/* ====== Layout: Topbar, Sidebar, Main ====== */
.topbar{height:48px;background:#fff;display:flex;align-items:center;padding:0 24px;justify-content:space-between;flex-shrink:0;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.topbar-left{display:flex;align-items:center;gap:12px}
.topbar-logo{font-size:17px;font-weight:700;color:var(--text);letter-spacing:-.3px;cursor:pointer}
.topbar-toggle{display:flex;gap:4px;background:var(--bg);border-radius:20px;padding:3px;margin-left:20px}
.toggle-btn{padding:6px 18px;border-radius:18px;border:none;cursor:pointer;font-size:13px;background:transparent;color:var(--text2);transition:all var(--transition);font-weight:500}
.toggle-btn.active{background:var(--pri);color:#fff;box-shadow:var(--shadow)}
.topbar-right{display:flex;align-items:center;gap:14px;color:var(--text2);font-size:13px}
.topbar-user{display:flex;align-items:center;gap:8px;cursor:pointer;padding:4px 12px;border-radius:20px;transition:background var(--transition)}
.topbar-user:hover{background:var(--bg)}
.topbar-user-avatar{width:28px;height:28px;border-radius:50%;background:var(--pri);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600}
.topbar-logout{color:var(--text3);cursor:pointer;font-size:12px;padding:4px 10px;border-radius:6px;transition:all var(--transition)}
.topbar-logout:hover{color:var(--dan);background:var(--dan-lt)}

.app{display:flex;height:calc(100vh - 48px)}
.sidebar{width:210px;background:var(--sidebar-bg);border-right:1px solid var(--border);flex-shrink:0;overflow-y:auto;padding:14px 0}
.nav-group{padding:0 14px;margin-bottom:6px}
.nav-group-title{font-size:10px;text-transform:uppercase;letter-spacing:.8px;color:var(--text3);padding:14px 6px 6px;font-weight:600}
.nav-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:8px;cursor:pointer;font-size:13px;transition:all .12s;margin:1px 0;color:var(--text2);font-weight:450}
.nav-item:hover{background:var(--pri-lt);color:var(--text)}
.nav-item.active{background:var(--pri-lt);color:var(--pri);font-weight:600}
.nav-icon{width:18px;text-align:center;font-size:14px;opacity:.8}
.main{flex:1;overflow-y:auto;padding:28px 32px;background:#fff}

/* Dark sidebar theme */
#backendLayout .sidebar{background:#1a1d28;border-color:#2d3040}
#backendLayout .nav-group-title{color:#5c5e6a}
#backendLayout .nav-item{color:#8b8d97}
#backendLayout .nav-item:hover{background:rgba(108,140,255,.1);color:#e4e6eb}
#backendLayout .nav-item.active{background:rgba(108,140,255,.15);color:#6c8cff}

/* Mall frontend layout */
.mall-wrap{display:none;flex-direction:column;background:#fff}
.mall-wrap.active{display:flex}
.mall-top{height:56px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 36px;gap:28px;flex-shrink:0;position:sticky;top:48px;z-index:90}
.mall-logo{font-size:19px;font-weight:700;color:var(--pri);letter-spacing:-.3px;cursor:pointer}
.mall-search{flex:1;max-width:480px;position:relative}
.mall-search input{width:100%;padding:9px 16px 9px 38px;border-radius:22px;border:1px solid var(--border);font-size:13px;outline:none;background:var(--bg)}
.mall-search input:focus{border-color:var(--pri)}
.mall-search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text3);font-size:14px}
.mall-nav{display:flex;gap:24px;font-size:13px;color:var(--text2)}
.mall-nav span{cursor:pointer;padding:4px 0;border-bottom:2px solid transparent;font-weight:450;transition:all var(--transition)}
.mall-nav span.active{color:var(--pri);border-color:var(--pri);font-weight:600}
.mall-actions{display:flex;gap:12px;align-items:center;margin-left:auto}
.mall-lang{font-size:12px;color:var(--text2);cursor:pointer;display:flex;align-items:center;gap:4px}
.mall-cart{position:relative;cursor:pointer;font-size:16px}
.mall-cart-badge{position:absolute;top:-6px;right:-8px;background:var(--dan);color:#fff;font-size:10px;width:16px;height:16px;border-radius:50%;display:flex;align-items:center;justify-content:center}
.mall-content{padding:28px 36px;flex:1;overflow-y:auto}
.mall-footer{background:#1c1b18;color:#a8a59d;padding:48px 36px 28px}
.mall-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:32px}
.mall-footer h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:14px}
.mall-footer a{color:#a8a59d;text-decoration:none;font-size:13px;display:block;margin-bottom:8px;transition:color var(--transition)}
.mall-footer a:hover{color:#fff}
.mall-footer-bottom{border-top:1px solid #333;padding-top:20px;display:flex;justify-content:space-between;font-size:12px}