:root{--bg:#f8fafc;--card:#fff;--tx:#0f172a;--mut:#475569;--bd:#e2e8f0;--pri:#4f46e5;--pri2:#6366f1;--acc:#0891b2;--neet:#059669;--jee:#2563eb;--warn:#d97706;--sh:0 8px 30px rgba(15,23,42,.08)}
:root[data-theme=dark]{--bg:#060913;--card:#0e1628;--tx:#f1f5f9;--mut:#94a3b8;--bd:#1e293b;--pri:#818cf8;--pri2:#6366f1;--acc:#22d3ee;--neet:#34d399;--jee:#60a5fa;--warn:#fbbf24;--sh:0 8px 30px rgba(0,0,0,.4)}
*{box-sizing:border-box;margin:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Plus Jakarta Sans',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--tx);line-height:1.65;font-size:16px}
h1,h2,h3{font-family:'Space Grotesk','Plus Jakarta Sans',sans-serif;line-height:1.2;letter-spacing:-.02em}
a{color:var(--pri);text-decoration:none}a:hover{text-decoration:underline}
.w{max-width:1120px;margin:0 auto;padding:0 20px}.sec{padding:56px 0}.c{text-align:center}
h1{font-size:clamp(2rem,5.5vw,3.4rem);font-weight:800}h2{font-size:clamp(1.5rem,3.5vw,2.1rem);font-weight:700;margin-bottom:14px}h3{font-size:1.15rem;margin-bottom:6px}
p{margin-bottom:14px;color:var(--mut)}.lead{font-size:1.1rem;max-width:720px}.c .lead{margin:0 auto 22px}
.hd{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--bd)}
.hd .w{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.logo{display:flex;align-items:center;gap:10px;font:800 1.25rem 'Space Grotesk',sans-serif;color:var(--tx)}.logo:hover{text-decoration:none}.logo b{color:var(--pri)}
.logo i{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#2563eb,#4f46e5,#9333ea);display:grid;place-items:center;color:#fff;font-style:normal;font-size:1rem}
nav{display:flex;align-items:center;gap:4px}nav a{color:var(--tx);font-weight:600;font-size:.9rem;padding:8px 12px;border-radius:10px}nav a:hover,nav a[aria-current]{background:var(--bd);text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:14px;font-weight:700;border:0;cursor:pointer;font-size:1rem;background:var(--pri2);color:#fff!important;box-shadow:0 8px 24px rgba(79,70,229,.3);transition:.2s}
.btn:hover{transform:translateY(-1px);text-decoration:none;filter:brightness(1.08)}.btn.o{background:transparent;color:var(--tx)!important;border:1px solid var(--bd);box-shadow:none}.btn.sm{padding:9px 16px;font-size:.88rem}
.ic{background:0;border:1px solid var(--bd);border-radius:10px;width:40px;height:40px;cursor:pointer;color:var(--tx);font-size:1.1rem}#mb{display:none}
.hero{padding:64px 0 40px;background:radial-gradient(900px 400px at 50% -10%,rgba(99,102,241,.22),transparent)}
.pill{display:inline-block;padding:6px 14px;border-radius:99px;border:1px solid var(--bd);background:var(--card);font-size:.8rem;font-weight:700;color:var(--pri);margin-bottom:18px}
.g{background:linear-gradient(135deg,#2563eb,#7c3aed);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
:root[data-theme=dark] .g{background-image:linear-gradient(135deg,#38bdf8,#c084fc)}
.grid{display:grid;gap:20px}.g2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.g3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{background:var(--card);border:1px solid var(--bd);border-radius:20px;padding:24px;box-shadow:var(--sh)}.card p:last-child{margin-bottom:0}
.card.neet{border-top:4px solid var(--neet)}.card.jee{border-top:4px solid var(--jee)}.card.pro{border:2px solid var(--pri)}
.tag{font:700 .72rem monospace;text-transform:uppercase;letter-spacing:.08em}.tn{color:var(--neet)}.tj{color:var(--jee)}
.price{font:800 2.4rem 'Space Grotesk',sans-serif;color:var(--tx)}.price s{font-size:1rem;color:var(--mut);font-weight:500}
ul.ck{list-style:none;padding:0;margin:12px 0}ul.ck li{padding:5px 0 5px 26px;position:relative;color:var(--tx);font-size:.95rem}ul.ck li:before{content:"✓";position:absolute;left:0;color:var(--neet);font-weight:800}
details{background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:16px 18px;margin-bottom:10px}summary{cursor:pointer;font-weight:700}details p{margin:10px 0 0}
.tool label{display:block;font-weight:700;font-size:.85rem;margin:10px 0 4px}.tool select,.tool input{width:100%;padding:11px 12px;border-radius:12px;border:1px solid var(--bd);background:var(--bg);color:var(--tx);font:inherit}
.tl{list-style:none;padding:0;margin:16px 0 0}.tl li{display:flex;justify-content:space-between;gap:10px;padding:11px 14px;border-left:4px solid var(--pri);background:var(--bg);border-radius:10px;margin-bottom:8px;font-size:.92rem;color:var(--tx)}.tl span{color:var(--mut);font-family:monospace;font-size:.82rem;white-space:nowrap}
.cd{display:flex;gap:10px;margin-top:10px}.cd div{flex:1;text-align:center;background:var(--bg);border-radius:12px;padding:10px}.cd b{display:block;font:800 1.7rem 'Space Grotesk',sans-serif;color:var(--pri)}.cd small{color:var(--mut);font-size:.7rem;text-transform:uppercase}
.crumb{font-size:.82rem;color:var(--mut);padding:18px 0 0}.art h2{margin-top:30px}.art ul,.art ol{margin:0 0 14px 22px;color:var(--mut)}.art li{margin-bottom:6px}
table{width:100%;border-collapse:collapse;font-size:.9rem;margin:14px 0}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--bd)}th{color:var(--tx)}td{color:var(--mut)}.tw{overflow-x:auto}
footer{border-top:1px solid var(--bd);padding:40px 0 24px;margin-top:40px;background:var(--card)}footer .grid{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}footer h3{font-size:.9rem}footer a{display:block;color:var(--mut);padding:3px 0;font-size:.9rem}.cp{font-size:.8rem;margin-top:26px;color:var(--mut)}
@media(max-width:820px){nav{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bg);padding:12px 20px;border-bottom:1px solid var(--bd)}nav.open{display:flex}#mb{display:block}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.hd,footer,.btn{display:none}}