/* AI University of Bangladesh — design system */
:root{
  --bg:#ffffff; --soft:#f5f7fb; --soft2:#eef1f8; --card:#ffffff;
  --ink:#0b1430; --txt:#1c2440; --mut:#5b6382; --faint:#8b92ad;
  --line:#e4e8f1; --line2:#d6dbe8;
  --brand:#0050ed; --brand2:#0090db; --brand-ink:#0040b8; --brand-soft:#e9f1ff;
  --gold:#b98a2f; --gold-soft:#fbf5e8; --green:#12936a; --green-soft:#e8f7f0; --red:#d63c3c;
  --navy:#011835; --navy2:#0d2a5e;
  --shadow-sm:0 1px 2px rgba(16,24,64,.06),0 1px 3px rgba(16,24,64,.05);
  --shadow:0 12px 32px rgba(16,24,64,.08),0 2px 6px rgba(16,24,64,.04);
  --shadow-lg:0 30px 70px rgba(16,24,64,.14);
  --r:16px; --r-lg:24px;
  --serif:'Fraunces','Noto Serif Bengali',Georgia,serif;
  --sans:'Inter','Hind Siliguri',system-ui,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#080c1a; --soft:#0d1326; --soft2:#121a33; --card:#0f162c;
  --ink:#f1f3fb; --txt:#d9deee; --mut:#98a0bf; --faint:#6c7494;
  --line:#1e2745; --line2:#29335a;
  --brand:#5e97ff; --brand2:#38d3f5; --brand-ink:#9dbdff; --brand-soft:#0e1e42;
  --gold:#e3b75e; --gold-soft:#2a2414; --green:#3ddc97; --green-soft:#11291f;
  --shadow-sm:0 1px 2px rgba(0,0,0,.4); --shadow:0 12px 32px rgba(0,0,0,.35); --shadow-lg:0 30px 70px rgba(0,0,0,.5);
  color-scheme:dark;
}}
:root[data-theme="dark"]{
  --bg:#080c1a; --soft:#0d1326; --soft2:#121a33; --card:#0f162c;
  --ink:#f1f3fb; --txt:#d9deee; --mut:#98a0bf; --faint:#6c7494;
  --line:#1e2745; --line2:#29335a;
  --brand:#5e97ff; --brand2:#38d3f5; --brand-ink:#9dbdff; --brand-soft:#0e1e42;
  --gold:#e3b75e; --gold-soft:#2a2414; --green:#3ddc97; --green-soft:#11291f;
  --shadow-sm:0 1px 2px rgba(0,0,0,.4); --shadow:0 12px 32px rgba(0,0,0,.35); --shadow-lg:0 30px 70px rgba(0,0,0,.5);
  color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);background:var(--bg);color:var(--txt);line-height:1.65;font-size:16px;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img,svg{display:block}
button,input,select{font:inherit;color:inherit}
::selection{background:var(--brand);color:#fff}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:var(--serif);color:var(--ink);font-weight:600;line-height:1.2}
h1{font-size:clamp(2.2rem,5vw,3.8rem);letter-spacing:-.01em}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem)}
h3{font-size:1.15rem}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:'Inter',sans-serif;font-size:12.5px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--brand)}
.eyebrow::before{content:"";width:28px;height:2px;background:currentColor;border-radius:2px}
.lead{font-size:1.1rem;color:var(--mut);max-width:640px}
.muted{color:var(--mut)}
.i{width:20px;height:20px;stroke-width:1.8;flex:none}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:12px;border:1px solid transparent;font-weight:600;font-size:15px;cursor:pointer;transition:background .2s,transform .2s,box-shadow .2s,border-color .2s;white-space:nowrap}
.btn .i{width:18px;height:18px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px color-mix(in srgb,var(--brand) 30%,transparent)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 28px color-mix(in srgb,var(--brand) 38%,transparent)}
.btn-ghost{background:var(--card);border-color:var(--line2);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px}
.btn-block{width:100%}

/* header */
.topbar{background:var(--navy);color:#c9cfe6;font-size:13px}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:38px;gap:16px}
.topbar a{color:#fff;opacity:.85}.topbar a:hover{opacity:1}
.topbar .tb-links{display:flex;gap:22px}
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;height:72px;gap:28px}
.logo{display:flex;align-items:center;gap:12px;flex:none}
.logo-mark{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(140deg,#5b63f5,#0ea5c6);color:#fff;box-shadow:0 6px 16px rgba(79,70,229,.3)}
.logo-mark .i{width:24px;height:24px}
.logo b{display:block;font-family:'Inter',sans-serif;font-weight:800;font-size:15.5px;letter-spacing:.06em;color:var(--ink);line-height:1.1}
.logo small{display:block;font-family:'Inter',sans-serif;font-size:9.5px;font-weight:600;letter-spacing:.34em;color:var(--mut)}
.nav{display:flex;gap:4px;margin-left:8px}
.nav a{padding:8px 14px;border-radius:9px;font-size:15px;font-weight:500;color:var(--mut);transition:.2s}
.nav a:hover{color:var(--ink);background:var(--soft)}
.nav a.active{color:var(--brand);background:var(--brand-soft)}
.h-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{width:42px;height:42px;border-radius:11px;border:1px solid var(--line2);background:var(--card);display:grid;place-items:center;cursor:pointer;color:var(--mut);transition:.2s}
.icon-btn:hover{color:var(--ink);border-color:var(--faint)}
.menu-btn{display:none}
.mobile-nav{display:none;border-top:1px solid var(--line);padding:10px 24px 18px;background:var(--bg)}
.mobile-nav a{display:block;padding:12px 4px;border-bottom:1px solid var(--line);font-weight:500}
.mobile-nav.open{display:block}

/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:
  radial-gradient(900px 500px at 85% -10%,color-mix(in srgb,var(--brand) 12%,transparent),transparent 70%),
  radial-gradient(700px 400px at 0% 110%,color-mix(in srgb,var(--brand2) 10%,transparent),transparent 70%),var(--bg)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(ellipse 60% 70% at 70% 30%,#000 10%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse 60% 70% at 70% 30%,#000 10%,transparent 75%);opacity:.6;pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;padding-top:84px;padding-bottom:84px}
.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 14px 7px 8px;border-radius:999px;background:var(--card);border:1px solid var(--line2);font-size:13.5px;font-weight:500;color:var(--txt);box-shadow:var(--shadow-sm)}
.badge em{font-style:normal;font-size:11.5px;font-weight:700;letter-spacing:.06em;padding:3px 9px;border-radius:999px;background:var(--brand);color:#fff}
.hero h1{margin:22px 0 18px}
.hero h1 .hl{color:var(--brand)}
.search{display:flex;align-items:center;gap:10px;margin-top:30px;max-width:580px;padding:7px 7px 7px 18px;border-radius:14px;background:var(--card);border:1px solid var(--line2);box-shadow:var(--shadow)}
.search:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 14%,transparent),var(--shadow)}
.search .i{color:var(--faint)}
.search input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:16px;height:44px}
.quick{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;font-size:13.5px;color:var(--mut);align-items:center}
.quick a{padding:5px 12px;border-radius:999px;border:1px solid var(--line2);background:var(--card);transition:.2s}
.quick a:hover{border-color:var(--brand);color:var(--brand)}
.hero-stats{display:flex;gap:40px;margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}
.hero-stats b{display:block;font-family:var(--serif);font-size:2rem;font-weight:600;color:var(--ink);line-height:1.1}
.hero-stats span{font-size:13.5px;color:var(--mut)}

/* hero visual */
.hero-visual{position:relative;height:500px}
.hv-card{position:absolute;background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-lg)}
.hv-main{inset:30px 20px 60px 40px;overflow:hidden}
.hv-thumb{height:46%;display:grid;place-items:center;color:#fff;position:relative}
.hv-thumb .i{width:64px;height:64px;stroke-width:1.4}
.hv-body{padding:20px 22px}
.hv-body .tag{font-size:12px}
.hv-body h3{margin:8px 0 4px;font-size:1.25rem}
.hv-prog{height:8px;border-radius:8px;background:var(--soft2);margin-top:16px;overflow:hidden}
.hv-prog i{display:block;height:100%;width:68%;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:8px}
.hv-float{padding:14px 16px;display:flex;align-items:center;gap:12px;font-size:14px;font-weight:600;color:var(--ink);animation:float 6s ease-in-out infinite}
.hv-float small{display:block;font-weight:500;color:var(--mut);font-size:12px}
.hv-f1{top:0;right:0}
.hv-f2{bottom:70px;left:0;animation-delay:-3s}
.hv-f3{bottom:0;right:30px;animation-delay:-1.5s}
.dot-ic{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;flex:none}
@keyframes float{50%{transform:translateY(-10px)}}

/* trust strip */
.strip{background:var(--soft);border-bottom:1px solid var(--line)}
.strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding-top:26px;padding-bottom:26px}
.strip div{display:flex;align-items:center;gap:12px;font-size:14.5px;font-weight:600;color:var(--ink)}
.strip small{display:block;font-weight:400;color:var(--mut);font-size:13px}
.strip .i{color:var(--brand);width:26px;height:26px}

/* sections */
.section{padding:96px 0}
.section.alt{background:var(--soft);border-block:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px}
.sec-head h2{margin-top:12px}
.sec-head p{margin-top:10px}

/* schools */
.schools{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.school{position:relative;padding:30px 26px;border-radius:var(--r-lg);background:var(--card);border:1px solid var(--line);transition:.25s;overflow:hidden}
.school::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--c)}
.school:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.school .num{font-family:'Inter';font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--faint)}
.ic-tile{width:56px;height:56px;border-radius:15px;display:grid;place-items:center;background:color-mix(in srgb,var(--c) 12%,transparent);color:var(--c);margin:22px 0 18px}
.ic-tile .i{width:28px;height:28px}
.school h3{font-family:'Inter',sans-serif;font-weight:700;font-size:1.2rem}
.school p{font-size:14.5px;color:var(--mut);margin-top:6px}
.school .more{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14px;font-weight:600;color:var(--c)}
.school .more .i{width:16px;height:16px}

/* faculties */
.facs{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.fac{display:flex;align-items:center;gap:16px;padding:18px 20px;border-radius:var(--r);background:var(--card);border:1px solid var(--line);transition:.2s}
.fac:hover{border-color:var(--brand);box-shadow:var(--shadow-sm)}
.fac .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);flex:none}
.fac b{display:block;font-size:15.5px;color:var(--ink);font-weight:600;line-height:1.35}
.fac small{font-size:12.5px;color:var(--faint);font-family:'Inter',sans-serif}
.fac .cnt{margin-left:auto;font-size:13px;color:var(--mut);white-space:nowrap}

/* course cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:22px}
.ccard{display:flex;flex-direction:column;border-radius:var(--r-lg);background:var(--card);border:1px solid var(--line);overflow:hidden;transition:.25s}
.ccard:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line2)}
.thumb{position:relative;aspect-ratio:16/9;display:grid;place-items:center;color:#fff;overflow:hidden}
.thumb::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 0%,rgba(255,255,255,.28),transparent 55%)}
.thumb>.i{width:54px;height:54px;stroke-width:1.4;position:relative;z-index:1}
.pill .i{width:13px;height:13px}
.thumb .pill{position:absolute;top:12px;left:12px;z-index:2}
.pill{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:999px;font-size:11.5px;font-weight:700;letter-spacing:.02em;background:rgba(255,255,255,.92);color:#0b1430}
.pill.free{background:var(--green-soft);color:var(--green)}
.pill.pre{background:var(--gold-soft);color:var(--gold)}
.pill.cur{background:#fde9f3;color:#be185d}
.ccard .body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.ccard .fac-l{font-size:12.5px;color:var(--brand);font-weight:600}
.ccard h3{font-family:var(--sans);font-weight:700;font-size:1.08rem;margin:6px 0 4px;line-height:1.4}
.ccard .en{font-size:13px;color:var(--faint);font-family:'Inter',sans-serif}
.ccard .meta{display:flex;gap:14px;flex-wrap:wrap;margin-top:auto;padding-top:16px;font-size:13px;color:var(--mut);border-top:1px solid var(--line)}
.ccard .meta span{display:inline-flex;align-items:center;gap:5px}
.ccard .meta .i{width:15px;height:15px}
.ccard .row2{display:flex;justify-content:space-between;align-items:center;margin:12px 0 0}
.ai-tag{display:inline-flex;align-items:center;gap:5px;font-size:12px;color:var(--green);font-weight:600}
.ai-tag .i{width:14px;height:14px}

/* engine steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative;counter-reset:s}
.steps::before{content:"";position:absolute;top:34px;left:10%;right:10%;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand2))}
.step{text-align:center;padding:0 12px;position:relative}
.step .ic{width:68px;height:68px;margin:0 auto 18px;border-radius:20px;display:grid;place-items:center;background:var(--card);border:1px solid var(--line2);color:var(--brand);box-shadow:var(--shadow-sm);position:relative}
.step .ic .i{width:30px;height:30px}
.step h4{font-family:'Inter',sans-serif;font-size:15px;color:var(--ink)}
.step p{font-size:13.5px;color:var(--mut);margin-top:4px}
.step.review .ic{color:var(--green);border-color:color-mix(in srgb,var(--green) 40%,transparent)}

/* split blocks */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.checks{list-style:none;margin-top:24px;display:grid;gap:14px}
.checks li{display:flex;gap:12px;align-items:flex-start}
.checks .i{color:var(--green);margin-top:3px}
.checks b{color:var(--ink)}

/* certificate */
/* ---- certificate v2 (premium document) ---- */
.cert{--cg:#c9a24f;--cg2:#9a7220;--cnavy:#0d2a5b;--cink:#141a2e;
  position:relative;background:linear-gradient(180deg,#fffdf6,#f6efdc);color:var(--cink);
  border-radius:14px;padding:18px;box-shadow:var(--shadow-lg)}
.cert-in{position:relative;overflow:hidden;border-radius:8px;padding:56px 60px 30px;border:3px solid var(--cg);
  background:
    repeating-conic-gradient(from 8deg at 50% 46%,rgba(201,162,79,.09) 0deg .5deg,transparent .5deg 2deg),
    radial-gradient(130% 100% at 50% 0%,#fffdf6 0%,#faf5e6 60%,#f3ebd4 100%);
  box-shadow:inset 0 0 0 2px #fffdf6,inset 0 0 0 3.5px rgba(154,114,32,.55),inset 0 0 90px rgba(122,92,32,.12)}
.cert-in>*{position:relative;z-index:1}
.c-orn{position:absolute;width:84px;height:84px;z-index:0;pointer-events:none}
.c-orn.tl{top:10px;left:10px}.c-orn.tr{top:10px;right:10px;transform:scaleX(-1)}
.c-orn.bl{bottom:10px;left:10px;transform:scaleY(-1)}.c-orn.br{bottom:10px;right:10px;transform:scale(-1)}
.c-wm{position:absolute;inset:0;display:grid;place-items:center;z-index:0;pointer-events:none}
.c-wm svg{width:min(400px,58%);opacity:.06}
.c-micro{position:absolute;left:-40%;right:-40%;top:50%;transform:translateY(-50%) rotate(-21deg);
  z-index:0;pointer-events:none;white-space:nowrap;overflow:hidden;font-family:'Inter';font-size:9.5px;
  letter-spacing:.32em;color:rgba(13,42,91,.13);font-weight:700}
.cert-top{display:flex;flex-direction:column;align-items:center;gap:7px;text-align:center}
.cert-top .c-logo{height:56px;width:auto}
.cert-top b{display:block;font-family:'Inter';font-weight:800;font-size:17px;letter-spacing:.18em;color:var(--cnavy)}
.cert-top b span{display:block;font-size:10.5px;letter-spacing:.42em;color:var(--cg2);margin-top:2px}
.cert-top .c-bn{font-family:'Noto Serif Bengali',serif;font-size:13px;color:#8a7440;font-weight:600}
.c-lvl{position:absolute;top:32px;right:38px;z-index:2}
.cert-body{text-align:center;padding:32px 0 20px}
.cert-body .cap{font-family:'Inter';font-size:11px;letter-spacing:.34em;color:#6b7090}
.cert-body .nm{font-family:'Noto Serif Bengali',serif;font-size:2.4rem;font-weight:600;margin:10px 0 0;color:#101735}
.c-div{width:250px;height:16px;margin:10px auto 14px;display:block}
.cert-body .cr{font-family:'Inter';font-size:14px;color:#3b4060}
.cert-body .cc{font-family:'Noto Serif Bengali',serif;font-size:1.5rem;font-weight:700;margin-top:8px;
  background:linear-gradient(92deg,#9a7220,#c9a24f 45%,#8a6418);-webkit-background-clip:text;background-clip:text;color:transparent}
.cert-body .c-lvlt{font-family:'Inter';font-size:10.5px;letter-spacing:.22em;color:#8a7440;margin-top:12px;text-transform:uppercase}
.cert-foot{display:flex;justify-content:space-between;align-items:flex-end;gap:18px;padding:6px 6px 0}
.c-verify{display:flex;gap:12px;align-items:center}
.c-verify small{font-family:'Inter';font-size:10px;letter-spacing:.14em;color:#6b7090;line-height:1.8}
.c-verify small b{display:block;color:var(--cnavy);font-size:11px;letter-spacing:.06em}
.qr{width:78px;height:78px;background:#fff;padding:5px;border:1px solid #e5e0d0;display:grid;grid-template-columns:repeat(17,1fr)}
.qr i{background:#0b1020}
.qr i.o{background:transparent}
.c-sign{display:flex;flex-direction:column;align-items:center;gap:2px;flex:1;max-width:250px}
.c-sign .c-sig{width:190px;height:52px}
.c-sign .c-ln{width:100%;height:1px;background:linear-gradient(90deg,transparent,#9a7220,transparent)}
.c-sign b{font-family:'Fraunces','Noto Serif Bengali',serif;font-size:14.5px;font-weight:600;letter-spacing:.08em;color:#101735;margin-top:5px}
.c-sign small{font-family:'Inter';font-size:10px;letter-spacing:.1em;color:#6b7090}
.c-sealw{position:relative;width:158px;flex:none}
.c-seal{width:158px;height:auto;display:block;filter:drop-shadow(0 10px 18px rgba(96,66,12,.4))}
.c-strip{margin-top:24px;padding-top:11px;border-top:1px solid rgba(154,114,32,.35);
  display:flex;justify-content:center;gap:26px;flex-wrap:wrap;font-family:'Inter';font-size:9.5px;
  letter-spacing:.18em;color:#8a7440;text-transform:uppercase}
.verified{position:absolute;top:-16px;right:-16px;display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:999px;background:var(--green);color:#fff;font-family:'Inter';font-weight:800;font-size:12px;letter-spacing:.06em;box-shadow:0 8px 20px rgba(18,147,106,.35);transform:rotate(6deg)}
.verified .i{width:16px;height:16px}
.levels{display:grid;gap:12px;margin-top:26px}
.level{display:flex;gap:16px;align-items:center;padding:16px 18px;border-radius:var(--r);background:var(--card);border:1px solid var(--line)}
.level .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;flex:none}
.level b{display:block;color:var(--ink);font-family:'Inter';font-size:15px}
.level small{color:var(--mut);font-size:13.5px}

/* roadmap */
.road{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.road::before{content:"";position:absolute;top:27px;left:28px;right:28px;height:2px;background:var(--line2)}
.phase{position:relative}
.phase .dot{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;background:var(--card);border:2px solid var(--brand);color:var(--brand);position:relative;z-index:1}
.phase.now .dot{background:var(--brand);color:#fff;box-shadow:0 0 0 6px color-mix(in srgb,var(--brand) 18%,transparent)}
.phase .d{display:block;margin-top:18px;font-size:13px;font-weight:700;color:var(--brand2)}
.phase h3{font-family:var(--sans);font-weight:700;margin:4px 0 6px}
.phase p{font-size:14.5px;color:var(--mut)}

/* CTA */
.cta{border-radius:28px;padding:64px 56px;background:linear-gradient(135deg,var(--navy),#1d2a6b 60%,#0e5f86);color:#fff;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;position:relative;overflow:hidden}
.cta::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;border:1px solid rgba(255,255,255,.12);box-shadow:0 0 0 60px rgba(255,255,255,.03),0 0 0 120px rgba(255,255,255,.02)}
.cta h2{color:#fff}
.cta p{color:#c4cbe6;margin-top:12px}
.cta .acts{display:flex;gap:12px;justify-content:flex-end;flex-wrap:wrap;position:relative;z-index:1}
.cta .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.35)}
.cta .btn-primary{background:#fff;color:var(--navy);box-shadow:none}

/* footer */
.site-footer{margin-top:96px;background:var(--navy);color:#aab2d3;font-size:14.5px}
.site-footer .wrap{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-top:64px;padding-bottom:40px}
.site-footer .logo b{color:#fff}.site-footer .logo small{color:#8c95bb}
.site-footer h4{color:#fff;font-size:14px;font-family:'Inter';letter-spacing:.08em;margin-bottom:14px}
.site-footer a{display:block;padding:4px 0;color:#aab2d3}.site-footer a:hover{color:#fff}
.site-footer .disc{margin-top:18px;font-size:13px;line-height:1.7;color:#8c95bb;max-width:360px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;font-size:13px;color:#8c95bb}
.foot-bottom .wrap{display:flex;justify-content:space-between;gap:16px;padding-top:0;padding-bottom:0;grid-template-columns:none}

/* page header */
.page-head{background:var(--soft);border-bottom:1px solid var(--line);padding:56px 0 48px}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--mut);margin-bottom:16px;flex-wrap:wrap}
.crumbs a:hover{color:var(--brand)}
.crumbs .i{width:14px;height:14px}

/* catalog */
.catalog{display:grid;grid-template-columns:260px 1fr;gap:36px;padding-top:40px}
.filters{position:sticky;top:96px;align-self:start;display:grid;gap:26px}
.fgroup h4{font-family:'Inter';font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin-bottom:10px}
.fopt{display:flex;align-items:center;gap:10px;padding:7px 10px;border-radius:9px;cursor:pointer;font-size:14.5px;color:var(--txt);transition:.15s}
.fopt:hover{background:var(--soft)}
.fopt input{accent-color:var(--brand);width:16px;height:16px}
.fopt .n{margin-left:auto;font-size:12.5px;color:var(--faint)}
.toolbar{display:flex;align-items:center;gap:12px;margin-bottom:22px;flex-wrap:wrap}
.toolbar .search{margin:0;flex:1;min-width:240px;box-shadow:none;padding:4px 4px 4px 14px}
.toolbar .search input{height:40px;font-size:15px}
.toolbar select{height:48px;padding:0 14px;border-radius:12px;border:1px solid var(--line2);background:var(--card);cursor:pointer}
.count{font-size:14px;color:var(--mut);margin-bottom:16px}
.empty{padding:60px 20px;text-align:center;border:1px dashed var(--line2);border-radius:var(--r-lg);color:var(--mut)}
.filter-toggle{display:none}

/* course page */
.c-hero{background:linear-gradient(135deg,var(--navy),#18245a);color:#fff;padding:52px 0 60px}
.c-hero .crumbs,.c-hero .crumbs a{color:#aab2d3}
.c-hero .wrap{display:grid;grid-template-columns:1fr 380px;gap:44px}
.c-hero h1{color:#fff;font-size:clamp(1.9rem,4vw,2.9rem);margin:10px 0 6px}
.c-hero .en{font-family:'Inter';color:#aab2d3;font-size:1.05rem}
.c-hero .desc{color:#d3d8ee;font-size:1.08rem;margin-top:18px;max-width:640px}
.c-meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:26px;font-size:14.5px;color:#d3d8ee}
.c-meta span{display:inline-flex;align-items:center;gap:7px}
.c-meta .i{width:18px;height:18px;color:#8fd8f0}
.review-note{display:inline-flex;align-items:center;gap:8px;margin-top:22px;padding:8px 14px;border-radius:10px;background:rgba(61,220,151,.12);border:1px solid rgba(61,220,151,.35);color:#8ff0c3;font-size:13.5px;font-weight:600}
.review-note .i{width:17px;height:17px}
.c-layout{display:grid;grid-template-columns:1fr 380px;gap:44px}
.enroll{margin-top:-260px;position:sticky;top:96px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);overflow:hidden;z-index:2;align-self:start}
.enroll .thumb{aspect-ratio:16/10}
.enroll .pad{padding:24px}
.price{font-family:var(--serif);font-size:2rem;font-weight:600;color:var(--ink)}
.price small{font-family:var(--sans);font-size:14px;color:var(--mut);font-weight:400}
.enroll ul{list-style:none;display:grid;gap:10px;margin:18px 0 22px;font-size:14.5px}
.enroll li{display:flex;gap:10px;align-items:center}
.enroll li .i{width:18px;height:18px;color:var(--brand)}
.c-main{padding-top:48px;min-width:0}
.box{border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;background:var(--card);margin-bottom:28px}
.box h2{font-size:1.5rem;margin-bottom:18px}
.learn{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px;list-style:none}
.learn li{display:flex;gap:10px;font-size:15px}
.learn .i{color:var(--green);margin-top:3px;width:18px;height:18px}
.chap{border:1px solid var(--line);border-radius:14px;margin-bottom:10px;overflow:hidden;background:var(--card)}
.chap summary{list-style:none;display:flex;align-items:center;gap:14px;padding:16px 18px;cursor:pointer;font-weight:600;color:var(--ink)}
.chap summary::-webkit-details-marker{display:none}
.chap summary:hover{background:var(--soft)}
.chap .no{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:700;flex:none}
.chap .sm{margin-left:auto;font-size:13px;color:var(--mut);font-weight:500;white-space:nowrap}
.chap .chev{transition:.2s;color:var(--faint)}
.chap[open] .chev{transform:rotate(180deg)}
.chap ol{list-style:none;padding:0 18px 12px 62px}
.chap ol li{display:flex;align-items:center;gap:10px;padding:9px 0;border-top:1px dashed var(--line);font-size:14.5px;color:var(--txt)}
.chap ol li .i{width:16px;height:16px;color:var(--faint)}
.chap ol li em{margin-left:auto;font-style:normal;font-size:12.5px;color:var(--faint)}
.made{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.made div{padding:18px;border-radius:14px;background:var(--soft);font-size:14px;color:var(--mut)}
.made b{display:flex;align-items:center;gap:8px;color:var(--ink);font-size:15px;margin-bottom:4px}
.made .i{color:var(--brand)}

/* verify */
.verify-card{max-width:720px;margin:-40px auto 0;position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);padding:36px}
.verify-form{display:flex;gap:10px}
.verify-form input{flex:1;min-width:0;height:52px;border-radius:12px;border:1px solid var(--line2);background:var(--bg);padding:0 16px;font-family:'Inter';font-size:16px;letter-spacing:.04em;text-transform:uppercase}
.verify-form input:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 14%,transparent)}
.verify-form .btn{height:52px}
.result{margin-top:24px;border-radius:16px;padding:22px;display:none}
.result.ok{display:block;background:var(--green-soft);border:1px solid color-mix(in srgb,var(--green) 40%,transparent)}
.result.no{display:block;background:color-mix(in srgb,var(--red) 8%,transparent);border:1px solid color-mix(in srgb,var(--red) 35%,transparent)}
.result h3{display:flex;align-items:center;gap:10px;font-family:var(--sans);font-weight:700}
.result dl{display:grid;grid-template-columns:150px 1fr;gap:8px 16px;margin-top:14px;font-size:14.5px}
.result dt{color:var(--mut)}
.result dd{color:var(--ink);font-weight:600}

/* modal */
.modal{position:fixed;inset:0;z-index:100;display:none;place-items:center;background:rgba(5,9,25,.55);backdrop-filter:blur(4px);padding:16px}
.modal.open{display:grid}
.modal .dlg{width:100%;max-width:440px;background:var(--card);border-radius:20px;padding:30px;box-shadow:var(--shadow-lg);border:1px solid var(--line)}
.modal h3{font-family:var(--sans);font-weight:700;font-size:1.3rem}
.modal p{color:var(--mut);margin:8px 0 18px;font-size:15px}
.modal input{width:100%;height:48px;border-radius:12px;border:1px solid var(--line2);background:var(--bg);padding:0 14px;margin-bottom:12px}
.modal .row{display:flex;gap:10px;justify-content:flex-end}

/* reveal */
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}.hv-float{animation:none}}

/* responsive */
@media (max-width:1024px){
  .hero .wrap{grid-template-columns:1fr}.hero-visual{display:none}
  .schools{grid-template-columns:repeat(2,1fr)}.facs{grid-template-columns:repeat(2,1fr)}
  .split,.cta{grid-template-columns:1fr}.cta .acts{justify-content:flex-start}
  .site-footer .wrap{grid-template-columns:1fr 1fr}
  .c-hero .wrap,.c-layout{grid-template-columns:1fr}.enroll{margin-top:24px;position:static;order:-1}
  .catalog{grid-template-columns:1fr}.filters{position:static;display:none}.filters.open{display:grid;grid-template-columns:repeat(2,1fr)}
  .filter-toggle{display:inline-flex}
}
@media (max-width:860px){
  .nav,.topbar .tb-links,.h-actions .btn{display:none}.menu-btn{display:grid}
  .strip .wrap{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr;gap:18px}.steps::before{display:none}
  .step{display:flex;text-align:left;gap:16px;align-items:center}.step .ic{margin:0;flex:none}
  .road{grid-template-columns:1fr 1fr;row-gap:32px}.road::before{display:none}
  .sec-head{flex-direction:column;align-items:flex-start}
}
@media (max-width:600px){
  .wrap{padding:0 16px}
  .section{padding:64px 0}
  .schools,.facs,.made,.learn{grid-template-columns:1fr}
  .hero .wrap{padding-top:52px;padding-bottom:56px}
  .hero-stats{gap:22px;flex-wrap:wrap}
  .strip .wrap{grid-template-columns:1fr}
  .road{grid-template-columns:1fr}
  .cta{padding:40px 24px}
  .site-footer .wrap{grid-template-columns:1fr}
  .foot-bottom .wrap{flex-direction:column}
  .filters.open{grid-template-columns:1fr}
  .verify-card{padding:24px}.verify-form{flex-direction:column}
  .result dl{grid-template-columns:1fr}
  .cert-in{padding:24px 18px}
  .box{padding:22px}
}

/* brand logo (assets/img/brand) — light/dark variants */
.brand-logo img{height:46px;width:auto;display:block}
.brand-logo .lg-dark{display:none}
:root[data-theme="dark"] .brand-logo .lg-light{display:none}:root[data-theme="dark"] .brand-logo .lg-dark{display:block}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .brand-logo .lg-light{display:none}:root:not([data-theme="light"]) .brand-logo .lg-dark{display:block}}
.site-footer .brand-logo .lg-light,.auth-art .brand-logo .lg-light{display:none!important}.site-footer .brand-logo .lg-dark,.auth-art .brand-logo .lg-dark{display:block!important}
.site-footer .brand-logo img{height:64px}
.l-top .brand-logo img{height:38px}
.cert-logo{height:58px;width:auto;display:block}
.cert.big .cert-logo{height:76px}
@media (max-width:640px){.brand-logo img{height:38px}}