:root{
  --text:#eef4ff;--muted:#9fb0cb;--line:#26334d;--accent:#53a3ff;--good:#2fd28c;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:radial-gradient(circle at top,#122038 0%,#090c13 48%,#07090e 100%);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif}
body{min-height:100vh}
.shell{display:grid;grid-template-columns:270px 1fr;min-height:100vh}
.sidebar{background:rgba(8,11,18,.86);backdrop-filter:blur(10px);border-right:1px solid var(--line);padding:24px;display:flex;flex-direction:column;gap:24px}
.brand{display:flex;gap:14px;align-items:center}
.brand-mark{width:54px;height:54px;border-radius:16px;background:linear-gradient(135deg,var(--accent),#7857ff);display:grid;place-items:center;font-weight:800;letter-spacing:.08em}
.brand-title{font-size:1.2rem;font-weight:700}
.brand-sub{color:var(--muted);font-size:.95rem}
.nav{display:grid;gap:10px}
.nav-btn{background:transparent;color:var(--text);border:1px solid var(--line);padding:14px 16px;border-radius:14px;text-align:left;cursor:pointer;transition:.16s}
.nav-btn:hover,.nav-btn.active{background:linear-gradient(180deg,#1b2640,#131b2b);border-color:#44608f}
.sidebar-foot{margin-top:auto;padding-top:10px;border-top:1px solid var(--line)}
.tiny-label{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.mono{font-family:Consolas,monospace;word-break:break-all}
.main{padding:28px}
.hero{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:22px}
.hero h1{margin:0 0 8px;font-size:2rem}
.hero p{margin:0;color:var(--muted);max-width:700px}
.hero-pill{border:1px solid var(--line);background:rgba(19,25,38,.9);padding:10px 14px;border-radius:999px;color:var(--muted)}
.view{display:none}
.view.active{display:block}
.grid{display:grid;gap:18px}
.grid.two{grid-template-columns:1.1fr .9fr}
.card{background:linear-gradient(180deg,rgba(20,26,38,.96),rgba(14,18,28,.96));border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 10px 30px rgba(0,0,0,.18)}
.card-title{font-size:1.18rem;font-weight:700;margin-bottom:12px}
.card-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:10px}
.muted{color:var(--muted)}
.stack{display:grid;gap:12px}
input{background:#0d1320;border:1px solid #31405f;color:var(--text);padding:14px 16px;border-radius:14px;font-size:1.08rem}
button{font:inherit}
.primary,.ghost{padding:12px 16px;border-radius:14px;cursor:pointer}
.primary{background:linear-gradient(135deg,var(--accent),#7d5dff);border:none;color:white;font-weight:700}
.ghost{background:transparent;border:1px solid var(--line);color:var(--text)}
.result{margin-top:14px;min-height:24px}
.result.good{color:var(--good)}
.result.bad{color:#ff8d8d}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line)}
th{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.status-pill{display:inline-flex;align-items:center;padding:7px 10px;border-radius:999px;font-size:.86rem;font-weight:700}
.status-paired{background:rgba(47,210,140,.15);color:#70f1b5}
.status-pending{background:rgba(248,207,97,.14);color:#ffd773}
.status-unknown{background:rgba(159,176,203,.14);color:#d0def4}
.status-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.code-block{background:#0c111b;border:1px solid var(--line);padding:16px;border-radius:16px;overflow:auto;white-space:pre-wrap}
.empty{padding:20px;border:1px dashed var(--line);border-radius:16px;color:var(--muted)}
.default-preview{margin-top:18px;border:1px solid var(--line);background:#0c111b;padding:18px;border-radius:18px}
.preview-title{font-weight:700;margin-bottom:14px}
.preview-button{display:inline-flex;align-items:center;justify-content:center;min-width:240px;padding:18px 22px;border-radius:16px;background:linear-gradient(135deg,var(--accent),#7d5dff);font-weight:700}
@media (max-width: 980px){
  .shell{grid-template-columns:1fr}
  .sidebar{border-right:none;border-bottom:1px solid var(--line)}
  .grid.two,.status-grid{grid-template-columns:1fr}
  .hero{flex-direction:column}
}