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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
    "Helvetica", "Arial", sans-serif;
  background: #ffffff;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: #1a1a1a;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
header {
  border-bottom: 1px solid #f0f0f0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow 0.3s ease;
}

header.scrolled {
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

nav {
  padding: 1rem 2rem;
}

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

.nav-logo a {
  display: block;
  line-height: 0;
}

.nav-logo img {
  height: 36px;
  width: auto;
  transition: transform 0.3s ease;
}

.nav-logo a:hover img {
  transform: scale(1.02);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: #666666;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #1a1a1a;
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: #1a1a1a;
}

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

.nav-links a.active {
  color: #1a1a1a;
}

/* Language Selector */
.language-selector {
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.lang-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: #fafafa;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: #1a1a1a;
  transition: all 0.2s ease;
}

.lang-button:hover {
  background: #f0f0f0;
  border-color: #d0d0d0;
}

.current-lang {
  min-width: 24px;
  text-align: center;
}

.lang-icon {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid #666666;
  transition: transform 0.2s ease;
}

.language-dropdown.show .lang-icon {
  transform: rotate(180deg);
}

.language-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: #ffffff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  min-width: 140px;
  z-index: 1000;
}

.language-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-dropdown button {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  text-align: left;
  border: none;
  background: none;
  color: #666666;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border-bottom: 1px solid #f0f0f0;
}

.language-dropdown button:last-child {
  border-bottom: none;
}

.language-dropdown button:hover {
  background: #fafafa;
  color: #1a1a1a;
}

.language-dropdown button.active {
  color: #1a1a1a;
  font-weight: 600;
}

/* Main Content */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.container {
  text-align: center;
  max-width: 700px;
  width: 100%;
}

/* Page Layout */
.page-container {
  max-width: 900px;
  width: 100%;
  text-align: left;
  padding: 3rem 2rem;
}

.page-header {
  text-align: center;
  margin-bottom: 4rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #f0f0f0;
}

.page-header h1 {
  font-size: 3rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #1a1a1a;
}

.page-subtitle {
  font-size: 1.25rem;
  color: #666666;
  font-weight: 400;
}

/* Content Sections */
.content-section {
  margin-bottom: 3rem;
}

.content-section h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #1a1a1a;
}

.content-section p {
  font-size: 1rem;
  line-height: 1.8;
  color: #666666;
  margin-bottom: 1rem;
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Logo */
.logo-container {
  margin-bottom: 3rem;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeIn 0.8s ease-out;
}

.logo {
  max-width: 280px;
  height: auto;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.02);
}

.divider {
  width: 60px;
  height: 1px;
  background: #e0e0e0;
  margin: 2rem auto;
}

.subtitle {
  font-size: 1.25rem;
  font-weight: 400;
  color: #666666;
  margin-bottom: 2rem;
  line-height: 1.6;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.description {
  font-size: 1rem;
  color: #888888;
  line-height: 1.8;
  margin-bottom: 3rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.coming-soon {
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: #999999;
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* Info Section */
.info-section {
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid #f0f0f0;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
  text-align: left;
}

.info-item {
  padding: 1.5rem;
  background: #fafafa;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.info-item:hover {
  background: #ffffff;
  border-color: #e0e0e0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.info-item h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: #999999;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.75rem;
  transition: color 0.3s ease;
}

.info-item:hover h3 {
  color: #1a1a1a;
}

.info-item p {
  font-size: 1rem;
  color: #1a1a1a;
  line-height: 1.6;
}

.info-item a {
  color: #1a1a1a;
  text-decoration: none;
}

.info-item a:hover {
  color: #666666;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  padding: 2rem;
  background: #fafafa;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: all 0.3s ease;
  cursor: default;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  background: #ffffff;
  border-color: #e0e0e0;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: #1a1a1a;
}

.feature-card p {
  font-size: 0.9375rem;
  color: #666666;
  line-height: 1.6;
}

/* Security Grid */
.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.security-item {
  padding: 2rem;
  background: #fafafa;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.security-item:hover {
  background: #ffffff;
  border-color: #e0e0e0;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.07);
  transform: translateY(-3px);
}

.security-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: #1a1a1a;
}

.security-item p {
  font-size: 0.9375rem;
  color: #666666;
  line-height: 1.6;
}

/* FAQ */
.faq-item {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #f0f0f0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: #1a1a1a;
}

.faq-item p {
  font-size: 1rem;
  color: #666666;
  line-height: 1.8;
}

/* Footer */
footer {
  padding: 2rem;
  text-align: center;
  border-top: 1px solid #f0f0f0;
  background: #fafafa;
}

footer p {
  font-size: 0.875rem;
  color: #999999;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
  nav {
    padding: 1rem;
  }

  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-logo img {
    height: 32px;
  }

  .nav-links {
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .language-selector {
    margin-top: 0.5rem;
  }

  .page-container {
    padding: 2rem 1.5rem;
  }

  .page-header h1 {
    font-size: 2rem;
  }

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

  .logo {
    max-width: 220px;
  }

  .subtitle {
    font-size: 1.125rem;
  }

  .description {
    font-size: 0.9375rem;
  }

  .info-grid,
  .features-grid,
  .security-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .info-item,
  .feature-card,
  .security-item {
    padding: 1rem;
  }
}