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

:root {
  --color-bg: #121212;
  --color-primary: #1f1f1f;
  --color-secondary: #3498db;
  --color-accent: #ff6b6b;
  --color-text: #f0f0f0;
  --font-main: 'Segoe UI', Arial, sans-serif;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background: var(--color-primary);
  color: var(--color-text);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  font-size: 1.8rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

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

nav a:hover,
nav a.active {
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
}

main {
  flex: 1;
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  margin-bottom: 2rem;
}

section h2,
section h3 {
  color: var(--color-secondary);
  margin-bottom: 0.5rem;
}

pre {
  background: #1e1e1e;
  color: var(--color-text);
  padding: 1rem;
  border-radius: 5px;
  overflow-x: auto;
  font-family: Consolas, monospace;
}

img {
  max-width: 100%;
  height: auto;
  margin: 1rem 0;
  border-radius: 4px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}

.logo-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.logo {
  width: 160px;
  height: auto;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
}

footer {
  background: var(--color-primary);
  color: var(--color-text);
  text-align: center;
  padding: 1rem;
  margin-top: auto;
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }

  nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }

  .logo-container {
    flex-direction: column;
  }
}