin-left:auto}.header-account .account-trigger{width:auto;justify-content:center}.header-account .account-menu{position:absolute;top:calc(100% + 8px);right:0;left:auto;width:min(260px,calc(100vw - 24px));margin:0;padding:8px;background:#fff;box-shadow:0 18px 45px #17203324;transform:translateY(-8px)}.header-account.is-open .account-menu{transform:translateY(0)}.courses-dropdown>.dropdown-trigger{padding-inline:10px;border:0}.courses-menu{display:none;width:100%;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 18px;padding:16px;border:1px solid var(--line);border-radius:4px;background:#fff}.courses-dropdown.is-open .courses-menu{display:grid}.courses-menu::before{display:none}.courses-menu .dropdown-heading{grid-column:1/-1;margin-bottom:5px;padding:4px 4px 12px}.courses-menu .course-menu-item{min-height:40px;padding:7px 6px 7px 20px}.courses-menu .course-menu-item small{display:none}.course-directory-head{padding-top:50px}.course-directory-intro{grid-template-columns:1fr;gap:22px}.course-directory-intro .lead{max-width:640px}.course-filter-bar{grid-template-columns:1fr 1fr auto;margin-top:34px}.course-filter-label{grid-column:1/-1}}
@media(max-width:600px){
  .shell{width:calc(100% - 24px)}body{font-size:15.5px}.nav{min-height:66px}.links{top:66px;max-height:calc(100vh - 66px);padding-inline:12px}.courses-menu{grid-template-columns:1fr}.hero{padding:44px 0}.hero h1{font-size:clamp(2.45rem,13vw,3.5rem)}.hero-grid{gap:28px}.actions,.card-actions{display:grid;grid-template-columns:1fr}.actions .btn,.card-actions .btn,.card-actions form,.card-actions button{width:100%}.mini-cards,.cards,.dashboard-grid,.steps,.metric-grid{grid-template-columns:1fr}.stats{padding:25px 0}.stats b{font-size:1.55rem}.stats span{font-size:.82rem}.section{padding-block:48px}.pagehead{padding:36px 0}.course-directory-head{padding:38px 0 0}.pagehead h1,.course-hero h1{font-size:clamp(2.2rem,12vw,3.2rem)}.course-filter-bar{grid-template-columns:1fr;margin-top:28px;padding:16px;border-radius:14px 14px 0 0}.course-filter-label{grid-column:auto}.course-filter-bar .btn{width:100%}.course-hero{padding:48px 0}.card,.panel,.sidebox,.promise{padding:19px;border-radius:14px}.cover{height:105px}.filters{grid-template-columns:1fr}.filters label:first-child{grid-column:auto}.reader-main{padding:28px 16px}.reader-main h1{font-size:clamp(2.1rem,11vw,3rem)}.lesson-content{font-size:1rem;margin-block:26px}.lesson-content h2{font-size:1.65rem}.lesson-content table{display:table;width:100%;min-width:0;max-width:100%;table-layout:fixed;font-size:.78rem}.lesson-content th,.lesson-content td{padding:8px 6px;overflow-wrap:normal;word-break:normal}.lesson-content td code{white-space:normal;overflow-wrap:anywhere;word-break:break-word}.lesson-pager-top{font-size:.82rem}.lesson-pager{grid-template-columns:1fr}.lesson-pager .btn,.lesson-pager .btn:last-child{width:100%;justify-self:stretch}.lesson-pager-top{grid-template-columns:1fr auto 1fr}.lesson-pager-top span{text-align:center}.section-title-row{align-items:flex-start;flex-wrap:wrap}.lab-panel .section-title-row{display:block}.lab-panel .status-badge{margin-top:6px}.assessment-form{padding:16px}.assessment-form fieldset{margin-bottom:22px;padding-bottom:22px}.assessment-form legend{font-size:1rem}.feedback-list summary{display:block}.answer-mark{display:inline-flex;margin-bottom:7px}.certificate-scores{grid-template-columns:1fr}.analytics-bars>div{grid-template-columns:75px minmax(0,1fr) 28px;gap:8px}.footer{grid-template-columns:1fr}.table-scroll{margin-inline:-12px;border-radius:0}.chip-list{display:grid}.chip-list a{text-align:left;border-radius:10px}.meta{display:grid}.content-grid details{padding:13px}.unit-context summary{display:block;margin-top:5px}.unit-guide{padding:15px}.dashboard-mock{padding:22px}
}
@media(max-width:600px){.unit-context summary{display:block;margin-top:0}.unit-context summary span{display:block;margin-top:5px}}
.login-panel{width:min(580px,100%);padding:0 28px 28px;overflow:hidden}.signup-prompt{display:flex;align-items:center;justify-content:space-between;gap:22px;margin:0 -28px 30px;padding:20px 28px;border-bottom:1px solid #cce8d9;background:linear-gradient(135deg,#f1fbf6,#e8f7ef)}.signup-prompt>div{display:grid;gap:2px}.signup-prompt>div>span{color:#155f40;font-size:.72rem;font-weight:800;letter-spacing:.075em;text-transform:uppercase}.signup-prompt small{max-width:290px;color:#4f685d;font-size:.77rem;line-height:1.4}.signup-primary{display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:10px 15px;border:1px solid #8bc8a8;border-radius:10px;color:#11643f;background:#fff;font-size:.73rem;font-weight:800;letter-spacing:.055em;text-decoration:none;text-transform:uppercase;box-shadow:0 7px 18px #17673f12;transition:transform .18s,background .18s,border-color .18s}.signup-primary:hover,.signup-primary:focus-visible{border-color:#5cad82;background:#e8f7ef;text-decoration:none;transform:translateY(-1px)}.login-heading{margin-bottom:20px}.login-heading h1{margin-bottom:0}.google-signin{position:relative;width:100%;gap:12px}.google-icon{display:grid;place-items:center;width:28px;height:28px;padding:5px;border-radius:50%;background:#fff;box-shadow:0 2px 7px #17203320}.google-icon svg{display:block;width:18px;height:18px}.auth-divider{display:flex;align-items:center;gap:12px;margin:22px 0;color:var(--muted);font-size:.78rem;text-align:center}.auth-divider::before,.auth-divider::after{content:"";height:1px;flex:1;background:var(--line)}.auth-divider span{flex:0 0 auto}.email-signin-form{display:grid;gap:17px}.auth-field{display:grid;gap:6px}.auth-field>label,.password-label-row label{font-weight:700}.password-label-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px}.password-label-row a{color:#4458c5;font-size:.78rem;font-weight:650;text-decoration:none}.password-label-row a:hover{text-decoration:underline;text-underline-offset:3px}.email-signin-form .errorlist{margin:0;padding:10px 12px;border-radius:8px;color:#8b2a22;background:var(--danger-bg);font-size:.82rem;list-style:none}.login-submit{display:flex;margin:2px 0 0 auto}.enterprise-signin{margin:34px -10px 0;padding:18px 18px 4px;border-top:1px solid var(--line);border-radius:16px 16px 0 0;background:#f8f9fc;text-align:center}.enterprise-signin-separator{position:relative;top:-34px;display:inline-flex;align-items:center;justify-content:center;min-width:42px;margin-bottom:-30px;padding:3px 10px;border:1px solid var(--line);border-radius:99px;color:var(--muted);background:#fff;font-size:.66rem;text-transform:uppercase}.enterprise-signin-separator::before,.enterprise-signin-separator::after{display:none}.enterprise-signin h2{margin:12px 0 5px;font-size:1.05rem}.enterprise-signin p{margin:0 auto 14px;max-width:420px;color:var(--muted);font-size:.86rem}.enterprise-signin-row{display:flex;gap:8px}.enterprise-signin-row input{min-width:0;flex:1}.enterprise-signin-row .btn{white-space:nowrap}@media(max-width:600px){.login-panel{padding-inline:19px}.signup-prompt{align-items:stretch;flex-direction:column;margin-inline:-19px;padding-inline:19px}.signup-primary{width:100%}.password-label-row{align-items:flex-start}.enterprise-signin-row{flex-direction:column}.enterprise-signin-row .btn{width:100%}}
.links>a.primary-nav-item:hover,.links>a.primary-nav-item:focus-visible,.courses-dropdown>.primary-nav-item:hover,.courses-dropdown>.primary-nav-item:focus-visible{text-decoration:none}.links .primary-nav-item::after{display:none}@media(max-width:860px){.links .primary-nav-item::after{display:block}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.back-to-top{position:fixed;right:clamp(16px,3vw,34px);bottom:clamp(18px,4vw,38px);z-index:18;display:grid;place-items:center;width:48px;height:48px;padding:0;border:1px solid #ffffff66;border-radius:50%;color:#fff;background:linear-gradient(145deg,var(--blue),var(--violet));box-shadow:0 12px 30px #17203338;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px) scale(.92);transition:opacity .2s,visibility .2s,transform .2s,box-shadow .2s}.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0) scale(1)}.back-to-top:hover{transform:translateY(-3px) scale(1.04);box-shadow:0 16px 36px #17203348}.back-to-top svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.auth-cta{margin-left:auto}@media(max-width:860px){.auth-cta{margin-left:0}.links .primary-nav-item{min-height:46px;padding:8px 12px;border:0;border-radius:8px;font-size:.74rem}.links .primary-nav-item::after{top:10px;right:auto;bottom:10px;left:0;width:3px;height:auto;transform:scaleY(.35)}.links .primary-nav-item:hover::after,.links .primary-nav-item:focus-visible::after,.links .primary-nav-item.active::after{transform:scaleY(1)}}@media print{header,footer,.print-button,.skip{display:none!important}body{background:#fff}.certificate-wrap{padding:0}.certificate-card{box-shadow:none;border-color:#555;max-width:none}.certificate-evidence{break-inside:avoid}}
.lesson-heading-actions{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin-top:20px}.lesson-action-badge{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:8px 14px;border:1px solid transparent;border-radius:99px;font-size:.69rem;font-weight:750;letter-spacing:.075em;text-decoration:none;text-transform:uppercase;transition:color .18s,background .18s,border-color .18s,transform .18s}.lesson-action-badge:hover,.lesson-action-badge:focus-visible{text-decoration:none;transform:translateY(-1px)}.lesson-action-badge.checkpoint{color:#4f3eaf;background:#eeeaff;border-color:#aca1e4}.lesson-action-badge.checkpoint:hover{color:#eeeaff;background:#4f3eaf;border-color:#4f3eaf}.lesson-action-badge.discussion{color:#116176;background:#e2f7fb;border-color:#8acbd7}.lesson-action-badge.discussion:hover{color:#e2f7fb;background:#116176;border-color:#116176}@media(max-width:600px){.lesson-heading-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.lesson-action-badge{width:100%;padding-inline:8px;font-size:.61rem;text-align:center}}
.account-menu{width:250px;padding:10px;border-color:#e2e6f0;border-radius:18px}.account-summary{gap:3px;margin:0 0 8px;padding:12px 13px 14px;border-bottom:1px solid #e7eaf2}.account-name{color:var(--navy);font-size:.92rem;font-weight:500}.account-signout-form{padding:8px 12px 10px}.account-menu .account-signout-badge{width:max-content;min-height:32px;padding:7px 12px;border:1px solid #efcbd0;border-radius:99px;color:#a64b55;background:#fff7f8;font-size:.68rem;font-weight:500;letter-spacing:.055em;text-decoration:none;text-transform:uppercase}.account-menu .account-signout-badge:hover,.account-menu .account-signout-badge:focus-visible{color:#8f3541;background:#fdebed;border-color:#e4aeb6;text-decoration:none}.courses-menu .dropdown-heading{justify-content:flex-end}
.course-filter-bar{grid-template-columns:1fr minmax(180px,240px) auto}@media(max-width:860px){.course-filter-bar{grid-template-columns:1fr auto}}@media(max-width:600px){.course-filter-bar{grid-template-columns:1fr}}
.person-icon{overflow:hidden}.person-icon img{width:100%;height:100%;object-fit:cover}.account-menu>a.account-profile-link{min-height:38px;padding:7px 13px;color:#38445d;font-size:.82rem;font-weight:500;text-decoration:none}.account-menu>a.account-profile-link:hover,.account-menu>a.account-profile-link:focus-visible{color:var(--blue);background:#f4f6ff;text-decoration:none}
.language-switcher{display:inline-flex;flex:0 0 auto;align-items:center;gap:2px;padding:3px;border:1px solid var(--line);border-radius:99px;background:#f7f8fc}.language-switcher a{display:grid;place-items:center;min-width:31px;height:28px;padding:0 7px;border-radius:99px;color:var(--muted);font-size:.64rem;font-weight:700;letter-spacing:.06em;text-decoration:none}.language-switcher a:hover,.language-switcher a:focus-visible{color:var(--navy);background:#fff;text-decoration:none}.language-switcher a[aria-current="true"]{color:#fff;background:linear-gradient(145deg,var(--blue),var(--violet));box-shadow:0 3px 9px #3157f62d}@media(max-width:600px){.language-switcher{margin-left:auto}.language-switcher a{min-width:28px;height:26px;padding-inline:5px}.header-account{margin-left:0}}
.menu{flex:0 0 auto;white-space:nowrap}@media(max-width:600px){.nav{gap:8px}.menu{padding-inline:9px;font-size:.82rem}}
.community-menu{right:0;left:auto}.community-menu::before{right:52px;left:auto}@media(max-width:860px){.community-menu{right:auto;left:auto}.community-menu::before{display:none}}