/* ==================== */
/* CSS CUSTOM PROPERTIES */
/* ==================== */

:root {
  /* Colors - Dark Theme (Default) */
  --primary-color: #6c5ce7;
  --primary-dark: #5a4fcf;
  --primary-light: #8b7ef7;
  --secondary-color: #00d2d3;
  --secondary-dark: #00b8b9;
  --secondary-light: #2de5e6;
  
  --accent-color: #fd79a8;
  --accent-dark: #e84393;
  --accent-light: #fdcb9e;
  
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-card: #1e1e3f;
  
  --text-primary: #ffffff;
  --text-secondary: #b8b9c7;
  --text-muted: #8a8b9a;
  
  --border-color: #2d2d4a;
  --shadow-light: rgba(108, 92, 231, 0.1);
  --shadow-medium: rgba(108, 92, 231, 0.2);
  --shadow-heavy: rgba(108, 92, 231, 0.3);
  
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --gradient-secondary: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  --gradient-bg: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --border-color: #e2e8f0;
  --shadow-light: rgba(0, 0, 0, 0.05);
  --shadow-medium: rgba(0, 0, 0, 0.1);
  --shadow-heavy: rgba(0, 0, 0, 0.15);
  
  --gradient-bg: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
}

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

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

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

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

button {
  border: none;
  outline: none;
  cursor: pointer;
  font-family: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

/* ==================== */
/* UTILITY CLASSES */
/* ==================== */

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-3xl);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--border-radius);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--border-radius);
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border: none;
  font-size: var(--font-size-base);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px var(--shadow-medium);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-heavy);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

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

.btn-loading {
  display: none;
}

.btn.loading .btn-text {
  display: none;
}

.btn.loading .btn-loading {
  display: inline-flex;
}

/* ==================== */
/* NAVIGATION */
/* ==================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 15, 35, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, 0.9);
}

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

.nav-logo a {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: var(--space-sm) 0;
  transition: var(--transition);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.theme-toggle {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--primary-color);
  color: white;
  transform: rotate(180deg);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: var(--space-sm);
}

.bar {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.hamburger.active .bar:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

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

/* ==================== */
/* HERO SECTION */
/* ==================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-bg);
  position: relative;
  overflow: hidden;
}

[data-theme="light"] .hero::before {
  background: radial-gradient(circle at 20% 80%, rgba(108, 92, 231, 0.05) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(0, 210, 211, 0.05) 0%, transparent 50%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  position: relative;
  z-index: 1;
}

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

.greeting {
  display: block;
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.name {
  display: block;
  font-size: var(--font-size-5xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: var(--font-size-2xl);
  color: var(--secondary-color);
  margin-bottom: var(--space-lg);
  font-weight: 600;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

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

.social-links a {
  width: 50px;
  height: 50px;
  background: var(--bg-tertiary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-3px);
}

.hero-visual {
  position: relative;
  animation: fadeInRight 1s ease-out 0.3s both;
}

.floating-card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  box-shadow: 0 20px 40px var(--shadow-heavy);
  border: 1px solid var(--border-color);
  animation: float 6s ease-in-out infinite;
}

.code-snippet {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

.code-header {
  display: flex;
  align-items: center;
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-md);
}

.dots {
  display: flex;
  gap: var(--space-sm);
}

.dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-muted);
}

.dots span:nth-child(1) { background: #ff5f56; }
.dots span:nth-child(2) { background: #ffbd2e; }
.dots span:nth-child(3) { background: #27ca3f; }

.code-line {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.code-line.indent {
  padding-left: var(--space-lg);
}

.keyword { color: #ff7b72; }
.variable { color: #79c0ff; }
.operator { color: var(--text-primary); }
.property { color: #7ee787; }
.string { color: #a5d6ff; }
.number { color: #ffa657; }

.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.scroll-arrow {
  color: var(--text-muted);
  font-size: var(--font-size-xl);
}

/* ==================== */
/* ABOUT SECTION */
/* ==================== */

.about {
  padding: var(--space-3xl) 0;
  background: var(--bg-secondary);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-text p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.stat {
  text-align: center;
  padding: var(--space-xl);
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.stat:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow-medium);
}

.stat h3 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--space-sm);
}

.stat p {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ==================== */
/* EXPERIENCE SECTION */
/* ==================== */

.experience {
  padding: var(--space-3xl) 0;
}

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

.timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-primary);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-3xl);
  padding-left: 80px;
}

.timeline-dot {
  position: absolute;
  left: 20px;
  top: 0;
  width: 20px;
  height: 20px;
  background: var(--primary-color);
  border-radius: 50%;
  border: 4px solid var(--bg-primary);
  box-shadow: 0 0 0 4px var(--primary-color);
}

.timeline-content {
  background: var(--bg-card);
  padding: var(--space-xl);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  position: relative;
  transition: var(--transition);
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow-medium);
}

.timeline-content::before {
  content: '';
  position: absolute;
  left: -15px;
  top: 20px;
  width: 0;
  height: 0;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-right: 15px solid var(--bg-card);
}

.timeline-date {
  color: var(--primary-color);
  font-weight: 600;
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-sm);
}

.timeline-content h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.timeline-content h4 {
  color: var(--secondary-color);
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.timeline-content p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.timeline-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.timeline-skills span {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* ==================== */
/* EDUCATION SECTION */
/* ==================== */

.education {
  padding: var(--space-3xl) 0;
  background: var(--bg-secondary);
}

.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-2xl);
  max-width: 900px;
  margin: 0 auto;
}

.education-card {
  background: var(--bg-card);
  padding: var(--space-2xl);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
}

.education-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--shadow-medium);
}

.education-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-size: var(--font-size-2xl);
  color: white;
}

.education-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
}

.education-card h4 {
  color: var(--secondary-color);
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.education-year {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.education-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.skills {
  padding: var(--space-3xl) 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-2xl);
  max-width: 1000px;
  margin: 0 auto;
}

.skill-category {
  background: var(--bg-card);
  padding: var(--space-2xl);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow-medium);
}

.skill-category h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xl);
  text-align: center;
  color: var(--primary-color);
}

.skill-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.skill-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.skill-item i {
  font-size: var(--font-size-xl);
  color: var(--primary-color);
  width: 30px;
  text-align: center;
}

.skill-item span {
  font-weight: 500;
  flex: 1;
}

.skill-level {
  width: 100px;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
  overflow: hidden;
  position: relative;
}

.skill-level::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--border-radius);
  transition: width 2s ease-out;
  width: 0;
}

.skill-level[data-level="90"]::after { width: 90%; }
.skill-level[data-level="85"]::after { width: 85%; }
.skill-level[data-level="88"]::after { width: 88%; }
.skill-level[data-level="92"]::after { width: 92%; }
.skill-level[data-level="82"]::after { width: 82%; }
.skill-level[data-level="78"]::after { width: 78%; }
.skill-level[data-level="75"]::after { width: 75%; }
.skill-level[data-level="70"]::after { width: 70%; }
.skill-level[data-level="80"]::after { width: 80%; }

/* ==================== */
/* PROJECTS SECTION */
/* ==================== */

.projects {
  padding: var(--space-3xl) 0;
  background: var(--bg-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-2xl);
  max-width: 1200px;
  margin: 0 auto;
}

.project-card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--shadow-medium);
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

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

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 15, 35, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

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

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

.project-links {
  display: flex;
  gap: var(--space-lg);
}

.project-links a {
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-lg);
  transition: var(--transition);
}

.project-links a:hover {
  background: var(--secondary-color);
  transform: scale(1.1);
}

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

.project-content h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-md);
}

.project-content p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.project-tech span {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* ==================== */
/* BLOG SECTION */
/* ==================== */

.blog {
  padding: var(--space-3xl) 0;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-2xl);
  max-width: 1200px;
  margin: 0 auto;
}

.blog-card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.blog-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--shadow-medium);
}

.blog-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

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

.blog-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 15, 35, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.blog-card:hover .blog-overlay {
  opacity: 1;
}

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

.blog-links {
  display: flex;
  gap: var(--space-lg);
}

.blog-links a {
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-lg);
  transition: var(--transition);
}

.blog-links a:hover {
  background: var(--secondary-color);
  transform: scale(1.1);
}

.blog-content {
  padding: var(--space-xl);
}

.blog-meta {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.blog-meta span {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.blog-content h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.blog-content p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.blog-tags span {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* ==================== */
/* CONTACT SECTION */
/* ==================== */

.contact {
  padding: var(--space-3xl) 0;
  background: var(--bg-secondary);
}

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

.contact-info h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-lg);
  color: var(--primary-color);
}

.contact-info p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
  font-size: var(--font-size-lg);
}

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

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.contact-item i {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-lg);
}

.contact-form {
  background: var(--bg-card);
  padding: var(--space-2xl);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: var(--space-xl);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

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

.error-message {
  color: var(--accent-color);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  display: none;
}

.error-message.show {
  display: block;
}

.form-group.error input,
.form-group.error textarea {
  border-color: var(--accent-color);
}

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

.footer {
  background: var(--bg-primary);
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border-color);
}

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

.footer-content p {
  color: var(--text-secondary);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--primary-color);
  color: white;
}

/* ==================== */
/* ANIMATIONS */
/* ==================== */

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

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

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

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

/* Intersection Observer animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==================== */
/* RESPONSIVE DESIGN */
/* ==================== */

@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-2xl);
  }
  
  .contact-content {
    grid-template-columns: 1fr;
  }
  
  .timeline::before {
    left: 15px;
  }
  
  .timeline-item {
    padding-left: 50px;
  }
  
  .timeline-dot {
    left: 5px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--bg-primary);
    flex-direction: column;
    justify-content: start;
    align-items: center;
    padding-top: var(--space-3xl);
    transition: var(--transition);
    border-top: 1px solid var(--border-color);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero-content {
    padding-top: 100px;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .name {
    font-size: var(--font-size-4xl) !important;
  }
  
  .hero-subtitle {
    font-size: var(--font-size-xl);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .about-stats {
    grid-template-columns: 1fr;
  }
  
  .timeline {
    margin-left: var(--space-lg);
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--space-lg);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .nav-container {
    padding: 0 var(--space-md);
  }
  
  .hero-content {
    padding: 100px var(--space-md);
  }
  
  .name {
    font-size: var(--font-size-3xl) !important;
  }
  
  .hero-description {
    font-size: var(--font-size-base);
  }
  
  .projects-grid,
  .blog-grid,
  .skills-grid,
  .education-grid {
    grid-template-columns: 1fr;
  }
  
  .timeline-content::before {
    display: none;
  }
  
  .social-links {
    justify-content: center;
  }
}