:root{color-scheme:dark;--deep:#061421;--panel:#0c293b;--line:#355d75;--text:#eef6f7;--muted:#a6bfcb;--cyan:#6fe1ec;--gold:#dfb970}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 80% 0,#16465d,transparent 42%),var(--deep);color:var(--text);font:15px/1.6 Inter,Arial,sans-serif}a{color:var(--cyan)}button{font:inherit;cursor:pointer}.skip{position:absolute;left:-9999px}.skip:focus{left:10px;top:10px;background:white;color:black;padding:8px;z-index:5}header{min-height:76px;padding:14px clamp(20px,5vw,70px);display:flex;align-items:center;gap:22px;border-bottom:1px solid var(--line);background:#061522e8}header img{width:164px;max-height:45px;object-fit:contain}header span{font-weight:800;letter-spacing:.2em;color:var(--gold);font-size:11px}header a:last-child{margin-left:auto;text-decoration:none;font-size:13px}main{max-width:1500px;margin:auto;padding:55px clamp(20px,5vw,70px) 100px}.eyebrow{letter-spacing:.28em;font-size:11px;color:var(--cyan);font-weight:800}h1,h2,h3{font-family:Impact,'Arial Narrow',sans-serif;text-transform:uppercase;line-height:1}h1{font-size:clamp(4rem,8vw,8rem);margin:12px 0 20px}h2{font-size:2.1rem;margin:0 0 22px}h3{font-size:1.45rem}.intro,#gate{color:var(--muted)}.layout{display:grid;grid-template-columns:minmax(260px,350px) minmax(0,1fr);gap:24px;margin-top:35px}.panel{background:var(--panel);border:1px solid var(--line);padding:26px;min-width:0}.panel aside{width:100%}.course-link,.lesson-link{display:block;padding:11px 0;border-top:1px solid var(--line);text-decoration:none}.course-link strong{display:block;color:var(--text)}.course-link small,.chapter small{color:var(--muted)}.chapter{border-top:1px solid var(--line);padding:14px 0}.chapter h3{margin:0 0 10px}.lesson-link[aria-current=page]{color:var(--gold);font-weight:800}.lesson-panel h2{font-size:clamp(2.6rem,5vw,5rem)}.lesson-body{white-space:pre-wrap;color:#d5e4e9;font-size:1.07rem;max-width:800px}.video{aspect-ratio:16/9;width:100%;border:1px solid var(--line);background:#000}.primary{background:var(--gold);color:#071522;border:0;padding:13px 20px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;margin-top:30px}.primary:disabled{opacity:.55;cursor:default}.message{color:var(--muted)}@media(max-width:850px){.layout{grid-template-columns:1fr}.panel{padding:20px}header span{display:none}}
.quiz{display:grid;gap:18px;margin-top:20px}.quiz fieldset{border:1px solid var(--line);padding:18px;min-width:0}.quiz legend{font-weight:800;padding:0 8px}.quiz label{display:flex;align-items:flex-start;gap:10px;padding:8px 2px;cursor:pointer}.quiz input{accent-color:var(--gold);margin-top:5px}.quiz label:focus-within{outline:2px solid var(--cyan);outline-offset:2px}
.lesson-locked{color:var(--muted);cursor:default}

[hidden]{display:none!important}a,button{touch-action:manipulation}a:focus-visible,button:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}.panel,.message,#gate{overflow-wrap:anywhere}.course-link[aria-current=page]{color:var(--gold);font-weight:800}.course-link,.lesson-link{min-height:44px}.primary{max-width:100%;white-space:normal}#gate .primary{margin:10px 16px 10px 0}@media(max-width:400px){header{gap:12px;padding:14px 16px}header img{width:145px}main{padding-left:16px;padding-right:16px}}

header nav{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin-left:auto}header nav a{min-height:44px;display:inline-flex;align-items:center;text-decoration:none;font-size:13px}header nav a:last-child{margin-left:0}@media(max-width:600px){header{flex-wrap:wrap}header nav{width:100%;margin-left:0;gap:22px}header nav a{font-size:14px}}

/* Course learning retains its real player/navigation, in the account storyboard's design language. */
body{background:radial-gradient(ellipse at 75% 0,#12446a4d,transparent 52%),#031729;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}header{background:#021528eb;border-bottom-color:#29495e}header span{font-size:9px;color:#9fc2d7;letter-spacing:.16em}header nav a{color:#d8e9f4}main{max-width:1380px;padding-top:38px}h1,h2,h3{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;text-transform:none;letter-spacing:-.04em;line-height:1.15}h1{font-size:clamp(35px,6vw,56px);margin:13px 0 15px}h2{font-size:24px;font-weight:750}h3{font-size:17px;letter-spacing:-.025em}.eyebrow{font-size:9px;color:#9ac1d5;letter-spacing:.17em}.intro{font-size:14px}.layout{grid-template-columns:minmax(245px,300px) minmax(0,1fr);gap:24px;margin-top:28px}.panel{background:linear-gradient(135deg,#0e2c43,#061e34);border-color:#35536b;border-radius:14px;box-shadow:0 15px 40px #0001}.lesson-panel{padding:30px}.lesson-panel h2{font-size:clamp(25px,3vw,37px);line-height:1.14}.course-link,.lesson-link{border:0;border-radius:8px;margin:3px 0;padding:12px;color:#b3d3e3}.course-link:hover,.lesson-link:hover{background:#17394e}.course-link[aria-current=page],.lesson-link[aria-current=page]{background:#153a50;color:#baf7fc;box-shadow:inset 3px 0 #4bdded}.course-link strong{font-weight:700;font-size:14px}.course-link small{font-size:11px}.chapter{border-top-color:#345469;margin-top:12px}#course-list+h2{margin-top:26px}.chapter h3{font-size:15px;margin:7px 0 12px;line-height:1.35}.lesson-body{font-size:15px;line-height:1.75;color:#d7e6ef}.video{border:1px solid #7d9db0;border-radius:12px;overflow:hidden}.primary{background:linear-gradient(110deg,#36e8e9,#66edf5);border:1px solid #72eef5;border-radius:9px;color:#021c28;min-height:48px;padding:12px 20px;font-size:14px;line-height:1.5;text-transform:none;letter-spacing:-.015em}.primary:hover:not(:disabled){background:#8bf4fa}.primary:disabled{background:#19374c;border-color:#4c6b81;color:#a9c3d2;opacity:1}.quiz fieldset{border-radius:10px;border-color:#496c82;background:#09243b}.quiz legend{font-size:14px}.quiz label{border-radius:7px;padding:12px 7px;line-height:1.55}.quiz input{accent-color:#4ddbe7}.quiz label:has(input:checked){background:#173c50}.lesson-locked{padding:10px 12px;font-size:13px}.message,#gate{line-height:1.65;font-size:14px;color:#afcada}@media(max-width:850px){.layout{grid-template-columns:1fr}.panel{padding:22px}.lesson-panel h2{font-size:29px}main{padding-top:30px}.video{border-radius:10px}}@media(max-width:600px){header{gap:15px;padding:17px 20px}header nav{gap:22px}header nav a{font-size:12px}main{padding:29px 20px 65px}h1{font-size:36px}.panel{border-radius:11px;padding:20px}.primary{width:100%;margin-top:22px}.lesson-panel h2{font-size:27px}.layout{gap:18px}.course-link,.lesson-link{min-height:48px}.lesson-body{font-size:14px}.quiz fieldset{padding:16px 13px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}@media(forced-colors:active){.panel,.video,.primary,.quiz fieldset{border:1px solid CanvasText}.course-link[aria-current=page],.lesson-link[aria-current=page]{outline:2px solid Highlight}}