:root {
  --primary: #cff00b;
  --bg-dark: #0f1115;
  --bg-card: #15181e;
  --bg-card-hover: #1c2025;
  --border-color: #2a2e37;
  --text-display: #ffffff;
  --text-body: #9ca3af;
  --text-tertiary: #6b7280;
  --container-padding: 24px;
  --radius: 12px;
  --sidebar-width: 280px;
}

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

body {
  font-family: "Inter", -apple-system, system-ui, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.text-white {
  color: var(--text-display);
}
.text-primary {
  color: var(--primary);
}
.text-center {
  text-align: center;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text-display);
  font-weight: 700;
  line-height: 1.2;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: opacity 0.2s, transform 0.2s;
  font-size: 14px;
}

.btn:hover {
  opacity: 0.9;
}

.btn-primary {
  background-color: var(--primary);
  color: #000;
}

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

.header {
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
  background: rgba(15, 17, 21, 0.95);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
}

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

.back-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-body);
  font-weight: 600;
  font-size: 14px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.2s;
}

.back-link:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.1);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-display);
}

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

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a {
  color: var(--text-body);
  font-weight: 500;
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--text-display);
}

.hero {
  padding: 80px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.app-icon-hero {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  margin-bottom: 32px;
  border: 1px solid var(--border-color);
}

.hero h1 {
  font-size: 48px;
  letter-spacing: -1px;
  margin-bottom: 20px;
  line-height: 1.1;
}

.hero p {
  font-size: 18px;
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.store-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 12px 24px;
  border-radius: 12px;
  color: var(--text-display);
  min-width: 180px;
  transition: border-color 0.2s;
}

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

.store-btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.store-btn-text span:first-child {
  font-size: 11px;
  color: var(--text-body);
}

.store-btn-text span:last-child {
  font-size: 16px;
  font-weight: 600;
}

.features {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  margin-bottom: 16px;
  font-size: 32px;
  text-align: center;
}

.section-subtitle {
  text-align: center;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  font-size: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background-color: var(--border-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-card {
  background-color: var(--bg-dark);
  padding: 32px;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.feature-card h3 {
  margin-top: 16px;
  margin-bottom: 8px;
  font-size: 18px;
}

.feature-icon {
  color: var(--primary);
  margin-bottom: 16px;
}

.faq {
  padding: 80px 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-card);
  overflow: hidden;
}

.faq-question {
  padding: 20px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text-display);
}

.faq-answer {
  padding: 0 20px 20px;
  display: none;
  font-size: 15px;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

.faq-item.active .faq-answer {
  display: block;
}

.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 14px;
  margin-top: auto;
}

.footer a {
  color: var(--text-body);
  margin: 0 10px;
  font-size: 13px;
}

.footer a:hover {
  color: var(--text-display);
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  color: var(--text-display);
  font-weight: 500;
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-display);
  font-family: inherit;
  font-size: 16px;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
}

.submit-btn {
  width: 100%;
  padding: 16px;
  background-color: var(--primary);
  color: #000;
  border: none;
  border-radius: 8px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  transition: opacity 0.2s;
}

.submit-btn:hover {
  opacity: 0.9;
}

.info-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary);
  color: var(--text-display);
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 24px;
}

.main-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 24px;
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: 60px;
}

.sidebar {
  position: sticky;
  top: 100px;
  height: calc(100vh - 120px);
  overflow-y: auto;
  padding-right: 20px;
}

.sidebar::-webkit-scrollbar {
  width: 4px;
}
.sidebar::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.toc-link {
  display: block;
  color: var(--text-body);
  padding: 8px 12px;
  margin-bottom: 4px;
  border-radius: 6px;
  font-size: 14px;
}

.toc-link:hover {
  color: var(--text-display);
  background: var(--bg-card);
}

.toc-link.active {
  color: var(--primary);
  background: rgba(207, 240, 11, 0.1);
}

.content-section {
  margin-bottom: 60px;
  scroll-margin-top: 100px;
}

.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 24px;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
}

.page-title {
  font-size: 40px;
  margin-bottom: 16px;
}

.page-subtitle {
  font-size: 20px;
  color: var(--text-body);
  max-width: 600px;
}

.last-updated-badge {
  display: inline-flex;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(207, 240, 11, 0.1);
  color: var(--primary);
  border: 1px solid rgba(207, 240, 11, 0.2);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

ul {
  list-style: none;
  padding-left: 20px;
}

li {
  position: relative;
  margin-bottom: 8px;
}

li::before {
  content: "•";
  color: var(--primary);
  position: absolute;
  left: -20px;
  font-weight: bold;
}

.lang-toggles {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  padding: 4px;
  border-radius: 8px;
  display: flex;
  z-index: 100;
}

.lang-btn {
  padding: 8px 12px;
  background: none;
  border: none;
  color: var(--text-body);
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
}

.lang-btn.active {
  background: var(--text-display);
  color: var(--bg-dark);
}

.lang-content.active {
  display: block;
}
.lang-content {
  display: none;
}

@media (max-width: 1024px) {
  .main-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }
  .header .nav-links {
    display: none;
  }
}