/* ===================================================
   sidebar.css —— 主页可收缩侧边栏布局（复刻原始工具站风格）
   深蓝侧边栏 #1a2b4a，强调色 #4e9af1
   配合 bootstrap.php 的 echo_header($withSidebar=true) 使用
   =================================================== */

:root {
  --primary:        #4e9af1;
  --primary-light:  rgba(78,154,241,0.15);
  --primary-dark:   #2d7dd2;

  --sidebar-bg:     #1a2b4a;   /* 侧边栏深蓝底 */
  --sidebar-bg2:    #1b3462;
  --sidebar-active: #2a4a80;
  --sidebar-hover:  rgba(255,255,255,0.07);
  --sidebar-border: rgba(255,255,255,0.08);
  --sidebar-text:   rgba(255,255,255,0.75);
  --sidebar-text-a: #ffffff;
  --sidebar-label:  rgba(255,255,255,0.35);

  --sidebar-w:      220px;
  --header-h:       48px;
  --bg:             #eef1f8;
  --white:          #ffffff;
  --text1:          #1a2540;
  --text2:          #4a5578;
  --text3:          #8e99b5;
  --border:         1px solid #dde3ef;
}

/* ===== 布局 ===== */
.layout { display: flex; min-height: 100vh; }

/* ===== 侧边栏 ===== */
/* 性能：仅过渡 width（侧边栏自身节点少，重排开销低）；transform 供移动端抽屉使用 */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform 0.3s, width 0.3s;
  box-shadow: 2px 0 12px rgba(0,0,0,0.2);
}
.sidebar-header {
  height: var(--header-h);
  display: flex;
  align-items: center;
  padding: 0 16px;
  border-bottom: 1px solid var(--sidebar-border);
  gap: 10px;
  flex-shrink: 0;
  background: var(--sidebar-bg2);
}
.sidebar-header .logo-icon {
  width: 34px; height: 34px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: transparent;
}
.sidebar-header .logo-icon i.fas { font-size: 24px; color: #f5c342; }
.sidebar-header .logo-name  { font-size: 14px; font-weight: 700; color: var(--sidebar-text-a); letter-spacing: 0.5px; }
.sidebar-header .logo-sub   { font-size: 10px; color: #f5c342; margin-top: 2px; letter-spacing: 0.3px; }

.sidebar-toggle {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--sidebar-text);
  border-radius: 6px;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sidebar-toggle:hover { background: var(--sidebar-hover); color: var(--sidebar-text-a); }
.sidebar-toggle i.fas { font-size: 16px; }

.nav-scroll { flex: 1; overflow-y: auto; padding: 10px 8px; }
.nav-scroll::-webkit-scrollbar { width: 4px; }
.nav-scroll::-webkit-scrollbar-track { background: transparent; }
.nav-scroll::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

.nav-section { margin-bottom: 8px; }
.nav-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--sidebar-label);
  letter-spacing: 1px;
  padding: 0 10px;
  margin-bottom: 6px;
  margin-top: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-label .nav-toggle { font-size: 10px; transition: transform 0.2s; opacity: 0.5; }
.nav-section.collapsed .nav-toggle { transform: rotate(-90deg); }
.nav-section.collapsed > .nav-item { display: none; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--sidebar-text);
  font-size: 13.5px;
  transition: all 0.15s;
  margin-bottom: 2px;
  user-select: none;
  position: relative;
}
.nav-item:hover  { background: var(--sidebar-hover); color: var(--sidebar-text-a); }
.nav-item.active {
  background: var(--sidebar-active);
  color: var(--sidebar-text-a);
  font-weight: 600;
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 20%; bottom: 20%;
  width: 3px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}
.nav-item i.fas { width: 16px; height: 16px; flex-shrink: 0; opacity: 0.85; text-align: center; }
.nav-item.active i.fas { opacity: 1; }
.nav-count {
  margin-left: auto;
  background: rgba(78,154,241,0.2);
  color: var(--primary);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}
.nav-item.active .nav-count { background: rgba(78,154,241,0.3); }

/* ===== 主内容 ===== */
/* 性能：main-content 不做 margin-left 过渡——点击瞬间就位（iframe 仅一次 reflow），
   侧边栏以 0.3s 宽度渐变扫过/让出内容，动画期间 iframe 零持续重排（每帧 reflow 是收缩卡顿根因） */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding-top: var(--header-h);
  box-sizing: border-box;
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--bg);
}

/* ===== 顶部栏 ===== */
.topbar {
  height: var(--header-h);
  background: var(--white);
  border-bottom: var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  position: fixed;
  top: 0; left: var(--sidebar-w); right: 0;
  z-index: 50;
  gap: 12px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
}
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; color: var(--text2); }
.menu-toggle i.fas { font-size: 16px; }
.breadcrumb {
  font-size: 13px;
  color: var(--text3);
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.bread-main { font-size: 18px; font-weight: 800; color: var(--primary-dark); }
.bread-icon { font-size: 16px; color: var(--primary-dark); margin-right: 2px; }
.bread-sub { font-size: 13px; color: var(--text3); }
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex-wrap: wrap;
}
/* 顶栏搜索框 */
.topbar-search {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 420px;
  margin-left: 12px;
  background: #f5f7fa;
  border: 1px solid #e2e8f0;
  border-radius: 20px;
  padding: 6px 14px;
  transition: border-color 0.2s, background 0.2s;
}
.topbar-search:focus-within { border-color: #055076; background: #fff; }
.topbar-search i { color: #94a3b8; font-size: 13px; }
.topbar-search input { border: none; outline: none; background: transparent; font-size: 13px; width: 100%; color: #1e293b; }
.topbar-search input::placeholder { color: #94a3b8; }

/* ===== 页面内容区 ===== */
.page-wrap {
  flex: 1;
  padding: 16px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.page-header .stats {
  text-align: right;
  margin-bottom: 0;
  flex-shrink: 0;
}
.search-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: white;
  border: 1px solid #d0d9ee;
  border-radius: 8px;
  padding: 9px 16px;
  width: 480px;
  max-width: 100%;
  transition: border 0.2s, box-shadow 0.2s;
}
.search-wrap:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(78,154,241,0.12); }
.search-wrap i.fas { width: 15px; height: 15px; color: var(--text3); flex-shrink: 0; }
.search-wrap input {
  border: none; outline: none; font-size: 13px;
  width: 100%; background: transparent; color: var(--text1);
}

/* ===== 底部版权 ===== */
.main-content .site-footer {
  text-align: center;
  font-size: 12px;
  color: var(--text3);
  padding: 16px 24px;
  border-top: 1px solid #dde3ef;
  margin-top: auto;
  line-height: 1.6;
  background: var(--white);
}

/* ===== 侧边栏遮罩（移动端） ===== */
.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
}
.sidebar-overlay.open { display: block; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .topbar { left: 0; padding: 0 12px; }
  .menu-toggle { display: flex; }
  .page-wrap { padding: 16px; }
  .search-wrap { width: 100%; }
  .sidebar-toggle { display: none; }
  .bread-sub { display: none; }
  .topbar-search { max-width: none; margin-left: 4px; }
  .topbar-search input { font-size: 12px; }
}

/* ===== 侧边栏收缩状态（桌面端） ===== */
.sidebar.collapsed { width: 56px; }
.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .nav-label,
.sidebar.collapsed .nav-count,
.sidebar.collapsed .nav-text { display: none; }
.sidebar.collapsed .sidebar-header { justify-content: center; padding: 0 8px; gap: 0; }
.sidebar.collapsed .logo-icon { margin: 0 auto; }
.sidebar.collapsed .sidebar-toggle { margin: 0 auto; }
.sidebar.collapsed .nav-item { justify-content: center; padding: 9px 0; gap: 0; }
.sidebar.collapsed .nav-item i.fas { margin: 0 auto; }
.sidebar.collapsed ~ .main-content { margin-left: 56px; }
.sidebar.collapsed ~ .main-content .topbar { left: 56px; }

/* ===== 工具内嵌预览（iframe） ===== */
.frame-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid #d0d9ee;
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 12.5px;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.15s;
  flex-shrink: 0;
}
.frame-back:hover { border-color: var(--primary); color: var(--primary); }
.frame-back i.fas { font-size: 12px; }
.tool-frame-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.tool-frame-wrap iframe {
  flex: 1;
  width: 100%;
  min-height: calc(100vh - var(--header-h) - 32px);
  border: none;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 1px 6px rgba(0,0,0,0.08);
}

/* 移动端不展示收缩按钮 */
@media (max-width: 768px) {
  .sidebar-toggle { display: none; }
}