/* Talaan Academy scroll lessons: steps on the left, a sticky "screen" of slides on the right, check questions at the end.
   Shared by every lesson page in www/learn/. */
.ls { padding-top: 32px; }
.ls-head { max-width: 760px; }
.ls-meta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 16px; font: var(--type-label-caps); letter-spacing: .08em; text-transform: uppercase; color: var(--text-tertiary); }
/* reading progress for the current section */
.ls-bar { position: sticky; top: 68px; z-index: 5; height: 4px; background: var(--border-subtle); margin-top: 28px; }
.ls-bar i { display: block; height: 100%; width: 0; background: var(--marker); transition: width .2s; }
/* course band (templates/talaan/academy_map.html): full-width band under the site menu, bar aligned to the page */
.cband { background: var(--surface-page); border-bottom: 1px solid var(--border-default); }
.cmap { position: relative; display: flex; gap: 14px; align-items: flex-start; padding: 12px 0 10px; }
.cmap-k { flex: none; font: 600 11px var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--text-secondary); text-decoration: none; margin-top: 17px; }
.cmap-k:hover { color: var(--text-primary); }
.cmap-bar { flex: 1; min-width: 0; display: flex; gap: 14px; }
.cmap-p { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.cmap-pn { font: 600 10.5px var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--mustard-400); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cmap-ls { display: flex; gap: 6px; }
.cmap-l { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.cmap-seg { display: flex; height: 10px; border-radius: 5px; background: var(--ink-100); }
.cmap-seg .cell { position: relative; flex: 1; min-width: 0; }
.cmap-seg .cell:first-child { border-radius: 5px 0 0 5px; } .cmap-seg .cell:last-child { border-radius: 0 5px 5px 0; }
.cmap-seg .cell:only-child { border-radius: 5px; }
.cmap-seg .cell.done { background: var(--ink-900); }
.cmap-seg .cell.on { background: var(--vermilion-500); }
.cmap-seg a.cell:hover { box-shadow: inset 0 0 0 2px var(--ink-900); }
.cmap-seg a.cell.done:hover, .cmap-seg a.cell.on:hover { box-shadow: inset 0 0 0 2px #fff; }
.cmap-n { font: 500 10.5px var(--font-mono); color: var(--text-tertiary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cmap-l.cur .cmap-n { color: var(--text-primary); font-weight: 700; }
.cmap-pct { flex: none; margin-top: 14px; font: 700 13px var(--font-mono); color: var(--text-primary); min-width: 3ch; text-align: right; }
.cmap-cur, .cmap-all { display: none; }
/* tooltip: the title only */
.cmap [data-t]:hover::after { content: attr(data-t); position: absolute; left: 50%; top: calc(100% + 8px); transform: translateX(-50%); z-index: 10; white-space: nowrap; padding: 5px 9px; border-radius: var(--radius-sm); background: var(--ink-900); color: #fff; font: 600 12px var(--font-sans); pointer-events: none; }
.cmap .cmap-l:first-child [data-t]:hover::after { left: 0; transform: none; }
.cmap .cmap-l:last-child [data-t]:hover::after { left: auto; right: 0; transform: none; }
/* black band (in use: academy_map.html sets .dark) */
.cband.dark { background: var(--ink-900); border-bottom: 0; }
.cband.dark .cmap-k { color: var(--ink-400); } .cband.dark .cmap-k:hover { color: #fff; }
.cband.dark .cmap-seg { background: color-mix(in srgb, var(--bone) 18%, transparent); }
.cband.dark .cmap-seg .cell.done { background: var(--bone); }
.cband.dark .cmap-seg .cell.on { background: var(--vermilion-500); }
.cband.dark .cmap-seg a.cell:hover { box-shadow: inset 0 0 0 2px #fff; }
.cband.dark .cmap-seg a.cell.done:hover { box-shadow: inset 0 0 0 2px var(--vermilion-500); }
.cband.dark .cmap-n { color: var(--ink-400); }
.cband.dark .cmap-l.cur .cmap-n { color: #fff; }
.cband.dark .cmap-pct { color: var(--mustard-400); }
.cband.dark .cmap-cur { color: #fff; }
.cband.dark [data-t]:hover::after { background: #fff; color: var(--ink-900); }
@media (max-width: 700px) {
  /* phones: bar without names, then one line with the current lesson and the %; the whole band opens the course list */
  .cmap { flex-wrap: wrap; gap: 6px 10px; padding: 10px 0 8px; }
  .cmap-k, .cmap-n, .cmap-pn { display: none; }
  .cmap-ls { gap: 3px; }
  .cmap-bar { flex: 1 0 100%; gap: 6px; }
  .cmap-cur { display: block; order: 2; flex: 1; font: 600 12px var(--font-mono); color: var(--text-primary); }
  .cmap-pct { order: 3; margin-top: 0; font-size: 12px; }
  .cmap-all { display: block; position: absolute; inset: 0; z-index: 2; }
  .cmap [data-t]:hover::after { display: none; }
}
.ls-story { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 48px; margin-top: 8px; }
.ls-steps { padding: 18vh 0 30vh; }
.ls-step { min-height: 62vh; display: flex; flex-direction: column; justify-content: center; opacity: .32; transition: opacity .3s; }
.ls-step.on { opacity: 1; }
.ls-step .n { font: var(--type-overline); letter-spacing: var(--ls-mono-caps); color: var(--text-tertiary); }
.ls-step h2 { font: var(--fw-bold) 28px/1.15 var(--font-display); letter-spacing: -.02em; margin: 8px 0 10px; }
.ls-step p { margin: 0 0 10px; font-size: 16px; line-height: 1.65; color: var(--text-secondary); max-width: 520px; }
.ls-step p b { color: var(--text-primary); }
.ls-screen { position: sticky; top: 96px; height: calc(100vh - 130px); max-height: 620px; display: grid; }
.ls-slide { grid-area: 1 / 1; align-self: center; opacity: 0; transform: translateY(10px); transition: opacity .35s, transform .35s; pointer-events: none; }
.ls-slide.on { opacity: 1; transform: none; pointer-events: auto; }
.ls-paper { background: var(--surface-card); border: 1px solid var(--border-default); border-top: var(--rule-w) solid var(--border-heavy); border-radius: var(--radius-xl); padding: 22px 24px; box-shadow: var(--shadow-md); }
.ls-paper h3 { margin: 0 0 14px; font: var(--type-section); letter-spacing: .3em; text-transform: uppercase; display: flex; justify-content: space-between; }
.ls-paper h3 small { font: var(--type-overline); letter-spacing: .06em; color: var(--text-tertiary); text-transform: none; }
.ls-rows { width: 100%; border-collapse: collapse; font-size: 14px; }
.ls-rows td { padding: 7px 0; border-top: 1px solid var(--border-subtle); }
.ls-rows td.r { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.ls-rows tr.tot td { border-top: 1.5px solid var(--border-heavy); font-weight: 700; }
.ls-rows tr.hl td { background: var(--status-pending-bg); }
.ls-rows .neg { color: var(--oxblood-600); }
.ls-je { width: 100%; border-collapse: collapse; font-size: 14px; }
.ls-je th { text-align: left; font: var(--type-label-caps); letter-spacing: .08em; text-transform: uppercase; color: var(--text-secondary); background: var(--surface-sunken); padding: 7px 10px; }
.ls-je th.r, .ls-je td.r { text-align: right; }
.ls-je td { padding: 8px 10px; border-top: 1px solid var(--border-subtle); font-variant-numeric: tabular-nums; }
.ls-je td.cr { padding-left: 28px; }
.ls-je tr.tot td { border-top: 1.5px solid var(--border-heavy); font-weight: 700; }
.ls-note { margin-top: 12px; font-size: 13px; color: var(--text-tertiary); }
.ls-math { font: var(--fw-bold) 22px/1.4 var(--font-sans); font-variant-numeric: tabular-nums; }
.ls-math span { color: var(--text-tertiary); font-weight: 400; }
.ls-flow { display: grid; gap: 8px; }
.ls-flow div { display: grid; grid-template-columns: 1fr auto 150px; gap: 10px; align-items: center; padding: 10px 12px; background: var(--surface-card); border: 1px solid var(--border-default); border-left: 4px solid var(--c); border-radius: var(--radius-sm); font-size: 14px; }
.ls-flow b { font-variant-numeric: tabular-nums; }
.ls-flow em { font-style: normal; font: var(--fw-semibold) 12px var(--font-mono); color: var(--text-secondary); text-align: right; }
.ls-co { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: center; }
.ls-co dl { display: grid; grid-template-columns: 120px 1fr; gap: 6px 12px; margin: 0; font-size: 14px; }
.ls-co dt { font: var(--type-label-caps); letter-spacing: .08em; text-transform: uppercase; color: var(--text-tertiary); padding-top: 2px; }
.ls-co dd { margin: 0; }
.ls-check { margin: 40px 0 0; padding: 28px; background: var(--surface-card); border: 1px solid var(--border-default); border-top: var(--rule-w) solid var(--border-heavy); border-radius: var(--radius-xl); max-width: 820px; }
.ls-check h2 { font: var(--fw-bold) 26px/1.2 var(--font-display); margin: 0 0 6px; }
.ls-q { margin-top: 22px; }
.ls-q p { font-weight: 600; margin: 0 0 8px; }
.ls-q label { display: flex; gap: 10px; align-items: flex-start; padding: 9px 12px; border: 1px solid var(--border-default); border-radius: var(--radius-sm); margin-top: 6px; cursor: pointer; font-size: 15px; }
.ls-q label:hover { background: var(--surface-hover); }
.ls-q input { margin-top: 4px; accent-color: var(--ink-900); }
.ls-q label.right { border-color: var(--status-accepted-border); background: var(--status-accepted-bg); }
.ls-q label.wrong { border-color: var(--status-rejected-border); background: var(--status-rejected-bg); }
.ls-q .why { margin-top: 8px; font-size: 14px; color: var(--text-secondary); display: none; }
.ls-q.done .why { display: block; }
.ls-score { margin-top: 18px; font-weight: 600; }
@media (max-width: 900px) {
  .ls-story { grid-template-columns: 1fr; gap: 0; }
  .ls-screen { position: sticky; top: 72px; height: auto; max-height: none; z-index: 2; background: var(--surface-card); padding: 10px 0; order: -1; }  /* slides first, held under the header while the steps scroll past */
  .ls-slide { transform: none; }
  .ls-paper { padding: 14px 16px; box-shadow: none; }
  .ls-steps { padding: 4vh 0 10vh; }
  .ls-step { min-height: 45vh; justify-content: flex-start; padding-top: 20px; }
  .ls-co dl { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .ls-slide, .ls-step { transition: none; } }

/* end of a section: hand-off to the check page */
.ls-end { margin: 40px 0 0; padding: 28px; background: var(--surface-card); border: 1px solid var(--border-default); border-top: var(--rule-w) solid var(--border-heavy); border-radius: var(--radius-xl); max-width: 820px; }
.ls-end h2 { font: var(--fw-bold) 26px/1.2 var(--font-display); margin: 0 0 6px; }
.ls-end p { margin: 0 0 16px; color: var(--text-secondary); }
/* check page */
.ck { padding-top: 48px; max-width: 820px; }
.ck .ls-q { background: var(--surface-card); border: 1px solid var(--border-default); border-radius: var(--radius-xl); padding: 18px 20px; }
.ck-next { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }

/* previous / next section */
.ls-pn { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 28px 0 0; max-width: 820px; }
.ls-pn a { display: flex; flex-direction: column; gap: 4px; padding: 14px 16px; border: 1px solid var(--border-default); border-radius: var(--radius-lg); background: var(--surface-card); color: var(--text-primary); text-decoration: none; font-weight: 600; font-size: 15px; line-height: 1.35; }
.ls-pn a:hover { border-color: var(--ink-900); }
.ls-pn a.nx { text-align: right; grid-column: 2; }
.ls-pn small { font: var(--type-label-caps); letter-spacing: .08em; text-transform: uppercase; color: var(--text-tertiary); font-weight: 500; }
.ls-head .crumbs { margin-bottom: 4px; }
.ls-back { display: inline-block; margin-top: 10px; font: 600 11px var(--font-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--text-secondary); text-decoration: none; max-width: 100%; }
.ls-back:hover { color: var(--ink-900); text-decoration: underline; }
@media (max-width: 600px) { .ls-pn { grid-template-columns: 1fr; } .ls-pn a.nx { grid-column: 1; } }

/* a new lesson: dark "Next lesson" card at the end of the previous one */
.ls-pn a.nl { background: var(--ink-900); border-color: var(--ink-900); color: #fff; }
.ls-pn a.nl small { color: var(--mustard-400); }
.ls-pn a.nl b { font: 800 19px/1.2 var(--font-display); }
.ls-pn a.nl span { font-size: 13px; font-weight: 500; color: var(--ink-300); }
.ls-pn a.nl:hover { border-color: var(--vermilion-500); }