/* ============================================
 * 导航栏样式
 * ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height, 64px);
  background: rgba(26, 47, 29, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-brand {
  font-family: var(--font-serif, 'Noto Serif SC', serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* 桌面导航栏隐藏（所有导航移入汉堡菜单） */
.header-nav {
  display: none;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* 注：.auth-btn 样式由 globals.css 统一定义（避免与 globals.css 重复定义导致
   padding/font-weight 冲突），此处不再覆盖。 */

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 1px;
  transition: all 0.3s ease;
}

.hamburger.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
}
.hamburger.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端侧边导航 */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-nav-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  max-width: 85vw;
  height: 100%;
  background-color: var(--color-surface);
  background-image: none;
  z-index: 201;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg, -4px 0 24px rgba(0, 0, 0, 0.15));
}

.mobile-nav.active {
  transform: translateX(0);
}

/* 可滚动区域 */
.mobile-nav-scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px 0;
}

.mobile-nav-scroll a {
  display: flex;
  align-items: center;
  padding: 14px 24px;
  color: var(--color-text, #2d2d2d);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}

.mobile-nav-scroll a:hover,
.mobile-nav-scroll a.active {
  background: rgba(90, 125, 92, 0.12);
  color: var(--color-primary, #3a6b4a);
  border-left-color: var(--color-primary, #3a6b4a);
}

.theme-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-top: 1px solid var(--color-border-light, #e5e5e5);
  margin-top: auto;
  font-size: 0.9rem;
  color: var(--color-text, #2d2d2d);
}

.mobile-nav-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.06);
  color: #333;
  font-size: 1.2rem;
  cursor: pointer;
  margin: 12px 16px 4px auto;
}
.mobile-nav-close:hover {
  background: rgba(0,0,0,0.1);
}

@media (max-width: 900px) {
  .logo-text {
    display: none;
  }
}

@media (max-width: 768px) {
  .header {
    padding: 0 12px;
  }

  .header-brand {
    font-size: 1.1rem;
  }
}