*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

body{
  font-family:Arial, sans-serif;
  background:#f3f5f7;
  color:#1e293b;
}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

.topbar{
  background:white;
  border-bottom:1px solid #dbe2ea;
}

.nav{
  display:flex;
  justify-content:space-between;
  align-items:center;
  height:74px;
}

.logo{
  font-size:24px;
  font-weight:bold;
  color:#005baa;
}

nav a{
  text-decoration:none;
  color:#475569;
  margin-left:24px;
  font-size:15px;
}

nav a:hover{
  color:#005baa;
}

.hero{
  background:linear-gradient(to bottom,#ffffff,#edf3f9);
  padding:80px 0;
}

.hero-grid{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:40px;
  align-items:center;
}

.maintenance-badge{
  display:inline-block;
  background:#dbeafe;
  color:#005baa;
  padding:10px 16px;
  border-radius:8px;
  margin-bottom:24px;
  font-size:14px;
}

.hero h1{
  font-size:54px;
  line-height:1.1;
  margin-bottom:24px;
  color:#0f172a;
}

.hero p{
  font-size:18px;
  line-height:1.7;
  color:#475569;
}

.hero-buttons{
  margin-top:36px;
  display:flex;
  gap:16px;
}

.btn{
  padding:14px 22px;
  border-radius:8px;
  text-decoration:none;
  font-weight:bold;
}

.primary{
  background:#005baa;
  color:white;
}

.secondary{
  border:1px solid #cbd5e1;
  color:#334155;
  background:white;
}

.router-card{
  background:white;
  border-radius:14px;
  border:1px solid #dbe2ea;
  overflow:hidden;
  box-shadow:0 8px 20px rgba(0,0,0,0.06);
}

.router-header{
  background:#005baa;
  color:white;
  padding:16px 20px;
  font-weight:bold;
}

.terminal{
  background:#0f172a;
  color:#4ade80;
  font-family:Consolas, monospace;
  padding:24px;
  min-height:280px;
  line-height:1.8;
}

.products,
.calculator-section,
.status-section,
.about{
  padding:90px 0;
}

h2{
  font-size:38px;
  margin-bottom:36px;
  color:#0f172a;
}

.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:24px;
}

.card{
  background:white;
  border:1px solid #dbe2ea;
  border-radius:14px;
  padding:28px;
}

.card-icon{
  width:48px;
  height:48px;
  background:#005baa;
  color:white;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:bold;
  margin-bottom:20px;
}

.card h3{
  margin-bottom:14px;
}

.card p{
  color:#475569;
  line-height:1.7;
}

.calculator{
  background:white;
  border:1px solid #dbe2ea;
  border-radius:14px;
  padding:32px;
}

.calc-row{
  margin-bottom:28px;
}

.calc-row label{
  display:block;
  margin-bottom:10px;
}

.calc-row input{
  width:100%;
}

.calc-row span{
  display:block;
  margin-top:10px;
  color:#005baa;
  font-weight:bold;
}

.result-box{
  margin-top:32px;
  background:#edf3f9;
  border-radius:12px;
  padding:24px;
}

.result{
  margin-top:10px;
  font-size:34px;
  color:#005baa;
  font-weight:bold;
}

.status-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:20px;
}

.status-card{
  background:white;
  border:1px solid #dbe2ea;
  border-radius:12px;
  padding:22px;
  display:flex;
  align-items:center;
  gap:12px;
}

.status-card span{
  width:12px;
  height:12px;
  border-radius:50%;
}

.online span{
  background:#22c55e;
}

.warning span{
  background:#f59e0b;
}

.about p{
  max-width:900px;
  line-height:1.8;
  color:#475569;
}

footer{
  background:white;
  border-top:1px solid #dbe2ea;
}

.footer{
  display:flex;
  justify-content:space-between;
  padding:26px 20px;
  color:#64748b;
}

@media(max-width:950px){
  .hero-grid{
    grid-template-columns:1fr;
  }

  .hero h1{
    font-size:40px;
  }

  .footer{
    flex-direction:column;
    gap:12px;
  }

  nav{
    display:none;
  }
}