/* ============================================================
   RSCHR — CORPUS design system
   Editorial gravitas for evidence work.
   Tokens seeded directly from the brand brief (§2).
   ============================================================ */

:root {
  /* Light (primary) palette */
  --paper:        #F4F0E7;
  --card:         #FFFFFF;
  --shade:        #EAE3D2;
  --accent-surf:  #F5E6D6;
  --ink:          #1F1B16;
  --ink-2:        #6B6258;
  --ink-3:        #938A7E;
  --sienna:       #B45A2A;
  --sienna-deep:  #7A3D1A;
  --line:         #E0DBCE;
  --line-strong:  #B5AC97;

  /* Categorical earth tones (data-viz only, sparingly) */
  --slate:     #2D5566;
  --olive:     #5E6A3A;
  --amber:     #C77B3E;
  --terra:     #B14B3E;
  --forest:    #4A7C59;

  /* Type */
  --serif: 'Fraunces', 'Charter', Georgia, serif;
  --ui:    'Geist', system-ui, -apple-system, sans-serif;
  --mono:  'Geist Mono', ui-monospace, 'SF Mono', monospace;

  /* Radii */
  --r-sm: 4px; --r-md: 6px; --r-lg: 10px; --r-xl: 14px;

  /* Shadows — soft, warm, subtle */
  --sh-sm: 0 1px 2px rgba(31,27,22,.10);
  --sh-md: 0 4px 12px rgba(31,27,22,.10);
  --sh-lg: 0 14px 36px -12px rgba(31,27,22,.22);

  /* Motion */
  --t-fast: 150ms; --t-med: 250ms; --t-slow: 400ms;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  /* Layout */
  --maxw: 1180px;
  --gutter: clamp(20px, 5vw, 56px);
}

/* ---------- Reset & base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--ui);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* faint warm paper grain */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none; z-index: 9999;
  opacity: .035; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--sienna-deep), var(--sienna), var(--amber));
  z-index: 200;
  pointer-events: none;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.serif { font-family: var(--serif); font-optical-sizing: auto; }
em { font-style: italic; }
.serif em { font-family: var(--serif); font-weight: 300; }

/* ---------- Layout helpers ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
section { position: relative; }
.section-pad { padding-block: clamp(72px, 11vw, 132px); }

.kicker {
  font-family: var(--mono);
  font-size: 12px; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--sienna);
  display: inline-flex; align-items: center; gap: 14px;
  margin-bottom: 20px;
}
.kicker::before { content: ""; width: 26px; height: 1px; background: var(--sienna); opacity: .55; }

h2.head {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.04; letter-spacing: -0.025em;
  text-wrap: balance; max-width: 18ch;
}
.sub {
  font-size: clamp(16px, 1.5vw, 18px);
  color: var(--ink-2); max-width: 60ch;
  margin-top: 20px; text-wrap: pretty;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 15px; font-weight: 500; letter-spacing: -0.01em;
  padding: 12px 22px; border-radius: var(--r-md);
  transition: transform var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--sienna); color: #fff; box-shadow: var(--sh-sm); }
.btn-primary:hover { background: var(--sienna-deep); transform: translateY(-1px); box-shadow: var(--sh-md); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.btn-secondary:hover { border-color: var(--line-strong); transform: translateY(-1px); }
.btn-lg { font-size: 17px; padding: 16px 30px; }

.meta {
  font-family: var(--mono); font-size: 12.5px;
  color: var(--ink-3); letter-spacing: 0.01em;
}
.meta b { color: var(--sienna-deep); font-weight: 500; }

/* link with underline-wipe */
.link-wipe {
  color: var(--sienna); font-weight: 500;
  background-image: linear-gradient(var(--sienna), var(--sienna));
  background-size: 0% 1.5px; background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size var(--t-med) var(--ease);
  padding-bottom: 2px;
}
.link-wipe:hover { background-size: 100% 1.5px; }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background var(--t-med) var(--ease),
              box-shadow var(--t-med) var(--ease),
              border-color var(--t-med) var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.solid {
  background: rgba(244,240,231,.86);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom-color: var(--line);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex; align-items: center; gap: 28px;
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand img { width: 30px; height: 30px; border-radius: 7px; box-shadow: var(--sh-sm); }
.brand .word { font-family: var(--serif); font-weight: 400; font-size: 22px; letter-spacing: 0.02em; }
.nav-links { display: flex; gap: 28px; margin-left: auto; }
.nav-links a {
  font-size: 14.5px; color: var(--ink-2); font-weight: 450;
  transition: color var(--t-fast) var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav .btn { margin-left: 4px; }
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav .btn-nav-dl { margin-left: auto; padding: 10px 16px; font-size: 14px; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero { padding-top: clamp(118px, 16vw, 168px); padding-bottom: clamp(40px, 7vw, 80px); isolation: isolate; }
.hero-atmosphere {
  position: absolute;
  inset: 74px var(--gutter) 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}
.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(.2px);
  opacity: .58;
  transform: translate3d(0, var(--parallax-y, 0px), 0);
}
.orb-a {
  width: clamp(170px, 22vw, 310px);
  aspect-ratio: 1;
  right: 3%;
  top: 4%;
  background: radial-gradient(circle at 32% 30%, rgba(180,90,42,.18), rgba(180,90,42,.04) 55%, transparent 72%);
  animation: slow-breathe 9s var(--ease) infinite alternate;
}
.orb-b {
  width: clamp(130px, 16vw, 220px);
  aspect-ratio: 1;
  left: 5%;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(45,85,102,.13), transparent 68%);
  animation: slow-breathe 11s var(--ease) infinite alternate-reverse;
}
.rule {
  position: absolute;
  height: 1px;
  width: min(32vw, 360px);
  background: linear-gradient(90deg, transparent, rgba(180,90,42,.28), transparent);
  transform: translate3d(0, var(--parallax-y, 0px), 0) rotate(-14deg);
}
.rule-a { right: 16%; top: 15%; }
.rule-b { left: 12%; bottom: 14%; transform: translate3d(0, var(--parallax-y, 0px), 0) rotate(18deg); }
.hero-grid {
  display: grid; grid-template-columns: 1fr; gap: clamp(36px, 5vw, 64px);
  align-items: center;
}
@media (min-width: 1000px) { .hero-grid { grid-template-columns: 1.02fr 1.18fr; } }

.hero h1 {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.0; letter-spacing: -0.03em;
  text-wrap: balance;
}
.hero h1 em { color: var(--sienna); }
.hero .sub { font-size: clamp(17px, 1.8vw, 20px); max-width: 46ch; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 34px; }
.hero-meta { margin-top: 18px; }
.hero-see { margin-top: 26px; }
.hero-see a { font-size: 14.5px; color: var(--ink-2); display: inline-flex; align-items: center; gap: 7px; }
.hero-see a:hover { color: var(--sienna); }
.hero-see .arr { display: inline-block; transition: transform var(--t-med) var(--ease); }
.hero-see a:hover .arr { transform: translateY(3px); }
.evidence-trail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-top: 22px;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.evidence-trail span {
  position: relative;
  color: var(--ink-2);
}
.evidence-trail i {
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong), var(--sienna));
  transform-origin: left;
  animation: trail-pulse 2.8s var(--ease) infinite;
}
.evidence-trail i:nth-of-type(2) { animation-delay: .35s; }
.evidence-trail i:nth-of-type(3) { animation-delay: .7s; }

/* reveal primitives */
.reveal { opacity: 0; transform: translateY(22px); filter: blur(8px); transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease), filter var(--t-slow) var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.in { filter: blur(0); }
.reveal-d1 { transition-delay: 80ms; } .reveal-d2 { transition-delay: 160ms; }
.reveal-d3 { transition-delay: 240ms; } .reveal-d4 { transition-delay: 320ms; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; filter: none !important; transition: none !important; }
  .orb, .evidence-trail i { animation: none !important; }
}

/* ---------- macOS window mockup ---------- */
.window {
  background: var(--card); border-radius: var(--r-xl);
  box-shadow: var(--sh-lg), 0 0 0 1px var(--line);
  overflow: hidden;
}
.win-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; background: var(--shade);
  border-bottom: 1px solid var(--line);
}
.win-dot { width: 11px; height: 11px; border-radius: 50%; }
.win-dot.r { background: #E0796B; } .win-dot.y { background: #E3B23C; } .win-dot.g { background: #6FB87A; }
.win-title { font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); margin: 0 auto; letter-spacing: .04em; }
.win-body { display: grid; grid-template-columns: 168px 1fr; min-height: 430px; }
@media (max-width: 560px) { .win-body { grid-template-columns: 1fr; } .win-side { display: none; } }

.win-side { background: var(--paper); border-right: 1px solid var(--line); padding: 16px 14px; }
.side-label { font-family: var(--mono); font-size: 9.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin: 4px 6px 10px; }
.side-item { display: flex; align-items: center; gap: 9px; padding: 7px 9px; border-radius: var(--r-sm); font-size: 12.5px; color: var(--ink-2); }
.side-item .pip { width: 7px; height: 7px; border-radius: 2px; background: var(--line-strong); }
.side-item.active { background: var(--accent-surf); color: var(--ink); font-weight: 500; }
.side-item.active .pip { background: var(--sienna); }

.win-main { padding: 18px 20px 22px; }
.wm-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px; }
.wm-title { font-family: var(--serif); font-size: 18px; font-weight: 400; }
.wm-tag { font-family: var(--mono); font-size: 10px; color: var(--forest); border: 1px solid color-mix(in srgb, var(--forest) 36%, transparent); padding: 2px 7px; border-radius: 999px; }

.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 14px; }
.stat {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r-md); padding: 10px 12px;
}
.stat .lab { font-family: var(--mono); font-size: 9px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.stat .val { font-family: var(--serif); font-size: 24px; font-weight: 400; line-height: 1.1; margin-top: 3px; }
.stat .val.sienna { color: var(--sienna); }

.viz-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.viz {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r-md); padding: 11px 12px;
}
.viz .vlab { font-family: var(--mono); font-size: 9px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 8px; }
.heat { display: grid; grid-template-columns: repeat(6, 1fr); gap: 3px; }
.heat span { aspect-ratio: 1; border-radius: 2px; transform: scale(.3); opacity: 0; transition: transform var(--t-med) var(--ease), opacity var(--t-med) var(--ease); }
.heat.in span { transform: scale(1); opacity: 1; }
svg .draw { stroke-dasharray: var(--len); stroke-dashoffset: var(--len); transition: stroke-dashoffset 1300ms var(--ease); }
svg .draw.in { stroke-dashoffset: 0; }
.area-fill { opacity: 0; transition: opacity var(--t-slow) var(--ease) 400ms; }
.area-fill.in { opacity: 1; }

/* ============================================================
   TRUST STRIP
   ============================================================ */
.trust { border-block: 1px solid var(--line); background: color-mix(in srgb, var(--shade) 55%, var(--paper)); }
.trust-inner { display: flex; flex-wrap: wrap; gap: 14px 40px; justify-content: center; align-items: center; padding-block: 22px; }
.trust-item { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--ink-2); }
.trust-item svg { width: 17px; height: 17px; color: var(--sienna); flex: none; }

/* ============================================================
   PROBLEM → SHIFT
   ============================================================ */
.problem-grid { display: grid; gap: 40px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .problem-grid { grid-template-columns: 1fr 1fr; gap: clamp(40px,6vw,90px); align-items: start; } }
.tension { font-family: var(--serif); font-weight: 300; font-size: clamp(24px,3vw,33px); line-height: 1.28; letter-spacing: -0.02em; text-wrap: pretty; }
.tension .muted { color: var(--ink-3); }
.tension .em { color: var(--ink); }
.answer p { color: var(--ink-2); font-size: 17px; }
.answer p + p { margin-top: 18px; }
.answer .lead { color: var(--ink); font-weight: 500; }

/* ============================================================
   VALUE PILLARS
   ============================================================ */
.pillars { display: grid; gap: 18px; grid-template-columns: 1fr; margin-top: 52px; }
@media (min-width: 680px) { .pillars { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1040px) { .pillars { grid-template-columns: repeat(4, 1fr); } }
.pillar {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 26px 24px 28px;
  transition: transform var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
}
.pillar:hover { transform: translateY(-3px); box-shadow: var(--sh-md); }
.pillar .ic { width: 40px; height: 40px; border-radius: var(--r-md); background: var(--accent-surf); display: grid; place-items: center; margin-bottom: 18px; }
.pillar .ic svg { width: 21px; height: 21px; color: var(--sienna); }
.pillar h3 { font-family: var(--serif); font-weight: 400; font-size: 20px; letter-spacing: -0.01em; margin-bottom: 9px; }
.pillar p { font-size: 14.5px; color: var(--ink-2); }

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.steps { display: grid; gap: 20px; grid-template-columns: 1fr; margin-top: 50px; counter-reset: step; }
@media (min-width: 720px) { .steps { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 1040px) { .steps { grid-template-columns: repeat(4,1fr); } }
.step { position: relative; padding-top: 24px; }
.step::before {
  counter-increment: step; content: counter(step,decimal-leading-zero);
  font-family: var(--mono); font-size: 12px; color: var(--sienna); font-weight: 500;
  display: block; margin-bottom: 14px; letter-spacing: .1em;
}
.step .stepviz { height: 92px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--card); margin-bottom: 16px; padding: 12px; display: grid; place-items: center; }
.step.in .stepviz svg { animation: lift-mark 900ms var(--ease) both; }
.step h3 { font-family: var(--serif); font-weight: 400; font-size: 19px; margin-bottom: 7px; }
.step p { font-size: 14px; color: var(--ink-2); }
.step-line { position: absolute; top: 8px; right: -10px; width: 20px; height: 1px; background: var(--line-strong); display: none; }
@media (min-width: 1040px) { .step:not(:last-child) .step-line { display: block; } }

/* ============================================================
   METHODS
   ============================================================ */
.methods {
  background:
    radial-gradient(circle at 12% 18%, rgba(180,90,42,.09), transparent 26%),
    linear-gradient(180deg, var(--paper), color-mix(in srgb, var(--shade) 64%, var(--paper)));
  border-bottom: 1px solid var(--line);
}
.methods-grid {
  display: grid;
  gap: clamp(34px, 6vw, 86px);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 940px) { .methods-grid { grid-template-columns: .92fr 1.08fr; } }
.method-stack {
  display: grid;
  gap: 14px;
  perspective: 900px;
}
.method-card {
  position: relative;
  overflow: hidden;
  background: rgba(255,255,255,.72);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px 24px 24px 76px;
  box-shadow: var(--sh-sm);
}
.method-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, rgba(180,90,42,.08), transparent);
  transform: translateX(-105%);
  transition: transform 900ms var(--ease);
}
.method-card.in::after { transform: translateX(105%); }
.method-index {
  position: absolute;
  left: 24px;
  top: 26px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sienna);
}
.method-card h3 { font-family: var(--serif); font-size: 21px; font-weight: 400; letter-spacing: -.01em; margin-bottom: 8px; }
.method-card p { color: var(--ink-2); font-size: 14.5px; }
.proof-rail {
  position: relative;
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
  margin-top: clamp(44px, 7vw, 76px);
  padding: 22px;
  background: rgba(255,255,255,.52);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  overflow: hidden;
}
@media (min-width: 760px) { .proof-rail { grid-template-columns: repeat(3, 1fr); } }
.proof-line {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--rail-fill, 0%);
  background: linear-gradient(90deg, rgba(180,90,42,.10), rgba(199,123,62,.03));
  transition: width 1400ms var(--ease);
  pointer-events: none;
}
.proof-metric {
  position: relative;
  padding: 18px;
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  border-radius: var(--r-md);
  background: rgba(244,240,231,.62);
}
.proof-value {
  display: block;
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1;
  color: var(--sienna);
  letter-spacing: -.03em;
}
.proof-label {
  display: block;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ============================================================
   FEATURE SHOWCASE
   ============================================================ */
.feature { display: grid; gap: clamp(32px,5vw,72px); grid-template-columns: 1fr; align-items: center; }
@media (min-width: 940px) { .feature { grid-template-columns: 1fr 1fr; } .feature.flip .feat-visual { order: -1; } }
.feature + .feature { margin-top: clamp(64px, 9vw, 116px); }
.feat-copy h3 { font-family: var(--serif); font-weight: 300; font-size: clamp(26px,3.2vw,38px); line-height: 1.08; letter-spacing: -0.02em; }
.feat-copy p { color: var(--ink-2); font-size: 16.5px; margin-top: 16px; max-width: 46ch; }
.feat-points { margin-top: 22px; display: flex; flex-direction: column; gap: 11px; }
.feat-points li { list-style: none; display: flex; gap: 11px; font-size: 14.5px; color: var(--ink-2); }
.feat-points li::before { content: ""; flex: none; width: 6px; height: 6px; border-radius: 50%; background: var(--sienna); margin-top: 8px; }

.feat-visual {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 22px; box-shadow: var(--sh-md);
}
.feat-visual .vhead { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.feat-visual .vhead .vt { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); }

/* big heatmap */
.bigheat { display: grid; grid-template-columns: 84px repeat(6, 1fr); gap: 4px; align-items: center; }
.bigheat .rl { font-family: var(--mono); font-size: 9.5px; color: var(--ink-3); text-align: right; padding-right: 4px; }
.bigheat .cell { aspect-ratio: 1; border-radius: 3px; position: relative; transform: scale(.4); opacity: 0; transition: transform var(--t-med) var(--ease), opacity var(--t-med) var(--ease); display: grid; place-items: center; }
.bigheat.in .cell { transform: scale(1); opacity: 1; }
.bigheat .cell .cv { font-family: var(--mono); font-size: 9px; color: rgba(255,255,255,.92); }
.bigheat .cell.lo .cv { color: var(--ink-2); }

/* threshold slider module */
.thr-readout { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin-top: 16px; }
.thr-readout .stat { text-align: left; }
.slider-wrap { margin-top: 18px; }
.slider-wrap .srow { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.slider-wrap label { font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.slider-wrap .tval { font-family: var(--mono); font-size: 13px; color: var(--sienna); font-weight: 500; }
input[type=range] {
  -webkit-appearance: none; appearance: none; width: 100%; height: 4px;
  background: var(--line); border-radius: 999px; outline: none;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%;
  background: var(--sienna); border: 3px solid #fff; box-shadow: var(--sh-sm); cursor: pointer;
  transition: transform var(--t-fast) var(--ease);
}
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.12); }
input[type=range]::-moz-range-thumb { width: 20px; height: 20px; border-radius: 50%; background: var(--sienna); border: 3px solid #fff; cursor: pointer; }

/* autoresearch log */
.log { font-family: var(--mono); font-size: 12px; }
.log-row { display: grid; grid-template-columns: 52px 1fr auto; gap: 10px; align-items: center; padding: 9px 4px; border-bottom: 1px solid var(--line); opacity: 0; transform: translateX(-8px); transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease); }
.log-row.in { opacity: 1; transform: none; }
.log-row .gen { color: var(--ink-3); }
.log-row .rel { color: var(--ink); }
.log-row .score { color: var(--forest); font-weight: 500; text-align: right; }
.log-row.best .score { color: var(--sienna); }
.log-row.best .rel { font-weight: 500; }

/* ============================================================
   OUTPUTS
   ============================================================ */
.outputs {
  overflow: hidden;
  background:
    linear-gradient(180deg, var(--paper), var(--shade)),
    radial-gradient(circle at 75% 16%, rgba(45,85,102,.16), transparent 28%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.outputs-head {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
  align-items: end;
}
@media (min-width: 900px) {
  .outputs-head { grid-template-columns: minmax(0, .9fr) minmax(0, 1fr); }
  .outputs-head .sub { margin-left: auto; }
}
.output-stage {
  position: relative;
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
  margin-top: 54px;
}
@media (min-width: 860px) {
  .output-stage {
    grid-template-columns: repeat(3, 1fr);
    align-items: stretch;
  }
  .output-model { --card-offset: 28px; }
  .output-audit { --card-offset: -18px; }
}
.output-card {
  position: relative;
  min-height: 320px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: rgba(255,255,255,.74);
  box-shadow: var(--sh-md);
  overflow: hidden;
  transform: translate3d(0, calc(var(--parallax-y, 0px) + var(--card-offset, 0px)), 0);
}
.output-card.reveal {
  transform: translate3d(0, calc(var(--parallax-y, 0px) + var(--card-offset, 0px) + 22px), 0);
}
.output-card.reveal.in {
  transform: translate3d(0, calc(var(--parallax-y, 0px) + var(--card-offset, 0px)), 0);
}
.output-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, rgba(180,90,42,.12), transparent 42%);
  opacity: .75;
  pointer-events: none;
}
.output-card h3 {
  position: relative;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 300;
  letter-spacing: -.02em;
  margin-top: 20px;
}
.output-card p {
  position: relative;
  color: var(--ink-2);
  font-size: 14.5px;
  margin-top: 12px;
}
.doc-tag {
  position: relative;
  display: inline-flex;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--sienna);
  border: 1px solid color-mix(in srgb, var(--sienna) 28%, transparent);
  border-radius: 999px;
  padding: 5px 9px;
  background: rgba(245,230,214,.68);
}
.paper-lines {
  position: absolute;
  left: 26px;
  right: 26px;
  bottom: 28px;
  display: grid;
  gap: 9px;
}
.paper-lines span {
  display: block;
  height: 8px;
  border-radius: 999px;
  background: var(--line);
}
.paper-lines span:nth-child(1) { width: 88%; }
.paper-lines span:nth-child(2) { width: 72%; }
.paper-lines span:nth-child(3) { width: 93%; }
.paper-lines span:nth-child(4) { width: 54%; background: color-mix(in srgb, var(--sienna) 32%, var(--line)); }
.mini-bars {
  position: absolute;
  left: 26px;
  right: 26px;
  bottom: 28px;
  height: 96px;
  display: flex;
  align-items: end;
  gap: 12px;
}
.mini-bars span {
  flex: 1;
  height: var(--h);
  border-radius: 6px 6px 2px 2px;
  background: linear-gradient(180deg, var(--sienna), var(--sienna-deep));
  opacity: .82;
  transform-origin: bottom;
  transform: scaleY(.12);
  transition: transform 1000ms var(--ease);
}
.output-card.in .mini-bars span { transform: scaleY(1); }
.audit-list {
  position: absolute;
  left: 26px;
  right: 26px;
  bottom: 26px;
  display: grid;
  gap: 10px;
  list-style: none;
}
.audit-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-2);
  font-size: 13.5px;
}
.audit-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 99px;
  background: var(--forest);
  box-shadow: 0 0 0 4px rgba(74,124,89,.12);
}

/* ============================================================
   PRIVACY
   ============================================================ */
.privacy { background: var(--ink); color: var(--paper); border-radius: 0; }
.privacy .kicker { color: var(--amber); }
.privacy .kicker::before { background: var(--amber); }
.privacy h2.head { color: #fff; }
.privacy .sub { color: color-mix(in srgb, var(--paper) 72%, transparent); }
.priv-grid { display: grid; gap: 18px; grid-template-columns: 1fr; margin-top: 48px; }
@media (min-width: 760px) { .priv-grid { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 1040px) { .priv-grid { grid-template-columns: repeat(4,1fr); } }
.priv-card { border: 1px solid rgba(244,240,231,.14); border-radius: var(--r-lg); padding: 24px; background: rgba(244,240,231,.03); }
.priv-card .ic { width: 38px; height: 38px; border-radius: var(--r-md); background: rgba(212,121,74,.16); display: grid; place-items: center; margin-bottom: 16px; }
.priv-card .ic svg { width: 20px; height: 20px; color: #D4794A; }
.priv-card h3 { font-family: var(--serif); font-weight: 400; font-size: 18px; margin-bottom: 8px; }
.priv-card p { font-size: 14px; color: color-mix(in srgb, var(--paper) 64%, transparent); }
.priv-shield { display: flex; align-items: center; gap: 18px; margin-top: 6px; }
.priv-shield svg { width: 54px; height: 54px; color: #D4794A; flex: none; }

/* ============================================================
   AUDIENCE
   ============================================================ */
.aud-grid { display: grid; gap: 16px; grid-template-columns: 1fr; margin-top: 50px; }
@media (min-width: 680px) { .aud-grid { grid-template-columns: 1fr 1fr; } }
.aud {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 22px 24px; transition: border-color var(--t-med) var(--ease);
}
.aud:hover { border-color: var(--line-strong); }
.aud .n { font-family: var(--mono); font-size: 12px; color: var(--sienna); padding-top: 3px; }
.aud h3 { font-family: var(--serif); font-weight: 400; font-size: 19px; margin-bottom: 5px; }
.aud p { font-size: 14px; color: var(--ink-2); }

/* ============================================================
   FAQ
   ============================================================ */
.faq { max-width: 820px; margin: 50px auto 0; }
.qa { border-bottom: 1px solid var(--line); }
.qa:first-child { border-top: 1px solid var(--line); }
.qa-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 20px; text-align: left; padding: 22px 4px; font-family: var(--serif); font-size: clamp(18px,2vw,21px); font-weight: 400; color: var(--ink); }
.qa-q .pm { flex: none; width: 22px; height: 22px; position: relative; }
.qa-q .pm::before, .qa-q .pm::after { content: ""; position: absolute; background: var(--sienna); transition: transform var(--t-med) var(--ease); }
.qa-q .pm::before { top: 50%; left: 2px; right: 2px; height: 2px; transform: translateY(-50%); }
.qa-q .pm::after { left: 50%; top: 2px; bottom: 2px; width: 2px; transform: translateX(-50%); }
.qa.open .pm::after { transform: translateX(-50%) scaleY(0); }
.qa-a { max-height: 0; overflow: hidden; transition: max-height var(--t-slow) var(--ease); }
.qa-a .inner { padding: 0 4px 24px; color: var(--ink-2); font-size: 15.5px; max-width: 64ch; }
@media (prefers-reduced-motion: reduce) { .qa-a { transition: none; } }

/* ============================================================
   FINAL CTA
   ============================================================ */
.closer { background: var(--sienna); color: #fff; text-align: center; }
.closer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(255,255,255,.22), transparent 34%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.08) 0 1px, transparent 1px 84px);
  opacity: .52;
  pointer-events: none;
}
.closer .wrap { padding-block: clamp(72px, 10vw, 124px); }
.closer h2 { font-family: var(--serif); font-weight: 300; font-size: clamp(32px,5vw,56px); line-height: 1.05; letter-spacing: -0.025em; color: #fff; text-wrap: balance; max-width: 20ch; margin: 0 auto; }
.closer h2 em { color: var(--accent-surf); }
.closer .btn-primary { background: #fff; color: var(--sienna-deep); margin-top: 34px; }
.closer .btn-primary:hover { background: var(--paper); }
.closer .meta { color: rgba(255,255,255,.78); margin-top: 20px; }
.closer .meta b { color: #fff; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { background: var(--shade); border-top: 1px solid var(--line); }
.footer .wrap { padding-block: 56px; }
.foot-grid { display: flex; flex-wrap: wrap; gap: 28px 56px; justify-content: space-between; }
.foot-brand { max-width: 280px; }
.foot-brand .brand { margin-bottom: 14px; }
.foot-brand p { font-size: 13.5px; color: var(--ink-2); }
.foot-col h4 { font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 14px; }
.foot-col a, .foot-col span { display: block; font-size: 14px; color: var(--ink-2); margin-bottom: 9px; transition: color var(--t-fast) var(--ease); }
.foot-col a:hover { color: var(--sienna); }
.foot-bottom { margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; }
.foot-bottom .meta { color: var(--ink-3); }

@keyframes slow-breathe {
  from { transform: translate3d(0, var(--parallax-y, 0px), 0) scale(.96); opacity: .42; }
  to { transform: translate3d(0, var(--parallax-y, 0px), 0) scale(1.06); opacity: .7; }
}

@keyframes trail-pulse {
  0%, 100% { transform: scaleX(.36); opacity: .36; }
  45% { transform: scaleX(1); opacity: .95; }
}

@keyframes lift-mark {
  from { transform: translateY(6px) scale(.98); opacity: .7; }
  to { transform: none; opacity: 1; }
}