/* Black and matte gold interface; only color declarations, no layout changes. */
:root{--bg:#0b0b0b;--panel:#181818;--ink:#f5f3ee;--muted:#aaa8a2;--line:#303030;--accent:#c6a35e}
body,.topbar{background-color:var(--bg)}
.brand,.mobile-brand,.stats .xp{color:#d0b16f}.brand span{color:#c6a35e}
.primary{background-color:#c6a35e;border-color:#d7ba80;border-bottom-color:#806737;color:#19150e}
.primary:disabled{background-color:#282828;border-color:#353535;color:#92908a}
.nav.active{background-color:#282318;border-color:#665435;color:#dec38a}
button:focus-visible,a:focus-visible,summary:focus-visible{outline-color:#d7b974}
.subject[data-subject="maths"]{color:#d79b97}.subject[data-subject="ses"]{color:#94b6db}.subject[data-subject="svt"]{color:#a1c3aa}
.subject[data-subject="maths"].selected{background-color:#2b1c1b;border-color:#b55249;color:#efb8b1}
.subject[data-subject="ses"].selected{background-color:#192634;border-color:#497faf;color:#b1cdec}
.subject[data-subject="svt"].selected{background-color:#1b3024;border-color:#8ec399;color:#b0e0b9}
main{--subject:#b55249;--subject-soft:#efb8b1;--subject-panel:#271b1a;--subject-edge:#63332e}
main:has(.subject[data-subject="ses"].selected){--subject:#497faf;--subject-soft:#b1cdec;--subject-panel:#19232e;--subject-edge:#304d6a}
main:has(.subject[data-subject="svt"].selected){--subject:#609f76;--subject-soft:#b0e0b9;--subject-panel:#1b2920;--subject-edge:#345e41}
.chapter-banner{background-color:var(--subject-panel);border-color:var(--subject);border-bottom-color:var(--subject-edge)}
.chapter-banner span#chapter-number,.banner-star{color:var(--subject-soft)}
.path-thread path{stroke:var(--subject-edge)}
.level.next:not(.review-node){background-color:var(--subject);border-color:var(--subject-soft);border-bottom-color:var(--subject-edge);color:#fff8ef}
.course-number{color:var(--subject-soft)}
.mastery-row.purple>svg{color:#d79b97}.mastery-row.purple i{background-color:#b55249}
.mastery-row.orange>svg{color:#94b6db}.mastery-row.orange i{background-color:#497faf}
.practice-icon.purple{background-color:#2b1c1b;color:#d79b97}.practice-icon.orange{background-color:#192634;color:#94b6db}
.binder-maths{--cover:#b43e32;--edge:#792e27;--cover-ink:#fff3e8}
.binder-ses{--cover:#2865aa;--edge:#224974;--cover-ink:#f6f4ff}
.binder-svt{--cover:#29805b;--edge:#24563f;--cover-ink:#f0fff6}
.daily-review{background-color:#191919;border-color:#4b4030}.daily-review-start{background-color:#c6a35e;color:#19150e}.daily-review-icon{color:#d0b16f}