/* Resonance brand site — cream dossier / black stage / orange signal. */

:root {
  --paper: #F0EEE4;
  --paper-2: #E6E3D6;
  --ink: #0E0E0C;
  --ink-80: rgba(14,14,12,.8);
  --ink-60: rgba(14,14,12,.64);
  --ink-40: rgba(14,14,12,.42);
  --ink-20: rgba(14,14,12,.22);
  --hairline: rgba(14,14,12,.15);
  --stage: #0B0B0D;
  --stage-2: #141416;
  --grid-line: rgba(240,238,228,.05);
  --fog: #B9B6AC;
  --fog-60: rgba(185,182,172,.68);
  --fog-bright: #F0EEE4;
  --accent: #F15A24;
  --accent-ink: #7A2A0E;
  --accent-hover: #DA4C17;
  --ok: #1E7A4F;
  --danger: #B3261E;
  --warn: #8A6400;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --ease-silk: cubic-bezier(.22,1,.36,1);
  --dur-micro: 140ms;
  --dur-standard: 220ms;
  --dur-reveal: 400ms;
  --maxw: 1240px;
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font: 400 1rem/1.65 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; }
.svg-defs { position: absolute; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

section { padding: 120px 24px; position: relative; scroll-margin-top: 88px; }
.wrap { width: min(100%, var(--maxw)); margin-inline: auto; position: relative; z-index: 2; }
.stage {
  background-color: var(--stage);
  color: var(--fog);
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
}
.stage h1, .stage h2, .stage h3, .stage h4, .stage h5 { color: var(--fog-bright); }

h1, h2, h3, h4, h5 { font-family: var(--font-display); letter-spacing: -.025em; text-wrap: balance; }
h1 { font-size: clamp(3.2rem, 6.8vw, 6.9rem); font-weight: 700; line-height: .94; }
h2 { font-size: clamp(2.5rem, 5vw, 5rem); font-weight: 700; line-height: .98; }
h3 { font-size: clamp(1.5rem, 2.8vw, 2rem); font-weight: 500; line-height: 1.12; }
h4 { font-size: clamp(1.2rem, 2vw, 1.55rem); font-weight: 600; line-height: 1.2; }
h5 { font-size: 1.15rem; font-weight: 600; line-height: 1.2; }
p { max-width: 68ch; text-wrap: pretty; }
.lead { margin-top: 18px; color: var(--ink-60); font-size: clamp(1.05rem, 1.7vw, 1.25rem); line-height: 1.55; }
.stage .lead { color: var(--fog); }
.label, .mono {
  font: 500 .75rem/1.45 var(--font-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.label { color: var(--ink-60); display: block; margin-bottom: 18px; }
.stage .label { color: var(--fog); }

.stamp {
  display: inline-block;
  border: 1px solid currentColor;
  border-radius: 2px;
  padding: 5px 7px;
  font: 500 .72rem/1 var(--font-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.stamp.sim { color: var(--ink); }
.stage .stamp { color: var(--fog); }
.report-document .stamp.sim { color: var(--ink); }
.stamp.sample { color: var(--accent-ink); }
.stamps { display: flex; gap: 8px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 14px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font: 500 .78rem/1 var(--font-mono);
  letter-spacing: .07em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--dur-micro) var(--ease-silk), background-color var(--dur-micro) var(--ease-silk), border-color var(--dur-micro) var(--ease-silk);
}
.btn.primary { background: var(--accent); color: var(--ink); }
.btn.ghost { border-color: currentColor; color: var(--ink); }
.stage .btn.ghost { color: var(--fog-bright); }
.btn:active { transform: scale(.97); transition-duration: 100ms; }
.btn-row { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.tlink {
  color: var(--accent-ink);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
  transition: opacity var(--dur-micro) var(--ease-silk);
}
.stage .tlink { color: var(--accent); }
.tlink:active { opacity: .68; }

@media (hover: hover) and (pointer: fine) {
  .btn.primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
  .btn.ghost:hover { transform: translateY(-1px); }
  .tlink:hover { opacity: .72; }
}

/* navigation */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 15px 24px;
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur-standard) var(--ease-silk), border-color var(--dur-standard) var(--ease-silk), backdrop-filter var(--dur-standard) var(--ease-silk);
}
.nav.scrolled, .nav.menu-open {
  background: rgba(11,11,13,.94);
  border-bottom-color: rgba(240,238,228,.13);
  backdrop-filter: blur(8px) saturate(150%);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--fog-bright); text-decoration: none; }
.brand svg { width: 30px; height: 30px; }
.brand span { font: 500 1.18rem/1 var(--font-display); letter-spacing: -.03em; text-transform: lowercase; }
.links, .nav-menu { display: flex; align-items: center; gap: 20px; }
.nav-menu a {
  padding: 10px 2px;
  color: var(--fog);
  font: 500 .72rem/1 var(--font-mono);
  letter-spacing: .05em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color var(--dur-micro) var(--ease-silk);
}
.nav .links > .btn { color: var(--ink); }
.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}
.hamburger span {
  width: 20px;
  height: 2px;
  background: var(--fog-bright);
  transition: transform var(--dur-standard) var(--ease-silk), opacity var(--dur-standard) var(--ease-silk);
}
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 45;
  background: rgba(0,0,0,.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-standard) var(--ease-silk);
}
.nav.menu-open ~ .nav-scrim { opacity: 1; pointer-events: auto; }

@media (hover: hover) and (pointer: fine) { .nav-menu a:hover { color: var(--fog-bright); } }
@media (prefers-reduced-transparency: reduce) { .nav.scrolled, .nav.menu-open { background: var(--stage); backdrop-filter: none; } }
@media (prefers-contrast: more) { .nav.scrolled, .nav.menu-open { background: var(--stage); backdrop-filter: none; border-bottom-color: var(--fog-bright); } }

/* hero */
.hero { min-height: 100svh; display: flex; align-items: center; overflow: hidden; padding-top: 112px; padding-bottom: 70px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(360px, .88fr); gap: clamp(40px, 6vw, 88px); align-items: center; }
.hero-copy h1 { max-width: 12ch; }
.hero-benefit { margin-top: 26px; max-width: 47ch; color: var(--fog-bright); font-size: clamp(1.12rem, 2vw, 1.45rem); line-height: 1.45; }
.hero-visual { position: relative; min-height: 460px; display: grid; place-items: center; }
.hero-motif { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; }
.hero-cone { width: clamp(220px, 26vw, 330px); filter: drop-shadow(0 26px 54px rgba(241,90,36,.20)); }
.hero-wave { opacity: .5; }
.hero-wave { position: absolute; bottom: 4%; width: 100%; color: var(--fog); }

/* why now */
#why-now h2 { max-width: 17ch; }
.why-lead { max-width: 73ch; }
.layer-card { margin-top: 34px; padding: 22px; border: 1px solid var(--ink); border-radius: 12px; }
.layer-card + .layer-card { margin-top: 16px; }
.layer-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.layer-head h4 { font-size: 1.3rem; }

/* Message Lift comparison */
#message-lift { background: var(--paper-2); }
#message-lift h2 { max-width: 16ch; }

/* Graphic attribution and Message Lift scenes */
.attribution-scene { margin-top: 58px; padding: clamp(22px,4vw,46px); border: 1px solid var(--ink); border-radius: 14px; background: var(--paper-2); overflow: hidden; }
.scene-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; padding-bottom: 26px; border-bottom: 1px solid var(--hairline); }
.scene-head .mono { margin-bottom: 7px; color: var(--ink-60); }
.blind-spot-rail { list-style: none; display: grid; grid-template-columns: repeat(4,1fr); padding: 0; border-block: 1px solid var(--ink); }
.blind-spot-rail li { min-width: 0; padding: 15px 14px; font: 600 .73rem/1.35 var(--font-display); }
.blind-spot-rail li + li { border-left: 1px solid var(--ink); }
.blind-spot-rail span { display: block; margin-bottom: 7px; color: var(--accent-ink); font: 500 .61rem/1 var(--font-mono); }
.attribution-scene figcaption { margin-top: 20px; color: var(--ink-60); font-size: .84rem; }
.message-comparison { display: grid; grid-template-columns: minmax(0,1fr) 180px minmax(0,1fr); align-items: stretch; margin-top: 18px; padding: 0; }
.message-card { min-width: 0; padding: 18px; border: 1px solid var(--ink); background: var(--paper-2); }
.message-card .mono { color: var(--ink-60); }
.message-card p:last-child { margin-top: 16px; font: 600 1.05rem/1.35 var(--font-display); }
.message-card.is-new { border-top: 3px solid var(--accent); background: var(--paper); }
.message-card.is-new .mono { color: var(--accent-ink); }
.parity-connector { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 7px; padding: 12px; text-align: center; }
.parity-connector span { color: var(--accent-ink); font-size: 1.4rem; }
.parity-connector strong { color: var(--ink-60); font: 500 .58rem/1.5 var(--font-mono); text-transform: uppercase; }
.module-note { margin-top: 13px; color: var(--ink-60); font: 400 .62rem/1.45 var(--font-mono); }

/* sample report */
.report-stage { padding-top: 130px; }
.report-stage > .wrap > h2 { max-width: 16ch; }
.report-intro { max-width: 68ch; }
.report-shell { display: grid; grid-template-columns: 190px minmax(0,1fr); gap: 0; margin-top: 58px; align-items: start; }
.report-index { position: sticky; top: 88px; padding: 24px 24px 24px 0; color: var(--fog); }
.report-index-brand { margin-top: 22px; color: var(--fog-bright); font: 500 1.25rem/1 var(--font-display); }
.report-index > div > p:last-child { margin-top: 7px; color: var(--fog-60); font-size: .75rem; line-height: 1.45; }
.report-index nav { display: grid; margin-top: 32px; border-top: 1px solid rgba(240,238,228,.16); }
.report-index a { padding: 12px 0; border-bottom: 1px solid rgba(240,238,228,.16); color: var(--fog); font: 500 .7rem/1 var(--font-mono); text-decoration: none; text-transform: uppercase; letter-spacing: .06em; transition: color var(--dur-micro) var(--ease-silk), padding-left var(--dur-micro) var(--ease-silk); }
.report-document { min-width: 0; background: var(--paper); color: var(--ink); border-radius: 12px; overflow: clip; }
.report-document h3, .report-document h4, .report-document h5 { color: var(--ink); }
.report-cover { padding: clamp(28px, 5vw, 64px); border-bottom: 1px solid var(--hairline); }
.report-title-row, .report-section-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.report-title-row .mono { color: var(--ink-60); }
.report-title-row h3 { margin-top: 10px; font-size: clamp(2.4rem, 5vw, 5rem); }
.report-meta { display: grid; grid-template-columns: 1fr 1fr; margin-top: 42px; border-top: 2px solid var(--ink); }
.report-meta > div { padding: 14px 18px 14px 0; border-bottom: 1px solid var(--hairline); }
.report-meta > div:nth-child(even) { padding-left: 18px; border-left: 1px solid var(--hairline); }
.report-meta dt { color: var(--ink-60); font: 500 .66rem/1 var(--font-mono); text-transform: uppercase; letter-spacing: .07em; }
.report-meta dd { margin-top: 7px; font-size: .86rem; }
.report-findings { list-style: none; padding: 0; margin-top: 38px; }
.report-findings li { display: grid; grid-template-columns: 38px 1fr; gap: 16px; padding: 18px 0; border-top: 1px solid var(--hairline); }
.report-findings span { color: var(--accent-ink); font: 500 .72rem/1.5 var(--font-mono); }
.report-findings p { font-family: var(--font-display); font-size: clamp(1.05rem, 2vw, 1.3rem); line-height: 1.35; }
.report-section { padding: clamp(28px, 5vw, 56px); scroll-margin-top: 90px; border-bottom: 1px solid var(--hairline); }
.report-section-head .mono { color: var(--accent-ink); margin-bottom: 7px; }
.metric-card-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; margin-top: 30px; background: var(--ink); border: 1px solid var(--ink); }
.metric-card-grid article { min-width: 0; min-height: 142px; padding: 16px; background: var(--paper); display: flex; flex-direction: column; }
.metric-card-grid p { color: var(--ink-60); font: 500 .66rem/1.35 var(--font-mono); text-transform: uppercase; letter-spacing: .05em; }
.metric-card-grid strong { margin-top: auto; font: 700 2rem/1 var(--font-display); font-variant-numeric: tabular-nums; }
.metric-card-grid small { margin-top: 8px; color: var(--ink-60); font: 400 .66rem/1.35 var(--font-mono); }
.chart-grid { display: grid; gap: 18px; margin-top: 28px; }
.two-up { grid-template-columns: 1fr 1fr; }
.proof-grid { grid-template-columns: .9fr 1.1fr; }
.chart-panel, .table-wrap { min-width: 0; padding: 20px; border: 1px solid var(--hairline); border-radius: 12px; background: var(--paper-2); }
.chart-panel figcaption { display: flex; flex-direction: column; gap: 4px; }
.chart-panel figcaption strong { font-family: var(--font-display); font-size: 1rem; }
.chart-panel figcaption span { color: var(--ink-60); font: 400 .66rem/1.4 var(--font-mono); }
.bar-chart { list-style: none; padding: 0; margin-top: 22px; display: grid; gap: 12px; }
.bar-chart li { display: grid; grid-template-columns: minmax(86px,.7fr) minmax(90px,1fr) 42px; gap: 10px; align-items: center; font-size: .76rem; }
.bar-chart strong { text-align: right; font: 500 .72rem/1 var(--font-mono); font-variant-numeric: tabular-nums; }
.bar-track { display: block; height: 7px; background: var(--ink-20); overflow: hidden; }
.bar-fill { display: block; width: var(--value); height: 100%; transform-origin: left center; background: var(--ink-80); }
.bar-fill.client { background: var(--accent); }
.bar-fill.ink-2 { background: rgba(14,14,12,.72); }
.bar-fill.ink-3 { background: rgba(14,14,12,.58); }
.bar-fill.ink-4 { background: rgba(14,14,12,.46); }
.bar-fill.ink-5 { background: rgba(14,14,12,.32); }
.domains li { grid-template-columns: minmax(130px,1fr) minmax(75px,.8fr) 42px; }
.sentiment-bar { display: flex; width: 100%; min-height: 42px; margin-top: 38px; overflow: hidden; color: var(--paper); font: 500 .66rem/42px var(--font-mono); text-align: center; }
.sentiment-bar span { width: var(--value); min-width: 26px; }
.sentiment-bar .positive { background: var(--ok); }
.sentiment-bar .neutral { background: var(--ink-60); }
.sentiment-bar .negative { background: var(--danger); }
.sentiment-key { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin-top: 20px; }
.sentiment-key > div { border-top: 1px solid var(--hairline); padding-top: 10px; }
.sentiment-key dt { color: var(--ink-60); font-size: .7rem; }
.sentiment-key dd { margin-top: 3px; font: 500 .82rem/1 var(--font-mono); }
.data-table, .metric-table { width: 100%; border-collapse: collapse; }
.data-table caption { padding-bottom: 16px; text-align: left; font: 600 1rem/1.2 var(--font-display); }
.data-table th, .data-table td, .metric-table th, .metric-table td { padding: 12px 10px; border-top: 1px solid var(--hairline); text-align: left; vertical-align: top; }
.data-table thead th, .metric-table thead th { border-top: 0; color: var(--ink-60); font: 500 .66rem/1.4 var(--font-mono); text-transform: uppercase; letter-spacing: .06em; }
.data-table td { font-size: .76rem; }
.status { font: 500 .66rem/1 var(--font-mono); text-transform: uppercase; }
.status.warn { color: var(--warn); }
.status.danger { color: var(--danger); }
.lift-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 28px; }
.lift-card { min-width: 0; padding: 22px; border: 1px solid var(--ink); border-radius: 12px; }
.message-pair { margin-top: 22px; }
.message-pair > div { padding: 14px 0; border-top: 1px solid var(--hairline); }
.message-pair span { color: var(--accent-ink); font: 500 .66rem/1 var(--font-mono); text-transform: uppercase; }
.message-pair p { margin-top: 6px; font-family: var(--font-display); line-height: 1.35; }
.lift-results { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; margin-top: 22px; background: var(--ink); border: 1px solid var(--ink); }
.lift-results > div { min-width: 0; padding: 13px; background: var(--paper); }
.lift-results dt { min-height: 2.8em; color: var(--ink-60); font: 500 .62rem/1.4 var(--font-mono); text-transform: uppercase; }
.lift-results dd { margin-top: 9px; font: 700 1.45rem/1 var(--font-display); font-variant-numeric: tabular-nums; }
.lift-results.two-row { grid-template-columns: 1fr 1fr; }
.lift-results .wide { grid-column: 1 / -1; }
.report-note { margin-top: 18px; color: var(--ink-60); font: 400 .68rem/1.5 var(--font-mono); }

/* independent studies */
.case-stage { border-top: 1px solid rgba(240,238,228,.12); }
.case-stage h2 { max-width: 17ch; }
.disclosure { margin-top: 28px; padding: 18px 20px; border-left: 3px solid var(--accent); background: rgba(241,90,36,.1); }
.disclosure p { max-width: none; color: var(--fog-bright); font: 500 .8rem/1.55 var(--font-mono); }
.single-case { margin-top: 30px; }
.single-case .case { max-width: 780px; }
.sample-cta { margin-top: 34px; }
.study-stamps { margin-top: 26px; }
.back-link { text-decoration: none; color: var(--fog); transition: color var(--dur-micro) var(--ease-silk); }
.nav-menu a[aria-current="page"] { color: var(--fog-bright); }
.case { padding: 26px; border: 1px solid rgba(240,238,228,.16); border-radius: 12px; background: var(--stage-2); }
.case .stamp { white-space: normal; line-height: 1.3; }
.case-meta h3 { margin: 18px 0 10px; }
.case-meta p { color: var(--fog); font-size: .94rem; }
.metric-table { margin-top: 24px; font-size: .8rem; }
.stage .metric-table th, .stage .metric-table td { border-top-color: rgba(240,238,228,.13); }
.stage .metric-table thead th { color: var(--fog-60); }
.stage .metric-table tbody th { color: var(--fog-bright); font-weight: 600; }
.stage .metric-table td { color: var(--fog); font-variant-numeric: tabular-nums; }
.case-compare { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin-top: 26px; padding-top: 20px; border-top: 1px solid rgba(240,238,228,.13); }
.case-compare strong { display: block; margin-top: 8px; color: var(--fog-bright); font: 700 2rem/1 var(--font-display); }
.case-compare p { margin-top: 7px; color: var(--fog); font-size: .75rem; line-height: 1.4; }
.evidence-foot { margin-top: 20px; color: var(--fog-60); font: 400 .7rem/1.55 var(--font-mono); }

/* method */
.method-layout { display: grid; grid-template-columns: 1.18fr .82fr; gap: 54px; align-items: start; }
.method-list { list-style: none; padding: 0; margin-top: 32px; border-top: 1px solid var(--hairline); }
.method-list li { padding: 18px 0; border-bottom: 1px solid var(--hairline); color: var(--ink-60); }
.method-list strong { color: var(--ink); }
.faq { position: sticky; top: 90px; padding: 8px 22px; border: 1px solid var(--hairline); border-radius: 12px; background: var(--paper-2); }
.faq-title { padding: 18px 0 10px; }
.faq details { padding: 15px 0; border-top: 1px solid var(--hairline); }
.faq details:first-of-type { border-top: 0; }
.faq summary { display: flex; justify-content: space-between; align-items: center; gap: 12px; list-style: none; cursor: pointer; font: 500 1rem/1.35 var(--font-display); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent-ink); font: 500 1rem/1 var(--font-mono); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 10px; color: var(--ink-60); font-size: .86rem; }

/* footer */
.footer { text-align: center; }
.footer .wave { width: min(720px,90%); margin: 0 auto; color: var(--fog); }
.footer h2 { max-width: 18ch; margin: 34px auto 0; }
.footer-lead { margin-inline: auto; }
.footer .cta { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 16px; margin-top: 26px; }
.fineprint { margin: 26px auto 0; color: var(--fog-60); font: 400 .72rem/1.55 var(--font-mono); }
.sig { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 42px; color: var(--fog-bright); }
.sig svg { width: 28px; height: 28px; }
.sig span { font: 500 1.15rem/1 var(--font-display); text-transform: lowercase; }
.copy { margin-top: 13px; color: var(--fog-60); font: 400 .66rem/1.4 var(--font-mono); letter-spacing: .06em; text-transform: uppercase; }

/* progressive enhancement */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--dur-reveal) var(--ease-silk), transform var(--dur-reveal) var(--ease-silk);
  transition-delay: calc(var(--i, 0) * 55ms);
}
.js [data-reveal].in { opacity: 1; transform: none; }
.js .chart-panel .bar-fill { transform: scaleX(0); }
.js .chart-panel.in .bar-fill { transform: scaleX(1); transition: transform 420ms var(--ease-silk); transition-delay: calc(var(--d,0) * 45ms); }

@media (hover: hover) and (pointer: fine) {
  .report-index a:hover { color: var(--fog-bright); padding-left: 4px; }
}

@media (max-width: 1080px) {
  .metric-card-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 960px) {
  section { padding: 92px 22px; }
  .nav { padding: 13px 16px; }
  .links { gap: 10px; }
  .nav .links > .btn { padding: 11px 14px; min-height: 42px; font-size: .68rem; }
  .hamburger { display: flex; }
  .nav.menu-open .hamburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav.menu-open .hamburger span:nth-child(2) { opacity: 0; }
  .nav.menu-open .hamburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 2;
    display: flex;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 8px 16px 14px;
    background: var(--stage);
    opacity: 0;
    transform: translateY(-6px);
    pointer-events: none;
    transition: opacity var(--dur-standard) var(--ease-silk), transform var(--dur-standard) var(--ease-silk);
  }
  .nav-menu a { min-height: 44px; display: flex; align-items: center; padding: 12px 8px; border-bottom: 1px solid rgba(240,238,228,.12); }
  .nav.menu-open .nav-menu { opacity: 1; transform: none; pointer-events: auto; }
  .hero { padding-top: 112px; padding-bottom: 76px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy h1 { max-width: 11ch; }
  .hero-visual { min-height: 300px; }
  .blind-spot-rail { grid-template-columns: 1fr 1fr; }
  .blind-spot-rail li:nth-child(3) { border-left: 0; }
  .blind-spot-rail li:nth-child(n+3) { border-top: 1px solid var(--ink); }
  .report-shell { grid-template-columns: 1fr; }
  .report-index { position: sticky; top: 68px; z-index: 4; padding: 12px; margin-bottom: 0; background: var(--stage); border: 1px solid rgba(240,238,228,.14); overflow-x: auto; }
  .report-index > div { display: none; }
  .report-index nav { display: flex; width: max-content; margin-top: 0; border: 0; }
  .report-index a { padding: 10px 16px; border: 0; border-right: 1px solid rgba(240,238,228,.16); }
  .two-up, .proof-grid, .lift-grid { grid-template-columns: 1fr; }
  .method-layout { grid-template-columns: 1fr; }
  .faq { position: static; }
}

@media (max-width: 680px) {
  section { padding: 72px 18px; }
  h1 { font-size: clamp(2.9rem, 13vw, 4.5rem); }
  h2 { font-size: clamp(2.3rem, 10vw, 3.5rem); }
  .nav .brand span { display: none; }
  .hero { padding-top: 104px; }
  .hero-visual { min-height: 240px; }
  .hero-cone { width: clamp(150px, 46vw, 210px); }
  .attribution-scene { padding-inline: 16px; }
  .scene-head { flex-direction: column; }
  .blind-spot-rail { grid-template-columns: 1fr; }
  .blind-spot-rail li + li, .blind-spot-rail li:nth-child(3) { border-left: 0; border-top: 1px solid var(--ink); }
  .message-comparison { grid-template-columns: 1fr; }
  .parity-connector { flex-direction: row; min-height: 72px; }
  .parity-connector span { transform: rotate(90deg); }
  .report-meta { grid-template-columns: 1fr; }
  .report-meta > div:nth-child(even) { padding-left: 0; border-left: 0; }
  .report-document { border-radius: 8px; }
  .report-title-row, .report-section-head { flex-direction: column; }
  .metric-card-grid { grid-template-columns: 1fr 1fr; }
  .metric-card-grid article { min-height: 126px; padding: 13px; }
  .bar-chart li, .domains li { grid-template-columns: minmax(82px,.85fr) minmax(60px,1fr) 38px; gap: 7px; }
  .bar-chart li > span:first-child { overflow-wrap: anywhere; }
  .lift-results, .lift-results.two-row { grid-template-columns: 1fr; }
  .lift-results .wide { grid-column: auto; }
  .data-table, .data-table thead, .data-table tbody, .data-table th, .data-table td, .data-table tr, .metric-table, .metric-table thead, .metric-table tbody, .metric-table th, .metric-table td, .metric-table tr { display: block; width: 100%; }
  .data-table thead, .metric-table thead { display: none; }
  .data-table tr, .metric-table tr { padding: 13px 0; border-top: 1px solid currentColor; }
  .data-table th, .data-table td, .metric-table th, .metric-table td { padding: 3px 0; border: 0; }
  .case-compare { grid-template-columns: 1fr; }
  .case-compare > div { padding-top: 12px; border-top: 1px solid rgba(240,238,228,.12); }
  .btn-row { align-items: stretch; flex-direction: column; }
  .btn-row .btn { width: 100%; }
}

@media (max-width: 390px) {
  .nav .links > .btn { padding-inline: 11px; font-size: .62rem; }
  .attribution-scene { margin-inline: -4px; }
  .metric-card-grid { grid-template-columns: 1fr; }
  .sentiment-key { grid-template-columns: 1fr; }
}

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

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }