:root{
  --navy:#071a2b; --navy2:#0c2940; --panel:#102f47; --aqua:#31d7d0;
  --green:#45dc86; --amber:#ffc857; --red:#ff6b6b; --white:#f6fbff;
  --muted:#b7cad8; --line:rgba(255,255,255,.13); --shadow:0 18px 50px rgba(0,0,0,.28);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:
radial-gradient(circle at 10% 0%,rgba(49,215,208,.12),transparent 30%),
linear-gradient(180deg,var(--navy),#06131f);color:var(--white);line-height:1.65}
a{color:inherit}
.wrap{width:min(1120px,92%);margin:auto}
.topbar{position:sticky;top:0;z-index:10;background:rgba(5,19,31,.94);backdrop-filter:blur(12px);
border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:13px 0}
.brand{font-weight:800;letter-spacing:.08em}.brand span{color:var(--aqua)}
.navlinks{display:flex;flex-wrap:wrap;gap:8px}
.navlinks a,.btn{display:inline-block;text-decoration:none;border:1px solid var(--line);padding:10px 15px;
border-radius:12px;background:rgba(255,255,255,.045);font-weight:700}
.navlinks a:hover,.btn:hover{border-color:var(--aqua);transform:translateY(-1px)}
.hero{padding:72px 0 48px;border-bottom:1px solid var(--line)}
.eyebrow{color:var(--aqua);font-weight:800;letter-spacing:.15em;text-transform:uppercase;font-size:.82rem}
h1{font-size:clamp(2.15rem,6vw,4.8rem);line-height:1.03;margin:.25em 0}
h2{font-size:clamp(1.55rem,3.5vw,2.4rem);margin-top:0}
h3{margin-top:0}
.lead{font-size:1.16rem;color:var(--muted);max-width:800px}
.hero-grid,.grid-2,.grid-3{display:grid;gap:22px}
.hero-grid{grid-template-columns:1.45fr .8fr;align-items:center}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card,.status-panel,.lesson-box,.quiz-box{background:linear-gradient(145deg,rgba(16,47,71,.95),rgba(8,31,48,.96));
border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:var(--shadow)}
.hero-icon{font-size:6rem;text-align:center;filter:drop-shadow(0 15px 25px rgba(0,0,0,.4))}
.section{padding:52px 0}
.badge{display:inline-flex;gap:8px;align-items:center;padding:6px 11px;border-radius:999px;
background:rgba(49,215,208,.12);border:1px solid rgba(49,215,208,.35);color:#8ff6f1;font-size:.86rem;font-weight:700}
.stat{font-size:2rem;font-weight:900;color:var(--aqua)}
.muted{color:var(--muted)}
.btn.primary{background:var(--aqua);color:#022528;border-color:var(--aqua)}
.btn.green{background:var(--green);color:#042619;border-color:var(--green)}
.btn.amber{background:var(--amber);color:#2e2100;border-color:var(--amber)}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.steps{counter-reset:step;display:grid;gap:16px}
.step{position:relative;padding:20px 20px 20px 72px;background:rgba(255,255,255,.045);
border:1px solid var(--line);border-radius:16px}
.step:before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:38px;height:38px;
display:grid;place-items:center;border-radius:50%;background:var(--aqua);color:#03262a;font-weight:900}
.note,.warning,.success{padding:18px;border-radius:15px;border-left:5px solid;margin:20px 0}
.note{background:rgba(49,215,208,.09);border-color:var(--aqua)}
.warning{background:rgba(255,200,87,.10);border-color:var(--amber)}
.success{background:rgba(69,220,134,.10);border-color:var(--green)}
.checklist{list-style:none;padding:0}.checklist li{padding:10px 0 10px 34px;position:relative;border-bottom:1px dashed var(--line)}
.checklist li:before{content:"☐";position:absolute;left:0;color:var(--aqua);font-size:1.25rem}
.progress{height:13px;background:#06131f;border-radius:20px;overflow:hidden;border:1px solid var(--line)}
.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--aqua),var(--green));width:var(--progress,20%)}
footer{padding:35px 0;border-top:1px solid var(--line);color:var(--muted);text-align:center}
table{width:100%;border-collapse:collapse;background:rgba(255,255,255,.035)}
th,td{padding:13px;border:1px solid var(--line);text-align:left;vertical-align:top}
th{color:var(--aqua)}
.quiz-option{display:block;margin:10px 0;padding:12px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.03)}
input[type=radio]{margin-right:10px}
.result{margin-top:20px;font-size:1.1rem;font-weight:800}
.certificate{background:#fff;color:#132234;border:12px double #c79732;padding:55px;max-width:950px;margin:30px auto;
text-align:center;box-shadow:var(--shadow)}
.certificate h1{font-family:Georgia,serif;color:#183753;font-size:3.2rem}
.certificate .name{font-family:Georgia,serif;font-size:2rem;border-bottom:2px solid #c79732;display:inline-block;min-width:55%;padding:8px}
input[type=text]{width:100%;max-width:520px;padding:13px;border-radius:10px;border:1px solid #aab8c3;font-size:1rem}
.print-only{display:none}
@media(max-width:800px){
 .hero-grid,.grid-2,.grid-3{grid-template-columns:1fr}
 .nav{align-items:flex-start;flex-direction:column}
 .hero{padding-top:42px}.certificate{padding:25px 15px}.certificate h1{font-size:2.25rem}
}
@media print{
 body{background:#fff;color:#111}.topbar,.actions,footer,.no-print{display:none!important}
 .certificate{box-shadow:none;margin:0}.print-only{display:block}
 .card,.lesson-box{box-shadow:none;background:#fff;color:#111;border-color:#bbb}
}