/* Learn (/learn and /about/data): 60 seconds, glossary, rankings, data and limits. Foundation in proto.css, shared page parts in pages.css. */
.ln-hero { --art-pos: center 30%; }
.ln-body { padding-top: var(--s-7); }
.ln-body .bf-section { scroll-margin-top: calc(var(--header-h) + 72px); }
.ln-navwrap { position: sticky; top: var(--header-h); z-index: 40; background: rgba(6,10,16,.92); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line-2); }
.ln-nav { padding: 8px 0; }
.ln-nav a { min-height: 44px; }
.ln-h3 { font: 700 22px/1.25 var(--display); margin-bottom: var(--s-3); }

/* ---- 1. story */
.ln-story { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: var(--s-4); counter-reset: s; }
.ln-s { grid-column: span 2; display: flex; flex-direction: column; gap: 12px; padding: 20px 20px 18px; overflow: hidden; }
.ln-s.is-wide { grid-column: span 3; }
.ln-s__n { position: absolute; top: 14px; right: 16px; font: 700 64px/1 var(--display); color: rgba(60,198,244,.12); letter-spacing: -.02em; pointer-events: none; }
.ln-s--2 .ln-s__n { color: rgba(253,192,76,.14); } .ln-s--3 .ln-s__n { color: rgba(255,107,91,.14); } .ln-s--4 .ln-s__n { color: rgba(60,198,244,.12); } .ln-s--5 .ln-s__n { color: rgba(253,192,76,.14); }
.ln-s__t { max-width: 17ch; font: 700 21px/1.2 var(--display); text-wrap: balance; min-height: 2.4em; }
.ln-s.is-wide .ln-s__t { max-width: 26ch; min-height: 0; }
.ln-s__vis { flex: 1; min-height: 150px; display: flex; flex-direction: column; justify-content: center; padding: 14px; background: var(--bg-2); border: 1px solid var(--line-2); }
.ln-s__p { font-size: 15px; line-height: 1.6; color: var(--text-2); }
.ln-nums { display: grid; grid-template-columns: repeat(3, auto); justify-content: space-between; gap: 8px; }
.ln-nums b { display: block; font: 700 clamp(1.4rem, 1rem + 1vw, 1.9rem)/1 var(--display); color: var(--cyan-hi); font-variant-numeric: tabular-nums; }
.ln-nums span { display: block; margin-top: 4px; font: 600 12px/1.2 var(--display); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.ln-dots { display: grid; gap: 8px; justify-content: center; }
.ln-dots > div { display: flex; gap: 6px; justify-content: center; }
.ln-dots i { width: 22px; height: 22px; clip-path: polygon(0 0, 70% 0, 100% 30%, 100% 100%, 30% 100%, 0 70%); }
.ln-dots .a { background: var(--a); box-shadow: 0 0 10px rgba(60,198,244,.5); } .ln-dots .b { background: var(--b); }
.ln-vis__cap { margin-top: 10px; text-align: center; font-size: 13px; color: var(--muted); } .ln-vis__cap b { color: var(--text); font-weight: 600; }
.ln-map { margin: -6px; } .ln-map .bf-map__dot { width: 34px; height: 34px; } .ln-map .bf-map__pt { width: 12px; height: 12px; }
.ln-score { display: grid; gap: 10px; }
.ln-score__n { display: flex; align-items: baseline; gap: 8px; }
.ln-score__n b { font: 700 44px/1 var(--display); color: #fff; letter-spacing: -.02em; }
.ln-score__n span { font-size: 13px; color: var(--muted); }
.ln-score__bar { position: relative; display: block; height: 8px; margin: 14px 0 6px; background: var(--bg); border: 1px solid var(--line-2); }
.ln-score__bar::after { content: ""; position: absolute; left: 50%; top: -5px; bottom: -5px; width: 1px; background: var(--line-3); }
.ln-score__bar i { position: absolute; top: -1px; bottom: -1px; left: calc(var(--lo) * 100%); width: calc((var(--hi) - var(--lo)) * 100%); background: var(--pos-pond); opacity: .8; }
.ln-score__bar b { position: absolute; top: -5px; bottom: -5px; left: calc(var(--sc) * 100% - 1px); width: 3px; background: #fff; box-shadow: 0 0 8px rgba(255,255,255,.7); }
.ln-score__bar em { position: absolute; left: 50%; top: 14px; transform: translateX(-50%); font: 500 12px/1 var(--mono); font-style: normal; color: var(--faint); white-space: nowrap; }
.ln-doors { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-3); margin-top: var(--s-5); }
.ln-door { display: flex; align-items: center; gap: 14px; min-height: 76px; padding: 12px 16px; background: var(--panel); border: 1px solid var(--line-2); color: inherit; text-decoration: none; transition: border-color .2s, background .2s, transform .2s var(--ease); }
.ln-door:hover { border-color: var(--cyan); background: var(--cyan-tint); transform: translateY(-2px); color: inherit; }
.ln-door__ico { display: grid; place-items: center; flex: none; width: 44px; height: 44px; background: var(--cyan); color: var(--on-cyan); clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px); }
.ln-door--2 .ln-door__ico { background: var(--amber); color: var(--on-amber); } .ln-door--3 .ln-door__ico { background: var(--red); color: #1a0705; } .ln-door--4 .ln-door__ico { background: var(--pos-air); color: #14092e; }
.ln-door__ico svg { width: 24px; height: 24px; }
.ln-door b { display: block; font: 700 18px/1.2 var(--display); } .ln-door small { display: block; margin-top: 2px; font-size: 13px; line-height: 1.35; color: var(--muted); }

/* ---- 2. glossary */
.ln-gtools { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; }
.ln-gtools .pg-search { flex: 1 1 320px; }
.ln-gstatus { margin: 12px 0 var(--s-4); }
.ln-glossary { display: grid; gap: var(--s-6); }
.ln-gh { display: flex; align-items: center; gap: 12px; margin-bottom: var(--s-3); font: 700 13px/1.3 var(--display); letter-spacing: .16em; text-transform: uppercase; color: var(--cyan); }
.ln-gh::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--line-2), transparent); }
.ln-gh small { order: 3; font: 600 12px/1 var(--mono); color: var(--faint); letter-spacing: 0; }
.ln-gcols { column-count: 3; column-gap: var(--s-3); }
.ln-term { break-inside: avoid; margin-bottom: var(--s-3); padding: 16px 18px; scroll-margin-top: calc(var(--header-h) + 90px); display: flex; flex-direction: column; gap: 8px; }
.ln-term.is-target { border-color: var(--amber); box-shadow: 0 0 0 1px var(--amber), 0 0 34px rgba(253,192,76,.2); animation: ln-flash 2.2s ease-out 1; }
@keyframes ln-flash { 0% { background: var(--amber-tint); } 100% { background: transparent; } }
.ln-term__h { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.ln-term h3 { font: 700 20px/1.25 var(--display); padding-top: 6px; }
.ln-term mark { background: rgba(253,192,76,.22); color: var(--amber-hi); padding: 0 2px; }
.ln-term__link { width: 40px; height: 40px; flex: none; }
.ln-term__link svg { width: 18px; height: 18px; }
.ln-term__s { font-size: 15px; line-height: 1.55; color: var(--text); }
.ln-term__m { padding-top: 8px; border-top: 1px solid var(--line); font-size: 13px; line-height: 1.55; color: var(--muted); }
.ln-term__see { min-height: 36px; padding-top: 2px; font-size: 12px; }

/* ---- 3. rankings */
.ln-three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s-4); }
.ln-num { display: flex; flex-direction: column; gap: 10px; }
.ln-num .bf-tag { align-self: flex-start; }
.ln-num h3 { font: 700 26px/1.1 var(--display); }
.ln-num__vis { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 10px; min-height: 48px; padding: 8px 0; }
.ln-num__vis .bf-os { font-size: 15px; padding: 4px 10px; }
.ln-big { font: 700 40px/1 var(--display); color: var(--cyan-hi); letter-spacing: -.02em; }
.ln-num__vis small { font-size: 13px; color: var(--muted); }
.ln-num p { font-size: 15px; line-height: 1.6; color: var(--text-2); }
.ln-weights { margin-top: var(--s-4); }
.ln-weights__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 16px; margin-bottom: var(--s-4); }
.ln-wbar { display: flex; gap: 4px; height: 76px; }
.ln-wbar button { flex: var(--w) 1 0; min-width: 0; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: 4px; padding: 0 14px; border: 1px solid var(--line-3); background: linear-gradient(180deg, var(--panel-3), var(--panel-2)); color: var(--text-2); text-align: left; transition: background .2s, border-color .2s; overflow: hidden; }
.ln-wbar button:nth-child(1) { --c: var(--cyan); } .ln-wbar button:nth-child(2) { --c: var(--amber); } .ln-wbar button:nth-child(3) { --c: var(--pos-air); } .ln-wbar button:nth-child(4) { --c: var(--pos-geo-sea); }
.ln-wbar button b { font: 700 24px/1 var(--display); color: var(--c); }
.ln-wbar button span { font: 600 12px/1.2 var(--display); letter-spacing: .08em; text-transform: uppercase; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.ln-wbar button:hover { border-color: var(--c); }
.ln-wbar button[aria-pressed="true"] { border-color: var(--c); background: linear-gradient(180deg, color-mix(in srgb, var(--c) 22%, var(--panel-3)), var(--panel-2)); box-shadow: inset 0 -4px 0 var(--c); color: #fff; }
.ln-wcards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-top: 12px; }
.ln-wcards article { padding: 12px 14px; border: 1px solid var(--line); background: var(--bg-2); opacity: .7; transition: opacity .2s, border-color .2s; }
.ln-wcards article:nth-child(1) { --c: var(--cyan); } .ln-wcards article:nth-child(2) { --c: var(--amber); } .ln-wcards article:nth-child(3) { --c: var(--pos-air); } .ln-wcards article:nth-child(4) { --c: var(--pos-geo-sea); }
.ln-wcards article.is-on { opacity: 1; border-color: var(--c); background: color-mix(in srgb, var(--c) 8%, var(--bg-2)); }
.ln-wcards h4 { font: 700 15px/1.3 var(--display); letter-spacing: .02em; } .ln-wcards h4 small { color: var(--c); font-size: 14px; margin-left: 4px; }
.ln-wcards p { margin-top: 4px; font-size: 13px; line-height: 1.5; color: var(--text-2); }
.ln-rk2 { margin-top: var(--s-6); }
.ln-ex__head { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 10px; }
.ln-ex__head a { color: var(--cyan-hi); }
.ln-ex__score { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 24px; margin-top: var(--s-4); }
.ln-ex__score > div:first-child b { display: block; font: 700 54px/1 var(--display); color: #fff; letter-spacing: -.02em; }
.ln-ex__score > div:first-child span { font-size: 13px; color: var(--muted); }
.ln-rules { margin-top: var(--s-4); }
.ln-rules .pg-step { padding-bottom: var(--s-4); }
.ln-rules .pg-step__b h3 { font-size: 18px; }
.ln-not { margin-top: var(--s-6); }
.ln-method { margin-top: var(--s-4); max-width: 100ch; }

/* ---- 4. data */
.ln-dcards { display: grid; gap: var(--s-4); }
.ln-dcards article p { margin-top: 10px; font-size: 15px; line-height: 1.65; color: var(--text-2); max-width: 72ch; }
.ln-dcards article p b { color: var(--text); font-weight: 600; }
.ln-dcards article a { color: var(--cyan-hi); }
.ln-side { display: grid; gap: var(--s-4); position: sticky; top: calc(var(--header-h) + 84px); }
.ln-live { display: grid; gap: 0; margin-top: var(--s-3); }
.ln-live > div { padding: 10px 0; border-bottom: 1px solid var(--line); }
.ln-live > div:last-child { border-bottom: 0; }
.ln-live dt { font: 600 12px/1.3 var(--display); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.ln-live dd { margin: 3px 0 0; font: 600 16px/1.4 var(--body); color: var(--text); }
.ln-live dd small { display: block; margin-top: 2px; font: 400 13px/1.45 var(--body); color: var(--muted); }
.ln-live a { color: var(--cyan-hi); }
.ln-cancan .pg-list { margin-top: 8px; }
.ln-can, .ln-cannot { margin-top: 12px; }
.ln-can { color: var(--cyan-hi); } .ln-cannot { color: var(--amber-hi); }
.ln-cannotlist > li::before { background: var(--amber); box-shadow: 0 0 8px rgba(253,192,76,.6); }
.ln-lens { margin-top: var(--s-4); }
.ln-lens th[scope="row"] { position: static; background: none; color: var(--text); font: 700 15px/1.3 var(--display); letter-spacing: .02em; text-transform: none; white-space: normal; border-bottom: 1px solid var(--line); vertical-align: top; min-width: 150px; }
.ln-lens td { vertical-align: top; font-size: 14px; line-height: 1.55; color: var(--text-2); border-bottom: 1px solid var(--line); }
.ln-end { display: flex; align-items: center; justify-content: space-between; gap: var(--s-5); }
.ln-end .bf-h3 { margin-bottom: 4px; }

@media (max-width: 1100px) {
  .ln-story { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ln-s, .ln-s.is-wide { grid-column: span 1; }
  .ln-s__t { min-height: 0; max-width: none; }
  .ln-doors { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ln-three { grid-template-columns: minmax(0, 1fr); }
  .ln-gcols { column-count: 2; }
  .ln-wcards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ln-side { position: static; }
}
@media (max-width: 760px) {
  .ln-body .bf-section { scroll-margin-top: calc(var(--header-h) + 64px); }
  .ln-story { grid-template-columns: minmax(0, 1fr); gap: var(--s-3); }
  .ln-s { padding: 16px 16px 14px; } .ln-s__n { font-size: 52px; }
  .ln-doors { grid-template-columns: minmax(0, 1fr); }
  .ln-gcols { column-count: 1; }
  .ln-term { padding: 14px 16px; }
  .ln-wbar { height: 64px; gap: 3px; }
  .ln-wbar button { padding: 0 8px; } .ln-wbar button b { font-size: 18px; } .ln-wbar button span { font-size: 12px; letter-spacing: .04em; }
  .ln-wcards { grid-template-columns: minmax(0, 1fr); }
  .ln-ex__score { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .ln-end { flex-direction: column; align-items: flex-start; }
  .ln-lens .bf-table { min-width: 560px; }
}

.ln-term__tog { display: none; }
@media (max-width: 760px) {
  .ln-term__tog { display: inline-flex; align-items: center; align-self: flex-start; min-height: 44px; padding: 0 12px; margin: -6px 0 -4px -12px; border: 0; background: none; color: var(--cyan); font: 600 12px/1 var(--display); letter-spacing: .1em; text-transform: uppercase; }
  .ln-term__tog::after { content: ""; width: 7px; height: 7px; margin-left: 8px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: translateY(-2px) rotate(45deg); }
  .ln-term__tog[aria-expanded="true"]::after { transform: translateY(2px) rotate(-135deg); }
  .ln-term:not(.is-open) .ln-term__m { display: none; }
  .ln-term__see { min-height: 32px; }
  .ln-term { gap: 6px; }
}

details.ln-gblock > summary.ln-gh { list-style: none; cursor: pointer; min-height: 44px; margin-bottom: var(--s-2); }
details.ln-gblock > summary.ln-gh::-webkit-details-marker { display: none; }
details.ln-gblock > summary.ln-gh::before { content: ""; width: 8px; height: 8px; border-right: 2px solid var(--cyan); border-bottom: 2px solid var(--cyan); transform: translateY(-2px) rotate(-45deg); transition: transform .2s; flex: none; }
details.ln-gblock[open] > summary.ln-gh::before { transform: translateY(-2px) rotate(45deg); }
details.ln-gblock > summary.ln-gh:hover { color: var(--cyan-hi); }