:root {
    --bg: #f7f7f5;
    --surface: #ffffff;
    --text: #171717;
    --muted: #6b6b6b;
    --border: #e5e5e2;
}

* { box-sizing: border-box; }
html { font-family: Arial, "Noto Sans Bengali", sans-serif; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { font-size: 26px; font-weight: 800; letter-spacing: -.02em; }
.tagline { color: var(--muted); font-size: 14px; }
.hero { min-height: calc(100vh - 73px); display: grid; align-content: center; max-width: 760px; padding: 72px 0; }
.eyebrow { margin: 0 0 14px; color: var(--muted); font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(40px, 7vw, 72px); line-height: 1.05; letter-spacing: -.04em; }
.hero > p:last-child { margin: 24px 0 0; color: var(--muted); font-size: 18px; line-height: 1.7; }
@media (max-width: 640px) {
    .header-inner { min-height: 64px; }
    .brand { font-size: 22px; }
    .tagline { display: none; }
    .hero { min-height: calc(100vh - 65px); padding: 48px 0; }
}