:root{
  --bg:#0b1220;
  --panel:#0f1a2e;
  --card:#121f36;
  --text:#e6eefc;
  --muted:#9db0d0;
  --brand:#5b8cff;
  --danger:#ff5b6b;
  --border:rgba(255,255,255,.10);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius:14px;
  --radius-sm:10px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font);
  background:radial-gradient(1200px 800px at 20% 10%, rgba(91,140,255,.25), transparent 40%),
             radial-gradient(900px 600px at 90% 10%, rgba(255,91,107,.18), transparent 35%),
             var(--bg);
  color:var(--text);
}
a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:24px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:10px;
  padding:10px 14px;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.04);
  color:var(--text);
  cursor:pointer;
}
.btn.primary{background:linear-gradient(135deg, rgba(91,140,255,.95), rgba(91,140,255,.55));border-color:rgba(91,140,255,.35)}
.btn.danger{background:linear-gradient(135deg, rgba(255,91,107,.95), rgba(255,91,107,.55));border-color:rgba(255,91,107,.35)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.input, textarea{
  width:100%;
  padding:12px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  color:var(--text);
  outline:none;
}
.input:focus, textarea:focus{border-color:rgba(91,140,255,.55);box-shadow:0 0 0 3px rgba(91,140,255,.18)}
.label{display:block;font-size:13px;color:var(--muted);margin:10px 0 6px}
.card{
  background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.03));
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.card .card-body{padding:18px}
.flash{padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:rgba(91,140,255,.12);color:var(--text);margin-bottom:14px}
.flash.err{background:rgba(255,91,107,.12)}

/* Guest layout */
.guest-wrap{min-height:100%;display:grid;place-items:center;padding:24px}
.auth-card{width:min(440px, 100%);padding:18px}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.brand .logo{
  width:40px;height:40px;border-radius:12px;
  background:linear-gradient(135deg, rgba(91,140,255,1), rgba(255,91,107,.8));
}
.brand h1{font-size:16px;margin:0}
.sub{color:var(--muted);font-size:13px;margin:6px 0 0}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.stack{display:flex;flex-direction:column;gap:10px}
.hint{color:var(--muted);font-size:12px}

/* App layout */
.app-shell{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.sidebar{
  background:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border-right:1px solid var(--border);
  padding:18px;
  position:sticky;top:0;height:100vh;
}
.side-title{font-size:14px;margin:8px 0 0}
.side-meta{color:var(--muted);font-size:12px;margin-top:6px}
.nav{margin-top:18px;display:flex;flex-direction:column;gap:8px}
.nav a{
  padding:10px 12px;border-radius:12px;border:1px solid transparent;color:var(--muted);
}
.nav a.active, .nav a:hover{
  color:var(--text);
  border-color:var(--border);
  background:rgba(255,255,255,.03);
}
.main{padding:22px}
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.page-title{font-size:18px;margin:0}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;border:1px solid var(--border);color:var(--muted);font-size:12px}
.grid{display:grid;grid-template-columns:repeat(12, 1fr);gap:14px}
.col-6{grid-column:span 6}
.col-12{grid-column:span 12}
.stat{padding:14px}
.stat .k{color:var(--muted);font-size:12px}
.stat .v{font-size:20px;margin-top:8px}

@media (max-width: 900px){
  .app-shell{grid-template-columns:1fr}
  .sidebar{position:relative;height:auto}
}