/* =========================================
   1. Base Styles & Theme Variables
========================================= */
:root {
    --bg-color: #070b19; /* Deeper space navy */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --card-bg: rgba(30, 41, 59, 0.85); /* Slightly translucent for stars */
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

/* =========================================
   2. Parallax Star Layers
========================================= */
.parallax-bg {
    position: fixed;
    top: -50%; 
    left: 0;
    width: 100%;
    height: 200%; 
    pointer-events: none;
    z-index: -1;
    background-repeat: repeat; 
    will-change: transform; 
}

#bg-far {
    background-image: 
        radial-gradient(1.5px 1.5px at 15% 25%, #ffffff, transparent),
        radial-gradient(1.5px 1.5px at 35% 75%, #ffffff, transparent),
        radial-gradient(1.5px 1.5px at 75% 15%, #ffffff, transparent),
        radial-gradient(1.5px 1.5px at 85% 85%, #ffffff, transparent),
        radial-gradient(2px 2px at 55% 55%, #ffffff, transparent),
        radial-gradient(1.5px 1.5px at 25% 95%, #ffffff, transparent);
    background-size: 300px 300px; 
    opacity: 0.3;
}

#bg-mid {
    background-image: 
        radial-gradient(3px 3px at 10% 10%, #38bdf8, transparent),
        radial-gradient(2px 2px at 40% 30%, #ffffff, transparent),
        radial-gradient(3px 3px at 80% 60%, #ffffff, transparent),
        radial-gradient(3px 3px at 30% 80%, #38bdf8, transparent),
        radial-gradient(2px 2px at 90% 20%, #ffffff, transparent);
    background-size: 500px 500px;
    opacity: 0.6;
}

#bg-near {
    background-image: 
        radial-gradient(4px 4px at 20% 50%, #ffffff, transparent),
        radial-gradient(15px 15px at 20% 50%, rgba(56, 189, 248, 0.3), transparent),
        radial-gradient(4px 4px at 70% 20%, #ffffff, transparent),
        radial-gradient(6px 6px at 85% 80%, #38bdf8, transparent),
        radial-gradient(18px 18px at 85% 80%, rgba(56, 189, 248, 0.2), transparent),
        radial-gradient(ellipse 10px 1.5px at 40% 90%, #ffffff, transparent),
        radial-gradient(ellipse 1.5px 10px at 40% 90%, #ffffff, transparent);
    background-size: 700px 700px;
    opacity: 0.9;
}

/* =========================================
   3. Navigation
========================================= */
nav {
    display: flex;
    justify-content: space-between;
    padding: 1.5rem 5%;
    background-color: rgba(7, 11, 25, 0.95);
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid rgba(56, 189, 248, 0.1);
    backdrop-filter: blur(5px);
}

.logo {
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
    color: rgb(255, 255, 255);
    letter-spacing: 2px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    align-items: center;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent);
}

/* =========================================
   4. Hero Section & Buttons
========================================= */
.hero {
    text-align: center;
    padding: 7rem 5% 5rem;
    max-width: 800px;
    margin: auto;
}

.hero h1 {
    font-size: 3.2rem;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}


.hero h2 {
    color: var(--accent);
    font-weight: 400;
    letter-spacing: 1px;
    font-size: 2rem; /* Add this line to make it larger but smaller than the 3.2rem h1 */
    margin-bottom: 20px;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.5rem;
    margin-bottom: 50px;
    margin-top: 0px;
    line-height: 1;
}

.btn {
    background-color: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
    padding: 0.8rem 1.8rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.1);
}

.btn:hover {
    background-color: var(--accent);
    color: #070b19;
    box-shadow: 0 0 25px rgba(56, 189, 248, 0.4);
}

/* =========================================
   5. Grid Sections (Projects & Skills)
========================================= */
.projects-section, .skills-section {
    padding: 4rem 5%;
    max-width: 1000px;
    margin: auto;
}

.projects-section h2, .skills-section h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    font-size: 2rem;
    letter-spacing: 1px;
}

.project-grid, .skills-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr); 
    gap: 2rem;
}

.project-card, .skill-category {
    background-color: var(--card-bg);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    border-top: 3px solid var(--accent);
    border-left: 1px solid rgba(56, 189, 248, 0.1);
    border-right: 1px solid rgba(56, 189, 248, 0.1);
    border-bottom: 1px solid rgba(56, 189, 248, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover, .skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.15);
}

.read-more {
    display: inline-block;
    margin-top: 1.5rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: letter-spacing 0.2s;
}

.read-more:hover {
    letter-spacing: 0.5px;
}

/* =========================================
   6. Case Study Layout & Typography
========================================= */
.case-study {
    max-width: 800px;
    margin: 4rem auto;
    padding: 0 5%;
}

.tech-stack {
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: 3rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
    padding-bottom: 1rem;
}

.project-content h3 {
    margin-top: 2.5rem;
    color: var(--text-main);
}

.project-content p {
    color: var(--text-muted);
}

/* =========================================
   7. Images, Columns & Captions
========================================= */
/* Shared Base Styles for all images */
.zeeman-img, .alpha-img {
    display: block; 
    margin: 0 auto;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid rgba(56, 189, 248, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    max-width: 100%;
}
.profile-img {
    display: block; 
    margin: 0 auto;
    object-fit: cover;
    /* X-axis (horizontal) is 70%, Y-axis (vertical) is 20% */
    object-position: 70% 10%; 
    border-radius: 1000px;
    border: 1px solid rgba(56, 189, 248, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 300px; 
    height: 300px; 
    max-width: 100%;
}

.profile-img-two {
    display: block; 
    margin: 0 auto;
    object-fit: cover;
    /* X-axis (horizontal) is 70%, Y-axis (vertical) is 20% */
    /* object-position: 70% 10%;  */
    object-position: 70% 70%; 
    border-radius: 10px;
    border: 1px solid rgba(56, 189, 248, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 600px; 
    height: 400px; 
    max-width: 100%;
}
.zeeman-img { width: 400px; height: 600px; }
.alpha-img { height: 300px; } /* Default height if not in a column */

.primecam-img { 
    display: block; 
    margin: 0 auto;
    object-fit: cover;
    /* X-axis (horizontal) is 70%, Y-axis (vertical) is 20% */
    /* object-position: 70% 10%;  */
    border-radius: 10px;
    border: 1px solid rgba(56, 189, 248, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 600px; 
    height: 600px; 
    max-width: 100%;
}

/* Standalone Caption */
.image-caption {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
    margin: 0.8rem auto 2rem;
    max-width: 400px;
}

/* Side-by-Side Image Row Container */
.image-row {
    display: flex;
    justify-content: center;
    align-items: center; /* This vertically centers the images with each other */
    gap: 2rem;
    margin: 2rem auto;
}

/* Individual Column within the Row */
.image-col {
    margin: 0;
    flex: 1; 
    max-width: 48%; 
    display: flex;
    flex-direction: column;
}

/* Overrides for images and captions inside a column */
.image-col .alpha-img {
    width: 100%;
    height: auto;
}

.image-col .image-caption {
    width: 100%;
    max-width: none;
    margin-top: auto; /* Pushes the caption to the bottom of the column */
    margin-bottom: 0;
    padding-top: 0.8rem; /* Adds the spacing back above the text */
}

/* =========================================
   8. Footer
========================================= */
footer {
    text-align: center;
    padding: 2.5rem;
    color: var(--text-muted);
    border-top: 1px solid rgba(56, 189, 248, 0.1);
    margin-top: 4rem;
    background-color: rgba(7, 11, 25, 0.8);
    font-size: 0.95rem;
}

/* =========================================
   9. Mobile Responsiveness
========================================= */
@media (max-width: 768px) {
    /* Collapse grids to single column */
    .project-grid, .skills-container {
        grid-template-columns: 1fr;
    }

    /* Stack image rows */
    .image-row {
        flex-direction: column;
        align-items: center;
    }
    
    .image-col {
        max-width: 100%;
        margin-bottom: 2rem;
    }
}