:root {
    --bg: #0a0c10;
    --card-bg: #0f172a;
    --primary: #94a3b8; /* Refined Slate */
    --accent: #38bdf8;  /* Soft Sky Blue */
    --text: #f1f5f9;
    --text-dim: #94a3b8;
    --border: rgba(255, 255, 255, 0.05);
    --font-header: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Fixed Global Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 25px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(10, 12, 16, 0.85);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 400;
    font-size: 0.9rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--text);
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    margin-left: 30px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: color 0.3s;
}

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

/* Hero - Expanded 6-Image Gallery Fade */
.hero {
    position: relative;
    padding: 220px 0 160px 0; /* Adjusted for fixed nav */
    margin-bottom: 80px;
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}

.hero-gallery {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: -1;
}

.hero-layer {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    opacity: 0;
    animation: heroFade 30s infinite;
}

.hero-layer:nth-child(2) { animation-delay: 5s; }
.hero-layer:nth-child(3) { animation-delay: 10s; }
.hero-layer:nth-child(4) { animation-delay: 15s; }
.hero-layer:nth-child(5) { animation-delay: 20s; }
.hero-layer:nth-child(6) { animation-delay: 25s; }

@keyframes heroFade {
    0% { opacity: 0; }
    5% { opacity: 1; }
    16% { opacity: 1; }
    21% { opacity: 0; }
    100% { opacity: 0; }
}

.hero::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(rgba(10, 12, 16, 0.6), rgba(10, 12, 16, 0.9));
    z-index: -1;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 300;
    line-height: 1.1;
    margin-bottom: 30px;
    letter-spacing: -0.02em;
    max-width: 800px;
}

.hero strong {
    font-weight: 600;
    color: var(--text);
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-dim);
    max-width: 550px;
    margin-bottom: 40px;
    font-weight: 300;
}

/* Precise Stats Section */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    margin-bottom: 100px;
}

.stat-item {
    background: var(--bg);
    padding: 30px 20px;
    text-align: center;
}

.stat-item h3 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 5px;
    color: var(--accent);
}

.stat-item p {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-dim);
}

/* Refined Section Titles */
.section-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent);
    margin-bottom: 20px;
    display: block;
}

/* Project Cards - Focused & Clean */
.project-list {
    display: flex;
    flex-direction: column;
    gap: 100px;
    margin-bottom: 150px;
}

.project-entry {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: flex-start;
}

.project-details h4 {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 15px;
}

.client-meta {
    font-size: 0.7rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 25px;
    display: block;
}

.project-details p {
    font-size: 0.95rem;
    color: var(--text-dim);
    margin-bottom: 25px;
    font-weight: 300;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tech-tag {
    font-size: 0.65rem;
    padding: 4px 12px;
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--text-dim);
    letter-spacing: 1px;
}

/* Fixed Impact Strips */
.impact-strip {
    width: 100%;
    height: 350px;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    margin: 80px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    position: relative;
}

.field-collage {
    width: 100%;
    height: 450px;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    margin: 100px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    position: relative;
    filter: grayscale(20%); /* Subtle professional desaturation */
    transition: filter 0.5s;
}

.field-collage:hover {
    filter: grayscale(0%);
}

.impact-strip::after, .field-collage::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(10, 12, 16, 0.3);
}

.project-visual {
    aspect-ratio: 16/9;
    background: #111;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.project-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.5;
    transition: opacity 0.5s;
}

.project-entry:hover .project-visual img {
    opacity: 0.8;
}

/* Stack Section - Grid layout */
.stack-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    padding: 60px 0;
    border-top: 1px solid var(--border);
}

.stack-category h5 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    color: var(--accent);
}

.stack-category ul {
    list-style: none;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.stack-category li {
    margin-bottom: 8px;
    font-weight: 300;
}

footer {
    padding: 80px 0;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.75rem;
    letter-spacing: 1px;
    color: var(--text-dim);
}

.nav-linkedin {
    color: var(--text-dim);
    margin-left: 8px;
    vertical-align: middle;
    transition: color 0.3s;
}

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

.linkedin-link {
    display: inline-block;
    margin-top: 20px;
    color: var(--text-dim);
    transition: color 0.3s;
}

.linkedin-link:hover {
    color: var(--accent);
}

@media (max-width: 640px) {
    .project-entry { grid-template-columns: 1fr; gap: 30px; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .timeline-item { grid-template-columns: 1fr; gap: 10px; }
    .hero { padding: 180px 0 200px 0; }
    .hero h1 { font-size: 2rem; }
    .hero-layer {
        background-attachment: scroll !important;
        background-size: cover !important;
        background-position: center top;
    }
    .impact-strip {
        background-attachment: scroll !important;
        background-size: cover !important;
        height: 200px;
        background-position: center top;
    }
    .field-collage {
        background-attachment: scroll !important;
        background-size: cover !important;
        height: 200px;
        background-position: center center;
    }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .stack-grid { grid-template-columns: 1fr; }
    nav { padding: 15px 0; }
    .nav-links { display: none; }
}