/* Modern Portfolio CSS - Clean & Minimalist Design */

/* CSS Custom Properties */
:root {
  /* Colors */
  --primary-color: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  --primary-color-10: rgba(59, 130, 246, 0.1);
  --secondary-color: #8b5cf6;
  --secondary-color-10: rgba(139, 92, 246, 0.1);
  --accent-color: #06b6d4;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;

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

  /* Dark Theme Colors */
  --dark-bg: #0f172a;
  --dark-surface: #1e293b;
  --dark-surface-light: #334155;
  --dark-text: #f1f5f9;
  --dark-text-secondary: #cbd5e1;

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

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  /* Spacing */
  --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;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 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);

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

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

  /* Layout */
  --container-max-width: 1200px;
  --header-height: 80px;
  --section-padding: var(--space-20);
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --bg-primary: var(--dark-bg);
  --bg-secondary: var(--dark-surface);
  --bg-tertiary: var(--dark-surface-light);
  --text-primary: var(--dark-text);
  --text-secondary: var(--dark-text-secondary);
  --border-color: var(--gray-700);
  --primary-color-10: rgba(59, 130, 246, 0.15);
  --secondary-color-10: rgba(139, 92, 246, 0.15);

  /* Dark theme shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.4), 0 1px 2px -1px rgb(0 0 0 / 0.4);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4),
    0 4px 6px -4px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.4),
    0 8px 10px -6px rgb(0 0 0 / 0.4);
}

/* Default Theme Variables removed - using data-theme selectors only */

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: var(--white);
  --bg-secondary: var(--gray-50);
  --bg-tertiary: var(--gray-100);
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-600);
  --border-color: var(--gray-200);
}

/* 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(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  transition: color var(--transition);
}

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

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  transition: color var(--transition);
}

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

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

/* Utility Classes */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

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

.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}

.grid {
  display: grid;
}
.gap-4 {
  gap: var(--space-4);
}
.gap-6 {
  gap: var(--space-6);
}
.gap-8 {
  gap: var(--space-8);
}

.hidden {
  display: none;
}
.block {
  display: block;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

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

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  transition: all var(--transition-fast);
}

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

/* Header & Navigation */

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition);
  opacity: 0.95;
}

.navbar.scrolled {
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  opacity: 0.98;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.brand-link:hover {
  transform: translateY(-1px);
}

.brand-logo {
  width: 32px;
  height: 32px;
  transition: all var(--transition-fast);
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
}

.brand-logo:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.brand-text {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.brand-accent {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-left: 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

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

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background: var(--bg-secondary);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
  border-radius: var(--radius-full);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 1001;
  box-shadow: var(--shadow-lg);
}

.theme-toggle:hover {
  background: var(--bg-secondary);
  transform: scale(1.05);
}

.theme-toggle i {
  width: 20px;
  height: 20px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  position: absolute;
}

/* Theme Toggle Icon Logic */
/* Smooth transitions for icon changes */
.theme-toggle i {
  transition: all var(--transition-fast), transform 0.3s ease;
  transform: rotate(0deg) scale(1);
}

.theme-toggle:hover i {
  transform: rotate(15deg) scale(1.1);
}

.theme-toggle:active i {
  transform: rotate(0deg) scale(0.95);
}

/* Icon color for dark theme */
[data-theme="dark"] .theme-toggle i[data-lucide="sun"] {
  color: white;
}

/* Hero Section */
.hero {
  padding-top: 70px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(
    135deg,
    var(--bg-primary) 0%,
    var(--bg-secondary) 100%
  );
  position: relative;
  overflow: hidden;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  width: 100%;
  position: relative;
}

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

.hero-text {
  z-index: 2;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  min-height: 2em;
  display: flex;
  align-items: center;
}

.typing-text {
  color: var(--primary-color);
  font-weight: 600;
}

.cursor {
  color: var(--primary-color);
  animation: blink 1s infinite;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-8);
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

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

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

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--primary-color);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition);
}

.profile-image:hover {
  transform: scale(1.05);
}

.image-glow {
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
  opacity: 0.2;
  border-radius: 50%;
  animation: pulse 3s ease-in-out infinite;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  animation: float 3s ease-in-out infinite;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.scroll-indicator:hover {
  transform: translateX(-50%) scale(1.1);
}

.scroll-mouse {
  width: 24px;
  height: 40px;
  border: 2px solid var(--text-secondary);
  border-radius: 12px;
  position: relative;
  background: transparent;
  transition: all var(--transition-fast);
}

.scroll-indicator:hover .scroll-mouse {
  border-color: var(--primary-color);
}

.scroll-wheel {
  width: 4px;
  height: 8px;
  background: var(--text-secondary);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-wheel 2s ease-in-out infinite;
  transition: background var(--transition-fast);
}

.scroll-indicator:hover .scroll-wheel {
  background: var(--primary-color);
}

.scroll-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  transition: color var(--transition-fast);
}

.scroll-indicator:hover .scroll-text {
  color: var(--primary-color);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
      circle at 20% 80%,
      var(--primary-color-10) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      var(--secondary-color-10) 0%,
      transparent 50%
    );
  pointer-events: none;
}

@keyframes float {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-10px);
  }
}

@keyframes scroll-wheel {
  0% {
    opacity: 1;
    top: 6px;
  }
  50% {
    opacity: 0.5;
    top: 16px;
  }
  100% {
    opacity: 1;
    top: 6px;
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.2;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(1.05);
  }
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="%233b82f6" stop-opacity="0.1"/><stop offset="100%" stop-color="%233b82f6" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="400" cy="700" r="120" fill="url(%23a)"/></svg>')
    no-repeat center center;
  background-size: cover;
  opacity: 0.5;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  font-size: var(--text-6xl);
  margin-bottom: var(--space-6);
  background: linear-gradient(
    135deg,
    var(--text-primary),
    var(--primary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text .subtitle {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-slow);
}

.hero-image:hover img {
  transform: scale(1.05) rotate(2deg);
}

/* Typing Animation */
.typing-text {
  color: var(--primary-color);
  font-weight: 600;
}

.typing-text::after {
  content: "|";
  animation: blink 1s infinite;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

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

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

.section-title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: var(--radius-full);
}

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

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-12);
  align-items: start;
  max-width: 1200px;
  margin: 0 auto;
}

.about-text {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.about-text h3 {
  color: var(--primary-color);
  margin-bottom: var(--space-4);
  font-size: var(--text-2xl);
}

.about-description {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-4);
  font-size: var(--text-base);
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  width: 100%;
  max-width: 200px;
  transition: all var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.stat-number {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary-color);
  display: block;
  margin-bottom: var(--space-2);
}

.stat-label {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

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

  .about-stats {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .stat-card {
    max-width: 150px;
    flex: 1;
    min-width: 120px;
  }
}

.about-image {
  position: relative;
}

.about-image img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

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

.about-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
  margin: var(--space-8) 0;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.highlight-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.highlight-item i {
  width: 48px;
  height: 48px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: var(--text-xl);
  flex-shrink: 0;
}

.highlight-item div {
  flex: 1;
}

.highlight-item h4 {
  margin: 0 0 var(--space-2) 0;
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: 600;
}

.highlight-item p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .highlight-item {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .highlight-item div {
    text-align: center;
  }
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.stat-item {
  text-align: center;
  padding: var(--space-6);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.stat-number {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary-color);
  display: block;
}

.stat-label {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

.skill-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  transform: scaleX(0);
  transition: transform var(--transition);
}

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

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

.skill-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  color: var(--white);
  font-size: var(--text-2xl);
}

.skill-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}

.skill-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.skill-tag {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  border: 1px solid var(--border-color);
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.project-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

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

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

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

.project-category {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  background: var(--primary-color);
  color: var(--white);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
}

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

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

.project-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.tech-tag {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  border: 1px solid var(--border-color);
}

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

.project-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--primary-color);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

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

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-12);
  display: flex;
  align-items: center;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-item:nth-child(odd) .timeline-content {
  text-align: right;
  margin-right: var(--space-8);
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: var(--space-8);
}

.timeline-marker {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 48px;
  background: var(--primary-color);
  border: 4px solid var(--bg-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  z-index: 2;
}

.timeline-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  width: calc(50% - var(--space-6));
  position: relative;
  transition: all var(--transition);
}

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

.timeline-badge {
  display: inline-block;
  background: var(--success-color);
  color: var(--white);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.timeline-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.timeline-meta {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
}

.timeline-company {
  color: var(--primary-color);
  font-weight: 600;
}

.timeline-period {
  color: var(--text-secondary);
}

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

.timeline-achievements {
  margin-bottom: var(--space-4);
}

.achievement {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.achievement i {
  color: var(--success-color);
  font-size: var(--text-base);
}

.timeline-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-16);
}

.contact-info {
  display: grid;
  gap: var(--space-6);
}

.contact-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--transition);
}

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

.contact-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  color: var(--white);
}

.contact-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.contact-card p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--primary-color);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

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

.contact-meta i {
  color: var(--success-color);
}

/* Contact Form */
.contact-form-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.form-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.form-header h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

.form-header p {
  color: var(--text-secondary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

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

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

.error-message {
  color: var(--error-color);
  font-size: var(--text-sm);
  margin-top: var(--space-1);
  display: none;
}

.form-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.form-note {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin: 0;
}

.form-note i {
  color: var(--success-color);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-16);
  margin-bottom: var(--space-12);
}

.footer-brand h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}

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

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

.social-link {
  width: 40px;
  height: 40px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.footer-links-section {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.footer-column h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

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

.footer-contact .contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.footer-contact .contact-item i {
  color: var(--primary-color);
}

.footer-contact .contact-item a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-8);
}

.footer-bottom-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer-meta span {
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.scroll-to-top {
  width: 40px;
  height: 40px;
  background: var(--primary-color);
  border: none;
  border-radius: var(--radius-full);
  color: var(--white);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-12);
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
    text-align: center;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
    text-align: center;
  }

  .footer-links-section {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: var(--space-16);
    --text-6xl: 2.5rem;
    --text-5xl: 2rem;
    --text-4xl: 1.75rem;
  }

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

  .nav-menu {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .brand-logo {
    width: 28px;
    height: 28px;
  }

  .brand-text,
  .brand-accent {
    font-size: var(--text-lg);
  }

  .hero-text h1 {
    font-size: var(--text-5xl);
  }

  .hero-actions {
    justify-content: center;
  }

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

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

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    flex-direction: row !important;
  }

  .timeline-item .timeline-content {
    margin-left: var(--space-16) !important;
    margin-right: 0 !important;
    text-align: left !important;
    width: calc(100% - var(--space-20));
  }

  .timeline-marker {
    left: 20px;
    transform: translateX(-50%);
  }

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

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

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .footer-links-section {
    grid-template-columns: 1fr;
  }

  .footer-bottom-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: var(--text-4xl);
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

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

  .modal {
    padding: var(--space-2);
  }

  .modal-content {
    max-height: 95vh;
  }

  .modal-header {
    padding: var(--space-4);
  }

  .modal-body {
    padding: var(--space-4);
  }

  .modal-links {
    flex-direction: column;
  }

  .modal-links .btn {
    width: 100%;
  }
}

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

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

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

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-left {
  animation: fadeInLeft 0.6s ease-out;
}

.animate-fade-in-right {
  animation: fadeInRight 0.6s ease-out;
}

/* Scroll Animations */
.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.scroll-animate.animate {
  opacity: 1;
  transform: translateY(0);
}

/* Loading States */
.loading {
  opacity: 0.7;
  pointer-events: none;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Modal Styles */
.modal {
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  padding: var(--space-4);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition);
}

.modal.active .modal-content {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  margin: 0;
  font-size: var(--text-2xl);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-6);
}

.modal-image {
  margin-bottom: var(--space-6);
}

.modal-image img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: var(--radius);
}

.modal-info h4 {
  margin-bottom: var(--space-3);
}

.modal-info p {
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.modal-tag {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
}

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

/* Accessibility */
.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;
}

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

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --border-color: var(--gray-900);
  }

  [data-theme="dark"] {
    --border-color: var(--white);
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .theme-toggle,
  .mobile-menu-toggle,
  .scroll-to-top {
    display: none;
  }

  body {
    background: var(--bg-primary);
    color: var(--text-primary);
  }

  .section {
    page-break-inside: avoid;
  }
}