:root{
  --bg: #0f1417;
  --card-bg: #16181a;
  --text: #e6eef0;
  --muted: #9aa5a8;
  --accent: #2ea44f;
  --accent-text: #ffffff;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;
  background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;
}
.app{max-width:980px;margin:18px auto;padding:16px}
.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.title{font-size:18px;margin:0}
.tabs{display:flex;gap:8px}
.tab{background:transparent;border:1px solid transparent;color:var(--muted);padding:8px 12px;border-radius:8px;cursor:pointer}
.tab.active{background:var(--card-bg);color:var(--text);border-color:rgba(255,255,255,0.04)}
.content{background:transparent;padding:8px}
.tab-content{display:none}
.tab-content.active{display:block}
.stats-cards{display:flex;gap:12px;flex-wrap:wrap}
.card{background:var(--card-bg);padding:14px;border-radius:10px;min-width:140px;flex:1}
.card-title{font-size:12px;color:var(--muted)}
.card-value{font-size:20px;margin-top:6px}
.setting-row{margin-top:12px;display:flex;flex-direction:column;gap:6px}
input[type=text]{background:#0b0d0e;border:1px solid rgba(255,255,255,0.04);color:var(--text);padding:8px;border-radius:8px}
.btn{margin-top:12px;background:var(--accent);color:var(--accent-text);border:none;padding:10px 14px;border-radius:8px;cursor:pointer}
.footer{margin-top:18px;text-align:center;color:var(--muted)}
.switch{display:inline-flex;align-items:center;gap:10px;cursor:pointer}
.switch input{display:none}
.slider{width:36px;height:20px;background:#222;border-radius:999px;position:relative}
.slider:after{content:'';position:absolute;left:2px;top:2px;width:16px;height:16px;background:#fff;border-radius:50%;transition:transform .18s}
.switch input:checked + .slider{background:var(--accent)}
.switch input:checked + .slider:after{transform:translateX(16px)}
@media (max-width:560px){.stats-cards{flex-direction:column}}