/* ── BASE / RESET ─────────────────────────────────────────── */
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;-webkit-font-smoothing:antialiased}
html,body{width:100%;height:100%;overflow:hidden}
body{font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Helvetica Neue',sans-serif;background:#ededed;color:#191919;position:fixed;inset:0}

/* ── Avatar colors ────────────────────────────────────────── */
.c0{background:#5B8FE0}.c1{background:#E07A5B}.c2{background:#3D9970}
.c3{background:#E0B85B}.c4{background:#9B59B6}.c5{background:#E05B8F}
.c6{background:#5BC0E0}.c7{background:#E05B5B}.c8{background:#5BE0B8}
.c9{background:#8FE05B}.me-av{background:#07C160}

/* ── App container ───────────────────────────────────────── */
#app{position:fixed;inset:0;overflow:hidden;display:none}
#app.visible{display:block}

/* ── Tab Bar ─────────────────────────────────────────────── */
#tab-bar{position:absolute;bottom:0;left:0;right:0;height:50px;display:flex;background:#f7f7f7;border-top:1px solid #d8d8d8;padding-bottom:max(env(safe-area-inset-bottom),0px);z-index:200}
.tab-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:6px 0 4px;cursor:pointer;-webkit-tap-highlight-color:transparent;transition:color .15s}
.tab-icon{font-size:22px;line-height:1}
.tab-label{font-size:10px;margin-top:2px;font-weight:500;color:#999}
.tab-item.active .tab-label{color:#07C160;font-weight:700}
.tab-item.active .tab-icon{transform:scale(1.08)}

/* ── Tab Pages ───────────────────────────────────────────── */
.tab-page{position:absolute;top:0;left:0;right:0;bottom:50px;display:none;flex-direction:column;overflow:hidden}
.tab-page.active{display:flex}
#tab-copyright iframe{width:100%;height:100%;border:none;display:block}

/* ── Empty placeholder ───────────────────────────────────── */
.tab-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#ccc}
.tab-empty-icon{font-size:56px;margin-bottom:12px}
.tab-empty-text{font-size:15px}