/* Shared workbench palettes; UI only. Printed worksheets keep their own black/white styles. */
:root{
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",system-ui,sans-serif;
      color-scheme:light;
      --bg:#f5f5f1;
      --surface:#ffffff;
      --surface-2:#f8f8f5;
      --surface-3:#eaf3ee;
      --text:#1c2722;
      --muted:#758179;
      --border:#dfe5e0;
      --primary:#2f7159;
      --primary-text:#ffffff;
      --success:#2f7159;
      --warning:#a66b28;
      --danger:#b34d4d;
      --shadow:0 16px 44px rgba(31,57,46,.11);
      --shadow-soft:0 5px 18px rgba(40,52,46,.06);
      --theme-deep:#183128;
      --theme-deep-border:#29483d;
      --theme-mid:#29483d;
      --theme-accent:#397660;
      --hero-a:#fffdf8;
      --hero-b:#faf7ed;
      --hero-c:#edf5f0;
      --stage-excellent-text:#365f77;
      --stage-excellent-border:#bfd4df;
      --stage-excellent-bg:#edf5f8;
      --stage-good-text:#486f61;
      --stage-good-border:#c9ddd4;
      --stage-good-bg:#edf6f1;
      --stage-pass-text:#557060;
      --stage-pass-border:#d4dfd8;
      --stage-pass-bg:#f2f6f3;
      --stage-fail-text:#a4554d;
      --stage-fail-border:#ead0cc;
      --stage-fail-bg:#fbefed;
      --stage-follow-text:#926611;
      --stage-follow-border:#ead6a5;
      --stage-follow-bg:#fff7df;
    }
html[data-theme="ocean"] { --bg:#f2f6f7;--surface-2:#f6f9fa;--surface-3:#e5f0f3;--text:#1d2a2f;--muted:#72838a;--border:#d9e3e6;--primary:#39758a;--success:#39758a;--warning:#a26c30;--theme-deep:#19343d;--theme-deep-border:#2c515d;--theme-mid:#294d58;--theme-accent:#3b788b;--hero-a:#fbfdfe;--hero-b:#f2f7f8;--hero-c:#e5f1f4;--stage-excellent-text:#685f91;--stage-excellent-border:#d6d0e7;--stage-excellent-bg:#f1eef9;--stage-good-text:#397360;--stage-good-border:#c8ddd4;--stage-good-bg:#edf7f2;--stage-pass-text:#52717b;--stage-pass-border:#d1dfe3;--stage-pass-bg:#eef4f6;--stage-fail-text:#a45750;--stage-fail-border:#ead0cc;--stage-fail-bg:#fbefed; }
html[data-theme="rose"] { --bg:#faf5f3;--surface-2:#fcf8f6;--surface-3:#f6e9e5;--text:#302321;--muted:#88746f;--border:#eadeda;--primary:#a05f58;--success:#7a8061;--warning:#a87735;--theme-deep:#3f2928;--theme-deep-border:#65433f;--theme-mid:#593b38;--theme-accent:#a35f57;--hero-a:#fffdfb;--hero-b:#fbf2ed;--hero-c:#f5e6e2;--stage-excellent-text:#496b85;--stage-excellent-border:#c9d9e3;--stage-excellent-bg:#edf4f8;--stage-good-text:#77617d;--stage-good-border:#ded1e0;--stage-good-bg:#f6eff6;--stage-pass-text:#68714e;--stage-pass-border:#d9ddc9;--stage-pass-bg:#f4f6ec;--stage-fail-text:#a45049;--stage-fail-border:#e8cbc7;--stage-fail-bg:#fbecea; }
html[data-theme="violet"] { --bg:#f6f4fa;--surface-2:#f9f7fc;--surface-3:#eeeaf7;--text:#282532;--muted:#7d788b;--border:#e2deea;--primary:#6d6291;--success:#657d72;--warning:#a37a3c;--theme-deep:#2e293e;--theme-deep-border:#4a435f;--theme-mid:#413a56;--theme-accent:#716696;--hero-a:#fefcff;--hero-b:#f7f3fb;--hero-c:#ece8f6;--stage-excellent-text:#397379;--stage-excellent-border:#c3dcdd;--stage-excellent-bg:#eaf5f4;--stage-good-text:#596f98;--stage-good-border:#ced8e8;--stage-good-bg:#eef2f9;--stage-pass-text:#5f7567;--stage-pass-border:#d0ddd5;--stage-pass-bg:#f0f5f2;--stage-fail-text:#a35b68;--stage-fail-border:#e8cfd5;--stage-fail-bg:#faeff2; }
html[data-theme="amber"] { --bg:#faf7ef;--surface-2:#fcfaf5;--surface-3:#f3ead8;--text:#30291f;--muted:#85796a;--border:#e8dfd0;--primary:#8a633c;--success:#667b5b;--warning:#a56b25;--theme-deep:#3b3022;--theme-deep-border:#5c4b35;--theme-mid:#51422f;--theme-accent:#9a7045;--hero-a:#fffdf8;--hero-b:#fbf5e9;--hero-c:#f3ead8;--stage-excellent-text:#496d88;--stage-excellent-border:#c8d9e4;--stage-excellent-bg:#edf4f8;--stage-good-text:#6f744f;--stage-good-border:#dbddc6;--stage-good-bg:#f5f5e9;--stage-pass-text:#5c745d;--stage-pass-border:#cfddcf;--stage-pass-bg:#eff6ef;--stage-fail-text:#a6554b;--stage-fail-border:#e9cdc8;--stage-fail-bg:#fbeeea; }
html[data-theme="indigo"] { --bg:#f3f5fa;--surface-2:#f7f8fc;--surface-3:#e9edf7;--text:#232936;--muted:#737d90;--border:#dce1ec;--primary:#50658f;--success:#557768;--warning:#a77935;--theme-deep:#222c43;--theme-deep-border:#394966;--theme-mid:#303e59;--theme-accent:#596f9c;--hero-a:#fcfdff;--hero-b:#f2f5fb;--hero-c:#e9eef8;--stage-excellent-text:#33737a;--stage-excellent-border:#c1dadd;--stage-excellent-bg:#eaf5f5;--stage-good-text:#705f8b;--stage-good-border:#d8d0e4;--stage-good-bg:#f3eff8;--stage-pass-text:#567263;--stage-pass-border:#cfddd5;--stage-pass-bg:#eef5f1;--stage-fail-text:#a4555b;--stage-fail-border:#e8ccd0;--stage-fail-bg:#faedef; }
html[data-theme="plum"] { --bg:#f8f4f7;--surface-2:#fbf8fa;--surface-3:#f2e8ef;--text:#30262d;--muted:#83737e;--border:#e6dce3;--primary:#845c75;--success:#5f786d;--warning:#a47435;--theme-deep:#392933;--theme-deep-border:#57404e;--theme-mid:#4e3846;--theme-accent:#8c627c;--hero-a:#fffdfd;--hero-b:#faf3f7;--hero-c:#f1e7ee;--stage-excellent-text:#417187;--stage-excellent-border:#c5d9e2;--stage-excellent-bg:#ebf4f7;--stage-good-text:#6a668f;--stage-good-border:#d5d2e5;--stage-good-bg:#f1f0f8;--stage-pass-text:#5a7467;--stage-pass-border:#cfddd6;--stage-pass-bg:#eef5f1;--stage-fail-text:#a15457;--stage-fail-border:#e7cbce;--stage-fail-bg:#faedef; }
:root{--ink:var(--text);--line:var(--border);--soft:var(--surface-2);--blue:var(--primary);--blue-2:color-mix(in srgb,var(--primary) 82%,black);--blue-soft:var(--surface-3);--tool:var(--primary);--tool-d:color-mix(in srgb,var(--primary) 82%,black);--tool-s:var(--surface-3);--green:var(--primary);--green-soft:var(--surface-3);--deep:var(--theme-deep);--ok:var(--success);--err:var(--danger);--warn:var(--warning);background:var(--bg);color:var(--text)}
body{background:var(--bg);color:var(--text)}
@media screen{.doc-visual,.lesson-preview{box-shadow:9px 12px 0 -4px var(--surface-3),0 12px 25px color-mix(in srgb,var(--primary) 10%,transparent)}}