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

body{
    background:#111827;
    color:white;
    transition:.3s;
}

body.light{
    background:#f5f5f5;
    color:#111;
}

nav{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:20px 60px;
    background:#1f2937;
}

body.light nav{
    background:#ffffff;
}

.nav-links{
    display:flex;
    gap:20px;
}

.nav-links a{
    color:inherit;
    text-decoration:none;
}

.hero{
    height:85vh;
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    gap:20px;
    text-align:center;
}

.hero h1{
    font-size:60px;
}

.hero p{
    max-width:500px;
    color:#bdbdbd;
}

body.light .hero p{
    color:#555;
}

button{
    padding:12px 24px;
    border:none;
    border-radius:8px;
    background:#2563eb;
    color:white;
    cursor:pointer;
    font-size:16px;
    transition:.2s;
}

button:hover{
    transform:translateY(-2px);
    background:#1d4ed8;
}

.counter{
    margin-top:30px;
    padding:25px;
    border-radius:15px;
    background:rgba(255,255,255,.08);
    min-width:250px;
}

body.light .counter{
    background:#e9e9e9;
}

#count{
    display:block;
    font-size:50px;
    margin:20px 0;
}