/**
 * Modern Portfolio Stylesheet
 * 
 * A comprehensive, accessible stylesheet for a modern developer portfolio
 * featuring:
 * - Dual theme support (light/dark mode)
 * - Golden color palette with proper contrast ratios
 * - Responsive design for all devices
 * - Semantic color tokens and design system
 * - CSS custom properties for maintainability
 * - Accessibility-first approach (AA/AAA compliant)
 * 
 * @author Saleh Salem Alhaddad
 * @version 2.0.0
 * @license MIT
 */

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

/* ===== CSS RESET ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* =============================================================================
   GOLDEN DUAL-THEME COLOR SYSTEM
   ============================================================================= */

/* ===== GOLDEN DUAL-THEME COLOR SYSTEM ===== */
:root {
  /* === BRAND COLORS === */
  /* Golden Primary Palette - Dark Theme Optimized */
  --color-primary-50: #fffbeb;
  --color-primary-100: #fef3c7;
  --color-primary-200: #fde68a;
  --color-primary-300: #fcd34d;
  --color-primary-400: #fbbf24;
  --color-primary-500: #f59e0b;  /* Main golden */
  --color-primary-600: #d97706;
  --color-primary-700: #b45309;
  --color-primary-800: #92400e;
  --color-primary-900: #78350f;
  
  /* === NEUTRAL COLORS === */
  /* Dark Theme Neutral Palette */
  --color-neutral-50: #f8fafc;
  --color-neutral-100: #f1f5f9;
  --color-neutral-200: #e2e8f0;
  --color-neutral-300: #cbd5e1;
  --color-neutral-400: #94a3b8;
  --color-neutral-500: #64748b;
  --color-neutral-600: #475569;
  --color-neutral-700: #334155;
  --color-neutral-800: #1e293b;
  --color-neutral-900: #0f172a;
  --color-neutral-950: #020617;
  
  /* === SEMANTIC TOKENS - DARK THEME === */
  /* Primary Brand Colors */
  --primary-color: var(--color-primary-400);        /* Golden accent */
  --primary-hover: var(--color-primary-300);        /* Lighter on hover */
  --primary-active: var(--color-primary-500);       /* Darker when active */
  --primary-disabled: var(--color-primary-700);     /* Muted when disabled */
  
  /* Background System */
  --bg-primary: var(--color-neutral-950);           /* Main background */
  --bg-secondary: var(--color-neutral-900);         /* Elevated surfaces */
  --bg-tertiary: var(--color-neutral-800);          /* Cards, panels */
  --card-bg: var(--color-neutral-800);              /* Card backgrounds */
  --surface-elevated: var(--color-neutral-700);     /* Elevated elements */
  
  /* Text Hierarchy */
  --text-primary: var(--color-neutral-50);          /* High emphasis text */
  --text-secondary: var(--color-neutral-300);       /* Medium emphasis */
  --text-tertiary: var(--color-neutral-500);        /* Low emphasis */
  --text-disabled: var(--color-neutral-600);        /* Disabled text */
  --text-on-primary: var(--color-neutral-950);      /* Text on golden bg */
  
  /* Interactive States */
  --interactive-primary: var(--color-primary-400);
  --interactive-hover: var(--color-primary-300);
  --interactive-active: var(--color-primary-500);
  --interactive-focus: var(--color-primary-200);
  
  /* Border & Divider Colors */
  --border-subtle: var(--color-neutral-800);
  --border-default: var(--color-neutral-700);
  --border-strong: var(--color-neutral-600);
  --border-primary: var(--color-primary-400);
  
  /* Legacy Support (maintain existing variable names) */
  --secondary-color: var(--color-neutral-400);
  --accent-color: var(--color-primary-400);
  --bg-light: var(--color-neutral-50);
  --bg-surface: var(--color-neutral-100);
  --text-light: var(--color-primary-400);
  --text-dark: var(--color-neutral-800);
  --text-darker: var(--color-neutral-900);
  
  /* Shadow System */
  --shadow-color: 0 0 0;
  --shadow-primary: var(--color-primary-400);
  --shadow-glow: 0 0 20px rgba(245, 158, 11, 0.25);
  
  /* Navigation */
  --nav-height: 80px;
  --nav-bg: rgba(2, 6, 23, 0.95);
  
  /* Standard Shadows */
  --shadow-sm: 0 1px 3px rgba(var(--shadow-color), 0.12), 0 1px 2px rgba(var(--shadow-color), 0.24);
  --shadow-md: 0 4px 6px rgba(var(--shadow-color), 0.15), 0 2px 4px rgba(var(--shadow-color), 0.10);
  --shadow-lg: 0 10px 15px rgba(var(--shadow-color), 0.20), 0 4px 6px rgba(var(--shadow-color), 0.15);
  --shadow-xl: 0 20px 25px rgba(var(--shadow-color), 0.25), 0 10px 10px rgba(var(--shadow-color), 0.20);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Border Radius */
  --border-radius-sm: 0.25rem;
  --border-radius: 0.375rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  --border-radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Layout */
  --max-width: 1200px;
  --max-width-sm: 640px;
  --max-width-md: 768px;
  --max-width-lg: 1024px;
  --max-width-xl: 1280px;
}

/* === LIGHT THEME OVERRIDES === */
[data-theme="light"] {
  /* === SEMANTIC TOKENS - LIGHT THEME === */
  /* Primary Brand Colors - Darker golden for better contrast on light */
  --primary-color: var(--color-primary-600);        /* Darker golden for contrast */
  --primary-hover: var(--color-primary-700);        /* Even darker on hover */
  --primary-active: var(--color-primary-800);       /* Darkest when active */
  --primary-disabled: var(--color-primary-300);     /* Light when disabled */
  
  /* Background System - Light Mode */
  --bg-primary: var(--color-neutral-50);            /* Clean white background */
  --bg-secondary: var(--color-neutral-100);         /* Subtle gray surfaces */
  --bg-tertiary: var(--color-neutral-200);          /* Elevated elements */
  --card-bg: var(--color-neutral-50);               /* Card backgrounds */
  --surface-elevated: var(--color-neutral-100);     /* Elevated surfaces */
  
  /* Text Hierarchy - Light Mode */
  --text-primary: var(--color-neutral-900);         /* High contrast text */
  --text-secondary: var(--color-neutral-600);       /* Medium emphasis */
  --text-tertiary: var(--color-neutral-500);        /* Low emphasis */
  --text-disabled: var(--color-neutral-400);        /* Disabled text */
  --text-on-primary: var(--color-neutral-50);       /* White text on golden bg */
  
  /* Interactive States - Light Mode */
  --interactive-primary: var(--color-primary-600);
  --interactive-hover: var(--color-primary-700);
  --interactive-active: var(--color-primary-800);
  --interactive-focus: var(--color-primary-500);
  
  /* Border & Divider Colors - Light Mode */
  --border-subtle: var(--color-neutral-200);
  --border-default: var(--color-neutral-300);
  --border-strong: var(--color-neutral-400);
  --border-primary: var(--color-primary-600);
  
  /* Shadow System - Light Mode */
  --shadow-color: 0 0 0;
  --shadow-glow: 0 0 20px rgba(217, 119, 6, 0.15);
  
  /* Navigation - Light Mode */
  --nav-bg: rgba(248, 250, 252, 0.95);
  
  /* Legacy Support - Light Mode */
  --secondary-color: var(--color-neutral-600);
  --accent-color: var(--color-primary-600);
  --bg-light: var(--color-neutral-50);
  --bg-surface: var(--color-neutral-100);
  --text-light: var(--color-primary-600);
  --text-dark: var(--color-neutral-800);
  --text-darker: var(--color-neutral-900);
}

/* ===== BASE STYLES ===== */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

body.nav-open {
  overflow: hidden;
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity var(--transition-normal);
}

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

.loading-logo {
  font-size: var(--text-5xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: var(--space-4);
  animation: pulse 2s infinite;
}

.loading-text {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  animation: fadeInOut 2s infinite;
}

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

@keyframes fadeInOut {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ===== NAVIGATION ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  transition: transform var(--transition-normal), background-color var(--transition-normal);
}

.header-hidden {
  transform: translateY(-100%);
}

.header-scrolled {
  box-shadow: var(--shadow-lg);
}

.nav {
  height: 100%;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-8);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.nav-logo:hover {
  transform: translateY(-2px);
}

.logo-container {
  display: flex;
  flex-direction: column;
}

.logo-text {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  line-height: 1;
}

.logo-subtitle {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--border-radius);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: var(--primary-color);
  border-radius: 50%;
}

.nav-number {
  color: var(--primary-color);
  font-size: var(--text-xs);
}

.resume-link {
  background: transparent;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.resume-link:hover {
  background: rgba(var(--primary-color) / 0.1);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 50px;
  height: 24px;
  background: var(--bg-tertiary);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.theme-toggle-track {
  width: 100%;
  height: 100%;
  position: relative;
}

.theme-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: var(--primary-color);
  border-radius: 50%;
  transition: transform var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

[data-theme="dark"] .theme-toggle-thumb {
  transform: translateX(26px);
}

[data-theme="light"] .theme-toggle-thumb {
  transform: translateX(0px);
}

.theme-toggle i {
  font-size: 10px;
  color: var(--bg-primary);
}

.light-icon {
  display: block;
}

.dark-icon {
  display: none;
}

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

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

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

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

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  z-index: 1001;
  position: relative;
  width: 30px;
  height: 30px;
  justify-content: center;
  align-items: center;
}

.nav-toggle:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.nav-toggle .bar {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 2px 0;
  transition: 0.3s;
  border-radius: 2px;
  display: block;
}

/* Hamburger animation */
.nav-toggle.active .bar:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

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

.nav-toggle.active .bar:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

/* Mobile Navigation Responsive Styles */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6) var(--space-8);
    gap: var(--space-4);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-item {
    width: 100%;
  }
  
  .nav-link {
    width: 100%;
    padding: var(--space-3) 0;
    text-align: left;
    justify-content: flex-start;
    border-bottom: 1px solid var(--border-subtle);
  }
  
  .nav-link:last-child {
    border-bottom: none;
  }
}

/* =============================================================================
   SOCIAL SIDEBAR COMPONENT
   ============================================================================= */

/* ===== SOCIAL SIDEBAR ===== */
.social-sidebar {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  transition: all var(--transition-standard);
}

.social-sidebar.left {
  left: var(--space-6);
}

.social-sidebar.right {
  right: var(--space-6);
}

.social-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.social-sidebar a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-standard);
  position: relative;
  overflow: hidden;
}

.social-sidebar a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  transition: left var(--transition-standard);
  opacity: 0.1;
}

.social-sidebar a:hover::before {
  left: 100%;
}

.social-sidebar a:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.social-sidebar a i {
  font-size: var(--font-size-md);
  z-index: 1;
  position: relative;
}

/* Social Sidebar Responsive */
@media (max-width: 1024px) {
  .social-sidebar {
    display: none;
  }
}

/* Hero Actions Responsive Styles */
/* Desktop: Horizontal layout */
.hero-actions,
.cta-buttons {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  justify-content: flex-start;
  margin-top: var(--space-8);
  flex-wrap: wrap;
}

/* Mobile: Vertical layout */
@media (max-width: 768px) {
  .hero-actions,
  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  
  .hero-actions .btn,
  .cta-buttons .btn {
    width: 100%;
    margin: 0;
    text-align: center;
  }
}

/* ===== MAIN CONTENT & CONTAINER SYSTEM ===== */
.main {
  min-height: 100vh;
  padding-top: var(--nav-height);
}

/* Primary container for centering and max-width control */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-8);
  width: 100%;
}

/* Content wrapper for additional spacing control */
.content-wrapper {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Section spacing and layout */
.section {
  padding: var(--space-20) 0;
  margin: 0 auto;
  position: relative;
}

/* Section variants */
.section-alt {
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  margin: var(--space-16) 0;
  padding: var(--space-20) 0;
}

.section-tight {
  padding: var(--space-16) 0;
}

.section-loose {
  padding: var(--space-32) 0;
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  padding: var(--space-20) 0;
  position: relative;
  margin-bottom: var(--space-16);
}

.hero .container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  width: 100%;
}

.hero-text {
  max-width: 600px;
  padding-right: var(--space-8);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--primary-color);
  margin-bottom: var(--space-6);
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.1s;
}

.hero-name,
.hero-title {
  font-size: clamp(var(--text-3xl), 6vw, var(--text-6xl));
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  margin-bottom: var(--space-6);
  color: var(--text-primary);
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.3s;
}

.hero-description {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  max-width: 540px;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.5s;
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.7s;
}

.hero-subtitle {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  line-height: 1.2;
  margin-bottom: var(--space-6);
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.4s;
}

.hero-description {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-12);
  max-width: 540px;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.4s;
}

.hero-cta {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.5s;
}

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

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

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

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

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

.btn-secondary:hover {
  background: rgba(136, 146, 176, 0.1);
  border-color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-accent:hover {
  background: rgba(255, 215, 0, 0.1);
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(255, 215, 0, 0.2);
}

/* ===== CARDS ===== */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--bg-tertiary);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

/* ===== SECTIONS ===== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--space-4);
}

.section-header h2 {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto;
}

/* Grid and flex layouts with proper spacing */
.content-grid {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-12);
}

.content-grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.content-grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.content-flex {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
  align-items: flex-start;
}

/* Card layouts with proper spacing */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-12);
}

.card {
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-md);
}

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

.card-header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--primary-color);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.card-content {
  line-height: 1.6;
  color: var(--text-secondary);
}

.card-content p {
  margin-bottom: var(--space-4);
}

.card-content p:last-child {
  margin-bottom: 0;
}

/* About preview section */
.about-preview {
  padding: var(--space-20) 0;
  background: var(--bg-secondary);
  margin: var(--space-16) 0;
  border-radius: var(--border-radius-2xl);
}

.about-preview .container {
  max-width: var(--max-width-lg);
}

.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-16);
  align-items: start;
  margin-top: var(--space-12);
}

.about-text {
  padding-right: var(--space-8);
}

.about-text p {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.highlights {
  display: flex;
  gap: var(--space-8);
  margin: var(--space-8) 0;
  padding: var(--space-6) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.highlight-item {
  text-align: center;
  flex: 1;
}

.highlight-number {
  display: block;
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: var(--space-2);
}

.highlight-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== HIGHLIGHTS GRID SECTION ===== */
.highlights-section {
  padding: var(--space-24) 0;
  background: var(--bg-primary);
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.highlight-card {
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.highlight-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-xl);
}

.highlight-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.highlight-header .highlight-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.highlight-header .highlight-icon i {
  color: var(--bg-primary);
  font-size: var(--text-base);
}

.highlight-header h3 {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-lg);
  margin: 0;
}

.highlight-description {
  flex: 1;
}

.highlight-description p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 768px) {
  .highlights-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .highlight-header {
    gap: var(--space-3);
  }
  
  .highlight-header .highlight-icon {
    width: 35px;
    height: 35px;
  }
  
  .highlight-header h3 {
    font-size: var(--text-base);
  }
}

.about-skills h3 {
  font-size: var(--text-xl);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.skill-tag {
  background: var(--primary-color);
  color: var(--bg-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--border-radius);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  transition: var(--transition-normal);
}

.skill-tag:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

/* ===== PROFESSIONAL OVERVIEW SECTION ===== */
.professional-overview {
  padding: var(--space-24) 0;
  background: var(--bg-primary);
  position: relative;
}

.overview-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.overview-content {
  padding-right: var(--space-8);
}

.overview-text {
  margin-bottom: var(--space-12);
}

.overview-text p {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.overview-text p:last-child {
  margin-bottom: 0;
}

.experience-highlights {
  margin-bottom: var(--space-12);
}

.experience-item {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6);
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-subtle);
  margin-bottom: var(--space-4);
  transition: all var(--transition-normal);
}

.experience-item:hover {
  transform: translateX(10px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
}

.experience-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.experience-icon i {
  color: var(--bg-primary);
  font-size: var(--text-lg);
}

.experience-details h4 {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-1);
  font-size: var(--text-lg);
}

.experience-details p {
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  line-height: 1.5;
}

.experience-duration {
  font-size: var(--text-sm);
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
  font-family: var(--font-mono);
  white-space: nowrap;
  display: inline-block;
}

.overview-cta {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}

/* Tech Showcase */
.tech-showcase {
  background: var(--card-bg);
  border-radius: var(--border-radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--border-subtle);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-8));
}

.tech-showcase h3 {
  color: var(--text-primary);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-8);
  text-align: center;
  position: relative;
}

.tech-showcase h3::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: var(--primary-color);
  border-radius: 1px;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: rgba(var(--primary-color) / 0.05);
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
  text-align: center;
}

.tech-item:hover {
  background: rgba(var(--primary-color) / 0.1);
  transform: translateY(-5px);
}

.tech-item .tech-icon {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.tech-item span {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
}

/* ===== FEATURED WORK SECTION ===== */
.featured-work {
  padding: var(--space-24) 0;
  background: var(--bg-secondary);
  margin: var(--space-20) 0;
  border-radius: var(--border-radius-2xl);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-16);
}

.work-item {
  background: var(--card-bg);
  border-radius: var(--border-radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.work-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow);
  border-color: var(--primary-color);
}

.work-image {
  margin-bottom: var(--space-6);
  display: flex;
  justify-content: center;
}

.work-placeholder {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  color: var(--bg-primary);
  box-shadow: var(--shadow-lg);
}

.work-content h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.work-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.work-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.work-tech span {
  font-size: var(--text-xs);
  color: var(--primary-color);
  background: rgba(var(--primary-color) / 0.1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--border-radius);
  font-weight: var(--font-weight-medium);
  border: 1px solid var(--border-primary);
}

/* ===== LATEST ARTICLES SECTION ===== */
.latest-articles {
  padding: var(--space-24) 0;
  background: var(--bg-primary);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-16);
}

.article-card {
  background: var(--card-bg);
  border-radius: var(--border-radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow);
  border-color: var(--primary-color);
}

.article-meta {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.article-date,
.article-category {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--border-radius);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-date {
  background: rgba(var(--primary-color) / 0.1);
  color: var(--primary-color);
  border: 1px solid var(--border-primary);
}

.article-category {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.article-card h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.article-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.article-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

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

.section-cta {
  text-align: center;
  margin-top: var(--space-16);
}

/* ===== GITHUB STATS SECTION ===== */
.github-stats {
  padding: var(--space-20) 0;
  background: var(--bg-secondary);
  margin: var(--space-20) 0;
  border-radius: var(--border-radius-2xl);
}

.stats-content {
  display: flex;
  justify-content: center;
  margin-top: var(--space-12);
}

.github-streak img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-normal);
}

.github-streak:hover img {
  transform: scale(1.02);
}


/* ===== CONTACT PAGE UI/UX IMPROVEMENTS ===== */
.contact-cta {
  padding: var(--space-24) 0;
  background: var(--bg-primary);
  text-align: center;
  border-radius: var(--border-radius-2xl);
  box-shadow: var(--shadow-lg);
  margin: var(--space-20) 0;
}

.cta-content {
  max-width: 520px;
  margin: 0 auto;
  background: var(--card-bg);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--space-12) var(--space-8);
  border: 1px solid rgba(100,255,218,0.12);
}

.cta-content h2 {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: var(--space-6);
  line-height: 1.2;
  letter-spacing: 0.5px;
}

.cta-content p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-12);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.cta-form input,
.cta-form textarea {
  width: 100%;
  padding: var(--space-4);
  border-radius: var(--border-radius);
  border: 1px solid var(--bg-tertiary);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: var(--text-base);
  font-family: var(--font-family);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.cta-form input:focus,
.cta-form textarea:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px var(--interactive-focus);
}

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

.cta-form label {
  text-align: left;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
  font-weight: var(--font-weight-medium);
}

.cta-form .form-row {
  display: flex;
  gap: var(--space-6);
}

@media (max-width: 600px) {
  .cta-content {
    padding: var(--space-6) var(--space-2);
  }
  .cta-form .form-row {
    flex-direction: column;
    gap: var(--space-4);
  }
}

.cta-buttons {
  display: flex;
  gap: var(--space-6);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.cta-buttons .btn {
  min-width: 140px;
  font-size: var(--text-base);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--border-radius-lg);
}

.cta-buttons .btn-primary {
  background: var(--primary-color);
  color: var(--bg-primary);
  border: 1px solid var(--primary-color);
  box-shadow: var(--shadow-glow);
}

.cta-buttons .btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  box-shadow: 0 0 0 4px rgba(100,255,218,0.10);
}

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

.cta-buttons .btn-secondary:hover {
  background: rgba(100,255,218,0.08);
  color: var(--bg-primary);
}

/* ===== OPEN SOURCE CONTRIBUTIONS SECTION ===== */
.contribution-highlight {
  margin-top: 2rem;
}

.contribution-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.contribution-name {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contribution-link {
  color: var(--primary-color);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.3s ease;
}

.contribution-link:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}

.contribution-link i {
  font-size: 0.9rem;
  opacity: 0.8;
}

.contribution-badge {
  background: linear-gradient(135deg, #28a745, #20c997);
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 4px rgba(40, 167, 69, 0.3);
}

.contribution-pr-title {
  color: var(--text-secondary);
  font-size: 1.1rem;
  font-weight: 500;
  margin: 0 0 1rem 0;
  font-style: italic;
}

.contribution-description {
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.contribution-description code {
  background: var(--code-bg, #f8f9fa);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.9em;
  color: var(--primary-color);
  border: 1px solid var(--border-color, #e9ecef);
}

.contribution-details {
  border-top: 1px solid var(--border-color, #e9ecef);
  padding-top: 1.5rem;
}

.contribution-impact h5 {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.8rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.contribution-impact h5:before {
  content: "⚡";
  font-size: 1.1rem;
}

.contribution-impact ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem 0;
}

.contribution-impact li {
  padding: 0.4rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-secondary);
  line-height: 1.6;
}

.contribution-impact li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

.contribution-meta {
  margin-top: 1.5rem;
}

.contribution-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.stat-item i {
  color: var(--primary-color);
  width: 16px;
  text-align: center;
}

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

/* Responsive adjustments for contribution section */
@media (max-width: 768px) {
  .contribution-title {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .contribution-stats {
    flex-direction: column;
    gap: 0.8rem;
  }
  
  .contribution-name {
    font-size: 1.2rem;
  }
}

/* ===== RESPONSIVE IMPROVEMENTS FOR NEW SECTIONS ===== */
@media (max-width: 1024px) {
  .overview-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .overview-content {
    padding-right: 0;
  }
  
  .tech-showcase {
    position: static;
    margin-top: var(--space-8);
  }
  
  .tech-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

/* ===== FOOTER STYLES ===== */
.footer {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: auto; /* Push footer to bottom */
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    var(--primary-color) 50%, 
    transparent 100%);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

/* Footer Brand Section */
.footer-brand h3 {
  color: var(--primary-color);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-brand h3::before {
  content: '⚡';
  font-size: 1.2em;
}

.footer-bio {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-3);
}

.footer-tagline {
  color: var(--text-tertiary);
  font-size: var(--font-size-xs);
  font-style: italic;
  opacity: 0.8;
}

/* Footer Links Section */
.footer-links h4 {
  color: var(--text-primary);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-links h4::before {
  content: '🔗';
  font-size: 0.9em;
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm);
}

.footer-links a:hover {
  color: var(--primary-color);
  transform: translateX(var(--space-1));
}

.footer-links a i {
  width: 16px;
  text-align: center;
  opacity: 0.7;
}

/* Footer Social Section */
.footer-social h4 {
  color: var(--text-primary);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-social h4::before {
  content: '🌐';
  font-size: 0.9em;
}

.social-links {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-standard);
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  transition: left var(--transition-standard);
  opacity: 0.1;
}

.social-link:hover::before {
  left: 100%;
}

.social-link:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.social-link i {
  font-size: var(--font-size-md);
  z-index: 1;
  position: relative;
}

/* Footer Bottom Section */
.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-6);
  text-align: center;
}

.footer-copyright p {
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
  margin: 0;
  opacity: 0.8;
}

/* Footer Responsive Design */
@media (max-width: 768px) {
  .footer {
    padding: var(--space-12) 0 var(--space-6);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }
  
  .footer-brand {
    order: 1;
  }
  
  .footer-social {
    order: 2;
  }
  
  .footer-links {
    order: 3;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .footer-links ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
  }
  
  .footer-links li {
    margin-bottom: 0;
  }
}

@media (max-width: 480px) {
  .footer {
    padding: var(--space-8) 0 var(--space-4);
  }
  
  .footer-content {
    gap: var(--space-6);
  }
  
  .social-links {
    gap: var(--space-2);
  }
  
  .social-link {
    width: 36px;
    height: 36px;
  }
  
  .footer-links ul {
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
  }
}

/* =============================================================================
   LANGUAGES SECTION
   ============================================================================= */

/* ===== LANGUAGE CARDS ===== */
.language-card {
  text-align: center;
  padding: var(--space-8);
  background: var(--card-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: all var(--transition-standard);
  position: relative;
  overflow: hidden;
}

.language-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
  transform: scaleX(0);
  transition: transform var(--transition-standard);
}

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

.language-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  border-color: var(--border-default);
}

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

.language-flag {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  display: block;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.language-name {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin: 0;
}

.language-content {
  margin-top: var(--space-6);
}

.proficiency-level {
  margin-bottom: var(--space-4);
}

.proficiency-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: block;
  margin-bottom: var(--space-2);
}

.proficiency-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.proficiency-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  position: relative;
}

.proficiency-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(255, 255, 255, 0.3) 50%, 
    transparent 100%);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.language-description {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

/* Proficiency Level Variations */
.proficiency-level.native .proficiency-fill {
  background: linear-gradient(90deg, #22c55e, #16a34a);
}

.proficiency-level.professional .proficiency-fill {
  background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
}

/* Languages Section Responsive */
@media (max-width: 768px) {
  .language-card {
    padding: var(--space-6);
  }
  
  .language-flag {
    font-size: 2.5rem;
  }
  
  .language-name {
    font-size: var(--font-size-lg);
  }
}

@media (max-width: 480px) {
  .language-flag {
    font-size: 2rem;
  }
}

/* =============================================================================
   ARTICLES PAGE STYLES
   ============================================================================= */

/* ===== ARTICLE GRID & CATEGORIES ===== */
.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

.article-category {
  background: var(--card-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-standard);
  position: relative;
  overflow: hidden;
}

.article-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
  transform: scaleX(0);
  transition: transform var(--transition-standard);
}

.article-category:hover::before {
  transform: scaleX(1);
}

.article-category:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border-color: var(--border-default);
}

.article-category-header {
  margin-bottom: var(--space-6);
  text-align: center;
}

.article-category-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.article-list {
  display: grid;
  gap: var(--space-8);
}

/* ===== ARTICLE ITEMS ===== */
.article-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: all var(--transition-fast);
  position: relative;
}

.article-item:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-default);
  transform: translateX(var(--space-1));
}

.article-header {
  margin-bottom: var(--space-4);
}

.article-title {
  margin: 0 0 var(--space-3) 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

.article-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.article-title a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width var(--transition-standard);
}

.article-title a:hover {
  color: var(--primary-color);
}

.article-title a:hover::after {
  width: 100%;
}

.article-meta {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.article-meta strong {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
}

.article-content {
  margin-top: var(--space-4);
}

.article-description {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin: 0 0 var(--space-4) 0;
}

.article-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-tertiary);
  color: var(--primary-color);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.article-link:hover {
  background: var(--primary-color);
  color: var(--text-on-primary);
  border-color: var(--primary-color);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(245, 158, 11, 0.3);
}

/* ===== ARTICLE TAGS ===== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.article-tag {
  padding: var(--space-1) var(--space-2);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.article-tag:hover {
  background: var(--primary-color);
  color: var(--text-on-primary);
  border-color: var(--primary-color);
}

/* Articles Page Responsive */
@media (max-width: 768px) {
  .article-category {
    padding: var(--space-6);
  }
  
  .article-item {
    padding: var(--space-4);
  }
  
  .article-category-title {
    font-size: var(--font-size-lg);
    flex-direction: column;
    gap: var(--space-1);
  }
  
  .article-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }
}

@media (max-width: 480px) {
  .article-link {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
  
  .article-tags {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .professional-overview,
  .featured-work,
  .latest-articles,
  .github-stats,
  .contact-cta {
    padding: var(--space-16) 0;
  }
}

/* =============================================================================
   CORE SKILLS SECTION
   ============================================================================= */

/* ===== SKILLS GRID ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-8);
}

.skill-category {
  background: var(--card-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-standard);
  position: relative;
  overflow: hidden;
}

.skill-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
  transform: scaleX(0);
  transition: transform var(--transition-standard);
}

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

.skill-category:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border-color: var(--border-default);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.skill-category-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-on-primary);
  font-size: var(--font-size-lg);
}

.skill-category h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin: 0;
}

.skill-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.skill-list li {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  padding-left: var(--space-4);
  position: relative;
}

.skill-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: var(--font-weight-bold);
}

.skill-list strong {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
}

/* Skills Grid Responsive */
@media (max-width: 768px) {
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  .skill-category {
    padding: var(--space-4);
  }
  
  .skill-category-header {
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }
}

/* =============================================================================
   TECHNOLOGY STACK SECTION
   ============================================================================= */

/* ===== TECHNOLOGY ICONS GRID ===== */
.tech-icons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
  justify-items: center;
}

.tech-icon-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--card-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-standard);
  position: relative;
  overflow: hidden;
  min-height: 120px;
  justify-content: center;
}

.tech-icon-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  transition: left var(--transition-standard);
  opacity: 0.1;
}

.tech-icon-item:hover::before {
  left: 100%;
}

.tech-icon-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border-color: var(--primary-color);
}

.tech-icon-img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  transition: transform var(--transition-fast);
}

.tech-icon-item:hover .tech-icon-img {
  transform: scale(1.1);
}

.tech-icon-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  text-align: center;
  transition: color var(--transition-fast);
}

.tech-icon-item:hover .tech-icon-label {
  color: var(--primary-color);
}

/* Technology Icons Responsive */
@media (max-width: 768px) {
  .tech-icons-grid {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--space-4);
  }
  
  .tech-icon-item {
    padding: var(--space-3);
    min-height: 100px;
  }
  
  .tech-icon-img {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 480px) {
  .tech-icons-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}