:root {
    --primary-color: #3b82f6;
    --primary-glow: rgba(59, 130, 246, 0.5);
    --secondary-color: #8b5cf6;
    --accent-color: #10b981;
    --bg-dark: #0a0a0b;
    --bg-card: #161618;
    --bg-navbar: rgba(10, 10, 11, 0.8);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --container-width: 1100px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 100px 0;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 15px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 0 auto;
    border-radius: 2px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 0.8rem 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    padding: 0.6rem 0;
    background: var(--bg-navbar);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-main);
}

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

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

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

.nav-cta {
    background: var(--glass-bg);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
    color: var(--text-main) !important;
}

.nav-cta:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 20px var(--primary-glow);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(-45deg, #020617, #0f172a, #111827, #020617);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    text-align: center;
    overflow: hidden;
}

/* Abstract Tech Grid Overlay */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(circle at center, black 40%, transparent 100%);
    -webkit-mask-image: radial-gradient(circle at center, black 40%, transparent 100%);
    z-index: 0;
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: 0 2rem;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 5px;
    margin-bottom: 1.5rem;
    font-weight: 600;
    opacity: 0.9;
}

.hero-title {
    font-size: clamp(3.5rem, 10vw, 6.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -3px;
    background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-inline: auto;
    line-height: 1.8;
}

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

.hero-description span {
    color: var(--primary-color);
    font-weight: 600;
    position: relative;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1.1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-block;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: 0 4px 30px rgba(59, 130, 246, 0.4);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-main);
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.mouse {
    width: 28px;
    height: 48px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 4px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        transform: translate(-50%, 0);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, 20px);
        opacity: 0;
    }
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 4rem;
    align-items: start;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-img-wrapper {
    position: relative;
    width: 280px;
    height: 320px;
    border-radius: 24px;
    padding: 8px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 10px 40px rgba(59, 130, 246, 0.3);
    transition: var(--transition);
}

.profile-img-wrapper:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 50px rgba(59, 130, 246, 0.5);
}

.profile-img {
    width: 100%;
    height: 100%;
    border-radius: 20px;
    object-fit: cover;
    border: 4px solid var(--bg-dark);
}

.about-content {
    flex: 1;
}

.about-text p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.about-info {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-item {
    display: flex;
    gap: 1rem;
}

.info-label {
    color: var(--primary-color);
    font-weight: 600;
    min-width: 120px;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    text-align: center;
}

.stat-card h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Research Section */
.research-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.research-item {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    transition: var(--transition);
}

.research-item:hover {
    border-color: var(--primary-color);
    transform: translateX(10px);
}

.research-icon {
    width: 60px;
    height: 60px;
    background: var(--glass-bg);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.research-title {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
}

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

.research-tag {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Projects Section */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    overflow: hidden;
    transition: var(--transition);
}

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

.project-img {
    height: 200px;
    background: linear-gradient(135deg, #1e293b, #0f172a);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--primary-color);
}

.project-info {
    padding: 2rem;
}

.project-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.project-info p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.project-tags span {
    font-size: 0.75rem;
    background: var(--glass-bg);
    padding: 0.4rem 0.8rem;
    border-radius: 50px;
    color: var(--primary-color);
    font-weight: 600;
}

.project-links a {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* Skills Section */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.skill-category {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    border-left: 3px solid var(--primary-color);
    padding-left: 1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-tags span {
    background: var(--glass-bg);
    padding: 0.6rem 1.2rem;
    border-radius: 12px;
    font-size: 0.9rem;
    border: 1px solid var(--glass-border);
    transition: var(--transition);
}

.skill-tags span:hover {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: var(--glass-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary-color);
}

.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.contact-item p {
    color: var(--text-muted);
}

.social-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 3rem;
}

.social-links a {
    width: 50px;
    height: 50px;
    background: var(--glass-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-muted);
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
}

/* Footer */
footer {
    padding: 50px 0;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

footer p {
    color: var(--text-muted);
}

.footer-note {
    font-size: 0.8rem;
    margin-top: 0.5rem;
    opacity: 0.6;
}

/* Animations */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease, transform 1s ease;
}

.animate-up.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.2s;
}

.delay-2 {
    transition-delay: 0.4s;
}

.delay-3 {
    transition-delay: 0.6s;
}

/* Mobile Responsive */
@media (max-width: 991px) {

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: block;
        cursor: pointer;
    }

    .nav-toggle span {
        display: block;
        width: 25px;
        height: 2px;
        background: var(--text-main);
        margin: 5px 0;
        transition: var(--transition);
    }
}