:root{
    --background-color: #080808;
    --text-color: #fff;
    --accent-color: #0066ff;
    --muted-text-color: #ababab;
    --object-background: #262626;
    --darker-object-background: #1a1a1a;
    --accent-color-less-bright: #0051cc;
    
}
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}
html{
    scroll-behavior: smooth;
}
body{
    background: var(--background-color);
    color: var(--text-color);
}
#header{
    width: 100%;
    height: 100vh;
    /* show the image, but overlay a gradient so it fades into the page color from right -> left */
    background-image: linear-gradient(to left, rgba(8,8,8,0) 0%, rgba(8,8,8,1) 80%), url(images/bg.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}
.container{
    padding: 10px 10%;
}

nav{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 72px;
    z-index: 999;
    background: rgba(8,8,8,0.9);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}
main, .container { padding-top: 72px; }
#header .container { padding-top: calc(72px + 20vh); } /* if header needs extra top spacing */

.logo{
    width: 70px;
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}

/* Make nav list spacing dynamic: use flex gap instead of per-item margins */
nav ul{
    display: flex;
    align-items: center;
    gap: clamp(8px, 2.5vw, 28px); /* min 8px, fluid with viewport, max 28px */
    padding: 0 10%;
    margin: 0;
}

nav ul li{
    display: block; /* items are laid out by the flex container */
    list-style: none;
    margin: 0;
}

nav ul li a{
    color: var(--text-color);
    text-decoration: none;
    font-size: 18px;
    position:relative;
}

nav ul li a::after{
    content: '';
    width: 0;
    height: 3px;
    background: var(--accent-color);
    position: absolute;
    left: 0;
    bottom: -6px;
    transition: width 0.3s;
}

nav ul li a:hover::after{
    width: 100%;
}

.header-text{
    margin-top: 20%;
    font-size: 30px;
}

.header-text p{
    margin: 20px 0;
    font-size: 18px;
    color: var(--muted-text-color);
}

.header-text h1{
    font-size: 60px;
    margin-top: 20px;
    color: var(--text-color);
}

.header-text h1 span{
    color: var(--accent-color);
}

/* ----------about---------- */
#about{
    padding: 80px 0;
    color: var(--muted-text-color);
}
.row{
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.about-col-1{
    flex-basis: 35%;
}
.about-col-1 img{
    width: 100%;
    border-radius: 15px;
}
.about-col-2{
    flex-basis: 60%;
}

.sub-title{
    font-size: 60px;
    font-weight:600;
    color: var(--text-color);
}

.tab-titles{
    display: flex;
    margin: 20px 0 40px;
}
.tab-links{
    margin-right: 50px;
    font-size:18px;
    font-weight: 500;
    cursor: pointer;
    position: relative
}

.tab-links::after{
    content: '';
    width: 0;
    height: 3px;
    background: var(--accent-color);
    position: absolute;
    left: 0;
    bottom: -8px;
    transition: 0.5s;
}

.tab-links.active-link::after{
    width: 100%;
}

.tab-contents ul li{
    list-style: none;
    margin: 10px 0;
}
.tab-contents ul li span{
    color: var(--accent-color);
    font-size: 14px;
}
.tab-contents{
    display: none;
}
.tab-contents.active-tab{
    display: block;
}
/* ----------technical skills---------- */
#skills{
    padding: 30px 0;
}
.card-list{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    grid-gap: 40px;
    margin-top: 50px;
}
.skills-card{
    background: var(--object-background);
    padding: 30px;
    font-weight: 300;;
    border-radius: 10px;
    text-align: center;
    transition: background 0.3s, transform 0.3s;
}
.skills-card:hover{
    background: var(--accent-color);
    transform: translateY(-10px);
}

.skills-card ul{
    list-style: none;
}
.skills-list{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}
.skill{
    background: var(--darker-object-background);
    padding: 10px 20px;
    border-radius: 6px;
    transition: background 0.3s, transform 0.3s;
}
.skill:hover{
    background: var(--accent-color-less-bright);
}
.skill i{
    margin-right: 10px;
    font-size: 16px;
}
/* ----------portfolio---------- */
#portfolio{
    padding: 30px 0;
}
.card-list{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    grid-gap: 40px;
    margin-top: 50px;
}
.project-card{
    background: var(--object-background);
    padding: 30px;
    font-weight: 300;
    border-radius: 10px;
    text-align: center;
    transition: background 0.3s, transform 0.3s;
}
.project-card:hover{
    background: var(--accent-color);
    transform: translateY(-10px);
}
.project-card img{
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    width: 100%;
    display: block;
    transition: transform 0.5s;
}
.project-card h3{
    font-weight: 500;
    margin-bottom: 20px;
    margin-top: 15px;
}
.project-card p{
    color: var(--text-color);
}
.project-card a{
    position: relative;
    bottom: -20px;
    margin-top: 15px;
    color: var(--accent-color);
    text-decoration: none;
    font-size: 30px;
    line-height: 60px;
    background: var(--background-color);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    text-align: center;
    display: inline-block;
    transition: background 0.3s, transform 0.3s;
}
.project-card a:hover{
    background: var(--accent-color-less-bright);
    transform: translateY(-5px);
}
/* ----------contact---------- */
.contact-left{
    flex-basis: 35%;
}
.contact-right{
    flex-basis: 60%;
    padding-left: 30px;
}
.contact-left p{
    margin-top: 30px;
}
.contact-left p i{
    color: var(--accent-color);
    margin-right: 15px;
    font-size: 25px;
}
.social-icons{
    margin-top: 30px;
}
.social-icons a{
    text-decoration: none;
    font-size: 30px;
    margin-right: 15px;
    color: var(--muted-text-color);
    display:inline-block;
    transition: transform 0.5s, color 0.5s;
}
.social-icons a:hover{
    color: var(--accent-color);
    transform: translateY(-5px);
}
.btn{
    display: block;
    margin: 50px auto;
    width: fit-content;
    border: 1px solid var(--accent-color);
    padding: 14px 50px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-color);
    transition: background 0.5s;
}
.btn:hover{
    background: var(--accent-color);
} 
.btn.btn2{
    display: inline-block;
    background: var(--accent-color);
}
.contact-rigth form{
    width: 100%;
}
form input, form textarea{
    width: 100%;
    border: 0;
    outline: none;
    background: var(--object-background);
    padding: 15px;
    margin: 15px 0;
    color: var(--text-color);
    font-size: 18px;
    border-radius: 6px;
}
form .btn2{
    padding: 14px 60px;
    font-size: 18px;
    margin-top: 20px;
    cursor: pointer;
}
.copyright{
    width: 100%;
    text-align: center;
    padding: 25px 0;
    background: var(--object-background);
    font-weight: 300;
    margin-top: 20px;;
}
/* ---------------- css for small screens ---------------- */
nav .fa-solid{
    display: none;
}

@media only screen and (max-width: 600px){
    #header{
        background-image: linear-gradient(to left, rgba(8,8,8,0) 0%, rgba(8,8,8,1) 60%), url(images/phone_bg.png);
        background-attachment: scroll;
    }
    .header-text{
        margin-top: 100%;
        font-size: 16px;
    }
    .header-text h1{
        font-size: 30px;
    }
    nav{
        background: none;
        padding: 5%;
    }
    nav .fa-solid{
        display: block;
        font-size: 25px;
        cursor: pointer;
    }
    nav ul{
        display: block;
        background: var(--accent-color);
        position: fixed;
        top: 0;
        right: -200px;
        width: 200px;
        height: 100vh;
        padding-top: 50px;
        z-index: 2;
        transition: right 0.5s;
    }
    nav ul li{
        display: block;
        margin: 25px;
    }
    nav ul .fa-solid{
        position: absolute;
        top: 25px;
        left: 25px;
        cursor: pointer;
    }
    .sub-title{
        font-size: 40px;
    }
    .about-col-1, .about-col-2{
        flex-basis: 100%;
    }
    .about-col-1{
        margin-bottom: 30px;
    }
    .about-col-2{
        font-size: 14px;
    }
    .tab-links{
        margin-right: 20px;
        font-size: 16px;
    }
    .contact-left, .contact-right{
        flex-basis: 100%;
    }
    .copyright{
        font-size: 14px;
    }
}
#msg{
    color: #61b752;
    margin-top: -10px;
    display: block;
}