:root {
  --primary-color: #26598e;
  --secondary-color: #4e4be4;
  --background-color: #ffffff;
  --surface-color: #f2f2f7;
  --surface-hover: #e8e8ed;
  --text-primary: #000000;
  --text-secondary: #6d6d80;
  --border-color: #c6c6c8;
  --shadow: 0 2px 16px rgba(0, 0, 0, 0.1);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

:root.dark {
  --background-color: #000000;
  --surface-color: #1c1c1e;
  --surface-hover: #2c2c2e;
  --text-primary: #ffffff;
  --text-secondary: #8e8e93;
  --border-color: #38383a;
  --shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  transition: var(--transition);
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  gap: 8px;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 122, 255, 0.3);
}

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

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

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 48px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 60px;
  color: var(--primary-color);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

:root.dark .header {
  background-color: rgba(0, 0, 0, 0.8);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 20px;
  font-weight: 700;
}

.logo img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav {
  display: flex;
  gap: 32px;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary-color);
  border-radius: 1px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-selector {
  position: relative;
}

.lang-button {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: none;
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 8px;
  transition: var(--transition);
}

.lang-button:hover {
  background-color: var(--surface-color);
}

.chevron {
  transition: var(--transition);
}

.lang-selector.active .chevron {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  min-width: 150px;
  z-index: 1001;
}

.lang-option {
  display: block;
  width: 100%;
  padding: 12px 16px;
  border: none;
  background: none;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.lang-option:hover {
  background-color: var(--surface-color);
}

.lang-option.active {
  color: var(--primary-color);
  font-weight: 600;
}

.theme-toggle,
.github-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 8px;
  transition: var(--transition);
  text-decoration: none;
}

.theme-toggle:hover,
.github-link:hover {
  background-color: var(--surface-color);
  color: var(--text-primary);
}

:root:not(.dark) .icon-moon,
:root.dark .icon-sun {
  display: none;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  border: none;
  background: none;
  cursor: pointer;
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition);
}

.footer {
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

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

.footer-brand .logo span {
  font-size: 24px;
}

.description {
  color: var(--text-secondary);
  max-width: 400px;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
  justify-self: end;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 14px;
}

.home {
  padding-top: 80px;
}

.hero {
  background: var(--background-color);
  padding: 120px 0 80px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.blob {
  position: absolute;
  filter: blur(80px);
  z-index: 0;
  opacity: 0.4;
  animation: blob-bounce 10s infinite ease-in-out alternate;
}

.blob-1 {
  top: -10%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
}

.blob-2 {
  bottom: -10%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--secondary-color) 0%, transparent 70%);
  animation-delay: -5s;
}

@keyframes blob-bounce {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(30px, 30px) scale(1.1); }
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.animate-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

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

.hero-title {
  font-size: 64px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.hero-subtitle {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-description {
  font-size: 20px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 40px;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 20px;
  margin-bottom: 40px;
}

.glow-effect {
  position: relative;
  overflow: hidden;
}

.platform-badges {
  display: flex;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.platform-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 12px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 80px;
  text-decoration: none;
}

.platform-badge:hover {
  background: var(--surface-hover);
  border-color: var(--primary-color);
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.platform-badge img {
  height: 28px;
  width: 28px;
  object-fit: contain;
}

.platform-badge span {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

:root.dark .platform-badge {
  background: rgba(30, 30, 30, 0.5);
}

.hero-image-container {
  position: relative;
  perspective: 1000px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
  border-radius: 24px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.2);
}

.hero-image {
  width: 100%;
  height: auto;
  border-radius: 24px;
  display: block;
}

.image-glow {
  position: absolute;
  top: 10%;
  left: 10%;
  right: 10%;
  bottom: 10%;
  background: var(--primary-color);
  filter: blur(60px);
  opacity: 0.4;
  z-index: -1;
}

.floating {
  animation: float 6s ease-in-out infinite;
}

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

.features-grid {
  display: flex;
  flex-direction: column;
  gap: 120px;
}

.feature-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.feature-card.reverse {
  direction: rtl;
}

.feature-card.reverse > * {
  direction: ltr;
}

.feature-image img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.feature-card:hover .feature-image img {
  transform: scale(1.02);
}

.feature-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.feature-description {
  font-size: 18px;
  color: var(--text-secondary);
}

.download-page {
  padding-top: 80px;
}

.download-hero {
  background: linear-gradient(135deg, var(--background-color), var(--surface-color));
  padding: 80px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.download-title {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--primary-color);
}

.download-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
}

.pricing-info-card {
  display: inline-flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 32px;
  padding: 16px 20px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  max-width: 600px;
  text-align: left;
}

.info-icon-wrapper {
  color: var(--primary-color);
  display: flex;
  margin-top: 2px;
}

.info-text {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  margin: 0;
}

.download-content {
  padding: 60px 0;
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.platform-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  transition: var(--transition);
}

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

.platform-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.platform-icon img {
  width: 28px;
  height: 28px;
}

.platform-header h3 {
  font-size: 20px;
  margin: 0;
}

.platform-items {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.download-item-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s ease;
}

.download-item-button:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateX(2px);
}

.download-item-button.is-primary {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.badge-row {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--primary-color);
}

.download-item-button.is-primary .badge-row {
  color: rgba(255, 255, 255, 0.9);
}

.download-version {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--text-secondary);
}

.download-item-button.is-unavailable {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.download-item-button.is-unavailable .unavailable-hint {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  color: var(--text-secondary);
}

.download-item-button.is-primary.is-unavailable {
  background-color: var(--surface-color);
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.inline-badge-icon {
  display: inline-flex;
  align-items: center;
  vertical-align: -2px;
  color: var(--primary-color);
  margin: 0 2px;
}

.policy-page {
  padding-top: 120px;
  padding-bottom: 80px;
  min-height: 100vh;
}

.policy-container {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--surface-color);
  border-radius: 20px;
  padding: 60px;
  box-shadow: var(--shadow);
}

.policy-content h1 {
  font-size: 48px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 40px;
  text-align: center;
}

.policy-content hr {
  border: none;
  height: 2px;
  background-color: var(--primary-color);
  margin: 40px 0;
}

.policy-content h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 40px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 8px;
}

.policy-content p,
.policy-content li {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.policy-content ul {
  margin: 16px 0;
  padding-left: 20px;
}

.policy-content a {
  color: var(--primary-color);
  text-decoration: none;
}

.policy-content a:hover {
  text-decoration: underline;
}

@media (max-width: 1024px) {
  .hero-content,
  .feature-card {
    grid-template-columns: 1fr;
    gap: 60px;
    text-align: center;
  }

  .hero-title { font-size: 48px; }
  .hero-subtitle { font-size: 24px; }
  .hero-description {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .platform-badges,
  .hero-actions {
    justify-content: center;
  }

  .feature-card.reverse { direction: ltr; }
  .features-grid { gap: 80px; }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-title { font-size: 36px; margin-bottom: 40px; }

  .nav {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--background-color);
    border-top: 1px solid var(--border-color);
    flex-direction: column;
    padding: 20px;
    gap: 20px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

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

  .nav-link.active::after { display: none; }
  .menu-toggle { display: flex; }
  .header-actions { gap: 8px; }
  .lang-button { padding: 8px; }

  .hero { padding: 100px 0 60px; }
  .hero-title { font-size: 36px; }
  .blob { opacity: 0.2; }

  .download-title { font-size: 32px; }
  .platforms-grid { grid-template-columns: 1fr; }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-links { justify-self: center; }
  .policy-container { padding: 40px 20px; }
  .policy-content h1 { font-size: 36px; }
}