.site-header {
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
  position: sticky;
  top: 0;
  z-index: 2000;
  width: 100%;
  transition: box-shadow 0.3s ease;
}

body.scrolled .site-header {
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 15px 25px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 20px;
}

.logo img {
  max-width: 200px;
  height: auto;
  display: block;
}

.main-nav {
  flex: 1;
  text-align: center;
}

.main-nav ul {
  list-style: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin: 0;
  padding: 0;
}

.main-nav li {
  text-align: center;
  line-height: 1.3;
}

.main-nav a {
  text-decoration: none;
  font-family: "Montserrat", sans-serif;
  font-weight: 600;
  font-size: 15px;
  color: #333;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: #8d2424;
}

.header-banner {
  background-image: url("/files/header.png");
  background-repeat: no-repeat;
  background-position: center 45%;
  background-size: cover;
  width: 100%;
  max-width: 1100px;
  height: 550px;
  margin: 0 auto;
  border-radius: 0;
  display: block;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 3001;
}

.hamburger span {
  display: block;
  height: 3px;
  width: 100%;
  background: #333;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

#nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0);
  z-index: 250;
  pointer-events: none;
  transition: background 0.3s ease;
}

#nav-overlay.show {
  background: rgba(0,0,0,0.25);
  pointer-events: auto;
}

@media (max-width: 768px) {
  .header-banner {
    height: 200px;
    background-position: center center;
  }

  .main-nav {
    position: fixed;
    top: 0;
    left: -260px;
    height: 100vh;
    width: 240px;
    background: #fff;
    box-shadow: 3px 0 10px rgba(0,0,0,0.25);
    transition: left 0.3s ease;
    z-index: 300;
    padding-top: 80px;
  }

  .main-nav.open {
    left: 0;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 20px;
    gap: 20px;
  }

  .main-nav a {
    font-size: 16px;
  }

  .hamburger {
    display: flex;
  }
}