html {
    font-family: Georgia, serif, Verdana, Geneva, Tahoma, sans-serif;
    display: inline-block;
    text-align: center;
}

p {
    font-size: 1.2rem; 
}

body {
    margin: 0;
}

.topnav {
    overflow: hidden;
    background-color: #049faa;
    color: white;
    font-size: 1rem;
    padding: 10px;
}

#authentication-bar{
    background-color:mintcream;
    padding-top: 10px;
    padding-bottom: 10px;
}

#user-details{
    color: cadetblue;
}

.content {
    padding: 20px;
}

.card {
    background-color: white;
    box-shadow: 2px 2px 12px 1px rgba(140,140,140,.5);
    padding: 5%;
}

.cards {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    grid-gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.reading {
    font-size: 1.4rem;
}

button {
    background-color: #049faa;
    color: white;
    padding: 14px 20px;
    margin: 8px 0;
    border: none;
    cursor: pointer;
    border-radius: 4px;
}
button:hover {
    opacity: 0.8;
}

.form-elements-container{
    padding: 16px;
    width: 250px;
    margin: 0 auto;
}

input[type=text], input[type=password] {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    display: inline-block;
    border: 1px solid #ccc;
    box-sizing: border-box;
}

footer {
  text-align: center;
  padding: 10px;
  background-color: rgb(177, 170, 168);
  color: white;
}

/* 新增的 CSS 規則 */
#control-panel {
    margin-top: 20px;
    text-align: center;
}

.switches {
    display: flex;
    justify-content: center;
    /* 將子元素水平居中 */
    align-items: center;
    /* 垂直居中 */
    gap: 20px;
    /* 調整間距 */
    margin-top: 10px;
}

.switch-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    /* 垂直居中 */
}

#switch-icon-1,
#switch-icon-2,
#switch-icon-3,
#switch-icon-4 {
    font-size: 2em;
    /* 調整圖示大小 */
    color: cadetblue;
    /* 預設顏色為cadetblue (OFF) */
    margin-bottom: 5px;
}