/* ============================================================
   common.css - 全局共享样式（GitHub 灰白风格 + 深浅色模式）
   各页面专属样式请见 home.css / repo.css / docs.css / friend.css
   ============================================================ */

/* ---------- CSS 变量：浅色（默认） ---------- */
:root {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --border: #d0d7de;
  --text: #24292f;
  --text-muted: #57606a;
  --link: #0969da;
  --link-hover: #218bff;
  --sidebar-bg: #f6f8fa;
  --code-bg: #eff2f5;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --nav-bg: rgba(255, 255, 255, 0.85);
  --active-bg: #ddf4ff;
  --active-border: #0969da;
}

/* ---------- 深色模式 ---------- */
[data-theme="dark"] {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #c9d1d9;
  --text-muted: #8b949e;
  --link: #58a6ff;
  --link-hover: #79c0ff;
  --sidebar-bg: #161b22;
  --code-bg: #1f2428;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
  --nav-bg: rgba(22, 27, 34, 0.85);
  --active-bg: #1f6feb33;
  --active-border: #58a6ff;
}

/* ---------- 基础重置 ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s ease, color 0.2s ease;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); }

img { max-width: 100%; display: block; }

/* ---------- 顶部导航栏 ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 56px;
  padding: 0 24px;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-nav .nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  object-fit: cover;
}

.site-nav .nav-id {
  font-weight: 600;
  color: var(--text);
  font-size: 15px;
}
.site-nav .nav-id:hover { color: var(--link); }

.site-nav .nav-items {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 12px;
}

.site-nav .nav-item {
  position: relative;
  padding: 8px 14px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}
.site-nav .nav-item::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--active-border);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}
.site-nav .nav-item:hover { color: var(--text); }
.site-nav .nav-item:hover::after { transform: scaleX(1); }
.site-nav .nav-item.active {
  color: var(--text);
  font-weight: 700;
}
.site-nav .nav-item.active::after { transform: scaleX(1); }

.site-nav .nav-spacer { flex: 1; }

.site-nav .nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-nav .github-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.site-nav .github-link:hover {
  border-color: var(--link);
  color: var(--link);
  transform: translateY(-1px);
}
.site-nav .github-link svg { width: 16px; height: 16px; }

/* 主题切换按钮 */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.theme-toggle:hover { border-color: var(--link); color: var(--link); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: inline; }

/* 三点更多菜单：仅移动端使用，桌面端隐藏 */
.site-nav .nav-more,
.site-nav .nav-more-panel { display: none; }

/* ---------- 主容器 ---------- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}
.container.wide { max-width: 1280px; }

/* ---------- 大卡片面板（包装区块） ---------- */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}
.panel > .section-title {
  margin-bottom: 20px;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--link);
}

/* ---------- 卡片网格（项目 / Wiki / 好友共用） ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.project-grid-2 { grid-template-columns: repeat(2, 1fr); }
.project-grid-3 { grid-template-columns: repeat(3, 1fr); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.btn:hover {
  color: var(--link);
  border-color: var(--link);
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--link);
  color: #fff;
  border-color: var(--link);
}
.btn-primary:hover {
  background: var(--link-hover);
  border-color: var(--link-hover);
  color: #fff;
}
.btn[disabled], .btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---------- 区块标题 ---------- */
.section-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.section-title .more-link {
  font-size: 14px;
  font-weight: 500;
}

/* ---------- 页脚 ---------- */
.site-footer {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
  margin-top: 48px;
}

/* ---------- 加载/错误状态 ---------- */
.status-box {
  padding: 14px 18px;
  border-radius: 6px;
  background: var(--code-bg);
  color: var(--text-muted);
  font-size: 14px;
  border: 1px solid var(--border);
}

/* ---------- 公告条 ---------- */
.notice-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  font-size: 14px;
  line-height: 1.5;
}
.notice-text {
  flex: 1;
  min-width: 0;
}
/* 黄色警示样式 */
.notice-bar-warn {
  color: #7a5b00;
  background: #fff8db;
  border-bottom: 1px solid #f0d48a;
}
[data-theme="dark"] .notice-bar-warn {
  color: #ffe08a;
  background: #3b3200;
  border-bottom: 1px solid #55471c;
}
/* 红色 X 关闭按钮 */
.notice-close {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: #d33;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease;
}
.notice-close:hover { background: rgba(221, 51, 51, 0.12); }

/* ---------- 通用搜索框 ---------- */
.search-box {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 220px;
  max-width: 40vw;
}
.search-box .search-icon {
  position: absolute;
  left: 10px;
  display: inline-flex;
  color: var(--text-muted);
  pointer-events: none;
}
.search-box .search-icon svg { width: 14px; height: 14px; display: block; }
.search-box .search-input {
  width: 100%;
  padding: 6px 30px 6px 32px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.search-box .search-input::placeholder { color: var(--text-muted); }
.search-box .search-input:focus {
  border-color: var(--link);
  box-shadow: 0 0 0 3px var(--active-bg);
}
.search-box .search-clear {
  position: absolute;
  right: 6px;
  display: none;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.search-box .search-clear svg { width: 12px; height: 12px; display: block; }
.search-box .search-clear:hover { background: var(--active-bg); color: var(--text); }
.search-box.has-value .search-clear { display: inline-flex; }

/* 区块标题左侧容器：标题 + 搜索框 紧挨排列（间距约 1.5 汉字） */
.section-title .title-left {
  display: flex;
  align-items: center;
  gap: 1.5em;
}

/* Wiki 首页标题行：h1 + 搜索框 紧挨靠左（间距约 1.5 汉字） */
.docs-head-row {
  display: flex;
  align-items: center;
  gap: 1.5em;
  font-size: 26px; /* em 基准对齐 h1 字号，使 1.5em ≈ 1.5 个汉字 */
  margin-bottom: 16px;
}
.docs-head-row h1 { margin: 0; }

/* ---------- 响应式（导航栏 + 卡片网格） ---------- */
@media (max-width: 900px) {
  .site-nav { padding: 0 12px; gap: 8px; }
  .site-nav .nav-id { display: none; }
  .site-nav .gitee-link { display: none; }
  .project-grid { grid-template-columns: 1fr; }
  .project-grid-2, .project-grid-3 { grid-template-columns: 1fr; }
  .search-box { width: 150px; max-width: 50vw; }
  .docs-head-row { flex-wrap: wrap; }

  /* 三点更多菜单：移动端折叠 Wiki / 好友等 more 项，点击三点按钮在下方展开 */
  .site-nav .nav-item[data-more="true"] { display: none; }
  .site-nav .nav-more {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 10px;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    margin-left: 4px;
    transition: color 0.2s ease, background 0.2s ease;
  }
  .site-nav .nav-more:hover { color: var(--text); background: var(--active-bg); }
  .site-nav .nav-more-panel {
    display: block;
    position: absolute;
    top: 100%;
    margin-top: 4px;
    min-width: 140px;
    padding: 6px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    z-index: 101;
    transform: translateX(-50%) scaleY(0);
    transform-origin: top center;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.18s ease, opacity 0.18s ease;
  }
  .site-nav .nav-more-panel.open {
    transform: translateX(-50%) scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }
  .site-nav .nav-more-link {
    display: block;
    padding: 8px 12px;
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
  }
  .site-nav .nav-more-link:hover { background: var(--active-bg); color: var(--text); }
  .site-nav .nav-more-link.active { color: var(--text); font-weight: 700; background: var(--active-bg); }
}