:root{--bg:#0b1220;--panel:#121a2a;--text:#e6eefc;--muted:#9fb2d6;--accent:#47a3ff}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--accent);text-decoration:none}.topbar{display:flex;gap:16px;align-items:center;justify-content:space-between;padding:12px 16px;background:#0d1628;border-bottom:1px solid #1f2b44}.container{padding:16px;display:grid;grid-gap:16px;gap:16px;grid-template-columns:1fr;max-width:1000px;margin:0 auto}.panel{background:var(--panel);border:1px solid #24314f;border-radius:16px;padding:16px}.panel h2{margin-top:0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:12px;gap:12px}button,input,select{background:#0f1730;color:var(--text);border:1px solid #2a3a60;border-radius:10px;padding:8px 10px}button{cursor:pointer}.muted{color:var(--muted);margin-top:8px}.centered{display:grid;place-items:center;min-height:100vh}.card{background:var(--panel);padding:24px;border-radius:16px;width:320px;border:1px solid #24314f}.error{background:#3b1b24;border:1px solid #6b2233;padding:8px;border-radius:8px;margin-bottom:8px}.nk-header{position:-webkit-sticky;position:sticky;top:0;z-index:50}.nk-topbar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;grid-gap:12px;gap:12px;padding:10px 16px;background:#0d1628;border-bottom:1px solid #1f2b44}.nk-brand{display:flex;align-items:center}.nk-logo{align-items:baseline;gap:8px;font-weight:700;letter-spacing:.2px}.nk-logo-block{display:inline-flex;align-items:center;gap:8px}.nk-logo-dot{width:10px;height:10px}.nk-logo-text{font-size:18px;color:#e6eefc}.nk-nav{display:flex;gap:8px;justify-content:center}.nk-link{padding:8px 12px;border-radius:999px;color:#cfe0ff;border:1px solid transparent;transition:all .15s ease}.nk-link:hover{color:#fff;background:rgba(71,163,255,.08);border-color:rgba(71,163,255,.18)}.nk-link.active{color:#fff;background:rgba(71,163,255,.2);border-color:rgba(71,163,255,.35)}.nk-actions{display:flex;gap:8px;justify-content:end;align-items:center}.nk-btn{padding:8px 12px}.nk-container{padding:16px;max-width:1100px;margin:0 auto}.nk-footer{padding:20px 16px;margin-top:24px}.nk-footer-inner{max-width:1100px;margin:0 auto;display:flex;justify-content:center}.nk-burger{display:none}@media (max-width:900px){.nk-topbar{grid-template-columns:auto 1fr auto}.nk-nav{position:fixed;top:54px;left:0;right:0;background:#0d1628;border-bottom:1px solid #1f2b44;padding:10px 16px;gap:8px;display:none}.nk-nav.open{display:flex}.nk-burger{display:inline-flex;align-items:center;justify-content:center}}.nk-accent{height:3px;background:linear-gradient(90deg,#47a3ff,#6ee7ff,#47a3ff);opacity:.9}.nk-layout{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:calc(100vh - 3px)}.nk-sidebar{position:-webkit-sticky;position:sticky;top:3px;height:calc(100vh - 3px);background:#0d1628;border-right:1px solid #1f2b44;padding:16px 14px}.nk-side-inner{display:flex;flex-direction:column;height:100%;gap:14px}.nk-logo{display:inline-flex;align-items:center;gap:10px}.nk-logo-dot{width:11px;height:11px;border-radius:50%;background:#47a3ff;box-shadow:0 0 0 3px rgba(71,163,255,.25)}.nk-logo-texts{display:grid;line-height:1.05}.nk-logo-word{color:#e6eefc;font-weight:800;letter-spacing:.2px}.nk-logo-sub{color:#9fb2d6;font-size:12px;text-transform:uppercase;letter-spacing:1px}.nk-side-nav{display:grid;grid-gap:6px;gap:6px;margin-top:8px}.nk-navlink{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;color:#cfe0ff;border:1px solid transparent;transition:all .15s ease}.nk-navlink:hover{color:#fff;background:rgba(71,163,255,.08);border-color:rgba(71,163,255,.18)}.nk-navlink.active{color:#fff;background:rgba(71,163,255,.2);border-color:rgba(71,163,255,.35)}.nk-btn{padding:9px 12px;border-radius:10px;border:1px solid #2a3a60;background:#0f1730;color:#e6eefc}.nk-btn:hover{background:#132043}.nk-btn-ghost{background:transparent;border-color:#2a3a60}.nk-btn-ghost:hover{background:rgba(71,163,255,.1)}.nk-grow{flex:1 1 auto}.nk-main{min-width:0;display:grid;grid-template-rows:1fr auto}.nk-main-inner{padding:20px;max-width:1200px;width:100%;margin:0 auto}.nk-footer{padding:18px 20px;border-top:1px solid #1f2b44;background:#0d1628}.nk-burger{position:relative;width:38px;height:34px;display:inline-flex;border:1px solid #223257;border-radius:10px;background:#0f1730;align-items:center;justify-content:center}.nk-burger span{position:absolute;left:8px;right:8px;height:2px;background:#e6eefc;transition:.2s}.nk-burger span:first-child{top:10px}.nk-burger span:nth-child(2){top:16px}.nk-burger span:nth-child(3){top:22px}.nk-burger.open span:first-child{transform:translateY(6px) rotate(45deg)}.nk-burger.open span:nth-child(2){opacity:0}.nk-burger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}.nk-burger-fixed{display:none;position:fixed;top:10px;left:12px;z-index:60}@media (max-width:1000px){.nk-layout{grid-template-columns:0 1fr}.nk-sidebar{position:fixed;z-index:55;left:0;top:3px;bottom:0;width:250px;transform:translateX(-260px);transition:transform .2s ease}.nk-sidebar.open{transform:translateX(0)}.nk-burger-fixed{display:inline-flex}.nk-main-inner{padding:20px 14px}}.addtest-shell{display:grid;grid-template-columns:320px minmax(0,1fr);grid-gap:16px;gap:16px}.addtest-sidebar{background:var(--panel);border:1px solid #24314f;border-radius:16px;padding:14px;position:-webkit-sticky;position:sticky;top:16px;align-self:start}.addtest-form{display:grid;grid-gap:12px;gap:12px}.nk-field{display:grid;grid-gap:6px;gap:6px}.nk-label{font-size:12px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted)}.blend-row{display:grid;grid-template-columns:90px 1fr;align-items:center;grid-gap:10px;gap:10px}.blend-row input[type=range]{accent-color:#47a3ff}.addtest-preview{min-width:0}.nk-statgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:12px;gap:12px}.nk-stat{background:#0f1730;border:1px solid #223257;border-radius:14px;padding:12px}.nk-stat-label{color:var(--muted);font-size:12px;margin-bottom:6px}.nk-stat-value{font-size:20px;font-weight:700;color:#e6eefc}.nk-summary{display:grid;grid-gap:6px;gap:6px}@media (max-width:900px){.addtest-shell{grid-template-columns:1fr}.addtest-sidebar{position:static}}.login-shell{display:flex;justify-content:center;align-items:center;min-height:90vh}.login-form{background:#0d1628;padding:30px;border-radius:16px;border:1px solid #1f2b44;display:grid;grid-gap:12px;gap:12px;width:300px;text-align:center}.login-form h2{margin:0 0 8px;color:#e6eefc}.login-form input{padding:10px 12px;border-radius:8px;border:1px solid #24314f;background:#0f1730;color:#e6eefc}