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

:root {
  --primary-color: #00ff88;
  --primary-dark: #00cc70;
  --text-light: #ffffff;
  --text-gray: #a0a0a0;
  --bg-dark: #1a1a1a;
  --bg-darker: #2d2d2d;
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.1);
  --gradient-primary: linear-gradient(45deg, #00ff88, #00cc70);
  --gradient-dark: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--gradient-dark);
  color: var(--text-light);
  min-height: 100vh;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  scroll-behavior: smooth;
}

.header {
  background: rgba(0, 0, 0, 0.2);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--card-border);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  gap: 2rem;
}

.nav-menu a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px 40px;
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.main-content {
  display: flex;
  flex-direction: column;
  gap: 80px;
  align-items: center;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 32px;
  margin-bottom: 16px;
  background: linear-gradient(45deg, var(--primary-color), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  color: var(--text-gray);
  font-size: 18px;
}

.hero-section {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 40px 0;
}

.card {
  background: var(--card-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 40px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--card-border);
  width: 100%;
  max-width: 480px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: fadeIn 0.8s ease-out;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 255, 136, 0.15);
}

.logo {
  font-size: 48px;
  margin-bottom: 20px;
  animation: bounce 2s infinite;
}

h1 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 12px;
  background: linear-gradient(45deg, #00ff88, #00cc70);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: #a0a0a0;
  margin-bottom: 32px;
  font-size: 16px;
}

button {
  background: var(--gradient-primary);
  border: none;
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  width: 100%;
  max-width: 300px;
  color: #000;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.4);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(0, 255, 136, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 255, 136, 0);
  }
}

button:active {
  transform: translateY(0);
}

.button-loader {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid #000;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 1s linear infinite;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

button.loading .button-text {
  opacity: 0;
}

button.loading .button-loader {
  display: block;
}

.status-message {
  margin-top: 20px;
  font-size: 14px;
  min-height: 20px;
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .header-content {
    padding: 1rem;
  }

  .nav-menu {
    display: none;
  }

  .container {
    padding-top: 60px;
    gap: 60px;
  }

  .main-content {
    gap: 60px;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .topics-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
  }

  .topic-card {
    padding: 30px 20px;
  }

  .footer-content {
    gap: 40px;
  }
}

@media (max-width: 480px) {
  body {
    padding: 20px 10px;
  }

  .card {
    padding: 30px 20px;
  }

  h1 {
    font-size: 24px;
  }

  .subtitle {
    font-size: 14px;
  }

  button {
    padding: 14px 28px;
    font-size: 15px;
  }

  .topics-section h2 {
    font-size: 20px;
    margin-bottom: 30px;
  }

  .footer {
    padding: 40px 20px 20px;
  }

  .footer-section h4 {
    font-size: 16px;
    margin-bottom: 15px;
  }

  .section-header h2 {
    font-size: 24px;
  }

  .section-subtitle {
    font-size: 16px;
  }

  .stat-item {
    padding: 20px;
  }

  .stat-number {
    font-size: 24px;
  }
}

.topics-section {
  width: 100%;
  text-align: center;
}

.topics-section h2 {
  font-size: 24px;
  margin-bottom: 40px;
  background: linear-gradient(45deg, #00ff88, #00cc70);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  margin-top: 20px;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.topic-card {
  background: var(--card-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 40px 30px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--card-border);
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.8s ease-out;
  animation-fill-mode: both;
}

.topic-card:nth-child(1) { animation-delay: 0.2s; }
.topic-card:nth-child(2) { animation-delay: 0.4s; }
.topic-card:nth-child(3) { animation-delay: 0.6s; }

.topic-card:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 12px 40px rgba(0, 255, 136, 0.15);
}

.topic-card i {
  font-size: 32px;
  color: #00ff88;
  margin-bottom: 20px;
}

.topic-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: #fff;
}

.topic-card p {
  color: #a0a0a0;
  font-size: 14px;
  line-height: 1.6;
}

.about-section {
  width: 100%;
  text-align: center;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  max-width: 1000px;
  margin: 0 auto;
  text-align: left;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-text p {
  color: var(--text-gray);
  line-height: 1.8;
  font-size: 16px;
}

.about-features {
  list-style: none;
}

.about-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--text-gray);
}

.about-features i {
  color: var(--primary-color);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  align-items: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 30px;
  background: var(--card-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  border: 1px solid var(--card-border);
  transition: transform 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-5px);
}

.stat-number {
  font-size: 32px;
  font-weight: 600;
  color: var(--primary-color);
}

.stat-label {
  color: var(--text-gray);
  font-size: 14px;
}

.footer {
  margin-top: auto;
  background: rgba(0, 0, 0, 0.2);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  padding: 60px 20px 20px;
  width: 100%;
  border-top: 1px solid var(--card-border);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 60px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-logo i {
  font-size: 24px;
  color: var(--primary-color);
}

.footer-logo h4 {
  font-size: 24px;
  color: var(--primary-color);
}

.footer-section h4 {
  color: #00ff88;
  font-size: 18px;
  margin-bottom: 20px;
}

.footer-section p {
  color: #a0a0a0;
  line-height: 1.6;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 12px;
}

.footer-section ul li a {
  color: #a0a0a0;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section ul li a:hover {
  color: #00ff88;
}

.social-links {
  display: flex;
  gap: 20px;
}

.social-links a {
  color: #a0a0a0;
  font-size: 20px;
  transition: color 0.3s ease;
}

.social-links a:hover {
  color: #00ff88;
}

.footer-bottom {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: #a0a0a0;
  font-size: 14px;
}

.trust-badges {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 20px 0;
  flex-wrap: wrap;
}

.trust-badges span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-gray);
  background: rgba(255, 255, 255, 0.05);
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid var(--card-border);
  transition: all 0.3s ease;
}

.trust-badges span:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.trust-badges i {
  color: var(--primary-color);
}

.security-features, .community-features {
  margin-top: 30px;
}

.security-features h3, .community-features h3 {
  color: var(--primary-color);
  margin-bottom: 15px;
  font-size: 18px;
}

.footer-badges {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.footer-badges span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-gray);
}

.footer-badges i {
  color: var(--primary-color);
}

.faq-section {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.faq-item {
  background: var(--card-bg);
  border-radius: 16px;
  border: 1px solid var(--card-border);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 255, 136, 0.1);
}

.faq-question {
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.05);
}

.faq-question h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-light);
  margin: 0;
}

.faq-question i {
  color: var(--primary-color);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 0 20px 20px;
  max-height: 500px;
}

.faq-answer p {
  color: var(--text-gray);
  line-height: 1.6;
  margin: 0;
}

.testimonials-section {
  width: 100%;
  padding: 40px 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.testimonial-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 30px;
  border: 1px solid var(--card-border);
  transition: all 0.3s ease;
  animation: fadeIn 0.8s ease-out;
}

.testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 255, 136, 0.15);
}

.testimonial-content {
  position: relative;
  margin-bottom: 20px;
}

.testimonial-content i {
  color: var(--primary-color);
  font-size: 24px;
  margin-bottom: 15px;
  opacity: 0.5;
}

.testimonial-content p {
  color: var(--text-light);
  line-height: 1.6;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 15px;
}

.testimonial-author img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
}

.author-info h4 {
  color: var(--text-light);
  margin: 0;
  font-size: 16px;
}

.author-info span {
  color: var(--text-gray);
  font-size: 14px;
}

.partners-section {
  width: 100%;
  padding: 40px 0;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.partner-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  border: 1px solid var(--card-border);
  transition: all 0.3s ease;
  animation: fadeIn 0.8s ease-out;
}

.partner-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 255, 136, 0.15);
}

.partner-card i {
  font-size: 32px;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.partner-card h3 {
  color: var(--text-light);
  margin-bottom: 10px;
  font-size: 18px;
}

.partner-card p {
  color: var(--text-gray);
  font-size: 14px;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .testimonials-grid,
  .partners-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
  }

  .faq-question h3 {
    font-size: 15px;
  }

  .testimonial-card,
  .partner-card {
    padding: 20px;
  }
}