html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

 body {
    background-color: plum !important; /* Bootstrap bg-dark #9e74ff*/
    color: #f8f9fa !important;            /* Bootstrap text-light */
 } 



.center-box {
    display: flex;
    justify-content: center;   /* 水平置中 */
    align-items: center;       /* 垂直置中 */
    margin:auto;
    /* height: 100vh;             佔滿視窗高度 */
}

.inner-box {
    padding: 40px 60px;        /* 固定內距，可依需求調整 */
    /* border: 1px solid #ccc;    可選：加個邊框讓區塊明顯 */
    border-radius: 12px;       /* 可選：圓角 */
    /* background: #fafafa;       可選：背景色 */
}

/*main {
    background-color: transparent !important; /* 讓 main 不蓋掉 container 的深色 */
/*}