/* Import Google Fonts for better typography */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap");

/* CSS Custom Properties for Design System */
:root {
  /* Color Palette */
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #a5b4fc;
  --secondary-color: #06b6d4;
  --accent-color: #f59e0b;
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Dark Theme Colors */
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;

  /* Typography */
  --font-family-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --font-family-mono: "JetBrains Mono", "Fira Code", monospace;

  /* Font Sizes */
  --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;
  --font-size-6xl: 3.75rem;

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

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

  /* Border Radius */
  --radius-sm: 0.125rem;
  --radius-base: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-base: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  line-height: 1.5;
}

body {
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  background-image: radial-gradient(
      circle at 25% 25%,
      rgba(99, 102, 241, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 75% 75%,
      rgba(6, 182, 212, 0.1) 0%,
      transparent 50%
    );
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography System */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

h1 {
  font-size: var(--font-size-5xl);
}
h2 {
  font-size: var(--font-size-4xl);
}
h3 {
  font-size: var(--font-size-3xl);
}
h4 {
  font-size: var(--font-size-2xl);
}
h5 {
  font-size: var(--font-size-xl);
}
h6 {
  font-size: var(--font-size-lg);
}

p {
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

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

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

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

/* 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;
}

/* Button Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  transform: translateY(0);
  box-shadow: var(--shadow-base);
  position: relative;
  overflow: hidden;
}

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

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

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-base);
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-dark) 100%
  );
  color: var(--color-white);
}

.btn-primary:hover {
  background: linear-gradient(
    135deg,
    var(--primary-dark) 0%,
    var(--primary-color) 100%
  );
}

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

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: var(--color-white);
}

.btn::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: var(--transition-slow);
}

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

/* Layout Containers */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

section {
  padding: var(--space-20) var(--space-6);
  position: relative;
}

/* Large Screen Layout Optimization */
@media (min-width: 1440px) {
  section {
    padding: var(--space-20) max(var(--space-6), calc((100vw - 1200px) / 2));
  }

  .hero-section {
    max-width: 1400px;
    margin: 0 auto;
  }

  .about-section {
    max-width: 1400px;
    margin: 0 auto;
  }

  .projects-section {
    max-width: 1600px;
    margin: 0 auto;
  }
}

/* Header and Navigation */
header {
  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 rgba(255, 255, 255, 0.1);
  transition: var(--transition-base);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-6);
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand .logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--text-primary);
  margin: 0;
}

.logo .accent {
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-8);
  margin: 0;
  padding: 0;
}

.nav-menu a {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  padding: var(--space-2) 0;
  position: relative;
  outline: none;
  transition: var(--transition-base);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  transition: var(--transition-base);
}

.nav-menu a:hover {
  color: var(--text-primary);
}

.nav-menu a:hover::after {
  width: 100%;
}

.hamburger {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-base);
  transition: var(--transition-base);
}

.hamburger:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.hamburger img {
  width: 24px;
  height: 24px;
}

/* Main Content Area */
main {
  margin-top: 80px; /* Account for fixed header */
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
      circle at 20% 80%,
      rgba(99, 102, 241, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(6, 182, 212, 0.15) 0%,
      transparent 50%
    );
  pointer-events: none;
}

.hero-content {
  flex: 1;
  z-index: 2;
  position: relative;
}

.hero-text {
  margin-bottom: var(--space-8);
}

.hero-name {
  font-size: clamp(var(--font-size-4xl), 5vw, var(--font-size-6xl));
  font-weight: var(--font-weight-extrabold);
  line-height: 1.1;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.name-highlight {
  color: var(--primary-color);
  position: relative;
}

.name-highlight::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: var(--radius-full);
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    box-shadow: 0 0 5px var(--primary-color);
  }
  to {
    box-shadow: 0 0 20px var(--primary-color), 0 0 30px var(--primary-color);
  }
}

.hero-subtitle {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-medium);
  color: var(--primary-light);
  margin-bottom: var(--space-6);
  opacity: 0;
  animation: fadeInUp 1s ease-out 0.5s forwards;
}

.hero-description {
  font-size: var(--font-size-lg);
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: var(--space-8);
  opacity: 0;
  animation: fadeInUp 1s ease-out 1s forwards;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 1s ease-out 1.5s forwards;
}

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

.hero-image-container {
  flex: 0 0 auto;
  position: relative;
  z-index: 2;
}

.hero-image {
  width: 400px;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  border: 4px solid var(--bg-secondary);
  transition: var(--transition-slow);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(1deg);
  }
}

.hero-image:hover {
  transform: scale(1.05) rotate(2deg);
  box-shadow: var(--shadow-2xl), 0 0 50px rgba(99, 102, 241, 0.3);
}

/* Removed hero-image-decoration - using clean transparent background image */

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-title {
  font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-5xl));
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--space-4);
  background: linear-gradient(
    135deg,
    var(--text-primary) 0%,
    var(--primary-light) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* Projects Section */
.projects-section {
  background: linear-gradient(
    135deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 100%
  );
  border-radius: var(--radius-3xl);
  margin: var(--space-16) 0;
}

.project-filters {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-3) var(--space-6);
  background: transparent;
  border: 2px solid var(--bg-tertiary);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: var(--transition-base);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-8);
}

.project-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-slow);
  position: relative;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl), 0 0 40px rgba(99, 102, 241, 0.2);
  border-color: var(--primary-color);
}

.project-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

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

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

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.8),
    rgba(6, 182, 212, 0.8)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-base);
}

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

.project-links {
  display: flex;
  gap: var(--space-4);
}

.project-link {
  padding: var(--space-3) var(--space-6);
  background: rgba(255, 255, 255, 0.9);
  border: 2px solid rgba(255, 255, 255, 1);
  border-radius: var(--radius-lg);
  color: var(--color-gray-900);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  backdrop-filter: blur(10px);
  transition: var(--transition-base);
  box-shadow: var(--shadow-md);
}

.project-link:hover {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.project-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.project-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

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

.tech-tag {
  padding: var(--space-1) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--primary-light);
  font-family: var(--font-family-mono);
}

/* About Section */
.about-section {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  min-height: 80vh;
}

.about-content {
  flex: 1;
}

.about-text {
  margin-bottom: var(--space-8);
}

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

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

.skills-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-6);
  color: var(--text-primary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-8);
}

.skill-category {
  background: var(--bg-secondary);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-base);
}

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

.skill-category h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
  color: var(--primary-light);
}

.skill-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.skill-list li {
  padding: var(--space-2) 0;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition-fast);
}

.skill-list li:hover {
  color: var(--text-primary);
  padding-left: var(--space-2);
}

.skill-list li:last-child {
  border-bottom: none;
}

/* Modern tag-style skill chips */
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.social-section {
  margin-top: var(--space-8);
}

.social-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.social-links {
  display: flex;
  gap: var(--space-4);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: var(--transition-base);
}

.social-link:hover {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.social-link img {
  width: 20px;
  height: 20px;
  filter: invert(0.6);
  transition: var(--transition-fast);
}

.social-link:hover img {
  filter: invert(1);
}

.about-image-container {
  flex: 0 0 auto;
  position: relative;
}

.about-image {
  width: 350px;
  height: 350px;
  object-fit: cover;
  border-radius: var(--radius-2xl);
  border: 4px solid var(--bg-secondary);
  box-shadow: var(--shadow-xl);
  transition: var(--transition-slow);
}

.about-image:hover {
  transform: scale(1.05) rotate(-2deg);
  box-shadow: var(--shadow-2xl), 0 0 40px rgba(99, 102, 241, 0.3);
}

.about-decoration {
  position: absolute;
  top: -15px;
  left: -15px;
  right: -15px;
  bottom: -15px;
  border: 2px solid var(--secondary-color);
  border-radius: var(--radius-3xl);
  opacity: 0.3;
  animation: rotateDecoration 20s linear infinite;
}

@keyframes rotateDecoration {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Contact Section */
.contact-section {
  background: linear-gradient(
    135deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 100%
  );
  border-radius: var(--radius-3xl);
  margin: var(--space-16) 0;
}

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

.contact-info {
  background: rgba(15, 15, 35, 0.9);
  padding: var(--space-8);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.25);
  display: grid;
  gap: var(--space-5);
}

.contact-item {
  position: relative;
  padding: var(--space-6);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-xl);
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.18);
}

.contact-item::before {
  content: attr(data-icon);
  position: absolute;
  top: var(--space-6);
  left: var(--space-6);
  font-size: 1.5rem;
  line-height: 1;
  padding: var(--space-2);
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: grid;
  place-items: center;
}

.contact-item h3,
.contact-item h4 {
  margin-top: 0;
  margin-bottom: var(--space-3);
  padding-left: calc(var(--space-6) + 2.5rem);
}

.contact-item h3 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-light);
}

.contact-item h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.contact-item p {
  color: var(--text-secondary);
  margin-bottom: 0;
  padding-left: calc(var(--space-6) + 2.5rem);
}

.contact-item a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition-fast);
  font-weight: var(--font-weight-semibold);
}

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

/* Form Styles */
.contact-form {
  background: rgba(15, 15, 35, 0.85);
  backdrop-filter: blur(18px);
  padding: var(--space-10);
  border-radius: var(--radius-3xl);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  max-width: 680px;
  margin: 0 auto;
}

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

.form-group {
  position: relative;
  margin-bottom: var(--space-6);
}

.form-group-full {
  grid-column: 1 / -1;
}

.form-label {
  position: absolute;
  left: var(--space-4);
  top: var(--space-4);
  padding: 0 var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
  background: rgba(15, 15, 35, 0.85);
  transition: transform var(--transition-fast), color var(--transition-fast);
  pointer-events: none;
  transform-origin: left top;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: calc(var(--space-4) + var(--space-4)) var(--space-4) var(--space-4);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  font-family: var(--font-family-primary);
  transition: var(--transition-base);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-group:focus-within .form-label,
.form-input:not(:placeholder-shown) + .form-label,
.form-textarea:not(:placeholder-shown) + .form-label {
  transform: translateY(-1.6rem) scale(0.85);
  color: var(--primary-color);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: transparent;
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

.error-message {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--error-color);
  margin-top: var(--space-2);
  min-height: 1rem;
}

.form-submit {
  width: 100%;
  position: relative;
  overflow: hidden;
  margin-top: var(--space-4);
}

.btn-loading {
  display: none;
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-submit:disabled:hover {
  transform: none;
}

.form-status {
  margin-top: var(--space-4);
  display: grid;
  gap: var(--space-3);
}

.form-status > div {
  display: none;
}

.form-success {
  padding: var(--space-4);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid var(--success-color);
  border-radius: var(--radius-lg);
  color: var(--success-color);
  text-align: center;
}

.form-error {
  padding: var(--space-4);
  background: rgba(231, 76, 60, 0.12);
  border: 1px solid var(--error-color);
  border-radius: var(--radius-lg);
  color: var(--error-color);
  text-align: center;
}

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--space-24);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-8);
  padding: var(--space-16) var(--space-6);
  max-width: 1200px;
  margin: 0 auto;
  align-items: start;
}

.footer-info h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--space-3);
}

.footer-info p {
  color: var(--text-secondary);
  margin: 0;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: var(--transition-fast);
}

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

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
}

.footer-social a:hover {
  background: var(--primary-color);
  transform: translateY(-2px);
}

.footer-social img {
  width: 18px;
  height: 18px;
  filter: invert(0.6);
  transition: var(--transition-fast);
}

.footer-social a:hover img {
  filter: invert(1);
}

.footer-bottom {
  padding: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* Mobile Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100vh;
  background: linear-gradient(
    135deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 100%
  );
  backdrop-filter: blur(20px);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1001;
  transition: var(--transition-slow);
  display: flex;
  flex-direction: column;
}

.sidebar.active {
  right: 0;
}

.sidebar-menu {
  padding: var(--space-8);
  flex: 1;
}

.close-btn {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  cursor: pointer;
  transition: var(--transition-base);
}

.close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.sidebar ul {
  list-style: none;
  margin: 0;
  padding: 0;
  margin-top: var(--space-16);
}

.sidebar li {
  margin-bottom: var(--space-4);
}

.sidebar a {
  display: block;
  padding: var(--space-4) var(--space-6);
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
}

.sidebar a:hover {
  background: rgba(99, 102, 241, 0.2);
  color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 1280px) {
  section {
    padding: var(--space-16) var(--space-4);
  }

  .container {
    padding: 0 var(--space-4);
  }

  .hero-section {
    gap: var(--space-12);
  }

  .hero-image {
    width: 300px;
    height: 300px;
  }

  .about-image {
    width: 300px;
    height: 300px;
  }

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

  .contact-content {
    gap: var(--space-12);
  }
}

@media (max-width: 1024px) {
  .hamburger {
    display: block;
  }

  .nav-menu {
    display: none;
  }

  .hero-section {
    flex-direction: column;
    text-align: center;
    padding-top: var(--space-16);
  }

  .hero-image-container {
    order: -1;
  }

  .about-section {
    flex-direction: column;
    text-align: center;
    gap: var(--space-12);
  }

  .about-image-container {
    order: -1;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

  .footer-social {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .hero-buttons {
    justify-content: center;
  }

  .project-filters {
    gap: var(--space-2);
  }

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

  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

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

  .contact-content {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-image {
    width: 250px;
    height: 250px;
  }

  .about-image {
    width: 250px;
    height: 250px;
  }
}

@media (max-width: 640px) {
  section {
    padding: var(--space-12) var(--space-4);
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }

  .hero-name {
    font-size: var(--font-size-4xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-xl);
  }

  .hero-description {
    font-size: var(--font-size-base);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .project-link {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-xs);
  }

  .contact-info,
  .contact-form {
    padding: var(--space-6);
  }

  .sidebar {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .navbar {
    padding: var(--space-3) var(--space-4);
  }

  .hero-image {
    width: 200px;
    height: 200px;
  }

  .about-image {
    width: 200px;
    height: 200px;
  }

  .section-header {
    margin-bottom: var(--space-12);
  }

  .footer-content {
    padding: var(--space-12) var(--space-4);
  }
}

/* Animations and Interactions */
@keyframes slideInFromTop {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

/* Utility Classes */
.fade-in {
  animation: fadeInUp 0.6s ease-out forwards;
}

.slide-in-left {
  animation: slideInFromLeft 0.6s ease-out forwards;
}

.slide-in-right {
  animation: slideInFromRight 0.6s ease-out forwards;
}

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

button:focus,
input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Additional JavaScript-related styles */
.nav-menu a.active {
  color: var(--primary-color);
}

.nav-menu a.active::after {
  width: 100%;
}

.form-input.error,
.form-textarea.error {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

header.scrolled {
  background: rgba(15, 15, 35, 0.95);
  box-shadow: var(--shadow-lg);
}

body.loaded {
  opacity: 1;
}