:root{--navy:#071e33;--ink:#103058;--blue:#0078e8;--pale:#edf5fc;--line:#d5e3f0;--muted:#53657c;--yellow:#ffda57}*{box-sizing:border-box}body{margin:0;background:#f8fbfe;color:var(--ink);font:400 17px/1.6 Kanit,system-ui,sans-serif}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}button,a{touch-action:manipulation}:focus-visible{outline:3px solid #efb700;outline-offset:4px}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:500;line-height:1.25}h1{font-size:clamp(36px,4.5vw,62px)}h2{font-size:32px}h3{font-size:23px}p{margin:10px 0}.demo{background:#e4effb;color:#31577a;text-align:center;font-size:12px;padding:6px 14px}.demo button{border:0;background:none;color:#0863b3;text-decoration:underline;font-size:12px;margin-left:12px}header{max-width:1360px;margin:auto;padding:17px 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