/* Methods hub: a readable document index and source catalogue. */
* { box-sizing: border-box; }
html { scroll-padding-top: 28px; }
body { margin: 0; background: var(--bg-1); color: var(--fg-1); font: 400 16px/1.6 var(--font-body); }
button, input { font: inherit; }
button, a, input { -webkit-tap-highlight-color: transparent; }
a { color: var(--clean); }
a, button { touch-action: manipulation; }
:is(a, button, input):focus-visible { outline: 2px solid var(--clean); outline-offset: 4px; }
[hidden] { display: none !important; }
.wrap { width: 100%; max-width: 1280px; margin-inline: auto; padding-inline: 32px; }
.hub-hero { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 12px 56px; padding-block: 24px 44px; border-bottom: 1px solid var(--line-2); }
.kicker-row { grid-column: 1 / -1; display: flex; align-items: center; gap: 20px; margin-bottom: 24px; }
.kicker-tag { color: var(--clean); font: 600 12px/1.4 var(--font-body); letter-spacing: .1em; text-transform: uppercase; }
.kicker-rule { flex: 1; height: 1px; background: var(--line-2); }
.lang-toggle { display: flex; flex-shrink: 0; border: 1px solid var(--line-3); border-radius: 4px; padding: 3px; gap: 2px; background: var(--bg-2); }
.lang-btn { min-width: 44px; min-height: 40px; padding: 0 10px; border: 0; border-radius: 2px; background: none; color: var(--fg-3); cursor: pointer; font: 600 12px var(--font-body); }
.lang-btn.active { background: var(--clean-soft); color: var(--clean); }
.lang-btn:hover { color: var(--fg-1); }
.eyebrow { grid-column: 1 / -1; color: var(--fg-3); font: 400 12px/1.5 var(--font-body); letter-spacing: .015em; }
h1 { margin: 0; font: 600 clamp(36px,4vw,54px)/1.08 var(--font-display); letter-spacing: -.035em; max-width: 17ch; }
.subtitle { margin: 0; color: var(--fg-2); font-size: 18px; line-height: 1.65; max-width: 60ch; }
.hub-main { display: grid; grid-template-columns: 200px minmax(0,1fr); gap: 48px; padding-top: 40px; }
.hub-body { min-width: 0; }
.hub-index { position: sticky; top: 28px; align-self: start; }
.hub-index-title { color: var(--fg-3); font: 600 11px/1.5 var(--font-body); letter-spacing: .08em; text-transform: uppercase; margin-bottom: 16px; }
.hub-index nav { display: grid; }
.hub-index a { display: flex; gap: 12px; align-items: baseline; min-height: 48px; padding: 12px 0 12px 14px; border-left: 2px solid var(--line-2); color: var(--fg-3); font-size: 14px; line-height: 1.4; text-decoration: none; }
.index-num { flex-shrink: 0; font: 400 11px/1.5 var(--font-mono); color: var(--fg-4); }
.hub-index a[aria-current] { border-color: var(--clean); color: var(--fg-1); background: linear-gradient(90deg,var(--clean-soft),transparent); }
.hub-index a:hover { color: var(--fg-1); border-color: var(--clean); }
.hub-sec { padding-bottom: 56px; }
.sec-label { display: flex; align-items: baseline; justify-content: space-between; gap: 16px 24px; flex-wrap: wrap; padding-bottom: 16px; margin-bottom: 24px; border-bottom: 1px solid var(--line-3); }
.sec-label h2 { margin: 0; font: 600 22px/1.3 var(--font-display); letter-spacing: -.02em; }
.sec-label .meta { color: var(--fg-3); font-size: 12px; line-height: 1.5; }
.framework { border: 1px solid var(--line-3); border-left: 3px solid var(--clean); border-radius: 6px; background: var(--bg-2); padding: 28px; }
.fw-name { font: 600 27px/1.25 var(--font-display); letter-spacing: -.025em; }
.fw-name span { color: var(--clean); }
.fw-desc { color: var(--fg-2); max-width: 72ch; margin: 16px 0 24px; font-size: 16px; line-height: 1.65; }
.fw-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn-a, .btn-b { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 44px; padding: 10px 16px; border: 1px solid var(--line-3); border-radius: 4px; font-size: 14px; font-weight: 600; line-height: 1.4; text-decoration: none; }
.btn-a { color: #06140d; background: var(--clean); border-color: var(--clean); }
.btn-a:hover { background: #52bd80; }
.btn-b { color: var(--fg-1); }
.btn-b::before { content: '\2193'; font-size: 17px; }
.btn-b:hover { border-color: var(--clean); background: var(--clean-soft); }
.fw-note { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line-2); color: var(--fg-3); font-size: 14px; line-height: 1.6; }
.fw-note a { text-underline-offset: 3px; }
.cards { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.mcard { display: flex; flex-direction: column; gap: 16px; padding: 22px; border: 1px solid var(--line-3); border-radius: 6px; background: var(--bg-2); text-decoration: none; }
.mcard:hover { border-color: var(--clean); background: var(--bg-3); }
.mc-name { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; font: 600 18px/1.35 var(--font-display); color: var(--fg-1); }
.mc-name .arrow { color: var(--clean); flex-shrink: 0; }
.mc-desc { color: var(--fg-2); font-size: 15px; line-height: 1.6; }
.src-meta { color: var(--fg-2); font-size: 16px; line-height: 1.65; margin: 0 0 24px; }
.source-tools { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin: 0 0 12px; padding-bottom: 24px; border-bottom: 1px solid var(--line-3); }
.source-search { display: grid; gap: 8px; width: min(100%,420px); min-width: 0; color: var(--fg-2); font-size: 14px; }
.source-search input { width: 100%; min-width: 0; min-height: 44px; padding: 10px 12px; border: 1px solid var(--line-3); border-radius: 4px; background: var(--bg-2); color: var(--fg-1); font-size: 15px; color-scheme: dark; }
.source-search input::placeholder { color: var(--fg-3); }
.source-count { padding-bottom: 12px; color: var(--fg-3); font-size: 13px; line-height: 1.5; white-space: nowrap; font-variant-numeric: tabular-nums; }
.src-list { display: grid; }
.src-row { display: grid; grid-template-columns: minmax(0,210px) minmax(0,1fr); gap: 28px; padding: 24px 0; border-bottom: 1px solid var(--line-2); }
.src-name { color: var(--fg-1); font: 600 16px/1.45 var(--font-body); }
.src-full { display: block; margin-top: 6px; color: var(--fg-3); font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.src-detail { color: var(--fg-2); font-size: 15px; line-height: 1.7; overflow-wrap: anywhere; }
.source-empty { padding: 24px 0; color: var(--fg-3); }
.repro { margin: 24px 0 0; color: var(--fg-3); font-size: 14px; line-height: 1.65; }
.cite { padding: 24px; background: var(--bg-2); border: 1px solid var(--line-3); border-radius: 6px; }
.cov-h { color: var(--clean); font: 600 12px/1.5 var(--font-body); letter-spacing: .06em; text-transform: uppercase; }
.cite code { display: block; margin-top: 12px; color: var(--fg-1); font: 400 14px/1.75 var(--font-body); white-space: pre-wrap; overflow-wrap: anywhere; }
.hub-actions { margin-top: 24px; }
.back-link { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; color: var(--fg-2); font-size: 14px; text-decoration: none; }
.back-link::before { content: '\2190'; }
.back-link:hover { color: var(--clean); }
.hub-foot { display: flex; justify-content: space-between; gap: 16px 32px; flex-wrap: wrap; padding-block: 28px; border-top: 1px solid var(--line-2); color: var(--fg-3); font-size: 12px; line-height: 1.6; }
@media (max-width: 1100px) {
  .hub-main { grid-template-columns: 168px minmax(0,1fr); gap: 28px; }
  .cards { grid-template-columns: 1fr; }
  .mcard { display: grid; grid-template-columns: minmax(0,180px) minmax(0,1fr); gap: 24px; }
  .src-row { grid-template-columns: minmax(0,170px) minmax(0,1fr); gap: 24px; }
}
@media (max-width: 900px) {
  html { scroll-padding-top: calc(var(--methods-nav-height,72px) + 20px); }
  .hub-hero { gap: 12px 28px; }
  .hub-main { display: block; padding-top: 0; }
  .hub-index { top: 0; z-index: 30; margin-bottom: 32px; padding: 8px 0; background: var(--bg-1); border-bottom: 1px solid var(--line-3); }
  .hub-index-title { display: none; }
  .hub-index nav { grid-template-columns: repeat(4,minmax(0,1fr)); gap: 4px; }
  .hub-index a { align-items: center; padding: 10px 8px; font-size: 13px; border-left: 0; border-bottom: 2px solid transparent; }
  .hub-index a[aria-current] { background: var(--clean-soft); }
  .index-num { display: none; }
}
@media (max-width: 600px) {
  .wrap { padding-inline: 20px; }
  .hub-hero { grid-template-columns: 1fr; padding-block: 20px 32px; gap: 12px; }
  .kicker-row { gap: 12px; margin-bottom: 16px; }
  .kicker-tag { font-size: 11px; letter-spacing: .06em; }
  .lang-btn { min-height: 44px; }
  h1 { font-size: 38px; max-width: 17ch; }
  .subtitle { font-size: 16px; }
  .hub-index { margin-inline: -20px; padding-inline: 12px; }
  .hub-index a { font-size: 12px; line-height: 1.4; min-height: 60px; padding-inline: 8px; }
  .hub-sec { padding-bottom: 40px; }
  .sec-label { display: block; margin-bottom: 20px; padding-bottom: 14px; }
  .sec-label h2 { font-size: 21px; }
  .sec-label .meta { display: block; margin-top: 8px; }
  .framework, .mcard, .cite { padding: 20px; }
  .fw-name { font-size: 24px; }
  .fw-actions { display: grid; grid-template-columns: 1fr; }
  .fw-note { margin-top: 20px; }
  .mcard { display: flex; gap: 12px; }
  .src-row { grid-template-columns: minmax(0,1fr); gap: 10px; }
  .source-tools { gap: 12px; }
  .source-search input { font-size: 16px; }
  .source-count { font-size: 12px; }
  .hub-foot { gap: 12px; }
}