:root{--bg:#0b0f14;--card:#111827;--muted:#9ca3af;--text:#e5e7eb;--line:#1f2937;--btn:#2563eb}
*{box-sizing:border-box}
body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial;background:radial-gradient(1200px 600px at 20% 10%, #0f172a 0%, var(--bg) 60%);color:var(--text)}
.topbar{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line);background:rgba(11,15,20,.75);backdrop-filter:blur(12px)}
.brand{display:flex;gap:10px;align-items:center;font-weight:800}
.logo{width:28px;height:28px;border-radius:10px;background:linear-gradient(135deg,var(--btn),#7c3aed)}
.brandlink{color:inherit;text-decoration:none}
.nav{display:flex;gap:10px;align-items:center}
.navlink{color:var(--muted);text-decoration:none;padding:8px 10px;border-radius:12px;border:1px solid transparent}
.navlink:hover{border-color:var(--line);color:var(--text)}
.pill{padding:8px 10px;border:1px solid var(--line);border-radius:999px;background:rgba(17,24,39,.6);color:var(--muted);font-size:13px}
.container{max-width:980px;margin:0 auto;padding:18px}
.grid{display:grid;grid-template-columns:1.2fr .8fr;gap:14px}
@media (max-width:860px){.grid{grid-template-columns:1fr}}
.card{border:1px solid var(--line);background:rgba(17,24,39,.75);border-radius:18px;padding:16px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.h1{font-size:24px;margin:0 0 8px 0;font-weight:900}
.label{font-size:12px;color:var(--muted);margin:8px 0 6px}
.sep{height:1px;background:var(--line);margin:14px 0}
.small{font-size:12px;color:var(--muted)}
.row{display:flex;gap:12px;flex-wrap:wrap}
.btn{border:0;border-radius:12px;padding:10px 12px;background:var(--btn);color:white;font-weight:800;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--text)}
.input,select{width:100%;padding:10px;border-radius:12px;border:1px solid var(--line);background:rgba(11,15,20,.55);color:var(--text)}
.center{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 64px)}
.authbox{width:420px;max-width:92vw}
.kpi{flex:1;min-width:160px;border:1px solid var(--line);border-radius:16px;padding:12px;background:rgba(11,15,20,.35)}
.kpi .n{font-size:22px;font-weight:900}
.kpi .l{font-size:12px;color:var(--muted)}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;border:1px solid var(--line);background:rgba(11,15,20,.35);color:var(--muted);font-size:12px}
.quizprompt{font-size:28px;font-weight:950;margin:8px 0}
.result{padding:10px 12px;border-radius:12px;border:1px solid var(--line);background:rgba(11,15,20,.35)}
.result.good{border-color:rgba(34,197,94,.45)}
.result.bad{border-color:rgba(239,68,68,.45)}