html,
body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #4facfe 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #2d3748;
  padding: 20px 0;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
      circle at 20% 20%,
      rgba(255, 255, 255, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 80%,
      rgba(255, 255, 255, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 40% 40%,
      rgba(255, 255, 255, 0.05) 0%,
      transparent 50%
    );
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 900px;
  width: 90%;
  text-align: center;
  padding: 60px 40px;
  background: #add8e6;
  backdrop-filter: blur(10px);
  border-radius: 24px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15),
    0 0 0 1px rgba(255, 255, 255, 0.2);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.logo {
  font-size: 80px;
  color: #1e3c72;
  margin-bottom: 25px;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.title {
  font-size: 48px;
  font-weight: 700;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.subtitle {
  font-size: 20px;
  color: #4a5568;
  margin-bottom: 50px;
  line-height: 1.7;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

a {
  color: #2a5298;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

a:hover {
  color: #1e3c72;
  text-decoration: underline;
}

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin: 60px 0;
}

.feature {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  padding: 40px 30px;
  border-radius: 16px;
  border: 2px solid #e2e8f0;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.feature:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(30, 60, 114, 0.15);
  border-color: #2a5298;
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 20px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.feature-title {
  font-size: 20px;
  font-weight: 600;
  color: #1a202c;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 15px;
  color: #4a5568;
  line-height: 1.6;
}

.how-it-works {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  padding: 45px 40px;
  border-radius: 16px;
  border: 2px solid #e2e8f0;
  margin: 60px 0;
  text-align: left;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.how-it-works h3 {
  color: #1a202c;
  font-weight: 600;
  text-align: center;
  margin-bottom: 35px;
  font-size: 24px;
}

.step {
  display: flex;
  align-items: flex-start;
  margin-bottom: 25px;
  gap: 20px;
}

.step-number {
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
  font-size: 16px;
  box-shadow: 0 4px 12px rgba(30, 60, 114, 0.3);
}

.step-text {
  color: #2d3748;
  line-height: 1.7;
  font-size: 16px;
}

.step-text code {
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  color: white;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
}

.code-example {
  background: #1a202c;
  color: #e2e8f0;
  padding: 20px;
  border-radius: 12px;
  font-family: "Courier New", monospace;
  font-size: 15px;
  margin: 15px 0;
  border: 1px solid #2d3748;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

footer {
  margin-top: 50px;
  padding: 30px;
  color: #4a5568;
  font-size: 15px;
  border-top: 2px solid #e2e8f0;
}

footer p {
  margin: 0;
}

/* Comprehensive responsive design */
@media (max-width: 1200px) {
  .container {
    max-width: 800px;
    padding: 50px 35px;
  }
}

@media (max-width: 992px) {
  .container {
    max-width: 700px;
    padding: 45px 30px;
  }

  .title {
    font-size: 42px;
  }

  .logo {
    font-size: 70px;
  }
}

@media (max-width: 768px) {
  body {
    padding: 15px 0;
  }

  .container {
    width: 95%;
    padding: 40px 25px;
    border-radius: 20px;
  }

  .title {
    font-size: 36px;
  }

  .logo {
    font-size: 60px;
  }

  .subtitle {
    font-size: 18px;
    margin-bottom: 40px;
  }

  .features {
    grid-template-columns: 1fr;
    gap: 25px;
    margin: 50px 0;
  }

  .feature {
    padding: 35px 25px;
  }

  .how-it-works {
    padding: 35px 25px;
    margin: 50px 0;
  }

  .how-it-works h3 {
    font-size: 22px;
  }
}

@media (max-width: 480px) {
  .container {
    width: 98%;
    padding: 30px 20px;
    border-radius: 16px;
  }

  .title {
    font-size: 28px;
  }

  .logo {
    font-size: 50px;
  }

  .subtitle {
    font-size: 16px;
  }

  .features {
    gap: 20px;
  }

  .feature {
    padding: 30px 20px;
  }

  .feature-icon {
    font-size: 40px;
  }

  .feature-title {
    font-size: 18px;
  }

  .how-it-works {
    padding: 25px 20px;
  }

  .step {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 15px;
  }

  .step-text {
    text-align: left;
  }
}