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

/* Body */
body{
    background:#f4f4f4;
    color:#333;
    line-height:1.6;
}

/* Header */
header{
    background:#0d6efd;
    color:#fff;
    padding:20px;
    text-align:center;
}

header h1{
    margin-bottom:10px;
}

nav ul{
    list-style:none;
}

nav ul li{
    display:inline-block;
    margin:10px;
}

nav ul li a{
    color:white;
    text-decoration:none;
    font-weight:bold;
}

nav ul li a:hover{
    color:yellow;
}

/* Sections */
section{
    padding:50px;
    text-align:center;
}

/* Home */
#home{
    background:#ffffff;
}

.btn{
    display:inline-block;
    margin-top:20px;
    padding:12px 25px;
    background:#0d6efd;
    color:white;
    text-decoration:none;
    border-radius:5px;
}

.btn:hover{
    background:#084298;
}

/* About */
#about img{
    width:200px;
    height:200px;
    border-radius:50%;
    border:4px solid #0d6efd;
    margin:20px 0;
}

#about ul{
    list-style:none;
}

/* Skills */
#skills{
    background:#eef5ff;
}

#skills ul{
    list-style:none;
}

#skills li{
    display:inline-block;
    margin:10px;
    padding:10px 20px;
    background:#0d6efd;
    color:white;
    border-radius:20px;
}

/* Projects */
#projects{
    background:white;
}

.project{
    background:#fff;
    margin:30px auto;
    padding:20px;
    width:80%;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,0.2);
}

.project img{
    width:100%;
    max-width:400px;
    border-radius:10px;
}

.project h3{
    margin:15px 0;
}

/* Certificates */
#certificates{
    background:#eef5ff;
}

#certificates ul{
    list-style:none;
}

#certificates li{
    margin:10px;
    font-size:18px;
}

/* Contact */
#contact{
    background:white;
}

#contact p{
    margin:10px;
    font-size:18px;
}

/* Footer */
footer{
    background:#0d6efd;
    color:white;
    text-align:center;
    padding:20px;
}

/* Responsive */
@media(max-width:768px){

nav ul li{
    display:block;
    margin:10px 0;
}

section{
    padding:25px;
}

.project{
    width:95%;
}

#about img{
    width:150px;
    height:150px;
}

}