/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Cyberpunk/Matrix inspired */
    --primary-bg: #0a0a0a;
    --secondary-bg: #111111;
    --accent-bg: #1a1a1a;
    --card-bg: #161616;
    
    --primary-text: #ffffff;
    --secondary-text: #b3b3b3;
    --muted-text: #666666;
    
    --accent-green: #00ff41;
    --accent-cyan: #00ffff;
    --accent-purple: #8b00ff;
    --accent-pink: #ff00ff;
    
    --border-color: #333333;
    --hover-bg: #252525;
    
    /* Typography */
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Light mode variables */
[data-theme="light"] {
    --primary-bg: #ffffff;
    --secondary-bg: #f8f9fa;
    --accent-bg: #f1f3f4;
    --card-bg: #ffffff;
    
    --primary-text: #1a1a1a;
    --secondary-text: #4a5568;
    --muted-text: #718096;
    
    --border-color: #e2e8f0;
    --hover-bg: #f7fafc;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--primary-bg);
    color: var(--primary-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo a {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-green);
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo a:hover {
    color: var(--accent-cyan);
    text-shadow: 0 0 10px currentColor;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

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

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

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

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

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--secondary-text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 70px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.hero-content {
    z-index: 2;
}

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

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

/* Glitch Effect */
.hero-title::before,
.hero-title::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-bg);
    color: var(--accent-green);
    opacity: 0;
    animation: glitch 3s infinite;
}

.hero-title::before {
    animation-delay: 0.1s;
    color: var(--accent-purple);
    transform: translateX(-2px);
}

.hero-title::after {
    animation-delay: 0.2s;
    color: var(--accent-pink);
    transform: translateX(2px);
}

@keyframes glitch {
    0%, 90%, 100% {
        opacity: 0;
    }
    91%, 99% {
        opacity: 1;
    }
}

.hero-tagline {
    font-size: 1.5rem;
    color: var(--secondary-text);
    margin-bottom: var(--spacing-md);
    font-weight: 300;
}

.highlight {
    color: var(--accent-green);
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--secondary-text);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition-fast);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--accent-green);
    color: var(--primary-bg);
}

.btn-primary:hover {
    background: transparent;
    color: var(--accent-green);
    border-color: var(--accent-green);
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

.btn-secondary:hover {
    background: var(--accent-cyan);
    color: var(--primary-bg);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

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

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

.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
}

/* Matrix Rain Animation */
.hero-visual {
    position: relative;
    height: 500px;
    overflow: hidden;
}

.matrix-rain {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.3;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent-green);
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Section Styles */
section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-text), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--secondary-text);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Projects Section */
.projects {
    background: var(--secondary-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-green), var(--accent-cyan));
    transform: scaleX(0);
    transition: var(--transition-normal);
}

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

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-green);
    box-shadow: 0 10px 30px rgba(0, 255, 65, 0.1);
}

.project-card.featured {
    border-color: var(--accent-green);
    box-shadow: 0 5px 20px rgba(0, 255, 65, 0.1);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.project-status {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 4px 8px;
    border-radius: 4px;
    background: var(--accent-green);
    color: var(--primary-bg);
    font-weight: 600;
}

.project-links {
    display: flex;
    gap: var(--spacing-sm);
}

.project-link {
    text-decoration: none;
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.project-link:hover {
    transform: scale(1.2);
}

.project-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-text);
}

.project-description {
    color: var(--secondary-text);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 4px 8px;
    background: var(--accent-bg);
    color: var(--accent-green);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

/* Playground Section */
.playground-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.demo-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.demo-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 5px 20px rgba(0, 255, 255, 0.1);
}

.demo-card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--accent-cyan);
    font-weight: 600;
}

.demo-container {
    background: var(--primary-bg);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.matrix-demo {
    width: 100%;
    height: 100px;
    position: relative;
    overflow: hidden;
    border-radius: 4px;
}

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

#glitch-input {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--primary-text);
    padding: var(--spacing-sm);
    border-radius: 4px;
    margin-bottom: var(--spacing-sm);
    width: 100%;
    font-family: var(--font-mono);
}

#glitch-input:focus {
    outline: none;
    border-color: var(--accent-green);
}

.glitch-output {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-green);
    text-align: center;
    animation: textGlitch 2s infinite;
}

@keyframes textGlitch {
    0%, 90%, 100% {
        text-shadow: none;
    }
    91%, 99% {
        text-shadow: 
            2px 0 var(--accent-purple),
            -2px 0 var(--accent-cyan);
    }
}

.palette-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    width: 100%;
}

.color-swatch {
    aspect-ratio: 1;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
}

.color-swatch:hover {
    transform: scale(1.1);
}

/* Matrix Waterfall Demo Card */
.matrix-waterfall-card {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(0, 255, 65, 0.05) 100%);
    border: 1px solid var(--accent-green);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.matrix-waterfall-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 
        0 10px 30px rgba(0, 255, 65, 0.2),
        0 0 20px rgba(0, 255, 255, 0.1);
    transform: translateY(-5px);
}

.matrix-waterfall-card h3 {
    color: var(--accent-cyan);
    font-weight: 600;
}

.matrix-preview {
    width: 100%;
    height: 120px;
    background: #000;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--accent-green);
}

.preview-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #001100 0%, #000 50%, #001100 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.preview-rain {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(90deg, transparent 0%, var(--accent-green) 2%, transparent 4%),
        linear-gradient(90deg, transparent 10%, var(--accent-green) 12%, transparent 14%),
        linear-gradient(90deg, transparent 20%, var(--accent-green) 22%, transparent 24%),
        linear-gradient(90deg, transparent 30%, var(--accent-green) 32%, transparent 34%),
        linear-gradient(90deg, transparent 40%, var(--accent-green) 42%, transparent 44%),
        linear-gradient(90deg, transparent 50%, var(--accent-green) 52%, transparent 54%),
        linear-gradient(90deg, transparent 60%, var(--accent-green) 62%, transparent 64%),
        linear-gradient(90deg, transparent 70%, var(--accent-green) 72%, transparent 74%),
        linear-gradient(90deg, transparent 80%, var(--accent-green) 82%, transparent 84%),
        linear-gradient(90deg, transparent 90%, var(--accent-green) 92%, transparent 94%);
    background-size: 20px 100%;
    opacity: 0.3;
    animation: matrixRain 2s linear infinite;
}

@keyframes matrixRain {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

.preview-text {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--accent-green);
    text-shadow: 0 0 10px var(--accent-green);
    z-index: 2;
    animation: pulse 2s infinite;
}

.preview-subtitle {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-cyan);
    opacity: 0.8;
    z-index: 2;
    margin-top: 5px;
}

.demo-actions {
    margin-top: var(--spacing-md);
}

.demo-btn-primary {
    background: linear-gradient(45deg, var(--accent-green), var(--accent-cyan));
    border: none;
    color: #000;
    padding: 12px 24px;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-weight: bold;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all var(--transition-normal);
    width: 100%;
}

.demo-btn-primary:hover {
    background: linear-gradient(45deg, var(--accent-cyan), var(--accent-green));
    box-shadow: 0 5px 15px rgba(0, 255, 65, 0.3);
    transform: translateY(-2px);
}

/* Pomodoro Timer Demo Card */
.pomodoro-card {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(255, 165, 0, 0.05) 100%);
    border: 1px solid #ff6b35;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.pomodoro-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 
        0 10px 30px rgba(255, 107, 53, 0.2),
        0 0 20px rgba(0, 255, 255, 0.1);
    transform: translateY(-5px);
}

.pomodoro-card h3 {
    color: #ff6b35;
    font-weight: 600;
}

.pomodoro-preview {
    width: 100%;
    height: 120px;
    background: #1a1a1a;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    border: 1px solid #ff6b35;
}

.timer-display {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.1) 0%, transparent 70%);
}

.timer-circle {
    width: 60px;
    height: 60px;
    border: 3px solid #ff6b35;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    animation: timerPulse 2s infinite;
}

@keyframes timerPulse {
    0%, 100% { 
        box-shadow: 0 0 5px rgba(255, 107, 53, 0.5);
    }
    50% { 
        box-shadow: 0 0 20px rgba(255, 107, 53, 0.8);
    }
}

.timer-text {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: bold;
    color: #ff6b35;
}

.timer-status {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: #ff6b35;
    opacity: 0.8;
}

/* FiveGuess Demo Card */
.fiveguess-card {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(138, 43, 226, 0.05) 100%);
    border: 1px solid var(--accent-purple);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.fiveguess-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 
        0 10px 30px rgba(138, 43, 226, 0.2),
        0 0 20px rgba(0, 255, 255, 0.1);
    transform: translateY(-5px);
}

.fiveguess-card h3 {
    color: var(--accent-purple);
    font-weight: 600;
}

.fiveguess-preview {
    width: 100%;
    height: 120px;
    background: #0a0a0a;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--accent-purple);
}

.game-board {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(45deg, rgba(138, 43, 226, 0.1) 0%, transparent 50%);
}

.word-row {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
}

.letter-box {
    width: 24px;
    height: 24px;
    border: 1px solid var(--accent-purple);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--primary-text);
    background: var(--secondary-bg);
}

.letter-box.correct {
    background: var(--accent-green);
    color: #000;
    border-color: var(--accent-green);
}

.letter-box.partial {
    background: #ffa500;
    color: #000;
    border-color: #ffa500;
}

.game-status {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent-purple);
    opacity: 0.8;
}

/* Tetris Demo Card */
.tetris-card {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(0, 191, 255, 0.05) 100%);
    border: 1px solid #00bfff;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.tetris-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 
        0 10px 30px rgba(0, 191, 255, 0.2),
        0 0 20px rgba(0, 255, 255, 0.1);
    transform: translateY(-5px);
}

.tetris-card h3 {
    color: #00bfff;
    font-weight: 600;
}

.tetris-preview {
    width: 100%;
    height: 120px;
    background: #000;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    border: 1px solid #00bfff;
}

.tetris-board {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 191, 255, 0.1) 0%, transparent 70%);
    position: relative;
}

.tetris-block {
    position: absolute;
    width: 16px;
    height: 16px;
    border: 1px solid #333;
}

.tetris-block.t-block {
    background: #800080;
    top: 30%;
    left: 40%;
    box-shadow: 0 0 5px rgba(128, 0, 128, 0.5);
}

.tetris-block.i-block {
    background: #00bfff;
    top: 45%;
    left: 50%;
    box-shadow: 0 0 5px rgba(0, 191, 255, 0.5);
}

.tetris-block.l-block {
    background: #ffa500;
    top: 60%;
    left: 35%;
    box-shadow: 0 0 5px rgba(255, 165, 0, 0.5);
}

/* About Section */
.about {
    background: var(--secondary-bg);
}

.about-intro {
    font-size: 1.2rem;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: var(--secondary-text);
}

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

.tech-interests {
    margin-top: var(--spacing-xl);
}

.tech-interests h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--accent-green);
    text-align: center;
}

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

.tech-category {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.tech-category h4 {
    margin-bottom: var(--spacing-md);
    color: var(--accent-cyan);
    font-size: 1.1rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tech-tags span {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 4px 8px;
    background: var(--accent-bg);
    color: var(--secondary-text);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

/* Contact Section */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* New Contact Tiles Implementation */
.contact-wrap {
    max-width: 64rem;
    margin: 0 auto;
    padding: 3rem 1rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.tiles {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .tiles {
        grid-template-columns: repeat(3, 1fr);
    }
}

.tile {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid rgba(16, 185, 129, 0.4);
    background: rgba(24, 24, 27, 0.6);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.tile:hover,
.tile:focus {
    border-color: rgb(16, 185, 129);
    outline: none;
    transform: translateY(-2px);
}

.tile:focus-visible {
    box-shadow: 0 0 0 2px rgb(16, 185, 129);
}

.icon {
    display: inline-flex;
    color: var(--accent-green);
}

.title {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--primary-text);
    margin-bottom: 0.25rem;
}

.sub {
    font-size: 0.9rem;
    color: #d4d4d8;
}

/* Contact Tiles Layout - Legacy Support */
.contact-tiles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.contact-tile {
    position: relative;
    height: 100%;
}

.contact-tile-link {
    display: block;
    height: 100%;
    padding: var(--spacing-lg);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    color: var(--primary-text);
    transition: var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-height: 180px;
}

.contact-tile-link:hover {
    border-color: var(--accent-green);
    background: var(--hover-bg);
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 255, 65, 0.1);
}

.contact-tile-icon {
    margin-bottom: var(--spacing-md);
    color: var(--accent-green);
    transition: var(--transition-fast);
}

.contact-tile-icon svg {
    width: 32px;
    height: 32px;
    stroke: currentColor;
    fill: currentColor;
}

/* Brand-specific icon colors */
.linkedin-icon {
    color: #0077b5;
}

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

.contact-tile-link:hover .contact-tile-icon {
    transform: scale(1.1);
}

.contact-tile-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-tile-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-text);
}

.contact-tile-subtitle {
    font-size: 0.9rem;
    color: var(--accent-green);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.contact-tile-description {
    font-size: 0.85rem;
    color: var(--secondary-text);
    line-height: 1.4;
    margin: 0;
}

/* Legacy contact styles for backwards compatibility */
.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.contact-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    color: var(--primary-text);
    transition: var(--transition-fast);
}

.contact-link:hover {
    border-color: var(--accent-green);
    background: var(--hover-bg);
    transform: translateY(-2px);
}

.contact-icon {
    font-size: 1.2rem;
}

.contact-note {
    background: var(--accent-bg);
    padding: var(--spacing-md);
    border-radius: 8px;
    border-left: 4px solid var(--accent-green);
}

.contact-note p {
    color: var(--secondary-text);
    margin: 0;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: var(--primary-bg);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer p {
    color: var(--muted-text);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-xl);
        transition: var(--transition-normal);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.2rem;
        padding: var(--spacing-md) 0;
        width: 100%;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .hero-visual {
        height: 300px;
        order: -1;
    }
    
    .projects-grid,
    .playground-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        align-items: stretch;
    }
    
    .contact-tiles {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .contact-tile-link {
        min-height: 160px;
        padding: var(--spacing-md);
    }
    
    .contact-tile-icon svg {
        width: 28px;
        height: 28px;
    }
    
    .tech-categories {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .project-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
    
    .demo-container {
        min-height: 100px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .project-card,
    .demo-card {
        padding: var(--spacing-md);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scroll-indicator {
        animation: none;
    }
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--accent-green);
    outline-offset: 2px;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--primary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-green);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-cyan);
}