:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-secondary: #10b981;
  --color-accent: #f59e0b;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-bg: #ffffff;
  --color-bg-alt: #f9fafb;
  --color-border: #e5e7eb;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-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;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

  --transition: all 0.3s ease;
  --animation-duration: 0.6s;
}

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

html {
  scroll-behavior: smooth;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

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

.nav-brand h1 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

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

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  gap: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* Language Switcher */
.language-switcher {
  display: flex;
  gap: var(--spacing-xs);
  margin-left: var(--spacing-lg);
}

.lang-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  min-width: 40px;
}

.lang-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.lang-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

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

/* Hero Section */
.hero {
  padding: 8rem var(--spacing-md) 6rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.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 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.highlight {
  background: linear-gradient(45deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

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

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

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
}

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

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

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 400px;
}

.floating-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: float var(--animation-duration) ease-in-out infinite alternate;
}

.floating-card:nth-child(1) {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.floating-card:nth-child(2) {
  top: 50%;
  right: 20%;
  animation-delay: 0.2s;
}

.floating-card:nth-child(3) {
  bottom: 20%;
  left: 30%;
  animation-delay: 0.4s;
}

.floating-card .card-icon {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-sm);
}

.floating-card h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.floating-card p {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

@keyframes float {
  to {
    transform: translateY(-10px);
  }
}

/* Sections */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

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

/* Understanding Section */
.understanding-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.understanding-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

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

.understanding-card .card-icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
  display: block;
}

.understanding-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

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

/* Examples Section */
.examples-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.example-card {
  background: white;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.example-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.example-image {
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-4xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.example-content {
  padding: var(--spacing-xl);
}

.example-content h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.example-content p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.example-impact {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-success);
  background: rgba(16, 185, 129, 0.1);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  display: inline-block;
}

/* Fears Section */
.fears-content {
  max-width: 800px;
  margin: 0 auto;
}

.fear-item {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.fear-question {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.fear-icon {
  font-size: var(--font-size-2xl);
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(37, 99, 235, 0.1);
  border-radius: 50%;
  flex-shrink: 0;
}

.fear-question h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
}

.fear-answer p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.fear-action {
  background: rgba(16, 185, 129, 0.1);
  border-left: 4px solid var(--color-success);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.fear-action strong {
  color: var(--color-success);
}

/* Confidence Section */
.confidence-strategies {
  display: grid;
  gap: var(--spacing-xl);
}

.strategy-card {
  display: flex;
  gap: var(--spacing-xl);
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.strategy-card:hover {
  box-shadow: var(--shadow-md);
}

.strategy-number {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  font-weight: 700;
  flex-shrink: 0;
}

.strategy-content h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.strategy-content p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.strategy-tips {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.strategy-tips li {
  color: var(--color-text-light);
  padding-left: var(--spacing-lg);
  position: relative;
}

.strategy-tips li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 600;
}

/* Action Section */
.action-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.action-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: var(--transition);
}

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

.action-icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
  display: block;
}

.action-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.action-card p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

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

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

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.cta-content h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

.cta-content p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
}

/* Footer */
.footer {
  background: var(--color-text);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h3,
.footer-section h4 {
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
}

.footer-section p {
  opacity: 0.8;
  line-height: 1.7;
}

.footer-section ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: var(--transition);
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-xl);
  text-align: center;
  opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: flex;
  }

  .language-switcher {
    margin-left: 0;
    margin-top: var(--spacing-sm);
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    flex-direction: column;
    padding: 1rem;
    transform: translateY(-20px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    display: flex;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

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

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

  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    text-align: center;
  }

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

  .hero-cta {
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero-visual {
    height: 300px;
  }

  .strategy-card {
    flex-direction: column;
    text-align: center;
  }

  .fear-question {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }

  .container {
    padding: 0 var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 9rem var(--spacing-md) 6rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 8rem var(--spacing-md) 4rem;
  }

  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .section-header h2 {
    font-size: var(--font-size-2xl);
  }

  .understanding-grid,
  .examples-grid,
  .action-grid {
    grid-template-columns: 1fr;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .floating-card {
    animation: none;
  }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.nav-link:focus,
.action-link:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}