/* ===============================
   Base Header
=============================== */
.site-header {
  width: 100%;
  background: #fff;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  z-index: 2000;
  transition: all 0.3s ease;
}

.header-container {
  max-width: 1200px;
  margin: auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo img {
  height: 40px;
}

/* Navigation */
.main-nav {
  display: flex;
  z-index: 1500;
}

.main-nav ul {
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
}

/* Dropdown Desktop */
.menu-item {
  position: relative;
}

.dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: #fff;
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.25s ease;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  z-index: 3000;
}

.dropdown li a {
  padding: 10px 16px;
  display: block;
  white-space: nowrap;
}

@media (min-width: 769px) {
  .has-dropdown:hover > .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.auth-buttons .btn {
  padding: 6px 14px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 14px;
}

.btn.login {
  color: #333;
}

.btn.register {
  background: #2563eb;
  color: #fff;
}

/* Mobile styles */
.menu-toggle {
  display: none;
  font-size: 28px;
  background: none;
  border: none;
  cursor: pointer;
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 4000;
}

.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 3000;
  transition: opacity 0.3s ease;
}

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

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 260px;
    background: #fff;
    padding-top: 80px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    box-shadow: -10px 0 20px rgba(0,0,0,0.1);
    z-index: 3500;
    display: block;
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .main-nav ul {
    flex-direction: column;
    gap: 20px;
    padding: 0 24px;
  }

  .dropdown {
    position: static;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    padding-right: 12px;
  }

  .menu-item.open > .dropdown {
    display: block;
  }

  /* Hide header actions on mobile */
  .header-actions {
    display: none;
  }
}