:root{--ink:#0f1b2d;--ink2:#334155;--muted:#64748b;--line:#e5e7eb;--bg:#f6f7f9;--card:#fff;--brand:#0b3d5c;--brand2:#0e5a86;--accent:#f5a524;--accent-ink:#1b1300;--ok:#15803d;--warn:#b45309;--bad:#b91c1c;--r:14px;--sh:0 1px 2px rgba(15,27,45,.06),0 6px 24px rgba(15,27,45,.06)}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Plus Jakarta Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px}
a{color:var(--brand2);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%}h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em}h1{font-size:2rem;font-weight:800}h2{font-size:1.35rem;font-weight:700}h3{font-size:1.08rem}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}main.wrap{padding-top:28px;padding-bottom:56px;min-height:60vh}main.wide{min-height:60vh;padding-bottom:56px}
.muted{color:var(--muted)}.small{font-size:.86rem}.center{text-align:center}.nowrap{white-space:nowrap}.inline{display:inline}.grow{flex:1;min-width:0}
/* topbar */
.topbar{background:var(--brand);color:#fff;position:sticky;top:0;z-index:20}
.topbar-in{display:flex;align-items:center;gap:20px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#fff;font-size:1.08rem}.brand:hover{text-decoration:none}
.brand-mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--accent);color:var(--accent-ink);font-weight:800;font-size:.85rem}
.mainnav{margin-left:auto;display:flex;align-items:center;gap:18px}.mainnav a,.linkbtn{color:#dbe7f0;font-weight:600;font-size:.95rem}.mainnav a:hover,.linkbtn:hover{color:#fff;text-decoration:none}
.mainnav .sep{width:1px;height:22px;background:rgba(255,255,255,.2)}
.linkbtn{background:none;border:0;padding:0;cursor:pointer;font:inherit}
.navtoggle,.burger{display:none}
/* buttons */
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink)!important;border:0;border-radius:10px;padding:10px 18px;font:inherit;font-weight:700;cursor:pointer;text-decoration:none!important;line-height:1.3}
.btn:hover{filter:brightness(.96)}.btn-sm{padding:6px 12px;font-size:.88rem;border-radius:8px}.btn-lg{padding:13px 24px;font-size:1.02rem;width:100%;text-align:center}
.btn-ghost{background:#fff;color:var(--ink)!important;box-shadow:inset 0 0 0 1px var(--line)}.btn-danger{background:#fee2e2;color:var(--bad)!important}
.mainnav .btn{color:var(--accent-ink)}
/* flash */
.flash{padding:12px 16px;border-radius:10px;background:#eef6ff;margin:0 0 18px;border:1px solid #cfe3fb}.flash.ok{background:#ecfdf3;border-color:#bbf7d0;color:#14532d}.flash.err{background:#fef2f2;border-color:#fecaca;color:#7f1d1d}
main.wide>.flash{max-width:1180px;margin:18px auto}
/* hero */
.hero{background:radial-gradient(1200px 500px at 85% -10%,#1a6c9e 0,transparent 60%),linear-gradient(160deg,var(--brand) 0,#082a40 100%);color:#fff;margin:-28px calc(50% - 50vw) 0;padding:72px 20px 64px}
main.wrap .hero{margin-top:-28px}
.hero-in{max-width:1180px;margin:0 auto}.eyebrow{display:inline-block;color:var(--accent);font-weight:700;font-size:.9rem;letter-spacing:.04em;text-transform:uppercase;margin-bottom:12px}
.hero h1{font-size:clamp(2rem,4.6vw,3.3rem);max-width:780px;letter-spacing:-.02em}.lead{font-size:1.12rem;color:#cfe0ec;max-width:680px}
.search{display:flex;gap:10px;max-width:560px;margin:26px 0}.search input{flex:1;padding:13px 16px;border-radius:10px;border:0;font:inherit}
.stats{display:flex;gap:36px;flex-wrap:wrap;margin-top:28px}.stats b{display:block;font-size:1.7rem;font-weight:800}.stats span{color:#a9c3d6;font-size:.88rem}
.block{margin:48px 0}.block-head{display:flex;justify-content:space-between;align-items:baseline}
.chips{display:flex;flex-wrap:wrap;gap:10px}.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;color:var(--ink);font-weight:600}.chip span{color:var(--muted);font-weight:500;margin-left:4px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.steps>div{background:#fff;border-radius:var(--r);padding:22px;box-shadow:var(--sh)}.steps b{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:#e6f0f7;color:var(--brand);margin-bottom:10px}.steps p{color:var(--muted);margin:0}
/* cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:22px}
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden;display:flex;flex-direction:column;color:inherit;transition:transform .15s}.card:hover{transform:translateY(-3px);text-decoration:none}
.card-img,.side-img,.row-img{background:#dfe8ef center/cover no-repeat;aspect-ratio:16/9}.ph{display:grid;place-items:center;background:linear-gradient(135deg,#0e5a86,#0b3d5c)}.ph span{color:#fff;font-size:2.6rem;font-weight:800;opacity:.85}
.card-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px;flex:1}.card-body h3{margin:4px 0 0}.card-body p{margin:0}
.meta{display:flex;flex-wrap:wrap;gap:14px;color:var(--muted);font-size:.85rem}.meta.light{color:#cfe0ec;margin-top:10px}
.card-foot{margin-top:auto;padding-top:10px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.price{font-weight:800;color:var(--brand)}.price.big{font-size:1.6rem;margin:14px 0}.by{color:var(--muted);font-size:.85rem}
.tag{display:inline-block;align-self:flex-start;background:#e6f0f7;color:var(--brand);font-size:.76rem;font-weight:700;padding:3px 9px;border-radius:999px;text-transform:uppercase;letter-spacing:.03em}.tag-sm{font-size:.68rem;padding:2px 7px}.tag-ok{background:#dcfce7;color:var(--ok)}.tag-warn{background:#fef3c7;color:var(--warn)}
.empty{background:#fff;border:2px dashed var(--line);border-radius:var(--r);padding:40px;text-align:center}
.box{background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:24px;margin-bottom:22px}
.page-head{margin-bottom:22px}.row-between{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap}
.filters{display:flex;gap:10px;flex-wrap:wrap}.filters input,.filters select{padding:10px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff}
/* course page */
.course-hero{background:linear-gradient(160deg,var(--brand),#082a40);color:#fff;padding:44px 0 40px}.course-hero .tag{background:rgba(255,255,255,.14);color:#fff}.course-hero h1{font-size:clamp(1.7rem,3.4vw,2.5rem);margin-top:10px}
.course-layout{display:grid;grid-template-columns:1fr 340px;gap:28px;margin-top:-20px}.course-side .sticky{position:sticky;top:86px}.side-img{border-radius:10px}
.facts{list-style:none;padding:0;margin:18px 0 0}.facts li{display:flex;justify-content:space-between;padding:8px 0;border-top:1px solid var(--line);font-size:.92rem}
.ticks{columns:2;padding-left:0;list-style:none}.ticks li{padding-left:26px;position:relative;margin-bottom:8px;break-inside:avoid}.ticks li:before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.sec{border:1px solid var(--line);border-radius:10px;margin-bottom:12px;overflow:hidden}.sec-title{background:#f8fafc;padding:12px 16px;font-weight:700;display:flex;justify-content:space-between}
.lessons{list-style:none;margin:0;padding:0}.lessons li{border-top:1px solid var(--line)}.lessons li>a,.lessons li>span.locked{display:flex;align-items:center;gap:10px;padding:11px 16px;color:var(--ink)}.lessons li>a:hover{background:#f8fafc;text-decoration:none}
.lessons li.cur>a{background:#fff7e6;font-weight:700}.lessons li.done .li-ic{background:#dcfce7;color:var(--ok)}
.li-ic{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:#eef2f6;font-size:.75rem;flex:none}.li-t{flex:1}.lock{opacity:.5}.locked{color:var(--muted)!important}
.lessons.edit li{display:flex;align-items:center;gap:10px;padding:8px 12px}
.trainer{display:flex;gap:16px}.avatar{width:56px;height:56px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:1.4rem;font-weight:800;flex:none}
.progress{height:8px;background:#e8edf2;border-radius:99px;overflow:hidden;margin:6px 0}.progress>div{height:100%;background:linear-gradient(90deg,var(--accent),#f7c35c);border-radius:99px}
/* learn */
.learn{display:grid;grid-template-columns:330px 1fr;min-height:calc(100vh - 66px)}
.learn-side{background:#fff;border-right:1px solid var(--line);padding:20px;overflow:auto;max-height:calc(100vh - 66px);position:sticky;top:66px}.learn-side .back{display:block;font-weight:700;margin-bottom:12px}.learn-side .sec{border-radius:8px}
.learn-main{padding:32px clamp(20px,4vw,56px);max-width:960px}
.video{position:relative;aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden;margin:16px 0 22px}.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.small-video{max-width:420px}
.attach{display:inline-flex;gap:8px;align-items:center;background:#eef6ff;border:1px solid #cfe3fb;border-radius:10px;padding:12px 16px;font-weight:700;margin:12px 0 20px}
.done-note{color:var(--ok);font-weight:700}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:36px;padding-top:20px;border-top:1px solid var(--line)}.pager .btn{max-width:48%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.prose{font-size:1.02rem}.prose img{border-radius:10px}.prose pre{background:#0f1b2d;color:#e2e8f0;padding:14px;border-radius:10px;overflow:auto}.prose code{background:#eef2f6;padding:1px 6px;border-radius:5px;font-size:.92em}.prose pre code{background:none;padding:0}.prose blockquote{border-left:4px solid var(--accent);margin:0 0 1em;padding:4px 16px;color:var(--ink2);background:#fffaf0}
/* quiz */
.q{border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:0 0 14px;background:#fff}.q-t{font-weight:700;margin:0 0 10px;padding:0}
.opt{display:flex;gap:10px;align-items:flex-start;padding:9px 10px;border-radius:8px;cursor:pointer}.opt:hover{background:#f8fafc}.opt input{margin-top:5px}
.q.review ul{list-style:none;padding:0;margin:0}.q.review li{padding:7px 10px;border-radius:8px;margin-bottom:4px;background:#f8fafc}.q.review li.right{background:#dcfce7;color:#14532d;font-weight:600}.q.review li.wrong{background:#fee2e2;color:#7f1d1d}
.quiz-result{padding:18px 20px;border-radius:12px;margin:12px 0 20px}.quiz-result.pass{background:#ecfdf3;border:1px solid #bbf7d0}.quiz-result.fail{background:#fff7ed;border:1px solid #fed7aa}.quiz-result h2{margin:0}
/* forms */
.form{display:flex;flex-direction:column;gap:14px}.form.narrow{max-width:460px}
.form label{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:.92rem}
input,select,textarea{font:inherit}.form input:not([type=radio]):not([type=checkbox]),.form select,.form textarea,.add-row input,.add-row select,.sec-head input,td input,td select{padding:10px 12px;border:1px solid #d6dbe1;border-radius:10px;background:#fff;width:100%;font-weight:400}
.form textarea{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92rem}
.form label.check{flex-direction:row;align-items:center;gap:8px}.cols{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.fs{border:1px solid var(--line);border-radius:10px;padding:14px;display:flex;flex-direction:column;gap:10px}.fs legend{font-weight:700;padding:0 6px}
.optrow{flex-direction:row!important;align-items:center}.optrow input[type=radio]{width:auto;flex:none}
.add-row{display:flex;gap:8px;margin-top:10px}.add-row input{flex:1}.add-row select{width:auto}
.auth{max-width:440px;margin:30px auto}
.edit-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}
.sec-edit{border:1px solid var(--line);border-radius:10px;padding:12px;margin-bottom:14px}.sec-head{display:flex;gap:6px;align-items:center}.sec-head input{flex:1}
details summary{cursor:pointer;font-weight:700}
/* tables */
.tbl{width:100%;border-collapse:collapse;font-size:.93rem}.tbl th{text-align:left;color:var(--muted);font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;padding:8px 10px;border-bottom:1px solid var(--line)}.tbl td{padding:10px;border-bottom:1px solid var(--line);vertical-align:top}
section.box{overflow-x:auto}
.plain{list-style:none;padding:0}.plain li{padding:4px 0}
/* dashboard */
.list{display:flex;flex-direction:column;gap:14px}.row-card{display:flex;gap:18px;align-items:center;background:#fff;border-radius:var(--r);box-shadow:var(--sh);padding:14px}.row-img{width:160px;border-radius:10px;flex:none}.row-card h3{margin:0}.row-actions{display:flex;gap:8px}
/* contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.contact{display:flex;flex-direction:column;gap:4px;color:var(--ink)}.contact b{color:var(--brand)}
/* footer */
.footer{background:#08263a;color:#c4d4e0;padding:44px 0 20px}.footer a{color:#fff}.footer h4{color:#fff}.footer-in{display:grid;grid-template-columns:1.4fr 1.2fr 1fr;gap:32px}.footer .muted{color:#93abbd}.copy{border-top:1px solid rgba(255,255,255,.1);margin-top:28px;padding-top:16px;font-size:.85rem}
/* certificate */
body.bare{background:#e9edf1}.cert-wrap{padding:30px 16px}
.cert{max-width:900px;margin:0 auto;background:#fff;aspect-ratio:1.414;padding:56px 64px;border:14px solid var(--brand);outline:3px solid var(--accent);outline-offset:-26px;text-align:center;display:flex;flex-direction:column;justify-content:center;gap:6px}
.cert-brand{font-weight:800;font-size:1.1rem;display:flex;gap:10px;justify-content:center;align-items:center;color:var(--brand)}.cert-k{letter-spacing:.2em;text-transform:uppercase;color:var(--warn);font-weight:700;margin:22px 0 4px}
.cert h1{font-size:2.6rem;margin:4px 0;color:var(--ink)}.cert h2{font-size:1.5rem;color:var(--brand)}.cert-foot{display:flex;justify-content:space-around;margin-top:30px}.cert-foot div{display:flex;flex-direction:column;border-top:1px solid var(--line);padding-top:8px;min-width:160px}.cert-foot span{color:var(--muted);font-size:.8rem}
@media print{body.bare{background:#fff}.noprint{display:none}.cert-wrap{padding:0}.cert{max-width:none;width:100%}@page{size:A4 landscape;margin:10mm}}
/* responsive */
@media (max-width:980px){.course-layout,.edit-grid{grid-template-columns:1fr}.course-layout{margin-top:20px}.steps{grid-template-columns:1fr 1fr}.learn{grid-template-columns:1fr}.learn-side{position:static;max-height:none;border-right:0;border-bottom:1px solid var(--line)}.footer-in{grid-template-columns:1fr}}
@media (max-width:760px){.burger{display:block;margin-left:auto;font-size:1.5rem;cursor:pointer}.mainnav{display:none;position:absolute;top:66px;left:0;right:0;background:var(--brand);flex-direction:column;align-items:flex-start;padding:16px 20px;gap:14px}.navtoggle:checked~.mainnav{display:flex}.mainnav .sep{display:none}
.steps,.cols{grid-template-columns:1fr}.ticks{columns:1}.row-card{flex-wrap:wrap}.row-img{width:100%}.cert{padding:28px;aspect-ratio:auto}.cert h1{font-size:1.8rem}.cert-foot{flex-direction:column;gap:10px}.hero{padding:48px 20px}}
/* demo */
.demobar{background:#fff4d6;color:#5b4300;font-size:.85rem;padding:7px 20px;text-align:center;border-bottom:1px solid #f3d98b}
.demobar button{background:#fff;border:1px solid #e7c76a;border-radius:6px;padding:2px 10px;margin:0 2px;font:inherit;font-weight:700;cursor:pointer;color:#5b4300}.demobar button:hover{background:#ffe9a8}
.demo-box{border:2px solid var(--accent)}.demo-roles{display:flex;flex-direction:column;gap:10px}.demo-roles .btn span{display:block;font-weight:500;font-size:.82rem;opacity:.8;margin-top:2px}