スタイル入力ボックスをグーグルで検索してみました。しかし、私はinput:focusで立ち往生しています。コードは http://jsfiddle.net/GmgUZ/の下にあります
input:hover{
border-bottom-color: #B9B9B9;
border-bottom-style: solid;
border-bottom-width: 1px;
border-left-color-ltr-source: physical;
border-left-color-rtl-source: physical;
border-left-color-value: #B9B9B9;
border-left-style-ltr-source: physical;
border-left-style-rtl-source: physical;
border-left-style-value: solid;
border-left-width-ltr-source: physical;
border-left-width-rtl-source: physical;
border-left-width-value: 1px;
border-right-color-ltr-source: physical;
border-right-color-rtl-source: physical;
border-right-color-value: #B9B9B9;
border-right-style-ltr-source: physical;
border-right-style-rtl-source: physical;
border-right-style-value: solid;
border-right-width-ltr-source: physical;
border-right-width-rtl-source: physical;
border-right-width-value: 1px;
border-top-color: #A0A0A0;
border-top-style: solid;
border-top-width: 1px;
box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1) inset;
}
input[type="text"]:focus {
border:1px solid #4D90FE;
-webkit-box-shadow:0 1px 2px rgba(0, 0, 0, 0.3) inset;
-moz-box-shadow:0 1px 2px rgba(0, 0, 0, 0.3) inset;
box-shadow:0 1px 2px rgba(0, 0, 0, 0.3) inset;
}
どんな洞察も大歓迎です!