.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 24px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  gap: 16px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
}

.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

.mobile-menu-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 8px 14px;
  flex: 1;
  max-width: 380px;
  transition: all var(--transition-fast);
}

.header-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.search-icon {
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.search-input {
  border: none;
  background: transparent;
  padding: 0;
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  flex: 1;
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.search-kbd {
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-mono);
  background: var(--bg-hover);
  color: var(--text-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

.header-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-tertiary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-hover);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  transition: background var(--transition-fast);
}

.status-dot.saving {
  background: var(--warning);
  animation: pulse-glow 1s ease-in-out infinite;
}

.status-dot.error {
  background: var(--danger);
}

.header-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

.header-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

[data-theme="dark"] .theme-icon-sun { display: inline-block; color: #FBBF24; font-size: 16px; }
[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="light"] .theme-icon-sun { display: none; }
[data-theme="light"] .theme-icon-moon { display: inline-block; color: #6B7280; font-size: 16px; }

#themeHeaderBtn { font-size: 0; }

.notif-btn.has-notif::after {
  content: '';
  position: absolute;
  top: 8px;
  right: 8px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.header-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  margin-left: 4px;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.header-avatar:hover {
  transform: scale(1.05);
}