*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:#0b0c10;color:#eaf0f1}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:#11131a;border-bottom:1px solid #2a2f3a}
.brand{font-weight:700;letter-spacing:.3px}
.user{display:flex;gap:8px;align-items:center}
.btn{background:#1f6feb;border:0;border-radius:10px;color:#fff;padding:8px 12px;font-weight:600;cursor:pointer}
.tabs{display:flex;gap:6px;padding:10px 10px;background:#0f1117;border-bottom:1px solid #232938;position:sticky;top:0}
.tab{background:#171923;color:#cbd5e1;border:1px solid #232938;padding:8px 12px;border-radius:10px;cursor:pointer}
.tab.active{background:#1f6feb;color:#fff;border-color:#1f6feb}
main{padding:18px;max-width:980px;margin:0 auto}
.panel{display:none;background:#0f1117;border:1px solid #232938;border-radius:14px;padding:18px}
.panel.active{display:block}
h1{margin-top:0;color:#fff}