:root{--bg:#07131d;
--surface:#0d1d2a;--surface-2:#112738;--text:#eaf5f6;--muted:#9ab1bd;--accent:#38f2a2;--accent-deep:#0fa66a;--line:rgba(148,183,196,.18);--shadow:0 18px 45px rgba(0,0,0,.24)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;background:radial-gradient(circle at 15% -10%,#134558 0,transparent 28rem),var(--bg);color:var(--text);font-family:Poppins,Arial,sans-serif;line-height:1.6}a{color:inherit}button,input,textarea{font:inherit}.site-header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:rgba(7,19,29,.88);backdrop-filter:blur(16px)}.nav{width:min(1160px,92%);min-height:76px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}.logo{color:var(--accent);font-size:1.55rem;font-weight:700;letter-spacing:-.06em;text-decoration:none}.logo span{color:var(--text)}.nav-links{display:flex;align-items:center;gap:22px;list-style:none;margin:0;padding:0}.nav-links a{color:var(--muted);font-size:.9rem;font-weight:600;text-decoration:none;transition:color .2s}.nav-links a:hover,.nav-links a.active{color:var(--accent)}.nav-cta{padding:8px 15px;color:#042015!important;background:var(--accent);border-radius:8px}.menu-button{display:none;padding:8px 11px;color:var(--text);background:transparent;border:1px solid var(--line);border-radius:8px;cursor:pointer}.container{width:min(1160px,92%);margin:0 auto}.hero{padding:92px 0 68px;text-align:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;color:var(--accent);font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase}.eyebrow:before{content:'';width:22px;height:1px;background:currentColor}h1,h2,h3,p{margin-top:0}h1{max-width:850px;margin:0 auto 18px;font-size:clamp(2.45rem,6vw,4.6rem);line-height:1.08;letter-spacing:-.055em}h2{font-size:clamp(1.6rem,3vw,2.35rem);line-height:1.18;letter-spacing:-.035em}h3{font-size:1.08rem}.hero-copy,.lead{max-width:700px;margin:0 auto;color:var(--muted);font-size:1.05rem}.hero-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:30px}.button{display:inline-flex;justify-content:center;align-items:center;min-height:45px;padding:10px 19px;border:1px solid var(--accent);border-radius:8px;color:#062219;background:var(--accent);font-weight:700;text-decoration:none;cursor:pointer;transition:transform .2s,box-shadow .2s}.button:hover{transform:translateY(-2px);box-shadow:0 9px 24px rgba(56,242,162,.18)}.button.secondary{color:var(--text);background:transparent;border-color:var(--line)}.button.small{min-height:38px;padding:7px 13px;font-size:.82rem}.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;overflow:hidden;background:var(--line);border:1px solid var(--line);border-radius:14px}.metric{padding:21px;background:var(--surface);text-align:center}.metric strong{display:block;color:var(--accent);font-size:1.5rem}.metric span{color:var(--muted);font-size:.83rem}.section{padding:78px 0}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}.section-heading p{max-width:520px;margin:0;color:var(--muted)}.grid{display:grid;gap:20px}.grid.three{grid-template-columns:repeat(3,1fr)}.grid.two{grid-template-columns:repeat(2,1fr)}.card{padding:26px;background:linear-gradient(145deg,rgba(17,39,56,.98),rgba(10,27,40,.98));border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.card:hover{border-color:rgba(56,242,162,.35)}.card-icon{display:grid;place-items:center;width:44px;height:44px;margin-bottom:20px;color:var(--accent);background:rgba(56,242,162,.1);border-radius:10px;font-size:1.25rem}.card p{color:var(--muted)}.card .button{margin-top:10px}.course-card{position:relative;overflow:hidden}.course-card:after{content:attr(data-level);position:absolute;top:20px;right:20px;padding:4px 9px;color:var(--accent);background:rgba(56,242,162,.1);border-radius:99px;font-size:.7rem;font-weight:700}.course-card p{min-height:51px}.course-meta{display:flex;gap:14px;margin:17px 0;color:var(--muted);font-size:.82rem}.progress{height:8px;overflow:hidden;margin:14px 0 5px;background:#06111a;border-radius:99px}.progress>span{display:block;height:100%;width:var(--progress,0%);background:linear-gradient(90deg,var(--accent-deep),var(--accent));border-radius:inherit}.page-hero{padding:72px 0 42px}.page-hero h1{max-width:none;margin-left:0;font-size:clamp(2.2rem,5vw,3.8rem);text-align:left}.page-hero .lead{margin-left:0;text-align:left}.course-layout{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(260px,.75fr);gap:28px;padding-bottom:66px}.lesson{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:19px 20px;margin-bottom:12px;background:var(--surface);border:1px solid var(--line);border-radius:11px}.lesson h3{margin-bottom:4px}.lesson p{margin:0;color:var(--muted);font-size:.88rem}.lesson-number{color:var(--accent);font-size:.76rem;font-weight:700}.sidebar-card{margin-bottom:16px}.sidebar-card ul{margin:0;padding-left:18px;color:var(--muted)}.sidebar-card li+li{margin-top:7px}.tag{display:inline-block;padding:5px 9px;margin:3px 2px 3px 0;color:var(--accent);background:rgba(56,242,162,.1);border-radius:99px;font-size:.75rem;font-weight:600}.filter-bar{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:24px}.filter{padding:8px 13px;color:var(--muted);background:transparent;border:1px solid var(--line);border-radius:99px;cursor:pointer}.filter.active,.filter:hover{color:#062219;background:var(--accent);border-color:var(--accent)}.challenge{display:flex;justify-content:space-between;gap:20px;align-items:center}.challenge small,.muted{color:var(--muted)}.score{color:var(--accent);font-weight:700}.table{width:100%;overflow:hidden;border:1px solid var(--line);border-radius:12px;border-collapse:separate;border-spacing:0}.table th,.table td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line)}.table th{color:var(--muted);background:var(--surface);font-size:.76rem;letter-spacing:.05em;text-transform:uppercase}.table tr:last-child td{border-bottom:0}.rank{color:var(--accent);font-weight:700}.profile-grid{display:grid;grid-template-columns:280px 1fr;gap:24px;padding-bottom:70px}.avatar{display:grid;place-items:center;width:76px;height:76px;margin-bottom:16px;color:var(--accent);background:#123648;border:2px solid var(--accent);border-radius:50%;font-size:1.8rem;font-weight:700}.form-card{max-width:580px;margin:0 auto 70px}.field{display:grid;gap:7px;margin-bottom:17px;color:var(--muted);font-size:.9rem}.field input,.field textarea{width:100%;padding:12px 13px;color:var(--text);background:#081721;border:1px solid var(--line);border-radius:8px;outline:none}.field input:focus,.field textarea:focus{border-color:var(--accent)}.form-note{margin-top:16px;color:var(--muted);font-size:.82rem}.contact-details{display:grid;gap:14px}.contact-details a{color:var(--accent)}.toast{position:fixed;right:22px;bottom:22px;z-index:50;max-width:340px;padding:14px 17px;color:#062219;background:var(--accent);border-radius:9px;box-shadow:var(--shadow);transform:translateY(110px);opacity:0;transition:.25s}.toast.show{transform:translateY(0);opacity:1}.site-footer{margin-top:40px;padding:30px 4%;color:var(--muted);border-top:1px solid var(--line);text-align:center;font-size:.85rem}@media(max-width:820px){.menu-button{display:block}.nav-links{position:absolute;top:76px;left:0;right:0;display:none;padding:15px 4%;background:#091821;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:3px}.nav-links.open{display:flex}.nav-links a{display:block;padding:10px 0}.nav-cta{padding:10px!important;text-align:center}.metrics,.grid.three{grid-template-columns:repeat(2,1fr)}.course-layout,.profile-grid{grid-template-columns:1fr}.section-heading{display:block}.section-heading h2{margin-bottom:10px}}@media(max-width:560px){.hero{padding-top:65px}.metrics,.grid.two,.grid.three{grid-template-columns:1fr}.lesson,.challenge{align-items:flex-start;flex-direction:column}.lesson .button,.challenge .button{width:100%}.table{display:block;overflow-x:auto}}