:root{--violet:#864ffe;color:#1f1d2b;font-family:system-ui,sans-serif}body{max-width:760px;margin:0 auto;padding:0 16px;line-height:1.6}header{justify-content:space-between;align-items:center;padding:20px 0;display:flex}nav a{color:inherit;margin-left:16px}.logo{color:var(--violet);font-weight:700;text-decoration:none}.bouton{background:var(--violet);color:#fff;border:0;border-radius:8px;padding:10px 16px;text-decoration:none;display:inline-block}form{gap:12px;display:grid}label{gap:4px;display:grid}input,textarea{font:inherit;border:1px solid #ccc;border-radius:6px;padding:8px}footer{color:#777;margin:48px 0 24px;font-size:13px}