/* MagicBook R251 UI shell.
   This is the product-owned layer above Calibre-Web's Bootstrap 3 UI.
   Keep selectors additive: do not rewrite vendored Calibre styles here. */

/* Primary domains: Home / Library / Learning / Account / Admin. */
.mb-primary-nav {
  margin-left: 2px;
}

.mb-primary-nav > li > a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 15px 12px;
  border-bottom: 3px solid transparent;
  color: #52606d;
  font-weight: 500;
}

.mb-primary-nav > li > a:hover,
.mb-primary-nav > li > a:focus,
.mb-primary-nav > li.active > a {
  color: #2f8f7c;
  background: transparent;
  border-bottom-color: #45b29d;
}

.mb-primary-nav > li > a .glyphicon {
  color: #45b29d;
}

/* L2: grouped, text-first navigation.  No panels or feature cards. */
.mb-l2-nav {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin: 0 15px 18px;
  padding: 6px 0 12px;
  border-bottom: 1px solid #e1e8e6;
}

.mb-l2-nav-title {
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex: 0 0 auto;
  padding-top: 2px;
}

.mb-l2-nav-domain {
  color: #34454b;
  font-size: 14px;
  font-weight: 700;
}

.mb-l2-nav-hint {
  color: #90a09c;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
}

.mb-l2-groups {
  display: flex;
  flex: 1 1 auto;
  flex-wrap: wrap;
  gap: 8px 24px;
  min-width: 0;
}

.mb-l2-group {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
  min-width: 0;
}

.mb-l2-group-label {
  color: #83918f;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .06em;
  white-space: nowrap;
}

.mb-l2-links {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 2px 10px;
}

.mb-l2-link {
  display: inline-block;
  padding: 2px 1px;
  border-bottom: 2px solid transparent;
  color: #52606d;
  font-size: 13px;
  line-height: 1.45;
  text-decoration: none;
}

.mb-l2-link:hover,
.mb-l2-link:focus {
  color: #237d6d;
  border-bottom-color: #8bc7bb;
  text-decoration: none;
}

.mb-l2-link.active {
  color: #176e5f;
  border-bottom-color: #45b29d;
  font-weight: 700;
}

body.blur .mb-l2-nav {
  border-bottom-color: rgba(255, 255, 255, .14);
}

body.blur .mb-l2-nav-domain,
body.blur .mb-l2-link {
  color: rgba(255, 255, 255, .82);
}

body.blur .mb-l2-nav-hint,
body.blur .mb-l2-group-label {
  color: rgba(255, 255, 255, .48);
}

body.blur .mb-l2-link:hover,
body.blur .mb-l2-link:focus,
body.blur .mb-l2-link.active {
  color: #8ee0cf;
  border-bottom-color: #55c7b1;
}

/* Tablet widths keep the five-domain model visible, but tighten labels. */
@media (min-width: 768px) and (max-width: 1199px) {
  .mb-primary-nav > li > a {
    padding-left: 9px;
    padding-right: 9px;
  }

  .navbar-form.navbar-left {
    margin-left: 4px;
    margin-right: 4px;
  }
}

/* Sidebar: four stable groups with the same visual rhythm. */
#scnd-nav .nav-head {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 16px 0 4px;
  padding: 0 10px 5px;
  border-top: 0;
  border-bottom: 1px solid #e6ecec;
  color: #7b8a94;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

#scnd-nav .nav-head::before {
  content: "";
  width: 3px;
  height: 11px;
  border-radius: 2px;
  background: #45b29d;
  flex: 0 0 auto;
}

#scnd-nav .mb-group-count {
  margin-left: auto;
  padding: 1px 6px;
  border-radius: 9px;
  background: #f0f4f3;
  color: #70817e;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 16px;
}

#scnd-nav .nav-head:first-child {
  margin: 0 0 4px;
}

#scnd-nav .mb-shelf-group-wrap {
  margin-bottom: 8px;
}

#scnd-nav .mb-shelf-group {
  margin: 0;
}

#scnd-nav .mb-shelf-group > li > a {
  display: flex;
  align-items: center;
  gap: 7px;
}

#scnd-nav .mb-shelf-name {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#scnd-nav .badge-sm {
  flex: 0 0 auto;
}

body:not(.blur) #scnd-nav > li.active > a,
body:not(.blur) #scnd-nav .mb-shelf-group > li.active > a {
  color: #237d6d;
  background: #edf6f4;
  border-radius: 5px;
}

/* CaliBlur allocates 60px to every nav heading; keep the product rhythm compact. */
body.blur #scnd-nav#scnd-nav > li.nav-head {
  height: auto;
  min-height: 34px;
  margin: 18px 0 4px;
  padding: 0 10px 6px 15px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  line-height: 1.35;
}

body.blur #scnd-nav .mb-group-count {
  background: rgba(255, 255, 255, .14);
  color: rgba(255, 255, 255, .82);
}

/* Section titles and cards: one product-wide language. */
.home-section-title,
.discover > h2 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  padding: 0 0 8px;
  border-bottom: 1px solid #e6ecec;
  color: #334149;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
}

.home-section-title::before,
.discover > h2::before {
  content: "";
  width: 3px;
  height: 18px;
  border-radius: 2px;
  background: #45b29d;
  flex: 0 0 auto;
}

.home-plan-card,
.mb-card {
  background: #fff;
  border: 1px solid #e5e7e9;
  border-radius: 6px;
  padding: 14px;
  box-shadow: 0 1px 2px rgba(31, 47, 51, .03);
}

.mb-chip {
  display: inline-flex;
  align-items: center;
  min-height: 20px;
  padding: 1px 8px;
  border-radius: 10px;
  background: #edf6f4;
  color: #2f8f7c;
  font-size: 11px;
  font-weight: 600;
  line-height: 18px;
}

/* Mobile: keep domain actions thumb-reachable. */
@media (max-width: 767px) {
  body {
    padding-bottom: 56px;
  }

  /* Bootstrap 的 .visible-xs 带 display:block!important；产品底栏必须更高优先级。 */
  .mb-bottom-nav.visible-xs {
    display: flex !important;
  }

  .mb-bottom-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 7px 0 5px;
  }

  .mb-l2-nav {
    display: block;
    margin: 0 5px 14px;
  }

  .mb-l2-nav-title {
    margin-bottom: 8px;
  }

  .mb-l2-groups {
    display: block;
  }

  .mb-l2-group {
    display: block;
    margin-bottom: 9px;
  }

  .mb-l2-group-label {
    display: block;
    margin-bottom: 2px;
  }

  .mb-l2-links {
    gap: 1px 12px;
  }

  /* ai_chat.css 后加载且使用同 ID 选择器；提高一级特异度守住底栏安全区。 */
  body #ai-companion-fab-wrap {
    bottom: 64px;
  }
}