/* ============================================
   访客徽章（顶栏胶囊 + 悬停小卡）
   依赖 tokens.css；配色/字体全走变量。
   ============================================ */
:root {
  --color-online: #8ea36e;
  --color-pop: #faf7f2;
}

.visitor-widget {
  position: relative;
  display: inline-flex;
}

/* 加载中：先占位，避免数据到达时顶栏跳动 */
.visitor-widget.is-loading {
  visibility: hidden;
  min-width: 96px;
}

.visitor-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0.32em 1em 0.32em 0.5em;
  font-size: var(--text-meta);
  font-weight: 500;
  letter-spacing: 0.02em;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-pill);
  transition: background var(--duration-fast), color var(--duration-fast),
    border-color var(--duration-fast);
}

.visitor-pill b {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.visitor-pill-text {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  white-space: nowrap;
}

.visitor-widget.is-live .visitor-pill {
  background: var(--color-ink);
  color: var(--color-nav-fg);
  border-color: var(--color-ink);
}

/* ---------- 头像堆叠 ---------- */
.visitor-widget .av {
  display: block;
  flex: none;
}

.visitor-widget .av-wrap {
  position: relative;
  display: block;
  width: 22px;
  height: 22px;
}

.visitor-widget .stack {
  display: inline-flex;
  align-items: center;
}

.visitor-widget .stack .av-wrap {
  margin-left: -8px;
  border-radius: 50%;
  background: var(--color-surface-alt);
  box-shadow: 0 0 0 2px var(--color-surface-alt);
}

.visitor-widget .stack .av-wrap:first-child {
  margin-left: 0;
}

.visitor-widget.is-live .visitor-pill .stack .av-wrap {
  background: var(--color-ink);
  box-shadow: 0 0 0 2px var(--color-ink);
}

/* 在线者：绿圈 */
.visitor-widget .av-wrap.is-online::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  border: 2px solid var(--color-online);
}

.visitor-widget .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-online);
  position: relative;
  flex: none;
}

.visitor-widget .dot::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1.5px solid var(--color-online);
  animation: visitor-ping 1.7s ease-out infinite;
}

@keyframes visitor-ping {
  0% { transform: scale(0.6); opacity: 0.9; }
  100% { transform: scale(1.9); opacity: 0; }
}

/* ---------- 小卡 ---------- */
.visitor-pop {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  z-index: 30;
  width: min(320px, calc(100vw - 32px));
  background: var(--color-pop);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  display: grid;
  gap: 12px;
  box-shadow: 0 24px 48px -28px rgba(26, 26, 26, 0.45);
  text-align: left;
  font-size: var(--text-meta);
}

.visitor-pop::before {
  content: "";
  position: absolute;
  top: -6px;
  right: 28px;
  width: 10px;
  height: 10px;
  background: var(--color-pop);
  border-left: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
  rotate: 45deg;
}

.visitor-pop .pencil {
  font-family: var(--font-mono);
  font-size: var(--text-annotation);
  color: var(--color-faint);
  letter-spacing: 0.01em;
}

.visitor-pop-title {
  font-weight: 700;
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
}

.visitor-pop-title b {
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
}

.visitor-pop .avatars {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}

.visitor-pop .avatars .av-wrap {
  width: 26px;
  height: 26px;
}

.visitor-pop[hidden],
.visitor-pop-live[hidden] {
  display: none;
}

.visitor-pop-live {
  display: grid;
  gap: 6px;
  padding-top: 10px;
  border-top: 1px dashed var(--color-border);
}

.visitor-pop-live .stack .av-wrap {
  background: var(--color-pop);
  box-shadow: 0 0 0 2px var(--color-pop);
}

/* ---------- 小屏：只留头像和数字；小卡贴视口两侧 ---------- */
@media (max-width: 640px) {
  .visitor-pill {
    gap: 8px;
    padding-right: 0.8em;
  }

  .visitor-pill-text > span {
    display: none;
  }

  .visitor-widget.is-loading {
    min-width: 72px;
  }

  .visitor-pop {
    position: fixed;
    top: var(--visitor-pop-top, 76px);
    left: 16px;
    right: 16px;
    width: auto;
  }

  .visitor-pop::before {
    display: none;
  }

  /* 详情页面包屑本身就长，小屏不再挤徽章进去（首页保留） */
  body:has(#crumb-project) .visitor-widget {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .visitor-widget .dot::after {
    animation: none;
  }
}