/* +----------------------------------------------------------------------
   | 后台框架布局（管理后台 / 商家后台 共用）
   +---------------------------------------------------------------------- */

/* 整体骨架 */
.layout { display: flex; min-height: 100vh; }

/* --- 侧边栏 --- */
.sidebar {
  width: 232px; flex-shrink: 0; background: var(--card); border-right: 1px solid var(--line);
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; z-index: 30;
  transition: width .2s;
}
.sidebar.collapsed { width: 64px; }
.sidebar.collapsed .nav-txt, .sidebar.collapsed .nav-group-title, .sidebar.collapsed .side-logo span { display: none; }
.sidebar.collapsed .nav-item { justify-content: center; padding: 10px 0; }

.side-logo {
  height: 60px; display: flex; align-items: center; gap: 10px; padding: 0 18px;
  border-bottom: 1px solid var(--line); flex-shrink: 0; overflow: hidden;
}
.side-logo .logo {
  width: 32px; height: 32px; border-radius: 9px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 17px;
}
.side-logo img { width: 32px; height: 32px; object-fit: contain; }
.side-logo span { font-weight: 800; font-size: 17px; color: var(--brand); white-space: nowrap; }

.side-nav { flex: 1; overflow-y: auto; padding: 10px 10px 24px; }
.nav-group-title {
  font-size: 11px; color: var(--ink-3); font-weight: 700; padding: 14px 12px 6px;
  letter-spacing: .5px; text-transform: uppercase;
}
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px;
  color: var(--muted); font-size: 14px; font-weight: 500; margin-bottom: 2px; transition: .15s;
}
.nav-item i { font-size: 17px; width: 20px; text-align: center; flex-shrink: 0; }
.nav-item:hover { background: var(--tint); color: var(--brand-2); }
.nav-item.on { background: var(--brand); color: #fff; font-weight: 600; box-shadow: 0 2px 8px rgba(29,158,117,.28); }
.nav-item.on:hover { background: var(--brand-2); color: #fff; }
.nav-item .badge {
  margin-left: auto; background: var(--danger); color: #fff; font-size: 11px; font-weight: 700;
  min-width: 18px; height: 18px; border-radius: 9px; display: inline-flex; align-items: center; justify-content: center; padding: 0 5px;
}
.nav-item.on .badge { background: rgba(255,255,255,.28); }

/* --- 主区域 --- */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  height: 60px; background: var(--card); border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; padding: 0 20px;
  position: sticky; top: 0; z-index: 20; flex-shrink: 0;
}
.topbar .left { display: flex; align-items: center; gap: 12px; }
.topbar .right { display: flex; align-items: center; gap: 14px; }
.icon-btn {
  width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--line); background: var(--card);
  display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--muted); font-size: 17px;
  transition: .15s;
}
.icon-btn:hover { border-color: var(--brand); color: var(--brand); }
.store-switch { display: flex; align-items: center; gap: 6px; padding: 6px 12px; border: 1px solid var(--line);
  border-radius: 10px; cursor: pointer; font-size: 13px; font-weight: 600; }
.store-switch:hover { border-color: var(--brand); color: var(--brand); }

/* 用户下拉 */
.user-menu { position: relative; }
.user-menu .trigger { display: flex; align-items: center; gap: 8px; cursor: pointer; padding: 4px 8px; border-radius: 10px; }
.user-menu .trigger:hover { background: var(--tint); }
.dropdown {
  position: absolute; right: 0; top: calc(100% + 8px); min-width: 170px; background: var(--card);
  border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 6px; display: none; z-index: 40;
}
.dropdown.show { display: block; }
.dropdown a { display: flex; align-items: center; gap: 9px; padding: 9px 12px; border-radius: 8px; font-size: 14px; color: var(--muted); }
.dropdown a:hover { background: var(--tint); color: var(--brand-2); }
.dropdown hr { border: 0; border-top: 1px solid var(--line); margin: 6px 4px; }

.content { padding: 22px; flex: 1; }

/* 主题选择面板 */
.theme-panel { position: fixed; right: -260px; top: 0; width: 260px; height: 100vh; background: var(--card);
  border-left: 1px solid var(--line); box-shadow: var(--shadow); z-index: 100; transition: right .22s; padding: 20px; overflow-y: auto; }
.theme-panel.open { right: 0; }
.theme-panel h4 { margin: 0 0 14px; font-size: 15px; display: flex; align-items: center; justify-content: space-between; }
.theme-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 10px; }
.theme-item { border: 1px solid var(--line); border-radius: 12px; padding: 10px; cursor: pointer; text-align: center; font-size: 13px; }
.theme-item:hover { border-color: var(--brand); }
.theme-item.on { border-color: var(--brand); border-width: 2px; }
.theme-item .sw { height: 34px; border-radius: 8px; margin-bottom: 8px; }

/* 登录页 */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px;
  background: radial-gradient(1100px 520px at 85% -10%, rgba(232,179,57,.16), transparent),
              linear-gradient(180deg, #fff, var(--bg));
}
.login-box { display: grid; grid-template-columns: 1fr 1fr; max-width: 900px; width: 100%;
  background: var(--card); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.login-side { background: linear-gradient(160deg, var(--brand), var(--brand-deep)); color: #fff; padding: 40px 36px;
  display: flex; flex-direction: column; justify-content: center; }
.login-side h1 { font-size: 26px; margin: 0 0 12px; font-weight: 800; }
.login-side p { opacity: .9; font-size: 14px; line-height: 1.9; margin: 0; }
.login-side .feats { margin-top: 26px; display: flex; flex-direction: column; gap: 12px; }
.login-side .feats div { display: flex; align-items: center; gap: 10px; font-size: 14px; opacity: .95; }
.login-side .feats i { font-size: 18px; }
.login-form { padding: 40px 36px; }
.login-form h2 { margin: 0 0 6px; font-size: 22px; font-weight: 800; }
.login-form .sub { color: var(--ink-3); font-size: 14px; margin-bottom: 26px; }
.login-tabs { display: flex; gap: 22px; border-bottom: 1px solid var(--line); margin-bottom: 22px; }
.login-tabs a { padding: 8px 0 12px; font-weight: 600; color: var(--ink-3); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.login-tabs a.on { color: var(--brand); border-color: var(--brand); }
@media (max-width: 860px) {
  .login-box { grid-template-columns: 1fr; }
  .login-side { display: none; }
  .sidebar { position: fixed; left: -240px; height: 100vh; box-shadow: var(--shadow); }
  .sidebar.mobile-open { left: 0; }
}