:root{
  --bg:#f6f7fb; --card:#fff; --text:#0f172a; --muted:#64748b;
  --border:#e5e7eb; --primary:#ff6a00; --dark:#0b1220; --radius:16px;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,Segoe UI,Arial;background:var(--bg);color:var(--text)}
a{text-decoration:none;color:inherit}

.shell{display:flex;min-height:100vh}
.sidebar{
  width:265px;background:var(--dark);color:#e5e7eb;padding:14px;
  position:sticky;top:0;height:100vh;overflow:auto
}
.brand{font-weight:900;font-size:18px;margin:8px 6px 14px}
.brand small{display:block;font-weight:600;opacity:.7;margin-top:4px;font-size:12px}
.nav{display:flex;flex-direction:column;gap:6px}
.nav-title{margin:14px 6px 6px;font-size:12px;text-transform:uppercase;letter-spacing:.12em;opacity:.7}
.link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 10px;border-radius:12px;color:#e5e7eb;
  border:1px solid rgba(255,255,255,.06);background:rgba(255,255,255,.02)
}
.link:hover{background:rgba(255,255,255,.06)}
.link.active{background:rgba(255,106,0,.14);border-color:rgba(255,106,0,.35)}
.sub{font-size:12px;opacity:.7}

.main{flex:1;padding:18px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.topbar h1{margin:0;font-size:22px}
.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:14px;box-shadow:0 10px 30px rgba(0,0,0,.03)
}
.grid{display:grid;gap:12px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:1000px){.stats{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.stats{grid-template-columns:1fr}}

.stat{padding:14px;border-radius:16px;border:1px solid rgba(255,106,0,.18);
  background:linear-gradient(180deg, rgba(255,106,0,.10), rgba(255,255,255,1))}
.stat .label{font-size:12px;color:var(--muted)}
.stat .value{font-size:26px;font-weight:900;margin-top:4px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 14px;border-radius:12px;border:1px solid var(--border);cursor:pointer;font-weight:800}
.btn-primary{background:var(--primary);border-color:rgba(255,106,0,.55);color:#fff}
.btn-dark{background:#111827;border-color:rgba(255,255,255,.08);color:#fff}
.btn-ghost{background:#fff}
.muted{color:var(--muted)}
.small{font-size:12px}
.hr{height:1px;background:var(--border);margin:12px 0}