/* Personal Resume Website - Main Stylesheet */

/* Import Inter font from Google Fonts with font-display: swap for better performance */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* Font face fallback for better performance */
@font-face {
  font-family: 'Inter Fallback';
  src: local('Arial'), local('Helvetica'), local('sans-serif');
  font-display: swap;
  ascent-override: 90%;
  descent-override: 22%;
  line-gap-override: 0%;
}

/* CSS Custom Properties - Color Palette */
:root {
  /* Primary Colors */
  --primary-blue: #87CEEB;
  /* Sky blue */
  --primary-blue-dark: #4682B4;
  /* Steel blue for contrast */
  --white: #FFFFFF;
  --gray-light: #F8F9FA;
  --gray-medium: #6C757D;
  --gray-dark: #343A40;
  --accent-blue: #E3F2FD;
  /* Very light blue for backgrounds */

  /* Typography */
  --font-family-primary: 'Inter', 'Inter Fallback', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Font Sizes */
  --font-size-xs: 0.75rem;
  /* 12px */
  --font-size-sm: 0.875rem;
  /* 14px */
  --font-size-base: 1rem;
  /* 16px */
  --font-size-lg: 1.125rem;
  /* 18px */
  --font-size-xl: 1.25rem;
  /* 20px */
  --font-size-2xl: 1.5rem;
  /* 24px */
  --font-size-3xl: 1.875rem;
  /* 30px */
  --font-size-4xl: 2.25rem;
  /* 36px */

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing System */
  --spacing-xs: 0.25rem;
  /* 4px */
  --spacing-sm: 0.5rem;
  /* 8px */
  --spacing-md: 1rem;
  /* 16px */
  --spacing-lg: 1.5rem;
  /* 24px */
  --spacing-xl: 2rem;
  /* 32px */
  --spacing-2xl: 3rem;
  /* 48px */
  --spacing-3xl: 4rem;
  /* 64px */
  --spacing-4xl: 5rem;
  /* 80px */
  --spacing-5xl: 6rem;
  /* 96px */

  /* Border Radius */
  --border-radius-sm: 0.25rem;
  /* 4px */
  --border-radius-md: 0.5rem;
  /* 8px */
  --border-radius-lg: 0.75rem;
  /* 12px */
  --border-radius-xl: 1rem;
  /* 16px */
  --border-radius-full: 9999px;
  /* Full circle */

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-normal: 300ms ease-out;
  --transition-slow: 500ms ease-out;
}

/* CSS 
Reset and Normalize */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--gray-dark);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Remove default list styles */
ul,
ol {
  list-style: none;
}

/* Remove default link styles */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--primary-blue);
}

/* Remove default button styles */
button {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  cursor: pointer;
  outline: inherit;
}

/* Image defaults with performance optimizations */
img {
  max-width: 100%;
  height: auto;
  display: block;
  /* Performance optimizations */
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  /* Prevent layout shift */
  aspect-ratio: attr(width) / attr(height);
}

/* Lazy loading support */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

img[loading="lazy"].loaded {
  opacity: 1;
}

/* Form element defaults */
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

/* Enhanced focus styles for accessibility */
:focus {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Enhanced focus-visible styles for better keyboard navigation */
:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(135, 206, 235, 0.2);
}

/* Specific focus styles for interactive elements */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(135, 206, 235, 0.2);
  border-radius: var(--border-radius-sm);
}

/* Form element focus styles */
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(135, 206, 235, 0.1);
}

/* Skip link for screen readers and keyboard users */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-blue-dark);
  color: var(--white);
  padding: 8px;
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  z-index: 1000;
  font-weight: var(--font-weight-medium);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
  outline: 2px solid var(--white);
  outline-offset: 2px;
}

/* Typography Base Styles */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--gray-dark);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

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

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

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

p {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
}

/* Utility Classes */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-4xl) 0;
}

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

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

.text-secondary {
  color: var(--gray-medium);
}

.font-light {
  font-weight: var(--font-weight-light);
}

.font-medium {
  font-weight: var(--font-weight-medium);
}

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

.font-bold {
  font-weight: var(--font-weight-bold);
}

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

/* Navigation Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal);
}

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

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo a {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-blue-dark);
  transition: color var(--transition-fast);
}

.nav-logo a:hover,
.nav-logo a:focus {
  color: var(--primary-blue);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-menu a {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--gray-dark);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-menu a:hover,
.nav-menu a:focus {
  color: var(--primary-blue);
  background-color: var(--accent-blue);
}

.nav-menu a.active {
  color: var(--primary-blue);
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background-color: var(--primary-blue);
  border-radius: var(--border-radius-full);
}

/* Mobile hamburger menu button */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 30px;
  height: 30px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.hamburger-line {
  width: 25px;
  height: 3px;
  background-color: var(--gray-dark);
  margin: 2px 0;
  transition: all var(--transition-normal);
  border-radius: var(--border-radius-sm);
}

.nav-toggle:hover .hamburger-line {
  background-color: var(--primary-blue);
}

.nav-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Add top padding to body to account for fixed header */
body {
  padding-top: 70px;
}

/* Hero Section Styles */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(135, 206, 235, 0.9) 0%, rgba(70, 130, 180, 0.9) 100%);
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.hero-image {
  margin-bottom: var(--spacing-2xl);
}

.headshot {
  width: 200px;
  height: 200px;
  border-radius: var(--border-radius-full);
  border: 4px solid var(--white);
  box-shadow: var(--shadow-xl);
  margin: 0 auto;
  background-color: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--primary-blue-dark);
  transition: all var(--transition-normal);
}

.hero-content {
  animation: fadeInUp 1s ease-out;
}

.hero-name {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  color: var(--white);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.5);
}

.hero-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-lg);
  color: var(--white);
  opacity: 0.95;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.hero-tagline {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-2xl);
  color: var(--white);
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.hero-cta {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-2xl);
  background-color: var(--white);
  color: var(--primary-blue-dark);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  text-decoration: none;
}

.hero-cta:hover,
.hero-cta:focus {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  background-color: var(--accent-blue);
  color: var(--primary-blue-dark);
}

/* Hero animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Section Component Styles */
.section {
  padding: var(--spacing-4xl) 0;
}

.section:nth-child(even) {
  background-color: var(--gray-light);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-3xl);
  text-align: center;
}

.section-icon {
  width: 48px;
  height: 48px;
  margin-right: var(--spacing-lg);
  color: var(--primary-blue);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.section-icon svg {
  width: 100%;
  height: 100%;
  stroke-width: 1.5;
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-dark);
  margin: 0;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  border-radius: var(--border-radius-full);
}

/* About Me Section Styles */
.about {
  padding: var(--spacing-4xl) 0;
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.about-text {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--gray-dark);
}

.about-text p {
  margin-bottom: var(--spacing-lg);
}

.about-highlights {
  background-color: var(--white);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--primary-blue);
}

.about-highlights h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-blue-dark);
  margin-bottom: var(--spacing-lg);
}

.about-highlights ul {
  list-style: none;
  padding: 0;
}

.about-highlights li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-base);
  color: var(--gray-dark);
  line-height: var(--line-height-normal);
}

.about-highlights li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary-blue);
  font-weight: var(--font-weight-bold);
}

/* Experience Section Styles */
.experience {
  padding: var(--spacing-4xl) 0;
  background-color: var(--gray-light);
}

.experience-timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.experience-timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
}

.experience-item {
  position: relative;
  margin-bottom: var(--spacing-3xl);
  padding-left: var(--spacing-4xl);
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-2xl);
  margin-left: var(--spacing-3xl);
  transition: all var(--transition-normal);
}

.experience-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.experience-item::before {
  content: '';
  position: absolute;
  left: -47px;
  top: var(--spacing-2xl);
  width: 16px;
  height: 16px;
  background-color: var(--primary-blue);
  border: 3px solid var(--white);
  border-radius: var(--border-radius-full);
  box-shadow: var(--shadow-md);
}

.experience-meta {
  margin-bottom: var(--spacing-lg);
}

.experience-role {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-blue-dark);
  margin-bottom: var(--spacing-xs);
}

.experience-company {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--gray-dark);
  margin-bottom: var(--spacing-sm);
}

.experience-duration {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--gray-medium);
  background-color: var(--accent-blue);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-md);
  display: inline-block;
}

.experience-description p {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--gray-dark);
  margin-bottom: var(--spacing-md);
}

.experience-description ul {
  list-style: none !important;
  list-style-type: none !important;
  list-style-image: none !important;
  list-style-position: outside !important;
  padding: 0 !important;
  margin: 0 !important;
  padding-left: 0 !important;
  margin-left: 0 !important;
}

.experience-description li {
  position: static;
  padding: 0 !important;
  padding-left: 0 !important;
  margin-left: 0 !important;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-base);
  color: var(--gray-dark);
  line-height: var(--line-height-normal);
  list-style: none !important;
  list-style-type: none !important;
  list-style-image: none !important;
  list-style-position: outside !important;
}

.experience-description li::before {
  display: none !important;
  content: none !important;
}

.experience-description li::marker {
  display: none !important;
  content: none !important;
}

/* Education Section Styles */
.education {
  padding: var(--spacing-4xl) 0;
}

.education-list {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: var(--spacing-2xl);
}

.education-item {
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-2xl);
  border-left: 4px solid var(--primary-blue);
  transition: all var(--transition-normal);
}

.education-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.education-meta {
  margin-bottom: var(--spacing-lg);
}

.education-degree {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-blue-dark);
  margin-bottom: var(--spacing-xs);
}

.education-institution {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--gray-dark);
  margin-bottom: var(--spacing-sm);
}

.education-year {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--gray-medium);
  background-color: var(--accent-blue);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-md);
  display: inline-block;
}

.education-details p {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--gray-dark);
  margin: 0;
}

/* Projects Section Styles */
.projects {
  padding: var(--spacing-4xl) 0;
  background-color: var(--gray-light);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  max-width: 1200px;
  margin: 0 auto;
}

.project-card {
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

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

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-image {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background-color: var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* Placeholder styling for missing images */
.project-image img[src*="placeholder"] {
  background-color: var(--accent-blue);
  color: var(--primary-blue-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}



.project-content {
  padding: var(--spacing-xl);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.project-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-blue-dark);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-tight);
  transition: color var(--transition-fast);
}

.project-card:hover .project-title {
  color: var(--primary-blue);
}

.project-description {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--gray-dark);
  margin-bottom: var(--spacing-lg);
  flex-grow: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.tech-tag {
  background-color: var(--accent-blue);
  color: var(--primary-blue-dark);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--primary-blue);
  transition: all var(--transition-fast);
}

.tech-tag:hover {
  background-color: var(--primary-blue);
  color: var(--white);
}

.project-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: auto;
}

.project-link {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--primary-blue);
  color: var(--white);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--border-radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
  text-align: center;
  flex: 1;
}

.project-link:hover,
.project-link:focus {
  background-color: var(--primary-blue-dark);
  color: var(--white);
  transform: translateY(-1px);
}

/* Responsive grid layout */
@media (max-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .project-content {
    padding: var(--spacing-lg);
  }
}

/* Skills Section Styles */
.skills {
  padding: var(--spacing-4xl) 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
  max-width: 1200px;
  margin: 0 auto;
}

.skill-category {
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-2xl);
  border-top: 4px solid var(--primary-blue);
  transition: all var(--transition-normal);
}

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

.skill-category-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-blue-dark);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  position: relative;
}

.skill-category-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background-color: var(--primary-blue);
  border-radius: var(--border-radius-full);
}

/* Skills with progress bars */
.skill-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.skill-name {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--gray-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skill-name::after {
  content: attr(data-level);
  font-size: var(--font-size-sm);
  color: var(--gray-medium);
  font-weight: var(--font-weight-normal);
}

.skill-bar {
  height: 8px;
  background-color: var(--gray-light);
  border-radius: var(--border-radius-full);
  overflow: hidden;
  position: relative;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  border-radius: var(--border-radius-full);
  width: 0%;
  transition: width 1s ease-out, box-shadow 0.3s ease;
  position: relative;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.skill-progress::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 4px;
  background-color: rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius-full);
}

.skill-progress::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.2) 50%, transparent 100%);
  border-radius: var(--border-radius-full);
  animation: shimmer 2s infinite;
  opacity: 0;
}

.skill-progress.animated::before {
  opacity: 1;
}

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

  100% {
    transform: translateX(100%);
  }
}

/* Skills with tags */
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
}

.skill-tag {
  background-color: var(--accent-blue);
  color: var(--primary-blue-dark);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--primary-blue);
  transition: all var(--transition-fast);
  cursor: default;
  position: relative;
  overflow: hidden;
  opacity: 1;
  transform: translateY(0);
}

.skill-tag::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

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

.skill-tag:hover::before {
  left: 100%;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .skill-category {
    padding: var(--spacing-xl);
  }

  .skill-tags {
    justify-content: flex-start;
  }
}

/* Contact Section Styles */
.contact {
  padding: var(--spacing-4xl) 0;
  background-color: var(--gray-light);
}

.contact-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
  max-width: 1000px;
  margin: 0 auto;
  align-items: start;
}

.contact-form-container {
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-2xl);
}

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

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

.form-group label {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--gray-dark);
}

.form-group input,
.form-group textarea {
  padding: var(--spacing-md);
  border: 2px solid var(--gray-light);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
  background-color: var(--white);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(135, 206, 235, 0.1);
}

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

.error-message {
  font-size: var(--font-size-sm);
  color: #dc3545;
  display: none;
}

.submit-btn {
  padding: var(--spacing-md) var(--spacing-2xl);
  background-color: var(--primary-blue);
  color: var(--white);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  align-self: flex-start;
}

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

.contact-info {
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-2xl);
  border-left: 4px solid var(--primary-blue);
}

.contact-info h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-blue-dark);
  margin-bottom: var(--spacing-lg);
}

.contact-info p {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--gray-dark);
  margin-bottom: var(--spacing-xl);
}

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

.social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--accent-blue);
  border-radius: var(--border-radius-md);
  color: var(--primary-blue-dark);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-weight: var(--font-weight-medium);
}

.social-link:hover,
.social-link:focus {
  background-color: var(--primary-blue);
  color: var(--white);
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.social-link:hover .social-icon svg,
.social-link:focus .social-icon svg {
  transform: scale(1.1);
}

.social-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.social-icon svg {
  width: 100%;
  height: 100%;
  stroke-width: 2;
  transition: all var(--transition-fast);
}

/* Footer Styles */
.footer {
  background-color: var(--gray-dark);
  color: var(--white);
  text-align: center;
  padding: var(--spacing-xl) 0;
}

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

/* Responsive Contact Section */
@media (max-width: 768px) {
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .contact-form-container,
  .contact-info {
    padding: var(--spacing-xl);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  /* Remove parallax and transform effects for users who prefer reduced motion */
  .hero::before,
  .project-card:hover,
  .skill-category:hover,
  .experience-item:hover,
  .education-item:hover {
    transform: none !important;
  }
}

/* Performance optimizations */
/* Use GPU acceleration for frequently animated elements */
.nav-toggle,
.hamburger-line,
.project-card,
.skill-progress,
.hero-cta,
.social-link {
  will-change: transform;
  transform: translateZ(0);
}

/* Optimize repaints */
.nav-menu,
.hero,
.section {
  contain: layout style paint;
}

/* Optimize font rendering */
body {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern" 1, "liga" 1;
}

/* Critical resource hints for better loading */
.hero {
  content-visibility: auto;
  contain-intrinsic-size: 100vh;
}

.section:not(.hero) {
  content-visibility: auto;
  contain-intrinsic-size: 500px;
}