:root{
  --primary:#0f766e;
  --accent:#22c55e;
  --dark:#0b1320;
  --light:#f5f7fb;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:Segoe UI, Arial, sans-serif;
  color:#1a1a1a;
  line-height:1.6;
  background:white;
}

.container{
  width:90%;
  max-width:1200px;
  margin:auto;
}

header{
  background:white;
  border-bottom:1px solid #eee;
  position:sticky;
  top:0;
  z-index:10;
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 0;
}

.logo{
  font-size:24px;
  font-weight:700;
  color:var(--primary);
}

nav a{
  margin-left:22px;
  text-decoration:none;
  color:#333;
  font-weight:500;
}

nav a.lang{
  border:1px solid var(--primary);
  padding:6px 10px;
  border-radius:5px;
}

.hero{
  padding:120px 0;
  background:linear-gradient(120deg,#0b1320,#0f766e);
  color:white;
  text-align:center;
}

.hero h1{
  font-size:42px;
  margin-bottom:20px;
}

.hero p{
  font-size:20px;
  max-width:700px;
  margin:auto;
}

.btn{
  display:inline-block;
  margin-top:30px;
  background:var(--accent);
  color:white;
  padding:14px 28px;
  border-radius:6px;
  text-decoration:none;
  font-weight:600;
}

.section{
  padding:90px 0;
}

.section.dark{
  background:var(--dark);
  color:white;
}

.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:30px;
  margin-top:40px;
}

.card{
  padding:28px;
  border-radius:8px;
  border:1px solid #eee;
  background:white;
}

.dark .card{
  background:#111a2b;
  border:1px solid #222;
}

h2{
  font-size:32px;
}

footer{
  background:#0b1320;
  color:white;
  padding:40px 0;
  text-align:center;
}

form{
  max-width:500px;
}

input, textarea{
  width:100%;
  padding:12px;
  margin-bottom:14px;
  border:1px solid #ccc;
  border-radius:5px;
}

button{
  background:var(--primary);
  color:white;
  border:none;
  padding:14px;
  width:100%;
  border-radius:6px;
  font-size:16px;
}