/* ===================================
   ANURAG SINGH PORTFOLIO DESIGN SYSTEM
   Deep Dark Glassmorphic Aesthetic
   Optimized for High-Refresh Displays (144Hz+)
   =================================== */

:root {
    /* Color Palette */
    --color-bg: #08080c;
    --color-surface: #111118;
    --color-surface-hover: #181824;
    --color-surface-elevated: #1a1a26;
    
    --color-primary: #ff2a2a;
    --color-primary-glow: rgba(255, 42, 42, 0.35);
    --color-primary-dark: #cc0000;
    --color-accent-amber: #ff9900;
    --color-accent-green: #00e676;
    --color-accent-blue: #00b0ff;
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0b8;
    --color-text-muted: #67677a;
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 42, 42, 0.4);
    --color-glass-bg: rgba(17, 17, 24, 0.85);
    --color-glass-border: rgba(255, 255, 255, 0.06);

    /* Typography System - Inter & Space Grotesk */
    --font-heading: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Layout Dimensions */
    --sidebar-width: 320px;
    --header-height-mobile: 70px;

    /* Spacing Scale */
    --spacing-xs: 0.4rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.25rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4.5rem;

    /* Border Radii */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Transitions & Shadows */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.25s ease-out;
    --transition-slow: 0.4s ease-out;
    
    --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --shadow-glow: 0 0 25px var(--color-primary-glow);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    color-scheme: dark;
}

/* 144Hz Smooth Scrolling Optimization: 
   Fixed background pseudoelement prevents full page repaints during scroll */
body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(255, 42, 42, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 85% 75%, rgba(0, 176, 255, 0.03) 0%, transparent 45%);
    transform: translate3d(0, 0, 0);
    will-change: transform;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
    background: #252533;
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* ===================================
   Mobile Header & Toggle
   =================================== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height-mobile);
    background: rgba(8, 8, 12, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 999;
    padding: 0 var(--spacing-md);
    align-items: center;
    justify-content: space-between;
    transform: translate3d(0,0,0);
}

.mobile-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.mobile-menu-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    background: var(--color-surface);
}

.mobile-menu-toggle svg {
    width: 24px;
    height: 24px;
}

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.sidebar-backdrop.active {
    display: block;
    opacity: 1;
}

/* ===================================
   Sidebar Navigation Architecture
   =================================== */
.sidebar {
    position: fixed;
    left: var(--spacing-md);
    top: var(--spacing-md);
    bottom: var(--spacing-md);
    width: var(--sidebar-width);
    background: var(--color-glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg) var(--spacing-md);
    overflow-y: auto;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-glass);
    scrollbar-width: none;
    overscroll-behavior: contain;
    transform: translate3d(0,0,0);
    transition: transform var(--transition-normal);
}

.sidebar::-webkit-scrollbar {
    display: none;
}

.sidebar-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    height: 100%;
}

.profile-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(0, 230, 118, 0.1);
    border: 1px solid rgba(0, 230, 118, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-accent-green);
    letter-spacing: 0.5px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-accent-green);
    box-shadow: 0 0 10px var(--color-accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.85); }
}

.sidebar-name {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 0%, #d0d0e0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-tagline {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    text-align: center;
    line-height: 1.4;
    margin-top: -8px;
}

.profile-image-container {
    width: 100%;
    max-width: 190px;
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 2px solid var(--color-border);
    box-shadow: 0 12px 24px rgba(0,0,0,0.4);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.profile-image-container:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.profile-image {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    object-position: center top;
    display: block;
}

.sidebar-info-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    width: 100%;
}

.sidebar-email {
    color: var(--color-text-primary);
    font-size: 0.88rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.sidebar-email:hover {
    color: var(--color-primary);
    border-color: var(--color-primary-glow);
}

.sidebar-location {
    color: var(--color-text-muted);
    font-size: 0.82rem;
    display: flex;
    align-items: center;
    gap: 4px;
}

.social-icons {
    display: flex;
    gap: var(--spacing-xs);
    margin: var(--spacing-xs) 0;
    flex-wrap: wrap;
    justify-content: center;
}

.social-icon {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color var(--transition-fast), transform var(--transition-fast), background-color var(--transition-fast);
}

.social-icon svg {
    width: 18px;
    height: 18px;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.social-icon:hover {
    border-color: var(--color-primary);
    background: rgba(255, 42, 42, 0.1);
    transform: translateY(-3px);
}

.social-icon:hover svg {
    color: var(--color-primary);
}

.sidebar-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    width: 100%;
    margin-top: auto;
}

.btn-primary {
    width: 100%;
    padding: 0.85rem 1.25rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, #b30000 100%);
    color: var(--color-text-primary);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
    box-shadow: 0 4px 18px var(--color-primary-glow);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #ff4d4d 0%, var(--color-primary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255, 42, 42, 0.5);
}

.btn-secondary {
    width: 100%;
    padding: 0.8rem 1.25rem;
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.88rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(255, 42, 42, 0.05);
    transform: translateY(-2px);
}

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

/* ===================================
   Main Content Layout & Section Styles
   =================================== */
.main-content {
    margin-left: calc(var(--sidebar-width) + var(--spacing-md) * 2);
    padding: var(--spacing-xl) var(--spacing-2xl) var(--spacing-xl) var(--spacing-md);
    max-width: 1200px;
}

/* Optimized Section Reveal for 144Hz Smoothness */
.section {
    margin-bottom: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    opacity: 0;
    transform: translate3d(0, 20px, 0);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
    will-change: opacity, transform;
    backface-visibility: hidden;
}

.section.visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

.section-header {
    margin-bottom: var(--spacing-xl);
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    background: rgba(255, 255, 255, 0.03);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.section-heading {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.recruiter-callout-banner {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    background: rgba(255, 42, 42, 0.08);
    border: 1px solid var(--color-border-hover);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: #ff8080;
    margin-bottom: var(--spacing-md);
    max-width: max-content;
}

.hero-heading {
    font-family: var(--font-heading);
    font-size: 3.4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.03em;
}

.hero-subheading {
    font-size: 1.6rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.hero-description {
    font-size: 1.08rem;
    color: var(--color-text-secondary);
    max-width: 720px;
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

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

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    max-width: 850px;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: transform var(--transition-fast), border-color var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--color-primary);
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.stat-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
    background: var(--color-surface-hover);
}

.stat-card:hover::after {
    opacity: 1;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-text-primary);
    margin-bottom: 6px;
    background: linear-gradient(135deg, #ffffff 30%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    line-height: 1.4;
}

.hero-cta-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

/* ===================================
   About Section
   =================================== */
.about-quote-box {
    padding: var(--spacing-lg);
    background: rgba(255, 42, 42, 0.03);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin-bottom: var(--spacing-xl);
}

.about-quote {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    font-style: italic;
    color: var(--color-text-primary);
    line-height: 1.4;
}

.about-text {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    max-width: 850px;
}

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

.highlight-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.highlight-box h4 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-size: 1.1rem;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.highlight-box p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* ===================================
   Experience & Resume Timeline Section
   =================================== */
.timeline {
    position: relative;
    padding-left: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-border));
}

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

.timeline-dot {
    position: absolute;
    left: calc(-1 * var(--spacing-xl) + 2px);
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--color-primary);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 10px var(--color-primary-glow);
}

.timeline-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: border-color var(--transition-fast);
}

.timeline-card:hover {
    border-color: var(--color-border-hover);
}

.timeline-header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 6px;
}

.timeline-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.timeline-period-badge {
    padding: 4px 12px;
    background: rgba(255, 42, 42, 0.1);
    border: 1px solid rgba(255, 42, 42, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
}

.timeline-company {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.timeline-bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.timeline-bullets li {
    position: relative;
    padding-left: 20px;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.timeline-bullets li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.resume-download-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 42, 42, 0.05);
    border: 1px solid var(--color-border-hover);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.resume-download-text h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
}

.resume-download-text p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* ===================================
   Skills Matrix Section
   =================================== */
.skills-matrix {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.skill-category-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: transform var(--transition-normal), border-color var(--transition-fast), box-shadow var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.skill-category-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.skill-icon-wrap {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: rgba(255, 42, 42, 0.1);
    border: 1px solid rgba(255, 42, 42, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.skill-icon-wrap svg {
    width: 22px;
    height: 22px;
}

.skill-category-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.skill-chips-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-chip {
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    transition: transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.skill-chip.featured {
    background: rgba(255, 42, 42, 0.08);
    border-color: rgba(255, 42, 42, 0.3);
    color: #ff9999;
    font-weight: 500;
}

.skill-chip:hover {
    border-color: var(--color-primary);
    color: var(--color-text-primary);
    transform: translateY(-1px);
}

/* ===================================
   Portfolio Section & Featured Hierarchy
   =================================== */
.portfolio-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    padding-bottom: var(--spacing-xs);
}

.tab-btn {
    padding: 9px 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-size: 0.88rem;
    font-weight: 600;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.tab-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-text-primary);
}

.tab-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
    box-shadow: 0 4px 15px var(--color-primary-glow);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal), border-color var(--transition-fast), box-shadow var(--transition-normal);
    position: relative;
}

.project-card.featured-card {
    border: 1px solid rgba(255, 42, 42, 0.3);
    background: linear-gradient(180deg, rgba(255, 42, 42, 0.03) 0%, var(--color-surface) 100%);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.project-card.featured-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent-amber));
    z-index: 10;
}

.project-card.hidden {
    display: none !important;
}

.project-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-5px);
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.5);
}

.project-thumbnail-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #14141d;
}

.project-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-thumbnail {
    transform: scale(1.04);
}

.project-badge-flagship {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    background: rgba(8, 8, 12, 0.88);
    backdrop-filter: blur(8px);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.project-overlay-links {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 8px;
    z-index: 5;
}

.project-icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(8, 8, 12, 0.88);
    backdrop-filter: blur(8px);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    transition: transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.project-icon-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: scale(1.1);
}

.project-icon-btn svg {
    width: 17px;
    height: 17px;
}

.project-body {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--color-text-primary);
}

.project-subtitle {
    font-size: 0.85rem;
    color: var(--color-accent-amber);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.project-description {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.project-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: auto;
    margin-bottom: var(--spacing-md);
}

.tech-tag {
    padding: 3px 9px;
    background: rgba(255, 42, 42, 0.08);
    border: 1px solid rgba(255, 42, 42, 0.2);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    color: #ff9999;
}

.project-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.btn-details-trigger {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--transition-fast);
}

.btn-details-trigger:hover {
    gap: 8px;
}

/* ===================================
   YouTube Showcase Unit (Interactive & Video Player)
   =================================== */
.youtube-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.youtube-card-wrapper {
    position: relative;
    width: 100%;
    max-width: 850px;
    aspect-ratio: 16/9;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5);
    background: #000;
}

.youtube-thumbnail-container {
    position: absolute;
    inset: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
}

.youtube-thumbnail-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.85;
    transition: transform var(--transition-slow), opacity var(--transition-normal);
}

.youtube-thumbnail-container:hover .youtube-thumbnail-img {
    transform: scale(1.03);
    opacity: 1;
}

.youtube-play-btn {
    position: absolute;
    width: 76px;
    height: 52px;
    background: rgba(255, 0, 0, 0.9);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 25px rgba(255, 0, 0, 0.5);
    transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.youtube-play-btn svg {
    width: 26px;
    height: 26px;
    fill: #ffffff;
    margin-left: 3px;
}

.youtube-thumbnail-container:hover .youtube-play-btn {
    background: #ff0000;
    transform: scale(1.1);
}

.youtube-player-iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

.youtube-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    text-align: center;
    max-width: 650px;
}

/* ===================================
   Modal Component (Project Details)
   =================================== */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border-hover);
    border-radius: var(--radius-xl);
    max-width: 750px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-xl);
    position: relative;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.6);
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.modal-backdrop.active .modal-container {
    transform: scale(1);
}

.modal-close-btn {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.modal-close-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.modal-subtitle {
    color: var(--color-accent-amber);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
}

.modal-section-heading {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: var(--spacing-md) 0 8px;
}

.modal-bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.modal-bullets li {
    padding-left: 18px;
    position: relative;
    font-size: 0.93rem;
    color: var(--color-text-secondary);
}

.modal-bullets li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* ===================================
   Contact Section & Form
   =================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.contact-info-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon-wrap {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-md);
    background: rgba(255, 42, 42, 0.1);
    border: 1px solid rgba(255, 42, 42, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-card-text h5 {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-card-text p, .contact-card-text a {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.contact-form-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.8rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: 0.92rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    outline: none;
}

/* Toast Component */
.toast-notification {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 12px 24px;
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    z-index: 3000;
    transform: translateY(100px);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.toast-notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Footer */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.88rem;
    margin-top: var(--spacing-2xl);
}

/* ===================================
   Responsive Breakpoints
   =================================== */
@media (max-width: 1024px) {
    .mobile-header {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
        top: 0;
        bottom: 0;
        left: 0;
        height: 100vh;
        border-radius: 0;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: calc(var(--header-height-mobile) + var(--spacing-md)) var(--spacing-md) var(--spacing-xl);
    }

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

@media (max-width: 640px) {
    .hero-heading {
        font-size: 2.4rem;
    }
    .hero-subheading {
        font-size: 1.25rem;
    }
    .stats-row {
        grid-template-columns: 1fr 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}