/* 移动端导航：各页原先把 .nav-links 直接藏掉，这里统一接管 */

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: 4px;
  padding: 0;
  border: 1px solid rgba(42, 36, 56, 0.12);
  border-radius: 12px;
  background: rgba(255, 250, 243, 0.95);
  color: #2a2438;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex: none;
  position: relative;
  z-index: 70;
}

.nav-toggle-bars {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  position: relative;
  transition: background 0.2s;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: '';
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s, top 0.2s;
}

.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.site-nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(42, 36, 56, 0.32);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.site-nav-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.site-nav-drawer {
  display: none;
  position: fixed;
  left: 12px;
  right: 12px;
  top: 12px;
  z-index: 210;
  padding: 18px 16px 20px;
  background: rgba(255, 250, 243, 0.98);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(42, 36, 56, 0.1);
  border-radius: 20px;
  box-shadow: 0 18px 40px rgba(74, 55, 100, 0.16);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  max-height: calc(100vh - 24px);
  overflow-y: auto;
}

.site-nav-drawer.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.site-nav-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(42, 36, 56, 0.08);
}

.site-nav-drawer-title {
  font-size: 15px;
  color: #6f5a9a;
  font-weight: 600;
}

.site-nav-drawer-close {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: #7a738c;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

.site-nav-drawer-close:hover {
  background: rgba(143, 123, 184, 0.1);
  color: #2a2438;
}

.site-nav-drawer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-nav-drawer a {
  display: block;
  padding: 14px 12px;
  border-radius: 12px;
  text-decoration: none;
  color: #2a2438;
  font-size: 16px;
  min-height: 44px;
  box-sizing: border-box;
}

.site-nav-drawer a:hover,
.site-nav-drawer a:focus-visible {
  background: rgba(143, 123, 184, 0.12);
  outline: none;
}

.site-nav-drawer a.active {
  color: #6f5a9a;
  font-weight: 600;
  background: rgba(143, 123, 184, 0.1);
}

/* 统一断点：各页自己的隐藏规则不一致，这里强制接管 */
@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  nav .nav-links {
    display: none !important;
  }

  .site-nav-drawer,
  .site-nav-backdrop {
    display: block;
  }

  nav {
    z-index: 120 !important;
  }

  .nav-container {
    gap: 8px;
  }

  #navAuthSection {
    margin-left: auto;
    gap: 6px !important;
  }

  /* 登录区变紧凑，别和汉堡抢位置 */
  #navAuthSection .nav-btn-login,
  #navAuthSection .nav-btn-logout,
  #navAuthSection .nav-btn-write {
    padding: 8px 12px !important;
    font-size: 13px !important;
  }

  /* 窄屏只留一个入口，注册在登录弹窗里能进 */
  #navAuthSection .nav-btn-register {
    display: none !important;
  }

  #navAuthSection .nav-user {
    max-width: 42vw;
  }

  #navAuthSection .nav-user-name,
  #navAuthSection .user-nickname {
    max-width: 5.5em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}