/**
 * header.css — Shared page header styles
 * Standard: table-view/index.html
 *
 * Provides:
 *   .page-header       — top gradient bar (fixed-height, flex row)
 *   .page-header h4    — page title
 *   .page-header small — subtitle / breadcrumb
 *   .user-nav-btn      — pill-shaped nav button (dashboard / user)
 *
 * Usage: link this file on every page that uses .page-header
 */

/* ── CSS variables (subset used by the header) ───────────────────────── */
:root {
  --blue:     #1a56db;
  --blue-lt:  #0ea5e9;
  --header-h: 62px;
}

/* ── Page header ──────────────────────────────────────────────────────── */
.page-header {
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-lt) 100%);
  color: #fff;
  padding: 0 20px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  box-shadow: 0 2px 16px rgba(26, 86, 219, .22);
  z-index: 200;
  /* Sticky so it stays visible when the page scrolls */
  position: sticky;
  top: 0;
}

.page-header h4 {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .4px;
  margin: 0;
}

.page-header small {
  opacity: .72;
  font-size: 12px;
  display: block;
  margin-top: 1px;
}

/* ── User / nav pill buttons ──────────────────────────────────────────── */
.user-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: rgba(255, 255, 255, .92);
  text-decoration: none;
  background: rgba(255, 255, 255, .15);
  border-radius: 30px;
  padding: 6px 14px 6px 10px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background .18s;
  border: none;
}

.user-nav-btn:hover {
  background: rgba(255, 255, 255, .26);
  color: #fff;
}

.user-nav-btn .bi {
  font-size: 17px;
}

/* ── Dashboard dropdown (控制台 hover menu) ──────────────────────────── */
.lab-dashboard-dropdown { position: relative; flex-shrink: 0; }
.lab-dashboard-dropdown > button { cursor: pointer; border: none; }
.lab-dd-panel {
  opacity: 0;
  visibility: hidden;
  position: absolute; left: 0; top: 100%;
  background: #fff; border: 1.5px solid #e2e8f0;
  border-radius: 12px; padding: 8px;
  min-width: 200px; z-index: 9999;
  box-shadow: 0 8px 24px rgba(0,0,0,.13);
  transform: translateY(2px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}
@media (hover: hover) {
  .lab-dashboard-dropdown:hover .lab-dd-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition-delay: 0s;
  }
}

.lab-dashboard-dropdown.open .lab-dd-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s;
}
.lab-dashboard-dropdown.open .lab-chevron { transform: rotate(180deg); }
.lab-dd-panel {
  transition-delay: 0.15s;
}
.lab-dd-group-label {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 10px 2px; font-size: 11px; font-weight: 700;
  color: #94a3b8; text-transform: uppercase; letter-spacing: .5px;
}
.lab-dd-item {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 7px 10px; font-size: 13px; font-weight: 500;
  color: #374151; text-decoration: none; background: none; border: none;
  border-radius: 8px; cursor: pointer; white-space: nowrap;
  transition: background .15s;
}
.lab-dd-item:hover {
  background: var(--dd-bg, #f1f5f9);
  color: var(--dd-color, #1a56db);
}
.lab-dd-divider { height: 1px; background: #f1f5f9; margin: 4px 0; }

/* ── User dropdown (账号设置/退出) ───────────────────────────────────── */
.lab-user-dropdown { position: relative; flex-shrink: 0; }
.lab-user-btn { cursor: pointer; border: none; }
.lab-chevron { transition: transform .2s; }
.lab-user-dropdown.open .lab-chevron { transform: rotate(180deg); }
.lab-dropdown-menu {
  opacity: 0;
  visibility: hidden;
  position: absolute; right: 0; top: 100%;
  background: #fff; border: 1.5px solid #e2e8f0;
  border-radius: 12px; padding: 6px;
  min-width: 160px; z-index: 9999;
  box-shadow: 0 8px 24px rgba(0,0,0,.13);
  transform: translateY(2px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}
@media (hover: hover) {
  .lab-user-dropdown:hover .lab-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition-delay: 0s;
  }
}

.lab-user-dropdown.open .lab-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s;
}
.lab-dropdown-menu {
  transition-delay: 0.15s;
}
.lab-dropdown-item {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 8px 12px; font-size: 13px; font-weight: 500;
  color: #374151; text-decoration: none; background: none; border: none;
  border-radius: 8px; cursor: pointer; white-space: nowrap;
  transition: background .15s;
}
.lab-dropdown-item:hover { background: #f1f5f9; }
.lab-dropdown-danger { color: #dc2626 !important; }
.lab-dropdown-danger:hover { background: #fee2e2 !important; }
.lab-dropdown-divider {
  height: 1px; background: #f1f5f9; margin: 4px 0;
}

@media screen and (max-width: 480px) {
  .page-header{padding: 0;}
  .page-header .flex-fill small,.page-header h4 i{display: none;}
  .user-nav-btn {
    padding: 6px 10px;
    font-size: 12px;
  }
  
}