/* ===== CSS VARIABLES ===== */
:root {
    --primary-color: #00d9ff;
    --secondary-color: #0099cc;
    --accent-color: #7c3aed;
    --bg-dark: #0a0e1a;
    --bg-darker: #050810;
    --bg-light: #1a1f35;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --border-color: #2d3748;
    --success-color: #10b981;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #00d9ff 0%, #0099cc 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s ease;
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

section {
    padding: 5rem 0;
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    animation: fadeInUp 1s ease;
}

.greeting {
    display: block;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.name {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    min-height: 60px;
}

.typing-text {
    border-right: 3px solid var(--primary-color);
    padding-right: 5px;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-bottom: 2rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-2);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(0, 217, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 217, 255, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--bg-dark);
}

.hero-image {
    animation: fadeInUp 1s ease 0.2s both;
}

.image-wrapper {
    position: relative;
    width: 600px;
    height: 600px;
    margin: 0 auto;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
    position: relative;
    z-index: 2;
    box-shadow: 0 25px 80px rgba(0, 217, 255, 0.25), 0 10px 40px rgba(0, 0, 0, 0.6);
    transition: var(--transition);
}

.image-wrapper img:hover {
    transform: scale(1.02);
    box-shadow: 0 30px 100px rgba(0, 217, 255, 0.35), 0 15px 50px rgba(0, 0, 0, 0.7);
}

.image-border {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 4px solid transparent;
    background: var(--gradient-2);
    border-radius: 20px;
    z-index: 1;
    opacity: 0.6;
    animation: float 6s ease-in-out infinite;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-left: 2px solid var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    transform: rotate(-45deg);
    margin: 0 auto;
}

/* ===== SECTION STYLES ===== */
.section {
    position: relative;
}

.section:nth-child(even) {
    background: var(--bg-darker);
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-2);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

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

.about-text .lead {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.highlight {
    display: flex;
    gap: 1rem;
    align-items: start;
}

.highlight-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.highlight-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.highlight-content p {
    margin: 0;
    font-size: 0.95rem;
}

.info-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.info-card h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.expertise-list {
    list-style: none;
}

.expertise-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.expertise-list li:last-child {
    border-bottom: none;
}

.expertise-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.language {
    margin-bottom: 1.5rem;
}

.language span {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-dark);
    border-radius: 4px;
    overflow: hidden;
    margin: 0.5rem 0;
}

.progress {
    height: 100%;
    background: var(--gradient-2);
    transition: width 1s ease;
}

.level {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

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

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

.timeline-marker {
    position: absolute;
    left: -3.5rem;
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border: 4px solid var(--bg-dark);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--border-color);
}

.timeline-content {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.timeline-date {
    display: inline-block;
    padding: 0.25rem 1rem;
    background: var(--gradient-2);
    color: var(--text-primary);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.timeline-content h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.location {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.achievements h5 {
    color: var(--primary-color);
    margin: 1.5rem 0 1rem;
}

.achievements ul {
    list-style: none;
    padding-left: 0;
}

.achievements li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
}

.achievements li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* ===== PROJECTS SECTION ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.project-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.project-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.project-client {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-dark);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.75rem;
    border: 1px solid var(--border-color);
}

/* ===== SKILLS SECTION ===== */
.skills-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.skills-category {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.skills-category h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.skill-name {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.skill-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-dark);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-2);
    width: 0;
    transition: width 1.5s ease;
    border-radius: 4px;
}

.technologies {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.technologies h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
}

.tech-item {
    background: var(--bg-dark);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    color: var(--text-secondary);
}

.tech-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* ===== CERTIFICATIONS SECTION ===== */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.cert-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-align: center;
}

.cert-card:hover {
    transform: translateY(-5px);
    border-color: var(--success-color);
}

.cert-logo {
    width: 120px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    padding: 1rem;
    background: var(--bg-dark);
    border-radius: 12px;
}

.cert-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: brightness(0) invert(1);
    opacity: 0.9;
    transition: var(--transition);
}

.cert-card:hover .cert-logo img {
    opacity: 1;
    filter: brightness(0) invert(1) drop-shadow(0 0 8px var(--primary-color));
}

.cert-badge {
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--text-primary);
    margin: 0 auto 1.5rem;
}

.cert-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

.education-section {
    margin-top: 4rem;
}

.education-section h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    text-align: center;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.education-item {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.education-item:hover {
    border-color: var(--primary-color);
}

.education-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.education-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.institution {
    color: var(--primary-color);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.period {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== CONTACT SECTION ===== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.contact-item:hover {
    border-color: var(--primary-color);
}

.contact-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

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

.contact-links h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-link:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateX(5px);
}

.social-link svg {
    width: 24px;
    height: 24px;
}

.cta-box {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.cta-box h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.cta-box ul {
    list-style: none;
}

.cta-box li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
}

.cta-box li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-darker);
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    text-align: center;
}

.footer-content p {
    color: var(--text-secondary);
    margin: 0.5rem 0;
}

.footer-tagline {
    font-style: italic;
    font-size: 0.9rem;
}

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .image-wrapper {
        width: 450px;
        height: 450px;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-cta {
        justify-content: center;
    }

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

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

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        flex-direction: column;
        background: var(--bg-dark);
        padding: 2rem;
        transition: var(--transition);
        border-top: 1px solid var(--border-color);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .name {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .timeline {
        padding-left: 2rem;
    }

    .timeline-marker {
        left: -2.5rem;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1rem;
    }

    section {
        padding: 3rem 0;
    }

    .name {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

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

    .btn {
        width: 100%;
        text-align: center;
    }

    .image-wrapper {
        width: 350px;
        height: 350px;
    }

    .projects-grid,
    .skills-content,
    .certifications-grid,
    .education-grid {
        grid-template-columns: 1fr;
    }

    .tech-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
}

/* ===== UTILITY CLASSES ===== */
.text-center {
    text-align: center;
}

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

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

.mb-1 {
    margin-bottom: 1rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

.mt-1 {
    margin-top: 1rem;
}

.mt-2 {
    margin-top: 2rem;
}