header {
      background-color: #0d3b2e;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 25px;
      position: relative;
      z-index: 1000;
    }


/* کانتینر اصلی سه‌ستونی */
.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1280px;
}
/* بخش‌ها */
.left-header,
.center-header,
.right-header {
  flex: 1;
}

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

.center-header {
  text-align: center;
}

.right-header {
  text-align: right;
}

/* لوگو */
.center-header img {
  height: 85px;
  margin: 0 auto;
  align-self: center;
  display: block;
}

/* دکمه زبان */
.lang-switch {
  background-color: white;
  color: #0d3b2e;
  border: none;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-family: 'Vazirmatn', sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.lang-switch:hover {
  background-color: #eaffef;
}

/* منو اصلی */
nav ul {
  list-style: none;
  display: flex;
  justify-content: flex-end;
  gap: 22px;
  margin: 0;
  padding: 0;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  font-family: 'Vazirmatn', sans-serif;
  transition: color 0.2s ease;
}

nav ul li a:hover,
nav ul li a.active {
  color: #d8ffe1;
}

/* دکمه منو موبایل */
.menu-toggle {
  font-size: 26px;
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  display: none;
}

/* واکنش‌گرایی (Mobile) */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  nav {
    display: none;
    position: absolute;
    top: 75px;
    right: 15px;
    width: 220px;
    background-color: #0d3b2e;
    border-radius: 10px;
  }

  nav.open {
    display: flex;
    flex-direction: column;
    padding: 15px;
  }

  nav ul {
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
  }

  nav ul li {
    margin: 5px 0;
  }
}