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

body{
    line-height:1.6;
    color:#222;
}

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

header{
    background:#fff;
    box-shadow:0 2px 10px rgba(0,0,0,.08);
    position:sticky;
    top:0;
    z-index:1000;
}

header .container{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:20px 0;
}

.logo{
    display:flex;
    align-items:center;
    gap:15px;
}

.logo h1{
    color:#000;
    font-size:1.8rem;
}

.roof-icon{
    position:relative;
    width:70px;
    height:40px;
}

.roof-blue{
    position:absolute;
    width:60px;
    height:6px;
    background:#0000cc;
    transform:rotate(-35deg);
    top:18px;
    left:0;
}

.roof-black{
    position:absolute;
    width:50px;
    height:6px;
    background:#111;
    transform:rotate(-35deg);
    top:8px;
    right:0;
}

nav a{
    text-decoration:none;
    color:#333;
    margin-left:25px;
    font-weight:600;
}

nav a:hover{
    color:#0000cc;
}

.hero{
    height:85vh;
    background:
    linear-gradient(rgba(0,0,0,.55),
    rgba(0,0,0,.55)),
    url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?auto=format&fit=crop&w=1600&q=80');
    background-size:cover;
    background-position:center;
    display:flex;
    align-items:center;
    justify-content:center;
    text-align:center;
    color:white;
}

.hero h2{
    font-size:3.5rem;
    margin-bottom:20px;
}

.hero p{
    font-size:1.2rem;
    margin-bottom:30px;
}

.btn{
    display:inline-block;
    background:#0000cc;
    color:white;
    text-decoration:none;
    padding:15px 35px;
    border-radius:5px;
    font-weight:bold;
    transition:.3s;
}

.btn:hover{
    background:#000099;
}

.services{
    padding:80px 0;
}

.services h2,
.about h2,
.contact h2{
    text-align:center;
    margin-bottom:40px;
    font-size:2.2rem;
}

.service-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
    gap:25px;
}

.card{
    background:white;
    padding:30px;
    border-radius:10px;
    box-shadow:0 5px 15px rgba(0,0,0,.08);
    border-top:4px solid #0000cc;
}

.about{
    background:#f5f7fa;
    padding:80px 0;
    text-align:center;
}

.about p{
    max-width:800px;
    margin:auto;
}

.contact{
    padding:80px 0;
}

form{
    max-width:700px;
    margin:auto;
}

input,
textarea{
    width:100%;
    padding:15px;
    margin-bottom:15px;
    border:1px solid #ddd;
    border-radius:5px;
}

textarea{
    height:150px;
    resize:none;
}

button{
    background:#0000cc;
    color:white;
    border:none;
    padding:15px 30px;
    border-radius:5px;
    cursor:pointer;
    font-weight:bold;
}

button:hover{
    background:#000099;
}

footer{
    background:#111;
    color:white;
    text-align:center;
    padding:25px;
}

@media(max-width:768px){

    header .container{
        flex-direction:column;
        gap:15px;
    }

    nav a{
        margin:0 10px;
    }

    .hero h2{
        font-size:2.3rem;
    }
}