/* ==========================================
   CSS Variables & Theme Configuration
   ========================================== */
:root {
    /* Light Theme Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-primary-light: #3b82f6;
    --color-secondary: #64748b;
    --color-accent: #0ea5e9;
    
    --color-text: #1e293b;
    --color-text-light: #475569;
    --color-text-muted: #94a3b8;
    
    --color-background: #ffffff;
    --color-background-alt: #f8fafc;
    --color-background-elevated: #ffffff;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    --font-size-base: 16px;
    --font-size-small: 0.875rem;
    --font-size-large: 1.125rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --transition-speed: 0.3s;
    --transition-speed-slow: 0.5s;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* Dark Theme */
[data-theme="dark"] {
    --color-text: #f1f5f9;
    --color-text-light: #cbd5e1;
    --color-text-muted: #64748b;
    
    --color-background: #0f172a;
    --color-background-alt: #1e293b;
    --color-background-elevated: #334155;
    --color-border: #334155;
    --color-border-light: #475569;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

/* ==========================================
   Global Styles & Reset
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    overflow-x: hidden;
}

html {
    overflow-x: hidden;
}

/* ==========================================
   Typography
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--color-text);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--color-primary-dark);
}

/* ==========================================
   Layout & Container
   ========================================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-3xl) 0;
}

/* ==========================================
   Theme Toggle Button
   ========================================== */
.theme-toggle {
    position: fixed;
    top: 100px;
    right: var(--spacing-lg);
    z-index: 999;
    background: var(--color-background-elevated);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-speed);
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    color: var(--color-text);
    transition: all var(--transition-speed);
}

.sun-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

.moon-icon {
    display: block;
}

/* ==========================================
   Navigation
   ========================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-speed);
}

[data-theme="dark"] .nav {
    background-color: rgba(15, 23, 42, 0.8);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-speed);
    padding: 4px;
}

.nav-logo-image {
    width: 0;
    height: 0;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-primary);
    opacity: 0;
    transition: all var(--transition-speed);
}

.nav-logo-text {
    font-size: 0;
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    white-space: nowrap;
    opacity: 0;
    transition: all var(--transition-speed);
}

/* Show logo when scrolled */
.nav.scrolled .nav-logo-image {
    width: 40px;
    height: 40px;
    opacity: 1;
}

.nav.scrolled .nav-logo-text {
    font-size: 1.125rem;
    opacity: 1;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-small);
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-speed);
}

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

.btn-nav {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-primary);
    color: white;
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-speed);
}

.btn-nav:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-text);
    transition: all var(--transition-speed);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-background-alt) 100%);
}

/* Presentation Background Image */
.hero-bg-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity var(--transition-speed-slow);
    z-index: 0;
}

.hero-bg-image:not([style*="background-image: url"]) {
    display: none;
}

.hero-bg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 250, 252, 0.90) 100%);
    z-index: 1;
}

[data-theme="dark"] .hero-bg-overlay {
    background: linear-gradient(135deg, 
        rgba(15, 23, 42, 0.95) 0%, 
        rgba(30, 41, 59, 0.90) 100%);
}

/* Show background when image is loaded */
.hero-bg-image[style*="background-image: url"] {
    opacity: 0.15;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-image-wrapper {
    width: 180px;
    height: 180px;
    margin: 0 auto var(--spacing-lg);
    position: relative;
}

.hero-image-wrapper::before {
    content: '';
    position: absolute;
    inset: -8px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 50%;
    opacity: 0.3;
    filter: blur(20px);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.05); }
}

.hero-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--color-background);
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.hero-greeting,
.hero-name-wrapper {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.wave {
    display: inline-block;
    animation: wave 1.5s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(20deg); }
    75% { transform: rotate(-20deg); }
}

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

.cursor {
    color: var(--color-primary);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-tagline {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    font-weight: var(--font-weight-regular);
    font-style: italic;
    margin: var(--spacing-xs) 0 var(--spacing-md) 0;
    opacity: 0.9;
}

.hero-role {
    font-size: var(--font-size-large);
    color: var(--color-secondary);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: var(--font-size-large);
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

/* Hero Stats */
/* Code Block */
.code-block {
    background: var(--color-background-elevated);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    margin: var(--spacing-xl) 0;
    overflow: hidden;
    text-align: left;
    border: 1px solid var(--color-border);
    max-width: 100%;
}

.code-header {
    background: var(--color-background-alt);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--color-border);
}

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

.code-dot:nth-child(1) { background: #ef4444; }
.code-dot:nth-child(2) { background: #f59e0b; }
.code-dot:nth-child(3) { background: #10b981; }

.code-file {
    margin-left: auto;
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.code-content {
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    overflow-x: auto;
    max-width: 100%;
    word-wrap: break-word;
}

.code-content code {
    color: var(--color-text);
}

.code-comment { color: #6b7280; font-style: italic; }
.code-keyword { color: #8b5cf6; font-weight: 600; }
.code-variable { color: #3b82f6; }
.code-property { color: #06b6d4; }
.code-string { color: #10b981; }

[data-theme="dark"] .code-comment { color: #9ca3af; }
[data-theme="dark"] .code-keyword { color: #a78bfa; }
[data-theme="dark"] .code-variable { color: #60a5fa; }
[data-theme="dark"] .code-property { color: #22d3ee; }
[data-theme="dark"] .code-string { color: #34d399; }

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin: var(--spacing-xl) 0;
}

/* Social Links */
.social-links {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.social-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-background-elevated);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text);
    transition: all var(--transition-speed);
}

.social-icon:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed);
    border: 2px solid transparent;
    text-decoration: none;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff !important;
    border: none;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    color: #ffffff !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ==========================================
   Section Styles
   ========================================== */
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    position: relative;
    font-size: 2.5rem;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    font-size: var(--font-size-large);
    color: var(--color-text-light);
}


/* ==========================================
   About Section
   ========================================== */
.about {
    background: var(--color-background);
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about-main {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.about-main .lead-text {
    font-size: 1.2rem;
    line-height: 1.7;
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.highlight-name {
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

.about-main p {
    font-size: var(--font-size-large);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

/* About Image Container with Gradient */
.about-image-container {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    height: 500px;
}

.about-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 65% center; /* Move subject to center-right */
}

/* Location badge in About section */
.about-location {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: var(--spacing-md);
    padding: 14px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    transition: all var(--transition-speed);
    width: fit-content;
}

.about-location:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.location-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.about-location span {
    line-height: 1.2;
    white-space: nowrap;
}

/* ==========================================
   Expertise Section
   ========================================== */
.expertise {
    background-color: var(--color-background-alt);
}

/* Clean Horizontal Grid Layout */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

/* Card Base Styles - Simple Single Color */
.expertise-card {
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all var(--transition-speed);
    border: 1px solid var(--color-border-light);
}

.expertise-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Icon */
.expertise-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto var(--spacing-sm);
    transition: transform var(--transition-speed);
}

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

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

/* Heading */
.expertise-card h3 {
    font-size: 1.05rem;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

/* Caption */
.expertise-card p {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-text-light);
    margin: 0;
}

/* Light Solid Backgrounds with Colored Icons */
.card-platform {
    background: #eff6ff;
}

.card-platform .expertise-icon svg {
    color: #2563eb;
}

.card-distributed {
    background: #f0f9ff;
}

.card-distributed .expertise-icon svg {
    color: #0284c7;
}

.card-legacy {
    background: #f0fdf4;
}

.card-legacy .expertise-icon svg {
    color: #059669;
}

.card-ai {
    background: #faf5ff;
}

.card-ai .expertise-icon svg {
    color: #7c3aed;
}

/* Dark Theme */
[data-theme="dark"] .card-platform {
    background: rgba(37, 99, 235, 0.15);
}

[data-theme="dark"] .card-platform .expertise-icon svg {
    color: #60a5fa;
}

[data-theme="dark"] .card-distributed {
    background: rgba(2, 132, 199, 0.15);
}

[data-theme="dark"] .card-distributed .expertise-icon svg {
    color: #38bdf8;
}

[data-theme="dark"] .card-legacy {
    background: rgba(5, 150, 105, 0.15);
}

[data-theme="dark"] .card-legacy .expertise-icon svg {
    color: #34d399;
}

[data-theme="dark"] .card-ai {
    background: rgba(124, 58, 237, 0.15);
}

[data-theme="dark"] .card-ai .expertise-icon svg {
    color: #a78bfa;
}

/* Tablet: 2 columns */
@media (max-width: 1024px) {
    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile: 2 columns */
@media (max-width: 768px) {
    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .expertise-card {
        padding: var(--spacing-md);
    }

    .expertise-icon {
        width: 42px;
        height: 42px;
        margin-bottom: var(--spacing-sm);
    }

    .expertise-card h3 {
        font-size: 1.05rem;
        margin-bottom: var(--spacing-sm);
    }

    .expertise-card p {
        font-size: 0.85rem;
        line-height: 1.5;
    }
}

.expertise-card {
    padding: var(--spacing-lg);
    background-color: var(--color-background-elevated);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
}

/* Decorative mesh pattern background */
.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 180px;
    height: 180px;
    background: 
        linear-gradient(135deg, transparent 0%, transparent 48%, rgba(37, 99, 235, 0.03) 50%, transparent 52%, transparent 100%),
        linear-gradient(45deg, transparent 0%, transparent 48%, rgba(37, 99, 235, 0.03) 50%, transparent 52%, transparent 100%);
    background-size: 16px 16px;
    pointer-events: none;
    border-radius: 0 var(--border-radius) 0 0;
}

.expertise-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-speed);
}

.expertise-card:hover::after {
    transform: scaleX(1);
}

.expertise-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

/* Expertise Icon Styles */
.expertise-icon {
    width: 52px;
    height: 52px;
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-speed);
}

.expertise-icon svg {
    width: 100%;
    height: 100%;
    color: var(--color-primary);
    transition: all var(--transition-speed);
}

.expertise-card:hover .expertise-icon {
    transform: scale(1.1) translateY(-4px);
}

.expertise-card:hover .expertise-icon svg {
    filter: drop-shadow(0 4px 8px rgba(37, 99, 235, 0.3));
}


.expertise-card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    font-size: 1.25rem;
}

.expertise-card p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text-light);
    margin: 0;
}

/* ==========================================
   Tech Stack Section - Infinite Marquee
   ========================================== */
.tech-stack {
    background: var(--color-background);
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

.container-fluid {
    max-width: 100%;
    padding: 0 var(--spacing-md);
}

/* Marquee Container */
.tech-marquee-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
    width: 100%;
}

/* Individual Marquee Row */
.tech-marquee-row {
    width: 100%;
    overflow: hidden;
    position: relative;
    padding: 4px 0; /* Add padding to accommodate hover effects */
}

.tech-marquee-row::before,
.tech-marquee-row::after {
    content: '';
    position: absolute;
    top: 0;
    width: 100px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.tech-marquee-row::before {
    left: 0;
    background: linear-gradient(to right, var(--color-background), transparent);
}

.tech-marquee-row::after {
    right: 0;
    background: linear-gradient(to left, var(--color-background), transparent);
}

/* Marquee Animation */
.tech-marquee {
    display: flex;
    width: fit-content;
    animation: marquee-scroll 40s linear infinite;
}

.tech-marquee-row:hover .tech-marquee {
    animation-play-state: paused;
}

.tech-marquee-row.reverse .tech-marquee {
    animation: marquee-scroll-reverse 35s linear infinite;
}

.tech-marquee-track {
    display: flex;
    gap: var(--spacing-md);
    padding-right: var(--spacing-md);
}

@keyframes marquee-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@keyframes marquee-scroll-reverse {
    0% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(0);
    }
}

/* Tech Badge Styling */
.tech-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-background-elevated);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    white-space: nowrap;
    transition: all var(--transition-speed);
    flex-shrink: 0;
    margin: 2px 0; /* Add margin to accommodate hover transform */
}

.tech-badge:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
    background: var(--color-background);
}

.tech-badge img,
.tech-badge .tech-icon-custom {
    width: 32px;
    height: 32px;
    object-fit: contain;
    flex-shrink: 0;
}

.tech-icon-custom {
    color: var(--color-primary);
}

.tech-badge span {
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    line-height: 1;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .tech-stack {
        padding: var(--spacing-2xl) 0;
    }

    .tech-marquee {
        animation-duration: 25s !important;
    }

    .tech-marquee-row.reverse .tech-marquee {
        animation-duration: 20s !important;
    }

    .tech-badge {
        padding: 8px var(--spacing-md);
        gap: 8px;
    }

    .tech-badge img,
    .tech-badge .tech-icon-custom {
        width: 24px;
        height: 24px;
    }

    .tech-badge span {
        font-size: 0.75rem;
    }

    .tech-marquee-row::before,
    .tech-marquee-row::after {
        width: 40px;
    }
}

/* ==========================================
   Experience Section (Timeline)
   ========================================== */
.experience {
    background-color: var(--color-background-alt);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: var(--spacing-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-2xl);
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--spacing-xl) - 7px);
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--color-primary);
    border: 3px solid var(--color-background-alt);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.3);
}

.timeline-content {
    background-color: var(--color-background-elevated);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    margin-left: var(--spacing-md);
    transition: all var(--transition-speed);
}

.timeline-content:hover {
    box-shadow: var(--shadow-xl);
    transform: translateX(4px);
}

/* Experience Header with Logo */
.experience-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-bottom: 0;
}

.company-logo {
    max-width: 120px;
    height: auto;
    max-height: 50px;
    object-fit: contain;
    flex-shrink: 0;
    opacity: 0.9;
    transition: opacity var(--transition-speed);
}

.company-logo:hover {
    opacity: 1;
}

.experience-meta {
    flex: 1;
}

/* Experience Summary (Clean Text) */
.experience-summary {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-light);
    margin: var(--spacing-sm) 0;
}

/* Pill-Shaped Read More Button */
.read-more-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    padding: 8px 18px;
    border-radius: 20px;
    margin-top: var(--spacing-xs);
    transition: all var(--transition-speed);
}

.read-more-pill:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.pill-text {
    letter-spacing: 0.3px;
}

.pill-icon {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-speed);
}

.read-more-pill:hover .pill-icon {
    transform: translateX(2px);
}

.read-more-pill.expanded {
    background: var(--color-primary);
    color: white;
}

.read-more-pill.expanded .pill-icon {
    transform: rotate(90deg);
}

.read-more-pill.expanded .pill-text::after {
    content: ' Less';
}

.timeline-date {
    display: inline-block;
    font-size: var(--font-size-small);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline-content h3 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.5rem;
}

.timeline-content h4 {
    color: var(--color-secondary);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.timeline-content h5 {
    color: var(--color-text);
    font-size: 1.125rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.timeline-content ul {
    list-style: none;
    padding-left: 0;
    margin: var(--spacing-sm) 0;
}

.timeline-content ul li {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    position: relative;
    color: var(--color-text-light);
    line-height: 1.8;
}

.timeline-content ul li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: 0.75rem;
    top: 0.4em;
}

/* Read More Button */
.read-more-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-background-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-small);
    cursor: pointer;
    transition: all var(--transition-speed);
}

.read-more-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-icon {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-speed);
}

.read-more-btn.expanded .btn-icon {
    transform: rotate(180deg);
}

.expandable-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-speed-slow) ease-out;
}

.expandable-content.expanded {
    max-height: 2000px;
    transition: max-height var(--transition-speed-slow) ease-in;
}

.experience-section {
    margin: var(--spacing-md) 0;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
}

/* Tech Stack Visual Representation */
.tech-stack-visual {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--color-border-light);
}

.tech-stack-visual h5 {
    font-size: var(--font-size-small);
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
}

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

.tech-pill {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    border: 2px solid;
    transition: all var(--transition-speed);
    cursor: default;
}

.tech-pill:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Color-coded tech pills */
.tech-pill.primary {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.tech-pill.cloud {
    background: rgba(14, 165, 233, 0.1);
    border-color: #0ea5e9;
    color: #0369a1;
}

.tech-pill.ai {
    background: rgba(139, 92, 246, 0.1);
    border-color: #8b5cf6;
    color: #6d28d9;
}

.tech-pill.arch {
    background: rgba(16, 185, 129, 0.1);
    border-color: #10b981;
    color: #047857;
}

.tech-pill.security {
    background: rgba(239, 68, 68, 0.1);
    border-color: #ef4444;
    color: #b91c1c;
}

.tech-pill.method {
    background: rgba(245, 158, 11, 0.1);
    border-color: #f59e0b;
    color: #d97706;
}

.tech-pill.compliance {
    background: rgba(100, 116, 139, 0.1);
    border-color: #64748b;
    color: #475569;
}

[data-theme="dark"] .tech-pill.primary { color: #60a5fa; }
[data-theme="dark"] .tech-pill.cloud { color: #38bdf8; }
[data-theme="dark"] .tech-pill.ai { color: #a78bfa; }
[data-theme="dark"] .tech-pill.arch { color: #34d399; }
[data-theme="dark"] .tech-pill.security { color: #f87171; }
[data-theme="dark"] .tech-pill.method { color: #fbbf24; }
[data-theme="dark"] .tech-pill.compliance { color: #94a3b8; }

/* ==========================================
   Testimonials Section
   ========================================== */
.testimonials {
    background: var(--color-background);
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

/* Testimonials Carousel Container */
.testimonials-marquee-wrapper {
    position: relative;
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-md) 80px; /* Space for arrows and prevent clipping */
}

.testimonials-marquee {
    overflow: hidden;
    width: 100%;
}

.testimonials-track {
    display: flex;
    gap: var(--spacing-xl);
    transition: transform 0.5s ease-in-out;
}

/* Testimonial Card */
.testimonial-card {
    flex: 0 0 calc(33.333% - var(--spacing-xl));
    background: var(--color-background-elevated);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-speed);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-width: 350px;
}

.testimonial-card:hover {
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

/* Quote Mark */
.quote-mark {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
    opacity: 0.3;
    margin-bottom: var(--spacing-xs);
}

/* Testimonial Text */
.testimonial-text {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-light);
    font-style: italic;
    margin: 0;
    flex-grow: 1;
}

/* Author Section */
.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-primary);
    flex-shrink: 0;
}

.author-details h4 {
    margin: 0 0 4px 0;
    color: var(--color-text);
    font-size: var(--font-size-large);
    font-weight: var(--font-weight-semibold);
}

.author-details p {
    margin: 0;
    color: var(--color-text-light);
    font-size: var(--font-size-small);
    line-height: 1.4;
}

.author-details .company {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    margin-top: 2px;
}

/* Navigation Arrows */
.testimonial-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: var(--color-background-elevated);
    border: 2px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-speed);
    z-index: 10;
}

.testimonial-nav:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-50%) scale(1.1);
}

.testimonial-nav:hover svg {
    color: white;
}

.testimonial-nav.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

.testimonial-nav svg {
    width: 24px;
    height: 24px;
    color: var(--color-text);
    transition: color var(--transition-speed);
}

.testimonial-nav-prev {
    left: 10px;
}

.testimonial-nav-next {
    right: 10px;
}

/* Testimonial Dots Indicator */
.testimonial-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xl);
}

.testimonial-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-border);
    cursor: pointer;
    transition: all var(--transition-speed);
}

.testimonial-dot.active {
    background: var(--color-primary);
    width: 32px;
    border-radius: 6px;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .testimonials-track {
        gap: var(--spacing-md);
    }
    
    .testimonial-card {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .testimonials {
        padding: var(--spacing-2xl) 0;
    }

    .testimonials-marquee-wrapper {
        padding: var(--spacing-md) 60px;
    }

    .testimonial-card {
        flex: 0 0 100%;
        max-width: 100%;
        min-width: auto;
        padding: var(--spacing-md);
    }

    .testimonial-text {
        font-size: 0.95rem;
    }

    .quote-mark {
        width: 24px;
        height: 24px;
    }

    .author-avatar {
        width: 45px;
        height: 45px;
    }

    .testimonial-nav {
        width: 40px;
        height: 40px;
    }

    .testimonial-nav svg {
        width: 20px;
        height: 20px;
    }

    .testimonial-nav-prev {
        left: 8px;
    }

    .testimonial-nav-next {
        right: 8px;
    }
}

/* ==========================================
   Contact Section
   ========================================== */
.contact {
    background-color: var(--color-background-alt);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-2xl);
    max-width: 1000px;
    margin: 0 auto;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.form-group label {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    font-size: var(--font-size-small);
}

.form-group input,
.form-group textarea {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    background: var(--color-background-elevated);
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-speed);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

/* Contact Info */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-card {
    background: var(--color-background-elevated);
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: all var(--transition-speed);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.contact-card h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.contact-card a {
    color: var(--color-text-light);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
}

.contact-card a:hover {
    color: var(--color-primary);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background-color: var(--color-background-alt);
    color: var(--color-text-light);
    text-align: center;
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
}

.footer p {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
}

.footer-location {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 968px) {
    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-image-container {
        height: 450px;
        margin-top: var(--spacing-lg);
    }

    .about-image {
        object-position: 60% center;
    }

    .about-location {
        font-size: 0.85rem;
        padding: 8px var(--spacing-md);
    }

    .location-icon {
        width: 18px;
        height: 18px;
    }

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

@media (max-width: 768px) {
    /* Typography */
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
    
    /* Navigation */
    .nav-toggle {
        display: flex;
    }

    /* Logo on mobile */
    .nav.scrolled .nav-logo-image {
        width: 32px;
        height: 32px;
    }

    .nav.scrolled .nav-logo-text {
        font-size: 0.875rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        flex-direction: column;
        background-color: var(--color-background);
        width: 100%;
        text-align: center;
        transition: left 0.3s;
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg) 0;
        gap: var(--spacing-sm);
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }

    .btn-nav {
        margin: 0 auto;
    }
    
    /* Hero */
    .hero {
        min-height: auto;
        padding: calc(60px + var(--spacing-xl)) 0 var(--spacing-xl);
    }
    
    .hero-image-wrapper {
        width: 140px;
        height: 140px;
    }

    .hero-title {
        font-size: 1.75rem;
        flex-direction: column;
        gap: 0.3rem;
    }
    
    .hero-greeting {
        display: block;
        text-align: center;
    }
    
    .hero-name-wrapper {
        display: inline-flex;
        align-items: center;
        gap: 0.2rem;
        justify-content: center;
        width: 100%;
    }

    .hero-content {
        padding: 0 var(--spacing-sm);
    }

    .code-block {
        font-size: 0.75rem;
        margin: var(--spacing-lg) 0;
    }
    
    .code-content {
        padding: var(--spacing-sm);
        font-size: 0.75rem;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* Timeline */
    .timeline {
        padding-left: var(--spacing-md);
    }
    
    .timeline-content {
        margin-left: var(--spacing-sm);
        padding: var(--spacing-md);
    }
    
    .timeline-marker {
        left: calc(-1 * var(--spacing-md) - 7px);
    }

    /* Experience Header Mobile */
    .experience-header {
        flex-direction: column-reverse;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .company-logo {
        max-width: 100px;
        max-height: 40px;
        align-self: flex-end;
    }

    .experience-summary {
        font-size: var(--font-size-small);
    }

    .read-more-pill {
        font-size: 0.8rem;
        padding: 6px 14px;
    }

    .tech-pill {
        font-size: 0.75rem;
        padding: 6px 12px;
    }
    

    /* Tech Grid */
    .tech-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    /* Theme Toggle */
    .theme-toggle {
        top: 70px;
        right: var(--spacing-md);
    }

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

@media (max-width: 480px) {
    :root {
        --font-size-base: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-image-wrapper {
        width: 120px;
        height: 120px;
    }

    .hero-content {
        padding: 0 var(--spacing-xs);
    }

    .code-block {
        margin: var(--spacing-md) 0;
    }
    
    .code-content {
        font-size: 0.7rem;
        padding: var(--spacing-xs);
    }

    .tech-marquee-content span {
        font-size: 0.75rem;
        padding: 6px 12px;
    }
}

/* ==========================================
   Accessibility & Focus States
   ========================================== */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn:focus-visible {
    outline-offset: 4px;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==========================================
   Print Styles
   ========================================== */
@media print {
    .nav,
    .theme-toggle,
    .hero-cta,
    .contact-form {
        display: none;
    }
    
    body {
        font-size: 12pt;
    }
    
    section {
        page-break-inside: avoid;
    }
}

/* ==========================================
   Hero Grid Pattern
   ========================================== */
.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    background-image: 
        linear-gradient(rgba(37, 99, 235, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

[data-theme="dark"] .hero-grid {
    background-image: 
        linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    .hero-grid {
        animation: none;
    }
}