/* =============================================================
   cacsemlink Canvas - 顶栏主题
   覆盖 Canvas 默认左侧 Global Navigation，改为顶部横向布局
   ============================================================= */

/* ---- 防闪烁：JS 注入前先隐藏左栏（即时生效，比 JS 早） ---- */
.ic-app-header { display: none !important; }

/* ---- 隐藏 Canvas 自带的移动头与移动面包屑 ----
   Canvas 在移动端会渲染 #mobile-header（自带汉堡按钮 + logo）和 #mobileContextNavContainer
   （上下文面包屑），并由其中的汉堡触发 MobileGlobalMenu 全屏抽屉。我们已用自定义 #cacsem-topbar
   接管移动端导航，避免两套抽屉并存，把 Canvas 自带的这套整体隐掉（桌面端 Canvas 自身已经隐藏
   它们，此处把行为扩展到所有断点）。隐掉 #mobile-header 意味着触发抽屉的按钮也消失，
   MobileGlobalMenu 自然不会出现。 */
#mobile-header,
#mobileContextNavContainer { display: none !important; }

body { padding-top: 64px !important; }

/* 主内容区不再让位给左栏 */
#application,
.ic-app-main-layout-horizontal,
#wrapper,
#main {
  margin-left: 0 !important;
}

/* 移除 Canvas 默认主内容上方的间距冲突 */
.ic-app-main-content { padding-top: 0; }

/* ---- 顶栏容器 ---- */
#cacsem-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: #394B58;
  color: #ffffff;
  z-index: 100;
  display: flex;
  align-items: stretch;
  font-family: "Lato Extended", Lato, sans-serif;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

/* ---- Logo 区 ---- */
#cacsem-topbar .cs-logo {
  display: flex;
  align-items: center;
  padding: 0 24px;
  flex-shrink: 0;
}
#cacsem-topbar .cs-logo a {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: inherit;
  height: 100%;
}
#cacsem-topbar .cs-logo img {
  height: 40px;
  width: auto;
  display: block;
}

/* ---- 主菜单 ---- */
#cacsem-topbar .cs-nav {
  display: flex;
  align-items: stretch;
  flex-grow: 1;
  margin: 0;
  padding: 0;
  list-style: none;
}
#cacsem-topbar .cs-nav-item {
  position: relative;
  display: flex;
  align-items: stretch;
}
#cacsem-topbar .cs-nav-item > a,
#cacsem-topbar .cs-nav-item > button {
  display: flex;
  align-items: center;
  padding: 0 18px;
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  transition: background 0.15s;
  white-space: nowrap;
}
#cacsem-topbar .cs-nav-item > a:hover,
#cacsem-topbar .cs-nav-item > button:hover,
#cacsem-topbar .cs-nav-item.cs-open > button,
#cacsem-topbar .cs-nav-item.cs-open > a {
  background: #475A68;
  color: #ffffff;
  text-decoration: none;
}
#cacsem-topbar .cs-nav-item.cs-active > a,
#cacsem-topbar .cs-nav-item.cs-active > button {
  color: #ffffff;
  background: #475A68;
  box-shadow: inset 0 -3px 0 #0374B5;
}

/* 下拉箭头 */
#cacsem-topbar .cs-caret {
  margin-left: 6px;
  font-size: 10px;
  opacity: 0.85;
  transition: transform 0.15s;
}
#cacsem-topbar .cs-nav-item.cs-open .cs-caret {
  transform: rotate(180deg);
}

/* 未读 badge */
#cacsem-topbar .cs-badge {
  display: inline-block;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin-left: 8px;
  background: #D43F3A;
  color: #ffffff;
  border-radius: 9px;
  font-size: 11px;
  line-height: 18px;
  text-align: center;
  font-weight: 700;
}
#cacsem-topbar .cs-badge[data-count="0"],
#cacsem-topbar .cs-badge:empty {
  display: none;
}

/* 头像 */
#cacsem-topbar .cs-avatar-img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid #ffffff;
  margin-right: 8px;
  background: #ddd;
  object-fit: cover;
}
#cacsem-topbar .cs-avatar-name {
  font-size: 14px;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---- 下拉菜单 ---- */
#cacsem-topbar .cs-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  max-width: 360px;
  background: #ffffff;
  color: #2D3B45;
  border: 1px solid #C7CDD1;
  border-top: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  display: none;
  max-height: 70vh;
  overflow-y: auto;
  border-radius: 0 0 4px 4px;
}
#cacsem-topbar .cs-nav-item.cs-open .cs-dropdown {
  display: block;
}
#cacsem-topbar .cs-nav-item.cs-right .cs-dropdown {
  left: auto;
  right: 0;
}

#cacsem-topbar .cs-dropdown a,
#cacsem-topbar .cs-dropdown button.cs-link {
  display: block;
  padding: 10px 16px;
  color: #2D3B45;
  font-size: 14px;
  text-decoration: none;
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#cacsem-topbar .cs-dropdown a:hover,
#cacsem-topbar .cs-dropdown button.cs-link:hover {
  background: #F2F4F4;
  color: #0374B5;
  text-decoration: none;
}

#cacsem-topbar .cs-dropdown .cs-dropdown-section-title {
  padding: 8px 16px 4px;
  font-size: 11px;
  font-weight: 700;
  color: #6C7780;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: #F9FAFA;
}
#cacsem-topbar .cs-dropdown .cs-divider {
  height: 1px;
  background: #C7CDD1;
  margin: 4px 0;
}
#cacsem-topbar .cs-dropdown .cs-empty {
  padding: 16px;
  text-align: center;
  color: #6C7780;
  font-size: 13px;
}
#cacsem-topbar .cs-dropdown .cs-loading {
  padding: 16px;
  text-align: center;
  color: #6C7780;
  font-size: 13px;
}

/* ---- 移动端汉堡按钮 ---- */
#cacsem-topbar .cs-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 56px;
  background: transparent;
  border: none;
  color: #ffffff;
  cursor: pointer;
  font-size: 24px;
}
#cacsem-topbar .cs-hamburger:hover {
  background: #475A68;
}

/* 移动端遮罩 */
#cacsem-mobile-overlay {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 99;
}
body.cs-mobile-menu-open #cacsem-mobile-overlay { display: block; }

/* ---- 响应式：< 768px ---- */
@media (max-width: 768px) {
  body { padding-top: 56px !important; }

  #cacsem-topbar {
    height: 56px;
  }
  /* 移动端：logo 绝对定位真水平居中（相对顶栏整体，而不是 flex 剩余空间）；
     hamburger 仍在 flex 流里靠左，互不影响。 */
  #cacsem-topbar .cs-logo {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    transform: translateX(-50%);
    padding: 0;
  }
  #cacsem-topbar .cs-logo img {
    height: 32px;
  }
  /* 移动端：汉堡放到 logo 左边（cs-nav 在移动端是 position:fixed 不占 flex 位，
     所以剩余 flex 项就是 logo + hamburger，用 order:-1 反序即可）。 */
  #cacsem-topbar .cs-hamburger { display: flex; order: -1; }

  /* 主菜单变成抽屉 */
  #cacsem-topbar .cs-nav {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    bottom: auto;
    max-height: calc(100vh - 56px);
    background: #394B58;
    flex-direction: column;
    align-items: stretch;
    overflow-y: auto;
    /* 64 = 顶栏 56px + 8px 缓冲；用 -100% (自身高度) + -64px 确保抽屉底部完全位于
       视口顶部之外，避免账户头像那种比顶栏低的元素从顶部露出（折叠态白色半圆 bug） */
    transform: translateY(calc(-100% - 64px));
    transition: transform 0.25s ease;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  }
  body.cs-mobile-menu-open #cacsem-topbar .cs-nav {
    transform: translateY(0);
  }

  #cacsem-topbar .cs-nav-item {
    display: block;
    border-top: 1px solid #475A68;
  }
  /* 账户项在桌面横向栏用内联 margin-left:auto 靠右；移动竖向抽屉里需复位为整行左对齐 */
  #cacsem-topbar .cs-nav-item.cs-right {
    margin-left: 0 !important;
  }
  #cacsem-topbar .cs-nav-item > a,
  #cacsem-topbar .cs-nav-item > button {
    width: 100%;
    padding: 14px 20px;
    justify-content: flex-start;
  }

  /* 下拉在移动端展开为内联列表 */
  #cacsem-topbar .cs-dropdown {
    position: static;
    width: 100%;
    max-width: none;
    background: #2E3D48;
    color: #ffffff;
    border: none;
    box-shadow: none;
    border-radius: 0;
    max-height: none;
  }
  #cacsem-topbar .cs-dropdown a,
  #cacsem-topbar .cs-dropdown button.cs-link {
    color: #E5E9EC;
    padding: 12px 36px;
    font-size: 14px;
  }
  #cacsem-topbar .cs-dropdown a:hover,
  #cacsem-topbar .cs-dropdown button.cs-link:hover {
    background: #475A68;
    color: #ffffff;
  }
  #cacsem-topbar .cs-dropdown .cs-dropdown-section-title {
    background: #2E3D48;
    color: #94A3AB;
  }
  #cacsem-topbar .cs-dropdown .cs-divider {
    background: #475A68;
  }
}

/* ---- 课程内左侧导航适配 ----
   Canvas 原生 #left-side.ic-app-course-menu 用 position:absolute; right:100% 定位
   在主内容区域左外侧，依赖 .ic-app-header 占位。我们隐藏全局左栏后它跑屏幕外了。
   接管定位让它在 hamburger 切换 body.course-menu-expanded 时显示在屏幕左侧。
   ============================================================================ */
body.course-menu-expanded #left-side.ic-app-course-menu {
  position: fixed !important;
  top: 64px;
  left: 0 !important;
  right: auto !important;
  width: 192px;
  height: calc(100vh - 64px);
  background: #ffffff;
  border-right: 1px solid #C7CDD1;
  z-index: 50;
  overflow-y: auto;
  opacity: 1 !important;
  padding: 16px 12px;
  box-sizing: border-box;
  transform: none !important;
}

/* 课程菜单展开时主内容让位 */
body.course-menu-expanded:not(.ic-no-flex-layout):not(.embedded) #wrapper {
  padding-left: 192px;
  box-sizing: border-box;
  transition: padding-left 0.2s ease;
}

/* 移动端：菜单全屏抽屉式 */
@media (max-width: 768px) {
  body.course-menu-expanded #left-side.ic-app-course-menu {
    top: 56px;
    height: calc(100vh - 56px);
    width: 80%;
    max-width: 280px;
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.2);
  }
  body.course-menu-expanded:not(.ic-no-flex-layout):not(.embedded) #wrapper {
    padding-left: 0;
  }
}

/* ---- 兼容：Canvas 某些全屏页（Speedgrader 等）已自己隐藏左栏，不要再叠加我们的顶栏 ---- */
body.full-width:not(.with-left-side):not(.with-right-side) #cacsem-topbar,
body.no-headers #cacsem-topbar {
  /* 这些页面如果出现问题再排除 */
}

/* Canvas 模态弹窗 z-index 通常 > 1000，不会被顶栏遮挡 */

/* ---- 手机端登录页（Canvas mobile_auth 布局）：整页深色，与桌面端登录一致 ----
   logo SVG 主体文字是白色，需要深色背景才能显示。桌面端用 Canvas 默认
   ic-brand-Login-body-bgd-color (#394B58)；而 mobile_auth.scss 把 body 硬编码成白底，
   故在此覆盖。作用域用 :has(#f1_container) 限定在登录/找回密码页（仅 mobile_auth 布局有
   #f1_container），不影响任何登录后的 Canvas 页面。 */
html:has(#f1_container),
body:has(#f1_container) {
  background-color: #394B58 !important;
}
body:has(#f1_container) {
  padding-top: 0 !important;        /* 抵消本主题为顶栏设的全局 body padding-top */
}
body:has(#f1_container) .mobileLogin-Header {
  background-color: transparent !important;   /* 与整页深色融为一体，去掉方块接缝 */
  background-image: url("/images/gordonconwell-logo.svg") !important;
  background-position: center !important;
  background-repeat: no-repeat !important;
  background-size: 80% auto !important;
  min-height: 120px !important;
  margin: 8px 0 16px 0 !important;
}
body:has(#f1_container) .forgotBlock a {
  color: #8fd0ff !important;        /* 深底上提亮"忘记密码"链接对比度 */
}