/* leftbar-extras.css
 * 配套 leftbar-extras.js，把 Stellar 2.0 的两个功能移植到 1.44：
 * 1) 侧边栏收起：收起后 64px 窄栏，只剩头像 + 五个页面图标 + 搜索 + 展开按钮；
 * 2) 弹层搜索：搜索改成按钮（展开态保持原搜索栏样式），点击弹出居中大卡片搜索框。
 * 布局原理：1.44 侧边栏宽度 = 64px 固定 + var(--side-content-width)，
 * 收起时把 --side-content-width 归零即得 64px 窄栏。
 */

/* ========== 1. 搜索按钮：展开态是原搜索栏样式的横条 ========== */
.l_left .search-trigger {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  width: auto;
  height: 40px;
  /* 第六轮：上边距归零对齐线上（菜单与搜索框间距 0），下边距 32px +
     widget 自带 8px margin-top = 40px，对齐线上输入框底→便签顶的间距
     （第四轮把 #search-wrapper 搬进弹层后，原 32px padding-bottom 规则失效，
     间距塌成 8px） */
  margin: 0 var(--gap-base) 32px;
  padding: 0 16px;
  border: none;
  background: transparent;
  color: var(--text-p3);
  font-family: inherit;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
}
.l_left .search-trigger svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--text-p2);
}
.l_left .search-trigger:hover {
  color: var(--text-p1);
}
/* 底部细线：与主题 search-form 同源（ui-style:card 时用 --leftbar-search-line） */
.l_left .search-trigger::before {
  position: absolute;
  content: '';
  height: 1px;
  bottom: 0;
  left: 16px;
  right: 16px;
  border-radius: 8px;
  background: var(--leftbar-search-line, var(--bg-a100));
}
[data-theme="dark"] .l_left .search-trigger::before {
  background: var(--leftbar-search-line, var(--bg-a20));
}
/* 彩虹渐变条：hover/键盘聚焦时亮起，数值取自主题默认 style.gradient.searchbar */
.l_left .search-trigger::after {
  position: absolute;
  content: '';
  height: 2px;
  bottom: 0;
  left: 16px;
  right: 16px;
  border-radius: 8px;
  background: linear-gradient(to right, #04f3ff, #08ffc6, #ddf730, #ffbd19, #ff1fe0, #c418ff, #3b5bff, #04f3ff);
  background-size: 200%;
  animation: search-glow 20s linear infinite;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.l_left .search-trigger:hover::after,
.l_left .search-trigger:focus-visible::after {
  opacity: 1;
}

/* ========== 收起/展开按钮：展开态作为页脚社交图标行的最后一个方块 ========== */
.l_left .leftbar-collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  padding: 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-p3);
  cursor: pointer;
  transition: background 0.2s ease-out, color 0.2s ease-out;
}
.l_left .leftbar-collapse-btn svg {
  width: 20px;
  height: 20px;
}
.l_left .leftbar-collapse-btn:hover {
  background: var(--block);
  color: var(--text-p1);
}

@media screen and (min-width: 668px) {
  /* ========== 2. 收起态：64px 窄栏，贴左收起 ==========
   * 布局原理：把左列从 1fr 改成「窄栏 + 页边距」固定宽，窄栏 justify-self
   * 改 left 贴到视口左缘；中列吃下让出来的空间（上限 = 原正文宽 + 侧栏宽）；
   * 右列下限 = 展开态 1fr 的同款公式，保证右栏在任何页面都不被压缩。
   * 注意 --side-content-width 只能作用在 .l_left 上：它挂在 html 上会连带
   * 把右栏宽度变量一起归零（右栏宽度同源）。
   */
  html[data-leftbar-collapsed] .l_body {
    grid-template-columns: calc(var(--gap-base) * 4 + var(--gap-page)) minmax(200px, calc(var(--width-main) + var(--gap-base) * 4 + 224px)) minmax(calc((100% - var(--width-main) - var(--gap-page) * 2) / 2), 1fr);
  }
  html[data-leftbar-collapsed] .l_body .l_left {
    --side-content-width: 0px;
    justify-self: left;
    margin-left: var(--gap-base);
  }
  /* 标题隐藏，头像居中 */
  html[data-leftbar-collapsed] .l_left .header {
    margin: 16px 8px 0;
  }
  html[data-leftbar-collapsed] .l_left .logo-wrap {
    justify-content: center;
  }
  html[data-leftbar-collapsed] .l_left .logo-wrap a.title {
    display: none;
  }
  html[data-leftbar-collapsed] .l_left .logo-wrap a.avatar {
    margin-right: 0;
  }
  /* 菜单改竖排，单列方块（方块底色沿用 code-enhance 的黑白半透明规则） */
  html[data-leftbar-collapsed] .l_left .nav-area {
    margin: 8px 8px 0;
  }
  html[data-leftbar-collapsed] .l_left nav.menu .ui-collection {
    grid-template-columns: 1fr;
  }
  /* widgets 隐藏；社交行里的链接/主题切换按钮隐藏，但行本身保留——
     收起按钮挂在行内，行若整体 display:none 会把按钮连带藏掉 */
  html[data-leftbar-collapsed] .l_left .widgets,
  html[data-leftbar-collapsed] .l_left footer.footer .social-wrap > a,
  html[data-leftbar-collapsed] .l_left footer.footer .social-wrap > button.social {
    display: none;
  }
  html[data-leftbar-collapsed] .l_left footer.footer .social-wrap {
    margin: 0;
    padding: 0;
  }
  html[data-leftbar-collapsed] .l_left footer.footer {
    padding: 0;
    margin: 0;
  }
  /* 搜索按钮变图标方块，样式对齐菜单方块 */
  html[data-leftbar-collapsed] .l_left .search-trigger {
    justify-content: center;
    margin: 8px;
    padding: 0;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.5);
  }
  html[data-leftbar-collapsed][data-theme="dark"] .l_left .search-trigger {
    background: rgba(0, 0, 0, 0.5);
  }
  html[data-leftbar-collapsed] .l_left .search-trigger:hover {
    background: #fff;
  }
  html[data-leftbar-collapsed][data-theme="dark"] .l_left .search-trigger:hover {
    background: #000;
  }
  html[data-leftbar-collapsed] .l_left .search-trigger span {
    display: none;
  }
  html[data-leftbar-collapsed] .l_left .search-trigger svg {
    width: 28px;
    height: 28px;
    filter: grayscale(50%) brightness(0.8);
  }
  html[data-leftbar-collapsed] .l_left .search-trigger:hover svg {
    filter: unset;
  }
  html[data-leftbar-collapsed] .l_left .search-trigger::before,
  html[data-leftbar-collapsed] .l_left .search-trigger::after {
    display: none;
  }
  /* 展开按钮移到窄栏底部居中，同样块样式（footer 已 display 清空，绝对定位贴 .l_left） */
  html[data-leftbar-collapsed] .l_left .leftbar-collapse-btn {
    position: absolute;
    left: 8px;
    right: 8px;
    bottom: 12px;
    flex: none;
    width: auto;
    height: 40px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-p2);
  }
  html[data-leftbar-collapsed][data-theme="dark"] .l_left .leftbar-collapse-btn {
    background: rgba(0, 0, 0, 0.5);
  }
  html[data-leftbar-collapsed] .l_left .leftbar-collapse-btn:hover {
    background: #fff;
    color: var(--text-p1);
  }
  html[data-leftbar-collapsed][data-theme="dark"] .l_left .leftbar-collapse-btn:hover {
    background: #000;
  }
}

/* 收起后内容区放宽已并入上方 grid-template-columns 的中列上限，不再动 --width-main */

/* ========== 3. 弹层搜索 ========== */
.search-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 24px 24px;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  /* visibility 只在关闭时延迟 .2s（等淡出播完再隐藏）；打开时立即 visible，
     否则 Chromium 在 visibility 过渡中拒绝 focus 输入框 */
  transition: opacity 0.2s ease, visibility 0s linear 0.2s;
}
.search-modal.open {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.2s ease, visibility 0s linear 0s;
}
.search-modal-card {
  position: relative;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  width: 100%;
  max-width: 640px;
  height: min(64vh, 560px);
  min-height: 320px;
  padding: 16px;
  background: var(--card);
  border-radius: 24px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  transform: translateY(8px) scale(0.985);
  transition: transform 0.2s ease;
}
.search-modal.open .search-modal-card {
  transform: none;
}
/* 被搬进来的 #search-wrapper 撑满卡片；原 .leftbar-container > .search-wrapper
 * 的定位规则失效，这里重排：输入区在上，结果区弹性占满剩余高度 */
.search-modal-card #search-wrapper {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  min-height: 0;
  margin: 0;
  padding: 0;
}
.search-modal-card .search-form {
  position: static;
  height: 48px;
  padding: 0 44px 0 16px; /* 右侧留白给关闭按钮 */
}
.search-modal-card .search-input {
  font-size: 16px;
}
.search-modal-card #search-result {
  flex: 1;
  min-height: 0;
  max-height: none;
}
.search-modal-close {
  position: absolute;
  top: 24px;
  right: 20px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-p3);
  cursor: pointer;
  transition: background 0.2s ease-out, color 0.2s ease-out;
}
.search-modal-close svg {
  width: 18px;
  height: 18px;
}
.search-modal-close:hover {
  background: var(--block);
  color: var(--text-p1);
}

/* 移动端弹层：占高多一点、圆角收小 */
@media screen and (max-width: 667px) {
  .search-modal {
    padding: 8vh 16px 16px;
  }
  .search-modal-card {
    height: min(72vh, 560px);
    border-radius: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .l_body aside.l_left,
  .search-modal,
  .search-modal-card {
    transition: none;
  }
}