a[data-preview]:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
  border-radius: 2px;
}

.link-preview {
  --preview-bg: #fff;
  --preview-text: #181818;
  --preview-muted: #6a6a6a;
  --preview-line: #e8e8e8;
  --preview-soft: #f5f5f5;
  --contribution-0: #ebedf0;
  --contribution-1: #9be9a8;
  --contribution-2: #40c463;
  --contribution-3: #30a14e;
  --contribution-4: #216e39;
  position: fixed;
  z-index: 100;
  inset: auto;
  box-sizing: border-box;
  width: min(360px, calc(100vw - 24px));
  margin: 0;
  padding: 0;
  overflow: hidden;
  overflow-y: auto;
  border: 1px solid var(--preview-line);
  border-radius: 12px;
  background: var(--preview-bg);
  color: var(--preview-text);
  box-shadow: 0 14px 45px rgb(0 0 0 / 12%), 0 3px 10px rgb(0 0 0 / 5%);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 13px;
  line-height: 1.4;
  text-align: left;
  opacity: 0;
  transition: opacity 160ms ease;
}

.link-preview[hidden] { display: none; }
.link-preview.is-visible { opacity: 1; }
.link-preview[data-kind="github"] { width: min(420px, calc(100vw - 24px)); }

.link-preview .preview-link {
  display: block;
  background: var(--preview-bg);
  color: inherit;
  text-decoration: none;
}

.preview-outgoing {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

.preview-image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
  object-position: top;
  background: var(--preview-soft);
}

.preview-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border-top: 1px solid var(--preview-line);
}

.preview-footer-text { flex: 1; min-width: 0; }
.preview-title { display: block; font-size: 13px; font-weight: 600; }
.preview-domain {
  display: block;
  margin-top: 2px;
  overflow: hidden;
  color: var(--preview-muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.preview-arrow { color: var(--preview-muted); font-size: 18px; }

.preview-placeholder {
  display: grid;
  min-height: 180px;
  box-sizing: border-box;
  place-content: center;
  gap: 8px;
  padding: 24px;
  text-align: center;
  background: var(--preview-soft);
}
.preview-placeholder strong { font-size: 21px; font-weight: 600; }
.preview-placeholder span { color: var(--preview-muted); }
.preview-email-icon { font-size: 34px; line-height: 1; margin-bottom: 8px; }

.preview-github { padding: 20px 18px 16px; }
.preview-github-heading { display: flex; align-items: center; gap: 9px; font-size: 13px; font-weight: 600; }
.preview-github-heading svg { flex: 0 0 auto; }
.preview-contribution-summary { margin: 17px 0 12px; font-size: 12px; }
.preview-contribution-summary strong { font-size: 18px; font-weight: 600; }
.preview-contribution-summary span { color: var(--preview-muted); }
.preview-months, .preview-calendar {
  display: grid;
  grid-template-columns: repeat(var(--weeks, 53), minmax(0, 1fr));
  gap: 2px;
}
.preview-months { margin-bottom: 5px; color: var(--preview-muted); font-size: 9px; }
.preview-months span { overflow: visible; }
.preview-calendar { grid-template-rows: repeat(7, auto); grid-auto-flow: column; }
.preview-day { aspect-ratio: 1; min-width: 0; border-radius: 1px; background: var(--contribution-0); }
.preview-day[data-level="1"] { background: var(--contribution-1); }
.preview-day[data-level="2"] { background: var(--contribution-2); }
.preview-day[data-level="3"] { background: var(--contribution-3); }
.preview-day[data-level="4"] { background: var(--contribution-4); }
.preview-day.is-empty { visibility: hidden; }
.preview-calendar-meta { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 10px; color: var(--preview-muted); font-size: 10px; }
.preview-legend { display: flex; align-items: center; gap: 3px; }
.preview-legend .preview-day { width: 8px; height: 8px; }
.preview-legend span:first-child { margin-right: 3px; }
.preview-legend span:last-child { margin-left: 3px; }

html[data-theme="dark"] .link-preview {
  --preview-bg: #1b1b1b;
  --preview-text: #ededed;
  --preview-muted: #aaa;
  --preview-line: #333;
  --preview-soft: #242424;
  --contribution-0: #30343b;
  --contribution-1: #0e4429;
  --contribution-2: #006d32;
  --contribution-3: #26a641;
  --contribution-4: #39d353;
  box-shadow: 0 14px 45px rgb(0 0 0 / 35%), 0 3px 10px rgb(0 0 0 / 20%);
}

@media (prefers-reduced-motion: reduce) {
  .link-preview { transition: none; transform: none; }
}