/* Alpha Devices — site styles (Rev 2). Vanilla CSS, self-hosted fonts, no external requests. */

@font-face { font-family: "Inter"; src: url("fonts/Inter-var.woff2") format("woff2"); font-weight: 300 700; font-style: normal; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/JetBrainsMono-var.woff2") format("woff2"); font-weight: 400 700; font-style: normal; font-display: swap; }

:root {
  --white: #ffffff;
  --paper: #f2f2f2;
  --paper-2: #e6e6e6;
  --ink: #0b0b0c;
  --ink-2: #4d4d4d;
  --muted: #6b6b6b;
  --line: #e6e6e6;
  --line-2: #b3b3b3;
  --red: #e03c31;
  --dark: #0b0b0c;
  --dark-2: #1a1a1c;
  --font: "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", Menlo, Consolas, monospace;
  --max: 1200px;
  --gutter: clamp(16px, 5vw, 48px);
  --section: clamp(72px, 10vw, 136px);
  --header-h: 72px;
  --r: 14px;
  --r-s: 6px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --shadow: 0 1px 2px rgba(11, 11, 12, .04), 0 12px 32px -16px rgba(11, 11, 12, .18);
  --shadow-up: 0 2px 4px rgba(11, 11, 12, .05), 0 24px 48px -20px rgba(11, 11, 12, .28);
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 400 17px/1.6 var(--font); color: var(--ink); background: var(--white); -webkit-font-smoothing: antialiased; font-optical-sizing: auto; overflow-x: clip; }
img, svg { max-width: 100%; height: auto; }
figure { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 4px; }
.on-dark :focus-visible { outline-color: #fff; }
h1, h2, h3, h4 { margin: 0; font-weight: 500; letter-spacing: -0.025em; text-wrap: balance; }
h1 { font-size: clamp(38px, 5vw, 64px); line-height: 1.02; letter-spacing: -0.035em; margin-bottom: 24px; }
.hero-home h1 { font-size: clamp(42px, 6.2vw, 84px); line-height: 0.98; letter-spacing: -0.04em; margin-bottom: 28px; }
h2 { font-size: clamp(32px, 3.8vw, 52px); line-height: 1.04; letter-spacing: -0.035em; margin-bottom: 20px; }
h3 { font-size: 22px; line-height: 1.25; font-weight: 600; letter-spacing: -0.015em; }
h4 { font-size: 14px; letter-spacing: 0; margin: 18px 0 6px; font-weight: 600; }
p { margin: 0 0 1em; max-width: 62ch; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0 0 1em; }
.lead { font-size: clamp(18px, 1.6vw, 22px); line-height: 1.5; color: var(--ink-2); letter-spacing: -0.005em; }
.large { font-size: clamp(22px, 2.2vw, 30px); line-height: 1.3; letter-spacing: -0.02em; font-weight: 500; }
.kicker { font: 500 13px/1.4 var(--mono); color: var(--muted); margin: 0 0 20px; letter-spacing: 0; }
.kicker .n { color: var(--red); margin-right: 10px; }
.on-dark .kicker { color: rgba(255, 255, 255, .55); }
.num { font: 500 13px/1 var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.arrow { display: inline-block; margin-left: 2px; transition: transform .3s var(--ease); }
a:hover .arrow { transform: translateX(3px); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: 16px; top: -100px; z-index: 100; padding: 10px 14px; background: var(--ink); color: #fff; border-radius: var(--r-s); }
.skip-link:focus { top: 12px; }

/* ---------- layout ---------- */
.container { max-width: var(--max); margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }
.section { padding: var(--section) 0; position: relative; }
.section-paper { background: var(--paper); }
.section-line { border-top: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: clamp(36px, 5vw, 64px); }
.section-head p:not(.kicker) { color: var(--ink-2); }
.section-foot { margin-top: clamp(28px, 3vw, 40px); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: center; }
.split-start { align-items: start; }
.prose-grid { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.prose p { color: var(--ink-2); }
.prose .large { color: var(--ink); margin-bottom: 1.2em; }
.sticky { position: sticky; top: calc(var(--header-h) + 32px); }

/* ---------- links and buttons ---------- */
.link { font-weight: 500; background-image: linear-gradient(currentColor, currentColor); background-repeat: no-repeat; background-size: 0% 1px; background-position: 0 100%; transition: background-size .35s var(--ease); padding-bottom: 2px; }
.link:hover, .link:focus-visible { background-size: 100% 1px; }
.link-light { color: #fff; }
.u { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-2); transition: text-decoration-color .2s; }
.u:hover { text-decoration-color: currentColor; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 24px; border-radius: 999px; background: var(--ink); color: #fff; border: 1px solid var(--ink); font-size: 15px; font-weight: 500; line-height: 1.2; white-space: nowrap; cursor: pointer; transition: transform .3s var(--ease), background .2s, color .2s, border-color .2s, box-shadow .3s var(--ease); }
.btn:hover { background: #2a2a2d; border-color: #2a2a2d; transform: translateY(-2px); box-shadow: 0 10px 24px -14px rgba(11, 11, 12, .5); }
.btn:active { transform: translateY(0); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn-light { background: #fff; color: var(--ink); border-color: #fff; }
.btn-light:hover { background: var(--paper); border-color: var(--paper); box-shadow: none; }
.btn-small { padding: 10px 18px; font-size: 14px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* ---------- header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .82); -webkit-backdrop-filter: saturate(160%) blur(14px); backdrop-filter: saturate(160%) blur(14px); border-bottom: 1px solid transparent; transition: border-color .3s; }
.site-header.is-scrolled { border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: var(--header-h); }
.brand { display: inline-flex; align-items: center; color: var(--ink); }
.mark { display: block; height: 28px; width: auto; aspect-ratio: 2137.02 / 1016.92; }
.js .brand .mark { clip-path: inset(0 0 0 0); }
.js.loading .brand .mark { clip-path: inset(0 100% 0 0); }
.brand .mark { transition: clip-path 1s var(--ease) .1s; }
.site-nav { display: flex; align-items: center; gap: 32px; }
.site-nav ul { display: flex; gap: 28px; margin: 0; padding: 0; list-style: none; }
.site-nav a:not(.btn) { display: inline-block; padding: 8px 0; font-size: 15px; font-weight: 500; color: var(--ink-2); background-image: linear-gradient(var(--ink), var(--ink)); background-repeat: no-repeat; background-size: 0% 1px; background-position: 0 calc(100% - 4px); transition: background-size .35s var(--ease), color .2s; }
.site-nav a:not(.btn):hover, .site-nav a:not(.btn)[aria-current="page"] { color: var(--ink); background-size: 100% 1px; }
.nav-toggle { display: none; width: 44px; height: 44px; margin-right: -8px; padding: 0; border: 0; background: transparent; cursor: pointer; }
.nav-toggle-bars { position: relative; display: block; width: 22px; height: 2px; margin: 0 auto; background: var(--ink); transition: background .2s; }
.nav-toggle-bars::before, .nav-toggle-bars::after { content: ""; position: absolute; left: 0; width: 22px; height: 2px; background: var(--ink); transition: transform .3s var(--ease), top .3s var(--ease); }
.nav-toggle-bars::before { top: -7px; }
.nav-toggle-bars::after { top: 7px; }
.nav-open .nav-toggle-bars { background: transparent; }
.nav-open .nav-toggle-bars::before { top: 0; transform: rotate(45deg); }
.nav-open .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); }

/* ---------- artwork ---------- */
.art { width: 100%; }
.art img { display: block; width: 100%; height: auto; aspect-ratio: 1; object-fit: contain; background: none; border: 0; }
.art-w { display: none; }
.on-dark .art-b { display: none; }
.on-dark .art-w { display: block; }

/* ---------- hero ---------- */
.hero { padding: clamp(40px, 6vw, 80px) 0 clamp(56px, 7vw, 104px); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
.hero-text .hero-grid { grid-template-columns: minmax(0, 1fr); }
.hero-text .hero-copy { max-width: 900px; }
.hero-copy .lead { max-width: 54ch; }
.hero-art { max-width: 520px; width: 100%; justify-self: end; perspective: 1200px; }
.hero-art img { transition: transform .5s var(--ease); will-change: transform; transform-style: preserve-3d; }
.js.loading .hero-copy > * { opacity: 0; transform: translateY(14px); }
.hero-copy > * { transition: opacity .8s var(--ease), transform .8s var(--ease); }
.hero-copy > :nth-child(2) { transition-delay: .08s; }
.hero-copy > :nth-child(3) { transition-delay: .16s; }
.hero-copy > :nth-child(4) { transition-delay: .24s; }
.js.loading .hero-art { opacity: 0; transform: translateY(18px) scale(.98); }
.hero-art { transition: opacity 1s var(--ease) .2s, transform 1s var(--ease) .2s; }

/* ---------- litigation: sticky copy + counting figures ---------- */
.liti-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.liti-copy .art { max-width: 300px; margin-top: 36px; }
.figures { display: grid; }
.figure { padding: clamp(28px, 3vw, 40px) 0 clamp(28px, 3vw, 40px); border-top: 1px solid var(--line-2); position: relative; }
.figure::after { content: ""; position: absolute; left: 0; top: -1px; height: 1px; width: 0; background: var(--red); transition: width 1.4s var(--ease); }
.figure.is-in::after { width: 100%; }
.figure:last-child { border-bottom: 1px solid var(--line-2); }
.stat { display: block; font: 500 clamp(56px, 8vw, 112px)/1 var(--mono); letter-spacing: -0.06em; font-variant-numeric: tabular-nums; margin-bottom: 18px; }
.stat-q { display: block; font: 500 13px/1 var(--mono); letter-spacing: 0; color: var(--muted); margin-bottom: 12px; }
.figure h3 { font-size: 20px; margin-bottom: 10px; }
.figure p { color: var(--ink-2); font-size: 16px; margin-bottom: 12px; }
.figure .link { font-size: 15px; }

/* ---------- capability explorer ---------- */
.explorer { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.tabs { display: grid; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line-2); }
.tab { display: grid; grid-template-columns: 36px minmax(0, 1fr); align-items: center; gap: 8px; width: 100%; text-align: left; padding: 16px 0 16px 14px; border: 0; border-bottom: 1px solid var(--line-2); background: transparent; cursor: pointer; font-size: 17px; font-weight: 500; color: var(--ink-2); position: relative; transition: color .2s, padding-left .3s var(--ease); }
.tab::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--red); transform: scaleY(0); transform-origin: top; transition: transform .35s var(--ease); }
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { color: var(--ink); padding-left: 18px; }
.tab[aria-selected="true"]::before { transform: scaleY(1); }
.tab .num { padding-top: 2px; }
.tab[aria-selected="true"] .num { color: var(--ink); }
.panel-wrap { position: relative; min-height: 420px; }
.cap-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .8fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
.cap-panel[hidden] { display: none; }
.cap-panel h3 { font-size: clamp(26px, 2.6vw, 36px); font-weight: 500; letter-spacing: -0.03em; margin-bottom: 14px; }
.cap-panel > div > p { color: var(--ink-2); }
.cap-panel .art { max-width: 420px; justify-self: end; }
.js .cap-panel.is-enter { animation: panel-in .45s var(--ease) both; }
@keyframes panel-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.deliverable { border-left: 2px solid var(--ink); padding-left: 18px; margin: 24px 0; }
.deliverable b { display: block; font: 500 13px/1.4 var(--mono); color: var(--muted); margin-bottom: 6px; }
.deliverable p { margin: 0; font-size: 16px; }
.checklist { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; font-size: 15.5px; color: var(--ink-2); }
.checklist li { position: relative; padding-left: 20px; }
.checklist li::before { content: ""; position: absolute; left: 0; top: .75em; width: 10px; height: 1px; background: var(--ink); }
.checklist-2 { grid-template-columns: 1fr 1fr; gap: 10px 28px; }
.cap-panel .link { display: inline-block; margin-top: 24px; }

/* ---------- audience toggle ---------- */
.seg { display: inline-flex; padding: 4px; border-radius: 999px; background: var(--paper); gap: 2px; max-width: 100%; overflow-x: auto; }
.on-dark .seg { background: var(--dark-2); }
.seg button { border: 0; background: transparent; padding: 10px 18px; border-radius: 999px; font-size: 15px; font-weight: 500; color: var(--ink-2); cursor: pointer; white-space: nowrap; transition: background .25s, color .25s, box-shadow .25s; }
.seg button:hover { color: var(--ink); }
.seg button[aria-selected="true"] { background: var(--ink); color: #fff; box-shadow: 0 4px 12px -6px rgba(11, 11, 12, .5); }
.seg-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; margin-bottom: clamp(32px, 4vw, 48px); }
.seg-row .kicker { margin: 0; }
.aud-panel { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(28px, 5vw, 80px); align-items: center; }
.aud-panel[hidden] { display: none; }
.aud-art { background: none; padding: 0; }
.aud-art .art { max-width: 420px; margin: 0 auto; }
.aud-panel h3 { font-size: clamp(26px, 2.8vw, 38px); font-weight: 500; letter-spacing: -0.03em; margin-bottom: 14px; }
.aud-panel > div > p { color: var(--ink-2); }
.aud-panel .result { color: var(--ink); font-weight: 500; }
.bullets { padding-left: 18px; color: var(--ink-2); font-size: 16px; margin: 0 0 28px; }
.bullets li { margin-bottom: 8px; padding-left: 4px; }
.js .aud-panel.is-enter { animation: panel-in .45s var(--ease) both; }

/* ---------- device grid with filter ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 clamp(28px, 3vw, 40px); padding: 0; list-style: none; }
.chip { border: 1px solid var(--line-2); background: transparent; border-radius: 999px; padding: 9px 16px; font-size: 14px; font-weight: 500; color: var(--ink-2); cursor: pointer; transition: background .25s, color .25s, border-color .25s, transform .3s var(--ease); }
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.chip-count { font: 500 13px/1 var(--mono); color: var(--muted); align-self: center; margin-left: 8px; font-variant-numeric: tabular-nums; }
.devgrid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.devgrid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.dev { position: relative; display: flex; flex-direction: column; gap: 10px; padding: 24px; border-radius: var(--r); background: var(--white); color: inherit; min-height: 260px; overflow: hidden; transition: transform .4s var(--ease), box-shadow .4s var(--ease); scroll-margin-top: calc(var(--header-h) + 16px); }
.section-paper .dev { background: var(--white); }
.section:not(.section-paper) .dev { background: var(--paper); }
.dev:hover { transform: translateY(-2px); box-shadow: var(--shadow-up); }
.dev .art { position: absolute; right: -6px; top: -6px; width: 128px; transition: transform .6s var(--ease); }
.dev:hover .art { transform: translate(-4px, 4px) scale(1.06) rotate(-2deg); }
.dev .num { margin-bottom: auto; }
.dev h3 { font-size: 19px; padding-right: 110px; }
.dev p { margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.5; }
.dev h4 { color: var(--muted); font-size: 13px; font-weight: 500; margin: 10px 0 2px; font-family: var(--mono); }
.devgrid-2 .dev { min-height: 0; padding: 28px 180px 28px 28px; }
.devgrid-2 .dev .art { width: 150px; }
.devgrid-2 .dev h3 { font-size: 22px; padding-right: 120px; }
.dev[hidden] { display: none; }
.js .dev.is-enter { animation: tile-in .4s var(--ease) both; }
@keyframes tile-in { from { opacity: 0; transform: scale(.97); } to { opacity: 1; transform: none; } }
.dev-empty { color: var(--muted); font-size: 15px; padding: 24px 0; }
.dev-empty[hidden] { display: none; }

/* ---------- process stepper ---------- */
.process-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.process-copy .art { max-width: 320px; margin-top: 32px; }
.steps { list-style: none; margin: 0; padding: 0 0 0 44px; position: relative; }
.steps::before { content: ""; position: absolute; left: 7px; top: 12px; bottom: 12px; width: 1px; background: var(--line-2); }
.steps::after { content: ""; position: absolute; left: 7px; top: 12px; height: calc(var(--p, 0) * (100% - 24px)); width: 1px; background: var(--red); transition: height .2s linear; }
.step { position: relative; padding: 0 0 clamp(36px, 4vw, 56px); transition: opacity .4s; }
.step:last-child { padding-bottom: 0; }
.step::before { content: ""; position: absolute; left: -41px; top: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--white); border: 1px solid var(--line-2); transition: background .3s, border-color .3s, transform .3s var(--ease); z-index: 1; }
.step.is-done::before { background: var(--red); border-color: var(--red); }
.step.is-active::before { background: var(--red); border-color: var(--red); transform: scale(1.5); }
.step .num { display: block; margin-bottom: 10px; }
.step.is-active .num { color: var(--red); }
.step h3 { font-size: clamp(22px, 2.2vw, 28px); font-weight: 500; letter-spacing: -0.025em; margin-bottom: 8px; }
.step p { margin: 0; color: var(--ink-2); max-width: 52ch; }
.js .steps[data-live] .step:not(.is-active):not(.is-done) { opacity: .7; }
.js .steps[data-live] .step.is-done { opacity: .85; }

/* ---------- resources shelf ---------- */
.shelf-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.shelf { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2.5vw, 28px); margin: 0; padding: 0; list-style: none; perspective: 1400px; }
.shelf-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.book { display: block; color: inherit; scroll-margin-top: calc(var(--header-h) + 16px); }
.cover { display: block; position: relative; aspect-ratio: 330 / 510; border-radius: 3px 8px 8px 3px; overflow: hidden; background: var(--white); box-shadow: var(--shadow); transform: rotateY(-7deg) rotateX(1deg); transform-origin: left center; transition: transform .6s var(--ease), box-shadow .6s var(--ease); }
.cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0, 0, 0, .10), rgba(0, 0, 0, 0) 7%, rgba(255, 255, 255, .25) 8%, rgba(255, 255, 255, 0) 12%); pointer-events: none; }
.cover img { display: block; width: 100%; height: 100%; object-fit: cover; }
.book:hover .cover, .book:focus-visible .cover { transform: rotateY(0) translateY(-6px); box-shadow: var(--shadow-up); }
.cover-type { display: flex; flex-direction: column; background: var(--white); }
.cover-type .cover-art { position: static; transform: none; width: 100%; flex: 0 0 54%; display: flex; align-items: center; justify-content: center; background: #f6f6f6; }
.cover-type .cover-art .art { width: 64%; }
.cover-type .cover-body { flex: 1; display: flex; flex-direction: column; padding: 8% 11% 9%; }
.cover-type .kicker { font-size: 9px; margin: 0 0 10px; }
.cover-type .kicker .n { margin-right: 6px; }
.cover-type .cover-title { font-size: clamp(14px, 1.3vw, 19px); font-weight: 600; letter-spacing: -0.02em; line-height: 1.2; margin: 0 0 6px; }
.cover-type .cover-sub { font-size: 10px; line-height: 1.4; color: var(--ink-2); margin: 0; }
.cover-type .mark { height: auto; width: 26%; margin-top: auto; align-self: flex-end; }
.book-meta { display: block; padding-top: 22px; }
.book-meta .num { display: block; margin-bottom: 12px; font: 500 12px/1.5 var(--mono); color: var(--muted); }
.book h3 { font-size: 18px; margin-bottom: 8px; }
.book p { margin: 0; color: var(--ink-2); font-size: 14.5px; line-height: 1.5; }
.book .meta { display: block; margin-top: 8px; font: 500 12px/1.4 var(--mono); color: var(--muted); }
.book-actions { display: flex; flex-wrap: wrap; gap: 4px 18px; margin-top: 10px; font-size: 14px; font-weight: 500; }
.list-heading { font: 500 13px/1.4 var(--mono); color: var(--muted); margin: 0 0 8px; }
.downloads { list-style: none; margin: 0; padding: 0; }
.downloads li { border-top: 1px solid var(--line-2); }
.downloads li:last-child { border-bottom: 1px solid var(--line-2); }
.downloads a { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 4px 16px 0; font-weight: 500; transition: padding-left .3s var(--ease); }
.downloads a:hover { padding-left: 8px; }
.downloads span { font: 500 12px/1 var(--mono); color: var(--muted); white-space: nowrap; }

/* ---------- commitments trio / info trio ---------- */
.trio { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(24px, 4vw, 48px); }
.trio > div { border-top: 1px solid var(--ink); padding-top: 22px; }
.trio h3 { font-size: 21px; margin-bottom: 12px; }
.trio p { margin: 0; color: var(--ink-2); font-size: 16px; }
.trio .num { display: block; margin-bottom: 14px; }

/* ---------- capability details page ---------- */
.capnav-grid { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); gap: clamp(24px, 4vw, 64px); align-items: start; }
.capnav { margin: 0; padding: 0; list-style: none; border-left: 1px solid var(--line-2); }
.capnav a { display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 6px; padding: 10px 0 10px 16px; font-size: 15px; font-weight: 500; color: var(--ink-2); position: relative; transition: color .2s; }
.capnav a::before { content: ""; position: absolute; left: -1px; top: 0; bottom: 0; width: 2px; background: var(--red); transform: scaleY(0); transition: transform .3s var(--ease); }
.capnav-plain a { display: block; }
.capnav a:hover { color: var(--ink); }
.capnav a.is-current { color: var(--ink); }
.capnav a.is-current::before { transform: scaleY(1); }
.capnav a.is-current .num { color: var(--red); }
.details { display: grid; gap: clamp(56px, 7vw, 104px); }
.detail { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .85fr); gap: clamp(28px, 4vw, 64px); align-items: center; scroll-margin-top: calc(var(--header-h) + 24px); }
.detail-records { align-items: start; }
.detail-art { max-width: 400px; justify-self: center; }
.detail-copy h2 { font-size: clamp(28px, 3vw, 42px); }
.detail-copy > p:not(.kicker) { color: var(--ink-2); }
.caveat { font-size: 14px; line-height: 1.6; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; margin-top: 28px; max-width: none; }
.caveat a { text-decoration: underline; text-underline-offset: 3px; }
.directory-wrap { min-width: 0; background: var(--paper); border-radius: var(--r); padding: clamp(20px, 3vw, 32px); }
.directory { margin: 0; }
.directory > div { padding: 14px 0 16px; border-top: 1px solid var(--line-2); }
.directory > div:first-child { border-top: 0; padding-top: 0; }
.directory dt { font-weight: 600; font-size: 16px; margin-bottom: 4px; }
.directory dd { margin: 0; color: var(--ink-2); font-size: 14.5px; line-height: 1.5; }
.directory-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; }
.directory-2 > div:nth-child(2) { border-top: 0; padding-top: 0; }
.directory-2 dt a { font-weight: 600; }

/* ---------- client panels page ---------- */
.panels { display: grid; gap: clamp(56px, 8vw, 120px); padding-bottom: var(--section); }
.panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); align-items: center; scroll-margin-top: calc(var(--header-h) + 24px); }
.panel-art { background: none; padding: 0; }
.panel-art .art { max-width: 400px; margin: 0 auto; }
.panel:nth-child(even) > .panel-art { order: -1; }
.panel-copy h2 { font-size: clamp(28px, 3.2vw, 44px); }
.panel-copy > p:not(.kicker) { color: var(--ink-2); }
.panel-copy .result { color: var(--ink); font-weight: 500; }

/* ---------- standards ---------- */
.std-grid { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); gap: clamp(24px, 4vw, 64px); align-items: start; }
.standards-group { scroll-margin-top: calc(var(--header-h) + 24px); }
.standards-group + .standards-group { margin-top: clamp(40px, 5vw, 64px); }
.standards-group h3 { font-size: 24px; font-weight: 500; letter-spacing: -0.025em; }
.standards { width: 100%; border-collapse: collapse; font-size: 15px; margin-top: 16px; }
.standards th { text-align: left; font: 500 13px/1.4 var(--mono); color: var(--muted); padding: 0 16px 12px 0; border-bottom: 1px solid var(--ink); }
.standards td { vertical-align: top; padding: 16px 16px 16px 0; border-bottom: 1px solid var(--line-2); }
.standards td:first-child { width: 30%; font-weight: 600; font-family: var(--mono); font-size: 14px; }
.standards .src { display: block; font: 400 13px/1.5 var(--font); color: var(--muted); margin-top: 6px; }
.standards .src a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-2); }
.standards .src a:hover { text-decoration-color: currentColor; }
.standards .use { display: block; color: var(--ink-2); font-size: 14.5px; margin-top: 4px; }

/* ---------- contact ---------- */
.email-big { display: inline-block; font: 500 clamp(22px, 3.2vw, 40px)/1.1 var(--mono); letter-spacing: -0.03em; overflow-wrap: anywhere; }
.form { display: grid; gap: 18px; max-width: 640px; }
.form label { display: grid; gap: 6px; font-size: 14px; font-weight: 500; color: var(--ink-2); }
.form input, .form select, .form textarea { font: inherit; color: var(--ink); padding: 12px 14px; border: 1px solid var(--line-2); border-radius: var(--r-s); background: var(--white); width: 100%; transition: border-color .2s; }
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--ink); outline: none; }
.form textarea { min-height: 160px; resize: vertical; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; }
.form-foot small { color: var(--muted); font-size: 13px; }
.contact-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.info-list { list-style: none; margin: 0; padding: 0; display: grid; }
.info-list li { padding: 20px 0; border-top: 1px solid var(--line-2); display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 10px; }
.info-list li:last-child { border-bottom: 1px solid var(--line-2); }
.info-list h3 { font-size: 18px; margin-bottom: 4px; }
.info-list p { margin: 0; color: var(--ink-2); font-size: 15.5px; }

/* ---------- dark section (contact) ---------- */
.section-dark { background: var(--dark); color: #fff; }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark p, .section-dark .info-list p, .section-dark address { color: rgba(255, 255, 255, .72); }
.section-dark .info-list li { border-color: rgba(255, 255, 255, .22); }
.section-dark .info-list .num, .section-dark .list-heading, .section-dark .form-foot small { color: rgba(255, 255, 255, .55); }
.section-dark .form label { color: rgba(255, 255, 255, .8); }
.section-dark .form input, .section-dark .form select, .section-dark .form textarea { background: var(--dark-2); color: #fff; border-color: rgba(255, 255, 255, .22); }
.section-dark .form input::placeholder, .section-dark .form textarea::placeholder { color: rgba(255, 255, 255, .4); }
.section-dark .form input:focus, .section-dark .form select:focus, .section-dark .form textarea:focus { border-color: #fff; }
.section-dark .form select option { color: var(--ink); }
.section-dark .btn { background: #fff; color: var(--ink); border-color: #fff; }
.section-dark .btn:hover { background: var(--paper); border-color: var(--paper); }
.section-dark .u { color: #fff; }

/* ---------- dark band ---------- */
.band { background: var(--dark); color: #fff; padding: clamp(64px, 9vw, 128px) 0; overflow: hidden; }
.band-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: clamp(32px, 5vw, 80px); align-items: center; }
.band h2 { color: #fff; }
.band p:not(.kicker) { color: rgba(255, 255, 255, .72); max-width: 50ch; }
.band .email-big { color: #fff; margin: 8px 0 28px; background-image: linear-gradient(#fff, #fff); background-repeat: no-repeat; background-size: 0% 1px; background-position: 0 100%; transition: background-size .4s var(--ease); }
.band .email-big:hover { background-size: 100% 1px; }
.band .art { max-width: 460px; justify-self: end; }
.band .btn-light { margin-right: 12px; }
.band .btn-ghost { color: #fff; border-color: rgba(255, 255, 255, .35); }
.band .btn-ghost:hover { background: #fff; color: var(--ink); border-color: #fff; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: clamp(48px, 6vw, 80px) 0 28px; font-size: 15px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .mark { height: 44px; }
.footer-brand p { color: var(--muted); margin: 20px 0 0; max-width: 26ch; }
.footer-heading { font: 500 13px/1.4 var(--mono); color: var(--muted); margin: 0 0 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer ul a { background-image: linear-gradient(currentColor, currentColor); background-repeat: no-repeat; background-size: 0% 1px; background-position: 0 100%; transition: background-size .3s var(--ease); }
.site-footer ul a:hover { background-size: 100% 1px; }
.site-footer address { font-style: normal; line-height: 1.7; color: var(--ink-2); }
.footer-email { font-weight: 500; overflow-wrap: anywhere; font-family: var(--mono); font-size: 14px; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.footer-bottom .mono { font-size: 12px; }

/* ---------- without JavaScript: show every panel, hide the controls that need it ---------- */
html:not(.js) .cap-panel[hidden], html:not(.js) .aud-panel[hidden] { display: grid; }
html:not(.js) .cap-panel + .cap-panel, html:not(.js) .aud-panel + .aud-panel { margin-top: clamp(40px, 5vw, 64px); padding-top: clamp(40px, 5vw, 64px); border-top: 1px solid var(--line-2); }
html:not(.js) .tabs, html:not(.js) .seg-row, html:not(.js) .chips { display: none; }
html:not(.js) .explorer { grid-template-columns: minmax(0, 1fr); }

/* ---------- motion ---------- */
.js [data-reveal] { opacity: 0; transform: translateY(12px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js [data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .js [data-reveal], .js.loading .hero-copy > *, .js.loading .hero-art { opacity: 1; transform: none; }
  .js.loading .brand .mark { clip-path: none; }
  .hero-art img { transform: none !important; }
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .devgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-art { max-width: 400px; justify-self: start; }
  .liti-grid, .process-grid, .shelf-grid, .explorer, .capnav-grid, .std-grid, .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .sticky { position: static; }
  .liti-copy .art, .process-copy .art { display: none; }
  .tabs { display: flex; overflow-x: auto; gap: 8px; border-top: 0; padding-bottom: 8px; scroll-snap-type: x proximity; scrollbar-width: none; }
  .tabs::-webkit-scrollbar { display: none; }
  .tabs li { flex: 0 0 auto; scroll-snap-align: start; }
  .tab { display: inline-flex; gap: 10px; padding: 10px 16px; border: 1px solid var(--line-2); border-radius: 999px; font-size: 14.5px; }
  .tab::before { display: none; }
  .tab[aria-selected="true"] { padding-left: 16px; background: var(--ink); color: #fff; border-color: var(--ink); }
  .tab[aria-selected="true"] .num { color: rgba(255, 255, 255, .7); }
  .panel-wrap { min-height: 0; margin-top: 24px; }
  .capnav { display: flex; overflow-x: auto; gap: 4px; border-left: 0; border-bottom: 1px solid var(--line-2); margin-bottom: 32px; scrollbar-width: none; }
  .capnav::-webkit-scrollbar { display: none; }
  .capnav li { flex: 0 0 auto; }
  .capnav a { display: inline-flex; padding: 10px 14px 12px; white-space: nowrap; }
  .capnav a::before { left: 0; right: 0; top: auto; bottom: -1px; width: auto; height: 2px; transform: scaleX(0); }
  .capnav a.is-current::before { transform: scaleX(1); }
  .std-nav { display: none; }
  .devgrid-2 .dev { padding-right: 150px; }
  .devgrid-2 .dev .art { width: 120px; }
  .standards td:first-child { width: 38%; }
}
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--gutter) 24px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 16px 32px rgba(0, 0, 0, .06); }
  .nav-open .site-nav { display: flex; }
  .site-nav ul { flex-direction: column; gap: 0; }
  .site-nav a:not(.btn) { display: block; padding: 14px 0; font-size: 18px; background: none; border-bottom: 1px solid var(--line); }
  .site-nav a:not(.btn)[aria-current="page"] { font-weight: 600; }
  .site-nav .btn { margin-top: 16px; padding: 14px 20px; font-size: 16px; }
  .nav-open { overflow: hidden; }
}
@media (max-width: 760px) {
  .split, .prose-grid, .band-grid, .detail, .panel, .cap-panel, .aud-panel { grid-template-columns: minmax(0, 1fr); }
  .cap-panel .art { max-width: 300px; justify-self: start; order: -1; }
  .aud-art { order: -1; }
  .aud-art .art { max-width: 300px; }
  .detail-art { max-width: 320px; justify-self: start; order: -1; }
  .panel:nth-child(even) > .panel-art, .panel-art { order: -1; }
  .band .art { max-width: 300px; justify-self: start; order: -1; }
  .trio { grid-template-columns: 1fr; gap: 28px; }
  .checklist-2, .directory-2 { grid-template-columns: 1fr; }
  .directory-2 > div:nth-child(2) { border-top: 1px solid var(--line-2); padding-top: 14px; }
  .form .row { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .devgrid, .devgrid-2 { grid-template-columns: minmax(0, 1fr); }
  .dev { min-height: 0; }
  .dev .art, .devgrid-2 .dev .art { position: static; width: 96px; margin: -4px 0 8px auto; }
  .dev h3, .devgrid-2 .dev h3 { padding-right: 0; }
  .devgrid-2 .dev { padding: 24px; }
  .seg { flex-wrap: wrap; border-radius: 20px; }
  .shelf, .shelf-6 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-art { max-width: 300px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .standards thead { display: none; }
  .standards tr, .standards td { display: block; width: auto !important; }
  .standards td { padding: 4px 0; border: 0; }
  .standards tr { padding: 16px 0; border-bottom: 1px solid var(--line-2); display: block; }
  .steps { padding-left: 32px; }
  .step::before { left: -29px; }
}
@media (max-width: 420px) {
  .shelf, .shelf-6 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .book h3 { font-size: 16px; }
}

/* ---------- print ---------- */
@media print {
  .site-header, .skip-link, .band, .actions, .chips, .seg-row { display: none !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
  .art { max-width: 200px; }
  .cap-panel[hidden], .aud-panel[hidden], .dev[hidden] { display: grid !important; }
  .cover { transform: none; box-shadow: none; }
}

/* ---- Rev 2.1: standards band, device explorer, lead form (from the clarity prototype) */
.std-band .section-head p { color: rgba(255, 255, 255, .72); }
.std-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid rgba(255, 255, 255, .22); }
.std-list li { padding: 22px 24px 26px 0; border-bottom: 1px solid rgba(255, 255, 255, .22); display: grid; gap: 8px; }
.std-list b { font: 500 15px/1.3 var(--mono); color: #fff; }
.std-list span { color: rgba(255, 255, 255, .72); font-size: 15px; line-height: 1.5; }
@media (max-width: 860px) { .std-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .std-list { grid-template-columns: 1fr; } }
.std-band .link { color: #fff; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.lead-grid { display: grid; grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
@media (max-width: 860px) { .lead-grid { grid-template-columns: 1fr; } }
.lead-wrap { background: var(--white); border: 1px solid var(--line); border-radius: var(--r); padding: clamp(24px, 4vw, 48px); box-shadow: var(--shadow); }
.lead-progress { height: 3px; background: var(--line); border-radius: 3px; margin-bottom: clamp(24px, 3vw, 36px); overflow: hidden; }
.lead-progress i { display: block; height: 100%; width: 0; background: var(--red); transition: width .35s var(--ease); }
.lead fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.lead fieldset[hidden] { display: none; }
.lead legend { padding: 0; margin-bottom: 24px; display: grid; gap: 12px; }
.lead legend .num { font: 500 13px/1.4 var(--mono); color: var(--muted); }
.lead legend .q { font-size: clamp(26px, 3.2vw, 38px); font-weight: 500; letter-spacing: -0.03em; line-height: 1.15; color: var(--ink); }
.js .lead .step-card:not([hidden]) { animation: panel-in .35s var(--ease) both; }
.lead .opts { display: grid; gap: 10px; }
.lead .opt { text-align: left; font: 500 17px var(--font); padding: 16px 18px; border: 1px solid var(--line-2); border-radius: 12px; background: var(--white); color: var(--ink); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: border-color .15s, transform .2s var(--ease), background .15s; }
.lead .opt::after { content: "→"; color: var(--muted); }
.lead .opt:hover { border-color: var(--ink); transform: translateX(2px); }
.lead .opt.sel { border-color: var(--ink); background: var(--paper); }
.lead .lbl { display: block; font: 500 13px/1.4 var(--mono); color: var(--muted); margin: 0 0 8px; }
.lead input, .lead textarea { width: 100%; font: 400 17px/1.5 var(--font); padding: 14px 16px; border: 1px solid var(--line-2); border-radius: 12px; background: var(--white); color: var(--ink); margin-bottom: 16px; }
.lead input:focus, .lead textarea:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px rgba(224, 60, 49, .25); }
.lead textarea { resize: vertical; min-height: 140px; }
.lead .next-btn { margin-top: 4px; }
.btn-red { background: var(--red); border-color: var(--red); color: #fff; }
.btn-red:hover { background: #c7342a; border-color: #c7342a; }
.lead-sum { list-style: none; margin: 0 0 28px; padding: 0; border-top: 1px solid var(--line); }
.lead-sum li { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15.5px; }
.lead-sum li span { font: 500 13px/1.6 var(--mono); color: var(--muted); }
.lead-sum li b { font-weight: 500; white-space: pre-wrap; overflow-wrap: anywhere; }
@media (max-width: 520px) { .lead-sum li { grid-template-columns: 1fr; gap: 2px; } }
.lead .fine { font-size: 13px; color: var(--muted); margin-top: 14px; }
.lead-err { color: var(--red); margin-top: 14px; }
.lead-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 28px; font: 500 13px/1.4 var(--mono); color: var(--muted); min-height: 32px; }
.lead-nav button { background: none; border: 0; color: var(--ink-2); font: 500 14px var(--font); cursor: pointer; padding: 6px 0; }
.lead-nav button:hover { color: var(--ink); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }