/* ==========================================================================
   SCIF Answers (/scif-answers.php)  ·  prefixes: ans- (app), kb- (sections), gl- (glossary), lib- (library)
   Requires core.css (tokens + base).
   ========================================================================== */

.page-answers { --rail-w: 300px; --content-max: 960px; --search-h: 104px; }
.page-answers .site-footer { margin-top: 0; }

.ans-app {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  max-width: 1440px;
  margin-inline: auto;
  min-height: calc(100vh - var(--nav-h));
}

/* ---------------------------------------------------------------- rail */
.ans-rail {
  position: sticky; top: var(--nav-h);
  display: flex; flex-direction: column;
  height: calc(100vh - var(--nav-h));
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(11, 18, 27, .72), rgba(7, 12, 19, .55));
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
}
.ans-brand { padding: 1.5rem 1.4rem 1.1rem; border-bottom: 1px solid var(--line-2); }
.ans-brand__title {
  display: inline-block; color: var(--ink); text-decoration: none;
  font-family: var(--font-display); font-size: 1.95rem; font-weight: 700; line-height: 1; letter-spacing: .005em;
}
.ans-brand__title:hover { color: var(--ink); }
.ans-hz { height: 6px; margin: .8rem 0 .85rem; border-radius: 1px; background: repeating-linear-gradient(135deg, var(--amber) 0 8px, transparent 8px 16px); opacity: .9; }
.ans-brand__desc { font-size: .8125rem; line-height: 1.5; color: var(--ink-3); }

.ans-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-bottom: 1px solid var(--line-2); }
.ans-stat { display: flex; flex-direction: column-reverse; gap: .3rem; padding: .85rem .6rem .85rem 1.4rem; }
.ans-stat + .ans-stat { padding-left: .9rem; border-left: 1px solid var(--line-2); }
.ans-stat dd { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; line-height: 1; color: var(--cyan); font-variant-numeric: tabular-nums; }
.ans-stat dd.is-empty { color: var(--ink-4); }
.ans-stat dt { font-family: var(--font-mono); font-size: .5625rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); line-height: 1.2; }

.ans-railtoggle { display: none; }
.ans-railnav { flex: 1; overflow-y: auto; padding: .6rem .7rem 2rem; scrollbar-width: thin; scrollbar-color: var(--surface-3) transparent; overscroll-behavior: contain; }
.ans-navlabel { padding: .9rem .7rem .45rem; font-family: var(--font-mono); font-size: .625rem; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); }
.ans-navlist { display: grid; gap: 1px; }
.ans-navitem {
  position: relative;
  display: grid; grid-template-columns: 1.9rem minmax(0, 1fr) auto; align-items: baseline; gap: .45rem;
  padding: .45rem .6rem .45rem .7rem; border-radius: 9px;
  color: var(--ink-2); font-size: .84375rem; line-height: 1.35; text-decoration: none;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.ans-navitem:hover { background: var(--surface-2); color: var(--ink); }
.ans-navitem__num { font-family: var(--font-mono); font-size: .6875rem; color: var(--ink-3); }
.ans-navitem--ref .ans-navitem__num { font-size: .5625rem; letter-spacing: .04em; color: var(--violet); opacity: .8; }
.ans-navitem__n { min-width: 1.7rem; padding: .05rem .35rem; border-radius: 5px; background: var(--surface-2); text-align: center; font-family: var(--font-mono); font-size: .65625rem; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.ans-navitem[aria-current="page"] { background: var(--cyan-soft); color: var(--ink); font-weight: 600; }
.ans-navitem[aria-current="page"]::before { content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 2px; border-radius: 2px; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.ans-navitem[aria-current="page"] .ans-navitem__num { color: var(--cyan); }
.ans-navitem[aria-current="page"] .ans-navitem__n { background: rgba(63, 208, 255, .18); color: var(--cyan); }

/* ---------------------------------------------------------------- main + search */
.ans-main { min-width: 0; display: flex; flex-direction: column; }
.ans-main:focus { outline: none; }
.ans-searchbar {
  position: sticky; top: var(--nav-h); z-index: 20;
  padding: 1rem clamp(1rem, 3vw, 2.5rem) .7rem;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 8, 13, .82);
  -webkit-backdrop-filter: blur(14px) saturate(130%); backdrop-filter: blur(14px) saturate(130%);
}
.ans-search { display: flex; align-items: center; gap: .6rem; max-width: var(--content-max); }
.ans-qbox { position: relative; flex: 1; min-width: 0; }
.ans-qbox > .icon { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--cyan); pointer-events: none; }
.ans-qbox input {
  width: 100%; height: 52px; padding: 0 3rem 0 2.9rem;
  border: 1px solid var(--glass-border); border-radius: 14px;
  background: var(--surface); color: var(--ink);
  font-size: 1rem; box-shadow: var(--shadow);
  -webkit-appearance: none; appearance: none;
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t) var(--ease), background var(--t-fast) var(--ease);
}
.ans-qbox input::placeholder { color: var(--ink-3); }
.ans-qbox input:hover { border-color: var(--line); }
.ans-qbox input:focus { outline: none; border-color: rgba(63, 208, 255, .6); background: var(--surface-2); box-shadow: var(--glow-cyan); }
.ans-qbox input::-webkit-search-cancel-button { -webkit-appearance: none; appearance: none; width: 16px; height: 16px; cursor: pointer;
  background: linear-gradient(45deg, transparent 45%, var(--ink-3) 45%, var(--ink-3) 55%, transparent 55%), linear-gradient(-45deg, transparent 45%, var(--ink-3) 45%, var(--ink-3) 55%, transparent 55%); }
.ans-kbd { position: absolute; right: .9rem; top: 50%; transform: translateY(-50%); pointer-events: none; }
.ans-qbox input:focus ~ .ans-kbd, .ans-qbox input:not(:placeholder-shown) ~ .ans-kbd { opacity: 0; }
.ans-search .btn { --btn-h: 52px; border-radius: 14px; }
.js .ans-search__go { display: none; }
.ans-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem .8rem; min-height: 1.25rem; max-width: var(--content-max); margin-top: .55rem; font-family: var(--font-mono); font-size: .75rem; letter-spacing: .02em; color: var(--ink-3); }
.ans-meta__clear, .ans-meta button { padding: 0; border: 0; background: none; color: var(--cyan); font: inherit; text-decoration: underline; text-underline-offset: .2em; cursor: pointer; }
.ans-meta b { color: var(--ink); font-weight: 500; }
.ans-meta:empty { min-height: 0; margin-top: 0; }

.ans-content { width: 100%; max-width: calc(var(--content-max) + 5rem); padding: clamp(1.25rem, 2.4vw, 2rem) clamp(1rem, 3vw, 2.5rem) clamp(3rem, 8vw, 5rem); }
.ans-content > * { max-width: var(--content-max); }

/* ---------------------------------------------------------------- home */
.ans-hero { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 17.5rem; gap: 1.5rem 2.25rem; align-items: end; padding: .25rem 0 0; }
.ans-legend {
  position: relative; padding: 1.05rem 1.1rem 1rem;
  border: 1px solid var(--glass-border); border-radius: var(--r);
  background: linear-gradient(180deg, var(--glass), rgba(7, 12, 19, .7));
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
}
.ans-legend::before { content: ""; position: absolute; right: 10px; top: 10px; width: 12px; height: 12px; border-right: 1px solid var(--cyan); border-top: 1px solid var(--cyan); opacity: .5; border-top-right-radius: 4px; }
.ans-legend__h { margin-bottom: .75rem; font-family: var(--font-mono); font-size: .625rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); }
.ans-legend__list { display: grid; gap: .7rem; }
.ans-legend__list li { display: grid; gap: .1rem; padding-left: .7rem; border-left: 2px solid var(--co); font-size: .8125rem; line-height: 1.45; color: var(--ink-3); }
.ans-legend__list .co-label { margin: 0; font-size: .625rem; }
.ans-legend__foot { margin-top: .9rem; padding-top: .75rem; border-top: 1px dashed var(--line); font-size: .78125rem; color: var(--ink-3); }
@media (max-width: 1240px) {
  .ans-hero { grid-template-columns: minmax(0, 1fr); }
  .ans-legend { display: none; }
}
.ans-hero__title { margin: .8rem 0 1rem; font-size: clamp(2.2rem, 1.4rem + 3vw, 3.6rem); max-width: 16ch; }
.ans-hero .lede { max-width: 64ch; }
.ans-block { margin-top: clamp(2rem, 4vw, 2.75rem); }
.ans-sect-h {
  display: flex; align-items: center; gap: .8rem; margin-bottom: 1rem;
  font-family: var(--font-mono); font-size: .75rem; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3);
}
.ans-sect-h::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--line), transparent); }
.ans-block .chips { gap: .55rem; }
.ans-block .chip { font-size: .90625rem; }

.ans-modgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: .75rem; }
.ans-modcard {
  position: relative; display: flex; flex-direction: column; height: 100%;
  padding: 1rem 1.1rem 1rem; border: 1px solid var(--glass-border); border-radius: var(--r);
  background: linear-gradient(180deg, var(--glass), rgba(7, 12, 19, .6));
  color: var(--ink); text-decoration: none; overflow: hidden;
  transition: border-color var(--t-fast) var(--ease), transform var(--t) var(--ease), box-shadow var(--t) var(--ease), background var(--t) var(--ease);
}
.ans-modcard::after { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan), transparent); opacity: 0; transition: opacity var(--t) var(--ease); }
.ans-modcard:hover { color: var(--ink); border-color: rgba(63, 208, 255, .35); background: linear-gradient(180deg, var(--surface-2), var(--surface)); transform: translateY(-2px); box-shadow: 0 18px 40px -24px rgba(63, 208, 255, .45); }
.ans-modcard:hover::after { opacity: .8; }
.ans-modcard__num { font-family: var(--font-mono); font-size: .75rem; color: var(--amber); letter-spacing: .06em; }
.ans-modcard__t { margin-top: .35rem; font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; line-height: 1.15; }
.ans-modcard__s { margin-top: .45rem; font-size: .84375rem; line-height: 1.5; color: var(--ink-3); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.ans-modcard__foot { display: flex; align-items: center; gap: .4rem; margin-top: auto; padding-top: .85rem; font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.ans-modcard__foot .icon { margin-left: auto; color: var(--cyan); transition: transform var(--t) var(--ease); }
.ans-modcard:hover .ans-modcard__foot .icon { transform: translateX(3px); }
.ans-modcard--ref .ans-modcard__num { color: var(--violet); }
.ans-modgrid--compact { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); margin-top: 1.25rem; }
.ans-modgrid--compact .ans-modcard__t { font-size: 1.05rem; }
.ans-foot { margin-top: clamp(2.5rem, 5vw, 3.5rem); padding-top: 1.1rem; border-top: 1px solid var(--line-2); font-size: .8125rem; color: var(--ink-3); }

/* ---------------------------------------------------------------- result cards */
.ans-results { display: grid; grid-template-columns: minmax(0, 1fr); gap: .75rem; }
.ans-results > li { min-width: 0; }
.ans-card {
  position: relative; overflow: hidden;
  border: 1px solid var(--glass-border); border-radius: var(--r);
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t) var(--ease);
  animation: ans-in var(--t) var(--ease) both;
}
@keyframes ans-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.ans-card:hover { border-color: var(--line); }
.ans-card.is-open { border-color: rgba(63, 208, 255, .3); box-shadow: var(--shadow), 0 0 0 1px rgba(63, 208, 255, .08); }
.ans-card.is-open::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
.ans-card__h { margin: 0; font: inherit; }
.ans-card__btn, .ans-card__static { display: block; width: 100%; padding: 1rem 1.15rem 1.05rem; border: 0; background: none; color: var(--ink); text-align: left; }
.ans-card__btn { cursor: pointer; transition: background var(--t-fast) var(--ease); }
.ans-card__btn:hover { background: rgba(120, 180, 220, .04); }
.ans-card__btn:focus-visible { outline: 2px solid var(--amber); outline-offset: -2px; border-radius: var(--r); }
.ans-card__tags { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin-bottom: .45rem; }
.ans-card__tags .tag--violet { background: var(--violet-soft); color: var(--violet); }
.ans-score { display: inline-flex; align-items: center; gap: .45rem; margin-left: auto; font-family: var(--font-mono); font-size: .625rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.ans-score i { display: block; width: 44px; height: 4px; overflow: hidden; border-radius: 2px; background: var(--surface-3); }
.ans-score b { display: block; height: 100%; border-radius: 2px; background: linear-gradient(90deg, var(--amber), #FFD08A); box-shadow: 0 0 8px rgba(255, 181, 71, .5); }
.ans-card__title { display: block; font-family: var(--font-body); font-size: 1.0625rem; font-weight: 600; line-height: 1.35; color: var(--ink); letter-spacing: 0; text-wrap: balance; }
.ans-card__title a { color: inherit; text-decoration: none; }
.ans-card__title a:hover { color: var(--cyan); }
.ans-card__snip { display: block; margin-top: .4rem; font-size: .875rem; line-height: 1.6; color: var(--ink-3); }
.ans-card__snip mark, .ans-card__title mark { background: var(--amber-soft); color: var(--amber); }
.ans-card__chev { position: absolute; right: 1rem; bottom: 1rem; color: var(--ink-4); transition: transform var(--t) var(--ease), color var(--t-fast) var(--ease); }
.ans-card__btn[aria-expanded="true"] .ans-card__chev { transform: rotate(180deg); color: var(--cyan); }
.ans-card__btn .ans-card__snip { padding-right: 1.5rem; }
.ans-card__body { padding: .25rem 1.15rem 1.25rem; border-top: 1px solid var(--line-2); }
.ans-card__body > .prose { padding-top: 1rem; }
.ans-card__actions { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.1rem; padding-top: 1rem; border-top: 1px solid var(--line-2); }
.ans-card__actions .btn { --btn-h: 36px; padding: 0 .9rem; font-size: .8125rem; }
.ans-loading { display: flex; align-items: center; gap: .6rem; padding: 1rem 0; font-family: var(--font-mono); font-size: .75rem; color: var(--ink-3); }
.ans-loading::before { content: ""; width: 14px; height: 14px; border: 2px solid var(--line); border-top-color: var(--cyan); border-radius: 50%; animation: ans-spin .8s linear infinite; }
@keyframes ans-spin { to { transform: rotate(360deg); } }

.ans-empty { padding: clamp(1.25rem, 3vw, 2rem); border: 1px dashed var(--line); border-radius: var(--r-lg); background: var(--glass); color: var(--ink-2); }
.ans-empty b { display: block; margin-bottom: .5rem; font-family: var(--font-display); font-size: 1.5rem; font-weight: 600; color: var(--ink); line-height: 1.15; }
.ans-empty p + p { margin-top: .6rem; }
.ans-empty--lg .eyebrow { margin-bottom: .75rem; color: var(--amber); }

/* ---------------------------------------------------------------- module view */
.ans-crumbs { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-4); }
.ans-crumbs a { color: var(--ink-3); text-decoration: none; }
.ans-crumbs a:hover { color: var(--cyan); }
.ans-modhead { position: relative; margin-bottom: clamp(1.5rem, 3vw, 2.25rem); }
.ans-modhead__title { margin: .7rem 0 .8rem; font-size: clamp(2.1rem, 1.4rem + 2.6vw, 3.25rem); max-width: 20ch; }
.ans-modhead .lede { max-width: 62ch; }

.ans-toc { margin-top: 1.5rem; border: 1px solid var(--glass-border); border-radius: var(--r); background: var(--glass); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
.ans-toc > summary {
  display: flex; align-items: center; gap: .6rem; padding: .85rem 1.1rem; cursor: pointer; list-style: none;
  font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-2);
}
.ans-toc > summary::-webkit-details-marker { display: none; }
.ans-toc > summary::after { content: ""; width: 7px; height: 7px; margin-left: auto; border-right: 1.5px solid var(--ink-3); border-bottom: 1.5px solid var(--ink-3); transform: rotate(45deg) translateY(-2px); transition: transform var(--t-fast) var(--ease); }
.ans-toc[open] > summary::after { transform: rotate(-135deg) translateY(-2px); }
.ans-toc__list { columns: 2 280px; column-gap: 1.5rem; padding: 0 1.1rem 1rem; }
.ans-toc__list li { break-inside: avoid; }
.ans-toc__list a { display: flex; gap: .6rem; padding: .3rem 0; color: var(--ink-2); font-size: .875rem; line-height: 1.4; text-decoration: none; }
.ans-toc__list a:hover { color: var(--cyan); }
.ans-toc__n { flex: none; min-width: 2.6rem; font-family: var(--font-mono); font-size: .6875rem; color: var(--ink-4); padding-top: .12em; }
.ans-toc--inline { padding-top: 1rem; }
.ans-toc--inline .ans-toc__n { min-width: 0; margin-left: .3rem; }

.kb-sec {
  position: relative; margin-top: clamp(1rem, 2vw, 1.25rem);
  padding: clamp(1.15rem, 3vw, 2rem) clamp(1.1rem, 3vw, 2.1rem) clamp(1.25rem, 3vw, 1.9rem);
  border: 1px solid var(--glass-border); border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(11, 18, 27, .78), rgba(7, 12, 19, .62));
  box-shadow: var(--shadow);
  scroll-margin-top: calc(var(--search-h) + 4px); /* html scroll-padding already clears the nav */
}
.kb-sec::before {
  content: ""; position: absolute; left: 10px; top: 10px; width: 12px; height: 12px; pointer-events: none;
  border-left: 1px solid var(--cyan); border-top: 1px solid var(--cyan); opacity: .45; border-top-left-radius: 4px;
}
.kb-sec.is-target { border-color: rgba(255, 181, 71, .55); box-shadow: var(--shadow), 0 0 0 1px rgba(255, 181, 71, .25), 0 0 40px -12px rgba(255, 181, 71, .45); transition: box-shadow 1.2s var(--ease), border-color 1.2s var(--ease); }
.kb-sec__head { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: start; gap: .35rem 1rem; margin-bottom: 1.15rem; }
.kb-sec__num { grid-column: 1 / -1; font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .12em; color: var(--amber); }
.kb-sec__title { font-size: clamp(1.45rem, 1.15rem + 1.1vw, 1.95rem); line-height: 1.12; }
.kb-sec__title a { color: var(--ink); text-decoration: none; }
.kb-sec__title a:hover { color: var(--cyan); }
.kb-copy {
  display: inline-flex; align-items: center; gap: .4rem; height: 32px; padding: 0 .7rem; margin-top: .1rem;
  border: 1px solid var(--line); border-radius: var(--r-pill); background: transparent; color: var(--ink-3);
  font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .06em; white-space: nowrap;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.kb-copy:hover { color: var(--ink); border-color: var(--glass-border); background: var(--surface-2); }
.kb-copy.is-copied { color: var(--green); border-color: rgba(61, 220, 151, .45); background: var(--green-soft); }
.kb-sec .prose > .src-line { margin-top: 1.4rem; }

.ans-pager { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-top: clamp(1.5rem, 4vw, 2.5rem); }
.ans-pager__link { display: grid; gap: .3rem; padding: 1rem 1.2rem; border: 1px solid var(--glass-border); border-radius: var(--r); background: var(--glass); color: var(--ink); text-decoration: none; transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease); }
.ans-pager__link:hover { color: var(--ink); border-color: rgba(63, 208, 255, .35); background: var(--surface-2); }
.ans-pager__link--next { text-align: right; }
.ans-pager__dir { display: inline-flex; align-items: center; gap: .4rem; font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .12em; text-transform: uppercase; color: var(--cyan); }
.ans-pager__link--next .ans-pager__dir { justify-content: flex-end; }
.ans-pager__t { font-family: var(--font-display); font-size: 1.2rem; font-weight: 600; line-height: 1.2; }

/* ---------------------------------------------------------------- glossary */
.ans-letters {
  position: sticky; top: calc(var(--nav-h) + var(--search-h)); z-index: 10;
  display: flex; flex-wrap: wrap; gap: 2px; margin-bottom: 1.25rem; padding: .5rem;
  border: 1px solid var(--glass-border); border-radius: var(--r); background: rgba(7, 12, 19, .9);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
}
.ans-letter {
  display: inline-grid; place-items: center; flex: none; min-width: 31px; height: 34px; padding: 0 .45rem;
  border: 1px solid transparent; border-radius: 8px; color: var(--ink-2); text-decoration: none;
  font-family: var(--font-mono); font-size: .8125rem; font-weight: 500;
}
a.ans-letter:hover { background: var(--surface-2); color: var(--ink); }
.ans-letter.is-on, .ans-letter[aria-pressed="true"] { border-color: rgba(63, 208, 255, .45); background: var(--cyan-soft); color: var(--cyan); }
.ans-letter.is-empty { color: var(--ink-4); opacity: .5; }
.gl-group { margin-top: 1.5rem; scroll-margin-top: calc(var(--search-h) + 64px); }
.gl-letter { display: flex; align-items: center; gap: .9rem; margin-bottom: .6rem; font-size: 2.2rem; color: var(--cyan); }
.gl-letter::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--line), transparent); }
.gl-list { display: grid; gap: .5rem; }
.gl-item { display: grid; grid-template-columns: minmax(180px, 16rem) minmax(0, 1fr); gap: .35rem 1.5rem; padding: .95rem 1.1rem; border: 1px solid var(--line-2); border-radius: var(--r); background: var(--glass); scroll-margin-top: calc(var(--search-h) + 72px); }
.gl-item:target { border-color: rgba(255, 181, 71, .55); box-shadow: 0 0 30px -12px rgba(255, 181, 71, .5); }
.gl-item dt { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; line-height: 1.25; color: var(--ink); }
.gl-abbr { display: inline-block; margin-left: .25rem; padding: .05rem .4rem; border-radius: 5px; background: var(--amber-soft); color: var(--amber); font-family: var(--font-mono); font-size: .6875rem; font-weight: 500; letter-spacing: .06em; text-decoration: none; vertical-align: middle; }
.gl-item dd .prose p { margin: 0; }
.gl-exp { display: block; margin-top: .15rem; font-family: var(--font-body); font-size: .8125rem; font-weight: 400; color: var(--ink-3); }
.gl-src { margin-top: .75rem; }
.gl-src .src-line { border-top: 0; padding-top: .25rem; }
.gl-see { margin-top: .45rem; font-size: .8125rem; color: var(--ink-3); }
.gl-see span { margin-right: .4rem; font-family: var(--font-mono); font-size: .625rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-4); }
.gl-see a { color: var(--ink-2); }
.gl-see a:hover { color: var(--cyan); }

/* Wide tables scroll in their own box. JS gives the ones that actually overflow
   tabindex="0" + role=group so Safari/VoiceOver users can scroll them; keep the
   focus ring inside the box so it can never widen the page. */
.tablewrap[tabindex]:focus-visible { outline: 2px solid var(--amber); outline-offset: -2px; border-radius: var(--r); }

/* ---------------------------------------------------------------- library */
.lib-group .kb-sec__head { margin-bottom: .9rem; }
.lib-table { min-width: 720px !important; }
.lib-table tbody th { font-weight: 600; min-width: 12rem; }
.lib-src { margin-top: 1rem; }
.lib-ver { white-space: nowrap; font-family: var(--font-mono); font-size: .78125rem; color: var(--ink-2); }
.lib-open { display: inline-flex; align-items: center; gap: .3rem; padding: .25rem .6rem; border: 1px solid var(--line); border-radius: var(--r-pill); color: var(--cyan); font-size: .8125rem; text-decoration: none; white-space: nowrap; }
.lib-open:hover { border-color: var(--cyan); background: var(--cyan-soft); color: var(--ink); }

/* ---------------------------------------------------------------- index */
.ans-index__mod { margin-top: 1.75rem; }
.ans-index__num { color: var(--amber); }
.ans-index__list { columns: 2 300px; column-gap: 2rem; counter-reset: idx; }
.ans-index__list li { break-inside: avoid; counter-increment: idx; }
.ans-index__list a { display: flex; gap: .6rem; padding: .35rem 0; border-bottom: 1px solid var(--line-2); color: var(--ink-2); font-size: .90625rem; line-height: 1.4; text-decoration: none; }
.ans-index__list a::before { content: counter(idx, decimal-leading-zero); flex: none; font-family: var(--font-mono); font-size: .6875rem; color: var(--ink-4); padding-top: .15em; }
.ans-index__list a:hover { color: var(--cyan); }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 1100px) {
  .page-answers { --rail-w: 264px; }
}
@media (max-width: 900px) {
  .page-answers { --search-h: 84px; }
  .ans-app { grid-template-columns: minmax(0, 1fr); }
  .ans-rail { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .ans-brand { display: flex; align-items: center; gap: .9rem; padding: .85rem var(--gutter) 0; border-bottom: 0; }
  .ans-brand__title { flex: none; font-size: 1.5rem; }
  .ans-hz { flex: 1; height: 5px; margin: 0; }
  .ans-brand__desc { display: none; }
  .ans-stats { display: flex; flex-wrap: wrap; gap: .25rem 1.1rem; padding: .55rem var(--gutter) 0; border-bottom: 0; }
  .ans-stat, .ans-stat + .ans-stat { flex-direction: row-reverse; justify-content: flex-end; align-items: baseline; gap: .35rem; padding: 0; border: 0; }
  .ans-stat dd { font-size: 1.05rem; }
  .ans-stat dt { font-size: .59375rem; }
  .ans-railtoggle {
    display: flex; align-items: center; gap: .6rem; width: calc(100% - 2 * var(--gutter)); margin: .7rem var(--gutter) .8rem;
    min-height: 44px; padding: 0 1rem; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--ink);
    font-size: .9375rem; font-weight: 500;
  }
  .ans-railtoggle > .icon:first-child { color: var(--cyan); }
  .ans-railtoggle > .icon:last-child { margin-left: auto; color: var(--ink-3); transition: transform var(--t-fast) var(--ease); }
  .ans-railtoggle[aria-expanded="true"] > .icon:last-child { transform: rotate(180deg); }
  .no-js .ans-railtoggle { display: none; }
  .no-js .ans-searchbar { position: static; } /* the no-JS nav wraps taller, so don't pin under it */
  .no-js .ans-rail { order: 2; border-bottom: 0; border-top: 1px solid var(--line); } /* content first without JS */
  .ans-railnav { padding: 0 calc(var(--gutter) - .7rem) 1rem; }
  .js .ans-railnav:not(.is-open) { display: none; }
  /* Phones paint the "On this page" list collapsed from the first frame; the inline script at the
     end of the document then drops [data-toc-auto] and the real open/closed state takes over, with
     no layout movement either way. Without JS (no .js class) the list stays open. */
  .js .ans-toc[data-toc-auto] > .ans-toc__list { display: none; }
  .js .ans-toc[data-toc-auto][open] > summary::after { transform: rotate(45deg) translateY(-2px); }
  .ans-searchbar { top: var(--nav-h); padding: .7rem var(--gutter) .5rem; }
  .ans-qbox input { height: 48px; font-size: 1rem; }
  .ans-search .btn { --btn-h: 48px; }
  .ans-search__dir-t { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .ans-search__dir { width: 48px; padding: 0; }
  .ans-kbd { display: none; }
  .ans-content { padding: 1.25rem var(--gutter) 3rem; }
  .gl-item { grid-template-columns: 1fr; }
  .ans-letters { top: calc(var(--nav-h) + var(--search-h)); }
}
@media (max-width: 560px) {
  .ans-pager { grid-template-columns: 1fr; }
  .ans-pager__link--next { text-align: left; }
  .ans-pager__link--next .ans-pager__dir { justify-content: flex-start; }
  .kb-sec__head { grid-template-columns: 1fr; }
  .kb-copy { justify-self: start; }
  .ans-modgrid { grid-template-columns: 1fr; }
  .ans-score i { width: 32px; }
  .ans-hero__title { font-size: 2.2rem; }
  .kb-sec { border-radius: var(--r); }
  .ans-letters { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; margin-inline: calc(-1 * var(--gutter)); border-radius: 0; border-inline: 0; padding-inline: var(--gutter); }
  .ans-letters::-webkit-scrollbar { display: none; }
}

@media print {
  .ans-app { display: block; }
  .ans-rail, .ans-searchbar, .ans-pager, .ans-toc, .ans-letters, .kb-copy { display: none !important; }
  .kb-sec { border: 0; padding: 0; margin-top: 1.5rem; background: none; box-shadow: none; }
  .kb-sec::before { display: none; }
  .ans-card { animation: none; }
}