/* 冷調霧面玻璃，只改表面 token，幾何沿用 base.css。 */
:root[data-era="f"] {
  --color-scheme: dark;
  --color-bg: #36576B;
  --color-paper: #3F677B;
  --color-text: #F3FAFC;
  --color-text-muted: #D2E1E7;
  --color-accent: #98EBF1;
  --color-button: #D1F4FA;
  --color-divider: #91BDD0;
  --color-heavy: #F9D3C2;
  --color-button-text: #244756;
  --color-accent-secondary: #A7C7C5;
  --color-focus: #F1CC84;
  --color-heavy-surface: #3F5362;
  --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(135deg, rgb(10 30 40 / 0.035), transparent 60%), radial-gradient(ellipse at top left, rgb(10 30 40 / 0.04), transparent 68%), repeating-linear-gradient(0deg, rgb(0 0 0 / 0.015) 0 1px, transparent 1px 4px);
  --surface-border-color: #91BDD0;
  --surface-border-style: solid;
  --surface-border-image: none;
  --button-background: #D1F4FA;
  --illustration-filter: saturate(0.78);
  --heavy-illustration-filter: saturate(0.30) contrast(0.92);
}