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

html{
scroll-behavior:smooth;
}

body{
background:#0d1117;
color:#ffffff;
line-height:1.6;
}

.container{
width:90%;
max-width:1400px;
margin:auto;
}

.header{
position:fixed;
width:100%;
top:0;
z-index:999;
background:rgba(13,17,23,0.85);
backdrop-filter:blur(12px);
border-bottom:1px solid rgba(0,255,255,0.15);
}

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

.logo img{height:74px;
filter:
drop-shadow(0 0 8px rgba(255,255,255,0.2))
drop-shadow(0 0 18px rgba(0,255,255,0.08));
}

.menu{
display:flex;
gap:30px;
}

.menu a{
color:white;
text-decoration:none;
font-weight:600;
transition:0.3s;
}

.menu a:hover{
color:#00f7ff;
}

.lang-switch button{
background:#141a22;
border:1px solid #00f7ff;
color:white;
padding:8px 16px;
cursor:pointer;
margin-left:8px;
border-radius:8px;
}

.hero{min-height:100vh;
display:flex;
align-items:center;
justify-content:center;
text-align:center;
position:relative;
overflow:hidden;
background:
radial-gradient(circle at top right, rgba(0,255,255,0.12), transparent 30%),
radial-gradient(circle at bottom left, rgba(130,255,80,0.08), transparent 35%),
linear-gradient(135deg,#090c10 0%,#111827 45%,#05080c 100%);
}

.hero::before{content:"";
position:absolute;
width:140%;
height:140%;
background:
linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
background-size:40px 40px;
animation:gridMove 30s linear infinite;
opacity:0.4;
}

.hero h1{
font-size:64px;
margin-bottom:20px;
}

.hero p{
font-size:24px;
color:#d0d0d0;
margin-bottom:40px;
}

.main-btn{display:inline-block;
background:linear-gradient(135deg,#00f7ff,#7cff58);
color:black;
padding:18px 38px;
border-radius:14px;
text-decoration:none;
font-weight:700;
border:none;
cursor:pointer;
transition:0.3s;
box-shadow:0 0 25px rgba(0,247,255,0.25);
}

.main-btn:hover{transform:translateY(-3px);
box-shadow:0 0 40px rgba(0,247,255,0.4);
}

.services,
.calculator,
.contacts{
padding:120px 0;
}

.services h2,
.calculator h2,
.contacts h2{
text-align:center;
font-size:44px;
margin-bottom:60px;
}

.cards{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
gap:30px;
}

.card{background:rgba(20,26,34,0.72);
backdrop-filter:blur(14px);
padding:35px;
border-radius:24px;
border:1px solid rgba(0,255,255,0.08);
transition:all 0.35s ease;
box-shadow:0 10px 30px rgba(0,0,0,0.25);
}

.card:hover{transform:translateY(-10px);
border-color:#00f7ff;
box-shadow:
0 0 25px rgba(0,247,255,0.15),
0 20px 40px rgba(0,0,0,0.35);
}

.card h3{
margin-bottom:18px;
color:#00f7ff;
}

.subtitle{
text-align:center;
margin-bottom:40px;
color:#bdbdbd;
}

form{
max-width:900px;
margin:auto;
}

.grid{
display:grid;
grid-template-columns:1fr 1fr;
gap:20px;
}

input,
select,
textarea{
width:100%;
padding:18px;
margin-bottom:20px;
border:none;
border-radius:12px;
background:#141a22;
color:white;
}

textarea{
min-height:150px;
resize:vertical;
}

.checkboxes{
display:grid;
grid-template-columns:repeat(2,1fr);
gap:12px;
margin-bottom:25px;
}

.upload{
display:block;
margin-bottom:25px;
}

.contact-box{
background:#141a22;
padding:40px;
border-radius:20px;
max-width:700px;
margin:auto;
text-align:center;
}

.contact-box h3{
font-size:30px;
margin-bottom:20px;
color:#00f7ff;
}

.footer{
text-align:center;
padding:30px 0;
border-top:1px solid rgba(255,255,255,0.1);
}

@media(max-width:992px){
.menu{
display:none;
}

.hero h1{font-size:76px;
font-weight:800;
margin-bottom:24px;
letter-spacing:2px;
text-shadow:
0 0 15px rgba(255,255,255,0.1),
0 0 40px rgba(0,247,255,0.1);
}

.hero p{
font-size:18px;
}

.grid{
grid-template-columns:1fr;
}

.checkboxes{
grid-template-columns:1fr;
}

.services h2,
.calculator h2,
.contacts h2{
font-size:32px;
}
}

@keyframes gridMove{from{
transform:translate(0,0);
}
to{
transform:translate(40px,40px);
}
}

.hero-badge{display:inline-block;
margin-bottom:25px;
padding:12px 20px;
border-radius:999px;
border:1px solid rgba(0,247,255,0.15);
background:rgba(255,255,255,0.04);
font-size:14px;
letter-spacing:2px;
color:#cfefff;
backdrop-filter:blur(12px);
}