/* ============================================================
   navbar.css —— 积木块：顶部导航栏
   作用域前缀 .navbar，不污染其他块；颜色全部取自 base.css 变量
   ============================================================ */

.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  height: var(--navbar-h);
  background: var(--c-ink);
  box-shadow: 0 1px 0 var(--c-ink-line);
}

.navbar__inner {
  width: 100%;
  max-width: var(--layout-w);
  height: 100%;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 22px;
}

/* —— 品牌区 —— */
.navbar__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.navbar__logo {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #24c8f5 0%, #1a8df0 100%);
  box-shadow: 0 3px 10px rgba(26, 141, 240, 0.4);
  user-select: none;
}

.navbar__title {
  font-size: 19px;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Logo 换成自定义图片时（js/theme.js 会加 .is-image） */
.navbar__logo.is-image {
  background-size: cover;
  background-position: center;
  font-size: 0;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.25);
}

.navbar__switch {
  display: flex;
  align-items: center;
  gap: 5px;
  padding-left: 14px;
  margin-left: 6px;
  border-left: 1px solid var(--c-ink-line);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.62);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.18s var(--ease);
}

.navbar__switch:hover {
  color: #fff;
}

.navbar__switch svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
  opacity: 0.8;
}

/* —— 菜单 —— */
.navbar__menu {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.navbar__link {
  position: relative;
  padding: 9px 17px;
  border-radius: var(--radius-s);
  font-size: 15px;
  color: rgba(255, 255, 255, 0.66);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
  white-space: nowrap;
}

.navbar__link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.navbar__link.is-active {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  font-weight: 500;
}

/* —— 右侧：搜索 + 头像 —— */
.navbar__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar__search {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 264px;
  height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid transparent;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.navbar__search:focus-within {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(20, 177, 239, 0.6);
}

.navbar__search svg {
  width: 16px;
  height: 16px;
  flex: none;
  fill: rgba(255, 255, 255, 0.5);
}

.navbar__search input {
  width: 100%;
  border: 0;
  background: transparent;
  outline: none;
  font-size: 14px;
  color: #fff;
}

.navbar__search input::placeholder {
  color: rgba(255, 255, 255, 0.38);
}

/* 搜索框内清空按钮（有内容才出现） */
.navbar__searchclear {
  flex: none;
  width: 20px;
  height: 20px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.16);
  transition: background-color 0.16s var(--ease);
}

.navbar__searchclear[hidden] {
  display: none;
}

.navbar__searchclear:hover {
  background: rgba(255, 255, 255, 0.3);
}

.navbar__searchclear svg {
  width: 11px;
  height: 11px;
  fill: #fff;
}

/* 隐藏 type=search 自带的清除叉，避免出现两个 */
.navbar__search input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}

.navbar__avatar {
  width: 40px;
  height: 40px;
  flex: none;
  border: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  background: linear-gradient(135deg, #4a5468 0%, #2c3242 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14);
  transition: transform 0.18s var(--ease);
}

.navbar__avatar:hover {
  transform: scale(1.06);
}

.navbar__avatar svg {
  width: 21px;
  height: 21px;
  fill: rgba(255, 255, 255, 0.72);
}

/* —— 移动端折叠按钮（窄屏才出现） —— */
.navbar__toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: var(--radius-s);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  padding: 0;
  place-items: center;
}

.navbar__toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: #fff;
  border-radius: 2px;
  box-shadow: 0 -5px 0 #fff, 0 5px 0 #fff;
}

@media (max-width: 900px) {
  .navbar__search {
    width: 150px;
  }

  .navbar__switch {
    display: none;
  }
}

/* —— 带下拉菜单的菜单项 —— */
.navbar__menu-item {
  position: relative;
  display: flex;
  align-items: center;
}

.navbar__link--btn {
  border: 0;
  background: transparent;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  font-family: inherit;
  line-height: inherit;
}

.navbar__link--btn svg {
  width: 12px;
  height: 12px;
  transition: transform 0.2s var(--ease);
  opacity: 0.75;
}

.navbar__menu-item.is-open .navbar__link--btn {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.navbar__menu-item.is-open .navbar__link--btn svg {
  transform: rotate(180deg);
}

/* 下拉面板外壳（内容由管理积木块塞进来）
   尺寸按「大一号」定：540px 宽、16px 内边距，行高与字号都放宽 */
.navbar__dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  width: 540px;
  padding: 16px 18px 18px;
  border-radius: 14px;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  box-shadow: 0 20px 52px rgba(15, 20, 30, 0.2);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease), visibility 0.18s var(--ease);
  z-index: 60;
  text-align: left;
}

/* 靠右的菜单项（页面设置）：面板右对齐，避免顶出屏幕 */
.navbar__dropdown--right {
  left: auto;
  right: -10px;
  transform: translateY(-8px);
}

/* 靠右面板要在通用展开规则之后再声明，否则会被 translateX(-50%) 顶回去 */
.navbar__dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  width: 12px;
  height: 12px;
  transform: translateX(-50%) rotate(45deg);
  background: var(--c-card);
  border-left: 1px solid var(--c-line);
  border-top: 1px solid var(--c-line);
  border-radius: 2px;
}

.navbar__menu-item.is-open .navbar__dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.navbar__menu-item.is-open .navbar__dropdown--right {
  transform: translateY(0);
}

.navbar__dropdown--right::before {
  left: auto;
  right: 30px;
  transform: rotate(45deg);
}

@media (max-width: 720px) {
  .navbar__menu-item {
    display: block;
  }

  .navbar__dropdown {
    position: static;
    width: auto;
    transform: none;
    box-shadow: none;
    border: 0;
    border-radius: 0;
    padding: 4px 0 10px;
    background: transparent;
  }

  .navbar__dropdown::before {
    display: none;
  }

  .navbar__menu-item.is-open .navbar__dropdown {
    transform: none;
  }

  .navbar__toggle {
    display: grid;
  }

  .navbar__search {
    display: none;
  }

  /* 窄屏：菜单变成下拉面板 */
  .navbar__menu {
    position: absolute;
    top: var(--navbar-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 8px;
    background: var(--c-ink);
    border-top: 1px solid var(--c-ink-line);
    box-shadow: var(--shadow-2);
    display: none;
  }

  .navbar__menu.is-open {
    display: flex;
  }

  .navbar__link {
    padding: 11px 12px;
  }
}