/* ============================================
   PREMIUM ENGINEERING MINIMALISM
   Portfolio for Nikita Yechshchenko
   Inspired by Stripe, Vercel, Linear
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* ============================================
   CSS VARIABLES & DESIGN TOKENS
   ============================================ */

:root {
    /* Color Palette - Neutral Dark Mode */
    --color-background: #050505;
    --color-background-elevated: #0a0a0a;
    --color-background-card: #0f0f0f;
    --color-background-hover: #1a1a1a;

    --color-text-primary: #FFFFFF;
    --color-text-secondary: #A1A1AA;
    --color-text-tertiary: #71717A;

    --color-border: #27272A;
    --color-border-hover: #3F3F46;

    /* Accent Colors - Subtle Steel Blue */
    --color-accent-primary: #60A5FA;
    --color-accent-secondary: #34D399;
    --color-accent-dim: rgba(96, 165, 250, 0.1);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

    /* Font Sizes - Fluid Typography */
    --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.85rem + 0.2vw, 1rem);
    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1.05rem + 0.4vw, 1.375rem);
    --text-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.75rem);
    --text-2xl: clamp(1.75rem, 1.5rem + 1.25vw, 2.5rem);
    --text-3xl: clamp(2.25rem, 1.8rem + 2.25vw, 3.5rem);
    --text-4xl: clamp(2.75rem, 2rem + 3.75vw, 4.5rem);

    /* Spacing System - Generous whitespace */
    --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;
    --space-5xl: 12rem;

    /* Layout */
    --max-width: 1200px;
    --section-padding: clamp(5rem, 10vw, 10rem);

    /* Effects */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-background);
    color: var(--color-text-secondary);
    line-height: 1.7;
    font-size: var(--text-base);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Noise Texture Overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.015;
    pointer-events: none;
    z-index: 9999;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--text-4xl);
    font-weight: 800;
    letter-spacing: -0.04em;
}

h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    letter-spacing: -0.03em;
}

h3 {
    font-size: var(--text-2xl);
    font-weight: 600;
}

h4 {
    font-size: var(--text-xl);
    font-weight: 600;
}

p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.text-mono {
    font-family: var(--font-mono);
}

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

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

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

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-lg);
    }
}

section {
    padding: var(--section-padding) 0;
    position: relative;
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: transform var(--transition-base), background var(--transition-base);
}

.nav.scrolled {
    background: rgba(5, 5, 5, 0.95);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: color var(--transition-base);
}

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

.nav-links {
    display: flex;
    gap: var(--space-xl);
    list-style: none;
    align-items: center;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent-primary);
    transition: width var(--transition-base);
}

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

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

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
    border-radius: 2px;
}

@media (max-width: 768px) {
    .nav-container {
        padding: var(--space-md) var(--space-lg);
    }

    .nav-links {
        position: fixed;
        top: 65px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(5, 5, 5, 0.98);
        backdrop-filter: blur(12px);
        padding: var(--space-xl);
        gap: var(--space-lg);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        transition: transform var(--transition-base), opacity var(--transition-base);
        pointer-events: none;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

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

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.2;
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    padding: var(--space-3xl) 0;
}

@media (max-width: 968px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }
}

.hero-content {
    max-width: 650px;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-accent-primary);
    letter-spacing: 0.05em;
    margin-bottom: var(--space-lg);
    display: inline-block;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

.hero-title {
    margin-bottom: var(--space-xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

/* Hero Profile Card */
.hero-profile {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

.profile-card {
    background: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.profile-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
}

.hero-profile-image {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--border-radius-md);
    object-fit: cover;
    margin-bottom: var(--space-lg);
    border: 1px solid var(--color-border);
}

.profile-status {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-background-elevated);
    border-radius: var(--border-radius-sm);
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent-secondary);
    animation: pulse-indicator 2s ease-in-out infinite;
}

@keyframes pulse-indicator {

    0%,
    100% {
        opacity: 1;
        box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7);
    }

    50% {
        opacity: 0.8;
        box-shadow: 0 0 0 8px rgba(52, 211, 153, 0);
    }
}

.status-text {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--color-text-primary);
    color: var(--color-background);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--color-accent-primary);
    color: var(--color-text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-background-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

/* ============================================
   SECTION HEADERS
   ============================================ */

.section-header {
    margin-bottom: var(--space-4xl);
    max-width: 700px;
}

.section-label {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-accent-primary);
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
    display: block;
}

.section-title {
    margin-bottom: var(--space-lg);
}

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

/* ============================================
   PROFILE SECTION
   ============================================ */

.profile-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-4xl);
    align-items: start;
}

@media (max-width: 968px) {
    .profile-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }
}

.profile-image-wrapper {
    position: relative;
}

.profile-image {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    border-radius: var(--border-radius-lg);
    object-fit: cover;
    border: 1px solid var(--color-border);
}

.profile-content h3 {
    margin-bottom: var(--space-lg);
}

.profile-content p {
    margin-bottom: var(--space-lg);
    font-size: var(--text-lg);
}

.about-centered {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    margin-top: var(--space-3xl);
}

.about-text p {
    margin-bottom: var(--space-xl);
    font-size: var(--text-lg);
    line-height: 1.8;
}

.about-text strong {
    position: relative;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Code Showcase Floating Animation */
.code-showcase {
    background: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    max-width: 700px;
    margin: var(--space-4xl) auto;
    position: relative;
    transition: all var(--transition-base);
}

.code-showcase.floating {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {

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

    50% {
        transform: translateY(-10px);
    }
}

.code-showcase::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg,
            var(--color-electric-cobalt),
            var(--color-accent-secondary),
            var(--color-electric-cobalt),
            var(--color-accent-secondary));
    background-size: 300% 300%;
    border-radius: var(--border-radius-md);
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-base);
    animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {

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

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

.code-showcase:hover::before {
    opacity: 1;
}

.code-showcase:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 20px 40px rgba(13, 110, 253, 0.3);
}

/* Typing Animation Cursor */
.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--color-accent-primary);
    margin-left: 2px;
    animation: blink 1s infinite;
    vertical-align: text-bottom;
}

@keyframes blink {

    0%,
    49% {
        opacity: 1;
    }

    50%,
    100% {
        opacity: 0;
    }
}

/* Cat Emoji Animation */
.cat-emoji {
    position: absolute;
    bottom: 20px;
    right: 20px;
    font-size: 48px;
    opacity: 0;
    transform: scale(0) rotate(-45deg);
    transition: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.cat-emoji.show {
    opacity: 1;
    transform: scale(1) rotate(0deg);
    animation: bounce 0.8s ease-in-out;
}

@keyframes bounce {

    0%,
    100% {
        transform: scale(1) translateY(0) rotate(0deg);
    }

    25% {
        transform: scale(1.1) translateY(-10px) rotate(5deg);
    }

    50% {
        transform: scale(0.95) translateY(0) rotate(-5deg);
    }

    75% {
        transform: scale(1.05) translateY(-5px) rotate(3deg);
    }
}

.cat-emoji:hover {
    transform: scale(1.2) rotate(15deg);
    filter: drop-shadow(0 8px 16px rgba(96, 165, 250, 0.5));
}

/* ============================================
   TECH STACK GRID
   ============================================ */

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.tech-category {
    background: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: var(--space-2xl);
    transition: all var(--transition-base);
}

.tech-category:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.tech-category-title {
    font-size: var(--text-xl);
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
    font-weight: 600;
}

.tech-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.tech-item {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    padding-left: var(--space-lg);
    position: relative;
    transition: all var(--transition-base);
}

.tech-item::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent-primary);
    transition: transform var(--transition-fast);
}

.tech-item:hover {
    color: var(--color-text-primary);
    transform: translateX(4px);
}

/* ============================================
   TIMELINE
   ============================================ */

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

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-left: var(--space-3xl);
    padding-bottom: var(--space-4xl);
}

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

.timeline-marker {
    position: absolute;
    left: -6px;
    top: 6px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--color-accent-primary);
    box-shadow: 0 0 0 4px var(--color-background);
}

.timeline-label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-accent-primary);
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.timeline-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-sm);
}

.timeline-company {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

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

.timeline-highlights {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.timeline-highlights li {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    padding-left: var(--space-lg);
    position: relative;
}

.timeline-highlights li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-accent-secondary);
}

/* ============================================
   CODE SNIPPET
   ============================================ */

.code-showcase {
    background: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    max-width: 700px;
    margin: var(--space-3xl) 0;
}

.code-header {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-background-elevated);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-border-hover);
}

.code-title {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    margin-left: var(--space-sm);
}

.code-body {
    padding: var(--space-xl);
    overflow-x: auto;
}

.code-body pre {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin: 0;
}

.code-keyword {
    color: #C678DD;
}

.code-function {
    color: #61AFEF;
}

.code-string {
    color: #98C379;
}

.code-comment {
    color: var(--color-text-tertiary);
    font-style: italic;
}

/* ============================================
   INTERESTS GRID
   ============================================ */

.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.interest-card {
    background: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    text-align: center;
}

.interest-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.interest-icon {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-md);
}

.interest-title {
    font-size: var(--text-lg);
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.interest-description {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    max-width: 1000px;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }
}

.contact-info h3 {
    margin-bottom: var(--space-lg);
}

.contact-info p {
    margin-bottom: var(--space-2xl);
    font-size: var(--text-lg);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
    text-decoration: none;
}

.contact-method:hover {
    border-color: var(--color-accent-primary);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    font-size: var(--text-2xl);
    min-width: 40px;
    text-align: center;
}

.contact-details {
    flex: 1;
}

.contact-label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: var(--space-xs);
}

.contact-value {
    font-size: var(--text-base);
    color: var(--color-text-primary);
    font-weight: 500;
}

.social-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-secondary);
    font-size: var(--text-xl);
    text-decoration: none;
    transition: all var(--transition-base);
}

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

/* ============================================
   FOOTER
   ============================================ */

.footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0;
    text-align: center;
}

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

.footer-accent {
    color: var(--color-accent-primary);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Intersection Observer Animation Classes */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-24px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.reveal-left.in-view {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(24px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.reveal-right.in-view {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================
   SCROLL INDICATOR
   ============================================ */

.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-background-elevated);
    z-index: 9998;
}

.scroll-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    width: 0%;
    transition: width 0.1s ease-out;
}

/* ============================================
   MAGNETIC CURSOR
   ============================================ */

.magnetic {
    transition: transform 0.2s ease-out;
}

/* ============================================
   PYTHON LOOP ANIMATION
   ============================================ */

.python-loop-container {
    margin: var(--space-4xl) 0;
    display: flex;
    justify-content: center;
}

.code-animation {
    background: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    max-width: 700px;
    width: 100%;
    position: relative;
    transition: all var(--transition-base);
}

.code-animation:hover {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 1px var(--color-accent-primary);
}

.falling-code-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

/* ============================================
   SKILLS GRID
   ============================================ */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-4xl);
}

.skill-card {
    background: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: var(--space-2xl);
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-smooth);
}

.skill-card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.15), transparent 70%);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease-out, height 0.6s ease-out;
    pointer-events: none;
}

.skill-card:hover {
    border-color: var(--color-electric-cobalt);
    transform: translateY(-8px) rotateX(2deg);
    box-shadow:
        0 20px 40px -10px rgba(13, 110, 253, 0.4),
        0 0 0 1px rgba(96, 165, 250, 0.2);
}

.skill-card:hover::before {
    transform: scaleX(1);
}

.skill-card:hover::after {
    width: 300px;
    height: 300px;
}

/* Shimmer effect */
.skill-card:hover {
    animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% center;
    }

    100% {
        background-position: 200% center;
    }
}

.skill-icon {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-lg);
    line-height: 1;
    display: inline-block;
    transition: all var(--transition-smooth);
    filter: drop-shadow(0 0 0 transparent);
}

.skill-card:hover .skill-icon {
    transform: scale(1.2) rotateY(360deg);
    filter: drop-shadow(0 0 20px rgba(96, 165, 250, 0.6));
    animation: iconPulse 1.5s ease-in-out infinite;
}

@keyframes iconPulse {

    0%,
    100% {
        transform: scale(1.2) rotateY(360deg);
    }

    50% {
        transform: scale(1.3) rotateY(360deg);
    }
}

.skill-title {
    font-size: var(--text-xl);
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    font-weight: 600;
    transition: all var(--transition-base);
}

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

.skill-description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    transition: color var(--transition-base);
}

.skill-card:hover .skill-description {
    color: var(--color-text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-accent-primary);
    background: rgba(96, 165, 250, 0.1);
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid rgba(96, 165, 250, 0.2);
    border-radius: 4px;
    letter-spacing: 0.02em;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.tech-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.3), transparent);
    transition: left 0.5s ease;
}

.skill-card:hover .tech-tag {
    background: rgba(96, 165, 250, 0.2);
    border-color: var(--color-accent-primary);
    transform: translateY(-2px);
}

.skill-card:hover .tech-tag::before {
    left: 100%;
}

/* ============================================
   UTILITIES
   ============================================ */

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

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

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

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

.mb-xs {
    margin-bottom: var(--space-xs);
}

.mb-sm {
    margin-bottom: var(--space-sm);
}

.mb-md {
    margin-bottom: var(--space-md);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

.mb-xl {
    margin-bottom: var(--space-xl);
}

.mb-2xl {
    margin-bottom: var(--space-2xl);
}

.mt-xs {
    margin-top: var(--space-xs);
}

.mt-sm {
    margin-top: var(--space-sm);
}

.mt-md {
    margin-top: var(--space-md);
}

.mt-lg {
    margin-top: var(--space-lg);
}

.mt-xl {
    margin-top: var(--space-xl);
}

.mt-2xl {
    margin-top: var(--space-2xl);
}