/* ===== CSS Variables ===== */
:root {
    --primary: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #e6f0ff;
    --secondary: #1a1a2e;
    --accent: #00d4aa;
    --text: #2d3748;
    --text-light: #718096;
    --text-dark: #1a202c;
    --bg: #ffffff;
    --bg-alt: #f7fafc;
    --bg-dark: #0f1624;
    --bg-dark-alt: #162033;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 0.75rem 0;
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    background: var(--primary);
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
}

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

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

.navbar:not(.scrolled) .nav-link {
    color: rgba(255, 255, 255, 0.8);
}

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

.navbar:not(.scrolled) .nav-link:hover,
.navbar:not(.scrolled) .nav-link.active {
    color: #fff;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
}

.navbar:not(.scrolled) .nav-toggle span {
    background: #fff;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, #0f1624 0%, #1a2a4a 50%, #0d2137 100%);
    overflow: hidden;
    padding: 2rem;
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-particles::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(0, 102, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(0, 212, 170, 0.08) 0%, transparent 40%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(1deg); }
    66% { transform: translate(-20px, 20px) rotate(-1deg); }
}

.hero-content {
    text-align: center;
    z-index: 2;
    max-width: 900px;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(0, 212, 170, 0.15);
    border: 1px solid rgba(0, 212, 170, 0.3);
    border-radius: 50px;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.6s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-description {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.6);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: #fff;
    display: inline;
}

.stat-suffix {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 0.25rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 0.6s ease 0.5s both;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 1px;
    height: 30px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.4), transparent);
}

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

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ===== Sections ===== */
.section {
    padding: 6rem 0;
}

.section-dark {
    background: var(--bg-dark);
    color: #fff;
}

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

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

.section-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.section-dark .section-tag {
    background: rgba(0, 102, 255, 0.15);
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--text-dark);
    letter-spacing: -0.02em;
}

.section-dark .section-title {
    color: #fff;
}

/* ===== About Section ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-content p {
    margin-bottom: 1.25rem;
    color: var(--text);
    font-size: 1.05rem;
}

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

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

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-alt);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
}

.highlight-item i {
    color: var(--primary);
    font-size: 1.1rem;
    margin-top: 0.2rem;
}

.highlight-item span {
    font-size: 0.95rem;
    color: var(--text);
}

.info-card {
    background: var(--bg-alt);
    border-radius: var(--radius);
    padding: 1.75rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

.info-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.info-list li {
    font-size: 0.95rem;
    color: var(--text);
}

.info-list li strong {
    color: var(--text-dark);
    min-width: 120px;
    display: inline-block;
}

.language-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.language-item span {
    font-size: 0.9rem;
    min-width: 90px;
    color: var(--text);
}

.language-bar {
    flex: 1;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.language-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 3px;
    transition: width 1s ease;
}

/* ===== Expertise Section ===== */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.expertise-card {
    background: var(--bg-dark-alt);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.expertise-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 102, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.expertise-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.1);
    border-radius: 12px;
    margin-bottom: 1.25rem;
}

.expertise-icon i {
    font-size: 1.25rem;
    color: var(--primary);
}

.expertise-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #fff;
}

.expertise-card p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tags span {
    padding: 0.3rem 0.75rem;
    background: rgba(0, 102, 255, 0.1);
    border: 1px solid rgba(0, 102, 255, 0.2);
    border-radius: 50px;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    font-family: 'JetBrains Mono', monospace;
}

/* ===== Timeline ===== */
.timeline {
    position: relative;
    padding-left: 3rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

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

.timeline-marker {
    position: absolute;
    left: -3rem;
    top: 0.5rem;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--bg);
    box-shadow: 0 0 0 3px var(--primary);
    transform: translateX(-6px);
}

.timeline-content {
    background: var(--bg-alt);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.timeline-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
}

.timeline-company {
    font-size: 0.95rem;
    color: var(--primary);
    font-weight: 500;
    margin-top: 0.25rem;
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
    background: var(--primary-light);
    padding: 0.3rem 0.75rem;
    border-radius: 50px;
    white-space: nowrap;
}

.timeline-body p {
    color: var(--text);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.timeline-body ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.timeline-body ul li {
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.9rem;
    color: var(--text);
    line-height: 1.6;
}

.timeline-body ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6rem;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
}

/* ===== Awards Section ===== */
.awards-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.award-card {
    background: var(--bg-dark-alt);
    border-radius: var(--radius);
    padding: 1.75rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.award-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.award-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.award-year {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
}

.award-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.award-card p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.5;
}

/* ===== Certifications ===== */
.certs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.cert-card {
    background: var(--bg-alt);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.cert-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 50%;
    margin: 0 auto 1.25rem;
}

.cert-icon i {
    font-size: 1.5rem;
    color: var(--primary);
}

.cert-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.cert-card p {
    font-size: 0.85rem;
    color: var(--text-light);
}

.education-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--bg-alt);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--border);
}

.education-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 50%;
    flex-shrink: 0;
}

.education-icon i {
    font-size: 1.5rem;
    color: var(--primary);
}

.education-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

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

/* ===== Contact Section ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-intro {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--bg-dark-alt);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.contact-item:hover {
    border-color: rgba(0, 102, 255, 0.3);
    transform: translateX(5px);
}

.contact-item i {
    color: var(--primary);
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.contact-item span {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--bg-dark-alt);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 0.95rem;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== Footer ===== */
.footer {
    background: #0a0f1a;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: #fff;
    background: var(--primary);
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 1rem;
}

.footer-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-links a:hover {
    background: var(--primary);
    color: #fff;
}

.footer-bottom {
    padding-top: 1.5rem;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .awards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .certs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
.address-item {
    align-items: flex-start;
}

.address-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.address-block strong {
    display: block;
    font-size: 15px;
    color: #ffffff;
    margin-bottom: 4px;
}

.address-block p {
    margin: 0;
    color: #cfcfcf;
    line-height: 1.6;
}

.address-divider {
    width: 100%;
    height: 1px;
    background: rgba(255,255,255,0.1);
}
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg);
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        gap: 1.5rem;
        transition: var(--transition);
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu .nav-link {
        color: var(--text) !important;
        font-size: 1.1rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .awards-grid {
        grid-template-columns: 1fr;
    }
    
    .certs-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline {
        padding-left: 2rem;
    }
    
    .timeline-marker {
        left: -2rem;
    }
    
    .timeline-header {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 4rem 0;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .timeline-content {
        padding: 1.5rem;
    }
}

/* ===== Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}