/* ==========================================================================
   CSS Variables & Theming
   ========================================================================== */
:root {
    /* Color Palette */
    --bg-dark: #0a0f16;
    --bg-card: rgba(17, 25, 40, 0.7);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;

    /* Accents */
    --neon-cyan: #00f0ff;
    --neon-green: #00ff9d;
    --accent-glow: rgba(0, 240, 255, 0.5);

    /* Typography */
    --font-sans: 'Inter', -apple-system, system-ui, sans-serif;
    --font-mono: 'Fira Code', monospace;

    /* Spacing & Sizes */
    --nav-height: 80px;
    --section-pad: clamp(40px, 10vw, 100px);

    /* Effects */
    --transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
    --border-glass: 1px solid rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   Base Reset
   ========================================================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--neon-cyan) var(--bg-dark);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background-color: var(--neon-cyan);
    border-radius: 4px;
}

/* Selection */
::selection {
    background-color: var(--neon-cyan);
    color: var(--bg-dark);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-pad) 0;
}

/* Typography Headers */
h1,
h2,
h3,
h4 {
    color: var(--text-primary);
    line-height: 1.2;
}

.section-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50%;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-cyan), transparent);
}

/* ==========================================================================
   Background Animations
   ========================================================================== */
.bg-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    animation: float 20s infinite alternate;
}

.shape-1 {
    width: 50vw;
    height: 50vw;
    background: var(--neon-cyan);
    top: -10vw;
    left: -10vw;
}

.shape-2 {
    width: 40vw;
    height: 40vw;
    background: var(--neon-green);
    bottom: -10vw;
    right: -10vw;
    animation-delay: -5s;
}

.shape-3 {
    width: 30vw;
    height: 30vw;
    background: #7000ff;
    /* Purple accent */
    top: 40%;
    left: 40%;
    animation-delay: -10s;
}

@keyframes float {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(100px, 100px);
    }
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(10, 15, 22, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: var(--border-glass);
    z-index: 100;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    height: calc(var(--nav-height) - 10px);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-cyan);
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--neon-cyan);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--neon-cyan);
}

/* Hamburger Menu (Mobile) */
.hamburger {
    display: none;
    cursor: pointer;
    z-index: 101;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: var(--transition);
    background-color: var(--neon-cyan);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-align: center;
}

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

.btn-primary:hover {
    background: rgba(0, 240, 255, 0.1);
    box-shadow: 0 0 15px var(--accent-glow);
}

.btn-secondary {
    background: var(--neon-cyan);
    color: var(--bg-dark);
    border: 1px solid var(--neon-cyan);
}

.btn-secondary:hover {
    background: transparent;
    color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
}

.hero-container {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 2rem;
    align-items: center;
}

.greeting {
    font-family: var(--font-mono);
    color: var(--neon-cyan);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.name {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.5rem;
}

.title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.summary {
    max-width: 600px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

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

/* Code Window Graphic */
.code-window {
    background: #1e1e1e;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border: var(--border-glass);
}

.window-header {
    background: #2d2d2d;
    padding: 10px;
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red {
    background: #ff5f56;
}

.dot.yellow {
    background: #ffbd2e;
}

.dot.green {
    background: #27c93f;
}

.window-body {
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
    color: #e6e6e6;
    overflow-x: auto;
}

.keyword {
    color: #ff7b72;
}

.classname {
    color: #d2a8ff;
}

.string {
    color: #a5d6ff;
}

.this {
    color: #79c0ff;
}

.method {
    color: #d2a8ff;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-content {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-highlight {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.highlight-card {
    background: var(--bg-card);
    border: var(--border-glass);
    padding: 1.5rem;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.highlight-card:hover {
    transform: translateY(-5px);
    border-color: var(--neon-cyan);
}

.highlight-icon {
    font-size: 2rem;
    color: var(--neon-green);
    margin-bottom: 1rem;
}

.highlight-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.highlight-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ==========================================================================
   Education Section
   ========================================================================== */
.education-content {
    max-width: 800px;
    margin: 0 auto;
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: var(--border-glass);
}

.uni-name {
    font-size: 1.5rem;
    color: var(--neon-cyan);
    margin-bottom: 0.5rem;
}

.uni-degree {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
}

.status-badge {
    background: rgba(0, 255, 157, 0.1);
    color: var(--neon-green);
    border: 1px solid var(--neon-green);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-mono);
    white-space: nowrap;
}

.coursework h4 {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.course-tags li {
    background: rgba(255, 255, 255, 0.05);
    border: var(--border-glass);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: var(--transition);
}

.course-tags li:hover {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    transform: translateY(-2px);
}

@media (max-width: 600px) {
    .education-header {
        flex-direction: column;
        gap: 1rem;
    }
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: var(--border-glass);
    border-radius: 12px;
    padding: 2rem;
    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -10px rgba(0, 240, 255, 0.2);
}

.skill-category h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.5rem;
    color: var(--neon-cyan);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.skill-tag {
    background: rgba(255, 255, 255, 0.05);
    border: var(--border-glass);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: var(--transition);
    cursor: default;
}

.skill-tag:hover {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.15);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: var(--bg-card);
    border: var(--border-glass);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 240, 255, 0.15);
    border-color: rgba(0, 240, 255, 0.2);
}

.project-image-wrapper {
    overflow: hidden;
    border-bottom: var(--border-glass);
    aspect-ratio: 16 / 9;
}

.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-image {
    transform: scale(1.05);
}

.project-info {
    padding: 1.5rem 2rem 2rem;
}

.project-info-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.project-title {
    font-size: 1.4rem;
    margin-bottom: 0;
    color: var(--text-primary);
}

.project-github {
    font-size: 1.4rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.project-github:hover {
    color: var(--neon-cyan);
    transform: scale(1.2);
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.project-tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.project-tech-list li {
    background: rgba(0, 240, 255, 0.1);
    padding: 4px 10px;
    border-radius: 4px;
    color: var(--neon-cyan);
}

@media (max-width: 500px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.contact-content p {
    color: var(--text-secondary);
    margin: 1.5rem 0 2rem;
}

.contact-info {
    margin-bottom: 2rem;
}

.contact-link {
    font-size: 1.2rem;
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.contact-link:hover {
    color: var(--neon-cyan);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.social-icon {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.social-icon:hover {
    color: var(--neon-cyan);
    transform: translateY(-3px);
}

.mt-4 {
    margin-top: 1rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    text-align: center;
    padding: 2rem 0;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-top: var(--border-glass);
}

/* ==========================================================================
   Back to Top Button
   ========================================================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: rgba(0, 240, 255, 0.15);
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-3px);
}

/* ==========================================================================
   Animations & Interactivity Classes
   ========================================================================== */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-up.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .cta-group {
        justify-content: center;
    }

    .hero-image {
        display: none;
        /* Hide code block on smaller screens for focus */
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-links {
        position: fixed;
        left: -100%;
        top: var(--nav-height);
        flex-direction: column;
        background: var(--bg-dark);
        width: 100%;
        height: calc(100vh - var(--nav-height));
        text-align: center;
        transition: 0.3s;
        padding-top: 2rem;
    }

    .nav-links.active {
        left: 0;
    }

    .nav-link {
        font-size: 1.2rem;
    }
}