:root {
    --color-bg: #0a0a0f;
    --color-bg-elevated: #12121a;
    --color-bg-glass: rgba(18, 18, 26, 0.7);
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-muted: rgba(255, 255, 255, 0.4);
    --color-accent: #7c3aed;
    --color-accent-light: #a78bfa;
    --color-accent-glow: rgba(124, 58, 237, 0.4);
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #3b82f6 100%);
    --gradient-text: linear-gradient(135deg, #a78bfa 0%, #60a5fa 100%);
    --gradient-bg: radial-gradient(ellipse at 50% 0%, rgba(124, 58, 237, 0.15) 0%, transparent 50%);
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --text-xs: clamp(0.75rem, 1.5vw, 0.875rem);
    --text-sm: clamp(0.875rem, 1.8vw, 1rem);
    --text-base: clamp(1rem, 2vw, 1.125rem);
    --text-lg: clamp(1.125rem, 2.5vw, 1.25rem);
    --text-xl: clamp(1.25rem, 3vw, 1.5rem);
    --text-2xl: clamp(1.5rem, 4vw, 2rem);
    --text-3xl: clamp(2rem, 5vw, 3rem);
    --text-4xl: clamp(2.5rem, 7vw, 4rem);
    --text-5xl: clamp(3rem, 10vw, 6rem);
    --text-hero: clamp(4rem, 15vw, 12rem);
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;
    --container-max: 1400px;
    --section-padding: clamp(4rem, 10vh, 8rem);
    --blur-sm: 8px;
    --blur-md: 16px;
    --blur-lg: 32px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 24px;
    --border-radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: none;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 100vh;
    background: var(--gradient-bg);
    pointer-events: none;
    z-index: -1;
}

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

.cursor {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 10000;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s, background 0.2s;
}

.cursor-follower {
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-accent-light);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s, border 0.3s;
    opacity: 0.5;
}

.cursor.hover {
    width: 16px;
    height: 16px;
    background: var(--color-accent-light);
}

.cursor-follower.hover {
    width: 60px;
    height: 60px;
    border-color: var(--color-accent);
    opacity: 0.3;
}

@media (pointer: coarse),
(max-width: 768px) {

    .cursor,
    .cursor-follower {
        display: none;
    }

    body {
        cursor: auto;
    }
}

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    transition: background var(--transition-base), backdrop-filter var(--transition-base);
}

.nav.scrolled {
    background: var(--color-bg-glass);
    backdrop-filter: blur(var(--blur-md));
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-logo a {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: 0.1em;
}

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

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.lang-selector {
    position: relative;
    margin-left: var(--space-md);
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-full);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    border-color: var(--color-accent);
}

.lang-toggle svg {
    transition: transform var(--transition-base);
}

.lang-dropdown.active+.lang-toggle svg,
.lang-selector:has(.lang-dropdown.active) .lang-toggle svg {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 150px;
    background: var(--color-bg-glass);
    backdrop-filter: blur(var(--blur-lg));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: 1000;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    width: 100%;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: var(--border-radius-sm);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-option:hover {
    background: rgba(124, 58, 237, 0.2);
    color: var(--color-text-primary);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

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

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

.nav-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
    cursor: pointer;
}

.nav-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: transform var(--transition-base);
}

.nav-menu-btn.active span:first-child {
    transform: rotate(45deg) translate(3px, 6px);
}

.nav-menu-btn.active span:last-child {
    transform: rotate(-45deg) translate(3px, -6px);
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--color-bg);
    z-index: 999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    transition: right var(--transition-smooth);
}

.mobile-menu.active {
    right: 0;
}

.mobile-link {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.4s ease, transform 0.4s ease, color var(--transition-fast);
}

.mobile-menu.active .mobile-link {
    opacity: 1;
    transform: translateX(0);
}

.mobile-menu.active .mobile-link:nth-child(1) {
    transition-delay: 0.1s;
}

.mobile-menu.active .mobile-link:nth-child(2) {
    transition-delay: 0.2s;
}

.mobile-menu.active .mobile-link:nth-child(3) {
    transition-delay: 0.3s;
}

.mobile-menu.active .mobile-link:nth-child(4) {
    transition-delay: 0.4s;
}

.mobile-link:hover {
    color: var(--color-accent);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-menu-btn {
        display: flex;
    }
}

.section-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--section-padding) var(--space-lg);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
}

.section-title.center {
    justify-content: center;
    text-align: center;
}

.title-number {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-accent);
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-accent);
    border-radius: var(--border-radius-full);
}

.title-text {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
}

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3xl);
    padding: var(--space-lg);
    width: 100%;
    max-width: var(--container-max);
}

.hero-text {
    text-align: center;
    z-index: 10;
}

.hero-greeting {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero-name {
    font-family: var(--font-display);
    font-size: var(--text-hero);
    font-weight: 700;
    letter-spacing: 0.05em;
    line-height: 1;
    margin-bottom: var(--space-md);
    color: #a78bfa;
    background: linear-gradient(90deg, #a78bfa 0%, #7c3aed 25%, #3b82f6 50%, #60a5fa 75%, #a78bfa 100%);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0;
    animation: heroNameReveal 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards, gradientFlow 4s ease-in-out 1.6s infinite;
}

.name-letter {
    display: inline-block;
}

.hero-title {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s ease 1s forwards;
}

.title-word {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.title-divider {
    color: var(--color-accent);
    font-weight: 300;
}

.hero-3d-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#hero-canvas {
    width: 100%;
    height: 100%;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    opacity: 0;
    animation: fadeIn 1s ease 1.5s forwards;
}

.scroll-indicator span {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

.about {
    position: relative;
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.about-intro {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: var(--space-lg);
}

.highlight {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--color-bg-glass);
    backdrop-filter: blur(var(--blur-md));
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
}

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

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

@media (max-width: 900px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-direction: row;
        justify-content: space-around;
    }
}

.experience {
    position: relative;
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-accent-light), transparent);
}

.timeline-item {
    position: relative;
    padding-left: var(--space-2xl);
    padding-bottom: var(--space-2xl);
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

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

.timeline-marker {
    position: absolute;
    left: -6px;
    top: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 2px solid var(--color-accent);
    transition: background var(--transition-base), transform var(--transition-base);
}

.timeline-item:hover .timeline-marker {
    background: var(--color-accent);
    transform: scale(1.2);
}

.timeline-content {
    padding: var(--space-lg);
    background: var(--color-bg-glass);
    backdrop-filter: blur(var(--blur-sm));
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    transition: border-color var(--transition-base), transform var(--transition-base);
}

.timeline-item:hover .timeline-content {
    border-color: rgba(124, 58, 237, 0.3);
    transform: translateX(8px);
}

.timeline-date {
    display: inline-block;
    font-size: var(--text-xs);
    color: var(--color-accent-light);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
}

.timeline-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.timeline-company {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.timeline-description {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tag {
    font-size: var(--text-xs);
    color: var(--color-accent-light);
    padding: 4px 12px;
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: var(--border-radius-full);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.tag:hover {
    background: rgba(124, 58, 237, 0.2);
    border-color: rgba(124, 58, 237, 0.4);
}

.timeline-item.education .timeline-marker {
    border-color: var(--color-accent-light);
}

.skills {
    position: relative;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.skill-card {
    padding: var(--space-xl);
    background: var(--color-bg-glass);
    backdrop-filter: blur(var(--blur-sm));
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
}

.skill-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.skill-card:hover {
    transform: translateY(-8px);
    border-color: rgba(124, 58, 237, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 40px var(--color-accent-glow);
}

.skill-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    transition: transform var(--transition-base);
}

.skill-card:hover .skill-icon {
    transform: scale(1.1);
}

.skill-icon svg {
    width: 100%;
    height: 100%;
}

.skill-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.skill-description {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: 1.7;
}

.contact {
    position: relative;
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-intro {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-xl);
}

.contact-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--gradient-primary);
    border-radius: var(--border-radius-full);
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    color: white;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.contact-cta:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px var(--color-accent-glow);
}

.cta-arrow {
    transition: transform var(--transition-base);
}

.contact-cta:hover .cta-arrow {
    transform: translateX(4px);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer {
    padding: var(--space-lg);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer p {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes letterFadeIn {
    from {
        opacity: 0;
        transform: translateY(50px) rotateX(-90deg);
    }

    to {
        opacity: 1;
        transform: translateY(0) rotateX(0);
    }
}

@keyframes heroNameReveal {
    0% {
        opacity: 0;
        transform: translateY(60px) scale(0.8);
        filter: blur(10px);
    }

    50% {
        filter: blur(2px);
    }

    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
        filter: blur(0);
    }
}

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

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

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

@keyframes scrollPulse {

    0%,
    100% {
        opacity: 1;
        transform: scaleY(1);
    }

    50% {
        opacity: 0.5;
        transform: scaleY(0.8);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .about-stats {
        flex-direction: column;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 8px;
    }

    .timeline-marker {
        left: 2px;
    }

    .timeline-item {
        padding-left: var(--space-xl);
    }
}

@media (max-width: 480px) {
    :root {
        --section-padding: clamp(3rem, 8vh, 5rem);
    }

    .nav {
        padding: var(--space-sm);
    }

    .section-title {
        flex-direction: column;
        align-items: flex-start;
    }

    .section-title.center {
        align-items: center;
    }
}