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header{background:#1b6b4a}header .w{display:flex;flex-wrap:wrap;gap:18px;align-items:center;padding:14px 16px;max-width:960px;margin:0 auto}header a{color:#fff}.logo{font-size:22px;font-weight:700;margin-right:auto}
main{background:#fff;max-width:960px;margin:20px auto;padding:24px;border-radius:6px}h1{font-size:24px}h2{font-size:18px;margin:1.4em 0 .3em}footer{text-align:center;color:#888;font-size:13px;padding:24px 16px}