:root {
  --main-color: #40e0d0;
  --dark-color: #004d40;
  --light-bg: #e0f7f5;
}

body {
  font-family: "Vazirmatn", sans-serif;
  margin: 0;
  background-color: var(--light-bg);
  color: #222;
}

header {
  background-color: var(--main-color);
  color: white;
  padding: 10px 0;
  position: sticky;
  top: 0;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 30px 40px;
  position:center;
  z-index:1000;
}

.menu {
  list-style: none;
  display: flex;
  gap: 80px;
  padding:center;
  position:center;
}

.menu li {
  position: sticky ;
}

.menu a {
  text-decoration: none;
  color: white;
  transition: 0.3s;
}

.menu a:hover {
  color: var(--dark-color);
}

.submenu {
  display: none;
  position: absolute;
  top: 30px;
  left: 0;
  background: white;
  color: var(--dark-color);
  border-radius: 6px;
}

.dropdown:hover .submenu {
  display: block;
}

.submenu a {
  display: block;
  padding: 8px 15px;
  color: var(--dark-color);
}

.menu-toggle {
  display: none;
  font-size: 28px;
  cursor: pointer;
}

.hero {
  background: url('structure-bg.jpg') center/cover no-repeat;
  height: 30vh;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
}

.section {
  padding: 50px 20px;
  text-align: center;
}

.project-card:hover {
    background: linear-gradient(180deg, #20B2AA, #008B8B); /* رنگ فیروزه‌ای آبی */
    transform: translate(-10%, -10%) scale(1.1); /* دو برابر شدن اندازه */
    z-index: 10;
}

.gallery {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

.project-card {
  background: white;
  border-radius: 10px;
  box-shadow: 0 0 8px rgba(0,0,0,0.2);
  text-align:center;
  overflow: hidden;
  width: 250px;
}

.project-card img {
  width: 100%;
}

.project-card h3 {
  margin: 10px;
}

.project-card a {
  display: block;
  background: var(--main-color);
  color: white;
  padding: 8px;
  text-decoration: none;
}

footer {
  background: var(--dark-color);
  color: white;
  text-align: center;
  padding: 15px 0;
}

@media (max-width: 768px) {
  .menu {
    display: none;
    flex-direction: column;
    background: var(--main-color);
  }
  .menu.active {
    display: flex;
  }
  .menu-toggle {
    display: block;
  }
}

@keyframes rotateLogo {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.logos {
  position: fixed;
  top: 20px; /* یا top: 20px برای گوشه بالا */
  left: 20px;  /* یا left: 20px برای گوشه چپ */
  width: 80px;  /* اندازه دلخواه لوگو */
  animation: rotateLogo 6s linear infinite;
  filter: drop-shadow(0 0 8px rgba(0, 255, 255, 0.5)) brightness(1.2);
  z-index: 9999;
}


@keyframes rotateLogo {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.logo-mobile {
  display: none;
  position: fixed;
  top: 20px;
  left: 20px;
  width: 80px;
  animation: rotateLogo 6s linear infinite;
  filter: drop-shadow(0 0 8px rgba(0, 255, 255, 0.5)) brightness(1.2);
  z-index: 9999;
}

/* فقط در موبایل نمایش داده شود */
@media (max-width: 768px) {
  .logo-mobile  #mobile {
    display: block;
  }
}



@keyframes flipLogo {
  from { transform: rotateY(0deg); }
  to { transform: rotateY(360deg); }
}

.logo-flip {
  animation: flipLogo 4s linear infinite;
  width: 100px;
  transform-style: preserve-3d;
}