*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#0a0a0f;--surface:#12121a;--border:#1e1e2e;--text:#e4e4e7;--muted:#71717a;--accent:#ff2d55;--green:#22c55e;--orange:#f59e0b;--red:#ef4444;--blue:#3b82f6}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
code{font-family:'JetBrains Mono',monospace;font-size:.85em;background:rgba(255,255,255,.08);padding:.15em .4em;border-radius:4px}

.nav{display:flex;align-items:center;justify-content:space-between;padding:1rem 2rem;border-bottom:1px solid var(--border);position:sticky;top:0;background:rgba(10,10,15,.95);backdrop-filter:blur(12px);z-index:100}
.nav-brand{font-weight:800;font-size:1.2rem;text-decoration:none;color:var(--text)}
.accent{color:var(--accent)}
.nav-links{display:flex;gap:1.5rem}
.nav-links a{color:var(--muted);text-decoration:none;font-size:.9rem;font-weight:500;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--accent)}

.hero{text-align:center;padding:4rem 2rem 3rem;max-width:700px;margin:0 auto}
.badge{display:inline-block;background:rgba(255,45,85,.15);color:var(--accent);padding:.35rem 1rem;border-radius:20px;font-size:.8rem;font-weight:600;margin-bottom:1.5rem;border:1px solid rgba(255,45,85,.3)}
.hero h1{font-size:2.8rem;font-weight:800;margin-bottom:.75rem;letter-spacing:-.02em}
.tagline{font-size:1.25rem;color:var(--accent);font-weight:600;margin-bottom:1rem}
.desc{color:var(--muted);font-size:1rem;margin-bottom:2rem}
.ctas{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}
.btn{padding:.75rem 1.75rem;border-radius:8px;font-weight:600;font-size:.95rem;text-decoration:none;transition:all .2s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#e0264b;transform:translateY(-1px)}
.btn-secondary{border:1px solid var(--border);color:var(--text);background:transparent}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}

.section-title{text-align:center;font-size:1.6rem;font-weight:700;margin-bottom:2rem;padding-top:3rem}

.dashboard{max-width:1100px;margin:0 auto;padding:0 2rem 3rem}
.dashboard-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1.25rem}
.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem}
.card-header{font-weight:700;font-size:.95rem;margin-bottom:1rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:.8rem}

.score-card{grid-column:1/4;text-align:center}
.score{font-size:5rem;font-weight:800;font-family:'JetBrains Mono',monospace}
.grade-a{color:var(--green)}.grade-b{color:var(--blue)}.grade-c{color:var(--orange)}.grade-d,.grade-f{color:var(--red)}
.score-label{color:var(--muted);margin-bottom:1rem}
.score-bar{height:8px;background:var(--border);border-radius:4px;overflow:hidden;max-width:400px;margin:0 auto .5rem}
.score-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--blue));border-radius:4px}
.score-pct{font-family:'JetBrains Mono',monospace;color:var(--muted);font-size:.85rem}

.stat-card{text-align:center}
.stat-icon{font-size:2rem;margin-bottom:.5rem}
.stat-icon.red{color:var(--red)}.stat-icon.orange{color:var(--orange)}.stat-icon.green{color:var(--green)}
.stat-num{font-size:2.5rem;font-weight:800;font-family:'JetBrains Mono',monospace}
.stat-label{color:var(--muted);font-size:.85rem;margin-top:.25rem}

.topology-card{grid-column:1/4}
.topology{display:flex;flex-direction:column;gap:1.5rem;align-items:center;padding:1rem 0}
.topo-row{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;justify-content:center}
.topo-node{background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:10px;padding:1rem 1.5rem;text-align:center;min-width:120px;transition:border-color .2s}
.topo-node.status-ok{border-color:rgba(34,197,94,.4)}
.topo-node.status-warn{border-color:rgba(245,158,11,.4)}
.topo-node.status-crit{border-color:rgba(239,68,68,.6);box-shadow:0 0 20px rgba(239,68,68,.1)}
.node-icon{font-size:1.5rem;margin-bottom:.25rem}
.node-label{font-weight:600;font-size:.85rem}
.node-status{font-size:.7rem;font-family:'JetBrains Mono',monospace;margin-top:.25rem;padding:.15rem .5rem;border-radius:4px}
.node-status.ok{color:var(--green);background:rgba(34,197,94,.1)}
.node-status.warn{color:var(--orange);background:rgba(245,158,11,.1)}
.node-status.crit{color:var(--red);background:rgba(239,68,68,.1)}
.topo-arrow{font-size:1.5rem;color:var(--muted);font-family:'JetBrains Mono',monospace}

.alerts-card{grid-column:1/4}
.alerts{list-style:none}
.alert{display:flex;align-items:center;gap:1rem;padding:.75rem 0;border-bottom:1px solid var(--border)}
.alert:last-child{border-bottom:none}
.alert-sev{font-family:'JetBrains Mono',monospace;font-size:.7rem;font-weight:700;padding:.2rem .6rem;border-radius:4px;min-width:70px;text-align:center}
.alert.critical .alert-sev{background:rgba(239,68,68,.15);color:var(--red)}
.alert.high .alert-sev{background:rgba(245,158,11,.15);color:var(--orange)}
.alert.medium .alert-sev{background:rgba(59,130,246,.15);color:var(--blue)}
.alert.low .alert-sev{background:rgba(113,113,122,.15);color:var(--muted)}
.alert-msg{flex:1;font-size:.9rem}
.alert-time{color:var(--muted);font-size:.8rem;font-family:'JetBrains Mono',monospace}

.features{max-width:1100px;margin:0 auto;padding:0 2rem 4rem}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem}
.feature{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem;text-align:center;transition:border-color .2s}
.feature:hover{border-color:var(--accent)}
.feat-icon{font-size:2rem;display:block;margin-bottom:.75rem}
.feature h3{font-size:.95rem;margin-bottom:.4rem}
.feature p{color:var(--muted);font-size:.8rem}

.footer{text-align:center;padding:2rem;border-top:1px solid var(--border);color:var(--muted);font-size:.85rem}

@media(max-width:768px){
  .hero h1{font-size:2rem}
  .dashboard-grid{grid-template-columns:1fr}
  .score-card,.topology-card,.alerts-card{grid-column:auto}
  .features-grid{grid-template-columns:1fr 1fr}
  .nav{padding:1rem}
  .nav-links{gap:.75rem}
  .alert{flex-wrap:wrap;gap:.5rem}
}
@media(max-width:480px){
  .features-grid{grid-template-columns:1fr}
  .topo-row{flex-direction:column}
  .topo-arrow{transform:rotate(90deg)}
}