*{box-sizing:border-box;margin:0;padding:0}body{color:#1e293b;-webkit-tap-highlight-color:transparent;background:#fff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.app-container{flex-direction:column;min-height:100vh;padding-bottom:70px;display:flex}.main-content{flex:1;overflow-y:auto}.bottom-nav{background:#fff;border-top:1px solid #e2e8f0;justify-content:space-around;align-items:center;height:64px;display:flex;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -2px 10px #0000000d}.nav-item{color:#94a3b8;flex-direction:column;flex:1;justify-content:center;align-items:center;min-width:44px;min-height:44px;padding:8px 0;font-size:12px;text-decoration:none;transition:color .2s;display:flex}.nav-item.active{color:#0f172a;font-weight:600}