.background-color-setting { margin-top: 14px; width: 100%; }
.background-toggle { display: flex; align-items: center; justify-content: center; gap: 9px; width: 100%; min-height: 44px; }
.background-chip { width: 20px; height: 20px; border: 1px solid var(--warm-line-soft); border-radius: 50%; background: #fff; }
.background-palette { margin-top: 10px; padding: 12px; border: 2px solid var(--warm-line-soft); border-radius: 10px; background: var(--warm-panel); }
.background-palette[hidden] { display: none; }
.background-swatches { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.background-swatch { width: 100%; min-height: 36px; border: 2px solid var(--warm-line-soft); border-radius: 8px; cursor: pointer; }
.background-swatch[aria-pressed="true"] { outline: 3px solid var(--warm-accent); outline-offset: 1px; }
.background-custom { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 14px; color: var(--warm-text-soft); font-size: 0.85rem; }
.background-custom input { width: 56px; height: 36px; padding: 2px; border: 1px solid var(--warm-line-soft); border-radius: 6px; background: #fffaf3; cursor: pointer; }
.background-color-setting button:disabled, .background-color-setting input:disabled { opacity: 0.45; cursor: default; }
.background-color-setting :focus-visible { outline: 3px solid var(--warm-accent); outline-offset: 3px; }