* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Hind Siliguri', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f7f6;
}

/* Navbar */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 10%;
    background: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
}

.logo span { color: #e67e22; }

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li { margin-left: 20px; }

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: 0.3s;
}

.nav-links a:hover { color: #e67e22; }

/* Hero Section with Online Image */
.hero {
    height: 70vh;
    /* এখানে অনলাইন থেকে টেকনিশিয়ানের ছবি লোড হবে */
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), 
                url('https://images.unsplash.com/photo-1621905251189-08b45d6a269e?q=80&w=2069&auto=format&fit=crop') no-repeat center center/cover;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #fff;
    text-align: center;
    padding: 0 20px;
}

.hero h1 { font-size: 3rem; margin-bottom: 15px; text-shadow: 2px 2px 4px rgba(0,0,0,0.5); }
.hero p { font-size: 1.2rem; margin-bottom: 25px; }

.btn {
    padding: 15px 35px;
    background: #e67e22;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: 0.3s;
}

.btn:hover { background: #d35400; transform: scale(1.05); }

/* Services */
.services { padding: 80px 10%; text-align: center; }
.services h2 { font-size: 2.5rem; margin-bottom: 40px; color: #2c3e50; }

.service-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.service-card {
    background: #fff;
    padding: 40px 20px;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    transition: 0.3s;
    border-bottom: 4px solid transparent;
}

.service-card:hover { 
    transform: translateY(-10px); 
    border-bottom: 4px solid #e67e22;
}

.service-card i {
    font-size: 50px;
    color: #e67e22;
    margin-bottom: 20px;
}

.service-card h3 { margin-bottom: 15px; color: #2c3e50; }

/* Footer */
footer {
    background: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 30px;
    margin-top: 60px;
    }