/* ===================================================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   Centralized design tokens for consistent theming and easy maintenance
   =================================================================== */

:root {
  /* Primary brand colors - main color palette for the portfolio */
  --color-primary: #6366f1; /* Primary brand color (indigo) */
  --color-primary-dark: #4f46e5; /* Darker variant for hover states */
  --color-secondary: #8b5cf6; /* Secondary brand color (purple) */
  --color-accent: #06b6d4; /* Accent color (cyan) for highlights */

  /* Background color system - dark theme with multiple layers */
  --color-bg-primary: #000000; /* Main background (pure black) */
  --color-bg-secondary: #0a0a0a; /* Secondary background (very dark gray) */
  --color-bg-tertiary: #111111; /* Tertiary background (dark gray) */
  --color-bg-quaternary: #1a1a1a; /* Quaternary background (lighter dark gray) */

  /* Text color hierarchy for readability and visual hierarchy */
  --color-text-primary: #ffffff; /* Primary text (white) */
  --color-text-secondary: #e5e7eb; /* Secondary text (light gray) */
  --color-text-muted: #9ca3af; /* Muted text (medium gray) */

  /* Glassmorphism effect colors for modern UI elements */
  --color-border: rgba(255, 255, 255, 0.1); /* Subtle borders */
  --color-glass: rgba(255, 255, 255, 0.02); /* Light glass effect */
  --color-glass-border: rgba(255, 255, 255, 0.1); /* Glass element borders */
  --color-glass-strong: rgba(255, 255, 255, 0.05); /* Stronger glass effect */

  /* Extended color palette for various UI states and accents */
  --color-accent-soft: #22d3ee; /* Soft accent variant */
  --color-success: #10b981; /* Success state color (green) */
  --color-warning: #f59e0b; /* Warning state color (amber) */
  --color-error: #ef4444; /* Error state color (red) */
  --color-text-accent: #a78bfa; /* Accent text color (light purple) */

  /* Gradient definitions for consistent brand gradients */
  --color-brand-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --color-brand-gradient-soft: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.1) 0%,
    rgba(139, 92, 246, 0.1) 50%,
    rgba(236, 72, 153, 0.1) 100%
  );

  /* Systematic spacing scale for consistent layout spacing */
  --space-xs: 0.25rem; /* 4px - Extra small spacing */
  --space-sm: 0.5rem; /* 8px - Small spacing */
  --space-md: 1rem; /* 16px - Medium spacing */
  --space-lg: 1.5rem; /* 24px - Large spacing */
  --space-xl: 2rem; /* 32px - Extra large spacing */
  --space-2xl: 3rem; /* 48px - 2X large spacing */
  --space-3xl: 4rem; /* 64px - 3X large spacing */
  --space-4xl: 6rem; /* 96px - 4X large spacing */

  /* Border radius system for consistent rounded corners */
  --radius-sm: 0.5rem; /* Small radius (8px) */
  --radius-md: 0.75rem; /* Medium radius (12px) */
  --radius-lg: 1rem; /* Large radius (16px) */
  --radius-full: 50%; /* Full radius for circles */

  /* Blur effects for glassmorphism and backdrop filters */
  --blur-sm: 4px; /* Small blur effect */
  --blur-md: 8px; /* Medium blur effect */
  --blur-lg: 16px; /* Large blur effect */
  --blur-xl: 24px; /* Extra large blur effect */

  /* Animation timing and easing functions for smooth interactions */
  --timing-fast: 0.15s; /* Fast transitions */
  --timing-normal: 0.3s; /* Normal transitions */
  --timing-slow: 0.5s; /* Slow transitions */
  --easing: cubic-bezier(0.4, 0, 0.2, 1); /* Smooth easing */
  --easing-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55); /* Bounce easing */

  /* Enhanced shadow system for depth and visual hierarchy */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05); /* Small shadow */
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1); /* Medium shadow */
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1); /* Large shadow */
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15); /* Extra large shadow */
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25); /* 2X large shadow */
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3); /* Glow effect */
  --shadow-glow-strong: 0 0 40px rgba(99, 102, 241, 0.5); /* Strong glow effect */
}

/* ===================================================================
   RESET AND BASE STYLES
   Foundation styles for consistent cross-browser behavior
   =================================================================== */

/* Universal box-sizing and margin/padding reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box; /* Include padding and border in element's total width/height */
}

/* HTML root element configuration */
html {
  scroll-behavior: smooth; /* Smooth scrolling for anchor links */
  overflow-x: hidden; /* Prevent horizontal scrolling */
}

/* Body element with typography and background setup */
body {
  font-family: "Poppins", sans-serif; /* Primary font family */
  background: var(--color-bg-primary); /* Dark background */
  color: var(--color-text-primary); /* White text */
  line-height: 1.6; /* Comfortable line spacing */
  overflow-x: hidden; /* Prevent horizontal overflow */
  margin: 0;
  padding: 0;
  min-height: 100vh; /* Full viewport height minimum */

  /* Improved text rendering for better readability */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Enhanced text selection styling */
::selection {
  background: rgba(99, 102, 241, 0.3); /* Semi-transparent brand color */
  color: var(--color-text-primary);
}

::-moz-selection {
  background: rgba(99, 102, 241, 0.3); /* Firefox-specific selection */
  color: var(--color-text-primary);
}

/* Custom scrollbar styling for webkit browsers */
::-webkit-scrollbar {
  width: 8px; /* Thin scrollbar width */
}

::-webkit-scrollbar-track {
  background: var(--color-bg-secondary); /* Dark track background */
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: 4px;
  transition: background var(--timing-normal);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
}

/* ===================================================================
   UTILITY CLASSES
   Reusable classes for common styling patterns
   =================================================================== */

/* Container class for consistent max-width and centering */
.container {
  max-width: 1200px; /* Maximum content width */
  margin: 0 auto; /* Center horizontally */
  padding: 0 2rem; /* Horizontal padding */
}

/* Gradient text effect utility class */
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  /* Animated gradient effect */
  background-size: 200% 200%;
  animation: gradientShift 3s ease-in-out infinite;
}

/* Gradient animation keyframes */
@keyframes gradientShift {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

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

/* Glassmorphism utility classes */
.glass {
  background: var(--color-glass);
  backdrop-filter: blur(var(--blur-md));
  border: 1px solid var(--color-glass-border);
}

.glass-strong {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(var(--blur-lg));
  border: 1px solid var(--color-glass-border);
}

/* ===================================================================
   SECTION LAYOUT
   Base styling for main content sections
   =================================================================== */

/* Base section styling with consistent spacing */
section {
  padding: 5rem 0; /* Vertical padding */
  position: relative; /* For absolute positioned children */
  overflow: hidden; /* Hide overflowing decorative elements */
  margin: 0;
  width: 100%;
}

/* First section (hero) has no top padding */
section:first-of-type {
  padding-top: 0;
  margin-top: 0;
}

/* Last section has reduced bottom padding */
section:last-of-type {
  padding-bottom: 3rem;
  margin-bottom: 0;
}

/* Section titles with consistent styling and animation */
.section-title {
  font-size: clamp(2.5rem, 5vw, 4rem); /* Responsive font size */
  font-weight: 700;
  text-align: center;
  margin-bottom: 4rem;
  position: relative;
  letter-spacing: -0.02em; /* Tight letter spacing for large text */
}

/* Animated underline for section titles */
.section-title::after {
  content: "";
  position: absolute;
  bottom: -1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
  animation: titleUnderline 2s ease-in-out infinite;
}

/* Title underline animation */
@keyframes titleUnderline {
  0%,
  100% {
    width: 80px;
    opacity: 1;
  }
  50% {
    width: 120px;
    opacity: 0.8;
  }
}

/* ===================================================================
   NAVIGATION BAR
   Fixed header with glassmorphism effect and responsive menu
   =================================================================== */

/* Main navbar container */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.9); /* Semi-transparent background */
  backdrop-filter: blur(var(--blur-lg)); /* Glassmorphism effect */
  border-bottom: 1px solid var(--color-glass-border);
  z-index: 1000; /* Above other content */
  transition: all var(--timing-normal) var(--easing);
  height: 80px; /* Fixed height */
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Navbar hover effect */
.navbar:hover {
  background: rgba(0, 0, 0, 0.95);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

/* Navbar content container */
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%; /* Full navbar height */
}

/* Brand logo section */
.nav-brand .brand-logo {
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: all var(--timing-normal) var(--easing);
}

/* Logo SVG styling */
.nav-brand .brand-logo svg {
  width: 120px;
  height: 40px;
  transition: all var(--timing-normal) var(--easing);
  filter: drop-shadow(0 2px 8px rgba(99, 102, 241, 0.3));
}

/* Logo hover effects */
.nav-brand .brand-logo:hover svg {
  transform: scale(1.05);
  filter: drop-shadow(0 4px 16px rgba(99, 102, 241, 0.5));
}

.nav-brand .brand-logo:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.6));
}

/* Animated gradient effects for logo gradients */
.nav-brand .brand-logo svg #logoGradient1 stop:first-child {
  animation: logoGradientShift1 4s ease-in-out infinite;
}

.nav-brand .brand-logo svg #logoGradient1 stop:last-child {
  animation: logoGradientShift2 4s ease-in-out infinite;
}

.nav-brand .brand-logo svg #logoGradient2 stop:first-child {
  animation: logoGradientShift3 4s ease-in-out infinite 1s;
}

.nav-brand .brand-logo svg #logoGradient2 stop:last-child {
  animation: logoGradientShift4 4s ease-in-out infinite 1s;
}

/* Logo gradient color shift animations */
@keyframes logoGradientShift1 {
  0%,
  100% {
    stop-color: #6366f1;
  }
  33% {
    stop-color: #8b5cf6;
  }
  66% {
    stop-color: #3b82f6;
  }
}

@keyframes logoGradientShift2 {
  0%,
  100% {
    stop-color: #8b5cf6;
  }
  33% {
    stop-color: #3b82f6;
  }
  66% {
    stop-color: #10b981;
  }
}

@keyframes logoGradientShift3 {
  0%,
  100% {
    stop-color: #8b5cf6;
  }
  33% {
    stop-color: #10b981;
  }
  66% {
    stop-color: #3b82f6;
  }
}

@keyframes logoGradientShift4 {
  0%,
  100% {
    stop-color: #6366f1;
  }
  33% {
    stop-color: #3b82f6;
  }
  66% {
    stop-color: #10b981;
  }
}

/* Mobile menu toggle button (hamburger) */
.nav-toggle {
  display: none; /* Hidden on desktop */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
  z-index: 1001; /* Above menu */
}

/* Shimmer effect for toggle button */
.nav-toggle::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.6s ease;
}

.nav-toggle:hover::before {
  left: 100%;
}

/* Toggle button hover state */
.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(99, 102, 241, 0.3);
  transform: scale(1.05);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.2);
}

/* Hamburger lines */
.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--color-text-primary);
  margin: 2px 0;
  transition: all var(--timing-normal) var(--easing);
  border-radius: 2px;
}

/* Hamburger line gradient effect */
.hamburger-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #8b5cf6, #3b82f6);
  border-radius: 2px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.nav-toggle:hover .hamburger-line::after {
  opacity: 1;
}

/* Active state animations (hamburger to X) */
.nav-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
  background: linear-gradient(90deg, #3b82f6, #10b981);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scale(0) rotate(180deg);
}

.nav-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
  background: linear-gradient(90deg, #3b82f6, #10b981);
}

.nav-toggle.active {
  background: rgba(60, 151, 112, 0.1);
  border-color: rgba(60, 151, 112, 0.3);
  box-shadow: 0 8px 32px rgba(60, 151, 112, 0.3);
}

/* Mobile navigation menu */
.nav-menu {
  position: fixed;
  top: 0;
  right: -100%; /* Hidden off-screen */
  width: 100%;
  height: 100vh;
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  padding: 2rem;
  transition: right 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
}

/* Active mobile menu */
.nav-menu.active {
  right: 0;
  opacity: 1;
  visibility: visible;
}

/* Menu items with staggered animation */
.nav-menu li {
  margin: 0;
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  list-style: none;
}

.nav-menu.active li {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animation delays for menu items */
.nav-menu.active li:nth-child(1) {
  transition-delay: 0.1s;
}
.nav-menu.active li:nth-child(2) {
  transition-delay: 0.2s;
}
.nav-menu.active li:nth-child(3) {
  transition-delay: 0.3s;
}
.nav-menu.active li:nth-child(4) {
  transition-delay: 0.4s;
}
.nav-menu.active li:nth-child(5) {
  transition-delay: 0.5s;
}

/* Navigation links styling */
.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 1rem 2rem;
  border-radius: var(--radius-md);
  transition: all var(--timing-normal) var(--easing);
  position: relative;
  font-weight: 500;
  letter-spacing: 0.025em;
  font-size: 1.1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  overflow: hidden;
}

/* Animated underline for nav links */
.nav-link::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6, #3b82f6);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 2px;
}

/* Shimmer effect for nav links */
.nav-link::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
  transition: left 0.6s ease;
}

/* Nav link hover effects */
.nav-link:hover {
  color: var(--color-text-primary);
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.2);
}

.nav-link:hover::before {
  width: 100%;
}

.nav-link:hover::after {
  left: 100%;
}

/* Active nav link state */
.nav-link.active {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.4);
}

.nav-link.active::before {
  width: 100%;
}

/* ===================================================================
   HERO SECTION
   Main landing area with animated background and interactive elements
   =================================================================== */

/* Hero section container */
.hero {
  min-height: 100vh; /* Full viewport height */
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  /* Complex gradient background with multiple radial gradients */
  background: radial-gradient(circle at 30% 70%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 70% 30%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 50%, var(--color-bg-tertiary) 100%);
  overflow: hidden;
  padding: 0;
}

/* Particle animation canvas */
.particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1; /* Behind content */
}

/* Hero content wrapper */
.hero-content {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  z-index: 2; /* Above particles */
  position: relative;
}

/* Hero layout grid */
.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr; /* Two equal columns */
  gap: 6rem;
  align-items: center;
  min-height: 70vh;
  max-width: 1200px;
  margin: 0 auto;
}

/* Left side: Text content */
.hero-text-side {
  text-align: left;
  max-width: 600px;
  padding-right: 2rem;
}

/* Right side: Animation container */
.hero-animation-side {
  display: flex;
  justify-content: center;
  align-items: center;
  padding-left: 2rem;
}

/* Animation container for interactive elements */
.animation-container {
  width: 400px;
  height: 400px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Floating elements container */
.floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Individual floating elements */
.floating-element {
  position: absolute;
  background: var(--color-glass);
  backdrop-filter: blur(var(--blur-md));
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  animation: floatElement 6s ease-in-out infinite;
  box-shadow: var(--shadow-lg);
}

/* Positioning for floating elements with staggered delays */
.floating-element[data-delay="0"] {
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.floating-element[data-delay="1"] {
  top: 50%;
  right: 10%;
  animation-delay: 2s;
}

.floating-element[data-delay="2"] {
  bottom: 20%;
  left: 20%;
  animation-delay: 4s;
}

/* Floating animation keyframes */
@keyframes floatElement {
  0%,
  100% {
    transform: translateY(0px) rotateX(0deg) rotateY(0deg);
  }
  25% {
    transform: translateY(-15px) rotateX(5deg) rotateY(5deg);
  }
  50% {
    transform: translateY(-8px) rotateX(0deg) rotateY(0deg);
  }
  75% {
    transform: translateY(-20px) rotateX(-5deg) rotateY(-5deg);
  }
}

/* Code block floating element */
.code-block {
  width: 80px;
  height: 60px;
}

/* Animated code lines */
.code-line {
  height: 3px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6);
  border-radius: 2px;
  margin-bottom: 6px;
  animation: codeTyping 3s ease-in-out infinite;
}

.code-line.short {
  width: 60%;
}
.code-line.medium {
  width: 80%;
}

/* Code typing animation */
@keyframes codeTyping {
  0%,
  100% {
    width: 100%;
    opacity: 1;
  }
  50% {
    width: 20%;
    opacity: 0.7;
  }
}

/* Design element floating component */
.design-element {
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

/* Design shapes with animations */
.design-circle {
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, #10b981, #3b82f6);
  border-radius: 50%;
  animation: designSpin 4s linear infinite;
}

.design-square {
  width: 16px;
  height: 16px;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  border-radius: 3px;
  animation: designSpin 4s linear infinite reverse;
}

.design-triangle {
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 14px solid #8b5cf6;
  animation: designPulse 2s ease-in-out infinite;
}

/* Design element animations */
@keyframes designSpin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes designPulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.8;
  }
}

/* Tech stack floating element */
.tech-stack {
  width: 90px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
}

/* Tech icons with bounce animation */
.tech-icon {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  animation: techBounce 2s ease-in-out infinite;
}

.tech-icon.react {
  background: linear-gradient(135deg, #61dafb, #21d4fd);
  animation-delay: 0s;
}

.tech-icon.node {
  background: linear-gradient(135deg, #68d391, #38a169);
  animation-delay: 0.3s;
}

.tech-icon.js {
  background: linear-gradient(135deg, #f7df1e, #ffcd3c);
  animation-delay: 0.6s;
}

/* Tech icon bounce animation */
@keyframes techBounce {
  0%,
  100% {
    transform: translateY(0px) scale(1);
  }
  50% {
    transform: translateY(-8px) scale(1.1);
  }
}

/* Central interactive orb */
.interactive-orb {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120px;
  height: 120px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.interactive-orb:hover {
  transform: translate(-50%, -50%) scale(1.1);
}

/* Orb core with pulsing animation */
.orb-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: radial-gradient(circle, #6366f1, #8b5cf6);
  border-radius: 50%;
  animation: orbPulse 3s ease-in-out infinite;
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.6), inset 0 0 20px rgba(255, 255, 255, 0.2);
}

/* Orb pulse animation */
@keyframes orbPulse {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.6), inset 0 0 20px rgba(255, 255, 255, 0.2);
  }
  50% {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 0 50px rgba(99, 102, 241, 0.8), inset 0 0 30px rgba(255, 255, 255, 0.3);
  }
}

/* Rotating rings around the orb */
.orb-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 2px solid rgba(99, 102, 241, 0.3);
  border-radius: 50%;
  animation: orbRotate 8s linear infinite;
}

.ring-1 {
  width: 80px;
  height: 80px;
  animation-duration: 8s;
}

.ring-2 {
  width: 100px;
  height: 100px;
  animation-duration: 12s;
  animation-direction: reverse;
}

.ring-3 {
  width: 120px;
  height: 120px;
  animation-duration: 16s;
}

/* Ring rotation animation */
@keyframes orbRotate {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* Orbiting particles around the central orb */
.orb-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.orb-particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: linear-gradient(45deg, #6366f1, #8b5cf6);
  border-radius: 50%;
  animation: particleOrbit 6s ease-in-out infinite;
}

/* Particle positioning with staggered delays */
.orb-particle:nth-child(1) {
  top: 10%;
  left: 20%;
  animation-delay: 0s;
}
.orb-particle:nth-child(2) {
  top: 30%;
  right: 15%;
  animation-delay: 1s;
}
.orb-particle:nth-child(3) {
  bottom: 25%;
  left: 25%;
  animation-delay: 2s;
}
.orb-particle:nth-child(4) {
  bottom: 40%;
  right: 20%;
  animation-delay: 3s;
}
.orb-particle:nth-child(5) {
  top: 60%;
  left: 10%;
  animation-delay: 4s;
}
.orb-particle:nth-child(6) {
  top: 20%;
  right: 30%;
  animation-delay: 5s;
}

/* Particle orbit animation */
@keyframes particleOrbit {
  0%,
  100% {
    transform: translateY(0px) translateX(0px) scale(1);
    opacity: 0.7;
  }
  25% {
    transform: translateY(-20px) translateX(15px) scale(1.2);
    opacity: 1;
  }
  50% {
    transform: translateY(-10px) translateX(-10px) scale(0.8);
    opacity: 0.8;
  }
  75% {
    transform: translateY(-25px) translateX(-5px) scale(1.1);
    opacity: 0.9;
  }
}

/* Pulse waves emanating from center */
.pulse-waves {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
  pointer-events: none;
}

.pulse-wave {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  border: 2px solid rgba(99, 102, 241, 0.2);
  border-radius: 50%;
  animation: pulseWave 4s ease-out infinite;
}

.pulse-wave:nth-child(2) {
  animation-delay: 1.3s;
}
.pulse-wave:nth-child(3) {
  animation-delay: 2.6s;
}

/* Pulse wave animation */
@keyframes pulseWave {
  0% {
    transform: translate(-50%, -50%) scale(0.3);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0;
  }
}

/* ===================================================================
   ABOUT SECTION
   Personal information and quick facts
   =================================================================== */

/* About section with gradient background */
.about {
  background: radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
    linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
}

/* About content layout */
.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  max-width: 800px;
  margin: 0 auto;
}

/* About text section */
.about-text {
  text-align: center;
  position: relative;
}

.about-text p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
}

/* Decorative accent element */
.about-accent {
  display: flex;
  justify-content: center;
}

/* Quick facts grid */
.quick-facts {
  display: grid;
  gap: 1rem;
}

/* Individual fact items with glassmorphism */
.fact-item {
  padding: 1rem;
  background: var(--color-glass);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(var(--blur-sm));
}

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

.fact-item a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--timing-normal) var(--easing);
}

.fact-item a:hover {
  color: var(--color-primary);
}

/* ===================================================================
   TOOLS SECTION
   Development tools showcase with animated background
   =================================================================== */

/* Tools section with animated background */
.tools {
  position: relative;
  background: radial-gradient(circle at 20% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
    linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-quaternary) 100%);
  overflow: hidden;
}

/* Animated background with floating shapes */
.tools-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 60%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
  animation: backgroundFloat 20s ease-in-out infinite;
}

/* Background floating animation */
@keyframes backgroundFloat {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(1deg);
  }
}

/* Decorative shapes in background */
.tools-background::before {
  content: "";
  position: absolute;
  top: 10%;
  left: 10%;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--color-primary), transparent);
  border-radius: var(--radius-full);
  opacity: 0.1;
  animation: floatShape1 15s ease-in-out infinite;
}

.tools-background::after {
  content: "";
  position: absolute;
  bottom: 20%;
  right: 15%;
  width: 150px;
  height: 150px;
  background: linear-gradient(135deg, var(--color-secondary), transparent);
  border-radius: var(--radius-lg);
  opacity: 0.1;
  animation: floatShape2 18s ease-in-out infinite reverse;
}

/* Shape floating animations */
@keyframes floatShape1 {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -20px) rotate(120deg);
  }
  66% {
    transform: translate(-20px, 30px) rotate(240deg);
  }
}

@keyframes floatShape2 {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  50% {
    transform: translate(-40px, -30px) rotate(180deg);
  }
}

/* Tools grid layout */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

/* Individual tool cards */
.tool-card {
  background: var(--color-glass-strong);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: all var(--timing-normal) var(--easing);
  cursor: pointer;
  backdrop-filter: blur(var(--blur-md));
  position: relative;
  overflow: hidden;
}

/* Tool card hover overlay */
.tool-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
  opacity: 0;
  transition: opacity var(--timing-normal) var(--easing);
}

/* Tool card hover effects */
.tool-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

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

/* Tool icons */
.tool-icon {
  margin-bottom: 1.5rem;
  transition: all var(--timing-normal) var(--easing);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.tool-card:hover .tool-icon {
  transform: scale(1.15) rotate(5deg);
  animation: iconGlow 0.8s ease-in-out;
}

/* Icon glow animation */
@keyframes iconGlow {
  0%,
  100% {
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
  }
  50% {
    filter: drop-shadow(0 8px 16px rgba(99, 102, 241, 0.4)) brightness(1.2);
  }
}

/* Tool names */
.tool-name {
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: 0.875rem;
}

/* ===================================================================
   PROJECTS SECTION
   Portfolio projects showcase
   =================================================================== */

/* Projects section background */
.projects {
  background: radial-gradient(circle at 60% 40%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
}

/* Projects grid layout */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

/* Individual project cards */
.project-card {
  background: var(--color-glass-strong);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--timing-normal) var(--easing);
  backdrop-filter: blur(var(--blur-md));
  position: relative;
}

/* Project card hover overlay */
.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.03), rgba(139, 92, 246, 0.03));
  opacity: 0;
  transition: opacity var(--timing-normal) var(--easing);
  z-index: 1;
}

/* Project card hover effects */
.project-card:hover {
  transform: translateY(-12px) scale(1.02);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

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

/* Project image placeholder */
.project-image {
  height: 200px;
  overflow: hidden;
}

/* Project content area */
.project-content {
  padding: 1.5rem;
}

.project-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text-primary);
}

.project-content p {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

/* Technology badges */
.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--color-glass-strong);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-accent);
  margin: 0.25rem;
  transition: all var(--timing-normal) var(--easing);
  backdrop-filter: blur(var(--blur-sm));
}

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

/* ===================================================================
   CONTACT SECTION
   Contact form and information
   =================================================================== */

/* Contact section with dark overlay */
.contact {
  background: radial-gradient(circle at 40% 60%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
  position: relative;
  overflow: hidden;
}

/* Dark background overlay */
.contact-background-dark {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.3) 0%, transparent 70%);
  z-index: 1;
}

.contact .container {
  position: relative;
  z-index: 2;
}

/* Contact content layout */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  max-width: 1000px;
  margin: 0 auto;
}

/* Contact information section */
.contact-info {
  padding: 2rem 0;
}

.contact-info h3 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 2rem;
  color: var(--color-text-primary);
}

/* Contact items (email, phone) */
.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--color-glass);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-glass-border);
  transition: all var(--timing-normal) var(--easing);
}

.contact-item:hover {
  background: var(--color-glass-strong);
  transform: translateX(5px);
}

.contact-item svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-item a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--timing-normal) var(--easing);
}

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

/* Social media links */
.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-glass-strong);
  border: 2px solid var(--color-glass-border);
  color: var(--color-text-secondary);
  transition: all var(--timing-normal) var(--easing);
  backdrop-filter: blur(var(--blur-md));
  position: relative;
  overflow: hidden;
}

/* Shimmer effect for social links */
.social-links a::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s var(--easing);
}

.social-links a:hover::before {
  transform: translateX(100%);
}

/* Social link hover effects */
.social-links a:hover {
  transform: translateY(-4px) scale(1.1) rotate(5deg);
  box-shadow: var(--shadow-xl);
}

/* Platform-specific hover colors */
.social-links a[href*="github"]:hover {
  background: #24292e;
  color: #ffffff;
  border-color: #24292e;
  box-shadow: 0 8px 25px rgba(36, 41, 46, 0.4);
}

.social-links a[href*="linkedin"]:hover {
  background: #0077b5;
  color: #ffffff;
  border-color: #0077b5;
  box-shadow: 0 8px 25px rgba(0, 119, 181, 0.4);
}

.social-links a[href*="twitter"]:hover {
  background: #000000;
  color: #ffffff;
  border-color: #000000;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.social-links a[href*="instagram"]:hover {
  background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 8px 25px rgba(188, 24, 136, 0.4);
}

/* Contact form styling */
.contact-form {
  background: var(--color-glass-strong);
  backdrop-filter: blur(var(--blur-lg));
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* Form groups */
.form-group {
  margin-bottom: 1.5rem;
}

/* Form inputs and textarea */
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.5rem;
  background: var(--color-glass);
  border: 2px solid var(--color-glass-border);
  border-radius: 8px;
  color: var(--color-text-primary);
  font-size: 1rem;
  transition: all var(--timing-normal) var(--easing);
  backdrop-filter: blur(var(--blur-sm));
}

/* Form input focus states */
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-glass-strong);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Placeholder styling */
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

/* ===================================================================
   BUTTON SYSTEM
   Comprehensive button styling with multiple variants
   =================================================================== */

/* Base button styling */
.btn {
  margin-top: 0.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  border: none;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--timing-normal) var(--easing);
  position: relative;
  overflow: hidden;
  min-width: 120px;
  text-align: center;
  box-shadow: var(--shadow-md);
  will-change: transform, box-shadow;
  letter-spacing: 0.01em;
  font-family: inherit;
  backdrop-filter: blur(var(--blur-md));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Sliding light effect for buttons */
.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.6s var(--easing);
  z-index: 1;
}

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

/* Primary button variant */
.btn-primary {
  background: var(--color-brand-gradient);
  color: white;
  border: 1px solid transparent;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.3), 0 6px 16px rgba(139, 92, 246, 0.2);
  filter: brightness(1.1);
}

.btn-primary:active {
  transform: translateY(-1px) scale(1.01);
  transition: all 0.1s var(--easing);
}

/* Secondary button variant */
.btn-secondary {
  margin-left: 10px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(var(--blur-lg));
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  transform: translateY(-3px) scale(1.02);
  background: var(--color-brand-gradient-soft);
  border-color: rgba(99, 102, 241, 0.3);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-brand), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

/* Outline button variant */
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn-outline:hover {
  background: var(--color-brand-gradient);
  color: white;
  transform: translateY(-3px) scale(1.02);
  border-color: transparent;
  box-shadow: var(--shadow-brand);
}

/* Small button variant */
.btn-sm {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.875rem;
  min-width: 100px;
  border-radius: 50px;
}

/* Full width button */
.btn-full {
  width: 100%;
  justify-content: center;
}

/* Button focus states for accessibility */
.btn:focus-visible {
  outline: 2px solid rgba(99, 102, 241, 0.5);
  outline-offset: 3px;
  box-shadow: var(--shadow-brand), 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* Loading state for buttons */
.btn.loading {
  pointer-events: none;
  opacity: 0.8;
  cursor: not-allowed;
}

.btn.loading::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: buttonSpin 1s linear infinite;
  z-index: 2;
}

/* Button loading animation */
@keyframes buttonSpin {
  to {
    transform: rotate(360deg);
  }
}

/* ===================================================================
   FOOTER
   Simple footer with copyright information
   =================================================================== */

/* Footer styling */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-left p {
  text-align: center;
  margin: 0 auto;
  max-width: 90%;
  line-height: 1.6;
  letter-spacing: 0.3px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ===================================================================
   TOAST NOTIFICATIONS
   User feedback system
   =================================================================== */

/* Toast container */
.toast-container {
  position: fixed;
  top: 2rem;
  right: 2rem;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Individual toast styling */
.toast {
  background: var(--color-glass-strong);
  backdrop-filter: blur(var(--blur-lg));
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  color: var(--color-text-primary);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  opacity: 0;
  transition: all var(--timing-normal) var(--easing);
  max-width: 300px;
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

/* Toast variants */
.toast.success {
  border-left: 4px solid #10b981;
}

.toast.error {
  border-left: 4px solid #ef4444;
}

/* ===================================================================
   RESPONSIVE DESIGN
   Mobile-first responsive breakpoints
   =================================================================== */

/* Desktop navigation (768px and up) */
@media (min-width: 768px) {
  /* Show desktop navigation */
  .nav-menu {
    position: static;
    display: flex;
    flex-direction: row;
    justify-content: flex-end;
    align-items: center;
    width: auto;
    height: auto;
    background: transparent;
    backdrop-filter: none;
    opacity: 1;
    visibility: visible;
    gap: 0.5rem;
    padding-left: 5rem; /* Slight right shift */
  }

  .nav-menu li {
    margin: 0;
    opacity: 1;
    transform: none;
  }

  .nav-link {
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    white-space: nowrap;
  }

  .nav-toggle {
    display: none; /* Hide mobile toggle on desktop */
  }

  /* Adjust hero for navbar height */
  .hero {
    padding-top: 100px;
    min-height: 100vh;
    margin: 0;
  }
}

/* Mobile responsive design (768px and below) */
@media (max-width: 768px) {
  /* Show mobile toggle */
  .nav-toggle {
    display: flex;
  }

  /* Single column hero layout */
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .hero-text-side {
    padding-right: 0;
    order: 1;
  }

  .hero-animation-side {
    padding-left: 0;
    order: 2;
  }

  .animation-container {
    width: 300px;
    height: 300px;
  }

  /* Reduce section padding */
  section {
    padding: 3rem 0;
  }

  /* Smaller logo on mobile */
  .nav-brand .brand-logo svg {
    width: 100px;
    height: 32px;
  }

  /* Single column contact layout */
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* Footer adjustments */
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
}

/* Small mobile devices (480px and below) */
@media (max-width: 480px) {
  /* Vertical mobile menu */
  .nav-menu {
    flex-direction: column;
    gap: 1.5rem;
  }

  .nav-link {
    font-size: 1rem;
    padding: 0.875rem 1.5rem;
  }

  /* Responsive typography */
  .hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
  }
}

/* ===================================================================
   ACCESSIBILITY AND PERFORMANCE
   Reduced motion and high contrast support
   =================================================================== */

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  /* Hide decorative animations */
  .particle,
  .avatar-glow,
  .avatar-particles {
    display: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-text-secondary: #ffffff;
    --color-border: rgba(255, 255, 255, 0.3);
    --color-glass-border: rgba(255, 255, 255, 0.4);
  }
}

/* Print styles */
@media print {
  .navbar,
  .back-to-top,
  .particle-canvas,
  .tools-background,
  .contact-background {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }
}