:root{--el-color-primary: #1677FF;--el-color-success: #16A34A;--el-color-warning: #EA580C;--el-color-danger: #DC2626;--page-bg: #F5F7FA;--border: #E5E7EB;--text: #111827;--muted: #6B7280}*{box-sizing:border-box}body{margin:0;color:var(--text);font:14px/1.5 Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--page-bg)}button{font:inherit}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:var(--page-bg)}.login-card{width:min(400px,100%);padding:32px;background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:0 1px 2px #0000000a}.brand-mark{width:40px;height:40px;display:grid;place-items:center;margin:0 auto 12px;border-radius:4px;background:#1677ff;color:#fff;font-size:22px;font-weight:700}.login-card h1{margin:0;text-align:center;font-size:20px}.login-subtitle,.version{display:block;color:var(--muted);text-align:center}.login-subtitle{margin:4px 0 24px}.version{margin-top:20px}.form-error{margin:-4px 0 12px;color:var(--el-color-danger)}.login-button{width:100%}.admin-shell{min-height:100vh;padding-top:56px;padding-left:220px;transition:padding-left .2s ease}.admin-shell.collapsed{padding-left:64px}.topbar{height:56px;position:fixed;inset:0 0 auto;z-index:10;display:flex;align-items:center;gap:12px;padding:0 24px;background:#fff;border-bottom:1px solid var(--border)}.topbar-spacer{flex:1}.user-name{color:#374151}.icon-button{border:0;background:transparent;cursor:pointer;font-size:18px}.sidebar{position:fixed;inset:56px auto 0 0;width:220px;padding:16px 8px;background:#fff;border-right:1px solid var(--border);overflow-y:auto}.collapsed .sidebar{width:64px}.collapsed .sidebar .menu-group,.collapsed .sidebar .menu-link{overflow:hidden;white-space:nowrap;text-indent:-9999px}.menu-group{padding:12px 12px 6px;color:var(--muted);font-size:12px}.menu-link{display:block;padding:8px 12px;color:#374151;border-radius:4px;text-decoration:none}.menu-link.child{padding-left:24px}.menu-link:hover,.menu-link.active{color:#1677ff;background:#e6f4ff}.content{min-height:calc(100vh - 56px);padding:24px}.page-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:24px}.page-header h1{margin:0 0 4px;font-size:20px}.page-header p{margin:0;color:var(--muted)}.stat-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;margin-bottom:24px}.stat-label,.muted{display:block;color:var(--muted)}.stat-value{display:block;margin:8px 0;font-size:24px}.empty-card{min-height:280px}.center-state{min-height:calc(100vh - 104px);display:grid;place-items:center}@media(max-width:900px){.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.content{padding:16px}}@media(max-width:640px){.admin-shell{padding-left:0}.sidebar{width:0;padding:16px 0;overflow:hidden;border:0}.admin-shell:not(.collapsed) .sidebar{width:220px;z-index:9;box-shadow:4px 0 12px #0000001f}.admin-shell:not(.collapsed){padding-left:0}.stat-grid{grid-template-columns:1fr}.topbar{padding:0 16px}}