:root {
    --primary: #00f2fe;
    --primary-glow: rgba(0, 242, 254, 0.4);
    --secondary: #4facfe;
    --bg-color: #0a0a0a;
    --surface: #141414;
    --surface-light: rgba(255, 255, 255, 0.03);
    --surface-border: rgba(255, 255, 255, 0.08);
    --text-main: #ffffff;
    --text-muted: #9ca3af;
    --text-dark: #cbd5e1;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
    font-family: 'Outfit', sans-serif;
}

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

/* Background Blobs */
.blob-bg {
    position: fixed;
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    border-radius: 50%;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    filter: blur(80px);
    z-index: -1;
    opacity: 0.5;
    animation: float 10s infinite ease-in-out alternate;
}

.blob-2 {
    top: 50%;
    left: 70%;
    background: radial-gradient(circle, rgba(79, 172, 254, 0.3) 0%, transparent 70%);
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(10%, 10%) scale(1.1); }
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--surface-border);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: 1px;
}

.dot {
    color: var(--primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links li a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
}

.nav-links li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: var(--transition);
}

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

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

/* Mobile Menu */
.burger {
    display: none;
    cursor: pointer;
}
.burger div {
    width: 25px;
    height: 2px;
    background-color: var(--text-main);
    margin: 5px;
    transition: var(--transition);
}

/* Typography & General */
.section-padding {
    padding: 6rem 2rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 3rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.text-primary {
    color: var(--primary);
}

/* Base Buttons */
.btn {
    padding: 0.8rem 2rem;
    border-radius: 30px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #000;
    box-shadow: 0 4px 15px var(--primary-glow);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--surface-border);
    backdrop-filter: blur(10px);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
    transform: translateY(-3px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 2rem;
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    z-index: 10;
}

.greeting {
    font-size: 1.2rem;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.name {
    font-size: 5rem;
    font-weight: 800;
    line-height: 1.1;
    margin: 1rem 0;
    background: linear-gradient(to right, #fff, #9ca3af);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.role {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.typing-text {
    font-weight: 600;
    color: var(--primary);
}

.cursor {
    display: inline-block;
    width: 3px;
    background-color: var(--primary);
    animation: blink 1s step-end infinite;
}

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

.summary {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 500px;
    margin-bottom: 2.5rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

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

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

.social-links a:hover {
    color: var(--primary);
    transform: translateY(-3px) scale(1.1);
}

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

.image-wrapper {
    position: relative;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    padding: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    z-index: 2;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 6px solid var(--bg-color);
    position: relative;
    z-index: 2;
}
.img-glow {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: inherit;
    border-radius: inherit;
    filter: blur(30px);
    z-index: 1;
    opacity: 0.6;
    animation: pulse 4s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(1.05); opacity: 0.8; }
}

/* About & Education & Skills */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

h3 i {
    color: var(--primary);
    margin-right: 0.5rem;
}

.timeline {
    border-left: 2px solid var(--surface-border);
    padding-left: 2rem;
    margin-top: 2rem;
}

.timeline-item {
    position: relative;
    padding-bottom: 2.5rem;
}

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

.timeline-dot {
    position: absolute;
    left: -35px;
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-color);
    border: 3px solid var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

.timeline-date {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-item h4 {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
}

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

.tag {
    display: inline-block;
    padding: 0.2rem 0.8rem;
    background: var(--surface-light);
    border: 1px solid var(--primary);
    border-radius: 20px;
    color: var(--primary);
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

/* Skills */
.skills h3 {
    margin-bottom: 2rem;
}

.skill-category {
    margin-bottom: 2.5rem;
    background: var(--surface);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid var(--surface-border);
    transition: var(--transition);
}

.skill-category:hover {
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.skill-category h4 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tags span {
    background: var(--surface-light);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-size: 0.95rem;
    border: 1px solid var(--surface-border);
    transition: var(--transition);
    cursor: default;
}
.skill-tags span:hover {
    background: rgba(0, 242, 254, 0.1);
    border-color: var(--primary);
    color: var(--primary);
}

.cert-list {
    list-style: none;
}
.cert-list li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-muted);
}

/* Experience */
.main-timeline {
    border-left: none;
    padding-left: 0;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}
.main-timeline .timeline-item {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: 20px;
    padding: 2rem;
    display: flex;
    gap: 2rem;
    transition: var(--transition);
}
.main-timeline .timeline-item:hover {
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.timeline-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.1), rgba(79, 172, 254, 0.1));
    border: 1px solid var(--primary);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    color: var(--primary);
    flex-shrink: 0;
}
.timeline-content {
    flex: 1;
}
.timeline-content .date {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: inline-block;
}
.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.2rem;
}
.timeline-content h4 {
    color: var(--text-dark);
    font-weight: 400;
    margin-bottom: 1rem;
}
.timeline-content ul {
    list-style-position: inside;
    color: var(--text-muted);
}
.timeline-content ul li {
    margin-bottom: 0.5rem;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.project-card {
    height: 250px;
    perspective: 1000px;
}
.card-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}
.project-card:hover .card-inner {
    transform: rotateY(180deg);
}
.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 20px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    border: 1px solid var(--surface-border);
}
.card-front {
    background: var(--surface);
}
.card-back {
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.1), rgba(79, 172, 254, 0.1));
    transform: rotateY(180deg);
    border-color: var(--primary);
}
.project-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}
.card-front h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}
.card-front p {
    color: var(--text-muted);
}
.card-back ul {
    text-align: left;
    list-style: none;
    margin-top: 1rem;
}
.card-back ul li {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.2rem;
}
.card-back ul li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary);
}

.pub-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}
.pub-item {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 15px;
    border: 1px solid var(--surface-border);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: var(--transition);
}
.pub-item:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255,255,255,0.02);
}
.pub-item i {
    font-size: 2rem;
    color: var(--primary);
}
.pub-year {
    color: var(--primary);
    font-size: 0.85rem;
    display: block;
    margin-top: 0.5rem;
    font-weight: 600;
}

/* Contact */
.contact-card {
    background: var(--surface);
    padding: 4rem;
    border-radius: 30px;
    border: 1px solid var(--surface-border);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.contact-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.contact-card > p {
    color: var(--text-muted);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 3rem;
}
.contact-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}
.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 2rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid var(--surface-border);
    text-decoration: none;
    color: var(--text-main);
    transition: var(--transition);
    text-align: left;
}
.contact-item:hover {
    border-color: var(--primary);
    background: rgba(0, 242, 254, 0.05);
    transform: translateY(-5px);
}
.contact-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 242, 254, 0.1);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
}
.contact-item h5 {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.contact-item span {
    font-weight: 600;
    font-size: 1.1rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--surface-border);
    padding: 2rem;
    text-align: center;
    background: rgba(10, 10, 10, 0.8);
}
.footer-content p {
    color: var(--text-muted);
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* 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: 968px) {
    .hero {
        flex-direction: column-reverse;
        text-align: center;
        padding-top: 8rem;
    }
    .hero-content {
        align-items: center;
        display: flex;
        flex-direction: column;
    }
    .name {
        font-size: 3.5rem;
    }
    .about-content {
        grid-template-columns: 1fr;
    }
    .main-timeline .timeline-item {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        right: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(10, 10, 10, 0.95);
        backdrop-filter: blur(10px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
        border-bottom: 1px solid var(--surface-border);
    }
    .nav-links.nav-active {
        right: 0;
    }
    .burger {
        display: block;
    }
    .name { font-size: 2.8rem; }
    .role { font-size: 1.5rem; }
    .image-wrapper { width: 280px; height: 280px; }
    .contact-info { flex-direction: column; }
}

.toggle .line1 { transform: rotate(-45deg) translate(-5px, 6px); }
.toggle .line2 { opacity: 0; }
.toggle .line3 { transform: rotate(45deg) translate(-5px, -6px); }