:root {
    --bg-dark: #07070a;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --primary-color: #00f0ff;
    --secondary-color: #8a2be2;
    --glass-bg: rgba(20, 20, 24, 0.4);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(16px);
    --font-sans: 'Inter', sans-serif;
    --font-display: 'Outfit', sans-serif;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* --- Background Effects --- */
.background-effects {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -1;
    overflow: hidden;
    background: radial-gradient(circle at 50% 100%, #151522 0%, var(--bg-dark) 80%);
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 600px; height: 600px;
    background: var(--secondary-color);
    top: -200px; left: -100px;
}

.orb-2 {
    width: 500px; height: 500px;
    background: var(--primary-color);
    bottom: -100px; right: -100px;
    animation-delay: -5s;
}

.orb-3 {
    width: 400px; height: 400px;
    background: #0033ff;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.3;
    animation-delay: -10s;
}

.grid-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: linear-gradient(var(--glass-border) 1px, transparent 1px),
                      linear-gradient(90deg, var(--glass-border) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.2;
    mask-image: radial-gradient(circle at center, black, transparent 80%);
    -webkit-mask-image: radial-gradient(circle at center, black, transparent 80%);
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* --- Navigation --- */
nav {
    position: fixed;
    top: 0; width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition);
}

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

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

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

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

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.8rem;
    cursor: pointer;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(138, 43, 226, 0.5);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-outline {
    border: 1px solid var(--glass-border);
    padding: 0.6rem 1.4rem;
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* --- Utilities --- */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition);
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    line-height: 1.2;
}

.section {
    padding: 8rem 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

.section-header {
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* --- Hero Section --- */
.hero {
    padding-top: 120px;
    position: relative;
    min-height: 100vh;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    color: var(--primary-color);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.hero-title span {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    color: var(--text-primary);
    font-weight: 400;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 3rem auto;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    color: var(--text-secondary);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-20px) translateX(-50%); }
    60% { transform: translateY(-10px) translateX(-50%); }
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 3rem;
    align-items: center;
}

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

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

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

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

.stat-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

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

.timeline::before {
    content: '';
    position: absolute;
    top: 0; left: 15px;
    height: 100%;
    width: 2px;
    background: var(--glass-border);
}

.timeline-item {
    position: relative;
    padding-left: 50px;
    margin-bottom: 3rem;
}

.timeline-dot {
    position: absolute;
    top: 5px; left: 8px;
    height: 16px; width: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    box-shadow: 0 0 10px var(--primary-color);
}

.timeline-date {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
}

.timeline-content h4 {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1rem;
}

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

/* --- Education Section --- */
.edu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.column-title {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.column-title i {
    color: var(--secondary-color);
}

.edu-card, .cert-card {
    margin-bottom: 1.5rem;
}

.edu-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.edu-card .institution {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.3rem;
}

.edu-card .date, .edu-card .desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.cert-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.cert-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    background: rgba(0, 240, 255, 0.1);
    padding: 1rem;
    border-radius: 12px;
}

.cert-info h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

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

/* --- Projects Section --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

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

.project-card h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.project-card h3 i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.language-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    margin-top: auto;
}

.project-link:hover {
    color: white;
    gap: 0.8rem;
}

/* --- Contact Section --- */
.text-center {
    text-align: center;
}

.text-center .divider {
    margin: 0 auto;
}

.text-center .section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 1rem;
}

.contact-links {
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 500;
    transition: var(--transition);
}

.contact-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.contact-btn i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

/* --- Footer --- */
footer {
    border-top: 1px solid var(--glass-border);
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-content .location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

.fade-in {
    animation: fadeIn 1s cubic-bezier(0.5, 0, 0, 1) forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Responsive Design --- */
@media (max-width: 900px) {
    .about-grid, .edu-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 3rem;
    }
}

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

    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 2rem 0;
        transform: translateY(-150%);
        transition: var(--transition);
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .hero-actions {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
    }
}