@font-face {
  font-family: "Instrument Sans";
  src: url("assets/instrument-display-680.woff2") format("woff2");
  font-style: normal;
  font-weight: 680;
  font-stretch: 88%;
  font-display: swap;
}

@font-face {
  font-family: "Instrument Sans";
  src: url("assets/instrument-heading-560.woff2") format("woff2");
  font-style: normal;
  font-weight: 560;
  font-stretch: 94%;
  font-display: swap;
}

@font-face {
  font-family: "Instrument Sans";
  src: url("assets/instrument-accent-420.woff2") format("woff2");
  font-style: normal;
  font-weight: 420;
  font-stretch: 100%;
  font-display: swap;
}

:root {
  --ink: #0b1717;
  --ink-2: #152423;
  --paper: #f4f2eb;
  --paper-2: #e8e4d9;
  --white: #fffef9;
  --muted: #59615c;
  --line: rgba(11, 23, 23, .16);
  --cyan: #38c6d9;
  --cyan-dark: #055f6b;
  --forest: #183e36;
  --blue: #1754c9;
  --red: #e74a38;
  --radius: 1.35rem;
  --shell: min(1360px, calc(100vw - 80px));
  --font: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --display: "Instrument Sans", "Arial Narrow", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 16px; line-height: 1.55; text-rendering: optimizeLegibility; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }
button { color: inherit; }
::selection { background: var(--cyan); color: var(--ink); }

.shell { width: var(--shell); margin-inline: auto; }
.manifest, .diagnosis, .keep-section, .concepts, .comparison, .next-step, .final-cta, .methodology, footer { content-visibility: auto; contain-intrinsic-size: auto 1000px; }
.skip-link { position: fixed; z-index: 200; top: .6rem; left: .6rem; transform: translateY(-150%); background: var(--white); color: var(--ink); padding: .8rem 1rem; border-radius: .5rem; font-weight: 700; }
.skip-link:focus { transform: none; }

.topbar { position: fixed; z-index: 100; inset: 0 0 auto; min-height: 74px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 2rem; padding: 0 max(2.5rem, calc((100vw - 1360px) / 2)); color: white; background: rgba(7, 18, 18, .82); border-bottom: 1px solid rgba(255,255,255,.14); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: .7rem; width: max-content; text-decoration: none; font-weight: 750; letter-spacing: -.03em; }
.brand > span:last-child > span { color: var(--cyan); }
.brand-mark { width: 27px; height: 26px; display: grid; grid-template-columns: repeat(3, 1fr); align-items: end; gap: 2px; }
.brand-mark i { display: block; background: currentColor; border-radius: 1px 1px 0 0; }
.brand-mark i:nth-child(1) { height: 42%; }
.brand-mark i:nth-child(2) { height: 72%; }
.brand-mark i:nth-child(3) { height: 100%; background: var(--cyan); }
.topbar nav { display: flex; gap: 2rem; }
.topbar nav a { color: rgba(255,255,255,.72); text-decoration: none; font-size: .82rem; font-weight: 650; transition: color .2s ease; }
.topbar nav a:hover, .topbar nav a:focus-visible { color: white; }
.top-cta { justify-self: end; display: inline-flex; align-items: center; gap: .65rem; padding: .7rem 1rem; border: 1px solid rgba(255,255,255,.32); border-radius: 999px; color: white; text-decoration: none; font-size: .82rem; font-weight: 700; }

.hero { position: relative; min-height: 100svh; display: flex; align-items: center; overflow: hidden; color: white; background: var(--ink); }
.hero-photo, .final-photo { position: absolute; inset: 0; background: url("assets/voyager-hero.webp") center 56% / cover no-repeat; transform: scale(1.02); }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,14,15,.94) 0%, rgba(4,14,15,.72) 48%, rgba(4,14,15,.24) 72%, rgba(4,14,15,.62) 100%), linear-gradient(0deg, rgba(4,14,15,.82), transparent 45%); }
.hero-layout { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1.24fr) minmax(330px, .66fr); gap: clamp(4rem, 8vw, 9rem); align-items: end; padding-block: 10rem 7.5rem; }
.overline { display: flex; flex-wrap: wrap; gap: .75rem 1.2rem; margin: 0 0 2.3rem; color: rgba(255,255,255,.68); font-size: .72rem; font-weight: 750; text-transform: uppercase; letter-spacing: .15em; }
.overline span:first-child { color: var(--cyan); }
h1, h2, h3 { margin: 0; font-family: var(--display); font-synthesis: none; font-weight: 560; font-stretch: 94%; line-height: .91; letter-spacing: -.06em; text-wrap: balance; }
.hero h1 { max-width: 1020px; font-size: clamp(3.7rem, 6.6vw, 7rem); font-weight: 680; font-stretch: 88%; letter-spacing: -.07em; }
h1 em, h2 em { color: var(--cyan); font-style: normal; font-weight: 420; font-stretch: 100%; letter-spacing: -.065em; }
.hero h1 br { display: none; }
.hero h1 em { display: block; max-width: 900px; margin-top: .08em; font-size: .82em; line-height: .96; }
.manifest h2 em, .concepts-intro h2 em, .comparison h2 em, .next-grid h2 em { color: var(--cyan-dark); }
.hero-lead { max-width: 720px; margin: 2.2rem 0 0; color: rgba(255,255,255,.8); font-size: clamp(1.05rem, 1.4vw, 1.28rem); line-height: 1.62; }
.hero-actions, .final-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem; margin-top: 2.4rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: .82rem 1.2rem; border: 1px solid transparent; border-radius: 999px; text-decoration: none; font-size: .88rem; font-weight: 750; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--cyan); outline-offset: 4px; }
.button-light { background: white; color: var(--ink); }
.button-quiet { color: white; border-color: rgba(255,255,255,.35); background: rgba(8,19,19,.16); }
.button-dark { color: white; background: var(--ink); }
.button-accent { color: var(--ink); background: var(--cyan); }
.hero-note { display: flex; align-items: center; gap: .6rem; margin: 1.35rem 0 0; color: rgba(255,255,255,.58); font-size: .78rem; }
.hero-note span { color: #8dd48c; font-size: .58rem; }
.hero-card { padding: 1.7rem; border: 1px solid rgba(255,255,255,.23); border-radius: var(--radius); background: rgba(8,22,22,.66); box-shadow: 0 28px 80px rgba(0,0,0,.28); backdrop-filter: blur(18px); }
.card-kicker, .eyebrow, .section-index { margin: 0; font-size: .7rem; font-weight: 800; text-transform: uppercase; letter-spacing: .16em; }
.card-kicker { color: var(--cyan); }
.hero-card blockquote { margin: 1rem 0 2.2rem; font-family: var(--display); font-size: clamp(1.25rem, 2vw, 1.7rem); font-weight: 420; font-stretch: 100%; line-height: 1.24; letter-spacing: -.035em; }
.hero-card-grid { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid rgba(255,255,255,.14); border-radius: .8rem; overflow: hidden; }
.hero-card-grid div { padding: 1rem; min-height: 98px; border-right: 1px solid rgba(255,255,255,.12); border-bottom: 1px solid rgba(255,255,255,.12); }
.hero-card-grid div:nth-child(even) { border-right: 0; }
.hero-card-grid div:nth-child(n+3) { border-bottom: 0; }
.hero-card-grid strong { display: block; font-size: 1.55rem; color: var(--cyan); line-height: 1; }
.hero-card-grid span { display: block; margin-top: .55rem; color: rgba(255,255,255,.58); font-size: .7rem; line-height: 1.25; }
.scroll-cue { position: absolute; z-index: 4; bottom: 1.8rem; left: 50%; transform: translateX(-50%); display: flex; align-items: center; gap: .7rem; color: rgba(255,255,255,.56); text-decoration: none; font-size: .68rem; text-transform: uppercase; letter-spacing: .14em; }
.scroll-cue span { width: 34px; height: 1px; background: var(--cyan); }

.manifest { padding: 9rem 0 7rem; }
.manifest-grid { display: grid; grid-template-columns: 170px minmax(0, 1.1fr) minmax(280px, .65fr); gap: 2.5rem; align-items: start; }
.section-index { color: var(--cyan-dark); }
.eyebrow { color: var(--cyan-dark); margin-bottom: 1.15rem; }
.manifest h2, .section-heading h2, .concepts-intro h2, .recommendation h2, .next-grid h2, .final-copy h2 { font-size: clamp(2.8rem, 5.2vw, 5.8rem); font-weight: 560; }
.manifest-copy, .section-heading > p, .concepts-intro > p:last-child, .next-grid > div > p:last-child { margin: 2.2rem 0 0; color: var(--muted); font-size: 1.06rem; line-height: 1.75; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 5rem; }
.value-card { position: relative; min-height: 330px; display: flex; flex-direction: column; padding: 1.7rem; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.36); overflow: hidden; }
.value-card::after { content: ""; position: absolute; right: -3rem; bottom: -4rem; width: 11rem; height: 11rem; border: 1px solid rgba(8,125,141,.18); border-radius: 50%; }
.value-card > span, .concept-outcomes span { color: var(--cyan-dark); font-size: .72rem; font-weight: 800; letter-spacing: .14em; }
.value-card h3 { margin-top: 3.8rem; font-size: 1.8rem; font-weight: 560; line-height: 1; }
.value-card p { color: var(--muted); }
.value-card b { margin-top: auto; max-width: 90%; font-size: .83rem; line-height: 1.45; }

.diagnosis { padding: 8rem 0 9rem; color: white; background: var(--ink); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(300px, .54fr); align-items: end; gap: 5rem; }
.section-heading .section-index { margin-bottom: 3.4rem; }
.diagnosis .section-heading .eyebrow, .diagnosis .section-heading .section-index { color: var(--cyan); }
.diagnosis .section-heading > p { color: rgba(255,255,255,.56); }
.diagnosis-layout { display: grid; grid-template-columns: minmax(0, .9fr) minmax(420px, 1.1fr); gap: clamp(3rem, 7vw, 7rem); align-items: start; margin-top: 5rem; }
.source-browser { position: sticky; top: 104px; margin: 0; }
.source-browser figcaption { height: 47px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1rem; padding: 0 1rem; color: var(--ink); background: #d9dcd8; border-radius: .8rem .8rem 0 0; font-size: .7rem; }
.source-browser figcaption > span { display: flex; gap: .32rem; }
.source-browser figcaption i { width: 8px; height: 8px; display: block; border-radius: 50%; background: #a9aeaa; }
.source-browser figcaption b { text-align: center; }
.source-browser figcaption a { color: var(--cyan-dark); font-weight: 750; text-decoration: none; }
.source-window { height: min(62vh, 590px); overflow: hidden; background: #eee; border: 1px solid rgba(255,255,255,.16); border-top: 0; }
.source-window img { width: 100%; height: auto; }
.source-browser > p { margin: 1rem 0 0; padding-left: 1rem; border-left: 2px solid var(--cyan); color: rgba(255,255,255,.55); font-size: .78rem; }
.findings { border-top: 1px solid rgba(255,255,255,.15); }
.finding { display: grid; grid-template-columns: 64px 1fr; gap: 1.2rem; padding: 2rem 0; border-bottom: 1px solid rgba(255,255,255,.15); }
.finding-no { color: var(--cyan); font-size: .72rem; font-weight: 800; letter-spacing: .15em; }
.finding div > p:first-child { margin: 0 0 .65rem; color: rgba(255,255,255,.7); font-size: .68rem; font-weight: 800; text-transform: uppercase; letter-spacing: .14em; }
.finding h3 { font-size: clamp(1.5rem, 2.5vw, 2.45rem); font-weight: 560; line-height: .98; letter-spacing: -.04em; }
.finding div > p:not(:first-child) { color: rgba(255,255,255,.62); }
.finding b { display: block; padding-left: 1rem; border-left: 2px solid var(--cyan); color: rgba(255,255,255,.85); font-size: .85rem; font-weight: 650; }

.keep-section { padding: 8rem 0; background: var(--cyan); }
.keep-grid { display: grid; grid-template-columns: minmax(300px, .8fr) minmax(460px, 1.2fr); gap: 8vw; }
.keep-grid .section-index, .keep-grid .eyebrow { color: rgba(11,23,23,.86); }
.keep-grid h2 { margin-top: 4rem; font-size: clamp(2.8rem, 5vw, 5.4rem); }
.keep-grid > div > p:last-child { max-width: 500px; margin-top: 1.6rem; }
.keep-grid ul { list-style: none; margin: 0; padding: 0; border-top: 1px solid rgba(11,23,23,.25); }
.keep-grid li { display: grid; grid-template-columns: 56px 1fr; gap: 1rem; padding: 1.35rem 0; border-bottom: 1px solid rgba(11,23,23,.25); }
.keep-grid li > span { font-size: .7rem; font-weight: 800; }
.keep-grid li b { font-size: 1.1rem; }
.keep-grid li p { margin: .35rem 0 0; color: rgba(11,23,23,.8); }

.concepts { padding-top: 9rem; background: var(--paper); }
.concepts-intro { max-width: 1100px; text-align: center; }
.concepts-intro .section-index { margin-bottom: 4rem; }
.concepts-intro > p:last-child { max-width: 780px; margin-inline: auto; }
.concept-switcher { position: sticky; z-index: 35; top: 74px; display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 4.5rem; background: var(--paper); border: 1px solid var(--line); border-radius: 1rem; overflow: hidden; box-shadow: 0 14px 30px rgba(17,32,31,.08); }
.concept-switcher button { display: grid; grid-template-columns: 36px 1fr; grid-template-rows: auto auto; gap: .1rem .7rem; padding: 1rem 1.2rem; border: 0; border-right: 1px solid var(--line); background: transparent; text-align: left; cursor: pointer; }
.concept-switcher button:last-child { border-right: 0; }
.concept-switcher button > span { grid-row: 1 / 3; align-self: center; display: grid; place-items: center; width: 32px; height: 32px; border: 1px solid var(--line); border-radius: 50%; font-weight: 800; }
.concept-switcher button b { line-height: 1.2; }
.concept-switcher button small { color: var(--muted); }
.concept-switcher button.is-active { color: white; background: var(--ink); }
.concept-switcher button.is-active span { color: var(--ink); background: var(--cyan); border-color: var(--cyan); }
.concept-switcher button.is-active small { color: rgba(255,255,255,.56); }
.concept-stage { margin-top: 2rem; }
.concept-panel { padding: 6rem 0 7rem; }
.concept-panel[data-panel="a"] { --accent: var(--cyan); --stage: #dfe7e6; }
.concept-panel[data-panel="b"] { --accent: #c8aa72; --stage: #e8e0d1; }
.concept-panel[data-panel="c"] { --accent: var(--red); --stage: #e3e1d8; }
.concept-header { display: grid; grid-template-columns: minmax(360px, .8fr) minmax(440px, 1.2fr); gap: 8vw; align-items: end; }
.concept-label { display: flex; align-items: center; gap: .8rem; margin: 0 0 1.2rem; color: var(--muted); font-size: .7rem; font-weight: 800; text-transform: uppercase; letter-spacing: .14em; }
.concept-label span { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; color: var(--ink); background: var(--accent); }
.concept-header h3 { font-size: clamp(3.3rem, 6.5vw, 7.4rem); font-weight: 680; font-stretch: 88%; line-height: .89; }
.concept-quote { margin: 0 0 2.2rem; padding-left: 1.4rem; border-left: 3px solid var(--accent); font-family: var(--display); font-size: clamp(1.25rem, 2.2vw, 2rem); font-weight: 420; font-stretch: 100%; line-height: 1.25; letter-spacing: -.035em; }
.benefit-list { border-top: 1px solid var(--line); }
.benefit-list p { display: grid; grid-template-columns: 155px 1fr; gap: 1rem; margin: 0; padding: .85rem 0; border-bottom: 1px solid var(--line); color: var(--muted); }
.benefit-list b { color: var(--ink); }
.mockup-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, 30%); gap: 2rem; align-items: start; margin-top: 5rem; padding: 2rem; border-radius: 1.5rem; background: var(--stage); }
.mockup { margin: 0; border-radius: .8rem; overflow: hidden; box-shadow: 0 32px 75px rgba(25,32,31,.18); background: white; }
.mockup figcaption { display: flex; justify-content: space-between; align-items: center; height: 44px; padding: 0 .9rem; color: var(--ink); background: white; border-bottom: 1px solid var(--line); font-size: .7rem; font-weight: 750; text-transform: uppercase; letter-spacing: .1em; }
.mockup figcaption button { border: 0; padding: .3rem; color: var(--cyan-dark); background: transparent; cursor: pointer; text-transform: none; letter-spacing: normal; }
.desktop-mockup img { width: 100%; height: auto; }
.mobile-mockup { padding-bottom: 1.2rem; background: #252d2d; }
.mobile-mockup figcaption { margin-bottom: 1.2rem; }
.phone-frame { width: calc(100% - 2.4rem); margin: 0 auto; border: 7px solid #090d0d; border-radius: 1.25rem; overflow: hidden; }
.phone-frame img { width: 100%; height: auto; }
.concept-outcomes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2rem; }
.concept-outcomes article { padding: 1.5rem; border: 1px solid var(--line); border-radius: 1rem; background: rgba(255,255,255,.42); }
.concept-outcomes b { display: block; margin-top: 2.6rem; font-size: 1.08rem; }
.concept-outcomes p { margin-bottom: 0; color: var(--muted); font-size: .9rem; }
.choose-row { display: flex; justify-content: space-between; align-items: center; gap: 2rem; margin-top: 2rem; padding: 1.4rem 1.5rem; border-radius: 1rem; color: white; background: var(--ink); }
.choose-row p { margin: 0; color: rgba(255,255,255,.65); font-size: .85rem; }
.choose-row p b { color: white; }
.choose-row .button { background: var(--accent); color: var(--ink); white-space: nowrap; }

.comparison { padding: 9rem 0; background: var(--white); }
.comparison .section-heading .section-index { margin-bottom: 3.2rem; }
.compare-table { margin-top: 4.5rem; border-top: 1px solid var(--line); }
.compare-row { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); border-bottom: 1px solid var(--line); }
.compare-row > * { padding: 1.15rem; border-right: 1px solid var(--line); }
.compare-row > *:last-child { border-right: 0; }
.compare-row span { color: var(--muted); }
.compare-row b { font-size: .9rem; }
.compare-head { background: var(--ink); color: white; }
.compare-head span { color: rgba(255,255,255,.55); }
.compare-row .best { color: var(--cyan-dark); background: rgba(56,198,217,.1); }
.compare-head .best { color: white; background: none; }
.recommendation { display: grid; grid-template-columns: 190px minmax(0, 1fr) auto; gap: 3rem; align-items: center; margin-top: 3rem; padding: 3rem; border-radius: 1.4rem; color: white; background: var(--ink); }
.recommendation-mark { display: grid; place-items: center; aspect-ratio: 1; border: 1px solid rgba(255,255,255,.18); border-radius: 50%; }
.recommendation-mark span { font-size: 5rem; line-height: 1; color: var(--cyan); }
.recommendation-mark small { margin-top: -3rem; color: rgba(255,255,255,.48); text-transform: uppercase; letter-spacing: .13em; }
.recommendation .eyebrow { color: var(--cyan); }
.recommendation h2 { font-size: clamp(2.5rem, 4vw, 4.5rem); }
.recommendation p, .recommendation li { color: rgba(255,255,255,.66); }
.recommendation ul { margin: 1.4rem 0 0; padding-left: 1.2rem; }
.recommendation .button { white-space: nowrap; }

.next-step { padding: 9rem 0; }
.next-grid { display: grid; grid-template-columns: minmax(0, .88fr) minmax(460px, 1.12fr); gap: 8vw; }
.next-grid .section-index { margin-bottom: 4rem; }
.next-grid ol { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.next-grid li { display: grid; grid-template-columns: 60px 1fr; gap: 1rem; padding: 1.4rem 0; border-bottom: 1px solid var(--line); }
.next-grid li > span { color: var(--cyan-dark); font-size: .72rem; font-weight: 800; }
.next-grid li b { font-size: 1.15rem; }
.next-grid li p { margin: .4rem 0 0; color: var(--muted); }

.final-cta { position: relative; min-height: 82svh; display: grid; align-items: end; overflow: hidden; color: white; background: var(--ink); }
.final-photo { background-position: center 62%; }
.final-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5,17,17,.92), rgba(5,17,17,.35) 70%), linear-gradient(0deg, rgba(5,17,17,.92), transparent 55%); }
.final-copy { position: relative; z-index: 2; max-width: 990px; margin-left: max(40px, calc((100vw - 1360px) / 2)); padding-block: 8rem 6rem; }
.final-copy .eyebrow { color: var(--cyan); }
.final-copy p:not(.eyebrow) { max-width: 720px; color: rgba(255,255,255,.72); font-size: 1.08rem; }

.methodology { padding: 2.5rem 0; color: white; background: var(--ink); border-top: 1px solid rgba(255,255,255,.14); }
.methodology-inner { display: grid; grid-template-columns: 1fr auto; align-items: start; gap: 2rem; }
.methodology details { max-width: 880px; }
.methodology summary { list-style: none; display: flex; justify-content: space-between; cursor: pointer; font-weight: 700; }
.methodology summary::-webkit-details-marker { display: none; }
.methodology summary span { color: var(--cyan); font-size: 1.25rem; }
.method-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-top: 1.5rem; color: rgba(255,255,255,.56); font-size: .82rem; }
.downloads { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .8rem; }
.downloads a { color: rgba(255,255,255,.62); font-size: .74rem; text-underline-offset: 4px; }

footer { padding: 2.2rem 0; color: white; background: #061010; }
.footer-grid { display: grid; grid-template-columns: 1fr 2fr 1fr; align-items: center; gap: 2rem; }
.footer-grid p { margin: 0; color: rgba(255,255,255,.62); font-size: .72rem; text-align: center; }
.footer-grid > a:last-child { justify-self: end; color: var(--cyan); font-size: .8rem; font-weight: 700; text-decoration: none; }

.image-dialog { width: min(1080px, calc(100vw - 48px)); max-height: 92vh; padding: 0; border: 0; border-radius: 1rem; background: var(--ink); box-shadow: 0 40px 120px rgba(0,0,0,.5); overflow: auto; }
.image-dialog::backdrop { background: rgba(1,7,7,.86); backdrop-filter: blur(8px); }
.image-dialog img { width: 100%; height: auto; }
.dialog-close { position: fixed; z-index: 2; top: 5vh; right: max(4vw, 2rem); width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.5); border-radius: 50%; color: white; background: rgba(11,23,23,.8); font-size: 1.55rem; line-height: 1; cursor: pointer; }

.error-page { min-height: 100svh; display: grid; place-items: center; padding: 2rem; background: radial-gradient(circle at 80% 10%, rgba(56,198,217,.25), transparent 34%), var(--paper); }
.error-page > div { max-width: 760px; }
.error-page h1 { font-size: clamp(3rem, 8vw, 7rem); }
.error-page p:not(.eyebrow) { max-width: 580px; margin: 1.5rem 0 2rem; color: var(--muted); font-size: 1.1rem; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  :root { --shell: min(100% - 48px, 960px); }
  .topbar { padding-inline: 24px; }
  .topbar nav { display: none; }
  .hero-layout { grid-template-columns: 1fr; gap: 3rem; padding-top: 9rem; }
  .hero-card { max-width: 640px; }
  .manifest-grid { grid-template-columns: 120px 1fr; }
  .manifest-copy { grid-column: 2; margin-top: 0; }
  .diagnosis-layout { grid-template-columns: 1fr; }
  .source-browser { position: relative; top: auto; max-width: 760px; }
  .keep-grid, .next-grid { grid-template-columns: 1fr; }
  .concept-header { grid-template-columns: 1fr; }
  .recommendation { grid-template-columns: 150px 1fr; }
  .recommendation > .button { grid-column: 2; justify-self: start; }
}

@media (max-width: 760px) {
  :root { --shell: calc(100% - 32px); }
  html { scroll-padding-top: 66px; }
  .topbar { min-height: 64px; grid-template-columns: 1fr auto; padding-inline: 16px; }
  .top-cta { padding: .6rem .85rem; }
  .topbar .brand { font-size: .88rem; }
  .topbar .brand-mark { width: 23px; height: 22px; }
  .hero { min-height: 960px; align-items: start; }
  .hero-photo { background-position: 64% center; }
  .hero-shade { background: linear-gradient(180deg, rgba(4,14,15,.92) 0%, rgba(4,14,15,.55) 48%, rgba(4,14,15,.93) 100%); }
  .hero-layout { padding: 8.5rem 0 5rem; gap: 2.4rem; }
  .overline { margin-bottom: 1.5rem; }
  .hero h1 { font-size: clamp(3.1rem, 14.5vw, 5rem); }
  .hero-lead { font-size: 1rem; }
  .hero-actions .button, .final-actions .button { width: 100%; }
  .scroll-cue { display: none; }
  .hero-card { padding: 1.2rem; }
  .manifest, .diagnosis, .concepts, .comparison, .next-step { padding-top: 6rem; }
  .manifest-grid, .section-heading, .keep-grid, .next-grid { grid-template-columns: 1fr; gap: 1.6rem; }
  .manifest-grid .section-index, .section-heading .section-index, .next-grid .section-index { margin-bottom: 2.5rem; }
  .manifest-copy { grid-column: auto; }
  .manifest h2, .section-heading h2, .concepts-intro h2, .recommendation h2, .next-grid h2, .final-copy h2 { font-size: clamp(2.6rem, 12vw, 4.1rem); }
  .value-grid { grid-template-columns: 1fr; margin-top: 3rem; }
  .value-card { min-height: 285px; }
  .diagnosis { padding-bottom: 6rem; }
  .diagnosis-layout { margin-top: 3rem; }
  .source-window { height: 430px; }
  .finding { grid-template-columns: 36px 1fr; }
  .keep-section { padding: 6rem 0; }
  .keep-grid h2 { margin-top: 2.5rem; }
  .concepts-intro { text-align: left; }
  .concepts-intro .section-index { margin-bottom: 2.5rem; }
  .concept-switcher { top: 64px; width: 100%; border-radius: 0; border-inline: 0; box-shadow: 0 10px 24px rgba(17,32,31,.1); }
  .concept-switcher button { grid-template-columns: 28px 1fr; padding: .8rem .5rem; gap: .1rem .35rem; }
  .concept-switcher button > span { width: 26px; height: 26px; font-size: .75rem; }
  .concept-switcher button b { font-size: .7rem; }
  .concept-switcher button small { display: none; }
  .concept-panel { padding-top: 4rem; }
  .concept-header { grid-template-columns: 1fr; gap: 2.5rem; }
  .concept-header h3 { font-size: clamp(3rem, 17vw, 5.2rem); }
  .benefit-list p { grid-template-columns: 1fr; gap: .2rem; }
  .mockup-grid { grid-template-columns: minmax(0, 1fr) minmax(112px, 33%); gap: .7rem; padding: .7rem; border-radius: 1rem; }
  .mockup figcaption { height: 37px; padding: 0 .55rem; font-size: .58rem; }
  .mockup figcaption button { font-size: .58rem; }
  .mobile-mockup { padding-bottom: .6rem; }
  .mobile-mockup figcaption { margin-bottom: .6rem; }
  .phone-frame { width: calc(100% - .7rem); border-width: 3px; border-radius: .55rem; }
  .concept-outcomes { grid-template-columns: 1fr; }
  .choose-row { align-items: stretch; flex-direction: column; }
  .compare-table { overflow-x: auto; }
  .compare-row { min-width: 690px; }
  .recommendation { grid-template-columns: 1fr; padding: 1.5rem; }
  .recommendation-mark { width: 125px; }
  .recommendation > .button { grid-column: auto; width: 100%; }
  .next-grid ol { margin-top: 2rem; }
  .final-cta { min-height: 780px; }
  .final-photo { background-position: 68% center; }
  .final-shade { background: linear-gradient(180deg, rgba(5,17,17,.3), rgba(5,17,17,.96) 70%); }
  .final-copy { width: var(--shell); margin-inline: auto; padding-block: 7rem 4rem; }
  .methodology-inner, .method-grid { grid-template-columns: 1fr; }
  .downloads { justify-content: flex-start; }
  .footer-grid { grid-template-columns: 1fr; text-align: left; }
  .footer-grid p { text-align: left; }
  .footer-grid > a:last-child { justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}