.header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: var(--z-header);
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  margin: 0 auto;
  padding: 0 1.75rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand img {
  height: 28px;
  width: 28px;
  border-radius: 8px;
  object-fit: contain;
}

.brand-name {
  font-family: 'Lora', Georgia, serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.nav {
  display: none;
  gap: 4px;
  align-items: center;
  margin-left: auto;
}

.nav a {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text);
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  transition: background 0.2s ease, opacity 0.2s ease;
  opacity: 0.7;
  white-space: nowrap;
}

.nav a:hover {
  background: var(--nav-hover);
  opacity: 1;
}

.nav a.active {
  background: var(--nav-hover);
  opacity: 1;
  font-weight: 500;
}

.header-controls {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.burger-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.burger-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
  transform-origin: center;
}

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

.burger-btn.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

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