:root{--bg:#0f172a;--card:#1e293b;--acc:#38bdf8;--txt:#e2e8f0;--mut:#94a3b8}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--txt);font-family:system-ui,'Segoe UI',Roboto,Arial,sans-serif;line-height:1.7}
.wrap{max-width:900px;margin:0 auto;padding:0 16px}
.site-header{background:#0b1220;border-bottom:1px solid #24324d;position:sticky;top:0;z-index:10}
.header-in{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;gap:8px;flex-wrap:wrap}
.brand{color:var(--acc);font-weight:700;text-decoration:none;font-size:1.15rem}
.lang-toggle{display:flex;gap:6px}
.lang-toggle button{background:var(--card);color:var(--txt);border:1px solid #334155;border-radius:8px;padding:6px 12px;cursor:pointer;font-size:.9rem}
.lang-toggle button.active{background:var(--acc);color:#0b1220;border-color:var(--acc);font-weight:700}
.hero{text-align:center;padding:36px 0 12px}.hero h1{margin:0 0 8px}
.card{background:var(--card);border:1px solid #2b3b55;border-radius:12px;padding:18px;margin:16px 0}
.card h2{margin-top:0;color:var(--acc)}.card h3{margin-top:0}
.step h3{color:var(--acc)}
pre{background:#0b1220;border:1px solid #2b3b55;border-radius:8px;padding:12px;overflow-x:auto;color:#a5f3fc;font-size:.88rem;line-height:1.5}
.gui{background:#0b1220;border-left:3px solid var(--acc);padding:8px 12px;border-radius:0 8px 8px 0}
.badge{display:inline-block;background:#0b1220;border:1px solid #334155;border-radius:20px;padding:3px 12px;font-size:.8rem;margin:2px 4px 2px 0}
.badge.exam{border-color:var(--acc);color:var(--acc)}.badge.env{border-color:#4ade80;color:#4ade80}
.crumbs{margin:16px 0;color:var(--mut);font-size:.9rem}.crumbs a{color:var(--acc)}
.pagenav{display:flex;justify-content:space-between;margin:28px 0;gap:8px}
.btn{background:var(--acc);color:#0b1220;padding:10px 18px;border-radius:10px;text-decoration:none;font-weight:700}
.complete{display:flex;align-items:center;gap:8px;background:var(--card);border:1px dashed #475569;border-radius:10px;padding:10px 14px;margin:12px 0;cursor:pointer}
.complete.done{border-style:solid;border-color:#4ade80}
.facts ul,.card ul{padding-left:20px}
.muted{color:var(--mut);font-size:.9rem}
.pbar{background:#0b1220;border-radius:8px;height:10px;overflow:hidden;margin-top:8px}
.pbar>div{background:linear-gradient(90deg,#38bdf8,#4ade80);height:100%;width:0;transition:width .4s}
.course h3 a{color:var(--txt);text-decoration:none}.course h3 a:hover{color:var(--acc)}
.site-footer{border-top:1px solid #24324d;margin-top:40px;padding:20px 0;color:var(--mut);font-size:.9rem;text-align:center}
.site-footer a{color:var(--acc)}
a{color:var(--acc)}
/* language visibility */
html[data-lang="ur"] [data-l]:not([data-l="ur"]),
html[data-lang="rur"] [data-l]:not([data-l="rur"]),
html[data-lang="en"] [data-l]:not([data-l="en"]){display:none}
[data-l="ur"]{direction:rtl;text-align:right}
li [data-l="ur"]{display:inline}
html[data-lang="ur"] li [data-l="ur"]{display:inline}