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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #000000;
  background: #ffffff;
  min-height: 200vh;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  background: #ff0000;
  color: #ffffff;
  padding: 60px 0;
  text-align: center;
  border-bottom: 4px solid #000000;
}

header h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.tagline {
  font-size: 1.2rem;
  opacity: 0.95;
}

main {
  padding: 60px 20px;
}

section {
  margin-bottom: 80px;
}

h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: #ff0000;
  border-bottom: 3px solid #ff0000;
  padding-bottom: 10px;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: #000000;
}

h4 {
  font-size: 1.2rem;
  margin: 25px 0 10px 0;
  color: #000000;
}

p {
  margin-bottom: 15px;
  font-size: 1.1rem;
}

.button-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 30px 0;
}

.btn {
  padding: 12px 24px;
  background: #ff0000;
  color: #ffffff;
  border: 2px solid #ff0000;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn:hover {
  background: #cc0000;
  border-color: #cc0000;
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-secondary {
  background: #ffffff;
  color: #ff0000;
  border: 2px solid #ff0000;
}

.btn-secondary:hover {
  background: #ff0000;
  color: #ffffff;
}

.demo-box {
  height: 300px;
  overflow-y: auto;
  background: #f5f5f5;
  border: 2px solid #000000;
  border-radius: 8px;
  padding: 20px;
  margin: 30px 0;
}

.demo-box h3 {
  margin-top: 0;
  color: #ff0000;
}

.install-step {
  margin: 30px 0;
}

.code-block {
  background: #000000;
  color: #ffffff;
  padding: 20px;
  border-radius: 4px;
  overflow-x: auto;
  margin: 15px 0;
  border: 2px solid #ff0000;
}

.code-block code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.95rem;
  line-height: 1.8;
  white-space: pre;
  display: block;
}

.options-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: #ffffff;
  border: 2px solid #000000;
}

.options-table th {
  background: #ff0000;
  color: #ffffff;
  padding: 15px;
  text-align: left;
  font-weight: 600;
  border: 1px solid #000000;
}

.options-table td {
  padding: 12px 15px;
  border: 1px solid #000000;
}

.options-table tbody tr:nth-child(even) {
  background: #f5f5f5;
}

.options-table code {
  background: #000000;
  color: #ffffff;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9rem;
}

.example-block {
  margin: 30px 0;
}

.step {
  display: flex;
  gap: 20px;
  margin: 30px 0;
  align-items: flex-start;
}

.step-number {
  background: #ff0000;
  color: #ffffff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
}

.step-content h3 {
  margin-top: 5px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin: 30px 0;
}

.feature {
  border: 2px solid #ff0000;
  border-radius: 8px;
  padding: 25px;
  background: #ffffff;
  transition: all 0.2s;
}

.feature:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(255, 0, 0, 0.2);
}

.feature h3 {
  color: #ff0000;
  margin-bottom: 10px;
}

footer {
  background: #000000;
  color: #ffffff;
  padding: 40px 0;
  text-align: center;
  border-top: 4px solid #ff0000;
}

footer p {
  margin: 10px 0;
}

footer a {
  color: #ff0000;
  text-decoration: none;
  font-weight: 600;
  margin: 0 10px;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }

  .tagline {
    font-size: 1rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .button-group {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .step {
    flex-direction: column;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }
}