/* SNS共有のサイズ選択ダイアログ */
.share-dialog {
  width: min(560px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  padding: 22px 20px 18px;
  border: 1px solid var(--color-panel-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  color: var(--color-text);
}

.share-dialog::backdrop {
  background: rgba(2, 4, 10, 0.72);
}

.share-dialog h2 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 1.2rem;
}

.share-sizes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
  margin: 14px 0 10px;
}

.share-size {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 8px 12px;
  border: 1px solid var(--color-panel-border);
  border-radius: var(--radius-control);
  background: var(--color-panel-raised);
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.12s;
}

.share-size:hover,
.share-size:focus-visible {
  border-color: var(--color-accent);
}

.share-size:active {
  transform: scale(0.98);
}

/* 縦長も横長も同じ大きさの枠に収め、並びが揃って見えるようにする */
.share-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 140px;
}

.share-thumb canvas {
  max-width: 100%;
  max-height: 100%;
  border-radius: 3px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.share-size-label {
  font-weight: 700;
}

.share-size-note {
  color: var(--color-text-muted);
  font-size: 0.78rem;
  line-height: 1.5;
  text-align: center;
}

.share-close {
  display: block;
  margin: 8px auto 0;
}