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

/* CSS Custom Properties */
:root {
  /* Colors - Dark Theme (Default) */
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;

  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-card: #1e1e3f;
  --bg-glass: rgba(30, 30, 63, 0.8);

  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;

  --border-primary: #27272a;
  --border-secondary: #3f3f46;
  --border-accent: rgba(59, 130, 246, 0.2);

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

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --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-size-7xl: 4.5rem;

  /* 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;
  --space-32: 8rem;

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

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.8);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --border-primary: #e2e8f0;
  --border-secondary: #cbd5e1;
  --border-accent: rgba(59, 130, 246, 0.2);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* Base Styles */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-primary);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-6);
  max-width: 1400px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-weight: 800;
  font-size: var(--font-size-xl);
  letter-spacing: -0.02em;
}

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

.logo-accent {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-8);
  align-items: center;
}

.nav-link {
  position: relative;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--font-size-sm);
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

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

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

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

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

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 60px;
  height: 32px;
  background: var(--bg-secondary);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  overflow: hidden;
}

.theme-toggle:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--border-accent);
}

.theme-toggle-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.theme-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background: var(--primary);
  border-radius: 50%;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
}

[data-theme="light"] .theme-toggle-thumb {
  transform: translateX(24px);
}

.sun-icon,
.moon-icon {
  position: absolute;
  transition: all var(--transition-base);
}

.sun-icon {
  opacity: 0;
  transform: rotate(180deg);
}

.moon-icon {
  opacity: 1;
  transform: rotate(0deg);
}

[data-theme="light"] .sun-icon {
  opacity: 1;
  transform: rotate(0deg);
}

[data-theme="light"] .moon-icon {
  opacity: 0;
  transform: rotate(-180deg);
}

/* Authentication */
.auth-buttons {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  gap: 4px;
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
  border-radius: 2px;
}

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

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

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

/* Mobile Navigation */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 400px;
  height: 100vh;
  background: var(--bg-primary);
  z-index: var(--z-modal);
  transition: right var(--transition-base);
  overflow-y: auto;
}

.mobile-nav.active {
  right: 0;
}

.mobile-nav-content {
  padding: var(--space-6);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
}

.mobile-close {
  width: 44px;
  height: 44px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.mobile-close:hover {
  background: var(--error);
  color: white;
  transform: rotate(90deg);
}

.mobile-nav-menu {
  list-style: none;
  margin-bottom: auto;
}

.mobile-nav-menu li {
  margin-bottom: var(--space-2);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

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

.mobile-nav-link i {
  width: 20px;
  text-align: center;
}

.mobile-nav-footer {
  border-top: 1px solid var(--border-primary);
  padding-top: var(--space-6);
}

.mobile-theme-toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
  font-weight: 500;
}

.mobile-theme-btn {
  width: 50px;
  height: 28px;
}

.mobile-auth-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

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

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-secondary);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
}

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

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

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

.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-base);
  border-radius: var(--radius-xl);
}

.btn-social {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
  flex: 1;
}

.google-auth:hover {
  background: #4285f4;
  color: white;
  border-color: #4285f4;
}

.github-auth:hover {
  background: #333;
  color: white;
  border-color: #333;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 80px;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(59, 130, 246, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.1) 1px, transparent 1px);
  background-size: 50px 50px;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
}

.hero-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  width: 100%;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-accent);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  transition: all var(--transition-base);
}

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

.badge-pulse {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.title-line {
  display: block;
}

.title-highlight {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-gradient {
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  line-height: 1.7;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

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

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

.stat-number {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--space-1);
}

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

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-image-container {
  position: relative;
  width: 100%;
  max-width: 450px;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  height: 550px;
  border-radius: var(--radius-3xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
  animation: float 6s ease-in-out infinite;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
}

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

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  animation: bounce 2s infinite;
}

.scroll-text {
  font-size: var(--font-size-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.scroll-arrow {
  font-size: var(--font-size-lg);
}

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

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

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  color: var(--primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
  border: 1px solid var(--border-accent);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Services Section */
.services {
  padding: var(--space-32) 0;
  background: var(--bg-secondary);
  position: relative;
  z-index: 1;
}

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

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--border-accent);
}

.service-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-6);
}

.service-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-2xl);
  transition: transform var(--transition-base);
}

.service-card:hover .service-icon {
  transform: scale(1.1) rotate(5deg);
}

.service-number {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
}

.service-content {
  flex: 1;
  margin-bottom: var(--space-6);
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.service-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-5);
}

.service-features {
  list-style: none;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-2);
}

.service-features i {
  color: var(--success);
  font-size: var(--font-size-xs);
}

.service-footer {
  margin-top: auto;
}

/* AI Tools Section */
.ai-tools {
  padding: var(--space-32) 0;
  background: var(--bg-primary);
  position: relative;
  z-index: 1;
}

.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
}

.ai-tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.ai-tool-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

.ai-tool-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--border-accent);
}

.tool-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-5);
}

.tool-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-xl);
  transition: transform var(--transition-base);
}

.ai-tool-card:hover .tool-icon {
  transform: scale(1.1) rotate(5deg);
}

.tool-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--success);
}

.status-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.tool-content {
  flex: 1;
  margin-bottom: var(--space-5);
}

.tool-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

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

.tool-features {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.feature-tag {
  background: var(--bg-secondary);
  color: var(--primary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border: 1px solid var(--border-accent);
}

.tool-footer {
  display: flex;
  gap: var(--space-3);
  margin-top: auto;
}

.tool-footer .btn {
  flex: 1;
}

.tool-footer .btn-ghost {
  flex: 0 0 auto;
  width: 44px;
  padding: 0;
}

/* Portfolio Section */
.portfolio {
  padding: var(--space-32) 0;
  background: var(--bg-secondary);
  position: relative;
  z-index: 1;
}

.portfolio-filters {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
  overflow-x: auto;
  padding: var(--space-2) 0;
}

.filter-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  color: var(--text-secondary);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  font-weight: 500;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.filter-count {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 700;
  min-width: 20px;
  text-align: center;
}

.filter-btn.active .filter-count {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

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

.portfolio-item {
  background: var(--bg-card);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--border-primary);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.portfolio-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--border-accent);
}

.portfolio-image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

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

.portfolio-item:hover .portfolio-image img {
  transform: scale(1.1);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-actions {
  display: flex;
  gap: var(--space-3);
}

.portfolio-btn {
  width: 50px;
  height: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.portfolio-btn:hover {
  background: var(--primary);
  color: white;
  transform: scale(1.1);
}

.portfolio-content {
  padding: var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.portfolio-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.portfolio-category {
  color: var(--primary);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.portfolio-date {
  color: var(--text-muted);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.portfolio-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.portfolio-description {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex: 1;
}

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

.tech-tag {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border: 1px solid var(--border-primary);
}

/* About Section */
.about {
  padding: var(--space-32) 0;
  background: var(--bg-primary);
  position: relative;
  z-index: 1;
}

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

.about-text {
  max-width: 600px;
}

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

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

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.skill-category h4 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

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

.skill-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
  transition: all var(--transition-fast);
}

.skill-item:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-accent);
  transform: translateX(5px);
}

.skill-item i {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: var(--font-size-lg);
}

.skill-item span {
  font-weight: 500;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
}

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

.about-visual {
  position: relative;
}

.about-image-container {
  position: relative;
  border-radius: var(--radius-3xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
}

.about-image {
  width: 100%;
  height: 600px;
  object-fit: cover;
}

.about-stats-overlay {
  position: absolute;
  bottom: var(--space-6);
  left: var(--space-6);
  right: var(--space-6);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.stat-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.stat-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.stat-content {
  display: flex;
  flex-direction: column;
}

.stat-card .stat-number {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.stat-card .stat-label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  font-weight: 500;
}

/* Contact Section */
.contact {
  padding: var(--space-32) 0;
  background: var(--bg-secondary);
  position: relative;
  z-index: 1;
}

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

.contact-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-accent);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-4);
}

.contact-details h4 {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.contact-details p {
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.contact-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

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

.social-connect {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.social-connect h4 {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.social-links {
  display: flex;
  gap: var(--space-3);
}

.social-link {
  width: 50px;
  height: 50px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* Contact Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
}

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

.form-header h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

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

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

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

.form-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
}

.form-label i {
  color: var(--primary);
  font-size: var(--font-size-sm);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-4);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-primary);
  box-shadow: 0 0 0 4px var(--border-accent);
}

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

/* Footer */
.footer {
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: var(--space-20) 0 var(--space-8);
  border-top: 1px solid var(--border-primary);
  position: relative;
  z-index: 1;
}

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

.footer-brand {
  max-width: 400px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  font-weight: 800;
  font-size: var(--font-size-xl);
  letter-spacing: -0.02em;
}

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

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-section h4 {
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--space-2);
}

.footer-section a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-primary);
  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-bottom-content p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer-bottom-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

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

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal.active {
  display: flex;
  animation: modalFadeIn 0.3s ease;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.modal-content {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-2xl);
  animation: modalSlideIn 0.3s ease;
}

.tool-modal {
  max-width: 900px;
  max-height: 80vh;
}

.modal-header {
  padding: var(--space-8) var(--space-8) var(--space-4);
  border-bottom: 1px solid var(--border-primary);
  position: relative;
}

.modal-header h2 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.modal-header p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

.modal-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 40px;
  height: 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--error);
  color: white;
  transform: rotate(90deg);
}

.modal-body {
  padding: var(--space-8);
}

/* Auth Form Styles */
.auth-form .form-group {
  margin-bottom: var(--space-5);
}

.password-input {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.password-toggle:hover {
  color: var(--text-primary);
}

.password-strength {
  margin-top: var(--space-3);
}

.strength-meter {
  height: 4px;
  background: var(--border-primary);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: var(--space-2);
}

.strength-bar {
  height: 100%;
  transition: all var(--transition-base);
  border-radius: var(--radius-sm);
}

.strength-text {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  font-weight: 500;
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--primary);
}

.forgot-password {
  color: var(--primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.forgot-password:hover {
  color: var(--primary-dark);
}

.auth-divider {
  text-align: center;
  margin: var(--space-6) 0;
  position: relative;
}

.auth-divider::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border-primary);
}

.auth-divider span {
  background: var(--bg-card);
  padding: 0 var(--space-4);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.social-auth {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.auth-switch {
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

.auth-switch a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

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

/* Scroll to Top */
.scroll-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-lg);
}

.scroll-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

/* Notification System */
.notification-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 400px;
}

.notification {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: slideInRight 0.3s ease;
}

.notification.success {
  border-color: var(--success);
}

.notification.error {
  border-color: var(--error);
}

.notification.warning {
  border-color: var(--warning);
}

.notification.info {
  border-color: var(--primary);
}

.notification-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-1);
  margin-left: auto;
  transition: color var(--transition-fast);
}

.notification-close:hover {
  color: var(--text-primary);
}

/* Animations */
@keyframes modalFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideOutRight {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

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

@keyframes fadeOut {
  from {
    opacity: 1;
    transform: scale(1);
  }
  to {
    opacity: 0;
    transform: scale(0.9);
  }
}

/* Fade-in animation for sections */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

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

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

  .hero-visual {
    order: -1;
  }

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

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 768px) {
  /* Hide desktop navigation */
  .nav-menu {
    display: none;
  }

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

  /* Adjust spacing */
  :root {
    --space-32: 4rem;
  }

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

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

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

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

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

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

  .about-actions {
    flex-direction: column;
  }

  .portfolio-filters {
    justify-content: flex-start;
  }

  .notification-container {
    left: var(--space-4);
    right: var(--space-4);
    max-width: none;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.875rem;
  }

  .services-grid,
  .ai-tools-grid,
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .modal-content {
    margin: var(--space-4);
    max-width: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-primary: #666;
  }

  [data-theme="light"] {
    --border-primary: #999;
  }
}

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

  .hero-grid {
    animation: none;
  }
}

/* Print styles */
@media print {
  .navbar,
  .mobile-nav,
  .scroll-to-top,
  .modal,
  .notification-container {
    display: none !important;
  }

  body {
    color: #000;
    background: #fff;
  }

  .hero-background {
    display: none;
  }
}