/* =================================================
   LEAF - v3   All critique items addressed
   ================================================= */
:root {
  --base:     #F1F0EC;
  --base-2:   #E8E7E3;
  --base-3:   #DEDAD5;
  --text:     #1B1E1B;
  --text-2:   #4A514A;
  --text-3:   #767E76;
  --chloro:   #266B43;
  --chloro-h: #1E5636;
  --teal:     #196666;
  --teal-l:   #228888;
  --amber:    #C97850;
  --amber-h:  #A95F3B;
  --amber-s:  rgba(201,120,80,0.26);
  --amber-w:  rgba(201,120,80,0.08);
  --stroke:   rgba(27,30,27,0.09);
  --stroke-s: rgba(27,30,27,0.055);
  --stroke-c: rgba(38,107,67,0.22);
  --f-dis:    'Fraunces', Georgia, serif;
  --f-body:   'Plus Jakarta Sans', sans-serif;
  --f-mono:   'JetBrains Mono', monospace;
  --space-x:  clamp(24px, 5vw, 80px);
  --section-y: clamp(56px, 8vw, 84px);
  --section-y-tight: clamp(38px, 5.2vw, 56px);
  --r-leaf:   4px 18px 16px 6px;
  --r-pill:   100px;
  --ease:     cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior: smooth; }
body {
  background: var(--base);
  color: var(--text);
  font-family: var(--f-body);
  font-size: 18px;
  line-height: 1.62;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--chloro);
  outline-offset: 3px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

.skip-link {
  position: absolute;
  left: 14px;
  top: 10px;
  z-index: 1000;
  background: var(--chloro);
  color: #fff;
  text-decoration: none;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 9px 12px;
  border-radius: 6px;
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* Typography */
.t-kicker {
  font-family: var(--f-mono);
  font-size: 10px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--text-3);
}
.t-dis {
  font-family: var(--f-dis);
  font-weight: 300; letter-spacing: -0.025em;
  line-height: 1.08; color: var(--text);
}
.t-dis em { font-style: italic; color: var(--chloro); }
h1.t-dis { font-size: clamp(42px, 5.8vw, 74px); }
h2.t-dis { font-size: clamp(30px, 4vw, 54px); }

/* Vein SVG */
.vp {
  stroke: rgba(38,107,67,0.2); stroke-width: 0.75;
  fill: none; stroke-linecap: round;
  stroke-dasharray: 600; stroke-dashoffset: 600;
  transition: stroke-dashoffset 900ms var(--ease);
}
.vb {
  stroke: rgba(38,107,67,0.09); stroke-width: 0.45;
  fill: none; stroke-linecap: round;
  stroke-dasharray: 300; stroke-dashoffset: 300;
  transition: stroke-dashoffset 700ms 180ms var(--ease);
}
.vt { stroke: rgba(25,102,102,0.13); }
.drawn { stroke-dashoffset: 0 !important; }

/* Membrane wash - light */
.mem {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.mem > :not(.mem-f1):not(.mem-f2):not(.hero-drift) {
  position: relative;
  z-index: 1;
}
.mem::after {
  content: '';
  position: absolute;
  inset: -28% -18%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.05;
  background:
    conic-gradient(
      from 180deg at 50% 50%,
      rgba(38,107,67,0.04),
      rgba(25,102,102,0.02),
      rgba(38,107,67,0.01),
      rgba(38,107,67,0.04)
    );
  filter: blur(54px);
  transform: translate3d(0,0,0) rotate(0deg) scale(1);
  transition: opacity 500ms var(--ease);
  animation: mem-orbit 40s linear infinite;
}
.mem.in-view::after { opacity: 0.16; }
.mem-f1, .mem-f2 {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
}
.mem-f1 {
  background:
    radial-gradient(ellipse 68% 58% at 26% 50%, rgba(38,107,67,0.05) 0%, transparent 65%),
    radial-gradient(ellipse 55% 68% at 74% 44%, rgba(25,102,102,0.04) 0%, transparent 65%);
  filter: blur(60px);
}
.mem-f2 {
  background:
    radial-gradient(ellipse 38% 38% at 80% 82%, rgba(38,107,67,0.032) 0%, transparent 55%),
    radial-gradient(ellipse 32% 32% at 18% 18%, rgba(25,102,102,0.028) 0%, transparent 55%);
  filter: blur(85px);
  animation: mem-drift 24s ease-in-out infinite alternate;
}
@keyframes mem-drift {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(4px,-3px) scale(1.016); }
}
@keyframes mem-orbit {
  from { transform: translate3d(-1.5%, 0, 0) rotate(0deg) scale(1); }
  50%  { transform: translate3d(1.5%, -1%, 0) rotate(180deg) scale(1.02); }
  to   { transform: translate3d(-1.5%, 0, 0) rotate(360deg) scale(1); }
}
@keyframes plume-sweep {
  from { transform: translate3d(-3%, 1%, 0) scale(1); opacity: 0.24; }
  50%  { transform: translate3d(3%, -2%, 0) scale(1.05); opacity: 0.38; }
  to   { transform: translate3d(-3%, 1%, 0) scale(1); opacity: 0.24; }
}

/* Stomata texture */
.stomata {
  background-image: radial-gradient(
    ellipse 1.5px 2.5px at 50% 50%,
    rgba(27,30,27,0.048) 50%, transparent 51%
  );
  background-size: 22px 22px;
}

/* =================================================
   NAV - FIX: -webkit-backdrop-filter for Firefox
   ================================================= */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 60px; display: flex; align-items: center;
  padding: 0 48px; justify-content: space-between;
  border-bottom: 1px solid var(--stroke-s);
  background: rgba(241,240,236,0.9);
  -webkit-backdrop-filter: blur(20px) saturate(160%); /* FIX: Firefox */
  backdrop-filter: blur(20px) saturate(160%);
  overflow: hidden;
}
.nav-logo {
  display: flex; align-items: baseline; gap: 9px; text-decoration: none;
}
.nav-logo-img {
  height: 36px;
  width: auto;
  border-radius: 6px;
  display: block;
}
.nav-sub-offset { margin-left: 2px; }
.nav-word {
  font-family: var(--f-dis); font-size: 19px; font-weight: 300;
  letter-spacing: 0.28em; color: var(--text);
}
.nav-sub {
  font-family: var(--f-mono); font-size: 8px; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--text-3);
}
/* FIX: Nav links anchor to real sections */
.nav-links { list-style: none; display: flex; gap: 26px; }
.nav-links a {
  font-size: 11.5px; letter-spacing: 0.07em; text-transform: uppercase;
  text-decoration: none; color: var(--text-2); transition: color 240ms;
  padding: 2px 0; border-bottom: 1px solid transparent;
  transition: color 240ms, border-color 240ms;
}
.nav-links a:hover { color: var(--chloro); border-bottom-color: rgba(38,107,67,0.3); }
.nav-links a.active { color: var(--chloro); border-bottom-color: var(--stroke-c); }
.nav-cta {
  font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.1em;
  text-transform: uppercase; text-decoration: none;
  color: var(--chloro); border: 1px solid var(--stroke-c);
  padding: 7px 18px 8px 20px; border-radius: var(--r-leaf);
  transition: all 300ms var(--ease);
}
.nav-cta:hover { background: var(--chloro); color: #fff; box-shadow: 0 4px 20px rgba(38,107,67,0.18); }
.nav-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid var(--stroke);
  border-radius: 8px;
  background: rgba(255,255,255,0.45);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}
.nav-toggle-line {
  width: 16px;
  height: 1.5px;
  background: var(--text-2);
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.mobile-nav {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  z-index: 99;
  border-bottom: 1px solid var(--stroke-s);
  background: rgba(241,240,236,0.96);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  padding: 14px 20px 20px;
}
.mobile-nav[hidden] { display: none !important; }
.mobile-links {
  list-style: none;
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}
.mobile-links a {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-2);
  padding: 8px 2px;
  border-bottom: 1px solid var(--stroke-s);
}
.mobile-links a.active,
.mobile-links a:hover { color: var(--chloro); }
.mobile-cta {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--chloro);
  border: 1px solid var(--stroke-c);
  padding: 8px 16px 9px 18px;
  border-radius: var(--r-leaf);
}
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(38,107,67,0.08);
  pointer-events: none;
}
.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--chloro), var(--teal-l));
}

.section-anchor {
  position: relative;
  z-index: 1;
}
.section-anchor .t-kicker { margin-bottom: 12px; }
.section-title {
  margin-bottom: 16px;
  max-width: 780px;
}
.section-sub {
  max-width: 62ch;
  font-size: clamp(15px, 1.2vw, 17px);
  line-height: 1.72;
  color: var(--text-2);
  font-weight: 300;
}
.section-anchor.center {
  text-align: center;
}
.section-anchor.center .section-title,
.section-anchor.center .section-sub {
  margin-left: auto;
  margin-right: auto;
}
.section-title-sm {
  font-size: clamp(22px, 2.8vw, 32px);
  margin-bottom: 8px;
}
.section-anchor-compact { margin-bottom: 18px; }
#signals .t-kicker,
#comfort .t-kicker,
#platform .t-kicker,
#cta .t-kicker {
  color: var(--amber);
}
#response .t-kicker,
#privacy .t-kicker {
  color: var(--teal-l);
}

/* =================================================
   HERO
   ================================================= */
#hero {
  min-height: 92vh; display: flex; flex-direction: column;
  justify-content: center; padding: clamp(92px, 12vh, 124px) var(--space-x) clamp(58px, 8vh, 82px);
  position: relative; z-index: 1;
  background:
    radial-gradient(circle at 80% 10%, rgba(201,120,80,0.1), transparent 42%),
    radial-gradient(circle at 14% 84%, rgba(25,102,102,0.08), transparent 46%),
    linear-gradient(180deg, #f4f2ed 0%, var(--base) 72%);
}
#hero > :not(.hero-drift) { position: relative; z-index: 1; }
.hero-drift {
  position: absolute;
  inset: clamp(62px, 9vh, 110px) clamp(18px, 4vw, 72px) clamp(18px, 6vh, 64px) clamp(12px, 3vw, 48px);
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.8;
  filter: saturate(108%);
}
.hero-drift-layer {
  position: absolute;
  border-radius: 46% 54% 52% 48% / 44% 56% 46% 54%;
  border: 1.1px solid rgba(38,107,67,0.22);
  background: radial-gradient(ellipse at 32% 36%, rgba(38,107,67,0.16) 0%, rgba(38,107,67,0.045) 50%, transparent 74%);
  box-shadow:
    inset 0 0 28px rgba(38,107,67,0.06),
    0 0 34px rgba(38,107,67,0.07);
  will-change: transform, opacity;
}
.hd-l1 {
  inset: 6% 42% 30% 6%;
  animation: hero-drift-a 24s ease-in-out infinite alternate;
}
.hd-l2 {
  inset: 22% 12% 16% 46%;
  border-color: rgba(25,102,102,0.18);
  background: radial-gradient(ellipse at 62% 44%, rgba(25,102,102,0.14) 0%, rgba(25,102,102,0.045) 48%, transparent 76%);
  animation: hero-drift-b 29s ease-in-out infinite;
}
.hd-l3 {
  inset: 42% 38% 8% 14%;
  border-color: rgba(201,120,80,0.24);
  background: radial-gradient(ellipse at 46% 48%, rgba(201,120,80,0.12) 0%, rgba(201,120,80,0.038) 50%, transparent 78%);
  animation: hero-drift-c 26s ease-in-out infinite reverse;
}
@keyframes hero-drift-a {
  0% { transform: translate3d(0, 0, 0) scale(1) rotate(0deg); opacity: 0.42; }
  50% { transform: translate3d(14px, -8px, 0) scale(1.06) rotate(1.6deg); opacity: 0.64; }
  100% { transform: translate3d(24px, 6px, 0) scale(0.98) rotate(-1.2deg); opacity: 0.46; }
}
@keyframes hero-drift-b {
  0% { transform: translate3d(0, 0, 0) scale(1) rotate(0deg); opacity: 0.36; }
  50% { transform: translate3d(-18px, 10px, 0) scale(1.07) rotate(-2.2deg); opacity: 0.58; }
  100% { transform: translate3d(-8px, -12px, 0) scale(0.97) rotate(1.3deg); opacity: 0.4; }
}
@keyframes hero-drift-c {
  0% { transform: translate3d(0, 0, 0) scale(1) rotate(0deg); opacity: 0.3; }
  50% { transform: translate3d(10px, 12px, 0) scale(1.08) rotate(1.8deg); opacity: 0.5; }
  100% { transform: translate3d(-14px, -6px, 0) scale(0.96) rotate(-1.5deg); opacity: 0.34; }
}
.hero-hed { max-width: 860px; margin-bottom: 22px; }
.hero-sub {
  font-size: clamp(17px, 1.45vw, 20px); line-height: 1.68; color: var(--text-2);
  font-weight: 300; margin-bottom: 34px; max-width: 50ch;
}
.hero-signal-strip {
  width: min(360px, 74vw);
  display: flex;
  gap: 8px;
  margin-bottom: 26px;
}
.hero-signal-strip span {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(38,107,67,0.2), rgba(38,107,67,0.7));
  transform-origin: left center;
  animation: signal-strip 2.8s ease-in-out infinite;
}
.hero-signal-strip span:nth-child(2) {
  background: linear-gradient(90deg, rgba(25,102,102,0.18), rgba(25,102,102,0.62));
  animation-delay: 140ms;
}
.hero-signal-strip span:nth-child(3) {
  background: linear-gradient(90deg, rgba(38,107,67,0.14), rgba(38,107,67,0.5));
  animation-delay: 280ms;
}
@keyframes signal-strip {
  0%, 100% { transform: scaleX(0.35); opacity: 0.38; }
  45%, 55% { transform: scaleX(1); opacity: 1; }
}
.hero-actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }

.btn-pri {
  display: inline-block; font-family: var(--f-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase; text-decoration: none;
  color: #fff; background: var(--chloro); border: 1px solid var(--chloro);
  padding: 14px 36px 16px 40px; border-radius: var(--r-leaf);
  position: relative;
  overflow: hidden;
  transition: all 360ms var(--ease);
}
.btn-pri::after {
  content: '';
  position: absolute;
  inset: -20% auto -20% -40%;
  width: 42%;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.28), transparent);
  transform: skewX(-22deg) translateX(-160%);
  animation: btn-sheen 3.2s ease-in-out infinite;
}
@keyframes btn-sheen {
  0%, 70%, 100% { transform: skewX(-22deg) translateX(-160%); }
  82% { transform: skewX(-22deg) translateX(420%); }
}
.btn-pri:hover {
  background: var(--chloro-h); border-color: var(--chloro-h);
  box-shadow: 0 8px 32px rgba(38,107,67,0.22); transform: translateY(-1px);
}
.btn-sec {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--f-mono); font-size: 10.5px; letter-spacing: 0.1em;
  text-transform: uppercase; text-decoration: none;
  color: var(--text-3); transition: color 240ms;
}
.btn-sec:hover { color: var(--chloro); }
.btn-sec::after { content: '↗'; font-size: 11px; transition: transform 240ms; }
.btn-sec:hover::after { transform: translate(2px,-2px); }
.btn-soon {
  color: var(--text-3);
  opacity: 0.85;
  cursor: default;
}
.btn-soon::after { content: ''; display: none; }

#cta,
#cta-form {
  scroll-margin-top: 84px;
}

/* FIX: Scroll cue */
.scroll-cue {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  z-index: 1; opacity: 0; animation: cue-in 1s ease 1.8s forwards;
}
@keyframes cue-in { to { opacity: 1; } }
.scroll-cue-line {
  width: 1px; height: 36px;
  background: linear-gradient(to bottom, transparent, rgba(38,107,67,0.4));
  animation: cue-line 2s ease-in-out 2s infinite;
}
@keyframes cue-line {
  0%,100% { transform: scaleY(1); opacity: 0.6; }
  50%      { transform: scaleY(1.3); opacity: 1; }
}
.scroll-cue-label {
  font-family: var(--f-mono); font-size: 8px; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--text-3);
  writing-mode: vertical-lr; transform: rotate(180deg);
}

/* =================================================
   ABOUT BRIEF - #about-brief
   ================================================= */
#about-brief {
  padding: 14px 80px 8px;
  background: transparent;
}
.about-brief-inner {
  max-width: 920px;
  display: block;
}
.about-brief-line {
  font-size: clamp(18px, 2.1vw, 24px);
  line-height: 1.48;
  color: var(--text);
  font-weight: 400;
  max-width: 62ch;
}

/* Hero membrane visual */
.hero-membrane {
  position: absolute; bottom: -20px; right: -20px;
  width: 440px; height: 440px; pointer-events: none; z-index: 0;
  opacity: 0; transition: opacity 1.6s ease 0.6s;
}
.hero-membrane.vis { opacity: 1; }
.hero-membrane-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hm-ring {
  position: absolute;
  border-radius: 48% 54% 50% 46% / 44% 50% 56% 50%;
  border: 1px solid;
}
.hm-r1 {
  inset: 8%; border-color: rgba(38,107,67,0.16);
  background: radial-gradient(ellipse at 38% 38%, rgba(38,107,67,0.05) 0%, transparent 70%);
  animation: hm-b1 11s ease-in-out infinite;
}
.hm-r2 {
  inset: 22%; border-color: rgba(25,102,102,0.12);
  background: radial-gradient(ellipse at 62% 58%, rgba(25,102,102,0.055) 0%, transparent 70%);
  animation: hm-b2 14s ease-in-out infinite;
}
.hm-r3 {
  inset: 37%; border-color: rgba(38,107,67,0.2);
  background: radial-gradient(ellipse at 50% 50%, rgba(38,107,67,0.08) 0%, transparent 65%);
  animation: hm-b3 8s ease-in-out infinite;
}
.hm-core {
  position: absolute; inset: 46%; border-radius: 50%;
  background: var(--chloro); opacity: 0.18; filter: blur(14px);
  animation: hm-core 5.5s ease-in-out infinite;
}
.hm-gring {
  position: absolute; border-radius: 50%;
  border: 1px solid rgba(38,107,67,0.055);
}
.hg1 { inset: 0; } .hg2 { inset: -9%; } .hg3 { inset: -19%; }

@keyframes hm-b1 { 0%,100%{transform:scale(1) rotate(0deg)} 50%{transform:scale(1.035) rotate(1.4deg)} }
@keyframes hm-b2 { 0%,100%{transform:scale(1) rotate(0deg)} 50%{transform:scale(1.05) rotate(-0.9deg)} }
@keyframes hm-b3 { 0%,100%{transform:scale(1) rotate(0deg)} 50%{transform:scale(1.04) rotate(.8deg)} }
@keyframes hm-core{ 0%,100%{opacity:.15;transform:scale(1)} 50%{opacity:.32;transform:scale(1.18)} }

/* =================================================
   SECTION VEIN DIVIDERS - FIX: no preserveAspectRatio
   ================================================= */
.vdiv {
  width: 100%; height: 52px; display: block;
  overflow: visible; padding: 0 var(--space-x);
  /* FIX: remove preserveAspectRatio="none" - set on SVG element */
}

/* =================================================
   TILES - #signals
   ================================================= */
#signals {
  background:
    linear-gradient(180deg, rgba(201,120,80,0.075) 0%, rgba(201,120,80,0.02) 26%, var(--base-2) 78%);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
#signals > * {
  position: relative;
  z-index: 1;
}
#signals::after {
  content: '';
  position: absolute;
  inset: -10% -8%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.32;
  background:
    radial-gradient(circle at 76% 34%, rgba(38,107,67,0.19) 0 1px, transparent 1.8px) 0 0 / 24px 24px,
    radial-gradient(circle at 74% 70%, rgba(25,102,102,0.16) 0 1px, transparent 1.9px) 12px 12px / 28px 28px;
}
#signals .section-anchor {
  padding: clamp(36px, 5vw, 54px) var(--space-x) 16px;
}
.tiles-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(0, 0.84fr);
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--stroke-s);
  border-top: 1px solid var(--stroke-s);
  border-bottom: 1px solid var(--stroke-s);
}
.tile {
  background: var(--base-2); padding: 44px 34px 40px;
  position: relative; overflow: hidden;
  transition: background 300ms var(--ease), transform 300ms var(--ease);
}
.tile::before {
  content: '';
  position: absolute;
  inset: -45% -35%;
  pointer-events: none;
  background: radial-gradient(circle at 28% 50%, rgba(38,107,67,0.14), transparent 56%);
  opacity: 0;
  transform: translateX(-16px) scale(0.96);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}
.tile:nth-child(1) { grid-area: 1 / 1 / 3 / 2; padding: 52px 44px 46px; }
.tile:nth-child(2) { grid-area: 1 / 2 / 2 / 3; }
.tile:nth-child(3) { grid-area: 2 / 2 / 3 / 3; }
.tile::after {
  content: ''; position: absolute; left: 0; bottom: 0;
  height: 2px; width: 0;
  background: linear-gradient(90deg, var(--chloro), transparent);
  transition: width 420ms var(--ease);
}
.tile:hover::after { width: 70%; }
.tile:hover::before { opacity: 1; transform: translateX(0) scale(1); }
.tile:hover { background: var(--base); transform: translateY(-1px); }
.tile-icon { width: 46px; height: 46px; margin-bottom: 18px; }
.tile-word {
  font-family: var(--f-dis); font-size: clamp(28px, 2.8vw, 36px); font-weight: 300;
  letter-spacing: -0.02em; display: block; margin-bottom: 11px;
}
.tile:nth-child(1) .tile-word { font-size: clamp(34px, 3.3vw, 44px); }
.tile-desc {
  font-size: clamp(15px, 1.08vw, 16.5px);
  line-height: 1.67;
  color: var(--text-2);
  font-weight: 300;
  max-width: 42ch;
}
.tile:nth-child(1) .tile-desc { max-width: 50ch; }

/* =================================================
   LOOP DIAGRAM - #response  MAJOR REBUILD
   ================================================= */
#response {
  padding: var(--section-y) var(--space-x); position: relative; z-index: 1;
  background:
    linear-gradient(180deg, rgba(25,102,102,0.08) 0%, rgba(25,102,102,0.02) 28%, var(--base) 82%);
}
#response .section-anchor {
  width: 100%;
  max-width: 760px;
  margin: 0 auto 24px;
}
.loop-outer {
  display: flex; flex-direction: column; align-items: center;
  position: relative; z-index: 1;
}
.loop-svg-wrap {
  width: 100%;
  max-width: 760px;
  padding: 20px 22px 14px;
  border: 1px solid var(--stroke-s);
  border-radius: 20px;
  background: linear-gradient(160deg, rgba(255,255,255,0.35), rgba(38,107,67,0.05));
  box-shadow: 0 14px 32px rgba(27,30,27,0.06);
}
#loop-svg { width: 100%; overflow: visible; display: block; }
#loop-svg #path-1-2,
#loop-svg #path-2-3 {
  transition: stroke 320ms var(--ease), filter 320ms var(--ease), stroke-width 320ms var(--ease);
}
.loop-outer.loop-live #path-1-2,
.loop-outer.loop-live #path-2-3 {
  stroke: rgba(38,107,67,0.46);
  stroke-width: 1;
  filter: drop-shadow(0 0 4px rgba(38,107,67,0.18));
  animation: path-breathe 2.8s ease-in-out infinite;
}
.loop-caption {
  margin-top: 20px;
  font-family: var(--f-mono); font-size: 10.5px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--text-3); text-align: center;
}
@keyframes path-breathe {
  0%, 100% { stroke-opacity: 0.72; }
  50% { stroke-opacity: 1; }
}

/* Node ring animations */
@keyframes node-breathe-a { 0%,100%{r:54;opacity:.7} 50%{r:57;opacity:1} }
@keyframes node-breathe-b { 0%,100%{r:38;opacity:.4} 50%{r:41;opacity:.65} }
@keyframes respond-pulse   { 0%,100%{opacity:0;r:68} 50%{opacity:.3;r:80} }

/* Signal pulse glow on Respond node - triggered by JS class */
.respond-glow {
  fill: rgba(38,107,67,0.0);
  transition: fill 400ms var(--ease);
}
.respond-glow.active { fill: rgba(38,107,67,0.1); }

/* =================================================
   USE CASES - #comfort
   ================================================= */
#comfort {
  background:
    linear-gradient(180deg, rgba(201,120,80,0.085) 0%, rgba(201,120,80,0.03) 30%, var(--base-2) 82%);
  padding: var(--section-y) var(--space-x);
}
#comfort,
#privacy {
  position: relative;
  overflow: hidden;
}
#comfort::before {
  content: '';
  position: absolute;
  inset: -20% -14%;
  pointer-events: none;
  background:
    radial-gradient(circle at 15% 40%, rgba(38,107,67,0.22), transparent 44%),
    radial-gradient(circle at 82% 74%, rgba(25,102,102,0.16), transparent 42%);
  filter: blur(54px);
  animation: plume-sweep 18s ease-in-out infinite;
}
#privacy::before {
  content: '';
  position: absolute;
  inset: -16% -12%;
  pointer-events: none;
  background:
    radial-gradient(circle at 80% 22%, rgba(38,107,67,0.16), transparent 46%),
    radial-gradient(circle at 20% 78%, rgba(25,102,102,0.12), transparent 44%);
  filter: blur(48px);
  animation: plume-sweep 22s ease-in-out infinite reverse;
}
#privacy::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.34;
  background:
    radial-gradient(120% 84% at 50% 102%, transparent 60%, rgba(38,107,67,0.13) 61%, transparent 62%) 0 0 / 100% 156px repeat-y;
}
.uc-inner { max-width: 1200px; margin: 0 auto; }
#comfort .uc-inner,
#privacy .diff-hed,
#privacy .diff-chips {
  position: relative;
  z-index: 1;
}
#comfort .section-anchor { margin-bottom: 30px; }
.uc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  grid-template-areas:
    "wellness workplace"
    "wellness research";
  gap: 14px;
  margin-top: 30px;
}
.uc-card {
  background: var(--base); border: 1px solid var(--stroke-s);
  border-radius: var(--r-leaf); padding: 34px 28px 30px;
  position: relative; overflow: hidden;
  transition: all 300ms var(--ease); cursor: default;
}
.uc-card:nth-child(1) {
  grid-area: wellness;
  padding: 42px 34px 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  animation: card-drift 6.2s ease-in-out infinite;
}
.uc-card:nth-child(2) { grid-area: workplace; }
.uc-card:nth-child(3) { grid-area: research; }
.uc-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 80% at 15% 50%,rgba(38,107,67,0.04) 0%,transparent 60%);
  opacity: 0; transition: opacity 360ms;
}
.uc-card::after {
  content: ''; position: absolute; left: 0; top: 50%;
  width: 0; height: 1px;
  background: linear-gradient(90deg, rgba(38,107,67,0.38), transparent);
  transition: width 360ms var(--ease); transform: translateY(-50%);
}
.uc-card:hover::before { opacity: 1; }
.uc-card:hover::after  { width: 65%; }
.uc-card:hover { border-color: var(--stroke-c); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(27,30,27,0.055); }
@keyframes card-drift {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
.uc-cat {
  font-family: var(--f-mono); font-size: 9px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--teal-l);
  margin-bottom: 14px; display: block;
}
.uc-text { font-size: clamp(15px, 1.08vw, 16.5px); line-height: 1.67; color: var(--text-2); font-weight: 300; }

/* =================================================
   EVIDENCE STRIP
   ================================================= */
#platform {
  border-top: 1px solid var(--stroke-s);
  border-bottom: 1px solid var(--stroke-s);
  padding: var(--section-y-tight) var(--space-x);
  background:
    linear-gradient(180deg, rgba(25,102,102,0.045) 0%, rgba(25,102,102,0.015) 32%, var(--base) 84%);
}
#platform .section-anchor .t-kicker { color: var(--amber); }
.chips { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.chips-spaced { margin-top: 14px; }
.chip-label {
  font-family: var(--f-mono); font-size: 9px; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--text-3); margin-right: 8px;
}
.chip {
  font-family: var(--f-mono); font-size: 9.5px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--chloro);
  border: 1px solid rgba(38,107,67,0.26); border-radius: var(--r-pill);
  padding: 6px 14px 7px; background: rgba(38,107,67,0.05);
  white-space: nowrap; transition: all 240ms var(--ease);
}
.chip:hover { background: rgba(38,107,67,0.1); border-color: rgba(38,107,67,0.4); }
.platform-note {
  margin-top: 14px;
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.64;
  color: var(--text-2);
  font-weight: 300;
}

/* =================================================
   DIFFERENTIATOR - #privacy  FIX: static chips only
   ================================================= */
#privacy {
  padding: clamp(46px, 6.5vw, 64px) var(--space-x) clamp(40px, 5.5vw, 54px);
  background:
    linear-gradient(180deg, rgba(25,102,102,0.07) 0%, rgba(25,102,102,0.02) 28%, var(--base) 82%);
}
.diff-hed { margin-bottom: 24px; }
.diff-hed p { max-width: 64ch; }
.privacy-explainer {
  font-size: 14px;
  color: var(--text-3);
  font-weight: 300;
  margin-top: 10px;
  max-width: 560px;
  line-height: 1.65;
}
.diff-chips { display: flex; gap: 10px; flex-wrap: wrap; }
.d-chip {
  font-family: var(--f-body); font-size: 14px; font-weight: 400;
  color: var(--text-2); border: 1px solid var(--stroke);
  border-radius: var(--r-pill); padding: 10px 20px;
  background: var(--base-2);
  transition: border-color 260ms var(--ease), color 260ms var(--ease), background 260ms var(--ease);
  cursor: default;
}
.d-chip:hover { border-color: var(--stroke-c); color: var(--chloro); background: rgba(38,107,67,0.05); }

/* =================================================
   CTA + FAQ - #cta
   FIX: grid-template-rows accordion (no max-height hack)
   ================================================= */
#cta {
  background:
    linear-gradient(180deg, rgba(201,120,80,0.08) 0%, rgba(201,120,80,0.02) 28%, var(--base-2) 80%);
  padding: var(--section-y) var(--space-x);
}
.cta-inner {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.cta-block { margin-bottom: 0; }
.cta-hed  { margin-bottom: 18px; }
.cta-sub  { font-size: clamp(16px, 1.22vw, 18px); color: var(--text-2); font-weight: 300; margin-bottom: 30px; line-height: 1.7; }
.cta-kicker { margin-bottom: 14px; }
.trust-strip {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: -8px 0 22px;
}
.trust-pill {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(38,107,67,0.22);
  background: rgba(38,107,67,0.05);
  color: var(--chloro);
  border-radius: var(--r-pill);
  padding: 7px 12px 8px;
  font-family: var(--f-mono);
  font-size: 8.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.cta-form { max-width: 560px; }
.form-stepper {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.step-dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--stroke);
  color: var(--text-3);
  font-family: var(--f-mono);
  font-size: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.step-dot.is-active {
  border-color: var(--stroke-c);
  color: var(--chloro);
  background: rgba(38,107,67,0.08);
}
.step-line {
  width: 26px;
  height: 1px;
  background: var(--stroke);
}
.form-step {
  opacity: 0;
  transform: translateY(8px);
  max-height: 0;
  overflow: hidden;
  pointer-events: none;
  transition: opacity 240ms var(--ease), transform 280ms var(--ease), max-height 280ms var(--ease);
}
.form-step.is-active {
  opacity: 1;
  transform: translateY(0);
  max-height: 1200px;
  pointer-events: auto;
}
.form-step[hidden] { display: block; }
.cta-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-field span {
  font-family: var(--f-mono);
  font-size: 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.56);
  color: var(--text);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 14px;
  font-family: var(--f-body);
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-3); }
.form-field input:focus-visible,
.form-field select:focus-visible,
.form-field textarea:focus-visible {
  outline: none;
  border-color: var(--stroke-c);
  box-shadow: 0 0 0 2px rgba(38,107,67,0.12);
}
.form-field select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-3) 50%),
    linear-gradient(135deg, var(--text-3) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 2px),
    calc(100% - 12px) calc(50% - 2px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 34px;
}
.form-field textarea {
  resize: vertical;
  min-height: 90px;
}
.form-field-full { grid-column: 1 / -1; }
.field-error {
  font-size: 12px;
  line-height: 1.3;
  color: #9b2e2e;
}
.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] {
  border-color: rgba(155,46,46,0.5);
  box-shadow: 0 0 0 2px rgba(155,46,46,0.08);
}
.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}
.cta-form-actions {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 18px;
}
.cta-form-actions .btn-pri {
  border: 0;
  cursor: pointer;
}
.form-back {
  background: transparent;
  border: none;
  color: var(--text-3);
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 6px 0;
}
.form-back:hover { color: var(--chloro); }
.btn-pri.is-loading {
  opacity: 0.78;
  cursor: wait;
}
.form-inline-error {
  margin-top: 10px;
  font-size: 13px;
  color: #9b2e2e;
}
.form-status {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--chloro);
  border: 1px solid var(--stroke-c);
  background: rgba(38,107,67,0.07);
  border-radius: 8px;
  padding: 10px 12px;
}
.form-note {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-2);
}

.faq-label {
  font-family: var(--f-mono); font-size: 9.5px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--text-3); margin-bottom: 22px;
}
.faq { border-top: 1px solid var(--stroke); }
.faq-item { border-bottom: 1px solid var(--stroke); }
.faq-q {
  width: 100%; background: none; border: none; cursor: pointer;
  padding: 20px 0; display: flex; justify-content: space-between;
  align-items: center; gap: 14px; text-align: left;
}
.faq-q-text {
  font-family: var(--f-body); font-size: 15.5px; font-weight: 400;
  color: var(--text); line-height: 1.45;
}
.faq-icon {
  width: 20px; height: 20px; flex-shrink: 0;
  border: 1px solid var(--stroke); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3); font-size: 15px; line-height: 1;
  transition: all 280ms var(--ease);
  font-family: var(--f-mono);
}
.faq-item.open .faq-icon {
  border-color: var(--stroke-c); color: var(--chloro);
  transform: rotate(45deg);
}

/* FIX: grid-template-rows transition - smooth regardless of content height */
.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 380ms var(--ease);
}
.faq-item.open .faq-a { grid-template-rows: 1fr; }
.faq-a-inner {
  overflow: hidden;
  font-size: 15px; line-height: 1.7; color: var(--text-2);
  font-weight: 300; padding-bottom: 0;
  transition: padding-bottom 380ms var(--ease);
}
.faq-item.open .faq-a-inner { padding-bottom: 20px; }

/* =================================================
   FOOTER
   ================================================= */
footer {
  border-top: 1px solid var(--stroke-s);
  padding: var(--section-y-tight) var(--space-x);
  display: grid; grid-template-columns: 1fr auto;
  gap: 24px; align-items: center;
}
.f-brand {
  font-family: var(--f-dis); font-size: 16px; font-weight: 300;
  letter-spacing: 0.28em; color: var(--text-3); margin-bottom: 5px;
}
.footer-logo-img {
  height: 30px;
  width: auto;
  border-radius: 4px;
  display: block;
  opacity: 0.7;
}
.f-copy {
  font-family: var(--f-mono); font-size: 8.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3);
}
.f-links { display: flex; gap: 22px; }
.f-links a {
  font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase;
  text-decoration: none; color: var(--text-3); transition: color 240ms;
}
.f-links a:hover { color: var(--chloro); }

/* =================================================
   SCROLL REVEAL
   ================================================= */
.rev {
  opacity: 0; transform: translateY(18px);
  transition: opacity 640ms var(--ease), transform 640ms var(--ease);
}
.rev.vis { opacity: 1; transform: translateY(0); }
.d1 { transition-delay: 80ms; }
.d2 { transition-delay: 180ms; }
.d3 { transition-delay: 280ms; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .rev {
    opacity: 1 !important;
    transform: translateY(0) !important;
  }
  .hero-signal-strip span,
  .btn-pri::after,
  .uc-card:nth-child(1),
  .hero-drift-layer {
    animation: none !important;
  }
  .hero-drift-layer { opacity: 0.26 !important; }
  .mem::after { animation: none !important; opacity: 0.08 !important; }
  #comfort::before,
  #privacy::before { animation: none !important; opacity: 0.2; }
  .form-step { transition: none !important; }
  .scroll-cue { display: none; }
}

/* =================================================
   RESPONSIVE
   ================================================= */
@media (max-width: 860px) {
  body.nav-open { overflow: hidden; }
  body { font-size: 17px; }
  h1.t-dis { font-size: clamp(34px, 8.8vw, 52px); line-height: 1.1; }
  h2.t-dis { font-size: clamp(26px, 6.6vw, 40px); line-height: 1.12; }
  .site-nav { padding: 0 20px; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: inline-flex; }
  #hero { padding: 90px 24px 70px; }
  .hero-drift {
    inset: 88px 8px 20px 8px;
    opacity: 0.62;
  }
  .hero-sub { font-size: 16px; line-height: 1.58; max-width: 34ch; }
  .hero-signal-strip {
    width: min(320px, 84vw);
    margin-bottom: 20px;
  }
  .hero-membrane { display: none; }
  .scroll-cue { display: none; }
  #about-brief { padding: 12px 24px 8px; }
  .about-brief-line { font-size: 16.8px; line-height: 1.56; max-width: 50ch; }
  .vdiv { padding: 0 24px; }
  #signals .section-anchor {
    padding: 44px 24px 14px;
  }
  .section-sub { font-size: 14.5px; line-height: 1.58; }
  #signals, .tiles-grid { display: block; }
  .tile-word { font-size: 24px; margin-bottom: 8px; }
  .tile-desc { font-size: 14.5px; line-height: 1.58; }
  .tile { border-right: none; border-bottom: 1px solid var(--stroke-s); }
  #response .section-anchor { margin-bottom: 16px; }
  .loop-caption { font-size: 9.5px; letter-spacing: 0.16em; }
  #response { padding: 64px 24px; }
  #comfort { padding: 64px 24px; }
  #comfort .section-anchor { margin-bottom: 20px; }
  .uc-text { font-size: 14.8px; line-height: 1.58; }
  .uc-grid {
    grid-template-columns: 1fr;
    grid-template-areas: none;
  }
  .uc-card:nth-child(1),
  .uc-card:nth-child(2),
  .uc-card:nth-child(3) {
    grid-area: auto;
  }
  .uc-card:nth-child(1) {
    padding: 34px 28px 30px;
  }
  #platform { padding: 28px 24px; }
  .section-title-sm { font-size: clamp(21px, 6vw, 28px); }
  #privacy { padding: 52px 24px 42px; }
  #cta { padding: 64px 24px; }
  .cta-sub { font-size: 16px; line-height: 1.58; }
  .trust-strip { margin-top: -4px; margin-bottom: 18px; }
  .cta-form-grid { grid-template-columns: 1fr; }
  .faq-q-text { font-size: 15px; }
  .faq-a-inner { font-size: 14.5px; line-height: 1.62; }
  footer { grid-template-columns: 1fr; padding: 30px 24px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .nav-sub { display: none; }
  h1.t-dis { font-size: clamp(30px, 10vw, 44px); }
  h2.t-dis { font-size: clamp(24px, 8vw, 34px); }
  .hero-sub { font-size: 15px; }
  .about-brief-line { font-size: 15.5px; }
  .section-title-sm { font-size: clamp(20px, 7.5vw, 26px); }
}