/* KARL Landing Page Styles */

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

:root {
  /* Color Palette */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary-color: #667eea;
  --primary-dark: #5a6fd8;
  --secondary-color: #764ba2;
  --accent-color: #f093fb;

  /* Neutral Colors */
  --background: #fafafa;
  --surface: #ffffff;
  --surface-elevated: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border-color: #e5e7eb;
  --border-color-hover: #d1d5db;

  /* Semantic Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

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

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

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

  /* Animation */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.025em;
}

h1 {
  font-size: 3.5rem;
}

h2 {
  font-size: 2.5rem;
}

h3 {
  font-size: 1.875rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.125rem;
}

.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-title {
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-md);
}

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

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  position: relative;
}

/* Make navbar background fully opaque in dark mode to prevent backdrop issues */
.dark-mode .navbar {
  background: #23262f !important;
  backdrop-filter: none !important;
  border-bottom: 1px solid #2d3142;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem var(--space-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
  font-size: 1.25rem;
}

.logo {
  width: 32px;
  height: 32px;
}

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

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

.nav-link {
  font-weight: 500;
  text-decoration: none;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

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

.github-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.5rem 1rem;
  background: var(--surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.github-link:hover {
  /* background: var(--primary-color); */
  transform: translateY(-1px);
}

.github-icon {
  width: 20px;
  height: 20px;
}

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

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

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-4xl) 0;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  opacity: 0.5;
}

.hero .hero-title {
  font-size: 48px;
  font-weight: 900;
  color: var(--heading-color);
  line-height: 1.1;
  margin-bottom: 25px;
  letter-spacing: -0.02em;
}

@media (max-width: 768px) {
  .hero .hero-title {
    font-size: 36px;
  }
}

@media (max-width: 575px) {
  .hero .hero-title {
    font-size: 28px;
  }
}

.hero .hero-title .typed,
#typing-text {
  background: linear-gradient(
    135deg,
    var(--accent-color) 0%,
    color-mix(in srgb, var(--accent-color), #8b5cf6 50%) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

#typing-text::after {
  content: "|";
  color: var(--primary-color);
  animation: blink 1s infinite;
  margin-left: 2px;
}

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

/* Dark mode hero background */
.dark-mode .hero-background {
  background: linear-gradient(135deg, #181a20 0%, #23262f 100%);
  opacity: 0.8;
}

.hero-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(
      circle at 20% 80%,
      rgba(120, 119, 198, 0.3) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(255, 119, 198, 0.3) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 40% 40%,
      rgba(120, 119, 198, 0.2) 0%,
      transparent 50%
    );
  animation: float 20s ease-in-out infinite;
}

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

  33% {
    transform: translateY(-20px) rotate(1deg);
  }

  66% {
    transform: translateY(-10px) rotate(-1deg);
  }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.375rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.5;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

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

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

.version-badge {
  padding: 0.25rem 0.75rem;
  background: var(--warning);
  color: white;
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.version-text {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.hero-demo {
  display: flex;
  justify-content: center;
}

@keyframes arrow-diagonal-slide {
  0% {
    transform: translate(-20px, 20px);
    opacity: 0;
  }

  100% {
    transform: translate(0, 0);
    opacity: 1;
  }
}

a .arrow {
  font-size: 1.2em;
  vertical-align: center;
  display: inline-block;
  transition: transform 0.2s ease;
}

.arrow {
  font-size: 1.2em;
  visibility: hidden;
  margin-left: 0.3em;
  opacity: 0;
  transform: translate(-20px, 20px);
  transition: visibility 0s linear 0.15s;
}

a:hover .arrow {
  visibility: visible;
  animation: arrow-diagonal-slide 0.15s ease-out forwards;
  transition: none;
}

a:focus .arrow {
  visibility: visible;
  animation: arrow-diagonal-slide 0.15s ease-out forwards;
  transition: none;
}

a:focus-visible .arrow {
  visibility: visible;
  animation: arrow-diagonal-slide 0.15s ease-out forwards;
  transition: none;
}

a {
  color: var(--color-text-link);
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 4px;
  position: relative;
}

a:hover {
  color: var(--color-text-link-hover);
  transform: translateY(-1px);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.demo-window {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  max-width: 500px;
  width: 100%;
}

.demo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: #f8f9fa;
  border-bottom: 1px solid var(--border-color);
}

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

.demo-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.demo-dot.red {
  background: #ff5f56;
}

.demo-dot.yellow {
  background: #ffbd2e;
}

.demo-dot.green {
  background: #27ca3f;
}

.demo-title {
  font-weight: 500;
  color: var(--text-secondary);
}

.demo-content {
  padding: var(--space-lg);
}

.demo-gif {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* Features Section */
.features {
  padding: var(--space-4xl) 0;
  background: var(--surface);
}

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

.feature-card {
  padding: var(--space-xl);
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

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

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
  display: block;
}

.feature-title {
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Architecture Section */
.architecture {
  padding: var(--space-4xl) 0;
}

.architecture-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.architecture-diagram {
  position: relative;
  padding: var(--space-xl);
}

.arch-component {
  background: var(--surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  transition: all var(--transition-normal);
}

.arch-component:hover {
  border-color: var(--primary-color);
  transform: scale(1.02);
}

.arch-component h4 {
  color: var(--primary-color);
  margin-bottom: var(--space-sm);
}

.arch-component p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

.arch-detail {
  margin-bottom: var(--space-lg);
}

.arch-detail h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.arch-detail p {
  color: var(--text-secondary);
}

/* Code Examples Section */
.code-examples {
  padding: var(--space-4xl) 0;
  background: var(--surface);
}

.code-example-tabs {
  max-width: 800px;
  margin: 0 auto;
}

.tab-buttons {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-xl);
}

.tab-button {
  padding: var(--space-md) var(--space-xl);
  background: none;
  border: none;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border-bottom: 2px solid transparent;
}

.tab-button.active,
.tab-button:hover {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

pre {
  background: #1a1a1a;
  color: #f8f8f2;
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
}

code {
  font-family: var(--font-mono);
}

/* Use Cases Section */
.use-cases {
  padding: var(--space-4xl) 0;
}

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

.use-case {
  text-align: center;
  padding: var(--space-xl);
}

.use-case-icon {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
  display: block;
}

.use-case h3 {
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.use-case p {
  color: var(--text-secondary);
}

/* Get Started Section */
.get-started {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.get-started-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.get-started .section-title,
.get-started .section-subtitle {
  color: white;
}

.get-started-stats {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.875rem;
  opacity: 0.9;
}

.get-started-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.get-started .btn-primary {
  background: white;
  color: var(--primary-color);
}

.get-started .btn-outline {
  border-color: white;
  color: white;
}

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

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.quick-link {
  color: white;
  text-decoration: none;
  font-size: 0.875rem;
  opacity: 0.9;
  transition: opacity var(--transition-fast);
}

.quick-link:hover {
  opacity: 1;
}

/* Footer */
.footer {
  background: var(--surface);
  color: var(--text-primary);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-4xl);
  margin-bottom: var(--space-xl);
}

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

.footer-logo {
  width: 40px;
  height: 40px;
}

.footer-brand-text {
  font-size: 1.5rem;
  font-weight: 600;
}

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

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

.footer-column h4 {
  margin-bottom: var(--space-md);
  font-weight: 600;
}

.footer-column a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: var(--space-sm);
  transition: color var(--transition-fast);
}

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

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

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

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

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

.footer-social svg {
  width: 24px;
  height: 24px;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }

  .architecture-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .get-started-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }

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

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }

  .dark-mode .nav-links {
    background: #23262f;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  }

  .navbar.mobile-menu-open .nav-links {
    display: flex;
  }

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

  .hero-title {
    font-size: 2.5rem;
  }

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

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

  .use-cases-grid {
    grid-template-columns: 1fr;
  }

  .tab-buttons {
    overflow-x: auto;
  }

  .get-started-stats {
    justify-content: center;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .section-header {
    margin-bottom: var(--space-2xl);
  }

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

  .feature-card {
    padding: var(--space-lg);
  }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  background: var(--background);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 8px;
  transition: background 0.3s;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}

/* Dark Mode Variables */
.dark-mode {
  --background: #181a20;
  --surface: #23262f;
  --surface-elevated: #23262f;
  --text-primary: #f3f4f6;
  --text-secondary: #b0b3c6;
  --text-muted: #9ca3af;
  --border-color: #2d3142;
  --border-color-hover: #3b4252;
  --primary-gradient: linear-gradient(135deg, #23262f 0%, #764ba2 100%);
  --primary-color: #8b5cf6;
  --primary-dark: #5a6fd8;
  --secondary-color: #a78bfa;
  --accent-color: #f093fb;
}

/* Microinteractions & Animations */
.btn-primary {
  border: 2px solid var(--primary-color);
  transition: box-shadow var(--transition-normal),
    transform var(--transition-fast), background 0.2s;
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
}
.btn-secondary {
  transition: box-shadow var(--transition-normal),
    transform var(--transition-fast), background 0.2s;
}
.btn-secondary:hover {
  background: var(--primary-color);
  color: #fff;
}
.btn-outline {
  transition: background 0.2s, color 0.2s;
}
.feature-card {
  box-shadow: var(--shadow-sm);
}
.feature-card:hover {
  background: var(--surface-elevated);
}
.use-case {
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-normal),
    transform var(--transition-fast);
  box-shadow: var(--shadow-sm);
}
.use-case:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px) scale(1.03);
  background: var(--surface-elevated);
}
.nav-link {
  position: relative;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-md);
}
.nav-link:hover {
  background: rgba(102, 126, 234, 0.08);
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.08);
}
.github-link:hover {
  background: var(--primary-color);
  color: #fff;
}
.mobile-menu-toggle {
  transition: background 0.2s;
  border-radius: var(--radius-md);
}
.mobile-menu-toggle:hover {
  background: var(--primary-color);
}
.tab-button.active,
.tab-button:hover {
  background: rgba(102, 126, 234, 0.08);
}
.tab-pane.active {
  animation: fadeIn 0.5s;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.demo-window {
  animation: popIn 1s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes popIn {
  0% {
    opacity: 0;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}
.footer {
  animation: fadeIn 1.2s;
}
@media (max-width: 1024px) {
  .feature-card,
  .use-case {
    margin-bottom: var(--space-lg);
  }
}
@media (max-width: 768px) {
  .feature-card,
  .use-case {
    margin-bottom: var(--space-md);
    padding: var(--space-md);
  }
}
@media (max-width: 480px) {
  .use-case {
    padding: var(--space-lg);
  }
}
/* Dark Mode Toggle Button */
.dark-mode-toggle {
  margin-left: 1.5rem;
  background: var(--surface);
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border 0.2s;
  position: static;
}
.nav-toggle-inline {
  margin-left: 1.5rem;
  position: static;
}
.dark-mode-toggle:hover {
  background: var(--primary-color);
  color: #fff;
}
.dark-mode .dark-mode-toggle {
  background: var(--surface);
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}