/* ============================================================ Dr. N. Rathankar Rao — Unified Design System Clean Light Academic · shared across all sites Site accent is set in each page's via :root override. ============================================================ */ :root{ --ink:#1b1f2a; --muted:#5b6472; --paper:#ffffff; --bg:#f7f8fb; --line:#e6e9f0; --accent:#2563eb; --accent-soft:#eaf1ff; --accent-dark:#1e40af; --gold:#b45309; --radius:16px; --shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px -8px rgba(16,24,40,.12); --shadow-lg:0 24px 48px -16px rgba(16,24,40,.22); --font-head:'Fraunces',Georgia,serif; --font-body:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif; } *{margin:0;padding:0;box-sizing:border-box} html{scroll-behavior:smooth} body{font-family:var(--font-body);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16.5px;-webkit-font-smoothing:antialiased} img{max-width:100%;display:block} a{color:var(--accent-dark);text-decoration:none} a:hover{text-decoration:underline} h1,h2,h3,h4{font-family:var(--font-head);font-weight:600;line-height:1.18;letter-spacing:-.01em} .container{max-width:1160px;margin:0 auto;padding:0 22px} /* ---------- Ecosystem strip ---------- */ .eco-strip{background:var(--ink);color:#cbd5e1;font-size:.82rem;position:relative;z-index:60} .eco-strip .container{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding-top:7px;padding-bottom:7px} .eco-strip .eco-label{color:#94a3b8;letter-spacing:.08em;text-transform:uppercase;font-size:.68rem;font-weight:600} .eco-strip a{color:#e2e8f0;text-decoration:none;padding:2px 10px;border-radius:999px;border:1px solid transparent;white-space:nowrap} .eco-strip a:hover{border-color:#475569} .eco-strip a.active{background:var(--accent);color:#fff;font-weight:600} /* ---------- Header / nav ---------- */ .site-header{background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50} .site-header .container{display:flex;align-items:center;gap:26px;height:70px} .brand{display:flex;align-items:center;gap:11px;text-decoration:none!important;color:var(--ink)} .brand .logo-badge{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-dark));display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--font-head);font-size:1.15rem;font-weight:700;flex:none;box-shadow:var(--shadow)} .brand img.logo-img{width:40px;height:40px;border-radius:12px;object-fit:cover;flex:none} .brand .brand-name{font-family:var(--font-head);font-weight:700;font-size:1.12rem;line-height:1.1} .brand .brand-tag{font-size:.7rem;color:var(--muted);letter-spacing:.04em} nav.main-nav{margin-left:auto;display:flex;gap:4px;align-items:center;flex-wrap:wrap} nav.main-nav a{color:var(--ink);font-weight:500;font-size:.92rem;padding:8px 13px;border-radius:10px;text-decoration:none!important} nav.main-nav a:hover{background:var(--accent-soft);color:var(--accent-dark)} nav.main-nav a.active{background:var(--accent-soft);color:var(--accent-dark);font-weight:600} nav.main-nav a.cta{background:var(--accent);color:#fff;font-weight:600} nav.main-nav a.cta:hover{background:var(--accent-dark);color:#fff} .nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-size:1.05rem;cursor:pointer;color:var(--ink)} @media(max-width:920px){ .nav-toggle{display:block} nav.main-nav{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:12px 20px;gap:2px;box-shadow:var(--shadow-lg)} nav.main-nav.open{display:flex} nav.main-nav a{padding:12px 14px} } /* ---------- Hero ---------- */ .hero{position:relative;overflow:hidden;background: radial-gradient(1100px 500px at 85% -10%,var(--accent-soft) 0%,transparent 60%), radial-gradient(700px 420px at -10% 110%,var(--accent-soft) 0%,transparent 55%), linear-gradient(180deg,#ffffff 0%,var(--bg) 100%)} .hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;padding-top:74px;padding-bottom:78px} .hero.hero-single .container{grid-template-columns:1fr;text-align:center;max-width:880px} .hero .kicker{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);color:var(--accent-dark);font-weight:600;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;padding:7px 15px;border-radius:999px;box-shadow:var(--shadow);margin-bottom:22px} .hero .kicker::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent);animation:pulse 2.2s infinite} @keyframes pulse{0%,100%{box-shadow:0 0 0 0 var(--accent-soft)}50%{box-shadow:0 0 0 7px transparent}} .hero h1{font-size:clamp(2.1rem,4.4vw,3.35rem);margin-bottom:18px} .hero h1 .hl{color:var(--accent-dark);font-style:italic} .hero p.lead{font-size:1.13rem;color:var(--muted);max-width:56ch;margin-bottom:30px} .hero.hero-single p.lead{margin-left:auto;margin-right:auto} .hero-actions{display:flex;gap:13px;flex-wrap:wrap} .hero.hero-single .hero-actions{justify-content:center} .hero-art{position:relative} .hero-art svg{width:100%;height:auto;filter:drop-shadow(0 20px 34px rgba(16,24,40,.14))} .hero-photo{border-radius:24px;box-shadow:var(--shadow-lg);border:6px solid #fff;object-fit:cover;width:100%;max-height:500px;object-position:top} .float-chip{position:absolute;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);padding:10px 16px;font-size:.85rem;font-weight:600;display:flex;align-items:center;gap:8px;animation:floaty 5s ease-in-out infinite} .float-chip .big{font-family:var(--font-head);font-size:1.2rem;color:var(--accent-dark)} @keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}} @media(max-width:920px){.hero .container{grid-template-columns:1fr;padding-top:50px;padding-bottom:54px}.hero-art{max-width:460px;margin:0 auto}} /* ---------- Buttons ---------- */ .btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:.97rem;padding:13px 24px;border-radius:12px;text-decoration:none!important;transition:transform .15s ease,box-shadow .15s ease;cursor:pointer;border:0} .btn:hover{transform:translateY(-2px)} .btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 22px -8px var(--accent)} .btn-primary:hover{background:var(--accent-dark);color:#fff} .btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow)} .btn-ghost:hover{border-color:var(--accent);color:var(--accent-dark)} .btn .arr{transition:transform .15s} .btn:hover .arr{transform:translateX(3px)} /* ---------- Sections ---------- */ section.block{padding:74px 0} section.block.tint{background:linear-gradient(180deg,#fff, var(--bg))} section.block.dark{background:var(--ink);color:#e2e8f0} section.block.dark h2{color:#fff} .sec-head{max-width:760px;margin-bottom:44px} .sec-head.center{margin-left:auto;margin-right:auto;text-align:center} .sec-head .eyebrow{color:var(--accent-dark);font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-size:.75rem;display:block;margin-bottom:12px} section.block.dark .sec-head .eyebrow{color:#93c5fd} .sec-head h2{font-size:clamp(1.7rem,3vw,2.4rem);margin-bottom:14px} .sec-head p{color:var(--muted);font-size:1.05rem} section.block.dark .sec-head p{color:#94a3b8} /* ---------- Grids & cards ---------- */ .grid{display:grid;gap:22px} .grid.cols-2{grid-template-columns:repeat(2,1fr)} .grid.cols-3{grid-template-columns:repeat(3,1fr)} .grid.cols-4{grid-template-columns:repeat(4,1fr)} @media(max-width:980px){.grid.cols-4{grid-template-columns:repeat(2,1fr)}.grid.cols-3{grid-template-columns:repeat(2,1fr)}} @media(max-width:640px){.grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}} .card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease} .card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--accent)} .card .card-media{aspect-ratio:16/9;overflow:hidden;background:var(--accent-soft)} .card .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease} .card:hover .card-media img{transform:scale(1.05)} .card .card-body{padding:22px;display:flex;flex-direction:column;gap:9px;flex:1} .card h3{font-size:1.16rem} .card p{color:var(--muted);font-size:.94rem;flex:1} .card .card-link{font-weight:600;color:var(--accent-dark);font-size:.92rem;text-decoration:none!important} .card .card-link:hover{text-decoration:underline!important} .card .icon-bubble{width:50px;height:50px;border-radius:14px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;font-size:1.45rem;margin-bottom:4px} a.card{text-decoration:none!important;color:inherit} .pill{display:inline-block;background:var(--accent-soft);color:var(--accent-dark);font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;border-radius:999px;padding:4px 11px} .pill.gold{background:#fef3c7;color:#92400e} .pill.green{background:#dcfce7;color:#166534} /* ---------- Steps ---------- */ .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px} @media(max-width:860px){.steps{grid-template-columns:1fr}} .step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);position:relative} .step .step-num{width:44px;height:44px;border-radius:50%;background:var(--accent);color:#fff;font-family:var(--font-head);font-weight:700;font-size:1.25rem;display:flex;align-items:center;justify-content:center;margin-bottom:15px;box-shadow:0 8px 16px -6px var(--accent)} .step h3{font-size:1.12rem;margin-bottom:8px} .step p{color:var(--muted);font-size:.93rem;margin-bottom:12px} .step a.step-go{font-weight:600;font-size:.9rem;color:var(--accent-dark)} /* ---------- Chips ---------- */ .chip-wall{display:flex;flex-wrap:wrap;gap:10px} .chip{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 17px;font-size:.9rem;font-weight:500;color:var(--ink);text-decoration:none!important;box-shadow:var(--shadow);transition:all .15s} .chip:hover{border-color:var(--accent);color:var(--accent-dark);transform:translateY(-2px)} .chip::before{content:"▶";font-size:.62rem;color:var(--accent)} .chip.page::before{content:"↗"} /* ---------- List panels ---------- */ .list-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-bottom:26px} .list-panel .lp-head{padding:18px 24px;border-bottom:1px solid var(--line);background:linear-gradient(90deg,var(--accent-soft),#fff);display:flex;align-items:center;gap:12px} .list-panel .lp-head h3{font-size:1.14rem} .list-panel .lp-head .pill{margin-left:auto} .list-panel ul{list-style:none} .list-panel li{border-bottom:1px solid var(--line)} .list-panel li:last-child{border-bottom:0} .list-panel li a{display:flex;align-items:center;gap:12px;padding:13px 24px;color:var(--ink);font-size:.95rem;text-decoration:none!important} .list-panel li a:hover{background:var(--accent-soft);color:var(--accent-dark)} .list-panel li a::before{content:"▶";color:var(--accent);font-size:.65rem} .list-panel li a .tag{margin-left:auto;font-size:.72rem;color:var(--muted);background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:2px 9px;white-space:nowrap} /* ---------- Past-paper year blocks ---------- */ .year-block{margin-bottom:36px} .year-block h3{font-family:var(--font-head);font-size:1.7rem;color:var(--accent-dark);margin-bottom:14px;display:flex;align-items:center;gap:14px} .year-block h3::after{content:"";flex:1;height:1px;background:var(--line)} .paper-links{display:flex;flex-wrap:wrap;gap:10px} .paper-links a{background:#fff;border:1px solid var(--line);border-radius:12px;padding:11px 19px;font-weight:600;font-size:.92rem;color:var(--ink);text-decoration:none!important;box-shadow:var(--shadow);transition:all .15s} .paper-links a:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-2px)} .paper-links a.disabled{opacity:.5;pointer-events:none} /* ---------- Stats ---------- */ .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px} @media(max-width:860px){.stats{grid-template-columns:repeat(2,1fr)}} .stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;text-align:center;box-shadow:var(--shadow)} .stat .num{font-family:var(--font-head);font-size:2.5rem;font-weight:700;color:var(--accent-dark);line-height:1} .stat .lbl{color:var(--muted);font-size:.9rem;margin-top:9px;font-weight:500} section.dark .stat{background:#232936;border-color:#333b4d} section.dark .stat .num{color:#fff} section.dark .stat .lbl{color:#94a3b8} /* ---------- Testimonials ---------- */ .tcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:16px} .tcard .quote-mark{font-family:var(--font-head);font-size:3rem;line-height:.5;color:var(--accent);opacity:.55} .tcard p{color:var(--muted);font-size:.95rem;font-style:italic;flex:1} .tcard .who{display:flex;align-items:center;gap:13px} .tcard .who img{width:52px;height:52px;border-radius:50%;object-fit:cover;border:2px solid var(--accent-soft)} .tcard .who b{display:block;font-size:.95rem} .tcard .who span{font-size:.8rem;color:var(--muted)} /* ---------- CTA banner ---------- */ .cta-banner{background:linear-gradient(120deg,var(--accent-dark),var(--accent));border-radius:22px;padding:52px 48px;color:#fff;display:flex;align-items:center;gap:34px;flex-wrap:wrap;box-shadow:var(--shadow-lg);position:relative;overflow:hidden} .cta-banner::after{content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;border:34px solid rgba(255,255,255,.12)} .cta-banner h2{font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:10px;color:#fff} .cta-banner p{opacity:.9;max-width:52ch} .cta-banner .btn{background:#fff;color:var(--accent-dark)} .cta-banner .cta-txt{flex:1;min-width:280px;position:relative;z-index:2} /* ---------- Footer ---------- */ footer.site-footer{background:var(--ink);color:#94a3b8;padding:58px 0 30px} footer .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px} @media(max-width:860px){footer .foot-grid{grid-template-columns:1fr 1fr}} @media(max-width:560px){footer .foot-grid{grid-template-columns:1fr}} footer h4{color:#fff;font-size:1rem;margin-bottom:15px} footer ul{list-style:none} footer li{margin-bottom:9px} footer a{color:#cbd5e1;font-size:.9rem;text-decoration:none} footer a:hover{color:#fff;text-decoration:underline} footer .foot-brand p{font-size:.9rem;max-width:36ch;margin-top:12px} footer .foot-bottom{border-top:1px solid #333b4d;padding-top:22px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.82rem} .socials{display:flex;gap:10px;margin-top:16px} .socials a{width:38px;height:38px;border-radius:10px;background:#232936;display:flex;align-items:center;justify-content:center;font-size:.95rem;color:#e2e8f0;text-decoration:none!important;border:1px solid #333b4d} .socials a:hover{background:var(--accent);border-color:var(--accent);color:#fff} /* ---------- Page head ---------- */ .page-head{background:linear-gradient(120deg,var(--accent-soft),#fff);border-bottom:1px solid var(--line);padding:52px 0 44px} .page-head .crumb{font-size:.82rem;color:var(--muted);margin-bottom:12px} .page-head .crumb a{color:var(--accent-dark)} .page-head h1{font-size:clamp(1.9rem,3.6vw,2.7rem);margin-bottom:12px} .page-head p{color:var(--muted);max-width:70ch;font-size:1.04rem} /* ---------- Misc ---------- */ .note{background:#fffbeb;border:1px solid #fde68a;border-radius:12px;padding:15px 20px;font-size:.92rem;color:#92400e} .two-col{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center} @media(max-width:860px){.two-col{grid-template-columns:1fr}} .reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease} .reveal.in{opacity:1;transform:none} ::selection{background:var(--accent);color:#fff}