/* Home and topic pages. Builds on lesson.css tokens. */
.page { max-width: 40rem; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); display: flex; flex-direction: column; gap: 1.75rem; }
.page > header { padding-top: 1.5rem; display: flex; flex-direction: column; gap: .5rem; }
.crumbs { font: 500 .85rem var(--sans); color: var(--muted); display: flex; flex-wrap: wrap; gap: .35rem; }
.crumbs a { color: var(--accent); text-decoration: none; }
.group { display: flex; flex-direction: column; gap: .6rem; }
.group > h2 { margin: 0; font: 600 .8rem var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.branch { border-top: 1px solid var(--line); padding-top: 1rem; display: flex; flex-direction: column; gap: .75rem; }
.branch > h2 { margin: 0; }
.branch > p { margin: 0; color: var(--muted); font: .95rem/1.5 var(--sans); }
.sub { display: flex; flex-direction: column; gap: .45rem; }
.sub > h3 { margin: .25rem 0 0; font: 600 .78rem var(--sans); letter-spacing: .07em; text-transform: uppercase; color: var(--muted); }
.leaf { display: grid; grid-template-columns: 1fr auto; gap: .2rem .75rem; align-items: center; padding: .8rem .95rem; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; text-decoration: none; color: var(--ink); min-height: 44px; }
.leaf:hover { border-color: var(--accent); }
.leaf:focus-visible, .lesson-row:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.leaf .t { font: 650 1.08rem/1.3 var(--serif); min-width: 0; }
.leaf .d { grid-column: 1 / -1; font: .9rem/1.45 var(--sans); color: var(--muted); }
.leaf.planned { background: transparent; }
.leaf.planned .t { color: var(--muted); }
.chip { font: 600 .72rem var(--sans); letter-spacing: .04em; padding: .2rem .5rem; border-radius: 999px; background: var(--accent-soft); color: var(--accent); white-space: nowrap; font-variant-numeric: tabular-nums; }
.chip.quiet { background: transparent; color: var(--muted); border: 1px solid var(--line); }
.chip.done { background: var(--good-soft); color: var(--good); }
.path { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: .5rem; }
.lesson-row { display: grid; grid-template-columns: 2rem 1fr auto; gap: .15rem .75rem; align-items: start; padding: .8rem .95rem; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--ink); text-decoration: none; }
a.lesson-row:hover { border-color: var(--accent); }
.lesson-row .n { font: 650 1.1rem/1.3 var(--serif); color: var(--muted); font-variant-numeric: tabular-nums; }
.lesson-row .t { font: 600 1rem/1.35 var(--sans); min-width: 0; }
.lesson-row .g { grid-column: 2 / -1; font: .9rem/1.45 var(--sans); color: var(--muted); }
.lesson-row.unwritten { background: transparent; }
.lesson-row.unwritten .t { color: var(--muted); font-weight: 500; }
.lesson-row.next { border-color: var(--accent); }
.prose { font: 1rem/1.6 var(--sans); color: var(--ink); }
.prose p { margin: 0 0 .6rem; }
.foot { border-top: 1px solid var(--line); padding-top: 1rem; display: flex; flex-direction: column; gap: .75rem; font: .9rem/1.5 var(--sans); color: var(--muted); }
.foot p { margin: 0; }
.backup { display: flex; flex-direction: column; gap: .5rem; }
.backup textarea { font: .8rem var(--mono); min-height: 4.5rem; border: 1px solid var(--line); border-radius: 10px; padding: .5rem .6rem; background: var(--panel); color: var(--ink); width: 100%; }
.backup .row { display: flex; gap: .5rem; flex-wrap: wrap; }
.backup .kit-btn { text-align: center; }
.continue:empty, .continue-wrap:has(.continue:empty) { display: none; }