:root {
    --color-bg: #ffffff;
    --color-text: #000000;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 3rem;
    --font-size-5xl: 4rem;
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --transition-fast: 100ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 350ms ease;
    --z-nav: 1000;
    --z-toast: 2000;
}

html.theme-dark body,
body.inverted {
    --color-bg: #000000;
    --color-text: #ffffff;
    --color-gray-100: #171717;
    --color-gray-200: #262626;
    --color-gray-300: #404040;
    --color-gray-400: #525252;
    --color-gray-500: #737373;
    --color-gray-600: #a3a3a3;
    --color-gray-700: #d4d4d4;
    --color-gray-800: #e5e5e5;
    --color-gray-900: #f5f5f5;
}

html.theme-dark .floating-nav,
body.inverted .floating-nav {
    background: #000000;
    border-color: #404040;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
    transition: background-color var(--transition-base), color var(--transition-base);
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-gray-300);
    z-index: 1001;
}

.scroll-progress::after {
    content: '';
    display: block;
    height: 100%;
    width: var(--scroll-pct, 0%);
    background: var(--color-text);
    transition: width 0.05s ease-out;
}

.floating-nav {
    position: fixed;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--color-bg);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-xl);
    z-index: var(--z-nav);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.nav-link {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-600);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-text);
    background: var(--color-gray-100);
}

.nav-link.active {
    color: var(--color-text);
    background: var(--color-gray-200);
}

.theme-toggle {
    margin-left: 0.5rem;
    padding: 0.5rem;
    background: transparent;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    color: var(--color-text);
    transition: all var(--transition-base);
}

.theme-toggle:hover,
.theme-toggle:focus {
    background: var(--color-gray-100);
}

.theme-toggle .theme-icon-moon {
    display: none;
}

.theme-toggle .theme-icon-sun {
    display: block;
}

body:not(.inverted) .theme-toggle .theme-icon-moon {
    display: block;
}

body:not(.inverted) .theme-toggle .theme-icon-sun {
    display: none;
}

@media (max-width: 768px) {
    .floating-nav {
        top: auto;
        bottom: 1.5rem;
        padding: 0.5rem 1rem;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.6) !important;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        isolation: isolate;
    }
    
    html.theme-dark .floating-nav,
    body.inverted .floating-nav {
        background: rgba(0, 0, 0, 0.6) !important;
    }
    
    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: var(--font-size-xs);
    }
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--color-bg);
}

.noise-overlay {
    position: absolute;
    inset: 0;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='2' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    pointer-events: none;
}

.moving-lines {
    position: absolute;
    inset: 0;
    overflow: hidden;
    opacity: 0.1;
}

.moving-lines .line {
    position: absolute;
    width: 1px;
    height: 100%;
    background: var(--color-text);
    will-change: transform;
}

.moving-lines .line:nth-child(1) { left: 10%; }
.moving-lines .line:nth-child(2) { left: 30%; }
.moving-lines .line:nth-child(3) { left: 50%; }
.moving-lines .line:nth-child(4) { left: 70%; }
.moving-lines .line:nth-child(5) { left: 90%; }

.hero-content {
    position: relative;
    text-align: center;
    padding: var(--spacing-md);
    max-width: 1200px;
    z-index: 1;
}

.glitch-wrapper {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1;
    position: relative;
    display: inline-block;
}

.hero-title::before,
.hero-title::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
}

.hero-title:hover::before {
    animation: glitch-1 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) both infinite;
    color: var(--color-text);
    z-index: -1;
}

.hero-title:hover::after {
    animation: glitch-2 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) reverse both infinite;
    color: var(--color-gray-400);
    z-index: -2;
}

@keyframes glitch-1 {
    0%, 100% {
        transform: translate(0);
        opacity: 0;
    }
    33% {
        transform: translate(-2px, 2px);
        opacity: 0.7;
    }
    66% {
        transform: translate(2px, -2px);
        opacity: 0.7;
    }
}

@keyframes glitch-2 {
    0%, 100% {
        transform: translate(0);
        opacity: 0;
    }
    33% {
        transform: translate(2px, -2px);
        opacity: 0.5;
    }
    66% {
        transform: translate(-2px, 2px);
        opacity: 0.5;
    }
}

.hero-tagline {
    font-size: clamp(1.25rem, 3vw, 2rem);
    font-weight: 400;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.typewriter {
    display: inline-block;
    border-right: 2px solid var(--color-text);
    padding-right: 0.5rem;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { border-color: transparent; }
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: var(--font-size-lg);
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    will-change: transform;
}

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

.btn-primary:hover,
.btn-primary:focus {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

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

.btn-secondary:hover,
.btn-secondary:focus {
    background: var(--color-text);
    color: var(--color-bg);
    transform: translateY(-2px);
}

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

.btn:hover .btn-arrow {
    transform: translateX(5px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 3rem;
    background: var(--color-gray-400);
    animation: scroll-down 1.2s ease-in-out infinite;
}

@keyframes scroll-down {
    0%, 100% {
        transform: translateY(0);
        opacity: 0;
    }
    50% {
        transform: translateY(20px);
        opacity: 1;
    }
}

.section {
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

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

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.subsection-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.links-section {
    background: var(--color-gray-100);
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.link-card {
    position: relative;
    padding: var(--spacing-md);
    background: var(--color-bg);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-base);
    overflow: hidden;
    will-change: transform;
}

.link-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-text);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 0;
}

.link-card:hover::before {
    opacity: 0.03;
}

.link-card:hover,
.link-card:focus {
    transform: translateY(-4px) scale(1.02);
    border-color: var(--color-text);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.link-card-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.link-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.link-info {
    flex: 1;
}

.link-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.link-description {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.link-actions {
    position: relative;
    z-index: 2;
    display: flex;
    gap: 0.5rem;
    margin-top: var(--spacing-sm);
    pointer-events: auto;
}
.link-card-content * {
    color: inherit !important;
    text-decoration: none !important;
}

.link-card-content:visited * {
    color: var(--color-text) !important;
}

.link-name {
    color: var(--color-text) !important;
}
a {
    color: inherit;
    text-decoration: none;
}
.visit-btn,
.copy-btn {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    color: var(--color-text);
    cursor: pointer;
    font-family: var(--font-family);
    text-decoration: none;
    display: inline-block;
}

.visit-btn:hover,
.visit-btn:focus,
.copy-btn:hover,
.copy-btn:focus {
    background: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.about-bio {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-md);
}

.skills-wrapper {
    padding: var(--spacing-md);
    background: var(--color-gray-100);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-chip {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    background: var(--color-bg);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.skill-chip:hover {
    background: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
    transform: translateY(-2px);
}

.timeline {
    padding: var(--spacing-md);
    background: var(--color-gray-100);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
}

.timeline-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.timeline-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-sm);
    padding-left: var(--spacing-sm);
}

.timeline-dot {
    width: 12px;
    height: 12px;
    background: var(--color-text);
    border-radius: 50%;
    margin-top: 0.5rem;
    position: relative;
}

.timeline-dot::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--color-gray-300);
}

.timeline-item:last-child .timeline-dot::before {
    display: none;
}

.timeline-content {
    padding-bottom: var(--spacing-sm);
}

.timeline-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.timeline-period {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: 0.5rem;
}

.timeline-description {
    font-size: var(--font-size-base);
    color: var(--color-gray-700);
    line-height: 1.6;
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.contact-section {
    background: var(--color-gray-100);
}

.contact-layout {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-layout .contact-form-wrapper {
    order: 2;
}

.contact-layout .contact-grid {
    order: 1;
}

@media (max-width: 767px) {
    .contact-layout .contact-grid {
        display: none;
    }
}

@media (min-width: 768px) {
    .contact-layout {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
        align-items: stretch;
    }
    .contact-layout .contact-form-wrapper {
        order: 1;
    }
    .contact-layout .contact-grid {
        order: 2;
    }
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .contact-layout .contact-grid {
        grid-template-columns: 1fr;
    }
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-bg);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-base);
}

.contact-card:hover,
.contact-card:focus {
    transform: translateY(-4px);
    border-color: var(--color-text);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.contact-info h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-info p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.contact-form-wrapper {
    padding: var(--spacing-md);
    background: var(--color-bg);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    max-width: 560px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
}

.form-input {
    padding: 0.75rem 1rem;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-bg);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input::placeholder {
    color: var(--color-gray-500);
}

.form-input:focus {
    border-color: var(--color-text);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.08);
}

body.inverted .form-input:focus {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
}

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

.btn-submit {
    margin-top: 0.5rem;
    cursor: pointer;
    border: none;
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.footer {
    padding-top: 20px;
    padding-bottom: 20px;
    text-align: center;
}

.footer-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 1rem 2rem;
    background: var(--color-text);
    color: var(--color-bg);
    border-radius: var(--radius-lg);
    font-weight: 500;
    z-index: var(--z-toast);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
    body {
        padding-bottom: 0;
    }
    
    .hero-content {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
    
    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .contact-layout .contact-grid {
        grid-template-columns: 1fr;
    }
    
    main {
        margin-bottom: 0;
    }
    
    .footer {
        position: static;
            padding-top: 20px;
            padding-bottom: 96px;
        background: var(--color-bg);
        z-index: auto;
        margin-bottom: 0;
    }
    
    .footer-text {
        font-size: var(--font-size-xs);
    }
    
    .toast {
        top: 2rem;
        bottom: auto;
        left: 50%;
        transform: translateX(-50%) translateY(-150px);
    }
    
    .toast.show {
        transform: translateX(-50%) translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .scroll-line,
    .typewriter {
        animation: none;
    }
    
    .hero-title:hover::before,
    .hero-title:hover::after {
        animation: none;
    }
}

*:focus {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--color-gray-500);
    outline-offset: 4px;
}

button:focus-visible,
a:focus-visible {
    outline-offset: 2px;
}

@media print {
    .floating-nav,
    .theme-toggle,
    .scroll-indicator,
    .scroll-progress,
    .moving-lines,
    .noise-overlay {
        display: none;
    }
}