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

body{
    font-family:'Poppins',sans-serif;
    color:#333;
    line-height:1.6;
}

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

header{
    background:#0d1117;
    color:white;
    position:sticky;
    top:0;
    z-index:1000;
}

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

.logo{
    font-size:1.4rem;
    font-weight:700;
}

nav ul{
    display:flex;
    list-style:none;
}

nav li{
    margin-left:25px;
}

nav a{
    color:white;
    text-decoration:none;
}

.hero{
    height:90vh;
    display:flex;
    justify-content:center;
    align-items:center;
    text-align:center;
    background:
    linear-gradient(
        rgba(0,0,0,.7),
        rgba(0,0,0,.7)
    ),
    url('https://images.unsplash.com/photo-1515879218367-8466d910aaa4')
    center/cover;
}

.hero-content{
    color:white;
    max-width:800px;
}

.hero h1{
    font-size:3rem;
    margin-bottom:20px;
}

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

.btn-primary{
    background:#0078ff;
    color:white;
    text-decoration:none;
    padding:15px 30px;
    border-radius:5px;
}

.section{
    padding:80px 0;
}

.section h2{
    text-align:center;
    margin-bottom:50px;
}

.cards{
    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 20px rgba(0,0,0,.1);
}

.dark{
    background:#0d1117;
    color:white;
}

.skills{
    display:flex;
    flex-wrap:wrap;
    gap:15px;
    justify-content:center;
}

.skills span{
    background:#0078ff;
    padding:10px 20px;
    border-radius:20px;
}

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

.timeline li{
    margin-bottom:20px;
}

.contact{
    background:#f5f5f5;
}

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

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

button{
    background:#0078ff;
    color:white;
    border:none;
    padding:15px 30px;
    cursor:pointer;
    border-radius:5px;
}

footer{
    background:#0d1117;
    color:white;
    text-align:center;
    padding:25px;
}