:root{
  --turquoise:#0f6f73;
  --turquoise-2:#12868a;
  --turquoise-soft:#e8f4f4;
  --slate:#56636f;
  --charcoal:#22313a;
  --muted:#667682;
  --orange:#d86f28;
  --orange-dark:#b65317;
  --white:#ffffff;
  --paper:#f7f9fa;
  --line:#d9e1e5;
  --success:#2d6a4f;
  --shadow:0 12px 30px rgba(34,49,58,.08);
  --radius:16px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--charcoal);background:var(--white);line-height:1.55}
a{color:var(--turquoise);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.skip{position:absolute;left:-9999px;top:auto}.skip:focus{left:16px;top:12px;z-index:999;background:#fff;padding:10px;border:2px solid var(--turquoise)}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}
.nav-wrap{max-width:var(--max);margin:auto;display:flex;align-items:center;gap:22px;padding:12px 20px}
.brand{display:flex;align-items:center;gap:10px;color:var(--charcoal);font-weight:800;letter-spacing:.1px;min-width:max-content}.brand:hover{text-decoration:none}
.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(145deg,var(--turquoise),var(--turquoise-2));position:relative;box-shadow:var(--shadow)}
.brand-mark:after{content:"A";position:absolute;inset:0;display:grid;place-items:center;color:white;font-weight:900;font-size:21px}
.brand-name{font-size:15px;line-height:1.05}.brand-name small{display:block;color:var(--slate);font-weight:600;font-size:10px;letter-spacing:.55px;text-transform:uppercase;margin-top:3px}
.nav-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:white;border-radius:10px;padding:8px 11px;font-weight:700}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:4px}.main-nav>a,.dropbtn{border:0;background:transparent;color:var(--charcoal);font:inherit;font-weight:650;padding:10px 9px;border-radius:9px;cursor:pointer}.main-nav>a:hover,.dropbtn:hover,.dropdown:focus-within .dropbtn{background:var(--turquoise-soft);text-decoration:none}
.dropdown{position:relative}.dropdown-menu{display:none;position:absolute;top:100%;left:0;width:310px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:12px;padding:8px}.dropdown:hover .dropdown-menu,.dropdown:focus-within .dropdown-menu{display:block}.dropdown-menu a{display:block;padding:10px 12px;border-radius:8px;color:var(--charcoal);font-weight:600}.dropdown-menu a:hover{background:var(--paper);text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:10px;padding:11px 17px;font-weight:750;cursor:pointer;text-decoration:none}.btn:hover{text-decoration:none}.btn-primary{background:var(--orange);color:#fff}.btn-primary:hover{background:var(--orange-dark)}.btn-secondary{background:var(--turquoise);color:#fff}.btn-secondary:hover{background:#0a5e61}.btn-ghost{border:1px solid var(--line);background:#fff;color:var(--charcoal)}.btn-disabled{background:#e7ebed;color:#6d777d;cursor:not-allowed}
.hero{background:linear-gradient(135deg,#f7fbfb 0%,#fff 65%,#fff8f3 100%);border-bottom:1px solid var(--line)}
.hero-inner{max-width:var(--max);margin:auto;padding:76px 20px 66px;display:grid;grid-template-columns:1.25fr .75fr;gap:52px;align-items:center}
.kicker{text-transform:uppercase;color:var(--turquoise);font-size:13px;font-weight:850;letter-spacing:1.3px}.hero h1,.page-hero h1{font-size:clamp(38px,5.3vw,66px);line-height:1.04;margin:12px 0 20px;letter-spacing:-1.8px}.hero p{font-size:20px;color:var(--slate);max-width:760px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:var(--shadow)}.hero-card h2{font-size:20px;margin-top:0}.steps{display:grid;gap:13px}.step{display:grid;grid-template-columns:40px 1fr;gap:12px;align-items:start}.step-num{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--turquoise-soft);color:var(--turquoise);font-weight:850}.step strong{display:block;margin-bottom:2px}.step span{color:var(--muted);font-size:14px}
.section{padding:64px 20px}.section.alt{background:var(--paper)}.container{max-width:var(--max);margin:auto}.section-head{max-width:820px;margin-bottom:30px}.section-head h2{font-size:clamp(28px,3.4vw,42px);line-height:1.12;margin:7px 0 12px}.section-head p{color:var(--muted);font-size:18px;margin:0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.grid.two{grid-template-columns:repeat(2,1fr)}.grid.four{grid-template-columns:repeat(4,1fr)}
.card{border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:24px;box-shadow:0 6px 18px rgba(34,49,58,.04)}.card h3{margin:0 0 9px;font-size:20px}.card p{margin:0 0 14px;color:var(--muted)}.card .meta{font-size:13px;color:var(--slate);font-weight:700}.card-link{display:inline-block;margin-top:6px;font-weight:750}
.badge{display:inline-flex;border-radius:999px;padding:5px 9px;font-size:12px;font-weight:800;background:var(--turquoise-soft);color:var(--turquoise)}.badge.orange{background:#fff1e8;color:#a74e16}.badge.gray{background:#edf1f3;color:#596772}
.weight-list{display:grid;gap:10px;margin-top:18px}.weight{display:grid;grid-template-columns:minmax(170px,1fr) 2fr 48px;gap:10px;align-items:center;font-size:14px}.bar{height:9px;background:#edf1f3;border-radius:999px;overflow:hidden}.bar i{display:block;height:100%;background:var(--turquoise);border-radius:999px}
.page-hero{background:var(--paper);border-bottom:1px solid var(--line)}.page-hero .container{padding:56px 20px}.page-hero h1{font-size:clamp(36px,4.8vw,58px);margin-bottom:14px}.page-hero p{font-size:19px;color:var(--slate);max-width:850px}
.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:10px}.breadcrumbs a{color:var(--muted)}
.notice{border-left:4px solid var(--orange);background:#fff7f0;padding:15px 18px;border-radius:8px;margin:18px 0}.notice.info{border-left-color:var(--turquoise);background:#f1f9f9}.notice strong{display:block;margin-bottom:3px}
.course-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.course-card{position:relative}.course-card .course-code{font-weight:850;color:var(--turquoise);font-size:13px;letter-spacing:.6px;text-transform:uppercase}.course-card .status{position:absolute;right:18px;top:18px}.course-card ul{padding-left:18px;color:var(--muted)}
.flow{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.flow .node{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 15px;font-weight:750}.flow .arrow{color:var(--orange);font-weight:900}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 26px}.tabs a{padding:8px 12px;border:1px solid var(--line);border-radius:9px;color:var(--charcoal);font-weight:650}.tabs a:hover{background:var(--turquoise-soft);text-decoration:none}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px}.table{width:100%;border-collapse:collapse;background:#fff}.table th,.table td{padding:13px 15px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.table th{background:#f3f6f7;font-size:13px;text-transform:uppercase;letter-spacing:.4px}.table tr:last-child td{border-bottom:0}
.callout{background:linear-gradient(120deg,var(--turquoise),#0d5f63);color:#fff;border-radius:20px;padding:34px}.callout h2{margin-top:0;font-size:34px}.callout p{color:#e4f3f3;max-width:800px}.callout .btn-primary{background:#fff;color:var(--turquoise)}
.form-shell{max-width:600px;border:1px solid var(--line);background:#fff;border-radius:16px;padding:26px;box-shadow:var(--shadow)}label{display:block;font-weight:750;margin-bottom:6px}input,select,textarea{width:100%;font:inherit;border:1px solid #bdc9ce;border-radius:9px;padding:11px 12px;margin-bottom:15px;background:#fff}input:focus,select:focus,textarea:focus{outline:3px solid rgba(18,134,138,.16);border-color:var(--turquoise)}
.mission{font-size:26px;line-height:1.45;max-width:950px}.big-rule{font-size:30px;font-weight:900;color:var(--turquoise);margin-top:22px}
.footer{background:#26343d;color:#dfe7eb;margin-top:0}.footer .container{padding:48px 20px 24px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:28px}.footer h3{color:#fff;font-size:14px;text-transform:uppercase;letter-spacing:.5px}.footer a{color:#dfe7eb;display:block;margin:7px 0;font-size:14px}.footer-brand p{color:#bfcbd1;font-size:14px}.footer-bottom{border-top:1px solid #45535d;margin-top:30px;padding-top:18px;font-size:12px;color:#aebbc2;display:flex;gap:20px;justify-content:space-between;flex-wrap:wrap}
.small{font-size:13px;color:var(--muted)}.center{text-align:center}.muted{color:var(--muted)}.mt{margin-top:24px}.mb0{margin-bottom:0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:980px){.grid.four{grid-template-columns:repeat(2,1fr)}.grid{grid-template-columns:repeat(2,1fr)}.hero-inner{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1}}
@media(max-width:760px){.nav-wrap{flex-wrap:wrap}.nav-toggle{display:block}.main-nav{display:none;width:100%;flex-direction:column;align-items:stretch;margin-left:0}.main-nav.open{display:flex}.main-nav>a,.dropbtn{text-align:left;width:100%}.dropdown-menu{position:static;width:100%;box-shadow:none;border:0;padding-left:14px}.dropdown.open .dropdown-menu{display:block}.hero-inner{padding-top:50px}.grid,.grid.two,.grid.four,.course-grid{grid-template-columns:1fr}.weight{grid-template-columns:1fr 48px}.weight .bar{grid-column:1/-1;grid-row:2}.footer-grid{grid-template-columns:1fr}.hero h1,.page-hero h1{letter-spacing:-1px}}
.learning-header{background:var(--paper);border-bottom:1px solid var(--line);padding:34px 20px}.learning-header h1{font-size:clamp(28px,4vw,44px);margin:7px 0 18px}.section-selector{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.learning-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.5fr);gap:22px;align-items:start}.learning-card,.tutor-card{border:1px solid var(--line);border-radius:18px;background:#fff;padding:clamp(20px,4vw,34px);box-shadow:var(--shadow)}.lesson-copy{font-size:19px;max-width:75ch}.answer-choice{display:flex;gap:10px;align-items:flex-start;padding:12px;border:1px solid var(--line);border-radius:10px;margin:10px 0;font-weight:600;cursor:pointer}.answer-choice input{width:auto;margin:4px 0 0}.feedback{margin-top:18px}.progress-panel{display:grid;gap:8px;max-width:760px}.progress-row{display:grid;grid-template-columns:minmax(160px,1fr) 180px;gap:10px;align-items:center;font-size:13px;color:var(--muted)}progress{width:100%;accent-color:var(--turquoise)}
@media(max-width:820px){.learning-layout{grid-template-columns:1fr}.progress-row{grid-template-columns:1fr}.tutor-card{order:-1}}

.article-shell{max-width:850px;margin:auto}.article-shell h2{margin-top:38px;font-size:28px}.article-shell h3{margin-top:28px}.article-shell p,.article-shell li{font-size:18px}.article-shell ul,.article-shell ol{padding-left:24px}.article-meta{color:var(--muted);font-size:14px;margin:8px 0 24px}.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.resource-card{border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:22px}.resource-card h2,.resource-card h3{margin-top:0}.resource-card .eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:.7px;color:var(--turquoise);font-weight:850}.source-box{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px;margin-top:30px}.source-box a{word-break:break-word}.toc{background:var(--turquoise-soft);border-radius:12px;padding:18px 22px;margin:24px 0}.toc a{display:block;margin:7px 0;font-weight:650}@media(max-width:900px){.resource-grid{grid-template-columns:1fr}}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.metric{border:1px solid var(--line);border-radius:14px;padding:18px;background:#fff}.metric span{display:block;color:var(--muted);font-size:13px}.metric strong{display:block;font-size:25px;margin-top:5px;color:var(--charcoal)}@media(max-width:900px){.metrics{grid-template-columns:repeat(2,1fr)}}@media(max-width:520px){.metrics{grid-template-columns:1fr}}