.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #eef2f4;
  transition: box-shadow 0.3s;
}
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(15, 61, 92, 0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-img {
  width: 200px;
  height: 120px;
  object-fit: contain;
}

.logo-name {
  font-size: 1.05rem;
  color: var(--navy);
}
.logo-sub {
  font-size: 0.7rem;
  color: var(--text-soft);
  letter-spacing: 0.5px;
}
.main-nav {
  display: flex;
  gap: 32px;
  font-weight: 500;
}
.main-nav a {
  position: relative;
  color: var(--text);
  transition: color 0.25s;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--sky);
  transition: width 0.3s;
}
.main-nav a:hover {
  color: var(--blue);
}
.main-nav a:hover::after {
  width: 100%;
}
.btn-whatsapp-header {
  white-space: nowrap;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.4rem;
  color: var(--navy);
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px 24px;
    gap: 18px;
    transform: translateY(-120%);
    opacity: 0;
    transition:
      transform 0.4s ease,
      opacity 0.4s ease;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.06);
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }
  .btn-whatsapp-header {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
}
.logo-img.img-placeholder {
  min-height: 0;
  height: 52px;
  width: 52px;
  border-radius: 8px;
}
.logo-img.img-placeholder::after {
  font-size: 0.5rem;
  content: "LOGO";
}
@media (max-width: 480px) {
  .header-inner {
    padding: 10px 16px;
  }
  .logo-name {
    font-size: 0.92rem;
  }
}