*{box-sizing:border-box;margin:0;padding:0;font-family:'Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif}
:root{--primary:#2563eb;--bg:#fafbff;--text:#0f172a;--muted:#64748b;--line:#e5e7eb}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text)}
/* header */
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav{max-width:1100px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:10px 16px;gap:10px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.logo{background:var(--primary);color:#fff;font-weight:800;border-radius:8px;padding:6px 10px}
.brand small{display:block;font-size:12px;color:var(--muted)}
nav a{color:var(--text);text-decoration:none;padding:8px 10px;border-radius:8px;font-weight:500}
nav a.active, nav a:hover{background:#eef4ff;color:#0b3dd9}
.btn{padding:10px 14px;border-radius:12px;text-decoration:none;font-weight:600;display:inline-block}
.btn-primary{background:var(--primary);color:#fff}
.btn-outline{border:1px solid var(--line);color:#0f172a}
/* layout */
main{max-width:1100px;margin:0 auto;padding:28px 16px}
h1{font-size:2rem;margin-bottom:8px} h2{font-size:1.6rem;margin-bottom:6px}
.lead{color:var(--muted);margin-bottom:18px}
.grid{display:grid;gap:16px}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.cols-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.cols-3,.cols-2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid #eef0f4;border-radius:16px;padding:16px;box-shadow:0 1px 0 rgba(0,0,0,.02)}
.badge{display:inline-block;background:#eef2ff;color:#1d4ed8;border-radius:999px;padding:4px 10px;font-size:.8rem;margin-bottom:8px}
.center{text-align:center}
footer{background:#fff;border-top:1px solid var(--line);text-align:center;padding:18px 12px;margin-top:30px;color:#475569}
/* ===== Page header (title + subtitle) ===== */
.page-hero{max-width:1100px;margin:24px auto 10px;padding:0 20px;text-align:center}
.page-hero h1{font-size:2rem;margin-bottom:6px}
.page-hero p{color:#475569}

/* ===== Services page cards (অল্প বড়, নিট ক্লিন) ===== */
.services-grid{display:grid;gap:16px;margin:18px auto;grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.services-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.services-grid{grid-template-columns:1fr}}

.service-card{background:#fff;border:1px solid #eef0f4;border-radius:16px;padding:18px;
  box-shadow:0 1px 0 rgba(0,0,0,.02)}
.service-card h3{font-size:1.05rem;margin-bottom:6px}
.service-card p{color:#334155;font-size:.96rem}

/* ছোট ব্যাজ */
.kit-badge{display:inline-block;font-size:.78rem;padding:4px 10px;border-radius:999px;
  background:#eef2ff;color:#1d4ed8;margin-bottom:8px}

/* ===== Breadcrumb (ঐচ্ছিক) ===== */
.breadcrumb{max-width:1100px;margin:10px auto 0;padding:0 20px;color:#64748b;font-size:.9rem}
.breadcrumb a{color:#2563eb;text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}