/*=================================================================
  ABDELLAH ENNAJARI - AI ENGINEER PORTFOLIO
  Modern, Premium Design System
  Version: 2.0
=================================================================*/

/*-----------------------------------------------------------------
  DESIGN TOKENS & CSS VARIABLES
-----------------------------------------------------------------*/
:root {
    /* Primary Brand Colors - AI Engineer Theme */
    --color-primary: #00ffc8;        /* Neon Teal - Accent */
    --color-primary-light: #4dffdc;
    --color-primary-dark: #00d4a8;
    --color-secondary: #121212;      /* Near-black secondary */
    --color-secondary-light: #1a1a1a;
    --color-secondary-dark: #0d0d0d;
    --color-accent: #00e1ff;         /* Cyan accent */
    --color-accent-light: #57ecff;
    --color-accent-dark: #00b6d6;

    /* Neural Network Gradient */
    --gradient-neural: linear-gradient(135deg, #00ffc8 0%, #00e1ff 50%, #00ffc8 100%);
    --gradient-ai: linear-gradient(135deg, #00ffc8 0%, #00e1ff 100%);
    --gradient-mesh: radial-gradient(circle at 20% 50%, rgba(0, 255, 200, 0.12) 0%, transparent 50%),
                     radial-gradient(circle at 80% 80%, rgba(0, 225, 255, 0.12) 0%, transparent 50%),
                     radial-gradient(circle at 40% 20%, rgba(0, 255, 200, 0.08) 0%, transparent 50%);

    /* Default Theme Colors (Light Mode) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --bg-elevated: #ffffff;
    --text-primary: #0a0a0a;
    --text-secondary: #333333;
    --text-tertiary: #666666;
    --text-inverse: #ffffff;
    --border-color: #dee2e6;
    --border-hover: #ced4da;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --overlay: rgba(0, 0, 0, 0.3);

    /* Typography Scale - Modern & Elegant */
    --font-display: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    --font-size-5xl: 3rem;        /* 48px */
    --font-size-6xl: 3.75rem;     /* 60px */
    --font-size-7xl: 4.5rem;      /* 72px */

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    --letter-spacing-tight: -0.025em;
    --letter-spacing-normal: 0em;
    --letter-spacing-wide: 0.025em;

    /* Spacing Scale */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    --space-32: 8rem;     /* 128px */

    /* Borders & Radius */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-3xl: 2rem;      /* 32px */
    --radius-full: 9999px;

    /* Shadows - Layered & Sophisticated */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 15px rgba(99, 102, 241, 0.3), 0 0 30px rgba(139, 92, 246, 0.2);
    --shadow-glow-lg: 0 0 30px rgba(99, 102, 241, 0.4), 0 0 60px rgba(139, 92, 246, 0.3);

    /* Transitions & Animations */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-notification: 1080;
}

/* Dark Theme (default) */
.dark {
    --bg-primary: #0a0a0a;
    --bg-secondary: #121212;
    --bg-tertiary: #1a1a1a;
    --bg-elevated: #121212;
    --text-primary: #f5f5f5;
    --text-secondary: #cccccc;
    --text-tertiary: #999999;
    --text-inverse: #0a0a0a;
    --border-color: #232323;
    --border-hover: #2c2c2c;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --overlay: rgba(0, 0, 0, 0.6);

    /* Enhanced shadows for dark mode */
    --shadow-glow: 0 0 20px rgba(0, 255, 200, 0.3), 0 0 40px rgba(0, 225, 255, 0.2);
    --shadow-glow-lg: 0 0 40px rgba(0, 255, 200, 0.4), 0 0 80px rgba(0, 225, 255, 0.3);
}

/* Light Theme - Explicit override (redundant but ensures clarity) */
body:not(.dark) {
    /* Light mode shadows */
    --shadow-glow: 0 0 20px rgba(0, 255, 200, 0.2), 0 0 40px rgba(0, 225, 255, 0.15);
    --shadow-glow-lg: 0 0 40px rgba(0, 255, 200, 0.3), 0 0 80px rgba(0, 225, 255, 0.2);
}

/*-----------------------------------------------------------------
  BASE STYLES & RESET
-----------------------------------------------------------------*/
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

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

/* Selection */
::selection {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

::-moz-selection {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

/*-----------------------------------------------------------------
  TYPOGRAPHY
-----------------------------------------------------------------*/
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: var(--letter-spacing-tight);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: clamp(2.5rem, 5vw, var(--font-size-6xl));
    font-weight: var(--font-weight-extrabold);
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(2rem, 4vw, var(--font-size-5xl));
    font-weight: var(--font-weight-bold);
}

h3 {
    font-size: clamp(1.5rem, 3vw, var(--font-size-3xl));
}

h4 {
    font-size: var(--font-size-2xl);
}

h5 {
    font-size: var(--font-size-xl);
}

h6 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

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

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

strong {
    font-weight: var(--font-weight-semibold);
}

em {
    font-style: italic;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--bg-tertiary);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
}

/* Text Utilities */
.text-gradient {
    background: var(--gradient-neural);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.text-glow {
    text-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

/*-----------------------------------------------------------------
  LAYOUT COMPONENTS
-----------------------------------------------------------------*/
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.container-wide {
    max-width: 1440px;
}

.container-narrow {
    max-width: 960px;
}

.section {
    padding: var(--space-24) 0;
    position: relative;
}

.section-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-32) 0;
    position: relative;
    overflow: hidden;
}

/*-----------------------------------------------------------------
  NAVIGATION - Modern & Glassmorphic with Sticky Header
-----------------------------------------------------------------*/
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-base);
    transform: translateY(0);
}

/* Sticky header animation */
.navbar.scrolled {
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    border-bottom-width: 1px;
}

.navbar.scrolled .navbar-content {
    padding: var(--space-3) 0;
}

/* Ensure navbar stays visible on scroll */
.navbar {
    will-change: transform, backdrop-filter;
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Offset for fixed navbar */
}

.dark .navbar {
    background: rgba(10, 10, 10, 0.85);
    border-bottom-color: var(--border-color);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

body:not(.dark) .navbar {
    background: rgba(255, 255, 255, 0.9);
    border-bottom-color: var(--border-color);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
}

.dark .navbar.scrolled {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

body:not(.dark) .navbar.scrolled {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
}

.navbar-logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--letter-spacing-tight);
    background: var(--gradient-neural);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform var(--transition-base);
}

.navbar-logo:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    gap: var(--space-2);
    align-items: center;
    list-style: none;
}

.nav-link {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--color-primary);
    background: rgba(0, 255, 200, 0.1);
}

.dark .nav-link:hover {
    background: rgba(0, 255, 200, 0.15);
}

body:not(.dark) .nav-link:hover {
    background: rgba(0, 255, 200, 0.08);
}

.nav-link.active {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--gradient-neural);
    border-radius: var(--radius-full);
}

/*-----------------------------------------------------------------
  BUTTONS - Premium & Interactive
-----------------------------------------------------------------*/
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    line-height: 1;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left var(--transition-slower);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-neural);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md), 0 0 0 0 rgba(99, 102, 241, 0.5);
    animation: pulse-shadow 2s infinite;
}

@keyframes pulse-shadow {
    0%, 100% {
        box-shadow: var(--shadow-md), 0 0 0 0 rgba(99, 102, 241, 0.5);
    }
    50% {
        box-shadow: var(--shadow-lg), 0 0 0 8px rgba(99, 102, 241, 0);
    }
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
}

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

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

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

.dark .btn-ghost:hover {
    background: rgba(26, 26, 26, 0.8);
    border-color: rgba(0, 255, 200, 0.2);
}

body:not(.dark) .btn-ghost:hover {
    background: rgba(233, 236, 239, 0.5);
    border-color: rgba(0, 255, 200, 0.15);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
}

/*-----------------------------------------------------------------
  CARDS - Modern & Elevated
-----------------------------------------------------------------*/
.card {
    background: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-neural);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

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

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl), 0 0 0 1px rgba(99, 102, 241, 0.1);
}

.dark .card:hover {
    box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

.card-header {
    margin-bottom: var(--space-6);
}

.card-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-2);
}

.card-description {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

.card-body {
    margin-bottom: var(--space-6);
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
}

/* Glass Card Variant */
.card-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.dark .card-glass {
    background: rgba(30, 41, 59, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/*-----------------------------------------------------------------
  HERO SECTION - Stunning & Immersive
-----------------------------------------------------------------*/
.hero {
    position: relative;
    z-index: 1;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: -1;
    overflow: hidden;
}

.hero-gradient-mesh {
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    opacity: 0.6;
}

.dark .hero-gradient-mesh {
    opacity: 0.4;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.hero-text {
    animation: fadeInUp 1s var(--ease-out) backwards;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-6);
    animation: pulse 2s ease-in-out infinite;
}

.hero-title {
    font-size: clamp(3rem, 6vw, var(--font-size-7xl));
    line-height: 1.1;
    margin-bottom: var(--space-6);
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    line-height: var(--line-height-relaxed);
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    animation: fadeInUp 1s var(--ease-out) 0.2s backwards;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-2xl);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

/*-----------------------------------------------------------------
  SKILL CARDS - Interactive & Visual
-----------------------------------------------------------------*/
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    max-width: 1400px;
    margin: 0 auto;
}

.skill-card {
    position: relative;
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border: 1px solid transparent;
    background:
        linear-gradient(var(--bg-elevated), var(--bg-elevated)) padding-box,
        var(--gradient-neural) border-box;
    background-clip: padding-box, border-box;
    transition: all var(--transition-base);
    cursor: pointer;
}

.skill-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.skill-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-4);
    transition: transform var(--transition-base);
}

.skill-card:hover .skill-icon {
    transform: scale(1.1) rotate(5deg);
}

.skill-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
}

.skill-level {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}

.skill-bar {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-top: var(--space-2);
}

.skill-bar-fill {
    height: 100%;
    background: var(--gradient-neural);
    border-radius: var(--radius-full);
    transition: width 1s var(--ease-out);
}

/*-----------------------------------------------------------------
  PROJECT CARDS - Portfolio Showcase
-----------------------------------------------------------------*/
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-8);
}

/*-----------------------------------------------------------------
  EXPERIENCE SECTION - Elevated Timeline Cards
  ACCESSIBILITY: WCAG AA compliant contrast, optimized overlays
-----------------------------------------------------------------*/
/* CSS Variables for Experience Cards - Dark Mode */
:root {
    --exp-card-bg: rgba(26, 26, 26, 1);
    --exp-card-bg-hover: rgba(30, 30, 30, 1);
    --exp-card-border: rgba(0, 255, 200, 0.15);
    --exp-card-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.4);
    --exp-card-shadow-hover: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --exp-card-overlay-hover: rgba(0, 255, 200, 0.03);
    --exp-badge-bg: rgba(0, 255, 200, 0.15);
    --exp-badge-text: #e0e0e0;
    --exp-icon-color: #00ffc8;
    --exp-text-primary: #f5f5f5;
    --exp-text-secondary: #d4d4d4;
}

/* Light Mode Overrides */
body:not(.dark) {
    --exp-card-bg: rgba(255, 255, 255, 1);
    --exp-card-bg-hover: rgba(248, 249, 250, 1);
    --exp-card-border: rgba(0, 200, 180, 0.2);
    --exp-card-shadow: 0 8px 24px -8px rgba(0, 0, 0, 0.12);
    --exp-card-shadow-hover: 0 12px 32px -10px rgba(0, 0, 0, 0.18);
    --exp-card-overlay-hover: rgba(0, 255, 200, 0.04);
    --exp-badge-bg: rgba(0, 200, 180, 0.12);
    --exp-badge-text: #1a1a1a;
    --exp-icon-color: #00c896;
    --exp-text-primary: #0a0a0a;
    --exp-text-secondary: #404040;
}

.experience-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-10);
}

.experience-card {
    position: relative;
    padding: var(--space-8) var(--space-10);
    overflow: visible;
    border: 1.5px solid var(--exp-card-border);
    box-shadow: var(--exp-card-shadow), 0 0 0 1px var(--exp-card-border);
    background: var(--exp-card-bg);
    transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
    will-change: transform;
}

/* Subtle hover overlay - minimal opacity to preserve text contrast */
.experience-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--exp-card-overlay-hover);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
    z-index: 0;
}

.experience-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--exp-card-shadow-hover), 0 0 0 2px var(--exp-card-border);
    background: var(--exp-card-bg-hover);
}

.experience-card:hover::before {
    opacity: 1;
}

/* Ensure content stays above overlay */
.experience-card > * {
    position: relative;
    z-index: 1;
}

/* Focus visible for accessibility */
.experience-card:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 4px;
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-6);
    flex-wrap: wrap;
    margin-bottom: var(--space-6);
}

.experience-role {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-2);
    color: var(--exp-text-primary);
    line-height: 1.3;
}

.experience-company {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-lg);
    margin: 0;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.experience-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-3);
}

/* WCAG AA Compliant Badges */
.experience-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    min-height: 36px;
    border-radius: var(--radius-lg);
    background: var(--exp-badge-bg);
    color: var(--exp-badge-text);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border: 1px solid var(--exp-card-border);
    transition: all var(--transition-fast);
}

.dark .experience-chip {
    background: rgba(0, 255, 200, 0.18);
    color: #e8e8e8;
}

body:not(.dark) .experience-chip {
    background: rgba(0, 200, 180, 0.15);
    color: #1a1a1a;
}

.experience-chip:hover {
    background: var(--color-primary);
    color: var(--text-inverse);
    transform: translateY(-1px);
}

.experience-description {
    color: var(--exp-text-secondary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-6);
    margin-top: var(--space-4);
}

.experience-achievements {
    list-style: none;
    padding-left: 0;
    display: grid;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.experience-achievements li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    color: var(--exp-text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.7;
    padding-left: var(--space-1);
}

/* Enhanced icon contrast for WCAG AA */
.experience-achievements i {
    color: var(--exp-icon-color);
    margin-top: 0.35rem;
    font-size: 1.1rem;
    flex-shrink: 0;
    filter: brightness(1.2);
}

.dark .experience-achievements i {
    color: #00ffc8;
    filter: brightness(1.3) contrast(1.1);
}

body:not(.dark) .experience-achievements i {
    color: #00a87e;
    filter: none;
}

.experience-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-2);
}

/* Technology badges with enhanced contrast */
.experience-stack .project-tag {
    background: var(--exp-badge-bg);
    color: var(--exp-badge-text);
    border: 1.5px solid var(--exp-card-border);
    padding: var(--space-2) var(--space-4);
    font-weight: var(--font-weight-medium);
    min-height: 32px;
    transition: all var(--transition-fast);
}

.dark .experience-stack .project-tag {
    background: rgba(0, 255, 200, 0.15);
    color: #e8e8e8;
    border-color: rgba(0, 255, 200, 0.25);
}

body:not(.dark) .experience-stack .project-tag {
    background: rgba(0, 200, 180, 0.12);
    color: #1a1a1a;
    border-color: rgba(0, 200, 180, 0.3);
}

.experience-stack .project-tag:hover {
    background: var(--color-primary);
    color: var(--text-inverse);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.project-card {
    position: relative;
    background: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

.project-image {
    position: relative;
    width: 100%;
    height: 240px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slower);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-neural);
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-card:hover .project-overlay {
    opacity: 0.9;
}

.project-content {
    padding: var(--space-6);
}

.project-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-3);
}

.project-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.project-tag {
    padding: var(--space-1) var(--space-3);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.project-card:hover .project-tag {
    background: var(--color-primary);
    color: var(--text-inverse);
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/*-----------------------------------------------------------------
  TESTIMONIALS - Elegant Carousel
-----------------------------------------------------------------*/
.testimonials-container {
    position: relative;
    overflow: visible;
    padding: var(--space-8) 0;
}

.testimonials-track {
    display: flex;
    gap: var(--space-6);
    transition: transform var(--transition-base);
    align-items: stretch;
    overflow: visible !important;
    width: 100%;
    min-height: 0;
}

.testimonial-card {
    flex: 0 0 calc(33.333% - var(--space-4));
    background: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.testimonial-content {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    line-height: var(--line-height-relaxed);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.testimonial-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    border: 3px solid var(--color-primary);
}

.testimonial-name {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.testimonial-role {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}

/*-----------------------------------------------------------------
  FOOTER - Clean & Informative
-----------------------------------------------------------------*/
.footer {
    background: var(--bg-secondary);
    padding: var(--space-16) 0 var(--space-8);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-4);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-link {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

.social-links {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    margin-bottom: var(--space-4);
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.social-icon:hover {
    background: var(--gradient-neural);
    color: var(--text-inverse);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/*-----------------------------------------------------------------
  ANIMATIONS & MICRO-INTERACTIONS
-----------------------------------------------------------------*/
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s var(--ease-out);
}

.animate-slide-in-left {
    animation: slideInFromLeft 0.6s var(--ease-out);
}

.animate-slide-in-right {
    animation: slideInFromRight 0.6s var(--ease-out);
}

.animate-scale-in {
    animation: scaleIn 0.6s var(--ease-out);
}

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s var(--ease-out);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/*-----------------------------------------------------------------
  UTILITY CLASSES
-----------------------------------------------------------------*/
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-8 { padding: var(--space-8); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/*-----------------------------------------------------------------
  RESPONSIVE DESIGN - Enhanced Breakpoints
-----------------------------------------------------------------*/

/* Mobile First Approach - Base styles for mobile */
/* Breakpoints: 320px, 480px, 768px, 1024px, 1280px, 1536px */

/* Extra Small Devices (phones, 320px and up) */
@media (min-width: 320px) {
    .container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }
    
    .hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
        line-height: 1.2;
    }
    
    .hero-description p {
        font-size: clamp(0.875rem, 4vw, 1rem);
    }
}

/* Small Devices (landscape phones, 480px and up) */
@media (min-width: 480px) {
    .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
    
    .hero-title {
        font-size: clamp(2rem, 7vw, 3rem);
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--space-6);
    }
}

/* Medium Devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .container {
        padding-left: var(--space-8);
        padding-right: var(--space-8);
    }
    
    .section {
        padding: var(--space-20) 0;
    }
    
    .hero-content {
        grid-template-columns: 1.2fr 1fr;
        gap: var(--space-12);
    }
    
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
}

/* Large Devices (desktops, 1024px and up) */
@media (min-width: 1024px) {
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding-left: var(--space-10);
        padding-right: var(--space-10);
    }

    .section {
        padding: var(--space-24) 0;
    }

    .hero-content {
        grid-template-columns: 1.1fr 1fr;
        gap: var(--space-16);
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    }

    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1400px;
    }

    /* Recommendations - Let Vue.js handle flex sizing */
    .recommendations-track {
        gap: var(--space-6);
    }

    .recommendation-card-inner {
        padding: var(--space-8);
        min-height: 420px;
    }

    .recommendation-avatar {
        width: 72px;
        height: 72px;
    }

    .recommendation-nav-btn {
        width: 54px;
        height: 54px;
    }

    .recommendation-nav-prev {
        left: -27px;
    }

    .recommendation-nav-next {
        right: -27px;
    }
}

/* Extra Large Devices (large desktops, 1280px and up) */
@media (min-width: 1280px) {
    .container {
        max-width: 1400px;
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    }

    /* Recommendations - Let Vue.js handle flex sizing */
    .recommendation-card-inner {
        padding: var(--space-8);
        min-height: 440px;
    }

    .recommendation-nav-btn {
        width: 56px;
        height: 56px;
    }

    .recommendation-nav-prev {
        left: -28px;
    }

    .recommendation-nav-next {
        right: -28px;
    }
}

/* Ultra-wide Screens (1600px and up) */
@media (min-width: 1600px) {
    /* Recommendations - Let Vue.js handle flex sizing */
    .recommendation-card-inner {
        padding: var(--space-8);
        min-height: 460px;
    }
}

/* Small Tablets (600px - 767px) */
@media (min-width: 600px) and (max-width: 767px) {
    /* Recommendations - 1 card per view on small tablets */
    .recommendation-card-inner {
        padding: var(--space-6);
        min-height: 420px;
    }

    .recommendation-text {
        font-size: var(--font-size-sm);
        line-height: 1.7;
    }

    .recommendations-track {
        gap: var(--space-4);
    }

    .recommendation-avatar {
        width: 64px;
        height: 64px;
    }

    .recommendation-name {
        font-size: var(--font-size-lg);
    }

    /* Navigation arrows */
    .recommendation-nav-btn {
        width: 46px;
        height: 46px;
    }

    .recommendation-nav-prev {
        left: -12px;
    }

    .recommendation-nav-next {
        right: -12px;
    }
}

/* Mobile Specific (max-width: 767px) */
@media (max-width: 767px) {
    :root {
        --space-24: 3rem;
        --space-32: 4rem;
        --font-size-5xl: 2.5rem;
        --font-size-6xl: 3rem;
        --font-size-7xl: 3.5rem;
    }

    .section {
        padding: var(--space-12) 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        text-align: center;
    }
    
    .hero-text {
        order: 2;
    }
    
    .hero-image {
        order: 1;
        max-width: 280px;
        margin: 0 auto;
    }

    .hero-title {
        font-size: clamp(1.875rem, 8vw, 2.75rem);
        margin-bottom: var(--space-4);
    }

    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .testimonial-card {
        flex: 0 0 calc(100% - var(--space-4));
        min-width: 0;
    }

    .navbar-content {
        flex-wrap: nowrap;
        padding: var(--space-3) 0;
    }
    
    .navbar-logo {
        font-size: var(--font-size-lg);
    }

    .nav-menu {
        display: none;
    }
    
    /* Enhanced Mobile Menu */
    .mobile-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-elevated);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        z-index: var(--z-dropdown);
        overflow-y: auto;
        padding: var(--space-6);
        border-top: 1px solid var(--border-color);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
    }
    
    /* Mobile menu overlay backdrop */
    .mobile-nav::before {
        content: '';
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.3);
        z-index: -1;
        opacity: 0;
        transition: opacity 0.3s ease;
    }
    
    .mobile-nav:has(ul)::before {
        opacity: 1;
    }
    
    .dark .mobile-nav {
        background: rgba(10, 10, 10, 0.98);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    }
    
    .mobile-nav ul {
        display: flex;
        flex-direction: column;
        gap: var(--space-2);
        list-style: none;
        padding: 0;
        margin: 0;
    }
    
    .mobile-nav .nav-link {
        display: flex;
        align-items: center;
        padding: var(--space-4) var(--space-5);
        border-radius: var(--radius-lg);
        font-size: var(--font-size-base);
        font-weight: var(--font-weight-medium);
        transition: all var(--transition-base);
        min-height: 48px; /* Touch target size */
    }
    
    .mobile-nav .nav-link:hover,
    .mobile-nav .nav-link.active {
        background: var(--bg-secondary);
        transform: translateX(4px);
    }
    
    .mobile-nav .nav-link i {
        width: 24px;
        margin-right: var(--space-3);
        text-align: center;
    }
    
    /* Mobile Menu Button */
    .mobile-menu-btn {
        display: flex !important;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        min-width: 44px;
        min-height: 44px;
        border-radius: var(--radius-md);
        transition: all var(--transition-base);
    }
    
    .mobile-menu-btn:hover {
        background: var(--bg-secondary);
        transform: scale(1.05);
    }
    
    /* Hide language text on mobile, show only icon */
    .mobile-menu-btn ~ button .ml-2 {
        display: none;
    }
    
    /* Touch-friendly buttons */
    button, .btn, a.btn {
        min-height: 44px;
        min-width: 44px;
        padding: var(--space-3) var(--space-5);
    }
    
    /* Impact Metrics Grid - Mobile */
    .hero-description .reveal:last-of-type {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
        padding: var(--space-4);
    }
    
    /* Experience Cards Mobile Optimization */
    .experience-card {
        padding: var(--space-5);
        margin-left: calc(var(--space-2) * -1);
        margin-right: calc(var(--space-2) * -1);
        overflow: visible;
    }

    .experience-header {
        flex-direction: column;
        gap: var(--space-3);
        align-items: flex-start;
    }

    .experience-role {
        font-size: var(--font-size-lg);
    }

    .experience-company {
        font-size: var(--font-size-base);
    }

    .experience-meta {
        flex-direction: column;
        gap: var(--space-2);
        width: 100%;
    }

    .experience-chip {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-size-xs);
        min-height: 32px;
        width: 100%;
    }

    .experience-description {
        font-size: var(--font-size-sm);
        line-height: 1.6;
    }

    .experience-achievements {
        gap: var(--space-2);
    }

    .experience-achievements li {
        font-size: var(--font-size-sm);
        gap: var(--space-2);
        padding-left: var(--space-4);
    }

    .experience-stack {
        flex-wrap: wrap;
        gap: var(--space-2);
    }
    
    .experience-stack .project-tag {
        font-size: var(--font-size-xs);
        padding: var(--space-1) var(--space-3);
        min-height: 28px;
    }
    
    /* Vision Section - Mobile */
    #vision .container > div:first-of-type {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    /* Project Cards - Mobile */
    .project-card {
        padding: var(--space-5);
    }
    
    .project-card h3 {
        font-size: var(--font-size-xl);
    }
    
    /* Typography adjustments */
    h2 {
        font-size: clamp(1.75rem, 6vw, 2.5rem);
    }
    
    h3 {
        font-size: clamp(1.5rem, 5vw, 2rem);
    }
    
    /* Section spacing */
    .text-center.mb-16 {
        margin-bottom: var(--space-8);
    }
}

/* Tablet optimization (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .experience-card {
        padding: var(--space-8);
    }

    .experience-header {
        gap: var(--space-4);
        flex-direction: row;
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }

    .testimonial-card {
        flex: 0 0 calc(50% - var(--space-3));
    }

    /* Recommendations on tablet - 1 card per view for better readability */
    .recommendations-section .container {
        padding-left: var(--space-8);
        padding-right: var(--space-8);
    }

    .recommendations-carousel {
        padding: 0 15px;
    }

    .recommendation-card-inner {
        padding: var(--space-7);
        min-height: 400px;
    }

    .recommendation-text {
        font-size: var(--font-size-sm);
        line-height: 1.7;
    }

    .recommendations-track {
        gap: var(--space-5);
        overflow: visible !important;
    }

    .recommendation-avatar {
        width: 68px;
        height: 68px;
    }

    .recommendation-name {
        font-size: var(--font-size-lg);
    }

    .recommendation-nav-btn {
        width: 50px;
        height: 50px;
    }

    .recommendation-nav-prev {
        left: -18px;
    }

    .recommendation-nav-next {
        right: -18px;
    }

    /* Tablet Navigation */
    .nav-menu {
        gap: var(--space-1);
    }

    .nav-link {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-size-sm);
    }
}

/*-----------------------------------------------------------------
  CAROUSEL NAVIGATION DOTS - Responsive fixes
-----------------------------------------------------------------*/
/* Global carousel dots styling - Target ALL buttons in the dots container */
section#recommendations > div > div:last-child button {
    width: 12px !important;
    height: 12px !important;
    padding: 0 !important;
    margin: 0 !important;
    min-width: 12px !important;
    min-height: 12px !important;
    max-width: 12px !important;
    max-height: 12px !important;
    flex-shrink: 0 !important;
    box-sizing: border-box !important;
    border: none !important;
    cursor: pointer !important;
    transition: all 0.3s !important;
}

/* Navigation dots styling - ensure consistency across all screen sizes */
@media (max-width: 767px) {
    /* Ensure carousel navigation dots are properly sized on mobile */
    section#recommendations > div > div:last-child button {
        width: 10px !important;
        height: 10px !important;
        padding: 0 !important;
        margin: 0 !important;
        min-width: 10px !important;
        min-height: 10px !important;
        max-width: 10px !important;
        max-height: 10px !important;
        flex-shrink: 0 !important;
        box-sizing: border-box !important;
    }

    /* Ensure recommendation carousel shows one card at a time on mobile */
    .recommendation-card {
        flex: 0 0 100% !important;
        min-width: 100% !important;
        max-width: 100% !important;
    }

    /* Additional specificity for navigation dots container */
    section#recommendations > div > div:last-child {
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        gap: var(--space-2) !important;
        margin-top: var(--space-8) !important;
    }

    /* Mobile Recommendations - 1 card per view */
    .recommendations-section .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }

    .recommendations-carousel {
        padding: 0 10px;
    }

    .recommendation-card-inner {
        padding: var(--space-5);
        min-height: 480px;
    }

    .recommendation-text {
        font-size: var(--font-size-sm);
        line-height: 1.7;
    }

    .recommendations-track {
        overflow: visible !important;
        gap: var(--space-4);
    }

    .recommendation-avatar {
        width: 60px;
        height: 60px;
    }

    .recommendation-name {
        font-size: var(--font-size-base);
    }

    .recommendation-title {
        font-size: 12px;
    }

    /* Navigation buttons */
    .recommendation-nav-btn {
        width: 42px;
        height: 42px;
        font-size: var(--font-size-sm);
    }

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

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

    /* Pagination */
    .recommendations-pagination {
        margin-top: var(--space-8);
    }

    .pagination-dot {
        width: 10px;
        height: 10px;
    }

    .pagination-dot.active {
        width: 24px;
    }

    /* Footer adjustments */
    .recommendation-footer {
        flex-direction: column;
        gap: var(--space-2);
        align-items: flex-start;
    }

    .linkedin-badge {
        font-size: 10px;
    }

    .linkedin-badge i {
        font-size: 16px;
    }
}

/* Large Tablets / Small Desktops (1024px - 1279px) */
@media (min-width: 1024px) and (max-width: 1279px) {
    .testimonial-card {
        flex: 0 0 calc(33.333% - var(--space-4));
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    }

    /* Navigation arrows positioning for medium desktops */
    section#recommendations button[style*="left"] {
        left: -15px !important;
    }

    section#recommendations button[style*="right"] {
        right: -15px !important;
    }
}

/* Ensure proper navigation arrows on all desktop sizes */
@media (min-width: 1280px) {
    section#recommendations button[style*="left"] {
        left: -20px !important;
    }

    section#recommendations button[style*="right"] {
        right: -20px !important;
    }
}

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

@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;
    }
}

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

/*-----------------------------------------------------------------
  ACADEMIC TIMELINE - Beautiful Vertical Timeline
-----------------------------------------------------------------*/
.academic-timeline {
    position: relative;
    padding: var(--space-8) 0;
}

.academic-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-neural);
    transform: translateX(-50%);
    border-radius: var(--radius-full);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-16);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-8);
    align-items: center;
}

.timeline-marker {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.timeline-dot {
    width: 24px;
    height: 24px;
    background: var(--gradient-neural);
    border-radius: 50%;
    border: 4px solid var(--bg-primary);
    box-shadow: 0 0 0 4px var(--border-color), var(--shadow-glow);
    position: relative;
    z-index: 2;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% {
        box-shadow: 0 0 0 4px var(--border-color), 0 0 15px rgba(99, 102, 241, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px var(--border-color), 0 0 25px rgba(99, 102, 241, 0.6);
    }
}

.timeline-period {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, calc(-100% - var(--space-8)));
    background: var(--gradient-neural);
    color: white;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
    box-shadow: var(--shadow-lg);
}

.timeline-content {
    position: relative;
}

.timeline-item-left .timeline-content {
    grid-column: 1;
}

.timeline-item-right .timeline-content {
    grid-column: 3;
}

/* Mobile timeline */
@media (max-width: 768px) {
    .academic-timeline::before {
        left: 20px;
    }

    .timeline-item {
        grid-template-columns: auto 1fr;
        gap: var(--space-4);
    }

    .timeline-marker {
        grid-column: 1;
        grid-row: 1;
    }

    .timeline-content {
        grid-column: 2 !important;
        grid-row: 1;
    }

    .timeline-period {
        position: static;
        transform: none;
        margin-top: var(--space-2);
    }
}

/*-----------------------------------------------------------------
  CERTIFICATIONS - Premium Badge Cards
-----------------------------------------------------------------*/
.cert-card .card {
    position: relative;
    overflow: visible;
}

.cert-card .card::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-neural);
    border-radius: var(--radius-2xl);
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-base);
}

.cert-card:hover .card::before {
    opacity: 1;
}

.cert-card:hover .card {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-2xl), var(--shadow-glow-lg);
}

/*-----------------------------------------------------------------
  RECOMMENDATIONS - Professional LinkedIn-Style Cards
-----------------------------------------------------------------*/
.recommendations-section {
    background: var(--bg-secondary);
    position: relative;
    overflow: visible;
    padding: var(--space-24) 0 !important;
}

.recommendations-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-mesh);
    opacity: 0.2;
    pointer-events: none;
}

.recommendations-section .container {
    position: relative;
    z-index: 1;
    padding-left: 60px;
    padding-right: 60px;
}

.recommendations-carousel {
    position: relative;
    overflow: visible;
    padding: 0 20px;
}

.recommendations-track {
    display: flex;
    gap: var(--space-6);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    align-items: stretch;
    overflow: visible !important;
    width: 100%;
}

.recommendation-card {
    position: relative;
    align-self: stretch;
    display: flex;
    overflow: visible !important;
    /* Let Vue.js handle flex sizing via inline styles */
}

.recommendation-card-inner {
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-6) var(--space-6) var(--space-5);
    min-height: 340px;
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    width: 100%;
    box-sizing: border-box;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.03);
}

body.dark .recommendation-card-inner {
    background: rgba(22, 22, 22, 0.95);
    border-color: rgba(255, 255, 255, 0.06);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.recommendation-card:hover .recommendation-card-inner {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 60px rgba(0, 255, 200, 0.12),
                0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: rgba(0, 255, 200, 0.4);
}

body.dark .recommendation-card:hover .recommendation-card-inner {
    box-shadow: 0 20px 60px rgba(0, 255, 200, 0.08),
                0 8px 24px rgba(0, 0, 0, 0.4);
    border-color: rgba(0, 255, 200, 0.5);
}

/* Header Section */
.recommendation-header {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
    flex-shrink: 0;
    padding-top: var(--space-3);
}

.recommendation-avatar-wrapper {
    position: relative;
    flex-shrink: 0;
}

.recommendation-avatar {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    object-fit: cover;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 3px solid var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 255, 200, 0.2);
}

.recommendation-card:hover .recommendation-avatar {
    transform: scale(1.1);
    box-shadow: 0 8px 24px rgba(0, 255, 200, 0.3);
}

.recommendation-meta {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
}

.recommendation-meta i {
    color: #fbbf24;
    font-size: 14px;
}

/* Navigation Buttons */
.recommendation-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--gradient-neural);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: white;
    font-size: var(--font-size-lg);
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(0, 255, 200, 0.3),
                0 2px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

body.dark .recommendation-nav-btn {
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 16px rgba(0, 255, 200, 0.4),
                0 2px 8px rgba(0, 0, 0, 0.2);
}

.recommendation-nav-btn:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 24px rgba(0, 255, 200, 0.5),
                0 4px 12px rgba(0, 0, 0, 0.15);
}

.recommendation-nav-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.recommendation-nav-prev {
    left: -30px;
}

.recommendation-nav-next {
    right: -30px;
}

/* Pagination Dots */
.recommendations-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-12);
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, 0.3);
    display: inline-flex;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

body.dark .recommendations-pagination {
    background: rgba(26, 26, 26, 0.7);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.pagination-dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    border: 2px solid var(--text-tertiary);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
    position: relative;
}

.pagination-dot:hover {
    border-color: var(--color-primary);
    transform: scale(1.2);
    background: rgba(0, 255, 200, 0.15);
}

.pagination-dot.active {
    background: var(--gradient-neural);
    border-color: var(--color-primary);
    width: 36px;
    border-radius: var(--radius-full);
    box-shadow: 0 0 12px rgba(0, 255, 200, 0.4),
                inset 0 0 6px rgba(255, 255, 255, 0.2);
}

/*-----------------------------------------------------------------
  ENHANCED GLASSMORPHISM
-----------------------------------------------------------------*/
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.dark .glass-effect {
    background: rgba(30, 41, 59, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/*-----------------------------------------------------------------
  ANIMATED COUNTER - For Stats
-----------------------------------------------------------------*/
.stat-counter {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    background: var(--gradient-neural);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    animation: countUp 2s ease-out;
}

@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/*-----------------------------------------------------------------
  PROGRESS BARS - Animated
-----------------------------------------------------------------*/
.progress-bar-animated {
    position: relative;
    overflow: hidden;
}

.progress-bar-animated::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    to {
        left: 100%;
    }
}

/*-----------------------------------------------------------------
  ENHANCED HOVER EFFECTS
-----------------------------------------------------------------*/
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.hover-glow {
    transition: all var(--transition-base);
}

.hover-glow:hover {
    box-shadow: var(--shadow-glow-lg);
}

.hover-scale {
    transition: transform var(--transition-base);
}

.hover-scale:hover {
    transform: scale(1.05);
}

/*-----------------------------------------------------------------
  GRADIENT BORDERS
-----------------------------------------------------------------*/
.gradient-border {
    position: relative;
    border-radius: var(--radius-xl);
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-neural);
    border-radius: var(--radius-xl);
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.gradient-border:hover::before {
    opacity: 1;
}

/*-----------------------------------------------------------------
  PARTICLE EFFECTS - Subtle Background Animation
-----------------------------------------------------------------*/
.particle-container {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float-particle 20s infinite;
}

@keyframes float-particle {
    0%, 100% {
        transform: translate(0, 0);
    }
    25% {
        transform: translate(100px, -100px);
    }
    50% {
        transform: translate(200px, 0);
    }
    75% {
        transform: translate(100px, 100px);
    }
}

/*-----------------------------------------------------------------
  SMOOTH SCROLL INDICATORS
-----------------------------------------------------------------*/
.scroll-indicator {
    position: fixed;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 48px;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-full);
    display: flex;
    justify-content: center;
    padding-top: var(--space-2);
    animation: bounce 2s infinite;
}

.scroll-indicator::before {
    content: '';
    width: 6px;
    height: 10px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    animation: scroll-dot 2s infinite;
}

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

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

/*-----------------------------------------------------------------
  MODERN UX/UI ENHANCEMENTS
-----------------------------------------------------------------*/

/* Smooth Animations & Transitions */
* {
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Enhanced Button Interactions */
.btn, button {
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
    will-change: transform;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 255, 200, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-2px);
}

/* Card Hover Effects */
.project-card,
.skill-card,
.experience-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform, box-shadow;
}

.project-card:hover,
.skill-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.dark .project-card:hover,
.dark .skill-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Loading States */
.loading-skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 0%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Scroll Progress Indicator */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--gradient-neural);
    z-index: calc(var(--z-fixed) + 1);
    transform-origin: left;
    transition: width 0.1s ease-out;
    will-change: width;
}

/* Hide scroll progress on mobile to save space */
@media (max-width: 767px) {
    .scroll-progress {
        height: 2px;
    }
}

/* Smooth Reveal Animations with Intersection Observer */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Performance: Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* Stagger Animation for Grids */
.reveal:nth-child(1) { transition-delay: 0.1s; }
.reveal:nth-child(2) { transition-delay: 0.2s; }
.reveal:nth-child(3) { transition-delay: 0.3s; }
.reveal:nth-child(4) { transition-delay: 0.4s; }
.reveal:nth-child(5) { transition-delay: 0.5s; }
.reveal:nth-child(6) { transition-delay: 0.6s; }

/* Micro-interactions */
.nav-link {
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-neural);
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* Focus States for Accessibility */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

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

/* Skip to Content Link (Accessibility) */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: var(--text-inverse);
    padding: var(--space-3) var(--space-5);
    z-index: var(--z-modal);
    text-decoration: none;
    border-radius: 0 0 var(--radius-md) 0;
    transition: top 0.3s ease;
}

.skip-to-content:focus {
    top: 0;
}

/* Enhanced Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gradient-neural);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* Print Optimizations */
@media print {
    .navbar,
    .footer,
    .btn,
    .mobile-menu-btn,
    .back-to-top {
        display: none !important;
    }
    
    .section {
        page-break-inside: avoid;
    }
    
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
}

/*-----------------------------------------------------------------
  RESPONSIVE ENHANCEMENTS
-----------------------------------------------------------------*/
@media (max-width: 768px) {
    .hero-cta {
        flex-direction: column;
        width: 100%;
        gap: var(--space-3);
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
        min-height: 48px;
    }

    .cert-card {
        max-width: 100%;
    }

    .recommendation-card {
        margin-bottom: var(--space-4);
    }
    
    /* Disable hover effects on touch devices */
    @media (hover: none) {
        .project-card:hover,
        .skill-card:hover {
            transform: none;
        }
    }
}

/*-----------------------------------------------------------------
  PERFORMANCE OPTIMIZATIONS
-----------------------------------------------------------------*/

/* GPU Acceleration for Smooth Animations */
.project-card,
.skill-card,
.experience-card,
.btn {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Image Optimization - Use loading="lazy" and decoding="async" in HTML */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Reduce Repaints */
.navbar,
.scroll-progress {
    contain: layout style paint;
}

/*-----------------------------------------------------------------
  TOUCH DEVICE OPTIMIZATIONS
-----------------------------------------------------------------*/

/* Better touch targets for mobile */
@media (hover: none) and (pointer: coarse) {
    .nav-link,
    .btn,
    button {
        min-height: 44px;
        min-width: 44px;
        padding: var(--space-3) var(--space-5);
    }
    
    /* Remove hover effects on touch devices */
    .project-card:hover,
    .skill-card:hover {
        transform: none;
        box-shadow: var(--shadow-lg);
    }
    
    /* Larger tap targets */
    .mobile-nav .nav-link {
        min-height: 52px;
        padding: var(--space-4) var(--space-6);
    }
}

/*-----------------------------------------------------------------
  LANDSCAPE ORIENTATION OPTIMIZATIONS
-----------------------------------------------------------------*/
@media (max-width: 1024px) and (orientation: landscape) {
    .section-hero {
        min-height: auto;
        padding: var(--space-16) 0;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .navbar-content {
        padding: var(--space-2) 0;
    }
}

/*-----------------------------------------------------------------
  HIGH DPI / RETINA DISPLAY OPTIMIZATIONS
-----------------------------------------------------------------*/
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .skill-icon,
    .project-card img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/*-----------------------------------------------------------------
  PRINT STYLES
-----------------------------------------------------------------*/
@media print {
    .navbar, 
    .footer, 
    .btn,
    .mobile-menu-btn,
    .back-to-top,
    .scroll-progress {
        display: none !important;
    }
    
    .section {
        page-break-inside: avoid;
        padding: var(--space-8) 0;
    }

    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    a[href^="http"]:after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}