/* 全站颜色唯一入口：浅色 / 暗黑；组件仅引用语义变量。 */
:root[data-theme="light"] {
  color-scheme: light;
  --color-bg: #f8f6ef;
  --color-text: #353b30;
  --color-muted: #676f60;
  --color-primary: #556448;
  --color-primary-hover: #36442d;
  --color-button: #556448;
  --color-button-text: #ffffff;
  --color-surface: #fffdf8;
  --color-soft: #eaeade;
  --color-banner: #edeee3;
  --color-border: #dce0d2;
  --color-accent: #d9e7b9;
  --color-accent-text: #35402c;
  --color-accent-hover: #cadca3;
  --color-active: #eef2e6;
  --color-progress: #748952;
  --color-glass: rgba(248, 246, 239, .82);
  --color-glass-border: rgba(255, 255, 255, .8);
  --color-shadow: rgba(42, 53, 31, .13);
  --color-highlight: rgba(255, 255, 255, .4);
  --color-focus: rgba(85, 100, 72, .25);
  --color-footer: #232b22;
  --color-footer-text: #f4f3e9;
  --color-footer-muted: #b7bfaf;
  --color-footer-surface: #374032;
  --color-footer-border: #ffffff25;
  --color-gradient-start: #d6e9cf;
  --color-gradient-mid: #f2f0ca;
  --color-gradient-end: #ebbd98;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #181d18;
  --color-text: #e6e9df;
  --color-muted: #b0b9a6;
  --color-primary: #b6ce93;
  --color-primary-hover: #d4e6b7;
  --color-button: #b6ce93;
  --color-button-text: #1d2816;
  --color-surface: #232b23;
  --color-soft: #2a3429;
  --color-banner: #242e24;
  --color-border: #44513e;
  --color-accent: #405735;
  --color-accent-text: #e3efce;
  --color-accent-hover: #506a41;
  --color-active: #34472c;
  --color-progress: #b6ce93;
  --color-glass: rgba(30, 39, 30, .86);
  --color-glass-border: rgba(211, 230, 194, .2);
  --color-shadow: rgba(0, 0, 0, .35);
  --color-highlight: rgba(211, 230, 194, .08);
  --color-focus: rgba(182, 206, 147, .3);
  --color-footer: #101610;
  --color-footer-text: #e8edde;
  --color-footer-muted: #b6c0aa;
  --color-footer-surface: #253321;
  --color-footer-border: #d9e7b925;
  --color-gradient-start: #b3cca7;
  --color-gradient-mid: #d9d6a3;
  --color-gradient-end: #c99f7b;
}

/* 将项目主题映射到 Pico 的原生组件。 */
:root[data-theme] {
  --pico-background-color: var(--color-bg);
  --pico-color: var(--color-text);
  --pico-muted-color: var(--color-muted);
  --pico-h1-color: var(--color-text);
  --pico-h2-color: var(--color-text);
  --pico-h3-color: var(--color-text);
  --pico-h4-color: var(--color-text);
  --pico-primary: var(--color-primary);
  --pico-primary-hover: var(--color-primary-hover);
  --pico-primary-background: var(--color-button);
  --pico-primary-border: var(--color-button);
  --pico-primary-inverse: var(--color-button-text);
  --pico-primary-hover-background: var(--color-primary-hover);
  --pico-primary-hover-border: var(--color-primary-hover);
  --pico-primary-focus: var(--color-focus);
  --pico-muted-border-color: var(--color-border);
  --pico-card-background-color: var(--color-surface);
  --pico-card-sectioning-background-color: var(--color-soft);
  --pico-form-element-background-color: var(--color-surface);
  --pico-form-element-color: var(--color-text);
  --pico-form-element-placeholder-color: var(--color-muted);
  --pico-form-element-border-color: var(--color-border);
  --pico-form-element-active-border-color: var(--color-primary);
  --pico-form-element-focus-color: var(--color-focus);
  --pico-border-radius: 1rem;
}