/* ExamStudyAid — subject hues outside the board pages.

   The dashboard (owner 2026-10-02, option C) wears each subject in the hue its
   row has on the board pages: Biology green, Chemistry cyan, Physics blue and
   so on. The values are subject-rows.css's table, one for one; change both
   together. An element names its subject with data-subject (or a dashboard
   level with data-dm-subject) by its slug, or its route slug with the board after it
   (biology-ap, biology-igcse-cie, when two boards share the subject), and reads:
     --subject-hue   tiles, web lines and points, progress fills
     --subject-text  words (by day the paler hues are deepened to read on paper)
*/

/* ── Night ── */
:is([data-subject], [data-dm-subject]) { --subject-hue: var(--nb-blue); --subject-text: var(--subject-hue); }
:is([data-subject^="biology"], [data-dm-subject^="biology"]) { --subject-hue: #4fd49b; }
:is([data-subject^="physics"], [data-dm-subject^="physics"]) { --subject-hue: #62a0ff; }
:is([data-subject^="chemistry"], [data-dm-subject^="chemistry"]) { --subject-hue: #36c9d8; }
:is([data-subject^="mathematics"], [data-subject="math"], [data-subject^="math-"],
    [data-dm-subject^="mathematics"], [data-dm-subject="math"], [data-dm-subject^="math-"]) { --subject-hue: #8ea6ff; }
:is([data-subject^="further-mathematics"], [data-subject^="calculus-ab"],
    [data-dm-subject^="further-mathematics"], [data-dm-subject^="calculus-ab"]) { --subject-hue: #f3b64c; }
:is([data-subject^="pure-mathematics"], [data-subject^="calculus-bc"],
    [data-dm-subject^="pure-mathematics"], [data-dm-subject^="calculus-bc"]) { --subject-hue: #ff8a6e; }
:is([data-subject^="english"], [data-subject^="reading"], [data-subject^="writing"], [data-subject^="psychology"],
    [data-dm-subject^="english"], [data-dm-subject^="reading"], [data-dm-subject^="writing"], [data-dm-subject^="psychology"]) { --subject-hue: #f28ba4; }
:is([data-subject^="business"], [data-subject^="economics"],
    [data-dm-subject^="business"], [data-dm-subject^="economics"]) { --subject-hue: #a9d65c; }

/* ── Day: the same hue, deep enough to read on paper ── */
html.theme-light :is([data-subject^="biology"], [data-dm-subject^="biology"]) { --subject-hue: #16814f; --subject-text: #11764a; }
html.theme-light :is([data-subject^="physics"], [data-dm-subject^="physics"]) { --subject-hue: #1d5fd8; }
html.theme-light :is([data-subject^="chemistry"], [data-dm-subject^="chemistry"]) { --subject-hue: #0a7f8c; --subject-text: #08727e; }
html.theme-light :is([data-subject^="mathematics"], [data-subject="math"], [data-subject^="math-"],
    [data-dm-subject^="mathematics"], [data-dm-subject="math"], [data-dm-subject^="math-"]) { --subject-hue: #3b53cc; }
html.theme-light :is([data-subject^="further-mathematics"], [data-subject^="calculus-ab"],
    [data-dm-subject^="further-mathematics"], [data-dm-subject^="calculus-ab"]) { --subject-hue: #a8650a; --subject-text: #975a08; }
html.theme-light :is([data-subject^="pure-mathematics"], [data-subject^="calculus-bc"],
    [data-dm-subject^="pure-mathematics"], [data-dm-subject^="calculus-bc"]) { --subject-hue: #c2432a; --subject-text: #b53c25; }
html.theme-light :is([data-subject^="english"], [data-subject^="reading"], [data-subject^="writing"], [data-subject^="psychology"],
    [data-dm-subject^="english"], [data-dm-subject^="reading"], [data-dm-subject^="writing"], [data-dm-subject^="psychology"]) { --subject-hue: #b0385a; }
html.theme-light :is([data-subject^="business"], [data-subject^="economics"],
    [data-dm-subject^="business"], [data-dm-subject^="economics"]) { --subject-hue: #4e7d12; --subject-text: #446e0f; }

/* ── The dashboard's chapter bars: the owner's mockup blue (2026-10-02: "copy
   the color of the bar"), the same on every subject; by day the desk blue. ── */
.nb-dm { --nb-m-bar: #4b8ef8; }
html.theme-light .nb-dm { --nb-m-bar: #175be8; }