/* 老照片報紙，只改表面 token，幾何沿用 base.css。 */
:root[data-era="a"] {
  --color-scheme: light;
  --color-bg: #EAD0B0;
  --color-paper: #F4E2C8;
  --color-text: #25231F;
  --color-text-muted: #60594E;
  --color-accent: #9A231E;
  --color-button: #9A231E;
  --color-divider: #776B58;
  --color-heavy: #7D3A2F;
  --color-button-text: #FFF3DF;
  --color-accent-secondary: #8C806B;
  --color-focus: #25231F;
  --color-heavy-surface: #F4E2C8;
  --font-heading: "Noto Serif TC", "Noto Serif CJK TC", "PingFang TC", "PMingLiU", serif;
  --font-body: "Noto Sans TC", "Noto Sans CJK TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --surface-background: linear-gradient(0deg, rgb(96 89 78 / 0.025), transparent 68%), radial-gradient(ellipse at top, rgb(255 243 223 / 0.20), transparent 70%), repeating-linear-gradient(0deg, rgb(37 35 31 / 0.025) 0 1px, transparent 1px 4px);
  --surface-border-color: #776B58;
  --surface-border-style: solid;
  --surface-border-image: none;
  --button-background: #9A231E;
  --illustration-filter: saturate(0.45) sepia(0.10);
  --heavy-illustration-filter: saturate(0.30) contrast(0.92);
}