/* 側欄結構樣式（取代 MDB side-nav / fixed-sn） */

.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1040;
  width: 300px;
  height: 100%;
  padding: 0 0 3.75rem;
  margin: 0;
  overflow: hidden;
  list-style: none;
  background-color: rgba(255, 255, 255, 0.85);
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  will-change: transform;
}

.side-nav.is-open,
.side-nav.is-desktop {
  transform: translateX(0);
}

.side-nav > ul {
  max-height: 100vh;
}

.side-nav ul {
  padding-left: 0;
  list-style: none;
}

.side-nav ul li {
  padding: 0;
}

.side-nav a {
  display: block;
  color: inherit;
  text-decoration: none;
}

.side-nav .logo-wrapper {
  padding: 1rem;
}

.side-nav .sidenav-bg {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  pointer-events: none;
}

.side-nav .sidenav-bg:after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.25);
}

.collapsible-body {
  display: none;
}

.collapsible-body.is-open {
  display: block;
}

.side-nav .collapsible a {
  display: block;
}

.side-nav .collapsible-header .rotate-icon {
  float: right;
  transition: transform 0.2s ease;
}

.side-nav .collapsible-header.active .rotate-icon {
  transform: rotate(180deg);
}

#sidenav-overlay {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1035;
  height: 120vh;
  background-color: rgba(0, 0, 0, 0.5);
}

#sidenav-overlay.is-visible {
  display: block;
}

.double-nav .button-collapse {
  position: absolute;
  left: 10px;
  font-size: 1.5rem;
}

@media (min-width: 1440px) {
  body.page_index .double-nav .button-collapse {
    display: none;
  }
}

@media (max-width: 1439px) {
  .double-nav .button-collapse {
    position: relative;
    display: block;
    margin-right: 10px;
    margin-left: 10px;
    font-size: 1.4rem;
  }
}

.fixed-sn main {
  padding-top: 5.5rem;
}

@media (min-width: 1440px) {
  body.page_index .fixed-sn .double-nav,
  body.page_index .fixed-sn main,
  body.page_index .fixed-sn footer {
    padding-left: 300px;
  }
}

@media (min-width: 600px) {
  .fixed-sn main,
  .fixed-sn .page-footer .container-fluid {
    margin-right: 2%;
    margin-left: 2%;
  }
}

@media (min-width: 992px) {
  .fixed-sn main,
  .fixed-sn .page-footer .container-fluid {
    margin-right: 5%;
    margin-left: 5%;
  }
}

@media (min-width: 1200px) {
  .fixed-sn main,
  .fixed-sn .page-footer .container-fluid {
    margin-right: 6%;
    margin-left: 6%;
  }
}

/* white-skin 主題（取代 MDB side-nav 外觀） */
.white-skin .side-nav {
  background-color: rgba(255, 255, 255, 0.85);
}

.white-skin .side-nav .sidenav-bg:after,
.white-skin .side-nav .sidenav-bg.mask-strong:after {
  background-color: transparent;
}

.side-nav .collapsible {
  padding: 0;
  margin: 0;
}

.side-nav .collapsible > li {
  position: relative;
  background-color: transparent;
}

.side-nav .collapsible-header {
  position: relative;
  padding: 0 1rem 0 1.5rem;
  height: 2.75rem;
  line-height: 2.75rem;
  font-size: 1rem;
  font-weight: 300;
  color: #333;
  cursor: pointer;
  border: 0;
  background: transparent;
}

.side-nav .collapsible-header .fas.fa-chevron-right {
  margin-right: 0.35rem;
  font-size: 0.75rem;
}

.side-nav .collapsible-header .rotate-icon {
  margin-top: 0.85rem;
  margin-right: 0.25rem;
  font-size: 0.85rem;
}

.white-skin .side-nav .collapsible li .collapsible-header.active {
  color: #172b54;
  font-weight: 400;
}

.side-nav li .collapsible-body a {
  padding: 0.5rem 1rem 0.5rem 2.5rem;
  height: auto;
  line-height: 1.5;
  font-size: 0.95rem;
  font-weight: 300;
  color: #333;
}

.side-nav li .collapsible-body ul li.L3 a {
  padding-left: 3rem;
}

.white-skin .side-nav .collapsible li ul li a.L3 {
  padding-left: 3.75rem;
}

/* 首頁桌面版：L2 子選單飛出右側 */
@media (min-width: 1440px) {
  body.page_index .side-nav.is-desktop,
  body.page_index .side-nav.is-open.is-desktop {
    overflow: visible;
  }

  body.page_index .side-nav .collapsible ul {
    width: 300px;
  }

  body.page_index .side-nav .collapsible-body {
    position: absolute;
    z-index: 1050;
    min-width: 240px;
    margin-top: -2.75rem;
    margin-left: 240px;
    padding: 0;
    background-color: rgba(1, 41, 86, 0.88);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  }

  body.page_index .side-nav li .collapsible-body a {
    color: #fff;
    padding-left: 1.25rem;
  }

  body.page_index .side-nav li .collapsible-body a .fas {
    color: #fff;
  }

  body.page_index .white-skin .side-nav .collapsible li .collapsible-body {
    background-color: rgba(1, 41, 86, 0.88);
  }

  body.page_index .white-skin .side-nav .collapsible li .collapsible-body a {
    color: #fff;
  }

  body.page_index .white-skin .side-nav .collapsible li .collapsible-body a:hover,
  body.page_index .white-skin .side-nav .collapsible li a:not(.collapsible-header):hover,
  body.page_index .white-skin .side-nav .collapsible li a:not(.collapsible-header).active {
    color: #fcb61a !important;
    background-color: #172b54 !important;
  }

  body.page_index .fixed-sn .double-nav .button-collapse {
    display: none !important;
  }
}

/* 手機／平板：子選單收合在側欄內 */
@media (max-width: 1439px) {
  .side-nav .collapsible > li.active .collapsible-body,
  .side-nav .collapsible-body.is-open {
    display: block;
  }

  .side-nav li .collapsible-body a {
    padding-left: 2.25rem;
  }
}