@font-face{font-family:"Mukta";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/mukta-400.woff2) format("woff2")}
@font-face{font-family:"Mukta";font-style:normal;font-weight:700;font-display:swap;src:url(fonts/mukta-700.woff2) format("woff2")}
:root{--ink:#0F0B2E;--ink2:#1E1B4B;--ind:#4338CA;--vio:#6D28D9;--vio2:#7C3AED;--cyan:#22D3EE;--cyan-d:#0E7490;--bg:#F6F5FF;--card:#fff;--text:#1C1840;--muted:#5B5878;--line:#E4E1F5;--tip:#ECFEFF;--warn:#FFF7ED;--note:#F5F3FF;--r:16px;--sh:0 1px 2px rgba(30,27,75,.06),0 8px 24px rgba(30,27,75,.07)}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:"Mukta",system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Devanagari",sans-serif;font-size:18px;line-height:1.65;color:var(--text);background:var(--bg)}
img{max-width:100%;height:auto;display:block}
a{color:var(--ind);text-underline-offset:3px}
a:hover{color:var(--vio)}
:focus-visible{outline:3px solid var(--cyan);outline-offset:2px;border-radius:6px}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:99}
.skip:focus{left:8px}
.wrap{width:min(1120px,100% - 32px);margin-inline:auto}
.narrow{width:min(760px,100% - 32px);margin-inline:auto}
/* header */
.hdr{position:sticky;top:0;z-index:20;background:rgba(15,11,46,.96);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid rgba(255,255,255,.08)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px}
.logo{display:flex;align-items:center;gap:9px;color:#fff;text-decoration:none;font-weight:700;font-size:21px;letter-spacing:-.2px;white-space:nowrap}
.logo:hover{color:#fff}
.logo svg{flex:none}
.logo b{color:var(--cyan);font-weight:700}
.nav{display:flex;align-items:center;gap:4px}
.nav a{color:#E0E7FF;text-decoration:none;font-size:16px;padding:8px 10px;border-radius:10px}
.nav a:hover,.nav a[aria-current=page]{background:rgba(255,255,255,.1);color:#fff}
.lang{border:1px solid rgba(34,211,238,.6);color:#A5F3FC!important;font-weight:700}
.mnav{display:none;position:relative}
.mnav summary{list-style:none;cursor:pointer;color:#fff;border:1px solid rgba(255,255,255,.25);border-radius:10px;padding:6px 12px;font-size:16px}
.mnav summary::-webkit-details-marker{display:none}
.mnav[open] .mpanel{display:flex}
.mpanel{display:none;flex-direction:column;position:absolute;right:0;top:46px;background:var(--ink2);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:8px;min-width:220px;box-shadow:0 12px 32px rgba(0,0,0,.35)}
.mpanel a{color:#E0E7FF;text-decoration:none;padding:10px 12px;border-radius:10px}
.mpanel a:hover{background:rgba(255,255,255,.08)}
@media (max-width:1120px){.nav{display:none}.mnav{display:block}}
/* hero */
.hero{background:radial-gradient(900px 400px at 85% 10%,rgba(34,211,238,.18),transparent 60%),linear-gradient(135deg,#0F0B2E 0%,#2A1F7A 55%,#5B21B6 100%);color:#fff;padding:56px 0 64px;overflow:hidden}
.hero .eyebrow{display:inline-block;font-size:15px;font-weight:700;color:#A5F3FC;border:1px solid rgba(34,211,238,.5);background:rgba(34,211,238,.1);border-radius:99px;padding:3px 14px;margin-bottom:14px}
.hero h1{font-size:clamp(36px,7vw,62px);line-height:1.12;margin:0 0 14px;letter-spacing:-.5px}
.hero h1 span{color:var(--cyan)}
.hero p.lead{font-size:clamp(18px,2.4vw,21px);color:#E0E7FF;max-width:640px;margin:0 0 24px}
.hero .chips{display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:22px;color:#C7D2FE;font-size:16px;padding:0;list-style:none}
.hero .chips li::before{content:"✓ ";color:var(--cyan);font-weight:700}
.page-hero{background:linear-gradient(135deg,#0F0B2E 0%,#2A1F7A 70%,#4C1D95 100%);color:#fff;padding:36px 0 40px}
.page-hero h1{font-size:clamp(30px,5.5vw,46px);line-height:1.18;margin:6px 0 8px}
.page-hero p{color:#E0E7FF;margin:0;max-width:700px}
.page-hero .sub-en{color:#A5F3FC;font-size:18px}
.crumbs{font-size:15px;color:#C7D2FE}
.crumbs a{color:#C7D2FE}
/* buttons */
.btns{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 22px;border-radius:12px;font-weight:700;font-size:17px;text-decoration:none;border:0;cursor:pointer;font-family:inherit;line-height:1.2}
.btn-p{background:var(--cyan);color:#0B1A2B}
.btn-p:hover{background:#67E8F9;color:#0B1A2B}
.btn-g{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn-g:hover{background:rgba(255,255,255,.18);color:#fff}
.btn-v{background:var(--vio);color:#fff}
.btn-v:hover{background:var(--vio2);color:#fff}
.btn-o{background:#fff;color:var(--ind);border:1.5px solid var(--line)}
.btn-wa{background:#128C3C;color:#fff}
.btn-wa:hover{background:#0F7A34;color:#fff}
.btn-sm{min-height:40px;padding:6px 14px;font-size:15px;border-radius:10px}
/* sections */
section.sec{padding:48px 0}
section.alt{background:#fff;border-block:1px solid var(--line)}
.sec h2{font-size:clamp(26px,4vw,34px);line-height:1.2;margin:0 0 6px;letter-spacing:-.3px}
.sec .kicker{color:var(--vio);font-weight:700;font-size:15px;text-transform:uppercase;letter-spacing:.6px;margin:0}
.sec .intro{color:var(--muted);margin:0 0 24px;max-width:680px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr))}
.g3{grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr))}
.g4{grid-template-columns:repeat(auto-fill,minmax(min(100%,230px),1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--sh);display:flex;flex-direction:column;gap:6px;min-width:0}
.card h3{font-size:20px;line-height:1.3;margin:0}
.card p{margin:0;color:var(--muted);font-size:16.5px}
.card .ico{font-size:28px;line-height:1}
a.card{text-decoration:none;color:inherit;transition:transform .15s,border-color .15s}
a.card:hover{transform:translateY(-2px);border-color:#C4B5FD;color:inherit}
.lcard .num{display:inline-flex;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--ind),var(--vio));color:#fff;font-weight:700;align-items:center;justify-content:center;font-size:16px}
.lcard .en{color:var(--cyan-d);font-size:15px;font-weight:700}
.meta{font-size:14.5px;color:var(--muted)}
.tag{display:inline-block;font-size:13.5px;font-weight:700;padding:2px 10px;border-radius:99px;background:var(--note);color:var(--vio)}
.tag.free{background:#ECFDF5;color:#047857}
.tag.paid{background:#FFF7ED;color:#B45309}
.more{margin-top:20px}
/* lesson article */
.article{background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(20px,4vw,40px);margin:-24px auto 0;position:relative;box-shadow:var(--sh)}
.article h2{font-size:clamp(23px,3.4vw,28px);line-height:1.3;margin:34px 0 10px;scroll-margin-top:80px}
.article h2 .en,.article h2 span.en{display:block;font-size:15px;color:var(--cyan-d);font-weight:700;letter-spacing:.2px;margin-top:2px}
.article h3{font-size:21px;margin:24px 0 6px}
.article p{margin:0 0 14px}
.article ul,.article ol{padding-left:24px;margin:0 0 16px}
.article li{margin:4px 0}
.article code{background:var(--note);padding:1px 6px;border-radius:6px;font-size:.92em;overflow-wrap:anywhere}
.article a{overflow-wrap:anywhere}
.box{border-radius:14px;padding:14px 16px;margin:18px 0;border:1px solid}
.box p:last-child{margin-bottom:0}
.box.tip{background:var(--tip);border-color:#A5F3FC}
.box.warn{background:var(--warn);border-color:#FED7AA}
.box.note{background:var(--note);border-color:#DDD6FE}
.prompt{position:relative;background:#14112F;color:#E0E7FF;border-radius:14px;margin:16px 0;padding:14px 16px 14px;border:1px solid #2E2A63}
.prompt pre{margin:0;white-space:pre-wrap;word-wrap:break-word;font-family:"Mukta",ui-monospace,monospace;font-size:16.5px;line-height:1.6}
.prompt .copy{display:flex;margin:10px 0 0 auto}
.copy{background:var(--cyan);color:#0B1A2B;border:0;border-radius:9px;font:700 14.5px "Mukta",sans-serif;padding:6px 14px;cursor:pointer;min-height:36px}
.copy.done{background:#86EFAC}
.lesson-meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:#C7D2FE;font-size:15.5px;margin-top:10px}
details.sum{background:var(--note);border:1px solid #DDD6FE;border-radius:14px;padding:12px 16px;margin:0 0 20px}
details.sum summary{cursor:pointer;font-weight:700;color:var(--vio)}
details.sum ul{margin:10px 0 0}
.faq details{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:10px 0;background:#fff}
.faq summary{cursor:pointer;font-weight:700}
.faq details p{margin:8px 0 0;color:var(--muted)}
.sources{font-size:16px}
.sources li{overflow-wrap:anywhere}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
.pn a{border:1px solid var(--line);border-radius:14px;padding:12px 14px;text-decoration:none;color:var(--text);background:#fff;min-width:0}
.pn a small{display:block;color:var(--muted)}
.pn a.next{text-align:right;grid-column:2}
@media (max-width:560px){.pn{grid-template-columns:1fr}.pn a.next{grid-column:1}}
.cta{background:linear-gradient(135deg,#1E1B4B,#4C1D95);color:#fff;border-radius:20px;padding:clamp(22px,4vw,36px);display:grid;gap:14px}
.cta h2,.cta h3{color:#fff;margin:0}
.cta p{color:#E0E7FF;margin:0}
.updated{font-size:14.5px;color:var(--muted)}
/* news */
.news-item{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--sh);margin-bottom:16px}
.news-item h3{margin:6px 0 8px;font-size:21px;line-height:1.35}
.news-item .lbl{font-weight:700;color:var(--vio)}
.news-item p{margin:0 0 8px}
/* tools */
.tool{background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(18px,4vw,32px);box-shadow:var(--sh)}
.field{display:flex;flex-direction:column;gap:4px;margin-bottom:14px}
.field label{font-weight:700;font-size:16px}
.field small{color:var(--muted);font-size:14.5px}
input[type=text],input[type=search],select,textarea{font:inherit;font-size:17px;padding:10px 12px;border:1.5px solid #CFCBEA;border-radius:12px;background:#fff;color:var(--text);width:100%}
textarea{min-height:90px;resize:vertical}
input:focus,select:focus,textarea:focus{border-color:var(--vio);outline:2px solid #DDD6FE}
.out{background:#14112F;color:#E0E7FF;border-radius:14px;padding:16px;white-space:pre-wrap;word-wrap:break-word;min-height:120px;font-size:16.5px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
@media (max-width:620px){.row2{grid-template-columns:1fr}}
.chipbar{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:99px;padding:6px 14px;font:700 15px "Mukta",sans-serif;color:var(--text);cursor:pointer;min-height:38px}
.chip[aria-pressed=true]{background:var(--vio);border-color:var(--vio);color:#fff}
.lib-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:8px}
.lib-item h3{margin:0;font-size:18px}
.lib-item pre{margin:0;white-space:pre-wrap;word-wrap:break-word;font-family:inherit;font-size:16px;background:var(--bg);border-radius:10px;padding:10px 12px}
.lib-item .copy{align-self:flex-start}
.caps{display:grid;gap:12px}
.cap{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;display:flex;flex-direction:column;gap:8px}
.cap p{margin:0;white-space:pre-wrap}
.cap .copy{align-self:flex-start}
/* directory */
.dir-card .top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.dir-card h3 a{text-decoration:none;color:var(--text)}
.dir-card .go{margin-top:auto;padding-top:8px;font-weight:700}
/* about */
.about-grid{display:grid;grid-template-columns:200px 1fr;gap:28px;align-items:start}
.about-grid img{border-radius:20px;border:4px solid #fff;box-shadow:var(--sh)}
@media (max-width:680px){.about-grid{grid-template-columns:1fr}.about-grid img{max-width:180px}}
.prose h2{font-size:24px;margin:30px 0 8px}
.prose p,.prose li{max-width:72ch}
.ebook{display:grid;grid-template-columns:180px 1fr;gap:24px;align-items:center}
.ebook .cover{aspect-ratio:3/4;border-radius:12px;background:linear-gradient(160deg,#1E1B4B,#6D28D9 70%,#22D3EE);color:#fff;display:flex;flex-direction:column;justify-content:flex-end;padding:16px;font-weight:700;line-height:1.25;box-shadow:var(--sh)}
.ebook .cover small{color:#A5F3FC;font-weight:400}
@media (max-width:560px){.ebook{grid-template-columns:1fr}.ebook .cover{max-width:170px}}
/* footer */
footer.ftr{background:var(--ink);color:#C7D2FE;padding:44px 0 28px;margin-top:56px;font-size:16px}
.ftr .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.ftr h4{color:#fff;margin:0 0 10px;font-size:17px}
.ftr ul{list-style:none;padding:0;margin:0}
.ftr li{margin:6px 0}
.ftr a{color:#C7D2FE;text-decoration:none}
.ftr a:hover{color:#fff;text-decoration:underline}
.ftr .base{border-top:1px solid rgba(255,255,255,.1);margin-top:28px;padding-top:18px;font-size:14.5px;display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between}
@media (max-width:820px){.ftr .cols{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.ftr .cols{grid-template-columns:1fr 1fr;gap:20px}.ftr .cols>div:first-child{grid-column:1/-1}}
.notice{background:#FEF9C3;border-bottom:1px solid #FDE68A;color:#713F12;font-size:14.5px;text-align:center;padding:6px 12px}
.center{text-align:center}
.mt0{margin-top:0}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media (max-width:560px){.g4{grid-template-columns:1fr 1fr;gap:12px}.g4 .card{padding:14px}.g4 .card h3{font-size:17.5px}.g4 .card p{font-size:15px}section.sec{padding:40px 0}}
.hero-grid{display:grid;gap:40px;align-items:center}
.demo{display:none}
@media (min-width:980px){.hero-grid{grid-template-columns:1.15fr .85fr}.demo{display:block}}
.demo{background:rgba(15,11,46,.55);border:1px solid rgba(165,243,252,.25);border-radius:20px;padding:18px;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.demo .lbl{font-size:13px;font-weight:700;color:#A5F3FC;letter-spacing:.5px;text-transform:uppercase;margin:0 0 6px}
.demo .bub{border-radius:14px;padding:12px 14px;font-size:16px;line-height:1.55;margin:0 0 12px}
.demo .me{background:rgba(255,255,255,.1);color:#fff}
.demo .ai{background:#fff;color:var(--text);margin:0}
.demo small{display:block;color:#C7D2FE;font-size:13px;margin-top:10px}