:root{--h:#174585;--ink:#121314;--ic:#4786ea;--mist:#f3f7fd;--line:#dde6f3;--green:#17794f;--green-bg:#e5f5ec;--red:#b3261e;--red-bg:#fdecea;--amber-bg:#fff6e0;--r:12px;--shadow:0 1px 2px rgba(23,69,133,.06),0 8px 24px rgba(23,69,133,.07)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
a{color:var(--h)}
h1,h2,h3,h4{color:var(--h);line-height:1.2;letter-spacing:-.015em;margin:0 0 .5em}
h1{font-size:clamp(1.8rem,1.2rem + 2.2vw,2.8rem);font-weight:800}
h2{font-size:1.6rem;font-weight:700}h3{font-size:1.15rem;font-weight:700}h4{font-size:1rem;font-weight:700}
p{margin:0 0 1em}
.ic{color:var(--ic);flex:none;vertical-align:middle}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.narrow{max-width:640px}.center{text-align:center}.pad{padding-top:40px;padding-bottom:64px}.pad-top{padding-top:28px;padding-bottom:64px}
.muted{color:#5b6472}.small{font-size:.875rem}.mt{margin-top:16px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid var(--ic);outline-offset:2px;border-radius:4px}
[hidden]{display:none!important}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--h);color:#fff;border:2px solid var(--h);padding:11px 20px;border-radius:10px;font:inherit;font-weight:600;text-decoration:none;cursor:pointer;line-height:1.2;transition:background .15s,border-color .15s,color .15s}
.btn:hover{background:#0f3366;border-color:#0f3366}
.btn .ic{color:currentColor}
.btn-sm{padding:8px 14px;font-size:.9rem}.btn-block{display:flex;width:100%}
.btn-ghost{background:#fff;color:var(--h)}.btn-ghost:hover{background:var(--mist);color:var(--h)}
.btn-light{background:#fff;color:var(--h);border-color:#fff}.btn-light:hover{background:#e9f0fc;color:var(--h);border-color:#e9f0fc}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.7);color:#fff}.btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-danger{background:#fff;color:var(--red);border-color:#e7b5b1}.btn-danger:hover{background:var(--red-bg);border-color:var(--red)}
.btn-done{background:var(--green-bg);color:var(--green);border-color:#a8dcc2}.btn-done:hover{background:#d4eee0;border-color:#8fcfae}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.iconbtn{background:none;border:0;padding:8px;border-radius:8px;cursor:pointer;display:inline-flex;color:var(--h)}
.iconbtn:hover{background:var(--mist)}.iconbtn.danger .ic{color:var(--red)}.iconbtn[disabled]{opacity:.3;cursor:default}
.linkbtn{background:none;border:0;font:inherit;color:var(--h);cursor:pointer;padding:0;font-weight:600}.linkbtn:hover{text-decoration:underline}
.lnk{background:none;border:0;font:inherit;font-size:.85rem;color:var(--h);cursor:pointer;text-decoration:underline;padding:0}
form.inline{display:inline}
/* header */
.hdr{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand img{display:block;height:40px;width:auto}
.nav{display:flex;align-items:center;gap:20px;font-weight:600}
.nav a:not(.btn){text-decoration:none;color:var(--ink)}.nav a:not(.btn):hover{color:var(--h)}
@media(max-width:560px){.brand img{height:32px}.nav{gap:12px;font-size:.9rem}}
.flash{margin:16px 0 0;padding:12px 16px;border-radius:10px;border:1px solid;font-weight:500;word-break:break-word}
.flash.success{background:var(--green-bg);border-color:#a8dcc2;color:#0f5a39}
.flash.error{background:var(--red-bg);border-color:#f0b9b4;color:#8a1c16}
.flash.info{background:#e9f1fd;border-color:#bcd3f6;color:#173f7a}
.ftr{border-top:1px solid var(--line);background:var(--mist);padding:28px 0;font-size:.9rem}
.ftr-in{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px}
/* hero */
.hero{background:radial-gradient(900px 500px at 85% 20%,#2f6fcf 0%,rgba(47,111,207,0) 60%),linear-gradient(135deg,#123a73 0%,#174585 55%,#1d57a8 100%);color:#fff;overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:24px;padding-top:64px;padding-bottom:72px}
.hero h1{color:#fff;max-width:15ch;font-size:clamp(2rem,1.2rem + 3vw,3.4rem)}
.lead{font-size:1.15rem;max-width:52ch;color:#e4edfb}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-art{width:100%;max-width:400px;justify-self:end}
@media(max-width:820px){.hero-in{grid-template-columns:1fr;padding-top:44px;padding-bottom:48px}.hero-art{display:none}}
/* course archive */
.sec{padding-top:56px;padding-bottom:72px}
.sec-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-bottom:8px}
.sec-head h2{margin:0}
.search{display:flex;gap:8px}
.search input{padding:9px 14px;border:1.5px solid var(--line);border-radius:10px;font:inherit;min-width:0;width:230px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 26px}
.chip{padding:6px 14px;border-radius:99px;border:1.5px solid var(--line);text-decoration:none;color:var(--ink);font-weight:600;font-size:.9rem}
.chip:hover{border-color:var(--ic)}.chip.on{background:var(--h);border-color:var(--h);color:#fff}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(285px,1fr));gap:26px}
.ccard{position:relative;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow);transition:transform .18s,border-color .18s}
.ccard:hover{transform:translateY(-3px);border-color:#b9cdee}
.thumb{display:block;aspect-ratio:16/10;background:linear-gradient(135deg,#dbe8fc,#eef4fd);overflow:hidden}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.thumb-ph{display:grid;place-items:center;height:100%}.thumb-ph .ic{opacity:.5}
.badge{position:absolute;top:12px;left:12px;background:#fff;color:var(--h);font-size:.78rem;font-weight:700;padding:4px 11px;border-radius:99px;box-shadow:0 2px 8px rgba(0,0,0,.12)}
.badge.static{position:static;display:inline-block;background:var(--amber-bg);box-shadow:none}
.cbody{padding:18px 18px 16px;display:flex;flex-direction:column;gap:14px;flex:1}
.ctitle{font-size:1.2rem;font-weight:700;line-height:1.3;color:var(--h);margin:0}
.ctitle a{text-decoration:none;color:inherit}.ctitle a:hover{text-decoration:underline}
.cfoot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;padding-top:12px;border-top:1px solid var(--line)}
.more{font-weight:700;text-decoration:none;font-size:.92rem}.more:hover{text-decoration:underline}
.valid{display:inline-flex;align-items:center;gap:5px;font-size:.78rem;color:#4a5361;text-align:right}
.empty{text-align:center;padding:56px 20px;border:1.5px dashed var(--line);border-radius:14px;background:var(--mist)}
.empty h3{margin-top:10px}
/* course page */
.crumbs{display:flex;gap:10px;flex-wrap:wrap;font-size:.9rem;color:#5b6472;margin-bottom:14px}
.crumbs a{text-decoration:none;font-weight:600}.crumbs span+span:before{content:"/";margin-right:10px}
.crumbs a+span:before{content:"/";margin-right:10px}
.c-title{max-width:24ch}
.c-grid{display:grid;grid-template-columns:340px 1fr;gap:44px;align-items:start;margin-top:24px}
.aside-card{border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow);position:sticky;top:92px;display:flex;flex-direction:column;gap:14px}
.aside-img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:10px;display:block}
.aside-img.ph{display:grid;place-items:center;background:linear-gradient(135deg,#dbe8fc,#eef4fd)}
.facts{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.facts li{display:flex;gap:12px;align-items:flex-start}
.facts .ic{margin-top:3px}.facts div{display:flex;flex-direction:column;line-height:1.35}
.lbl{font-size:.8rem;color:#5b6472}.job{font-size:.9rem;color:#4a5361}
.prose{max-width:75ch}.prose img{border-radius:8px}.prose table{border-collapse:collapse;max-width:100%;display:block;overflow-x:auto}
.prose td,.prose th{border:1px solid var(--line);padding:8px 12px}
.prose iframe,.prose video{max-width:100%}.prose h2{margin-top:1.6em}.prose h3{margin-top:1.3em}
.prose blockquote{margin:1.2em 0;padding:4px 18px;border-left:4px solid var(--ic);background:var(--mist);border-radius:0 8px 8px 0}
.prose li{margin-bottom:.35em}
.curr-h{margin-top:36px}
.curr{list-style:none;margin:0;padding:0;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.curr li{display:flex;align-items:center;gap:12px;padding:14px 16px;border-top:1px solid var(--line)}.curr li:first-child{border-top:0}
.curr li:nth-child(even){background:var(--mist)}
.tag{font-style:normal;font-size:.72rem;font-weight:700;background:#e5eefc;color:var(--h);padding:2px 9px;border-radius:99px;margin-left:8px}
@media(max-width:900px){.c-grid{grid-template-columns:1fr;gap:28px}.aside-card{position:static}}
/* forms and auth */
.auth{padding:48px 20px 80px;display:flex;justify-content:center}
.auth-card{width:100%;max-width:440px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:32px;box-shadow:var(--shadow)}
.auth-card.wide{max-width:600px}
.auth-card h1{font-size:1.9rem}
.form .field{margin-bottom:18px}
label{font-weight:600;font-size:.92rem;display:block;margin-bottom:6px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=date],input[type=search],input:not([type]),select,textarea{width:100%;padding:11px 14px;border:1.5px solid #cdd8ea;border-radius:10px;font:inherit;color:var(--ink);background:#fff}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--ic);box-shadow:0 0 0 3px rgba(71,134,234,.22)}
.hint{display:block;font-size:.84rem;color:#5b6472;margin-top:6px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
@media(max-width:620px){.two{grid-template-columns:1fr}.auth-card{padding:24px 20px}}
.alert{padding:12px 16px;border-radius:10px;margin-bottom:18px;border:1px solid}
.alert ul{margin:0;padding-left:18px}
.alert.err{background:var(--red-bg);border-color:#f0b9b4;color:#8a1c16}.alert.ok{background:var(--green-bg);border-color:#a8dcc2;color:#0f5a39}
.alert.warn,.alert.info{background:var(--amber-bg);border-color:#f2d98d;color:#6b4e00}
.auth-links{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 16px;margin:22px 0 0;font-size:.92rem}
.hp{position:absolute;left:-9999px}
.linkbox{background:var(--mist);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:12px}
.linkbox span{display:block;font-weight:600;font-size:.88rem}.linkbox code,code.block{word-break:break-all;font-size:.88rem}
code.block{display:block;background:var(--mist);border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin:8px 0 14px}
fieldset{border:0;padding:0;margin:0 0 18px;min-width:0}
legend{font-weight:700;color:var(--h);padding:0;margin-bottom:10px}
.radio{display:flex;gap:12px;align-items:center;border:1.5px solid #cdd8ea;border-radius:10px;padding:12px 14px;margin-bottom:10px;cursor:pointer;font-weight:500}
.radio:has(input:checked){border-color:var(--ic);background:#f0f6ff}
input[type=radio],input[type=checkbox]{accent-color:var(--h);width:18px;height:18px;flex:none;margin:0}
.sub{margin-top:28px}
/* account */
.acc-head{margin-bottom:20px}
.tabs{display:flex;gap:6px;border-bottom:1.5px solid var(--line);margin-bottom:28px}
.tab{padding:10px 18px;text-decoration:none;color:var(--ink);font-weight:600;border-bottom:3px solid transparent;margin-bottom:-1.5px}
.tab.on{color:var(--h);border-color:var(--ic)}
.mylist{display:flex;flex-direction:column;gap:16px}
.mycourse{display:grid;grid-template-columns:150px 1fr auto;gap:20px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.my-thumb{width:150px;aspect-ratio:16/10;object-fit:cover;border-radius:10px;display:block}
.my-thumb.ph{display:grid;place-items:center;background:linear-gradient(135deg,#dbe8fc,#eef4fd)}
.my-body p{margin:0 0 6px}.my-act{display:flex;flex-direction:column;gap:8px;align-items:stretch}
.bar{height:8px;background:#e3ebf7;border-radius:99px;overflow:hidden;margin:8px 0}.bar i{display:block;height:100%;background:var(--ic);border-radius:99px}
@media(max-width:760px){.mycourse{grid-template-columns:1fr}.my-thumb{width:100%}.my-act{flex-direction:row;flex-wrap:wrap}}
.panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;margin-bottom:22px;box-shadow:var(--shadow)}
.narrow-panel{max-width:720px}
/* learning view */
.learn-body{background:#fff}
.ltop{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:16px;height:60px;padding:0 20px;background:#fff;border-bottom:1px solid var(--line)}
.ltop-title{font-weight:700;color:var(--h);flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lflash{max-width:1320px;margin:0 auto;padding:0 28px}
.learn{display:grid;grid-template-columns:340px minmax(0,1fr);gap:40px;max-width:1320px;margin:0 auto;padding:28px 28px 80px}
.l-side{position:sticky;top:84px;align-self:start;max-height:calc(100vh - 104px);overflow-y:auto;display:flex;flex-direction:column;gap:18px}
.toc-box{background:var(--mist);border:1px solid var(--line);border-radius:12px;padding:16px}
.toc-box h4{margin-bottom:8px}
.toc-lesson ul{list-style:none;margin:0;padding:0}
.toc-lesson a{display:block;padding:6px 10px;border-left:3px solid transparent;text-decoration:none;color:var(--ink);font-size:.92rem;border-radius:0 6px 6px 0}
.toc-lesson a:hover,.toc-lesson a.on{background:#e3edfc;border-left-color:var(--ic);color:var(--h)}
.ctoc{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.ci{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:9px;background:#fff;border:1px solid var(--line);text-decoration:none;color:var(--ink);font-size:.93rem;line-height:1.35}
.ci:hover{border-color:var(--ic)}
.ci.current{border-color:var(--h);box-shadow:inset 3px 0 0 var(--h);font-weight:700}
.ci.done{background:var(--green-bg);border-color:#a8dcc2;color:#0f5a39}.ci.done .ic{color:var(--green)}
.ci-ic{margin-top:1px}
.l-main{min-width:0}
.kicker{font-size:.88rem;font-weight:600;color:#5b6472;margin-bottom:4px}
.l-title{margin-bottom:24px}
.lesson-body{max-width:78ch;font-size:1.06rem;line-height:1.75}
.l-actions{display:flex;gap:12px;flex-wrap:wrap;margin:32px 0 8px}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:36px;padding-top:20px;border-top:1px solid var(--line)}
.finish{display:flex;gap:18px;align-items:flex-start;background:linear-gradient(135deg,#eaf2fe,#f6faff);border:1px solid #bcd3f6;border-radius:14px;padding:22px;margin-top:32px}
.finish h3{margin-bottom:4px}.finish p{margin-bottom:12px}
.quiz{max-width:760px}
.qbox{border:1.5px solid var(--line);border-radius:12px;padding:18px;margin-bottom:18px}
.qbox legend{display:flex;gap:10px;align-items:flex-start;font-size:1.05rem;padding:0 6px}
.qn{background:var(--h);color:#fff;border-radius:99px;min-width:26px;height:26px;display:inline-grid;place-items:center;font-size:.82rem}
.qbox.q-ok{border-color:#a8dcc2}.qbox.q-bad{border-color:#f0b9b4}
.opt{display:flex;gap:12px;align-items:flex-start;padding:11px 14px;border:1.5px solid #cdd8ea;border-radius:10px;margin-bottom:8px;cursor:pointer;font-weight:500}
.opt:hover{border-color:var(--ic)}.opt:has(input:checked){border-color:var(--ic);background:#f0f6ff}
.opt.is-correct{background:var(--green-bg);border-color:#7fc9a3}.opt.is-wrong{background:var(--red-bg);border-color:#ee9d96}
fieldset:disabled .opt{cursor:default}
.result{padding:16px 18px;border-radius:12px;margin-bottom:22px;border:1px solid;display:flex;flex-direction:column;gap:2px}
.result.pass{background:var(--green-bg);border-color:#a8dcc2;color:#0f5a39}.result.fail{background:var(--amber-bg);border-color:#f2d98d;color:#6b4e00}
.side-head{display:flex;justify-content:space-between;align-items:center}
.only-m,.mob-only{display:none}
.scrim{position:fixed;inset:0;background:rgba(10,25,50,.45);z-index:50;opacity:0;pointer-events:none;transition:opacity .2s}
.scrim.show{opacity:1;pointer-events:auto}
@media(max-width:991px){
  .learn{grid-template-columns:1fr;padding:18px 16px 60px;gap:0}
  .lflash{padding:0 16px}
  .only-m{display:inline-flex}.mob-only{display:block;margin-bottom:18px}.desk-only{display:none!important}
  .side-head.only-m{display:flex}
  .l-side{position:fixed;top:0;left:0;bottom:0;width:min(88vw,350px);max-height:none;background:#fff;z-index:60;padding:16px;transform:translateX(-105%);transition:transform .25s;box-shadow:6px 0 30px rgba(0,0,0,.2)}
  .l-side.open{transform:none}
  .ltop .btn span{display:none}.ltop-title{font-size:.95rem}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
/* certificate */
body.bare{background:#eef3fb}
.cert-bar{background:#fff;border-bottom:1px solid var(--line)}
.cert-bar-in{max-width:1180px;margin:0 auto;padding:14px 20px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center}
.cert-status{display:flex;gap:8px;align-items:center;font-weight:600}.cert-status.okc{color:var(--green)}.cert-status.okc .ic{color:var(--green)}.cert-status.exp{color:var(--red)}.cert-status.exp .ic{color:var(--red)}
.cert-actions{display:flex;flex-wrap:wrap;gap:10px}
.cert-stage{max-width:1123px;margin:28px auto 0;padding:0 20px;overflow:hidden}
.cert-scale{transform-origin:top left;width:1123px}
.cert-note{text-align:center;color:#5b6472;font-size:.9rem;margin:22px 20px 40px}
.cert{width:1123px;height:794px;position:relative;background:#fff;overflow:hidden;color:var(--ink);box-shadow:0 10px 40px rgba(23,69,133,.18)}
.cert-frame{position:absolute;inset:20px;border:3px solid var(--h);box-shadow:inset 0 0 0 7px #fff,inset 0 0 0 9px var(--ic)}
.cert-rings{position:absolute;width:640px;height:640px;right:-150px;bottom:-210px;opacity:.07}
.cert-inner{position:absolute;inset:20px;padding:40px 80px 40px;display:flex;flex-direction:column;align-items:center;text-align:center}
.cert-logo{height:64px;width:auto}
.cert-title{font-size:46px;font-weight:800;margin:26px 0 22px;color:var(--h)}
.cert-line{font-size:19px;margin:0;color:#3b4350}
.cert-name{font-size:54px;font-weight:800;color:var(--h);margin:12px 0 0;line-height:1.15;padding:0 30px 6px;border-bottom:2px solid var(--ic);max-width:100%}
.cert-gmc{font-size:17px;margin:10px 0 18px;color:#3b4350;font-weight:600}
.cert-course{font-size:32px;font-weight:700;margin:10px 0 0;line-height:1.25;color:var(--ink);max-width:90%}
.cert-foot{margin-top:auto;width:100%;display:grid;grid-template-columns:1fr 1.25fr 1fr;align-items:end;gap:20px;text-align:left}
.cert-dates div{margin-top:10px}.cert-dates span,.cert-serial span{display:block;font-size:13px;color:#5b6472}.cert-dates strong{font-size:18px;color:var(--ink)}
.cert-serial{text-align:center}.cert-serial strong{display:block;font-size:17px;color:var(--h);letter-spacing:.04em}.cert-serial small{display:block;font-size:11px;color:#5b6472;margin-top:6px;word-break:break-all}
.cert-sign{text-align:center;display:flex;flex-direction:column;align-items:center}
.cert-sign img{height:70px;width:auto;max-width:200px;object-fit:contain}.sig-space{height:70px}
.sig-line{width:220px;border-top:2px solid var(--ink);margin:4px 0 6px}
.cert-sign strong{font-size:17px}.cert-sign span{font-size:14px;color:#3b4350}
@media print{
  @page{size:1123px 794px;margin:0}
  body *{visibility:hidden}
  #cert,#cert *{visibility:visible}
  body.bare{background:#fff}
  .cert-stage{position:absolute;left:0;top:0;margin:0;padding:0;overflow:visible;max-width:none}
  .cert-scale{transform:none!important}
  .cert{box-shadow:none}
}
.err-code{font-size:5rem;font-weight:800;color:var(--ic);margin:0;line-height:1}
.lesson-body h2,.lesson-body h3{scroll-margin-top:84px}
@media print{.cert-stage{height:auto!important}}