:root{
  --bg-light:#f4f6f8;
  --card-light:#ffffff;
  --txt-light:#1a1f23;
  --muted-light:#6c7a87;

  --bg-dark:#0e1116;
  --card-dark:#161b22;
  --txt-dark:#e6ebf0;
  --muted-dark:#9aa5b1;

  --accent:#6b85af;
  --accent-2:#839bc1;

  --radius:16px;
  --max-width:1250px;
}

html[data-theme="light"]{
  --bg:var(--bg-light);
  --card:var(--card-light);
  --txt:var(--txt-light);
  --muted:var(--muted-light);
}

html[data-theme="dark"]{
  --bg:var(--bg-dark);
  --card:var(--card-dark);
  --txt:var(--txt-dark);
  --muted:var(--muted-dark);
}

*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:Arial, Helvetica, sans-serif;
}

body{
  background:var(--bg);
  color:var(--txt);
  padding:5px;
  display:flex;
  justify-content:center;
}

.cookies{padding:5px 5px 5px;font-weight:700;text-align:center;background:linear-gradient(to bottom,#4f6fa3 0%,#89a3c9 50%,#4f6fa3 100%)}

.container{
  width:100%;
  max-width:var(--max-width);
}

header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  background:var(--card);
  padding:18px 14px;
  border-radius:var(--radius);
  box-shadow:0 4px 20px rgba(0,0,0,0.08);
}

.logo-title{
  font-size:20px;
  font-weight:800;
}

nav a{
  color:var(--txt);
  margin-left:16px;
  text-decoration:none;
  font-weight:600;
}

nav a:hover{
  color:var(--accent);
}

.header-controls{
  display: flex;
  align-items: center;
}

.lang-switch button,
.theme-switch button{
  background:none;
  border:1px solid var(--muted);
  color:var(--txt);
  padding:6px 10px;
  border-radius:10px;
  margin-left:6px;
  cursor:pointer;
  font-size:13px;
}

.lang-switch button:hover,
.theme-switch button:hover{
  border-color:var(--accent);
  color:var(--accent);
}

.hero{
  margin-top:45px;
  background:var(--card);
  padding:10px;
  border-radius:var(--radius);
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
  box-shadow:0 8px 30px rgba(0,0,0,0.08);
}

h1{
  font-size:36px;
  line-height:1.1;
}

p{
  color:var(--muted);
  margin-top:10px;
}

.btn{
  background:var(--accent);
  color:white;
  padding:10px 18px;
  border-radius:14px;
  font-weight:700;
  border:none;
  cursor:pointer;
}

.btn.secondary{
  background:transparent;
  color:var(--accent);
  border:1.5px solid var(--accent);
}

section{
  margin-top:40px;
  background:var(--card);
  padding:18px;
  border-radius:var(--radius);
  box-shadow:0 8px 24px rgba(0,0,0,0.06);
}

h2{
  margin-bottom:12px;
  font-size:28px;
}

.grid-3{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin-top:14px;
}

.item{
  background:rgba(255,255,255,0.04);
  padding:10px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,0.08);
}

.contact-form{
  display:grid;
  gap:15px;
}

.response-msg{
  margin-top:20px;
  font-weight:600;
}

footer{
  margin-top:40px;
  text-align:center;
  color:var(--muted);
}

footer a{
  color:var(--accent);
  text-decoration:none;
}

footer a:hover{
  text-decoration:underline;
}

@media(max-width:900px){
  .hero{
    grid-template-columns:1fr;
  }
  .grid-3{
    grid-template-columns:1fr;
  }
}