:root{--bg:#f4f5f7;--card:#fff;--text:#1a1a1a;--text-dim:#8a8f98;--border:#e5e7eb;--accent:#3b5bdb;--plus:#2f9e44;--minus:#e03131;--nav-h:60px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Apple SD Gothic Neo,Segoe UI,Roboto,sans-serif}.app-shell{background:var(--bg);flex-direction:column;max-width:480px;min-height:100%;margin:0 auto;display:flex;position:relative}.app-header{background:var(--card);border-bottom:1px solid var(--border);z-index:10;justify-content:center;align-items:center;gap:16px;padding:14px 16px;display:flex;position:sticky;top:0}.app-header button{color:var(--text-dim);cursor:pointer;background:0 0;border:none;padding:4px 8px;font-size:20px}.app-header .month-label{text-align:center;min-width:96px;font-size:17px;font-weight:600}.app-main{padding:16px;padding-bottom:calc(var(--nav-h) + 24px);flex:1}.bottom-nav{max-width:480px;height:var(--nav-h);background:var(--card);border-top:1px solid var(--border);margin:0 auto;display:flex;position:fixed;bottom:0;left:0;right:0}.bottom-nav a{color:var(--text-dim);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:3px;font-size:12px;text-decoration:none;display:flex}.bottom-nav a.active{color:var(--accent);font-weight:600}.bottom-nav .nav-icon{font-size:20px;line-height:1}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;margin-bottom:12px;padding:16px}.section-title{color:var(--text-dim);margin:20px 4px 8px;font-size:13px;font-weight:600}.plus{color:var(--plus)}.minus{color:var(--minus)}.muted{color:var(--text-dim)}.offline-bar{color:#fff;text-align:center;background:#495057;padding:8px;font-size:13px}.items-grid{display:block}.sidebar{display:none}@media (width>=900px){body{background:var(--bg)}.app-shell{flex-direction:row;align-items:stretch;max-width:1160px;min-height:100vh;margin:0 auto}.sidebar{background:var(--card);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;width:240px;height:100vh;padding:20px 16px;display:flex;position:sticky;top:0}.sidebar-logo{align-items:center;gap:10px;padding:8px 10px 20px;font-size:20px;font-weight:700;display:flex}.sidebar-mark{background:var(--accent);color:#fff;border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;font-size:18px;display:inline-flex}.sidebar-nav{flex-direction:column;gap:4px;display:flex}.sidebar-nav a{color:var(--text-dim);border-radius:10px;align-items:center;gap:12px;padding:12px 14px;font-size:15px;font-weight:500;text-decoration:none;display:flex}.sidebar-nav a:hover{background:var(--bg)}.sidebar-nav a.active{color:var(--accent);background:#e7ecfd;font-weight:700}.sidebar-nav .nav-icon{font-size:18px}.bottom-nav{display:none}.app-body{flex-direction:column;flex:1;min-width:0;display:flex}.app-header{justify-content:flex-start;padding:18px 32px}.app-main{width:100%;max-width:900px;padding:24px 32px 48px}.items-grid{grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.items-grid .card{margin-bottom:0}}