:root{
      --bg:#f6f8fb; 
      --card:#ffffff; 
      --accent:#0b67a3; 
      --muted:#02153b; 
      --accent-2:#0ea5a4;
      --radius:12px; 
      --maxw:1200px;
      --shadow: 0 6px 18px rgba(11,103,163,0.08);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    }
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    margin:0;
    background:linear-gradient(180deg,var(--bg),#023570);
    color:#0f1724;
    max-width: var(--maxw);
    margin-left: auto; 
    margin-right: auto;
}

.container {
    width: 80%;
    max-width:var(--maxw);
    margin:0 auto;
    padding:28px
}


/* HEADER */
.header {
    width: 100%;
    padding:18px 0;
    position:sticky;
    top:0;
    height: 100px;
    backdrop-filter:saturate(120%) blur(6px);
    z-index:40;
    height: fit-content;
    padding: auto;
}

.nav {
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items:right;
    gap:16px
}

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

.reslogo{
    width: 160px;
    height: auto;
}
.brand{
    width: 40%;
    display:flex;
    align-items:center
}
.menu{
    display: flex;
    align-items: center;
}

.menu a {
    color: #0a46b8;
    margin-left: 20px;
    text-decoration: none;
    font-size: 18px;
    text-align: center;
}

.menu a:hover {
    color: #2116b9
}
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: #0a46b8;
    margin: 4px 0;
    transition: 0.3s;
}

@media (max-width: 768px) {

    .menu-toggle {
        display: flex;
    }

    .menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: linear-gradient(180deg, var(--bg), #6f8fb4);
        flex-direction: column;
        align-items: center;
        display: none;
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    }

    .menu a {
        margin: 15px 0;
        font-size: 18px;
    }

    .menu.active {
        display: flex;
    }
}

.backimg{
    color: #ffffff;
    max-width: var(--maxw);
    margin: auto;
}
.hvacimg{
    background: linear-gradient(rgba(15,42,68,0.7), rgba(15,42,68,0.7)),url('images/hvac.jfif');
    padding: 100px 20px;
    background-size: cover;
    background-position: center;
    border-radius: 15px;
}
.electricimg{
    background: linear-gradient(rgba(15,42,68,0.7), rgba(15,42,68,0.7)),url('images/electric.jpg');
    padding: 100px 20px;
    background-size: cover;
    background-position: center;  
    border-radius: 15px;  
}
.plumbingimg{
    background: linear-gradient(rgba(15,42,68,0.7), rgba(15,42,68,0.7)),url('images/plumbing.jfif');
    padding: 100px 20px;
    background-size: cover;
    background-position: center;
    border-radius: 15px;
}
.fireimg{
    background: linear-gradient(rgba(15,42,68,0.7), rgba(15,42,68,0.7)),url('images/fire.webp');
    padding: 100px 20px;
    background-size: cover;
    background-position: center;
    border-radius: 15px;
}

.mechimg{
    background: linear-gradient(rgba(15,42,68,0.7), rgba(15,42,68,0.7)),url('images/mech.jfif');
    padding: 100px 20px;
    background-size: cover;
    background-position: center;
    border-radius: 15px;
}

.maintimg{
    background: linear-gradient(rgba(15,42,68,0.7), rgba(15,42,68,0.7)),url('images/maintimg.jfif');
    padding: 100px 20px;
    background-size: cover;
    background-position: center;
    border-radius: 15px;
}

.btn-group {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.btn-primary {
    background: linear-gradient(180deg, var(--bg), #6f8fb4);
    padding: 12px 28px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
}

.btn-secondary {
    background: linear-gradient(180deg, var(--bg), #6f8fb4);
    padding: 12px 28px;
    text-decoration: none;
    border: 2px solid #0f2a44;
    border-radius: 6px;
    font-weight: 600;
}


    .install {
        max-width: var(--maxw);
        margin: auto;
        padding: 40px 20px;
        }
    h1, h2, h3 {
            color: #0f2a44;
        }
    h1 {
            font-size: 32px;
            margin-bottom: 10px;
        }
    h2 {
            font-size: 26px;
            margin-top: 20px;
            border-left: 4px solid #0f2a44;
            padding-left: 12px;
        }
    h3 {
            font-size: 20px;
            margin-top: 15px;
        }
    p {
            margin: 12px 0;
        }
    ul {
            margin: 12px 0 12px 20px;
        }
    ul li {
            margin-bottom: 8px;
        }
    .highlight {
            background: linear-gradient(180deg, var(--bg), #6f8fb4);
            padding: 25px;
            border-radius: 6px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.06);
            margin-top: 30px;
        }
    .two-column {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
    .footer-note {
            margin-top: 40px;
            padding: 20px;
            background: #0f2a44;
            color: #ffffff;
            border-radius: 6px;
        }
       


footer{
    background:#0b2222;
    color:#cfeef7;
    padding:40px;
    border-radius:16px;
    margin-top:40px;
}

.footer-grid{
    display:grid;
    grid-template-columns:1fr 220px;
    gap:20px;
}

.social{
    margin-top:16px;
}

.social a img{
    width:40px;
    height:40px;
}

/* Mobile & Tablet Optimization */
@media (max-width: 768px) {
    .footer-grid{
        grid-template-columns: 1fr;
    }

    footer{
        padding:24px;
    }

    .social{
        display:flex;
        justify-content:center;
        gap:10px;
    }
}
.muted-small{
    font-size:13px;
    color:var(--muted)
}