/* =====================================================
   ENGINEERING PORTFOLIO DESIGN SYSTEM
   ===================================================== */

/* ---------- Google Font ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ---------- CSS Variables ---------- */
:root{

    --bg-primary:#0B1120;
    --bg-secondary:#111827;
    --bg-card:#1F2937;

    --text-primary:#F9FAFB;
    --text-secondary:#9CA3AF;

    --accent:#38BDF8;
    --accent-hover:#0EA5E9;

    --border:#374151;

    --success:#10B981;
    --warning:#F59E0B;
    --danger:#EF4444;

    --shadow:0 10px 30px rgba(0,0,0,.25);

    --radius:14px;

    --transition:.3s ease;
}

/* ---------- Light Theme ---------- */

body.light{

    --bg-primary:#FFFFFF;
    --bg-secondary:#F3F4F6;
    --bg-card:#FFFFFF;

    --text-primary:#111827;
    --text-secondary:#4B5563;

    --border:#D1D5DB;
}

/* ---------- Reset ---------- */

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

html{
    scroll-behavior:smooth;
}

body{

    font-family:'Inter',sans-serif;

    background:var(--bg-primary);

    color:var(--text-primary);

    line-height:1.7;

    transition:background var(--transition),
               color var(--transition);
}

/* ---------- Links ---------- */

a{

    color:inherit;

    text-decoration:none;

}

/* ---------- Images ---------- */

img{

    width:100%;

    display:block;

}

/* ---------- Container ---------- */

.container{

    width:min(1200px,92%);

    margin:auto;

}

/* ---------- Sections ---------- */

.section{

    padding:90px 0;

}

/* ---------- Headings ---------- */

h1{

    font-size:clamp(2.8rem,5vw,4.8rem);

    line-height:1.1;

    font-weight:800;

}

h2{

    font-size:2.2rem;

    margin-bottom:20px;

}

h3{

    font-size:1.35rem;

    margin-bottom:12px;

}

p{

    color:var(--text-secondary);

}

/* ---------- Buttons ---------- */

.btn{

    display:inline-flex;

    align-items:center;

    justify-content:center;

    padding:14px 28px;

    border-radius:10px;

    font-weight:600;

    transition:var(--transition);

    cursor:pointer;

}

.btn-primary{

    background:var(--accent);

    color:white;

}

.btn-primary:hover{

    background:var(--accent-hover);

    transform:translateY(-2px);

}

.btn-outline{

    border:1px solid var(--accent);

    color:var(--accent);

}

.btn-outline:hover{

    background:var(--accent);

    color:white;

}

/* ---------- Navbar ---------- */

.navbar{

    position:sticky;

    top:0;

    z-index:1000;

    backdrop-filter:blur(12px);

    background:rgba(11,17,32,.85);

    border-bottom:1px solid var(--border);

}

body.light .navbar{

    background:rgba(255,255,255,.9);

}

.nav-container{

    display:flex;

    justify-content:space-between;

    align-items:center;

    height:75px;

}

.logo{

    font-size:1.4rem;

    font-weight:800;

    color:var(--accent);

}

.nav-links{

    display:flex;

    gap:28px;

    list-style:none;

}

.nav-links a{

    transition:var(--transition);

}

.nav-links a:hover{

    color:var(--accent);

}

/* ---------- Hero ---------- */

.hero{

    min-height:90vh;

    display:flex;

    align-items:center;

}

.hero-content{

    max-width:700px;

}

.hero span{

    color:var(--accent);

}

/* ---------- Grid ---------- */

.grid{

    display:grid;

    gap:28px;

}

.grid-2{

    grid-template-columns:repeat(auto-fit,minmax(320px,1fr));

}

.grid-3{

    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));

}

/* ---------- Cards ---------- */

.card{

    background:var(--bg-card);

    border:1px solid var(--border);

    border-radius:var(--radius);

    padding:28px;

    box-shadow:var(--shadow);

    transition:var(--transition);

}

.card:hover{

    transform:translateY(-6px);

}

/* ---------- Tags ---------- */

.tech-tags{

    display:flex;

    flex-wrap:wrap;

    gap:10px;

    margin-top:18px;

}

.tech-tags span{

    padding:8px 14px;

    background:rgba(56,189,248,.15);

    color:var(--accent);

    border-radius:999px;

    font-size:.9rem;

}

/* ---------- Footer ---------- */

footer{

    padding:40px 0;

    border-top:1px solid var(--border);

    text-align:center;

    color:var(--text-secondary);

}

/* ---------- Reveal Animation ---------- */

.reveal{

    opacity:0;

    transform:translateY(30px);

    transition:.7s ease;

}

.reveal.active{

    opacity:1;

    transform:translateY(0);

}

/* ---------- Back to Top ---------- */

.back-top{

    position:fixed;

    bottom:30px;

    right:30px;

    width:50px;

    height:50px;

    border:none;

    border-radius:50%;

    background:var(--accent);

    color:white;

    cursor:pointer;

    display:none;

}

.back-top.show{

    display:block;

}

/* ---------- Responsive ---------- */

.menu-toggle{

    display:none;

    background:none;

    border:none;

    color:var(--text-primary);

    font-size:1.8rem;

    cursor:pointer;

}

@media(max-width:768px){

    .nav-links{

        display:none;

        position:absolute;

        top:75px;

        left:0;

        width:100%;

        background:var(--bg-card);

        flex-direction:column;

        padding:20px;

    }

    .nav-links.active{

        display:flex;

    }

    .menu-toggle{

        display:block;

    }

    .hero{

        min-height:70vh;

    }

    h1{

        font-size:2.7rem;

    }

}

/* Active Navigation */

.active-link{

    color:var(--accent);

    font-weight:700;

}

/* Lightbox */

.lightbox-overlay{

    position:fixed;

    inset:0;

    background:rgba(0,0,0,.92);

    display:flex;

    justify-content:center;

    align-items:center;

    opacity:0;

    visibility:hidden;

    transition:.3s;

    z-index:9999;

}

.lightbox-overlay.show{

    opacity:1;

    visibility:visible;

}

.lightbox-image{

    max-width:90%;

    max-height:90%;

    border-radius:10px;

}

.lightbox-close{

    position:absolute;

    top:30px;

    right:40px;

    font-size:42px;

    color:white;

    cursor:pointer;

}

/* =====================================
   Experience Timeline
===================================== */


.timeline{

    display:flex;

    flex-direction:column;

    gap:30px;

    position:relative;

}


.timeline .card{

    border-left:4px solid var(--accent);

}


/* =====================================
   Contact Form
===================================== */


form{

    display:flex;

    flex-direction:column;

    gap:15px;

}


input,
textarea{

    width:100%;

    padding:14px;

    border-radius:8px;

    border:1px solid var(--border);

    background:var(--bg-primary);

    color:var(--text-primary);

    font-family:inherit;

}


textarea{

    resize:vertical;

}


label{

    font-weight:600;

}

/* =====================================
   Project Gallery
===================================== */

.gallery img{

    height:220px;

    object-fit:cover;

    cursor:pointer;

    transition:.3s;

}


.gallery img:hover{

    transform:scale(1.03);

}


/* =====================================
   Hero Profile Image
===================================== */


.hero-layout{

    display:grid;

    grid-template-columns:1.2fr .8fr;

    align-items:center;

    gap:50px;

}


.hero-image{
    display:flex;
    justify-content:center;
    align-items:center;
}

.hero-image img{
    width:320px;
    height:320px;
    object-fit:cover;

    /* Move the image downward so more forehead is visible */
    object-position:center 20%;

    border-radius:50%;
    border:4px solid var(--accent);
}



@media(max-width:768px){


.hero-layout{

    grid-template-columns:1fr;

    text-align:center;

}


.hero-image{

    order:-1;

}


}

.hero-buttons{
    display:flex;
    gap:20px;
    flex-wrap:wrap;
    margin-top:30px;
}

/* =====================================
   Contact Page
===================================== */


.contact-card{

    max-width:800px;

    margin:auto;

    text-align:center;

}


.contact-items{

    display:grid;

    grid-template-columns:repeat(3,1fr);

    gap:30px;

    margin-top:40px;

}



.contact-item{

    padding:20px;

    border-radius:10px;

    background:var(--card-bg);

}



.contact-item h3{

    margin-bottom:15px;

}



.contact-item a{

    color:var(--accent);

    word-break:break-word;

}



@media(max-width:768px){


.contact-items{

    grid-template-columns:1fr;

}


}

/* Contact Header */

.contact-header{

    text-align:center;

    max-width:700px;

    margin:auto;

}


.contact-header h1{

    font-size:2.5rem;

}


.contact-header p{

    margin-top:20px;

    font-size:1.05rem;

}

.video-container {
    width: 100%;
    max-width: 900px;
    margin: auto;
}

.video-container video {
    width: 100%;
    height: auto;
    border-radius: 12px;
}

.card img {
    width: 100%;
    height: 220px;      /* Same height for all images */
    object-fit: cover;  /* Crops image while preserving aspect ratio */
    object-position: center;
    display: block;
    border-radius: 10px;
}

.architecture-img {
    width: 100%;
    max-width: 900px;
    height: auto !important;
    max-height: none !important;
    object-fit: contain !important;
    display: block;
    margin: 2rem auto;
}

.data-unit {
    margin-top: 30px;
}