/**
 * Blade Boss: About (pass 27, D-296). Pairs with templates/about.php and assets/js/about.js.
 * On the P4 token contract: every color is a token, light and dark follow <html data-theme>. Same grammar as the
 * Scan, pricing and How it works: Montserrat 900 display, Open Sans body, Barlow Semi Condensed numbers, ghost words,
 * the orange action with --warm-fg text (R4). Every rule is scoped under .ab or .ab-layers.
 */

body.bb-page-about .bb-main { padding-top: 0; }
body.bb-page-about { background: var(--bg); }
.ab, .ab-layers { --ab-navh: calc(var(--nav-height, 72px) + 10px); }
@media (max-width: 768px) { .ab, .ab-layers { --ab-navh: calc(var(--nav-height-mobile, 60px) + env(safe-area-inset-top, 0px) + 8px); } }
.ab h1, .ab h2, .ab h3 { font-size: inherit; line-height: inherit; letter-spacing: inherit; font-weight: inherit; color: inherit; margin: 0; text-wrap: wrap; }
.ab *, .ab *::before, .ab *::after, .ab-layers *, .ab-layers *::before, .ab-layers *::after { box-sizing: border-box; }
.ab p, .ab ul, .ab ol, .ab figure, .ab blockquote { margin: 0; }
.ab ul, .ab ol { padding: 0; list-style: none; }
.ab button, .ab input, .ab-layers button { font: inherit; color: inherit; }
.ab img { max-width: 100%; display: block; }
.ab a { color: inherit; }
.ab svg { display: inline-block; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.ab { position: relative; isolation: isolate; overflow-x: clip; background: var(--bg); color: var(--ink); font: 400 16px/1.6 var(--site-font-body); -webkit-font-smoothing: antialiased; overflow-anchor: none;
  --ab-plate: rgba(8, 12, 18, 0.76); --ab-plate-edge: rgba(255, 255, 255, 0.12); }
.ab .wrap { position: relative; max-width: var(--site-max); margin: 0 auto; padding-left: var(--site-gut-l); padding-right: var(--site-gut-r); }

/* pass 44 (the speed budget): the hero's entrance is CSS, from the first paint. It used to wait for the page script,
   and on a slow phone the headline (the LCP) appeared 3 to 4 s in. Staggered by order; the script only adds .rv-in. */
@keyframes ab-hero-in { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: none; } }
html.ab-js:not(.no-motion) .ab [data-hero] { animation: ab-hero-in 0.9s cubic-bezier(0.22, 1, 0.36, 1) both; }
html.ab-js:not(.no-motion) .ab [data-hero] ~ [data-hero] { animation-delay: 0.08s; }
html.ab-js:not(.no-motion) .ab [data-hero] ~ [data-hero] ~ [data-hero] { animation-delay: 0.16s; }
html.ab-js:not(.no-motion) .ab [data-hero] ~ [data-hero] ~ [data-hero] ~ [data-hero] { animation-delay: 0.24s; }
html.ab-js:not(.no-motion) .ab [data-rv] { opacity: 0; transform: translateY(26px); }
html.ab-js:not(.no-motion) .ab [data-rv].rv-in, html.ab-js:not(.no-motion) .ab [data-hero].rv-in { opacity: 1; transform: none; }
html.ab-js.no-motion .ab [data-rv], html.ab-js.no-motion .ab [data-hero] { opacity: 1; transform: none; transition: none; }

.ab .ghost { position: absolute; z-index: -1; top: -0.12em; left: calc(var(--site-gut-l) - 0.04em); font: var(--site-w-disp) clamp(4.2rem, 16vw, 11.5rem)/1 var(--site-font-disp); letter-spacing: -0.04em;
  color: var(--site-ghost); -webkit-text-stroke: 1px var(--site-ghost-stroke); pointer-events: none; user-select: none; white-space: nowrap; text-transform: uppercase; }
.ab section { position: relative; overflow: clip; } /* clip, not hidden: hidden made each section a scroll box, so the portrait's sticky never engaged (Chris, Oct 29) */

.ab .ab-k { display: inline-flex; align-items: center; gap: 9px; font: 700 0.68rem/1 var(--site-font-disp); letter-spacing: 0.2em; text-transform: uppercase; color: var(--brand-ink); margin-bottom: 14px; }
.ab .ab-k::before { content: ''; width: 26px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--brand-ink), transparent); }
.ab .ab-k--photo::before { background: linear-gradient(90deg, #5BD493, transparent); }
.ab .ab-plate { display: inline-block; padding: 6px 10px; border-radius: 8px; background: var(--ab-plate); border: 1px solid var(--ab-plate-edge); font: 600 0.62rem/1 var(--font-num); letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255, 255, 255, 0.86); }
.ab .ab-h2 { font-size: clamp(1.7rem, 4.4vw, 2.7rem); font-weight: var(--site-w-disp); font-family: var(--site-font-disp); letter-spacing: -0.02em; line-height: 1.08; text-wrap: balance; margin: 0 0 18px; max-width: 18ch; }
.ab .ab-h2 em { font-style: normal; color: var(--brand-ink); }
.ab .ab-lede { font-size: 1.02rem; line-height: 1.6; color: var(--ink-2); max-width: 56ch; margin: 0 0 28px; }

/* the address field (the one CTA) */
.ab .ab-form { display: flex; flex-direction: column; gap: 10px; }
.ab .ab-field { position: relative; display: flex; align-items: center; gap: 12px; min-height: 54px; padding: 0 16px; border-radius: 14px; background: var(--bg); border: 1px solid var(--line-2); box-shadow: var(--sh-1);
  transition: border-color 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out); }
.ab .ab-field:focus-within { border-color: var(--brand-ink); box-shadow: 0 0 0 3px var(--brand-soft), var(--sh-2); }
.ab .ab-field-pin { color: var(--brand-ink); flex-shrink: 0; }
.ab .ab-field input { flex: 1; min-width: 0; background: none; border: 0; outline: none; color: var(--ink); font: 600 16px/52px var(--site-font-body); height: 52px; padding: 0; margin: 0; -webkit-appearance: none; appearance: none; }
.ab .ab-field input::placeholder { color: var(--ink-3); }
.ab .ab-sugg { position: absolute; left: 0; right: 0; top: calc(100% + 6px); z-index: 20; display: none; padding: 6px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line-2); box-shadow: var(--sh-2); text-align: left; }
.ab .ab-sugg.open { display: block; }
.ab .ab-sugg [role="option"] { display: flex; align-items: center; gap: 10px; padding: 11px 12px; border-radius: 10px; cursor: pointer; font-size: 0.92rem; color: var(--ink); }
.ab .ab-sugg [role="option"]:hover { background: var(--brand-soft); }
.ab .ab-sugg [role="option"] svg { width: 16px; height: 16px; flex: none; color: var(--brand-ink); }
.ab .ab-go { position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 54px; padding: 0 24px; border: 0; border-radius: 14px;
  font: 800 0.92rem/1 var(--site-font-disp); letter-spacing: 0.06em; text-transform: uppercase; color: var(--warm-fg); background: linear-gradient(135deg, var(--warm) 0%, var(--site-warm-press) 100%); cursor: pointer; overflow: hidden; white-space: nowrap;
  box-shadow: 0 10px 30px rgba(245, 120, 66, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.22); transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out); }
.ab .ab-go::after { content: ''; position: absolute; top: 0; left: -120%; width: 60%; height: 100%; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.28), transparent); transform: skewX(-18deg); transition: left 0.56s ease; }
.ab .ab-go:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(245, 120, 66, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.3); }
.ab .ab-go:hover::after { left: 160%; }
.ab .ab-go:active { transform: translateY(0) scale(0.98); }
.ab .ab-go svg { width: 18px; height: 18px; }
.ab .ab-go:focus-visible { outline: 2px solid var(--brand-ink); outline-offset: 3px; }
.ab .ab-form-meta { font: 700 0.68rem/1.5 var(--site-font-disp); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); }

/* the before-and-after pair: the before shows; tap, and the after takes its place */
.ab .ab-pair { position: relative; display: block; width: 100%; padding: 0; border: 0; border-radius: 22px; overflow: hidden; cursor: pointer; background: #0A0F15; aspect-ratio: 4 / 3; box-shadow: var(--sh-2); text-align: left; color: #FFFFFF; }
.ab .ab-pair img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 55%; }
.ab .ab-pair .ab-pair-a { opacity: 0; transition: opacity 0.55s var(--ease-out); }
.ab .ab-pair[aria-pressed="true"] .ab-pair-a { opacity: 1; }
.ab .ab-pair::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(8, 12, 18, 0.82) 0%, rgba(8, 12, 18, 0.1) 46%, rgba(8, 12, 18, 0) 70%); pointer-events: none; }
.ab .ab-pair-meta { position: absolute; left: 14px; right: 14px; bottom: 12px; z-index: 1; display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; }
.ab .ab-pair-name { font: 800 0.9rem/1.2 var(--site-font-disp); letter-spacing: -0.01em; text-shadow: 0 1px 12px rgba(0, 0, 0, 0.6); }
.ab .ab-pair-when { font: 600 0.62rem/1 var(--font-num); letter-spacing: 0.12em; text-transform: uppercase; color: rgba(255, 255, 255, 0.78); }
.ab .ab-pair-cue { margin-left: auto; display: inline-flex; align-items: center; padding: 7px 11px; border-radius: 999px; background: rgba(255, 255, 255, 0.14); border: 1px solid rgba(255, 255, 255, 0.22); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); font: 600 0.62rem/1 var(--font-num); letter-spacing: 0.12em; text-transform: uppercase; color: #FFFFFF; white-space: nowrap; }
.ab .ab-pair-cue i { font-style: normal; }
.ab .ab-pair .ab-pair-cue-a, .ab .ab-pair[aria-pressed="true"] .ab-pair-cue-b { display: none; }
.ab .ab-pair[aria-pressed="true"] .ab-pair-cue-a { display: inline; }
.ab .ab-pair .ab-plate--state { position: absolute; left: 12px; top: 12px; z-index: 1; }
.ab .ab-pair:focus-visible { outline: 2px solid var(--brand-ink); outline-offset: 3px; }
.ab .ab-pair:hover .ab-pair-cue { background: rgba(255, 255, 255, 0.22); }
/* the home page's rule (Chris, Oct 29): with a mouse, hovering shows the after and a click pins it; touch taps */
@media (hover: hover) and (pointer: fine) { .ab .ab-pair:hover .ab-pair-a { opacity: 1; } }
html[data-flip="tap"] .ab .ab-pair:not([aria-pressed="true"]):hover .ab-pair-a { opacity: 0; }

.ab .ab-pair--tall { aspect-ratio: 9 / 16; }

/* ═══ the lead ═══ */
.ab .ab-hero { padding: calc(var(--ab-navh) + 36px) 0 48px; min-height: 86svh; display: flex; align-items: center; }
.ab .ab-hero .ghost { top: -0.55em; }
.ab .ab-hero-copy { position: relative; }
.ab .ab-title { font: var(--site-w-disp) clamp(2.35rem, 6.8vw, 4.4rem)/1.02 var(--site-font-disp); letter-spacing: var(--site-track-disp); text-wrap: balance; margin: 0 0 18px; max-width: 16ch; }
.ab .ab-title em { font-style: normal; color: var(--brand-ink); }
.ab .ab-sub { font-size: 1.05rem; line-height: 1.6; color: var(--ink-2); max-width: 46ch; margin: 0 0 24px; }
.ab .ab-legs { display: grid; gap: 8px; max-width: 520px; }
.ab .ab-legs a { display: flex; align-items: center; gap: 14px; padding: 11px 14px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); text-decoration: none; color: var(--ink); font: 600 0.9rem/1.3 var(--site-font-body); transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s var(--ease-out); }
.ab .ab-legs a:hover { border-color: var(--brand-ink); background: var(--brand-soft); transform: translateX(4px); }
.ab .ab-legs b { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; flex: none; background: var(--brand); color: #FFFFFF; font: 700 0.8rem/1 var(--font-num); }
.ab .ab-hero-fig { margin-top: 32px; }
.ab .ab-hero-fig .ab-pair { aspect-ratio: 16 / 11; }
.ab .ab-fig-note { margin: 12px 4px 0; font: 500 0.84rem/1.5 var(--site-font-body); color: var(--ink-2); max-width: 44ch; }

/* ═══ the $2,000 summer ═══ */
.ab .ab-summer { padding: clamp(56px, 10vh, 110px) 0; background: var(--surface); }
html[data-theme="dark"] .ab .ab-summer { background: var(--site-bg-deep); }
.ab .ab-letter { position: relative; max-width: 62ch; padding: 28px 24px 24px; border-radius: var(--r-card); background: var(--bg); border: 1px solid var(--line); box-shadow: var(--sh-1); }
.ab .ab-letter > p { font-size: 1.08rem; line-height: 1.7; color: var(--ink); }
.ab .ab-letter > p + p, .ab .ab-letter > blockquote + p { margin-top: 1em; }
.ab .ab-letter > p:first-child::first-letter { font: var(--site-w-disp) 3.1em/0.85 var(--site-font-disp); float: left; margin: 0.1em 0.14em 0 0; color: var(--brand-ink); }
.ab .ab-pull { margin: 1.3em 0; padding: 18px 20px; border-left: 3px solid var(--warm); border-radius: 0 14px 14px 0; background: var(--warm-soft); }
.ab .ab-pull p { font: 600 1.02rem/1.55 var(--site-font-body); color: var(--ink); }
.ab .ab-sign { margin-top: 20px; font: 700 1.5rem/1 var(--site-font-disp); letter-spacing: -0.02em; color: var(--brand-ink); }
.ab .ab-sign::before { content: ''; display: block; width: 44px; height: 2px; margin: 0 0 12px; background: var(--brand-ink); opacity: 0.5; }

/* ═══ the method ═══ */
.ab .ab-method { padding: clamp(56px, 10vh, 110px) 0; }
.ab .ab-steps { display: grid; gap: 12px; counter-reset: step; }
.ab .ab-step { position: relative; padding: 20px 20px 20px 22px; border-radius: 18px; background: var(--surface); border: 1px solid var(--line); overflow: hidden; }
.ab .ab-step::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--brand); }
.ab .ab-step-n { position: absolute; right: 14px; top: 10px; font: 700 2.6rem/1 var(--font-num); letter-spacing: -0.03em; color: var(--site-ghost); -webkit-text-stroke: 1px var(--site-ghost-stroke); }
.ab .ab-step-i { width: 26px; height: 26px; color: var(--brand-ink); margin-bottom: 12px; }
.ab .ab-step h3 { font: 800 1.15rem/1.2 var(--site-font-disp); letter-spacing: -0.015em; margin: 0 0 8px; }
.ab .ab-step p { font-size: 0.95rem; line-height: 1.6; color: var(--ink-2); max-width: 40ch; }
.ab .ab-step:last-child::before { background: var(--warm); }
.ab .ab-method-foot { margin-top: 22px; font: 600 0.95rem/1.5 var(--site-font-body); color: var(--ink-2); max-width: 60ch; }
.ab .ab-method-foot a { color: var(--brand-ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }

/* ═══ the boundary line ═══ */
.ab .ab-line { padding: clamp(56px, 10vh, 110px) 0; background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
html[data-theme="dark"] .ab .ab-line { background: var(--site-bg-deep); }
.ab .ab-line-title { font: var(--site-w-disp) clamp(2.1rem, 6.4vw, 4rem)/1.02 var(--site-font-disp); letter-spacing: var(--site-track-disp); text-wrap: balance; margin: 0 0 30px; max-width: 24ch; }
.ab .ab-line-title em { font-style: normal; color: var(--brand-ink); }
.ab .ab-line-cols { display: grid; gap: 14px; }
.ab .ab-line-col { padding: 20px; border-radius: 18px; background: var(--bg); border: 1px solid var(--line); }
.ab .ab-line-k { font: 600 0.66rem/1 var(--font-num); letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-2); margin: 0 0 10px; }
.ab .ab-line-col p + p { margin-top: 0.8em; }
.ab .ab-line-col > p:not(.ab-line-k) { font-size: 0.98rem; line-height: 1.65; color: var(--ink); }
.ab .ab-sources { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.ab .ab-sources li { padding: 7px 11px; border-radius: 999px; background: var(--brand-soft); color: var(--brand-ink); font: 600 0.8rem/1.2 var(--site-font-body); }
.ab .ab-sources a { text-decoration: none; }

/* ═══ the four nevers ═══ */
.ab .ab-never { padding: clamp(56px, 10vh, 110px) 0; }
.ab .ab-nevers { display: grid; gap: 12px; }
.ab .ab-nv { padding: 20px; border-radius: 18px; background: var(--surface); border: 1px solid var(--line); }
.ab .ab-nv h3 { display: flex; align-items: center; gap: 12px; font: 800 1.15rem/1.2 var(--site-font-disp); letter-spacing: -0.015em; margin: 0 0 10px; }
.ab .ab-nv-x { position: relative; width: 26px; height: 26px; flex: none; border-radius: 8px; background: var(--warm-soft); }
.ab .ab-nv-x::before, .ab .ab-nv-x::after { content: ''; position: absolute; left: 50%; top: 50%; width: 13px; height: 2.5px; border-radius: 2px; background: var(--warm-ink); transform: translate(-50%, -50%) rotate(45deg); }
.ab .ab-nv-x::after { transform: translate(-50%, -50%) rotate(-45deg); }
.ab .ab-nv p { font-size: 0.95rem; line-height: 1.6; color: var(--ink-2); max-width: 52ch; }

/* ═══ the bio ═══ */
.ab .ab-bio { padding: clamp(56px, 10vh, 110px) 0; background: var(--surface); border-top: 1px solid var(--line); }
html[data-theme="dark"] .ab .ab-bio { background: var(--site-bg-deep); }
.ab .ab-bio-grid { display: grid; gap: 28px; }
.ab .ab-portrait { position: relative; border-radius: 22px; overflow: hidden; aspect-ratio: 4 / 5; background: #0A0F15; box-shadow: var(--sh-2); max-width: 420px; }
.ab .ab-portrait img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 20%; }
.ab .ab-portrait figcaption { position: absolute; left: 12px; bottom: 12px; }
.ab .ab-facts { display: grid; gap: 8px; margin: 0 0 20px; }
.ab .ab-facts li { display: flex; align-items: flex-start; gap: 10px; font: 600 0.95rem/1.45 var(--site-font-body); color: var(--ink); }
.ab .ab-facts svg { width: 18px; height: 18px; flex: none; color: var(--brand-ink); margin-top: 2px; }
.ab .ab-bio-text p { font-size: 1rem; line-height: 1.65; color: var(--ink-2); max-width: 60ch; }
.ab .ab-bio-text p + p { margin-top: 0.9em; }
.ab .ab-course { margin-top: 26px; padding: 18px 18px 8px; border-radius: 18px; background: var(--bg); border: 1px solid var(--line); }
.ab .ab-course-k { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; margin: 0 0 8px; font: 600 0.7rem/1 var(--font-num); letter-spacing: 0.16em; text-transform: uppercase; color: var(--brand-ink); }
.ab .ab-course-k span { font: 500 0.76rem/1.3 var(--site-font-body); letter-spacing: 0; text-transform: none; color: var(--ink-2); }
.ab .ab-course-list li { display: grid; grid-template-columns: minmax(0, 1fr) auto; grid-template-areas: "name link" "meta link"; column-gap: 12px; padding: 11px 0; border-top: 1px solid var(--line); align-items: center; }
.ab .ab-course-list li:first-child { border-top: 0; }
.ab .ab-course-list b { grid-area: name; font: 700 0.92rem/1.3 var(--site-font-body); color: var(--ink); }
.ab .ab-course-list span { grid-area: meta; font: 500 0.78rem/1.4 var(--site-font-body); color: var(--ink-2); }
.ab .ab-course-list a { grid-area: link; display: inline-flex; align-items: center; gap: 6px; padding: 7px 10px; border-radius: 999px; border: 1px solid var(--line-2); font: 600 0.68rem/1 var(--font-num); letter-spacing: 0.1em; text-transform: uppercase; color: var(--brand-ink); text-decoration: none; white-space: nowrap; }
.ab .ab-course-list a svg { width: 12px; height: 12px; }
.ab .ab-course-list a:hover { background: var(--brand-soft); border-color: var(--brand-ink); }

/* ═══ the proving grounds ═══ */
.ab .ab-grounds { padding: clamp(56px, 10vh, 110px) 0; }
.ab .ab-grounds-grid { display: grid; gap: 12px; }
.ab .ab-ruby { position: relative; border-radius: 22px; overflow: hidden; aspect-ratio: 4 / 3; background: #0A0F15; box-shadow: var(--sh-2); color: #FFFFFF; }
.ab .ab-ruby img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 45%; }
.ab .ab-ruby::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(8, 12, 18, 0.78) 0%, rgba(8, 12, 18, 0) 48%); pointer-events: none; }
.ab .ab-ruby figcaption { position: absolute; left: 14px; right: 14px; bottom: 12px; z-index: 1; display: flex; align-items: center; gap: 10px; }

/* ═══ the quotes ═══ */
.ab .ab-quotes { padding: clamp(56px, 10vh, 110px) 0; background: var(--surface); border-top: 1px solid var(--line); }
html[data-theme="dark"] .ab .ab-quotes { background: var(--site-bg-deep); }
.ab .ab-quote-grid { display: grid; gap: 12px; }
.ab .ab-q { display: flex; flex-direction: column; gap: 14px; padding: 20px; border-radius: 18px; background: var(--bg); border: 1px solid var(--line); }
.ab .ab-q blockquote p { font: 600 1.08rem/1.5 var(--site-font-body); color: var(--ink); }
.ab .ab-q--photo blockquote p { font-size: 1.15rem; }
.ab .ab-q figcaption { display: flex; flex-direction: column; gap: 2px; margin-top: auto; }
.ab .ab-q figcaption b { font: 700 0.92rem/1.3 var(--site-font-body); color: var(--ink); }
.ab .ab-q figcaption span { font: 500 0.78rem/1.4 var(--site-font-body); color: var(--ink-2); }
.ab .ab-q .ab-pair { aspect-ratio: 16 / 10; border-radius: 14px; }
.ab .ab-q .ab-pair--tall { aspect-ratio: 5 / 7; max-width: 300px; }
.ab .ab-quotes-foot { margin-top: 16px; font: 500 0.82rem/1.5 var(--site-font-body); color: var(--ink-2); }

/* ═══ the close ═══ */
.ab .ab-close { position: relative; padding: clamp(64px, 12vh, 130px) 0; color: #FFFFFF; background: #0A0F15; border-top: 1px solid var(--line); overflow: hidden; }
.ab .ab-close-photo { position: absolute; inset: 0; }
.ab .ab-close-photo img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 40%; }
.ab .ab-close-shade { position: absolute; inset: 0; background: linear-gradient(to right, rgba(8, 12, 18, 0.92) 0%, rgba(8, 12, 18, 0.78) 48%, rgba(8, 12, 18, 0.5) 100%), linear-gradient(to top, var(--bg) 0%, rgba(10, 15, 21, 0) 22%, rgba(10, 15, 21, 0) 86%, rgba(10, 15, 21, 0.7) 100%); }
.ab .ab-close .ghost { top: -0.1em; right: var(--site-gut-r); left: auto; color: rgba(255, 255, 255, 0.05); -webkit-text-stroke: 1px rgba(255, 255, 255, 0.12); }
.ab .ab-k--photo { color: #5BD493; }
.ab .ab-close-title { font: var(--site-w-disp) clamp(2.1rem, 6.4vw, 4rem)/1.02 var(--site-font-disp); letter-spacing: var(--site-track-disp); text-wrap: balance; margin: 0 0 16px; max-width: 14ch; text-shadow: 0 2px 30px rgba(0, 0, 0, 0.5); }
.ab .ab-close-title em { font-style: normal; color: #5BD493; }
.ab .ab-close-sub { font-size: 1.02rem; line-height: 1.6; color: rgba(255, 255, 255, 0.82); max-width: 44ch; margin: 0 0 24px; }
.ab .ab-close-field { padding: 10px; border-radius: 20px; background: var(--site-glass-2); border: 1px solid var(--line); -webkit-backdrop-filter: blur(14px) saturate(140%); backdrop-filter: blur(14px) saturate(140%); box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.05); max-width: 560px; color: var(--ink); }
.ab .ab-close-field .ab-form-meta { padding: 0 8px 4px; }
/* the two beats of the line land one after the other */
html.ab-js:not(.no-motion) .ab .ab-beat { display: inline; opacity: 0; transition: opacity 0.7s var(--ease-out), transform 0.9s var(--ease-out); }
html.ab-js:not(.no-motion) .ab .rv-in .ab-beat { opacity: 1; }
html.ab-js:not(.no-motion) .ab .rv-in em.ab-beat { transition-delay: 0.5s; }

/* ═══ desktop ═══ */
@media (min-width: 900px) {
  .ab .ab-hero { padding-top: calc(var(--ab-navh) + 56px); padding-bottom: 72px; min-height: 92svh; }
  .ab .ab-hero .wrap { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); column-gap: 56px; align-items: center; }
  .ab .ab-hero-fig { margin-top: 0; }
  .ab .ab-hero-fig .ab-pair { aspect-ratio: 4 / 3; }
  .ab .ab-summer .wrap { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); column-gap: 56px; align-items: start; }
  .ab .ab-summer .wrap > .ab-k, .ab .ab-summer .wrap > .ab-h2 { grid-column: 1; }
  .ab .ab-summer .wrap > .ab-letter { grid-column: 2; grid-row: 1 / span 2; }
  .ab .ab-summer .ab-h2 { max-width: 12ch; }
  .ab .ab-letter { padding: 36px 36px 32px; }
  .ab .ab-steps { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
  .ab .ab-step { padding: 24px 22px 24px 24px; }
  .ab .ab-line-cols { grid-template-columns: 1fr 1fr; gap: 16px; }
  .ab .ab-nevers { grid-template-columns: 1fr 1fr; gap: 14px; }
  .ab .ab-bio-grid { grid-template-columns: minmax(380px, 44%) minmax(0, 1fr); column-gap: 56px; align-items: start; }
  /* the portrait holds while the right column runs to the end of the coursework, then both scroll away together.
     It sits under the nav (the site's glass nav stays on screen) and never runs taller than the screen. */
  .ab .ab-portrait { position: sticky; top: calc(var(--ab-navh) + 16px); max-width: none; aspect-ratio: 4 / 5; max-height: calc(100svh - var(--ab-navh) - 32px); }
  .ab .ab-grounds-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); grid-auto-rows: 380px; gap: 14px; }
  .ab .ab-ruby, .ab .ab-grounds-grid .ab-pair { aspect-ratio: auto; height: 100%; }
  .ab .ab-quote-grid { grid-template-columns: 1.6fr 1fr; grid-template-rows: auto auto; gap: 14px; }
  .ab .ab-q--photo { grid-row: 1 / span 2; display: grid; grid-template-columns: 300px minmax(0, 1fr); grid-template-areas: "pair quote" "pair who"; column-gap: 20px; align-content: start; }
  .ab .ab-q--photo .ab-pair { grid-area: pair; max-width: none; }
  .ab .ab-q--photo blockquote { grid-area: quote; }
  .ab .ab-q--photo figcaption { grid-area: who; }
  .ab .ab-q--photo blockquote p { font-size: 1.25rem; }
  .ab .ab-form { flex-direction: row; align-items: center; flex-wrap: wrap; }
  .ab .ab-form .ab-field { flex: 1 1 320px; }
  .ab .ab-form .ab-form-meta { flex-basis: 100%; }
}
@media (min-width: 900px) and (max-width: 1100px) {
  .ab .ab-steps { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 599px) {
  .ab .ab-course-list li { grid-template-columns: minmax(0, 1fr); grid-template-areas: "name" "meta" "link"; row-gap: 4px; }
  .ab .ab-course-list a { justify-self: start; margin-top: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  .ab .ab-legs a, .ab .ab-go, .ab .ab-pair .ab-pair-a { transition: none; }
}

html.lenis, html.lenis body { height: auto; }
html.lenis { scroll-behavior: auto !important; }
html.lenis.lenis-stopped { overflow: hidden; }

/* pass 43 (REF §1.7): the longer arms of the bio and boundary lines read at a smaller size; AB-4's method line */
.ab .ab-h2 .ab-h2-long { font-size: 0.64em; line-height: 1.25; }   /* never set display here: it would beat [hidden] */
.ab .ab-line-title .ab-line-long { font-size: 0.62em; line-height: 1.3; }
.ab .ab-method-line { margin-top: 10px; font-weight: 600; color: var(--ink); }

/* pass 44: right-sized photos arrive in a <picture>; it takes no box, so every rule written for the img still applies */
.ab picture { display: contents; }

/* pass 46 (D-353): the 13 sources, a plain list (name linked, then the publisher; ERA5's label and credit under it) */
.ab .ab-sources-k { margin-top: 14px; font-weight: 600; color: var(--ink); }
.ab .ab-sources { display: block; margin: 10px 0 0; padding: 0; list-style: none; }
.ab .ab-sources li { display: block; padding: 9px 0; border-radius: 0; background: none; border-top: 1px solid var(--line); color: var(--ink-2); font: 500 0.88rem/1.45 var(--site-font-body); }
.ab .ab-sources li:last-child { border-bottom: 1px solid var(--line); }
.ab .ab-sources a { color: var(--brand-ink); font-weight: 700; text-decoration: underline; text-underline-offset: 2px; }
.ab .ab-sources .ab-src-note { display: block; margin-top: 3px; font-size: 0.78rem; color: var(--ink-2); }