/* 新爱算 · 超级博客 —— 社区组件公共样式。主题可通过 --xb-accent、--xb-text、--xb-bg、--xb-border 定制；深色模式为 [data-theme=dark]。 */
.xb-root {
  --xbc-accent: var(--xb-accent, #19AB4A);
  --xbc-text: var(--xb-text, #1f2328);
  --xbc-bg: var(--xb-bg, #ffffff);
  --xbc-border: var(--xb-border, #e3e6ea);
  /* 次要文字：在页面底色与 --xbc-soft 浅底上都满足 WCAG AA 的 4.5:1（小号文字） */
  --xbc-muted: color-mix(in srgb, var(--xbc-text) 70%, var(--xbc-bg));
  --xbc-soft: color-mix(in srgb, var(--xbc-text) 5%, var(--xbc-bg));
  --xbc-hover: color-mix(in srgb, var(--xbc-text) 9%, var(--xbc-bg));
  --xbc-accent-soft: color-mix(in srgb, var(--xbc-accent) 12%, var(--xbc-bg));
  --xbc-on-accent: #111111;
  --xbc-danger: #d93025;
  --xbc-warning: #b45309;
  --xbc-radius: 8px;
  --xbc-shadow: 0 8px 28px rgba(0, 0, 0, .14);
  color: var(--xbc-text);
  font-size: 15px;
  line-height: 1.65;
  box-sizing: border-box;
}
[data-theme=dark] .xb-root, .xb-root[data-theme=dark] {
  --xbc-text: var(--xb-text, #e6edf3);
  --xbc-bg: var(--xb-bg, #0d1117);
  --xbc-border: var(--xb-border, #30363d);
  --xbc-danger: #ff7b72;
  --xbc-warning: #e3b341;
  --xbc-shadow: 0 8px 28px rgba(0, 0, 0, .5);
}
.xb-root *, .xb-root *::before, .xb-root *::after { box-sizing: inherit; }
.xb-root [hidden] { display: none !important; }

.xb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 36px; padding: 6px 14px; border: 1px solid var(--xbc-border); border-radius: var(--xbc-radius);
  background: var(--xbc-bg); color: var(--xbc-text); font: inherit; font-size: 14px; cursor: pointer; text-decoration: none;
  transition: background-color .15s, border-color .15s;
}
.xb-btn:hover:not(:disabled) { background: var(--xbc-hover); }
.xb-btn:disabled { opacity: .55; cursor: not-allowed; }
.xb-btn-primary { background: var(--xbc-accent); border-color: var(--xbc-accent); color: var(--xbc-on-accent); font-weight: 600; }
.xb-btn-primary:hover:not(:disabled) { background: color-mix(in srgb, var(--xbc-accent) 88%, #000); }
.xb-btn-danger { color: var(--xbc-danger); border-color: color-mix(in srgb, var(--xbc-danger) 45%, var(--xbc-border)); }
.xb-btn-danger:hover:not(:disabled) { background: color-mix(in srgb, var(--xbc-danger) 10%, var(--xbc-bg)); }
.xb-btn-link { border-color: transparent; background: transparent; color: var(--xbc-muted); padding: 4px 8px; min-height: 32px; }
.xb-btn-link:hover:not(:disabled) { color: var(--xbc-text); background: var(--xbc-hover); }
.xb-btn-block { width: 100%; }
.xb-icon-btn {
  display: inline-flex; align-items: center; justify-content: center; min-width: 36px; min-height: 36px; padding: 0 6px;
  border: 0; border-radius: var(--xbc-radius); background: transparent; color: var(--xbc-muted); font: inherit; font-size: 18px; cursor: pointer;
}
.xb-icon-btn:hover { background: var(--xbc-hover); color: var(--xbc-text); }
.xb-root :focus-visible { outline: 2px solid var(--xbc-accent); outline-offset: 2px; }

.xb-input, .xb-textarea, .xb-select {
  width: 100%; min-height: 38px; padding: 7px 11px; border: 1px solid var(--xbc-border); border-radius: var(--xbc-radius);
  background: var(--xbc-bg); color: var(--xbc-text); font: inherit; font-size: 15px;
}
.xb-input:focus, .xb-textarea:focus, .xb-select:focus { outline: none; border-color: var(--xbc-accent); box-shadow: 0 0 0 3px var(--xbc-accent-soft); }
.xb-textarea { min-height: 96px; resize: vertical; line-height: 1.6; }
.xb-field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; }
.xb-field > span, .xb-label { font-size: 13px; color: var(--xbc-muted); }
.xb-check { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--xbc-muted); cursor: pointer; min-height: 32px; }
.xb-check input { width: 16px; height: 16px; accent-color: var(--xbc-accent); }
.xb-hint { font-size: 13px; color: var(--xbc-muted); }
.xb-error-text { font-size: 13px; color: var(--xbc-danger); }
.xb-badge { display: inline-block; padding: 0 7px; border-radius: 10px; font-size: 12px; line-height: 20px; background: var(--xbc-soft); color: var(--xbc-muted); border: 1px solid var(--xbc-border); }
.xb-badge-accent { background: var(--xbc-accent); border-color: var(--xbc-accent); color: var(--xbc-on-accent); }
.xb-badge-warn { color: var(--xbc-warning); border-color: color-mix(in srgb, var(--xbc-warning) 40%, var(--xbc-border)); }
.xb-avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; background: var(--xbc-soft); flex: none; }
.xb-sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* 对话框与提示 */
.xb-mask { position: fixed; inset: 0; z-index: 2147483000; display: flex; align-items: center; justify-content: center; padding: 16px; background: rgba(0, 0, 0, .45); }
.xb-dialog { width: 100%; max-width: 440px; max-height: calc(100vh - 32px); overflow: auto; background: var(--xbc-bg); color: var(--xbc-text); border-radius: 12px; box-shadow: var(--xbc-shadow); border: 1px solid var(--xbc-border); }
.xb-dialog-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px 6px 20px; }
.xb-dialog-head h3 { margin: 0; font-size: 17px; }
.xb-dialog-body { padding: 6px 20px 12px; }
.xb-dialog-body p { margin: 0 0 8px; }
.xb-dialog-actions { display: flex; justify-content: flex-end; gap: 8px; padding: 8px 20px 18px; }
.xb-toasts { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 2147483001; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.xb-toast { padding: 9px 16px; border-radius: var(--xbc-radius); background: #1f2328; color: #fff; font-size: 14px; box-shadow: var(--xbc-shadow); max-width: min(92vw, 520px); transition: opacity .3s; }
.xb-toast-error { background: #a1261d; }
.xb-toast-success { background: #111111; border-left: 4px solid var(--xbc-accent); }
.xb-toast.xb-out { opacity: 0; }

/* 表情选择器 */
.xb-picker {
  position: absolute; z-index: 2147482000; width: 360px; height: 420px; display: flex; flex-direction: column;
  background: var(--xbc-bg); border: 1px solid var(--xbc-border); border-radius: 12px; box-shadow: var(--xbc-shadow); overflow: hidden;
}
.xb-picker-sheet { position: fixed; left: 0; right: 0; bottom: 0; top: auto !important; width: 100%; height: min(62vh, 460px); border-radius: 14px 14px 0 0; }
.xb-picker-loading { margin: auto; color: var(--xbc-muted); font-size: 14px; padding: 16px; text-align: center; }
.xb-picker-head { display: flex; gap: 4px; padding: 8px 8px 4px; align-items: center; }
.xb-picker-search { min-height: 34px; }
.xb-picker-tabs { display: flex; gap: 2px; padding: 0 6px 4px; overflow-x: auto; border-bottom: 1px solid var(--xbc-border); scrollbar-width: thin; }
.xb-picker-tab { flex: none; width: 34px; height: 34px; border: 0; border-radius: 6px; background: transparent; font-size: 18px; cursor: pointer; color: var(--xbc-muted); display: inline-flex; align-items: center; justify-content: center; }
.xb-picker-tab:hover { background: var(--xbc-hover); }
.xb-picker-tab img { width: 22px; height: 22px; object-fit: contain; }
.xb-picker-grid { flex: 1; overflow-y: auto; padding: 4px 8px 8px; overscroll-behavior: contain; }
.xb-picker-title { position: sticky; top: -4px; z-index: 1; padding: 6px 2px 4px; font-size: 12px; color: var(--xbc-muted); background: var(--xbc-bg); }
.xb-picker-cells { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 2px; }
.xb-picker-empty { padding: 6px 2px 10px; color: var(--xbc-muted); font-size: 13px; }
.xb-emoji-cell { width: 38px; height: 38px; border: 0; border-radius: 6px; background: transparent; font-size: 24px; line-height: 1; cursor: pointer; padding: 0; display: inline-flex; align-items: center; justify-content: center; font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif; }
.xb-emoji-cell:hover, .xb-emoji-cell:focus-visible { background: var(--xbc-hover); }
.xb-emoji-img img { width: 30px; height: 30px; object-fit: contain; }
.xb-picker-foot { padding: 5px 10px; font-size: 12px; color: var(--xbc-muted); border-top: 1px solid var(--xbc-border); }
.xb-gif-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 6px; margin: 8px 0; }
.xb-gif-cell { border: 0; padding: 0; border-radius: 6px; overflow: hidden; cursor: pointer; background: var(--xbc-soft); aspect-ratio: 4 / 3; }
.xb-gif-cell img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* 自动补全 */
.xb-complete { position: absolute; z-index: 2147482500; min-width: 200px; max-width: 320px; margin: 0; padding: 4px; list-style: none; background: var(--xbc-bg); border: 1px solid var(--xbc-border); border-radius: var(--xbc-radius); box-shadow: var(--xbc-shadow); }
.xb-complete li { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 6px; cursor: pointer; font-size: 14px; }
.xb-complete li.xb-active { background: var(--xbc-accent-soft); }
.xb-complete-img { width: 22px; height: 22px; object-fit: contain; }
.xb-complete-emoji { font-size: 20px; width: 22px; text-align: center; }

/* 内容中的表情、GIF、提及 */
.xb-emoji { display: inline-block; height: 1.6em; width: auto; max-width: 128px; vertical-align: -0.4em; margin: 0 1px; }
img.xb-emoji[src$=".gif"], picture img.xb-emoji { height: 2.4em; }
.xb-gif { display: block; max-width: 100%; height: auto; border-radius: 6px; margin: 6px 0; }
.xb-mention { color: var(--xbc-accent); font-weight: 600; }
[data-theme=dark] .xb-mention { color: color-mix(in srgb, var(--xbc-accent) 80%, #fff); }

@media (max-width: 639px) {
  .xb-btn, .xb-icon-btn { min-height: 44px; min-width: 44px; }
  .xb-input, .xb-select { min-height: 44px; font-size: 16px; }
  .xb-textarea { font-size: 16px; }
  .xb-check { min-height: 44px; }
  .xb-emoji-cell { width: 44px; height: 44px; }
  .xb-picker-tab { width: 44px; height: 44px; }
}
@media (prefers-reduced-motion: reduce) {
  .xb-root *, .xb-toast { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}