/* 全局設定 */
* {
    text-align: center;
    box-sizing: border-box;
}

body, html {
    margin: 0;
    padding: 0;
    height: 100%;
}

/* 全螢幕背景 */
.fullscreen {
    margin: 0;
    background: url("../img/login.jpg") center/cover no-repeat;
    position: fixed;
    opacity: 0.85;
    height: 100%;
    width: 100%;
}

/* 主要內容區塊 */
.field {
    margin: 150px 0;
}

/* 標題樣式 */
h1 {
    margin-bottom: 50px;
    font-size: 50px;
    color: white;
    text-shadow: 0.1em 0.1em 0.2em black;
}

/* 輸入框樣式 */
input {
    margin-bottom: 20px;
    width: 200px;
    height: 30px;
    font-size: 15px;
    border: 3px solid orange;
    border-radius: 5px;
    padding: 5px;
}

/* 按鈕樣式 */
button {
    width: 220px;
    height: 50px;
    font-size: 20px;
    border: none;
    outline: none;
    cursor: pointer;
    border-radius: 10px;
}

/* 輸入框外部容器 */
.inputs {
    margin: 15px 0;
}

/* 文字顏色 */
p {
    color: white;
}

/* 按鈕炫光效果 */
.glow-on-hover {
    background: #111;
    color: #fff;
    position: relative;
    z-index: 0;
    overflow: hidden;
    transition: background 0.3s ease-in-out;
}

.glow-on-hover:before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    background: linear-gradient(45deg, 
        #ff0000, #ff7300, #fffb00, 
        #48ff00, #00ffd5, #002bff, 
        #7a00ff, #ff00c8, #ff0000);
    background-size: 400%;
    filter: blur(5px);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    border-radius: 10px;
    animation: glowing 20s linear infinite;
}

.glow-on-hover:hover:before {
    opacity: 1;
}

.glow-on-hover:after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: #111;
    left: 0;
    top: 0;
    border-radius: 10px;
    z-index: -1;
}

.glow-on-hover:active {
    color: #000;
}

/* 版本資訊區塊 */
.version-info {
    position: fixed;
    bottom: 10px;
    right: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    text-align: right;
}

/* 炫光動畫 */
@keyframes glowing {
    0%, 100% { background-position: 0 0; }
    50% { background-position: 400% 0; }
}