/* --- CSS Variables --- */
:root {
    /* Colors */
    --bg-main: #0b0f19;
    --bg-surface: #111827;
    --bg-surface-light: #1f2937;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    
    /* Accents - Dynamic Electric Blue / Indigo */
    --accent-primary: #38bdf8;
    --accent-secondary: #818cf8;
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Metrics */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 24px;
}

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-primary);
}

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

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

.section-padding {
    padding: 100px 5%;
}

.section-heading {
    text-align: center;
    margin-bottom: 60px;
}

.section-heading h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.section-heading .underline {
    width: 60px;
    height: 4px;
    background: var(--accent-gradient);
    margin: 0 auto;
    border-radius: 2px;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-medium);
    border: none;
    outline: none;
    text-align: center;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(56, 189, 248, 0.5);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent-secondary);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: rgba(129, 140, 248, 0.1);
    transform: translateY(-2px);
}

.btn-block {
    display: block;
    width: 100%;
}

/* --- Navigation --- */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-medium);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span {
    color: var(--accent-primary);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: var(--transition-medium);
}

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

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 80px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.greeting {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.name {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 10px;
    background: -webkit-linear-gradient(0deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.role {
    font-size: 2rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-weight: 500;
}

.bio {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.social-links {
    display: flex;
    gap: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-surface);
    color: var(--text-primary);
    font-size: 1.2rem;
    transition: var(--transition-medium);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

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

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    position: relative;
}

.image-wrapper {
    position: relative;
    width: 400px;
    height: 400px;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    overflow: hidden;
    animation: morph 8s ease-in-out infinite;
    z-index: 2;
    border: 4px solid var(--bg-surface);
    box-shadow: 0 0 40px rgba(56, 189, 248, 0.2);
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes morph {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    50% { border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%; }
    100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
}

/* Cursor Animation for Typing Effect */
.cursor {
    display: inline-block;
    width: 3px;
    background-color: var(--accent-primary);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* --- About Section --- */
.about-content {
    display: flex;
    gap: 50px;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
}

.about-text {
    flex: 2;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.about-stats {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.stat-box {
    background: var(--bg-surface);
    padding: 30px;
    border-radius: var(--border-radius-md);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-medium);
}

.stat-box:hover {
    transform: translateY(-5px);
    border-color: rgba(56, 189, 248, 0.3);
}

.stat-box h3 {
    font-size: 3rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 5px;
}

/* --- Skills Section --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.skill-category {
    background: var(--bg-surface);
    padding: 40px 30px;
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-medium);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border-color: rgba(129, 140, 248, 0.3);
}

.skill-category h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

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

.skill-tags span {
    background: var(--bg-surface-light);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.skill-tags span:hover {
    background: var(--accent-gradient);
    color: #fff;
}

/* --- Education Section --- */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    height: 100%;
    width: 2px;
    background: var(--bg-surface-light);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 40px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 11px;
    top: 5px;
    width: 20px;
    height: 20px;
    background: var(--bg-main);
    border: 4px solid var(--accent-primary);
    border-radius: 50%;
    z-index: 2;
}

.timeline-content {
    background: var(--bg-surface);
    padding: 30px;
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-medium);
}

.timeline-content:hover {
    transform: translateX(5px);
    border-color: rgba(56, 189, 248, 0.3);
}

.timeline-content .date {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.timeline-content h3 {
    font-size: 1.4rem;
    margin-bottom: 5px;
}

.timeline-content .institution {
    color: var(--accent-secondary);
    font-weight: 500;
    margin-bottom: 15px;
}

.timeline-content .description {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* --- Projects Section --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background: var(--bg-surface);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-medium);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(129, 140, 248, 0.3);
}

.project-image {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
}

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

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 15, 25, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    opacity: 0;
    transition: var(--transition-medium);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-link {
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    transform: translateY(20px);
    transition: var(--transition-medium);
}

.project-card:hover .project-link {
    transform: translateY(0);
}

.project-link:hover {
    background: #fff;
    color: var(--bg-main);
}

.project-info {
    padding: 30px;
}

.project-info h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

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

.project-tech span {
    font-size: 0.8rem;
    color: var(--accent-primary);
    font-weight: 600;
}

/* --- Contact Section --- */
.contact-container {
    display: flex;
    gap: 50px;
    max-width: 1100px;
    margin: 0 auto;
    background: var(--bg-surface);
    padding: 50px;
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-info {
    flex: 1;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.method {
    display: flex;
    align-items: center;
    gap: 15px;
}

.method i {
    width: 40px;
    height: 40px;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-primary);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.1rem;
}

.contact-form {
    flex: 1;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    background: var(--bg-main);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

/* --- Footer --- */
footer {
    background: var(--bg-surface);
    padding: 50px 5%;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
}

.footer-logo span {
    color: var(--accent-primary);
}

.footer-socials {
    display: flex;
    gap: 20px;
}

.footer-socials a {
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.footer-socials a:hover {
    color: var(--accent-primary);
    transform: translateY(-3px);
}

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

/* --- Responsive Design --- */
@media (max-width: 992px) {
    .hero {
        flex-direction: column;
        text-align: center;
        justify-content: center;
        gap: 50px;
        padding-top: 120px;
    }
    
    .hero-content {
        align-items: center;
        display: flex;
        flex-direction: column;
    }
    
    .name {
        font-size: 3.5rem;
    }
    
    .hero-image {
        justify-content: center;
    }
    
    .image-wrapper {
        width: 300px;
        height: 300px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-stats {
        grid-template-columns: 1fr 1fr;
        width: 100%;
    }
    
    .contact-container {
        flex-direction: column;
        padding: 30px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* In a full build, we'd add JS for a mobile menu toggle */
    }
    
    .menu-toggle {
        display: block;
    }
    
    .name {
        font-size: 2.8rem;
    }
    
    .role {
        font-size: 1.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
}

/* Animation Classes for JS Intersection Observer */
.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);
}