:root {
    --bg-dark: #0a0a0a;
    --bg-light: #111111;
    --bg-lighter: #1a1a1a;
    
    --text-main: #e5e5e5;
    --text-muted: #888888;
    
    --accent: #00d2ff; /* Tech cyan/blue */
    --accent-glow: rgba(0, 210, 255, 0.15);
    
    --border-color: #333333;
    --border-hover: #555555;
    
    --font-sans: 'Inter', -apple-system, system-ui, sans-serif;
    --font-mono: 'Fira Code', 'JetBrains Mono', monospace;
    
    --transition: all 0.3s ease-in-out;
}

/* Global Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: default; /* We will add a custom glow behind the cursor if possible, but keep normal cursor */
}

/* Custom Cursor Glow */
.cursor-glow {
    width: 40px;
    height: 40px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: transform 0.1s ease;
    mix-blend-mode: screen;
}

/* Typography Helpers */
.mono {
    font-family: var(--font-mono);
    font-size: 0.9rem;
}
.accent {
    color: var(--accent);
}
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }

/* Selection */
::selection {
    background-color: var(--accent-glow);
    color: var(--text-main);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Links */
a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--text-main);
}

/* Base Headings */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: #ffffff;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
}

.btn-primary:hover {
    background-color: var(--accent-glow);
    box-shadow: 0 0 10px var(--accent-glow);
    color: #fff;
    border-color: #fff;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    margin-left: 0.5rem;
    padding: 0.75rem 1rem;
}

.btn-outline:hover {
    border-color: var(--text-main);
    background-color: var(--bg-lighter);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: 80px;
    z-index: 100;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

nav.scrolled {
    height: 60px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links li a {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

.hamburger {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--accent);
}

/* Layout Mains */
main {
    margin: 0 auto;
    width: 100%;
    max-width: 1200px;
    padding: 0 2rem;
}

section {
    padding: 100px 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section-heading {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    width: 100%;
}

.section-heading h2 {
    font-size: 2rem;
    margin-bottom: 0;
    display: flex;
    align-items: center;
}

.section-heading span {
    font-size: 1.2rem;
    margin-right: 1rem;
}

.section-heading .line {
    height: 1px;
    background-color: var(--border-color);
    flex-grow: 1;
    margin-left: 2rem;
    max-width: 300px;
}

/* Cards */
.card {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* Hero Section */
.hero {
    align-items: flex-start;
}

.hero p.accent {
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.5rem;
}

.hero h2 {
    font-size: 3rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 2rem;
}

.hero p.hero-desc {
    max-width: 600px;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

/* Expertise Section */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.expertise-card {
    display: flex;
    flex-direction: column;
}

.expertise-card i {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.expertise-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #fff;
}

.expertise-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    flex-grow: 1;
    margin-bottom: 1rem;
}

.skills-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-category h3 {
    font-size: 1rem;
    color: #fff;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tags span {
    background-color: var(--bg-lighter);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.3rem 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-main);
    transition: var(--transition);
}
.tags span:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Code Window */
.code-window {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.code-window::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, var(--accent-glow), transparent 60%);
    opacity: 0.5;
    pointer-events: none;
}

.window-header {
    background-color: var(--bg-lighter);
    padding: 0.75rem 1rem;
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot.red { background-color: #ff5f56; }
.dot.yellow { background-color: #ffbd2e; }
.dot.green { background-color: #27c93f; }

.window-body {
    padding: 1.5rem;
    font-size: 0.85rem;
    color: #e5e5e5;
    line-height: 1.8;
}

.keyword { color: #ff7b72; }
.variable { color: #d2a8ff; }
.string { color: #a5d6ff; }
.boolean { color: #79c0ff; }

/* Experience Timeline */
.timeline {
    position: relative;
    max-width: 800px;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 1px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 3rem;
}

.timeline-dot {
    position: absolute;
    left: 14px;
    top: 0;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background-color: var(--bg-dark);
    border: 2px solid var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.2rem;
}

.timeline-content h4 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.duration {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.timeline-content ul {
    list-style-type: square;
    padding-left: 1.2rem;
    color: var(--text-muted);
}
.timeline-content li {
    margin-bottom: 0.5rem;
}
.timeline-content li::marker {
    color: var(--accent);
}

/* Projects Grid */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.project-icon {
    font-size: 2.5rem;
    color: var(--accent);
}

.project-links a {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-left: 1rem;
}

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

.project-title {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #fff;
    transition: var(--transition);
}

.project-card:hover .project-title {
    color: var(--accent);
}

.project-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Contact */
.contact-wrap {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-wrap p.accent {
    margin-bottom: 1rem;
}

.contact-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.contact-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* Footer */
footer {
    padding: 3rem 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.social-links a {
    font-size: 1.5rem;
    color: var(--text-muted);
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

.footer-text p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero h1 { font-size: 3.8rem; }
    .hero h2 { font-size: 2.5rem; }
    section { padding: 80px 0; }
}

@media (max-width: 868px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--bg-dark);
        padding: 2rem;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    .nav-links.active {
        display: flex;
    }
    .hamburger {
        display: block;
    }

    .hero h1 { font-size: 3.2rem; }
    .hero h2 { font-size: 2.2rem; }
    
    .expertise-grid { grid-template-columns: 1fr; }
    .project-grid { grid-template-columns: 1fr; }
    .section-heading .line { max-width: 150px; }
    
    .contact-title { font-size: 3rem; }
}

@media (max-width: 600px) {
    main { padding: 0 1.5rem; }
    .nav-content { padding: 0 1.5rem; }
    
    section { padding: 60px 0; }
    
    .hero h1 { font-size: 2.6rem; }
    .hero h2 { font-size: 1.8rem; }
    .hero-desc { font-size: 1rem; }
    
    /* Stack CTA buttons on mobile */
    .hero-cta { flex-direction: column; width: 100%; }
    .btn-outline { margin-left: 0; }
    
    /* Modify section headers for narrow screens */
    .section-heading { flex-direction: column; align-items: flex-start; margin-bottom: 2rem; }
    .section-heading .line { display: none; } /* Hide the line constraint on very small devices */
    
    /* Timeline adjustments */
    .timeline::before { left: 9px; }
    .timeline-item { padding-left: 35px; }
    .timeline-dot { left: 3px; width: 11px; height: 11px; }

    .card { padding: 1.5rem; }
    .contact-title { font-size: 2.2rem; }
}

@media (max-width: 400px) {
    .hero h1 { font-size: 2.2rem; }
    .hero h2 { font-size: 1.5rem; }
    .section-heading h2 { font-size: 1.5rem; }
    .contact-title { font-size: 1.8rem; }
}