:root {
  --main-color: #2b7a78;
  --accent-color: #3aafa9;
  --background: #f0f4f8;
  --text: #222;
  --white: #fff;
}

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

body {
  font-family: system-ui, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
}

header {
  background: var(--main-color);
  color: var(--white);
  padding: 1rem;
  position: relative;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

#menu-toggle {
  display: none;
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 2rem;
  background: none;
  border: none;
  color: var(--white);
  cursor: pointer;
}

nav {
  background: var(--accent-color);
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

nav li {
  margin: 0.5rem;
}

nav a {
  color: var(--white);
  text-decoration: none;
  padding: 0.5rem 1rem;
  display: block;
  transition: background 0.3s ease;
}

nav a:hover {
  background: rgba(255, 255, 255, 0.2);
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

article {
  background: var(--white);
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 0.5rem;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

footer {
  background: var(--main-color);
  color: var(--white);
  text-align: center;
  padding: 1rem;
}

footer a {
  color: var(--white);
  text-decoration: underline;
}

.ad-box {
  background: #ccc;
  height: 150px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Responsive Menü */

@media (max-width: 768px) {
  #menu-toggle {
    display: block;
  }

  nav {
    display: none;
    flex-direction: column;
  }

  nav.open {
    display: flex;
  }

  nav ul {
    flex-direction: column;
    align-items: center;
  }
}