/* Shared statement accents: coloured cards remain, but use an ink-like
 * palette rather than saturated UI colours. Body text always stays neutral.
 */
:root {
    --thm-definition: #3c6089;
    --thm-theorem: #99553f;
    --thm-lemma: #32786b;
    --thm-corollary: #8c642c;
    --thm-example: #50734d;
    --thm-convention: #637080;
    --thm-remark: #6b6b68;
    --thm-philosophy: #705c89;
    --thm-bg: rgba(60, 60, 50, 0.025);
    --thm-philosophy-bg: rgba(112, 92, 137, 0.04);
}

@media (prefers-color-scheme: dark) {
    :root {
        --thm-definition: #9cbce1;
        --thm-theorem: #deb09b;
        --thm-lemma: #91c8b8;
        --thm-corollary: #d5be89;
        --thm-example: #a7c69a;
        --thm-convention: #acb8c7;
        --thm-remark: #b9b9b0;
        --thm-philosophy: #c2b0d6;
        --thm-bg: rgba(220, 220, 200, 0.035);
        --thm-philosophy-bg: rgba(194, 176, 214, 0.05);
    }
}

.exercise-group {
    margin: 1em 0 1.4em;
    padding: 0.7em 1em 0.2em;
    border-left: 2px solid var(--rule-color);
    border-radius: 0 var(--radius) var(--radius) 0;
    background: var(--thm-bg);
}

.exercise-group-head {
    font-weight: 600;
}

.exercise-group > .exercise-group-head::before {
    content: "▸";
    display: inline-block;
    width: 1em;
    color: var(--slug-color);
}

.exercise-group[open] > .exercise-group-head::before {
    content: "▾";
}

.exercise-group-body {
    padding-top: 0.4em;
}

.exercise + .exercise {
    margin-top: 1.5em;
    padding-top: 0.8em;
    border-top: 1px solid var(--rule-color);
}

.exercise .section-heading {
    font-size: 1em;
    font-style: italic;
    font-weight: 400;
}

.proof {
    margin: 1em 0 0.8em;
    padding-left: 1em;
    border-left: 1px solid var(--rule-color);
}

.proof-head {
    margin-bottom: 0.4em;
    font-size: 1em;
    font-weight: 400;
    font-style: italic;
}

.proof .qed {
    text-align: right;
    line-height: 1;
}

@media print {
    :root {
        --thm-definition: #3c6089;
        --thm-theorem: #99553f;
        --thm-lemma: #32786b;
        --thm-corollary: #8c642c;
        --thm-example: #50734d;
        --thm-convention: #637080;
        --thm-remark: #6b6b68;
        --thm-philosophy: #705c89;
        --thm-bg: transparent;
        --thm-philosophy-bg: transparent;
    }
}