/* ==========================================================================
   注会陪跑 · 智能管理中台 - 页面布局与导航架构样式 (Layout & Navigation)
   ========================================================================== */

/* 登录页面全屏背景 */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 10% 20%, rgb(15, 23, 42) 0%, rgb(30, 41, 59) 90%);
  padding: 24px;
  position: relative;
  overflow: hidden;
}
.login-container::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.25) 0%, rgba(6, 182, 212, 0.05) 70%, transparent 100%);
  top: -100px;
  right: -100px;
  border-radius: 50%;
  filter: blur(50px);
}
.login-box {
  width: 100%;
  max-width: 440px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.3);
  position: relative;
  z-index: 10;
  animation: fadeIn 0.4s ease-out;
}
.brand-header {
  text-align: center;
  margin-bottom: 32px;
}
.brand-logo {
  width: 56px;
  height: 56px;
  background: var(--accent-gradient);
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 16px;
  box-shadow: 0 10px 20px -5px rgba(79, 70, 229, 0.4);
}
.brand-title {
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: #0f172a;
  letter-spacing: -0.5px;
}
.brand-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 后台主框架布局 */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* 左侧边栏 */
.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  color: #94a3b8;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}
.sidebar-header {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.sidebar-logo {
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 18px;
}
.sidebar-title {
  font-family: 'Outfit', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: #f8fafc;
}
.sidebar-badge {
  font-size: 10px;
  background: rgba(79, 70, 229, 0.3);
  color: #a5b4fc;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}
.sidebar-nav {
  padding: 16px 12px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  color: #94a3b8;
}
.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #f8fafc;
}
.nav-item.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}
.nav-icon {
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
}
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.admin-profile {
  display: flex;
  align-items: center;
  gap: 10px;
}
.admin-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #334155;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f8fafc;
  font-weight: 700;
  font-size: 13px;
  overflow: hidden;
}
.admin-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.admin-info-name {
  font-size: 13px;
  font-weight: 600;
  color: #f8fafc;
}
.admin-info-role {
  font-size: 11px;
  color: #64748b;
}
.logout-btn {
  background: transparent;
  border: none;
  color: #94a3b8;
  cursor: pointer;
  font-size: 16px;
  transition: var(--transition);
}
.logout-btn:hover {
  color: var(--danger);
}

/* 右侧主体工作区 */
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--bg-main);
}
.top-header {
  height: 64px;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}
.header-title {
  font-weight: 700;
  color: var(--text-main);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #f1f5f9;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  color: #475569;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
}
.content-area {
  padding: 28px;
  flex: 1;
}

/* 统计卡片网格系统 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 16px;
}
.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.stat-value {
  font-family: 'Outfit', sans-serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}
.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}