/* ==== Calmence.com — styles ==== */

:root {
  --obsidian: #0A0D12;
  --obsidian-deep: #07090D;
  --surface: #121826;
  --surface-2: #1A2134;
  --surface-3: #232B40;
  --moonstone: #E6EAF2;
  --muted: rgba(230, 234, 242, 0.68);
  --faint: rgba(230, 234, 242, 0.55);
  --ghost: rgba(230, 234, 242, 0.18);
  --hairline: rgba(230, 234, 242, 0.08);
  --hairline-strong: rgba(230, 234, 242, 0.14);
  --inhale: oklch(0.80 0.08 210);
  --inhale-soft: oklch(0.80 0.08 210 / 0.18);
  --exhale: oklch(0.78 0.07 25);
  --exhale-soft: oklch(0.78 0.07 25 / 0.18);
  --coherence: oklch(0.75 0.09 155);

  --display: 'Fraunces', 'Iowan Old Style', Georgia, serif;
  --ui: 'Inter Tight', -apple-system, system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;

  --page-max: 1280px;
  --gutter: 40px;
}

:focus-visible {
  outline: 2px solid var(--inhale, oklch(0.78 0.10 210));
  outline-offset: 3px;
  border-radius: 3px;
}
/* kill default outline only when we're showing focus-visible */
:focus:not(:focus-visible) { outline: none; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--moonstone, #E6EAF2);
  color: var(--obsidian, #0A0D12);
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  text-decoration: none;
}
.skip-link:focus { left: 8px; }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { background: var(--obsidian-deep); }
body {
  font-family: var(--ui);
  color: var(--moonstone);
  background: var(--obsidian);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--inhale-soft); color: var(--moonstone); }

a { color: inherit; text-decoration: none; }
button { font-family: var(--ui); cursor: pointer; border: 0; background: transparent; color: inherit; }

.container {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  position: relative;
}

/* ==== nav ==== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 22px 0;
  transition: background 0.6s ease, backdrop-filter 0.6s ease, border-color 0.6s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(10, 13, 18, 0.72);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom-color: var(--hairline);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--display);
  font-weight: 300;
  font-size: 22px;
  letter-spacing: -0.02em;
}
.brand em { font-style: italic; font-weight: 300; }
.brand-orb {
  width: 26px; height: 26px;
  border-radius: 999px;
  background: radial-gradient(circle at 38% 36%, #fff 0%, oklch(0.78 0.10 210) 35%, oklch(0.50 0.12 220) 100%);
  box-shadow: 0 0 22px oklch(0.78 0.10 210 / 0.35);
}
.nav-links {
  display: flex;
  gap: 36px;
  font-size: 14px;
  color: var(--muted);
}
.nav-links a { transition: color 0.3s; }
.nav-links a:hover { color: var(--moonstone); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  min-height: 44px;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  font-size: 14px;
  transition: border-color 0.3s, background 0.3s;
}
.nav-cta:hover { border-color: var(--moonstone); background: rgba(230,234,242,0.04); }

@media (max-width: 780px) {
  .nav-links { display: none; }
}

/* ==== hero ==== */
.hero {
  position: relative;
  min-height: 100vh;
  padding-top: 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 80px;
  align-items: center;
}
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
}

.eyebrow {
  font-family: var(--ui);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--faint);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: ''; width: 24px; height: 1px;
  background: currentColor; opacity: 0.6;
}

.hero h1 {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 28px 0 0;
  color: var(--moonstone);
}
.hero h1 em {
  font-style: italic;
  font-weight: 300;
  background: linear-gradient(180deg, oklch(0.85 0.10 210), oklch(0.70 0.08 210));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lede {
  font-size: 19px;
  line-height: 1.55;
  color: var(--muted);
  max-width: 520px;
  margin: 28px 0 0;
}
.hero .cta-row {
  display: flex;
  gap: 16px;
  margin-top: 40px;
  flex-wrap: wrap;
  align-items: center;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 26px;
  background: var(--moonstone);
  color: var(--obsidian);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  transition: transform 0.4s cubic-bezier(0.2,0.8,0.2,1), box-shadow 0.4s;
  box-shadow: 0 4px 30px oklch(0.78 0.10 210 / 0.2);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 40px oklch(0.78 0.10 210 / 0.35); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 22px;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  font-size: 15px;
  color: var(--moonstone);
  transition: border-color 0.3s, background 0.3s;
}
.btn-ghost:hover { border-color: var(--moonstone); background: rgba(230,234,242,0.04); }

.hero .sync-line {
  display: flex;
  gap: 18px;
  margin-top: 48px;
  color: var(--faint);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-family: var(--mono);
  align-items: center;
}
.sync-dot {
  width: 6px; height: 6px; border-radius: 999px;
  background: var(--coherence);
  box-shadow: 0 0 10px var(--coherence);
  animation: syncPulse 10s linear infinite;
}
@keyframes syncPulse {
  0%, 50% { opacity: 0.4; transform: scale(0.8); }
  25% { opacity: 1; transform: scale(1.3); }
  75% { opacity: 0.8; transform: scale(1); }
}

/* ==== hero pacer ==== */
.pacer-stage {
  position: relative;
  aspect-ratio: 1;
  max-width: 520px;
  margin: 0 auto;
  width: 100%;
}
.pacer-ring-outer,
.pacer-ring-mid,
.pacer-orb {
  position: absolute; inset: 0;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.pacer-ring-outer {
  border: 1px solid var(--hairline);
}
.pacer-ring-mid {
  margin: 12%;
  border: 1px solid var(--hairline-strong);
}
.pacer-orb {
  margin: 26%;
  background: radial-gradient(circle at 38% 36%, #fff 0%, oklch(0.78 0.12 210) 35%, oklch(0.45 0.14 225) 100%);
  box-shadow:
    0 0 80px oklch(0.78 0.12 210 / 0.35),
    inset 0 0 40px oklch(0.90 0.08 210 / 0.4);
  /* Breath: 10s inhale-exhale cycle = 0.1 Hz resonance */
  animation: breath 10s cubic-bezier(0.45, 0, 0.55, 1) infinite, breathColor 10s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}
@keyframes breath {
  0%   { transform: scale(0.62); }
  50%  { transform: scale(1.12); }
  100% { transform: scale(0.62); }
}
/* Color shift sits AROUND the turnaround: cyan holds through inhale,
   warms through exhale, and rests blue at the bottom of the cycle.
   Keyframes aren't linear — they ease the transition into the phase
   change rather than crossing it during scale extremes. */
@keyframes breathColor {
  0% {
    background: radial-gradient(circle at 38% 36%, #fff 0%, oklch(0.78 0.12 210) 35%, oklch(0.45 0.14 225) 100%);
    box-shadow: 0 0 80px oklch(0.78 0.12 210 / 0.35), inset 0 0 40px oklch(0.90 0.08 210 / 0.4);
  }
  35% {
    background: radial-gradient(circle at 38% 36%, #fff 0%, oklch(0.79 0.11 150) 35%, oklch(0.47 0.13 180) 100%);
    box-shadow: 0 0 85px oklch(0.78 0.11 150 / 0.38), inset 0 0 40px oklch(0.90 0.08 150 / 0.42);
  }
  55% {
    background: radial-gradient(circle at 38% 36%, #fff 0%, oklch(0.80 0.11 30) 35%, oklch(0.48 0.13 20) 100%);
    box-shadow: 0 0 95px oklch(0.78 0.11 30 / 0.45), inset 0 0 40px oklch(0.90 0.08 30 / 0.48);
  }
  85% {
    background: radial-gradient(circle at 38% 36%, #fff 0%, oklch(0.78 0.11 90) 35%, oklch(0.46 0.13 120) 100%);
    box-shadow: 0 0 85px oklch(0.78 0.11 90 / 0.38), inset 0 0 40px oklch(0.90 0.08 120 / 0.42);
  }
  100% {
    background: radial-gradient(circle at 38% 36%, #fff 0%, oklch(0.78 0.12 210) 35%, oklch(0.45 0.14 225) 100%);
    box-shadow: 0 0 80px oklch(0.78 0.12 210 / 0.35), inset 0 0 40px oklch(0.90 0.08 210 / 0.4);
  }
}
.pacer-hint {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  color: var(--moonstone);
  font-family: var(--display);
  font-weight: 300;
  font-size: 28px;
  letter-spacing: -0.02em;
  pointer-events: none;
  mix-blend-mode: screen;
}
.pacer-hint .word {
  opacity: 0.9;
  transition: opacity 0.6s ease, color 1.2s ease, transform 0.6s ease;
}
.pacer-hint .word[data-phase="inhale"] { color: oklch(0.88 0.08 210); }
.pacer-hint .word[data-phase="exhale"] { color: oklch(0.82 0.09 30); }

.pacer-meter {
  position: absolute;
  bottom: -48px;
  left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--faint);
  text-transform: uppercase;
}
.pacer-meter .val { color: var(--moonstone); font-feature-settings: 'tnum'; }

/* ==== sections ==== */
.section {
  padding: 140px 0;
  position: relative;
}
.section-head {
  max-width: 780px;
  margin-bottom: 80px;
}
.section h2 {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 24px 0 0;
}
.section h2 em {
  font-style: italic;
  color: var(--inhale);
}
.section-lede {
  font-size: 19px;
  color: var(--muted);
  margin-top: 24px;
  max-width: 620px;
  line-height: 1.6;
}

/* ==== marquee / breath-scroll ==== */
.breath-marquee {
  padding: 32px 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
  position: relative;
}
.breath-marquee-track {
  display: flex;
  gap: 64px;
  animation: marquee 80s linear infinite;
  white-space: nowrap;
  font-family: var(--display);
  font-weight: 300;
  font-style: italic;
  font-size: 28px;
  color: var(--faint);
  letter-spacing: -0.01em;
}
.breath-marquee-track span { display: inline-flex; align-items: center; gap: 64px; }
.breath-marquee-track span::after {
  content: ''; width: 6px; height: 6px; border-radius: 999px; background: var(--inhale); opacity: 0.6;
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ==== science ==== */
.sci-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
@media (max-width: 900px) { .sci-grid { grid-template-columns: 1fr; gap: 48px; } }

.sci-stack { display: grid; gap: 32px; }
.sci-card {
  border: 1px solid var(--hairline);
  border-radius: 20px;
  padding: 32px;
  background: linear-gradient(180deg, rgba(230,234,242,0.015), rgba(230,234,242,0));
  transition: border-color 0.4s, background 0.4s;
}
.sci-card:hover { border-color: var(--hairline-strong); }
.sci-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.18em;
  margin-bottom: 12px;
}
.sci-title {
  font-family: var(--display);
  font-weight: 300;
  font-size: 26px;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 10px;
}
.sci-body {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.hrv-chart {
  border: 1px solid var(--hairline);
  border-radius: 24px;
  padding: 32px;
  position: sticky;
  top: 120px;
}
.hrv-chart-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--faint);
  text-transform: uppercase;
}
.hrv-chart-main {
  font-family: var(--display);
  font-weight: 300;
  font-size: 42px;
  margin: 12px 0 4px;
  letter-spacing: -0.02em;
}
.hrv-chart-sub {
  color: var(--muted);
  font-size: 13px;
}
.hrv-chart-legend {
  display: flex;
  gap: 24px;
  margin-top: 24px;
  font-size: 12px;
  color: var(--muted);
}
.hrv-legend-item { display: inline-flex; align-items: center; gap: 8px; }
.hrv-legend-dot { width: 8px; height: 8px; border-radius: 2px; }

/* ==== method / the practice ==== */
.method {
  background: var(--obsidian-deep);
}
.method-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
}
@media (max-width: 980px) { .method-grid { grid-template-columns: 1fr; gap: 60px; } }

.steps { display: grid; gap: 2px; }
.step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--hairline);
  align-items: start;
}
.step:last-child { border-bottom: 1px solid var(--hairline); }
.step-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
  padding-top: 6px;
}
.step-title {
  font-family: var(--display);
  font-weight: 300;
  font-size: 26px;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.step-body {
  color: var(--muted);
  font-size: 15px;
  margin-top: 8px;
  line-height: 1.65;
}

/* device mock */
.device-mock {
  position: relative;
  aspect-ratio: 9/19.5;
  max-width: 340px;
  margin: 0 auto;
  border-radius: 44px;
  background: linear-gradient(180deg, #1a2030 0%, #0d1118 100%);
  border: 1px solid var(--hairline-strong);
  padding: 12px;
  box-shadow:
    0 40px 80px -30px rgba(0,0,0,0.8),
    0 0 0 1px rgba(230,234,242,0.04);
}
.device-screen {
  width: 100%;
  height: 100%;
  border-radius: 34px;
  background: radial-gradient(circle at 50% 50%, #0f1420 0%, #06080d 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 40px 24px;
}
.device-orb {
  width: 50%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 36%, #fff 0%, oklch(0.78 0.12 210) 35%, oklch(0.45 0.14 225) 100%);
  box-shadow: 0 0 60px oklch(0.78 0.12 210 / 0.35);
  animation: breath 10s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}
.device-word {
  font-family: var(--display);
  font-weight: 300;
  font-size: 22px;
  color: var(--moonstone);
  letter-spacing: -0.02em;
}
.device-meta {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--faint);
  letter-spacing: 0.24em;
  text-transform: uppercase;
}
.device-meta .val { color: var(--moonstone); }

/* ==== evidence ==== */
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  border: 1px solid var(--hairline);
  border-radius: 24px;
  overflow: hidden;
  background: var(--hairline);
}
@media (max-width: 900px) { .evidence-grid { grid-template-columns: 1fr; } }
.evi-card {
  background: var(--obsidian);
  padding: 40px 32px;
}
.evi-num {
  font-family: var(--display);
  font-weight: 300;
  font-size: 68px;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(180deg, oklch(0.88 0.10 210), oklch(0.65 0.10 215));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.evi-num sup { font-size: 22px; font-feature-settings: 'sups'; vertical-align: super; color: var(--faint); -webkit-text-fill-color: var(--faint); }
.evi-label { margin-top: 16px; color: var(--moonstone); font-size: 16px; line-height: 1.4; }
.evi-src { margin-top: 12px; color: var(--faint); font-size: 12px; font-family: var(--mono); }

.citations {
  margin-top: 60px;
  display: grid;
  gap: 20px;
  max-width: 880px;
}
.citation {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 24px;
  padding: 20px 0;
  border-top: 1px solid var(--hairline);
  align-items: baseline;
  font-size: 14px;
}
.citation:last-child { border-bottom: 1px solid var(--hairline); }
.citation-idx { font-family: var(--mono); color: var(--faint); font-size: 12px; }
.citation-title { color: var(--moonstone); }
.citation-title em { color: var(--muted); font-style: italic; }
.citation-meta { color: var(--faint); font-family: var(--mono); font-size: 12px; white-space: nowrap; }

/* ==== audience / for-who ==== */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 980px) { .audience-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .audience-grid { grid-template-columns: 1fr; } }
.aud-card {
  border: 1px solid var(--hairline);
  border-radius: 20px;
  padding: 28px;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.4s, transform 0.6s;
}
.aud-card:hover { border-color: var(--hairline-strong); transform: translateY(-4px); }
.aud-glyph {
  font-family: var(--display);
  font-weight: 300;
  font-style: italic;
  font-size: 40px;
  line-height: 1;
  background: linear-gradient(180deg, oklch(0.85 0.10 210), oklch(0.65 0.08 215));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  letter-spacing: -0.02em;
}
.aud-title {
  font-family: var(--display);
  font-weight: 300;
  font-size: 22px;
  margin-top: 60px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.aud-body { color: var(--muted); font-size: 14px; margin-top: 10px; line-height: 1.55; }

/* ==== pricing ==== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) { .pricing-grid { grid-template-columns: 1fr; } }
.price-card {
  border: 1px solid var(--hairline);
  border-radius: 24px;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
  transition: border-color 0.4s, background 0.4s;
}
.price-card.feature {
  border-color: var(--inhale-soft);
  background: linear-gradient(180deg, oklch(0.78 0.08 210 / 0.04), transparent);
  padding-top: 56px;
}
.price-name { font-size: 13px; letter-spacing: 0.18em; color: var(--faint); text-transform: uppercase; font-family: var(--mono); }
.price-amount {
  font-family: var(--display);
  font-weight: 300;
  font-size: 56px;
  letter-spacing: -0.03em;
  line-height: 1;
}
.price-amount small { font-size: 16px; color: var(--muted); font-family: var(--ui); letter-spacing: 0; font-weight: 400; margin-left: 6px; }
.price-desc { color: var(--muted); font-size: 15px; line-height: 1.5; }
.price-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; font-size: 14px; color: var(--muted); }
.price-list li { display: grid; grid-template-columns: 14px 1fr; gap: 12px; align-items: start; line-height: 1.5; }
.price-list li::before {
  content: '';
  display: block;
  width: 10px; height: 10px;
  margin-top: 7px;
  border-radius: 999px;
  background: var(--inhale-soft);
  border: 1px solid var(--inhale);
  flex-shrink: 0;
}
.price-cta {
  margin-top: auto;
  padding: 14px 20px;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  text-align: center;
  font-size: 14px;
  transition: border-color 0.3s, background 0.3s, color 0.3s;
}
.price-cta:hover { border-color: var(--moonstone); }
.price-card.feature .price-cta {
  background: var(--moonstone);
  color: var(--obsidian);
  border-color: var(--moonstone);
}
.price-card.feature .price-cta:hover { background: transparent; color: var(--moonstone); }
.price-badge {
  position: absolute; top: 20px; left: 32px;
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--inhale);
  background: var(--inhale-soft);
  padding: 6px 10px; border-radius: 999px;
}

/* ==== quote / pull ==== */
.pull {
  padding: 160px 0;
  text-align: center;
}
.pull-mark {
  font-family: var(--display);
  font-style: italic;
  font-weight: 300;
  font-size: 120px;
  line-height: 1;
  color: var(--inhale);
  opacity: 0.6;
}
.pull-text {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(30px, 4vw, 52px);
  letter-spacing: -0.02em;
  line-height: 1.2;
  max-width: 960px;
  margin: 24px auto 0;
}
.pull-text em { font-style: italic; color: var(--inhale); }
.pull-attr {
  margin-top: 32px;
  font-size: 13px;
  color: var(--faint);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-family: var(--mono);
}

/* ==== faq ==== */
.faq-list { display: grid; gap: 2px; margin-top: 60px; }
.faq-item {
  border-top: 1px solid var(--hairline);
  padding: 28px 0;
}
.faq-item:last-child { border-bottom: 1px solid var(--hairline); }
.faq-q {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
  text-align: left;
  cursor: pointer;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--display);
  font-weight: 300;
  font-size: 22px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  user-select: none;
}
.faq-sign {
  font-family: var(--mono); font-size: 14px; color: var(--faint);
  transition: transform 0.4s, color 0.4s;
  flex-shrink: 0;
}
.faq-item.open .faq-sign { transform: rotate(45deg); color: var(--inhale); }
.faq-a {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
  max-width: 780px;
  padding-top: 12px;
}
.faq-a[hidden] { display: none !important; }

/* ==== final cta ==== */
.final-cta {
  padding: 160px 0 120px;
  text-align: center;
  border-top: 1px solid var(--hairline);
  position: relative;
  overflow: hidden;
}
.final-cta::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, oklch(0.78 0.12 210 / 0.12), transparent 60%);
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
}
.final-cta h2 {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(44px, 7vw, 88px);
  letter-spacing: -0.035em;
  line-height: 1.02;
  max-width: 920px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.final-cta h2 em { font-style: italic; color: var(--inhale); }
.final-cta .cta-row { justify-content: center; margin-top: 48px; }

/* ==== footer ==== */
.footer {
  border-top: 1px solid var(--hairline);
  padding: 80px 0 60px;
  background: var(--obsidian-deep);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-brand { display: grid; gap: 16px; max-width: 320px; }
.footer-tag { color: var(--muted); font-size: 14px; line-height: 1.55; }
.footer-col h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--faint);
  text-transform: uppercase;
  margin: 0 0 20px;
  font-weight: 500;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; font-size: 14px; color: var(--muted); }
.footer-col li a { transition: color 0.3s; }
.footer-col li a:hover { color: var(--moonstone); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid var(--hairline);
  font-size: 12px;
  color: var(--faint);
  flex-wrap: wrap;
  gap: 16px;
}
.footer-bottom .disclaim { max-width: 640px; font-style: italic; }

/* ==== utils ==== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 1.2s var(--ease, cubic-bezier(0.2,0.8,0.2,1)), transform 1.2s var(--ease, cubic-bezier(0.2,0.8,0.2,1)); }
.reveal.in { opacity: 1; transform: none; }

.grid-backdrop {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image:
    linear-gradient(var(--hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--hairline) 1px, transparent 1px);
  background-size: 120px 120px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

/* ==== mobile nav ==== */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--hairline-strong);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: transparent;
  cursor: pointer;
}
.nav-toggle span {
  width: 16px; height: 1px;
  background: var(--moonstone);
  transition: transform 0.4s, opacity 0.3s;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(3px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { transform: translateY(-3px) rotate(-45deg); }
.nav-drawer {
  position: fixed;
  inset: 70px 0 0 0;
  background: rgba(10, 13, 18, 0.98);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  padding: 48px var(--gutter);
  display: none;
  flex-direction: column;
  gap: 24px;
  z-index: 49;
  animation: drawerIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.nav-drawer[hidden] { display: none !important; }
@keyframes drawerIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }
.nav-drawer a {
  font-family: var(--display);
  font-weight: 300;
  font-size: 28px;
  letter-spacing: -0.02em;
  color: var(--moonstone);
}
.nav-drawer a.drawer-cta {
  margin-top: 24px;
  padding: 16px 0;
  border-top: 1px solid var(--hairline);
  font-family: var(--ui);
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--inhale);
}
body.nav-open { overflow: hidden; }

@media (max-width: 780px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-drawer:not([hidden]) { display: flex; }
}

/* ==== dosing ==== */
.dosing-section { background: var(--obsidian-deep); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.dosing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--hairline);
  border-radius: 24px;
  overflow: hidden;
  background: var(--hairline);
}
@media (max-width: 900px) { .dosing-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .dosing-grid { grid-template-columns: 1fr; } }
.dose-card {
  background: var(--obsidian);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: background 0.5s;
}
.dose-card:hover { background: linear-gradient(180deg, rgba(230,234,242,0.02), transparent), var(--obsidian); }
.dose-kicker {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--faint);
}
.dose-metric {
  font-family: var(--display);
  font-weight: 300;
  font-size: 84px;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--moonstone);
  background: linear-gradient(180deg, var(--moonstone), oklch(0.70 0.04 215));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.dose-unit {
  font-size: 18px;
  font-family: var(--ui);
  font-weight: 400;
  color: var(--muted);
  margin-left: 8px;
  letter-spacing: 0;
  -webkit-text-fill-color: var(--muted);
}
.dose-body { color: var(--muted); font-size: 13px; line-height: 1.6; margin-top: auto; }
.dose-body em { color: var(--moonstone); font-style: italic; }
.dose-footnote {
  margin-top: 40px;
  padding: 24px 32px;
  border: 1px solid var(--hairline);
  border-radius: 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
  background: linear-gradient(90deg, oklch(0.75 0.09 155 / 0.04), transparent);
  border-left: 2px solid var(--coherence);
}
.dose-footnote strong { color: var(--moonstone); font-weight: 500; }

/* ==== pacer trace ring (hero) ==== */
.pacer-trace {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.9;
  animation: traceSpin 60s linear infinite;
}
@keyframes traceSpin { to { transform: rotate(360deg); } }
.pacer-hint .word-sub {
  display: block;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--faint);
  font-feature-settings: 'tnum';
}

/* ==== before/after HRV compare ==== */
.hrv-compare { display: grid; gap: 28px; margin-top: 28px; }
.hrv-compare-row { display: grid; gap: 10px; }
.hrv-compare-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.hrv-compare-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faint);
  padding: 4px 10px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
}
.hrv-compare-tag--active {
  color: var(--coherence);
  border-color: var(--coherence);
  background: rgba(0,0,0,0);
  box-shadow: 0 0 24px oklch(0.75 0.09 155 / 0.15);
}
.hrv-compare-sub {
  font-size: 12px;
  color: var(--muted);
  font-family: var(--ui);
}
.hrv-compare-svg {
  width: 100%;
  height: 80px;
  display: block;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(230,234,242,0.015), transparent);
}
.hrv-compare-row--after .hrv-compare-svg { border-color: oklch(0.75 0.09 155 / 0.22); }

/* ==== compare: vs generic apps ==== */
.compare-section { background: var(--obsidian-deep); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.compare-table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--hairline);
  border-radius: 24px;
  overflow: hidden;
}
@media (max-width: 780px) { .compare-table { grid-template-columns: 1fr; } }
.compare-col {
  padding: 36px 32px;
  background: var(--obsidian);
}
.compare-col--generic { color: var(--muted); opacity: 0.75; border-right: 1px solid var(--hairline); }
@media (max-width: 780px) { .compare-col--generic { border-right: 0; border-bottom: 1px solid var(--hairline); } }
.compare-col--us {
  background: linear-gradient(180deg, oklch(0.75 0.09 155 / 0.04), transparent 60%), var(--obsidian);
}
.compare-head {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--hairline);
}
.compare-head--us { color: var(--coherence); }
.compare-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; font-size: 15px; line-height: 1.5; }
.compare-col li { display: grid; grid-template-columns: 24px 1fr; gap: 10px; align-items: start; }
.compare-col .x { color: var(--faint); font-family: var(--mono); padding-top: 2px; }
.compare-col .check { color: var(--coherence); font-family: var(--mono); font-weight: 500; padding-top: 2px; }

/* ==== first session ==== */
.first-section { padding-top: 100px; }
.first-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 20px;
  position: relative;
}
@media (max-width: 900px) { .first-grid { grid-template-columns: 1fr 1fr; gap: 40px; } }
@media (max-width: 560px) { .first-grid { grid-template-columns: 1fr; } }
.first-grid::before {
  content: '';
  position: absolute;
  top: 44px; left: 0; right: 0;
  height: 1px;
  background: var(--hairline);
  z-index: 0;
}
@media (max-width: 900px) { .first-grid::before { display: none; } }
.first-step {
  position: relative;
  padding-top: 72px;
  z-index: 1;
}
.first-time {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--faint);
  margin-bottom: 0;
}
.first-tick {
  position: absolute;
  top: 38px; left: 0;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--obsidian);
  border: 1px solid var(--hairline-strong);
  z-index: 2;
}
.first-tick::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--coherence);
  opacity: 0.6;
}
.first-tick--final::after { background: var(--inhale); opacity: 1; box-shadow: 0 0 14px var(--inhale); }
.first-title {
  font-family: var(--display);
  font-weight: 300;
  font-size: 22px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 16px 0 10px;
}
.first-body { color: var(--muted); font-size: 14px; line-height: 1.6; }
.first-body em { color: var(--moonstone); font-style: italic; }
.first-cta { margin-top: 60px; text-align: center; }

/* ==== voices ==== */
.voices-section { background: var(--obsidian-deep); border-top: 1px solid var(--hairline); }
.voices-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) { .voices-grid { grid-template-columns: 1fr; } }
.voice-card {
  margin: 0;
  padding: 36px 32px;
  border: 1px solid var(--hairline);
  border-radius: 20px;
  background: var(--obsidian);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 32px;
  min-height: 320px;
  transition: border-color 0.5s, transform 0.6s;
}
.voice-card:hover { border-color: var(--hairline-strong); transform: translateY(-4px); }
.voice-quote {
  font-family: var(--display);
  font-weight: 300;
  font-size: 20px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--moonstone);
  margin: 0;
  text-wrap: pretty;
}
.voice-quote::before {
  content: '“';
  display: block;
  font-size: 48px;
  line-height: 0.8;
  color: var(--inhale);
  opacity: 0.6;
  margin-bottom: 12px;
  font-style: italic;
}
.voice-attr { display: flex; align-items: center; gap: 14px; }
.voice-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, oklch(0.55 0.07 215), oklch(0.35 0.08 230));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--moonstone);
  flex-shrink: 0;
}
.voice-name { font-size: 14px; color: var(--moonstone); }
.voice-role { font-size: 12px; color: var(--faint); margin-top: 2px; font-family: var(--mono); letter-spacing: 0.02em; }
.voices-note {
  margin-top: 32px;
  font-size: 12px;
  color: var(--faint);
  font-style: italic;
  max-width: 640px;
}

/* citation links inline */
.cite-link {
  color: var(--inhale);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.72em;
  vertical-align: super;
  padding: 0 2px;
  opacity: 0.75;
  transition: opacity 0.3s;
}
.cite-link:hover { opacity: 1; text-decoration: underline; }
.cite-link sup { font-size: inherit; }
.citation-title a.cite-ext {
  color: var(--inhale);
  font-family: var(--mono);
  font-size: 11px;
  margin-left: 8px;
  opacity: 0.75;
  text-decoration: none;
  white-space: nowrap;
}
.citation-title a.cite-ext:hover { opacity: 1; text-decoration: underline; }
.evi-src a.cite-link { font-family: var(--mono); font-size: 11px; vertical-align: baseline; padding-left: 4px; }
:target { scroll-margin-top: 100px; }
:target.citation { background: rgba(230,234,242,0.03); }

/* reduce motion */
@media (prefers-reduced-motion: reduce) {
  .pacer-orb, .device-orb { animation: none !important; transform: scale(0.9); background: radial-gradient(circle at 38% 36%, #fff 0%, oklch(0.78 0.12 210) 35%, oklch(0.45 0.14 225) 100%) !important; }
  .breath-marquee-track,
  .breath-marquee-track * { animation: none !important; }
  .sync-dot { animation: none !important; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Wordmark logo (replaces .brand-orb + text) ---- */
.brand { display: inline-flex; align-items: center; gap: 0; }
.brand-wordmark { display: block; height: 44px; width: auto; margin: -8px 0; }
.brand-wordmark--lg { height: 64px; margin: -12px 0; }
@media (max-width: 640px) {
  .brand-wordmark { height: 38px; margin: -6px 0; }
  .brand-wordmark--lg { height: 52px; margin: -10px 0; }
}

/* ---- Pacer illustration tag (non-telemetry disclosure) ---- */
.pacer-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint, rgba(230,234,242,0.55));
  border: 1px solid var(--faint, rgba(230,234,242,0.55));
  border-radius: 999px;
  vertical-align: middle;
}

/* ---- Legal pages (privacy.html, terms.html) ---- */
.legal { padding: 120px 0 80px; min-height: 100vh; }
.legal__inner { max-width: 680px; margin: 0 auto; padding: 0 24px; }
.legal__inner h1 {
  font-family: var(--serif, 'Fraunces', Georgia, serif);
  font-weight: 300;
  font-size: clamp(36px, 5vw, 56px);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.legal__inner h2 { font-size: 20px; font-weight: 500; margin: 40px 0 12px; letter-spacing: -0.01em; }
.legal__inner p, .legal__inner li { font-size: 16px; line-height: 1.65; color: var(--muted, rgba(230,234,242,0.68)); }
.legal__inner ul { padding-left: 20px; margin: 12px 0 20px; }
.legal__inner a { color: var(--moonstone, #E6EAF2); text-decoration: underline; text-underline-offset: 3px; }
.legal__inner a:hover { text-decoration-thickness: 2px; }
.legal__crumb { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint, rgba(230,234,242,0.55)); margin-bottom: 24px; }
.legal__crumb a { color: inherit; text-decoration: none; border-bottom: 1px solid currentColor; }
.legal__meta { font-size: 13px; color: var(--faint, rgba(230,234,242,0.55)); margin: 0 0 40px; }
.legal__note { margin-top: 48px; padding: 20px 24px; border: 1px solid rgba(230,234,242,0.12); border-radius: 12px; font-size: 14px; color: var(--muted, rgba(230,234,242,0.68)); }
.legal__footer { margin-top: 64px; padding-top: 32px; border-top: 1px solid rgba(230,234,242,0.12); display: flex; gap: 24px; flex-wrap: wrap; font-size: 14px; }
.legal__footer a { color: var(--muted, rgba(230,234,242,0.68)); text-decoration: none; }
.legal__footer a:hover { color: var(--moonstone, #E6EAF2); }