/* Mission and reading routes share Samplinglib's existing academic theme. */
.ia-home-hero { padding-top: 2.2rem; padding-bottom: 2.2rem; }
.math2-mission { display: flex; align-items: center; gap: 2rem; border-block: 1px solid var(--line); padding: 1.5rem 0; margin: 1rem 0 2rem; }
.math2-mission h2 { font-size: 1.5rem; margin: .4rem 0 .5rem; }
.math2-mission p { max-width: 66ch; margin-bottom: 0; }
.math2-mission > .button { flex-shrink: 0; max-width: 19rem; white-space: normal; }
.math2-reader-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.25rem; }
.math2-hero .lede { max-width: 62ch; }
.math2-layers { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.4rem; margin: 1.8rem 0; }
.math2-layers article { border-top: 2px solid var(--accent); padding: 1rem 0; }
.math2-layers article > span { color: var(--muted); font: .8rem var(--font-ui); }
.math2-layers h2 { font-size: 1.3rem; margin: .6rem 0; }
.math2-layers p { margin: .6rem 0; }
.math2-directions { display: grid; gap: .7rem; }
.math2-direction { border: 1px solid var(--line); background: var(--surface); padding: 0; }
.math2-direction summary { display: flex; align-items: center; gap: 1rem; padding: 1rem 1.2rem; cursor: pointer; }
.math2-direction summary::after { content: "+"; margin-left: auto; font-size: 1.3rem; }
.math2-direction[open] summary::after { content: "−"; }
.math2-direction summary small { display: block; color: var(--muted); font: .8rem var(--font-ui); margin-top: .3rem; }
.math2-number { color: var(--accent); font: 1rem var(--font-ui); min-width: 2rem; }
.math2-direction-body { max-width: 76ch; padding: 0 1.2rem 1.2rem 4.2rem; }
.math2-role { font-size: 1.1rem; }
.math2-boundaries { border-left: 3px solid var(--accent); padding-left: 1.3rem; max-width: 76ch; }
.math2-direction summary:focus-visible { outline: 2px solid var(--accent); outline-offset: -3px; }
@media (max-width: 760px) { .ia-home-hero, .math2-hero { padding-top: 1.8rem; padding-bottom: 1.8rem; } .math2-mission { flex-direction: column; align-items: flex-start; gap: 1rem; } .math2-layers { grid-template-columns: 1fr; gap: .2rem; } .math2-mission > .button { max-width: 100%; } .math2-direction-body { padding-left: 1.2rem; } .math2-direction summary { padding-inline: .8rem; } }