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

body{
    background:#f5f5f5;
    overflow-x:hidden;
}

/* ================= HERO ================= */

.hero{
    width:100%;
    height:85vh;
    position:relative;
    overflow:hidden;

    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:0 7%;
}

/* SLIDER LAYER */
.hero-slider{
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    z-index:0;
}

/* each slide */
.hero-slide{
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background-size:cover;
    background-position:center;

    opacity:0;
    transform:translateX(-100%);
    transition: all 1.5s cubic-bezier(0.77, 0, 0.175, 1);
}

/* active slide */
.hero-slide.active{
    opacity:1;
    transform:translateX(0);
    z-index:1;
}

/* previous slide (exit to right) */
.hero-slide.prev{
    opacity:0;
    transform:translateX(100%);
}

/* gradient overlay */
.hero::after{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(
        90deg,
        rgba(0,0,0,.92) 10%,
        rgba(0,0,0,.55) 50%,
        rgba(0,0,0,.1) 100%
    );
    z-index:2;
    pointer-events:none;
}

/* content stays above slides */
.hero-content,
.software-stack{
    position:relative;
    z-index:3;
}

.hero-content{
    max-width:100%;
    margin-top:0;
    margin-bottom:0;
    line-height: 1.7;
}

.hero h1{
    color:white;
    font-size:4.8rem;
    font-weight:800;
    line-height:1;
    margin-bottom:20px;
}

.hero p{
    color:#e6e6e6;
    font-size:1.1rem;
    line-height:1.8;
}

.social-links{
    display:flex;
    gap:15px;
    margin-top:50px;
}

.social-links img{
    width:40px;
    height:40px;
    object-fit:contain;
    transition:.6s;
}

.social-links img:hover{
    transform:translateY(-5px) scale(1.1);
}

.software-stack{
    display:flex;
    flex-direction:column;
    gap:18px;
}

.software-stack img{
    width:50px;
    height:50px;
    object-fit:contain;
    transition:.6s;
}

.software-stack img:hover{
    transform:translateX(-8px) scale(1.1);
}

/* ================= SECTION ================= */

.projects{
    padding:80px 7%;
}

.section-title{
    font-size:2.3rem;
    margin-bottom:40px;
    font-weight:700;
}

.portfolio-layout{
    display:grid;
    grid-template-columns:260px 1fr;
    gap:40px;
}

.tree-menu{
    display:flex;
    flex-direction:column;
    gap:15px;
}

.tree-menu button{
    background:white;
    border:none;
    padding:18px;
    border-radius:14px;
    cursor:pointer;
    font-weight:600;
    text-align:left;
    box-shadow:0 10px 25px rgba(0,0,0,.08);
    transition:.6s;
}

.tree-menu button:hover{
    background:#ff9900;
    color:white;
    transform:translateX(8px);
}

.project-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
    gap:25px;
}

.card{
    background:white;
    border-radius:18px;
    overflow:hidden;
    box-shadow:0 12px 30px rgba(0,0,0,.08);
    transition:.7s;
    animation:fadeUp .6s ease;
}

.card:hover{
    transform:translateY(-10px);
}

.thumbnail{
    position:relative;
}

.thumbnail img{
    width:100%;
    display:block;
}

.overlay{
    position:absolute;
    inset:0;
    background:linear-gradient(to top, rgba(0,0,0,.75), rgba(0,0,0,.1));
}

.video-title{
    position:absolute;
    bottom:15px;
    left:15px;
    color:white;
    font-size:1.2rem;
    font-weight:700;
}

.card-content{
    padding:20px;
}

.card-content p{
    color:#666;
    margin-bottom:15px;
    line-height:1.6;
}

.btn{
    display:inline-block;
    padding:10px 22px;
    background:#111;
    color:white;
    border-radius:30px;
    text-decoration:none;
    transition:.6s;
}

.btn:hover{
    background:#ff9900;
}

@keyframes fadeUp{
    from{opacity:0;transform:translateY(20px);}
    to{opacity:1;transform:translateY(0);}
}

/* ================= FOOTER ================= */

.footer{
    text-align:center;
    padding:40px;
    color:#777;
    background:white;
    margin-top:50px;
}

/* ================= RESPONSIVE DESIGN ================= */

@media(max-width:1200px){
    .hero h1{font-size:4rem;}
    .hero{padding:0 5%;}
    .projects{padding:60px 5%;}
}

@media(max-width:900px){
    .hero h1{font-size:3rem;}
    .hero{flex-direction:column;justify-content:center;gap:30px;text-align:center;padding-top:80px;}
    .hero-content{margin:0 auto;text-align:center;}
    .software-stack{flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:center;}
    .portfolio-layout{grid-template-columns:1fr;}
    .tree-menu{flex-direction:row;flex-wrap:wrap;justify-content:center;}
    .tree-menu button{flex:1 1 200px;max-width:280px;text-align:center;}
}

@media(max-width:600px){
    .hero{height:100vh;padding-top:60px;}
    .hero h1{font-size:2.2rem;}
    .hero p{font-size:0.95rem;}
    .social-links{justify-content:center;}
    .social-links img{width:35px;height:35px;}
    .software-stack img{width:40px;height:40px;}
    .projects{padding:40px 5%;}
    .section-title{font-size:1.8rem;text-align:center;}
    .tree-menu{gap:10px;}
    .tree-menu button{padding:14px;font-size:0.9rem;}
    .project-grid{grid-template-columns:1fr;gap:20px;}
    .card{border-radius:14px;}
    .thumbnail img{height:auto;}
    .video-title{font-size:1rem;bottom:12px;left:12px;}
    .card-content{padding:15px;}
    .card-content p{font-size:0.9rem;}
    .btn{padding:8px 18px;font-size:0.9rem;}
    .footer{padding:25px 15px;font-size:0.9rem;}
}

@media(max-width:400px){
    .hero h1{font-size:1.9rem;}
    .hero p{font-size:0.85rem;}
    .social-links img{width:30px;height:30px;}
    .software-stack img{width:35px;height:35px;}
    .tree-menu button{padding:12px;font-size:0.85rem;}
}