/* ============================================================
   DeltaForm — shared styles for the static content pages
   (/strategies, /strategies/*, /backtesting).

   Everything here is token-only: colours, type, spacing and motion
   all come from ds/tokens/*.css via ds/styles.css. The rules for the
   pill nav, buttons, badge and footer are lifted from site/index.html
   so these pages read as the same site. Nothing here depends on GSAP:
   the content pages ship three small scripts of their own (payoff.js,
   nav.js, articles.js) and no framework.
   ============================================================ */

/* allow-keywords lets `block-size: auto` animate, which the card expand needs */
:root { color-scheme: dark; interpolate-size: allow-keywords; }
* { box-sizing: border-box; }
html, body { margin: 0; }
html { overflow-x: clip; }
body { background: var(--bg-page); color: var(--text-strong); font-family: var(--font-sans);
  letter-spacing: var(--tracking-normal); -webkit-font-smoothing: antialiased;
  line-height: var(--leading-normal); overflow-x: clip; }
/* `clip`, not `hidden`: overflow-x:hidden makes body a scroll container, which
   silently kills `position: sticky` on every descendant — it was stopping
   aside.side from sticking. `clip` contains the overflow without that. */
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; text-wrap: balance; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 48px; }
@media (max-width: 640px){ .wrap { padding: 0 22px; } }

.skip { position: absolute; left: -9999px; top: 0; z-index: 200; background: var(--surface-raised);
  color: var(--text-strong); padding: 10px 18px; border-radius: var(--radius-sm); }
.skip:focus { left: 18px; top: 18px; }

/* ---------- buttons ---------- */
.btn { font-family: var(--font-sans); font-weight: var(--w-medium); letter-spacing: var(--tracking-normal);
  border-radius: var(--radius-sm); border: none; cursor: pointer; white-space: nowrap;
  transition: background var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out); }
a.btn { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: none; }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--blue-wash); }
.btn-md { font-size: var(--text-base); padding: 11px 22px; }
.btn-sm { font-size: var(--text-sm); padding: 8px 18px; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-hover); }
.btn-ghost { background: transparent; color: var(--text-body);
  box-shadow: inset 0 0 0 1px var(--border-subtle); }
.btn-ghost:hover { color: var(--text-strong); box-shadow: inset 0 0 0 1px var(--border-strong); }
.cta-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
@media (max-width: 560px){ .cta-row { flex-direction: column; align-items: stretch; }
  .cta-row .btn { width: 100%; } }

.badge { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono);
  font-size: var(--text-xs); letter-spacing: var(--tracking-label); text-transform: uppercase;
  color: var(--blue-bright); background: var(--blue-wash); border: 1px solid rgba(47,112,236,0.35);
  border-radius: var(--radius-pill); padding: 6px 14px; }
.badge i { width: 6px; height: 6px; border-radius: 50%; background: var(--blue); font-style: normal; }

/* ---------- floating pill nav ----------
   Matches site/index.html. The pill holds only anchors into THIS page and its
   indicator slides with scroll (ds/nav.js). Links to other pages live in the
   "Articles" dropdown below, which the indicator never touches. */
.navbar { position: fixed; top: 18px; left: 0; right: 0; z-index: 90; display: flex;
  justify-content: center; pointer-events: none; }
.pill { pointer-events: auto; display: flex; align-items: center; gap: 4px;
  background: rgba(13,20,32,0.72); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill); padding: 6px;
  backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 0 12px 40px rgba(0,0,0,0.45); }
.pill .mark { display: grid; place-items: center; width: 34px; height: 34px;
  border-radius: 50%; background: var(--surface-raised); margin-right: 2px; }
.pill .links { position: relative; display: flex; align-items: center; }
.pill .links a { position: relative; z-index: 1; font-size: var(--text-sm); color: var(--text-muted);
  padding: 8px 16px; border-radius: var(--radius-pill);
  transition: color var(--dur-fast) var(--ease-out); }
.pill .links a:hover { color: var(--text-body); }
.pill .links a.active { color: var(--text-strong); }
.pill .ind { position: absolute; top: 0; bottom: 0; left: 0; width: 0; z-index: 0;
  background: var(--surface-raised); border-radius: var(--radius-pill); opacity: 0; }
.pill .cta { margin-left: 2px; border-radius: var(--radius-pill); }
/* same responsive rules as the home page */
@media (max-width: 940px){ .pill .links a { padding: 8px 12px; } }
@media (max-width: 860px){ .pill .links a[href="#faq"] { display: none; } }
@media (max-width: 760px){ .pill .links a { padding: 8px 10px; font-size: 12px; }
  .pill .links a[href="#why"] { display: none; } }
@media (max-width: 560px){ .pill .links { display: none; } .pill { gap: 8px; } }

/* ---------- "Articles" dropdown inside the pill ----------
   A <button>, not an <a>, and a sibling of .links rather than a child, so
   the scroll-spy can never select it. Panel matches the pill's own visual
   family. Stays visible at every width; only the section links collapse. */
.art { position: relative; display: inline-flex; margin-left: -4px; }
.art-btn { font-family: var(--font-sans); font-size: var(--text-sm);
  font-weight: var(--w-regular); letter-spacing: var(--tracking-normal);
  color: var(--text-muted); background: none; border: none; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
  padding: 8px 16px; border-radius: var(--radius-pill);
  transition: color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out); }
.art-btn:hover { color: var(--text-body); }
.art.is-open .art-btn { color: var(--text-strong); }
.art-btn:focus-visible { outline: none; color: var(--text-strong);
  box-shadow: 0 0 0 3px var(--blue-wash); }
.art-btn.is-current { color: var(--text-strong); background: var(--surface-raised); }
.art-caret { width: 0; height: 0; border-left: 4px solid transparent;
  border-right: 4px solid transparent; border-top: 5px solid currentColor;
  transition: transform var(--dur-base) var(--ease-out); }
.art.is-open .art-caret { transform: rotate(180deg); }

.art-pop { position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%);
  z-index: 5; min-width: 172px; display: flex; flex-direction: column; gap: 2px;
  background: rgba(13,20,32,0.94); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 6px;
  backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 0 16px 50px rgba(0,0,0,0.6); }
.art-pop[hidden] { display: none; }
/* the 10px gap is a dead zone for the pointer; bridge it so travelling
   from the word to the panel does not fire pointerleave */
.art-pop::before { content: ""; position: absolute; left: 0; right: 0; top: -12px; height: 12px; }
.art-pop a { display: block; font-size: var(--text-sm); color: var(--text-muted);
  padding: 9px 12px; border-radius: var(--radius-sm); white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out); }
.art-pop a:hover { color: var(--text-strong); background: var(--surface-inset); }
.art-pop a[aria-current="page"] { color: var(--text-strong); background: var(--surface-raised); }
.art-pop a:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--blue-wash); }

@media (max-width: 760px){ .art-btn { padding: 8px 10px; font-size: 12px; } }
@media (max-width: 560px){ .art { margin-left: 0; }
  .art-pop { left: auto; right: 0; transform: none; } }

/* ---------- page head ---------- */
.phead { position: relative; padding: 138px 0 0; }
.phead .grid-bg { position: absolute; inset: 0 0 auto 0; height: 620px; z-index: 0; pointer-events: none;
  background-image: linear-gradient(var(--navy-700) 1px, transparent 1px),
    linear-gradient(90deg, var(--navy-700) 1px, transparent 1px);
  background-size: 48px 48px; opacity: 0.14;
  -webkit-mask-image: radial-gradient(120% 80% at 50% 0%, #000 30%, transparent 100%);
  mask-image: radial-gradient(120% 80% at 50% 0%, #000 30%, transparent 100%); }
.phead .amb { position: absolute; top: -220px; left: 50%; transform: translateX(-50%);
  width: min(960px, 100vw); height: 620px; z-index: 0; pointer-events: none;
  background: radial-gradient(closest-side, rgba(47,112,236,0.16), transparent 70%); }
.phead .wrap { position: relative; z-index: 5; }

.crumb { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-label);
  text-transform: uppercase; color: var(--text-label); margin: 0 0 20px; }
.crumb ol { list-style: none; display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  margin: 0; padding: 0; }
.crumb li + li::before { content: "/"; margin-right: 8px; color: var(--navy-600); }
.crumb a { color: var(--text-muted); transition: color var(--dur-fast) var(--ease-out); }
.crumb a:hover, .crumb a:focus-visible { color: var(--blue-bright); }

.ph-h1 { font-family: var(--font-display); font-weight: var(--w-bold);
  font-size: clamp(38px, 5.4vw, 62px); line-height: 1.03; letter-spacing: -0.045em;
  margin: 0; max-width: 17ch; color: var(--ink-100); }
.ph-sub { font-size: clamp(16px, 1.7vw, 19px); line-height: 1.55; color: var(--text-muted);
  margin: 22px 0 0; max-width: 62ch; }
.ph-cta { margin-top: 30px; }
.ph-note { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-label);
  letter-spacing: 0.04em; margin: 14px 0 0; }

/* ---------- article body ---------- */
.body { position: relative; z-index: 5; padding: 68px 0 0; }
.body .wrap { display: grid; grid-template-columns: minmax(0, 1fr) 268px; gap: 64px;
  align-items: start; }
@media (max-width: 940px){ .body .wrap { grid-template-columns: 1fr; gap: 44px; } }

.prose { max-width: 72ch; }
.prose h2 { font-family: var(--font-display); font-weight: var(--w-semibold);
  font-size: clamp(23px, 2.6vw, 30px); line-height: 1.18; letter-spacing: var(--tracking-tight);
  color: var(--ink-100); margin: 52px 0 0; scroll-margin-top: 110px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: var(--text-lg); font-weight: var(--w-semibold); letter-spacing: var(--tracking-tight);
  color: var(--text-body); margin: 30px 0 0; }
.prose p { color: var(--text-muted); font-size: var(--text-md); line-height: var(--leading-relaxed);
  margin: 16px 0 0; }
.prose strong { color: var(--text-body); font-weight: var(--w-semibold); }
.prose a { color: var(--blue-bright); text-decoration: underline; text-underline-offset: 3px;
  text-decoration-color: rgba(76,139,255,0.4);
  transition: text-decoration-color var(--dur-fast) var(--ease-out); }
.prose a:hover, .prose a:focus-visible { text-decoration-color: var(--blue-bright); }
/* cards are blocks, not inline links — they opt out of the prose underline */
.prose a.card { color: inherit; text-decoration: none; }
.prose ul, .prose ol { color: var(--text-muted); font-size: var(--text-md);
  line-height: var(--leading-relaxed); margin: 16px 0 0; padding-left: 22px; }
.prose li { margin: 8px 0 0; }
.prose li::marker { color: var(--text-label); }
.prose ol { counter-reset: step; list-style: none; padding-left: 0; }
.prose ol li { position: relative; counter-increment: step; padding-left: 44px; margin-top: 14px; }
.prose ol li::before { content: counter(step); position: absolute; left: 0; top: 1px;
  width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%;
  background: var(--blue-wash); border: 1px solid rgba(47,112,236,0.35);
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--blue-bright); }

/* numbers panel */
.numbers { margin: 24px 0 0; border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  background: var(--surface-card); overflow: hidden; }
.numbers .nrow { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 16px;
  padding: 13px 20px; border-top: 1px solid var(--navy-700); align-items: baseline; }
.numbers .nrow:first-child { border-top: none; }
.numbers dt { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase;
  letter-spacing: var(--tracking-label); color: var(--text-label); margin: 0; }
.numbers dd { margin: 0; font-size: var(--text-base); color: var(--text-body);
  font-variant-numeric: tabular-nums; }
.numbers dd b { font-family: var(--font-mono); font-weight: var(--w-medium); color: var(--ink-100); }
@media (max-width: 560px){ .numbers .nrow { grid-template-columns: 1fr; gap: 4px; } }

/* callout */
.note { margin: 26px 0 0; padding: 18px 22px; border-radius: var(--radius-md);
  background: var(--bg-well); border-left: 2px solid var(--blue); }
.note p { margin: 0; font-size: var(--text-base); color: var(--text-muted); }
.note p + p { margin-top: 10px; }

/* FAQ */
.faq-list { margin: 20px 0 0; border-top: 1px solid var(--border-subtle); }
.faq-list details { border-bottom: 1px solid var(--border-subtle); }
.faq-list summary { list-style: none; cursor: pointer; display: flex; align-items: flex-start;
  justify-content: space-between; gap: 20px; padding: 18px 0; font-size: var(--text-md);
  color: var(--text-body); font-weight: var(--w-medium); letter-spacing: var(--tracking-tight); }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary:hover { color: var(--text-strong); }
.faq-list summary:focus-visible { outline: none; color: var(--blue-bright); }
.faq-list .x { position: relative; flex: 0 0 auto; width: 12px; height: 12px; margin-top: 7px; }
.faq-list .x::before, .faq-list .x::after { content: ""; position: absolute; background: var(--text-label);
  transition: transform var(--dur-base) var(--ease-out); }
.faq-list .x::before { left: 0; right: 0; top: 5px; height: 2px; }
.faq-list .x::after { top: 0; bottom: 0; left: 5px; width: 2px; }
.faq-list details[open] .x::after { transform: scaleY(0); }
.faq-list .a { padding: 0 0 20px; max-width: 68ch; }
.faq-list .a p { margin: 0; font-size: var(--text-base); color: var(--text-muted);
  line-height: var(--leading-relaxed); }
.faq-list .a p + p { margin-top: 12px; }

/* ---------- sidebar ---------- */
.side { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 18px; }
@media (max-width: 940px){ .side { position: static; } }
.side-card { border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  background: var(--surface-card); padding: 22px; }
.side-card h2 { font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: var(--tracking-label); color: var(--text-label);
  font-weight: var(--w-medium); margin: 0 0 14px; }
.side-card p { margin: 0 0 16px; font-size: var(--text-sm); color: var(--text-muted);
  line-height: var(--leading-relaxed); }
.side-card .btn { width: 100%; }
.side-links { list-style: none; margin: 0; padding: 0; }
.side-links li + li { margin-top: 2px; }
.side-links a { display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  padding: 9px 10px; margin: 0 -10px; border-radius: var(--radius-sm); font-size: var(--text-base);
  color: var(--text-muted); transition: color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out); }
.side-links a:hover, .side-links a:focus-visible { color: var(--text-strong);
  background: var(--surface-inset); }
.side-links a span { font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--text-label); letter-spacing: 0.04em; }

/* ---------- payoff diagrams (drawn by ds/payoff.js) ----------
   Hidden until the script adds .is-drawn, so a JS-off visit shows nothing
   rather than an empty frame. Never hide these with `display:none` on the
   figure itself before that — the script needs the element in the DOM to
   read the colour tokens off it. */
.payoff { display: none; margin: 0 0 34px; }
.payoff.is-drawn { display: block; }
.payoff svg { display: block; width: 100%; height: auto; aspect-ratio: 320 / 150;
  border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  background: var(--surface-card); }
/* axis labels are HTML so they keep the mono token and one size at every width */
.pf-plot { display: flex; align-items: stretch; gap: 10px; }
.pf-plot svg { flex: 1 1 auto; min-width: 0; }
.pf-y { flex: 0 0 auto; display: grid; place-items: center; writing-mode: vertical-rl;
  transform: rotate(180deg); font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--text-label); }
.pf-x { margin-top: 8px; padding-left: 26px; text-align: center; font-family: var(--font-mono);
  font-size: var(--text-xs); letter-spacing: var(--tracking-label); text-transform: uppercase;
  color: var(--text-label); }
.payoff figcaption { margin: 10px 0 0; font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: 0.04em; color: var(--text-label); }
.payoff.is-approx figcaption::after { content: " Approximate — the shape depends on volatility."; }

.payoff-thumb { margin: 0 0 16px; }
.payoff-thumb svg { aspect-ratio: 320 / 130; border-radius: var(--radius-md);
  background: var(--surface-inset); }

/* ---------- strategy index grid ---------- */
.group { padding: 58px 0 0; scroll-margin-top: 110px; }
.group-head { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap;
  border-bottom: 1px solid var(--border-subtle); padding-bottom: 14px; }
.group-head h2 { font-family: var(--font-display); font-weight: var(--w-semibold);
  font-size: var(--text-xl); letter-spacing: var(--tracking-tight); color: var(--ink-100); }
.group-head p { margin: 0; font-size: var(--text-sm); color: var(--text-label); }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 22px; }
@media (max-width: 940px){ .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px){ .cards { grid-template-columns: 1fr; } }
.card { display: block; border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  background: var(--surface-card); padding: 22px;
  transition: border-color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out); }
.card:hover, .card:focus-visible { border-color: var(--border-strong); background: var(--surface-inset);
  transform: translateY(-2px); outline: none; }
.card h3 { font-size: var(--text-lg); font-weight: var(--w-semibold); color: var(--ink-100);
  letter-spacing: var(--tracking-tight); margin: 0; }
.card p { margin: 10px 0 0; font-size: var(--text-sm); color: var(--text-muted);
  line-height: var(--leading-relaxed); }
.card .tag { display: inline-block; margin-top: 14px; font-family: var(--font-mono);
  font-size: var(--text-xs); letter-spacing: var(--tracking-label); text-transform: uppercase;
  color: var(--text-label); }
a.card:hover .tag { color: var(--blue-bright); }

/* index cards: a <div>, not an <a>, so the <details> below is valid markup.
   The heading link stays a plain <a href> — that is the crawlable link. */
.card-idx { display: flex; flex-direction: column; }
.card-idx:hover { transform: none; }
.card-idx h3 a { color: var(--ink-100); text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out); }
.card-idx:hover h3 a, .card-idx h3 a:focus-visible { color: var(--blue-bright); }
.card-idx h3 a::after { content: ""; position: absolute; inset: 0; }
.card-idx { position: relative; }
.card-idx > .tag { margin-top: auto; padding-top: 14px; }

/* the expand control sits above the title's overlay so it stays clickable */
.card-more { position: relative; z-index: 1; margin-top: 16px;
  border-top: 1px solid var(--navy-700); }
.card-more summary { list-style: none; cursor: pointer; display: flex; align-items: center;
  justify-content: space-between; gap: 12px; padding: 12px 0 0;
  font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase;
  letter-spacing: var(--tracking-label); color: var(--text-muted);
  transition: color var(--dur-fast) var(--ease-out); }
.card-more summary::-webkit-details-marker { display: none; }
.card-more summary:hover { color: var(--text-strong); }
.card-more summary:focus-visible { outline: none; color: var(--blue-bright);
  box-shadow: 0 0 0 3px var(--blue-wash); border-radius: var(--radius-xs); }
.card-more summary .x { position: relative; flex: 0 0 auto; width: 10px; height: 10px; }
.card-more summary .x::before, .card-more summary .x::after { content: ""; position: absolute;
  background: currentColor; transition: transform var(--dur-base) var(--ease-out); }
.card-more summary .x::before { left: 0; right: 0; top: 4px; height: 2px; }
.card-more summary .x::after { top: 0; bottom: 0; left: 4px; width: 2px; }
.card-more[open] summary .x::after { transform: scaleY(0); }
.card-more-body { padding: 12px 0 14px; }
.card-more-body p { margin: 0; font-size: var(--text-sm); color: var(--text-muted);
  line-height: var(--leading-relaxed); }
.card-more-body .tag { display: block; margin: 12px 0 0; font-family: var(--font-mono);
  font-size: var(--text-xs); letter-spacing: var(--tracking-label); text-transform: uppercase;
  color: var(--text-label); }
.card-more-body .more-link { display: inline-block; margin-top: 12px; font-size: var(--text-sm);
  color: var(--blue-bright); text-decoration: underline; text-underline-offset: 3px;
  text-decoration-color: rgba(76,139,255,0.4); }
.card-more-body .more-link:hover { text-decoration-color: var(--blue-bright); }

/* Slide-down. `::details-content` is what makes a native <details> animate;
   where it is unsupported the panel simply snaps open, which is still correct
   and still keyboard-accessible. */
.card-more::details-content { block-size: 0; overflow: hidden;
  transition: block-size var(--dur-slow) var(--ease-out), content-visibility var(--dur-slow) allow-discrete; }
.card-more[open]::details-content { block-size: auto; }

/* ---------- related + final CTA ---------- */
.related { margin: 56px 0 0; padding-top: 30px; border-top: 1px solid var(--border-subtle);
  scroll-margin-top: 110px; }
.related h2 { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase;
  letter-spacing: var(--tracking-label); color: var(--text-label); font-weight: var(--w-medium);
  margin: 0 0 16px; }
.related .cards { margin-top: 0; }

.final { padding: 96px 0 104px; }
.final-inner { border: 1px solid var(--border-subtle); border-radius: var(--radius-xl);
  background: var(--bg-well); padding: 48px; text-align: center; }
@media (max-width: 640px){ .final-inner { padding: 34px 24px; } }
.final h2 { font-family: var(--font-display); font-weight: var(--w-bold);
  font-size: clamp(28px, 3.4vw, 40px); letter-spacing: -0.04em; color: var(--ink-100); }
.final p { color: var(--text-muted); font-size: var(--text-md); margin: 14px auto 28px; max-width: 56ch; }
.final .cta-row { justify-content: center; }

/* ---------- footer (matches index.html) ---------- */
footer { border-top: 1px solid var(--border-subtle); position: relative; z-index: 5; }
.foot { display: flex; align-items: center; justify-content: space-between; gap: 16px;
  flex-wrap: wrap; padding: 32px 0 20px; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; font-weight: var(--w-bold);
  letter-spacing: -0.045em; color: var(--text-strong); }
.foot .muted { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-label);
  letter-spacing: 0.04em; }
.foot .muted a { color: var(--text-body); }
.foot .muted a:hover { color: var(--blue-bright); }
.foot-links { display: flex; flex-wrap: wrap; gap: 20px; padding-bottom: 24px;
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.04em; }
.foot-links a { color: var(--text-muted); transition: color var(--dur-fast) var(--ease-out); }
.foot-links a:hover, .foot-links a:focus-visible { color: var(--blue-bright); }
.disclaimer { color: var(--text-label); font-size: var(--text-xs); line-height: var(--leading-relaxed);
  max-width: 82ch; padding-bottom: 48px; }

@media (prefers-reduced-motion: reduce){
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .btn:hover, .card:hover { transform: none; }
}