/*
 * TAO landing page
 *
 * Token source: design_system/styles.css
 *   fonts → colors → typography → spacing → radii/shadows → motion
 *
 * This file contains composition and responsive geometry only. Brand values
 * come from the published design-system custom properties wherever available.
 */

/* Foundations */
* {
  box-sizing: border-box;
}

:root {
  scroll-behavior: smooth;
  scroll-padding-top: 18px;
}

html,
body {
  margin: 0;
  min-width: 320px;
  background: var(--surface-page);
}

body,
button,
input,
select {
  font-family: var(--font-sans);
}

body {
  color: var(--text-title);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  
}

button,
input,
select,
summary {
  font: inherit;
}

img {
  display: block;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 38%, transparent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  background: var(--surface-invert);
  color: var(--text-on-invert);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: none;
}

.svg-defs {
  position: absolute;
}

.page-frame {
  display: flex;
  justify-content: center;
  overflow-x: clip;
  background: var(--surface-page);
}

.page-surface {
  position: relative;
  width: var(--page-width);
  min-width: var(--page-width);
  flex: none;
  overflow: hidden;
  background: var(--surface-page);
}

/* Navigation */
.reference-nav {
  position: relative;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 26px 48px 0;
  animation: taoUp .6s ease-out both;
}

.nav-left,
.nav-right,
.desktop-links {
  display: flex;
  align-items: center;
}

.nav-left {
  gap: 28px;
}

.brand-mark,
.brand-mark img {
  width: 110px;
  height: 110px;
}

.brand-mark img {
  border-radius: 80px;
}

.desktop-links {
  gap: 24px;
  color: #5B4436;
  font-size: var(--text-ui-sm);
  font-weight: var(--weight-medium);
}

.desktop-links a,
.login-link {
  transition: color 120ms ease;
}

.desktop-links a:hover,
.login-link:hover {
  color: var(--accent);
}

.nav-right {
  gap: 18px;
}

.login-link {
  color: #5B4436;
  font-size: var(--text-ui-sm);
  font-weight: var(--weight-medium);
}

.nav-cta {
  padding: 11px var(--space-6);
  border-radius: 14px;
  background: var(--accent);
  color: var(--text-on-accent);
  font-size: var(--text-ui-sm);
  font-weight: var(--weight-semi);
  transition: filter 120ms ease;
}

.nav-cta:hover,
.reference-button:hover {
  filter: brightness(.96);
}

.mobile-nav {
  display: none;
}

/* Hero */
.reference-hero {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--column-gap);
  align-items: center;
  min-height: 560px;
  padding: var(--space-8) var(--page-gutter) 0;
}

.hero-copy h1 {
  max-width: var(--measure-display)*3;
  margin: 0 0 var(--space-6);
  color: var(--text-title);
  font-size: var(--text-display-xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-display-xl);
  line-height: var(--leading-display-xl);
  text-wrap: pretty;
  animation: taoUp .7s ease-out .08s both;
}

.hero-lead {
  max-width: var(--measure-lead);
  margin: 0 0 32px;
  color: var(--tao-body);
  font-size: var(--text-lead);
  line-height: var(--leading-lead);
  animation: taoUp .7s ease-out .16s both;
}

.source-stack {
  display: grid;
  max-width: 380px;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.source-row {
  position: relative;
  display: grid;
  grid-template-columns: 10px 1fr auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--row-pad);
  border-radius: var(--radius-md);
  animation: taoUp var(--dur-enter) ease-out both;
}

.source-row strong {
  font-size: var(--text-ui);
  font-weight: var(--weight-semi);
}

.source-row > span:last-child {
  font-size: var(--text-ui-sm);
}

.source-row:nth-child(1) { animation-delay: .5s; }
.source-row:nth-child(2) { animation-delay: .64s; }
.source-row:nth-child(3) { animation-delay: .78s; }

.source-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
}

.source-lilac {
  background: var(--tao-lilac-tint);
}

.source-lilac .source-dot,
.source-lilac .connector circle {
  background: var(--tao-lilac);
  fill: var(--tao-lilac);
}

.source-lilac strong { color: var(--tao-lilac-ink); }
.source-lilac > span:last-child { color: var(--tao-lilac-body); }
.source-lilac .connector path { stroke: var(--tao-lilac); }

.source-apricot {
  background: var(--tao-apricot-tint);
}

.source-apricot .source-dot,
.source-apricot .connector circle {
  background: var(--tao-orange);
  fill: var(--tao-orange);
}

.source-apricot strong { color: var(--tao-apricot-ink); }
.source-apricot > span:last-child { color: var(--tao-apricot-body); }
.source-apricot .connector path { stroke: var(--tao-orange); }

.source-mint {
  background: var(--tao-mint-tint);
}

.source-mint .source-dot,
.source-mint .connector circle {
  background: var(--tao-mint);
  fill: var(--tao-mint);
}

.source-mint strong { color: var(--tao-mint-ink); }
.source-mint > span:last-child { color: var(--tao-mint-body); }
.source-mint .connector path { stroke: var(--tao-mint); }

.connector {
  position: absolute;
  top: 50%;
  left: 100%;
  z-index: 0;
  width: 340px;
  height: 300px;
  margin-top: -150px;
  overflow: visible;
  pointer-events: none;
}

.connector path {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 5 7;
  opacity: .5;
  animation: taoFlow var(--dur-flow) linear infinite, taoFade 1s ease-out .9s both;
}

.source-apricot .connector path {
  animation-delay: .2s, 1s;
}

.source-mint .connector path {
  animation-delay: .4s, 1.1s;
}

.connector circle {
  animation: taoFade 1s ease-out 1.2s both;
}

.source-apricot .connector circle { animation-delay: 1.3s; }
.source-mint .connector circle { animation-delay: 1.4s; }

.insight-row {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: var(--space-5) 18px;
  border-radius: var(--radius-md);
  background: var(--tao-gradient-panel);
  animation: taoBubble .8s var(--ease-bubble) 1.05s both;
}

.insight-row .source-dot {
  flex: none;
  background: var(--tao-orange-bright);
  box-shadow: var(--ring-accent);
}

.insight-row strong {
  color: var(--text-on-invert);
  font-size: var(--text-body-sm);
  font-weight: var(--weight-insight);
  letter-spacing: -.01em;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  animation: taoUp .7s ease-out .26s both;
}

.reference-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 49px;
  padding: 15px 68px;
  border: 0;
  border-radius: var(--radius-md);
  font-size: 24px;
  font-weight: var(--weight-semi);
  line-height: 1.2;
  text-align: center;
  transition: filter 120ms ease;
}

.primary-button {
  background: var(--tao-gradient-cta);
  color: var(--text-on-accent);
}

.secondary-button {
  padding-inline: 26px;
  background: transparent;
  box-shadow: var(--hairline);
  color: var(--text-title);
}

.hero-visual {
  position: relative;
  height: 600px;
}

.blob-field {
  position: absolute;
  inset: 0;
  z-index: 0;
  filter: url(#taoGoo);
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  animation: taoMerge 1.4s cubic-bezier(.3, .9, .3, 1) both,
    taoOrbit var(--dur-orbit) var(--ease-orbit) 1.6s infinite;
}

.blob-orange {
  top: var(--space-8);
  left: var(--page-gutter);
  width: 300px;
  height: 300px;
  background: var(--tao-orange-blob);
  --mx: -130px;
  --my: -100px;
  animation-duration: 1.4s, 9s;
  animation-delay: .2s, 1.6s;
}

.blob-lilac {
  top: 20px;
  left: 248px;
  width: 282px;
  height: 282px;
  background: var(--tao-lilac-blob);
  --mx: 150px;
  --my: -80px;
  --ox: -12px;
  --oy: 14px;
  animation-duration: 1.4s, 11s;
  animation-delay: .34s, 1.7s;
}

.blob-mint {
  top: 296px;
  left: 14px;
  width: 292px;
  height: 292px;
  background: var(--tao-mint-blob);
  --mx: -130px;
  --my: 140px;
  --ox: 14px;
  --oy: 10px;
  animation-duration: 1.4s, 10s;
  animation-delay: .48s, 1.9s;
}

.blob-amber {
  top: 322px;
  left: 262px;
  width: 266px;
  height: 266px;
  background: var(--tao-amber-blob);
  --mx: 130px;
  --my: 130px;
  --ox: -10px;
  --oy: -14px;
  animation-delay: .62s, 2.1s;
}

.phone-deck {
  position: absolute;
  inset: 0;
  z-index: 2;
}

.phone {
  position: absolute;
  top: 52px;
  left: 50%;
  width: var(--phone-width);
  margin-left: -128px;
  animation: taoDeck var(--dur-deck) var(--ease-deck) infinite;
}

.phone-two { animation-delay: -4.5s; }
.phone-three { animation-delay: -9s; }

.phone-frame {
  padding: var(--phone-frame);
  border-radius: var(--radius-phone);
  background: var(--surface-card);
  box-shadow: var(--shadow-phone);
  animation: taoRise var(--dur-rise) var(--ease-out-soft) .55s both;
}

.phone-two .phone-frame { animation-delay: .7s; }
.phone-three .phone-frame { animation-delay: .85s; }

.phone-screen {
  position: relative;
  overflow: hidden;
  aspect-ratio: 9 / 17.6;
  border-radius: var(--radius-screen);
}

.screen-cream { background: #F7EFE7; }
.screen-stone { background: var(--tao-cream-deep); }

.phone-screen img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
}

/* Shared section composition */
.reference-section {
  position: relative;
  z-index: 2;
  padding-inline: var(--page-gutter);
}

.views-section {
  padding-top: 40px;
  padding-bottom: var(--section-gap);
}

.rootcause-section,
.capability-section,
.privacy-section,
.pricing-section,
.faq-section {
  padding-bottom: var(--section-gap);
}

.eyebrow,
.card-eyebrow,
.panel-eyebrow {
  font-weight: var(--weight-bold);
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 var(--space-4);
  color: var(--eyebrow);
  font-size: var(--text-eyebrow);
  letter-spacing: var(--tracking-eyebrow);
}

.reference-section > h2 {
  max-width: 22ch;
  margin: 0 0 var(--space-5);
  color: var(--text-title);
  font-size: var(--text-display-md);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-display-md);
  line-height: var(--leading-display-md);
}

.rootcause-section > h2 {
  max-width: 20ch;
}

.section-lead {
  max-width: var(--measure-body);
  margin: 0 0 36px;
  color: var(--tao-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
}

.views-grid,
.steps-grid,
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

.view-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: var(--card-pad);
  border-radius: var(--radius-2xl);
}

.view-orb {
  width: 34px;
  height: 34px;
  border-radius: 50%;
}

.card-eyebrow {
  font-size: var(--text-eyebrow-sm);
  letter-spacing: var(--tracking-eyebrow-sm);
  line-height: 1.35;
}

.view-card h3 {
  margin: 0;
  font-size: var(--text-heading-md);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-heading-md);
  line-height: normal;
}

.view-card p {
  margin: 0;
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
}

.card-note {
  margin-top: auto;
  padding-top: 10px;
  font-size: var(--text-meta);
}

.view-lilac { background: var(--tao-lilac-tint); color: var(--tao-lilac-body); }
.view-lilac .view-orb { background: var(--tao-lilac); }
.view-lilac .card-eyebrow { color: var(--tao-lilac-deep); }
.view-lilac h3 { color: var(--tao-lilac-ink); }
.view-lilac .card-note { color: var(--tao-lilac-body); opacity: .8; }

.view-apricot { background: var(--tao-apricot-tint); color: var(--tao-apricot-body); }
.view-apricot .view-orb { background: var(--tao-orange); }
.view-apricot .card-eyebrow { color: var(--tao-orange-deep); }
.view-apricot h3 { color: var(--tao-apricot-ink); }
.view-apricot .card-note { color: var(--tao-apricot-body); opacity: .8; }

.view-mint { background: var(--tao-mint-tint); color: var(--tao-mint-body); }
.view-mint .view-orb { background: var(--tao-mint); }
.view-mint .card-eyebrow { color: var(--tao-mint-deep); }
.view-mint h3 { color: var(--tao-mint-ink); }
.view-mint .card-note { color: var(--tao-mint-body); opacity: .8; }

.signals-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.signal-card {
  padding: 24px 22px;
  border-radius: var(--radius-xl);
  background: var(--surface-card);
}

.signal-card .card-eyebrow {
  margin-bottom: var(--space-3);
  font-size: var(--text-eyebrow-xs);
  letter-spacing: var(--tracking-eyebrow-xs);
}

.signal-labs .card-eyebrow { color: var(--tao-mint); }
.signal-wearable .card-eyebrow { color: var(--tao-lilac); }
.signal-life .card-eyebrow { color: var(--accent); }
.signal-mental .card-eyebrow { color: var(--tao-amber-deep); }

.signal-card h3 {
  margin: 0 0 var(--space-2);
  color: var(--text-title);
  font-size: 19px;
  font-weight: var(--weight-insight);
  letter-spacing: -.02em;
}

.signal-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--text-body-xs);
  line-height: var(--leading-body-xs);
}

.finding-panel,
.capability-panel,
.signup-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-3xl);
  background: var(--surface-invert);
}

.finding-panel {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: var(--space-9);
  align-items: center;
  margin-bottom: var(--space-5);
  padding: var(--panel-pad);
}

.finding-panel::after,
.capability-panel::after {
  position: absolute;
  top: -70px;
  right: -90px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: var(--tao-orange-blob);
  content: "";
  filter: blur(50px);
  opacity: .3;
  animation: taoOrbit var(--dur-orbit) var(--ease-orbit) infinite;
}

.finding-panel > *,
.capability-panel > * {
  position: relative;
  z-index: 1;
}

.panel-eyebrow {
  margin-bottom: 12px;
  color: #FFB27A;
  font-size: var(--text-eyebrow-sm);
  letter-spacing: var(--tracking-eyebrow);
}

.finding-copy h3,
.capability-panel h3 {
  margin: 0 0 var(--space-4);
  color: var(--text-on-invert);
  font-size: var(--text-heading-lg);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-heading-lg);
  line-height: normal;
}

.finding-copy p,
.capability-panel p {
  margin: 0;
  color: var(--text-on-invert-muted);
  font-size: 16px;
  line-height: var(--leading-lead);
}

.finding-copy p + p {
  margin-top: 12px;
}

.quote-stack {
  display: grid;
  gap: var(--space-3);
}

.quote-card {
  padding: 15px 20px;
  border-radius: var(--radius-md);
  background: var(--surface-invert-card);
}

.quote-card > div {
  margin-bottom: var(--space-1);
  color: rgba(255, 238, 225, .5);
  font-size: var(--text-eyebrow-xs);
  font-weight: var(--weight-bold);
  letter-spacing: .11em;
  text-transform: uppercase;
}

.quote-card p {
  color: rgba(255, 243, 232, .9);
  font-size: var(--text-ui-lg);
}

.quote-accent {
  background: var(--accent);
}

.quote-accent > div { color: rgba(255, 255, 255, .8); }
.quote-accent p { color: var(--tao-white); font-weight: var(--weight-semi); }

.step-card {
  padding: 28px 26px;
  border-radius: 22px;
  background: var(--surface-card);
}

.step-card .card-eyebrow {
  margin-bottom: 10px;
  color: var(--eyebrow);
}

.step-card h3,
.privacy-card h3,
.plan-card h3 {
  margin: 0 0 var(--space-3);
  color: var(--text-title);
  font-size: var(--text-heading-sm);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-heading-sm);
  line-height: normal;
}

.step-card p,
.privacy-card p,
.plan-card p {
  margin: 0;
  color: var(--tao-body);
  font-size: var(--text-ui);
  line-height: var(--leading-body-sm);
}

.step-accent {
  background: var(--tao-apricot-tint);
}

.step-accent .card-eyebrow { color: var(--tao-orange-deep); }
.step-accent h3 { color: var(--tao-apricot-ink); }
.step-accent p { color: var(--tao-apricot-body); }

.disclaimer {
  max-width: 90ch;
  margin: 16px 0 0;
  color: var(--text-muted);
  font-size: var(--text-fine);
  line-height: 1.5;
}

.capability-panel {
  padding: var(--panel-pad);
}

.capability-intro {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
}

.capability-intro img {
  width: 52px;
  height: 52px;
  border-radius: 17px;
}

.capability-intro p {
  max-width: var(--measure-lead);
  color: var(--text-on-invert);
  font-size: 24px;
  font-weight: var(--weight-bold);
  letter-spacing: -.026em;
  line-height: 1.28;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.capability-grid article {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--surface-invert-card);
}

.capability-grid h3 {
  margin-bottom: var(--space-3);
  font-size: var(--text-heading-md);
}

.capability-accent {
  background: var(--accent) !important;
}

.capability-accent .panel-eyebrow { color: rgba(255, 255, 255, .8); }
.capability-accent p { color: rgba(255, 255, 255, .9); }

.privacy-lead {
  max-width: 72ch;
}

.privacy-card {
  padding: 28px 26px;
  border-radius: 22px;
}

.privacy-card .card-eyebrow {
  margin-bottom: var(--space-3);
}

.privacy-mint { background: var(--tao-mint-tint); }
.privacy-mint .card-eyebrow { color: var(--tao-mint-deep); }
.privacy-mint h3 { color: var(--tao-mint-ink); }
.privacy-mint p { color: var(--tao-mint-body); }

.privacy-lilac { background: var(--tao-lilac-tint); }
.privacy-lilac .card-eyebrow { color: var(--tao-lilac-deep); }
.privacy-lilac h3 { color: var(--tao-lilac-ink); }
.privacy-lilac p { color: var(--tao-lilac-body); }

.privacy-apricot { background: var(--tao-apricot-tint); }
.privacy-apricot .card-eyebrow { color: var(--tao-orange-deep); }
.privacy-apricot h3 { color: var(--tao-apricot-ink); }
.privacy-apricot p { color: var(--tao-apricot-body); }

.plans-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  max-width: 800px;
  gap: var(--grid-gap);
}

.plan-card {
  display: flex;
  min-height: 310px;
  flex-direction: column;
  gap: 12px;
  padding: 32px 30px;
  border-radius: var(--radius-2xl);
  background: var(--surface-card);
}

.plan-card .card-eyebrow {
  color: var(--eyebrow);
}

.price {
  color: var(--text-title);
  font-size: 40px;
  font-weight: var(--weight-bold);
  letter-spacing: -.03em;
  line-height: 1.05;
}

.price span {
  font-size: 17px;
  font-weight: var(--weight-medium);
  letter-spacing: 0;
  opacity: .7;
}

.plan-card .reference-button {
  width: 100%;
  margin-top: auto;
}

.plan-dark {
  background: var(--tao-gradient-panel);
}

.plan-dark .card-eyebrow { color: #FFB27A; }
.plan-dark .price { color: var(--text-on-invert); }
.plan-dark p { color: var(--text-on-invert-muted); }

.faq-section {
  max-width: 916px;
  margin-inline: auto;
}

.faq-list {
  display: grid;
  gap: var(--space-2);
}

.faq-list details {
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--surface-card);
}

.faq-list summary {
  position: relative;
  padding: 18px 54px 18px 22px;
  list-style: none;
  color: var(--text-title);
  font-size: var(--text-lead);
  font-weight: var(--weight-semi);
  letter-spacing: -.018em;
  cursor: pointer;
}

.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  position: absolute;
  right: 22px;
  color: var(--accent);
  content: "+";
  font-size: 24px;
  line-height: 1;
}

.faq-list details[open] summary::after { content: "−"; }

.faq-list details p {
  margin: 0;
  padding: 0 22px 22px;
  color: var(--tao-body);
  font-size: var(--text-body-sm);
  line-height: var(--leading-lead);
}

.signup-section {
  padding: 0 var(--page-gutter) 64px;
}

.signup-panel {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
  padding: 56px 52px;
  border-radius: var(--radius-4xl);
  background: var(--tao-gradient-panel);
}

.signup-panel::after {
  position: absolute;
  right: -120px;
  bottom: -150px;
  width: 330px;
  height: 330px;
  border-radius: 50%;
  background: var(--tao-lilac);
  content: "";
  filter: blur(70px);
  opacity: .24;
}

.signup-copy,
.signup-card {
  position: relative;
  z-index: 1;
}

.signup-copy img {
  width: 52px;
  height: 52px;
  margin-bottom: var(--space-6);
  border-radius: 17px;
}

.signup-copy h2 {
  margin: 0 0 var(--space-5);
  color: var(--text-on-invert);
  font-size: var(--text-display-lg);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-display-lg);
  line-height: var(--leading-display-lg);
}

.signup-copy p {
  max-width: var(--measure-lead);
  margin: 0;
  color: var(--text-on-invert-muted);
  font-size: var(--text-body);
  line-height: var(--leading-body-xs);
}

.trust-line {
  margin-top: var(--space-4);
  color: rgba(255, 238, 225, .62);
  font-size: var(--text-fine);
  line-height: 1.5;
}

.signup-card {
  padding: 26px;
  border-radius: 22px;
  background: var(--surface-invert-card);
}

.signup-form {
  display: grid;
  gap: 12px;
}

.field-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.signup-form > label,
.field-pair label {
  display: grid;
  gap: var(--space-1);
  color: var(--text-on-invert-muted);
  font-size: var(--text-fine);
}

.signup-form input,
.signup-form select {
  width: 100%;
  min-width: 0;
  height: 46px;
  padding: 0 var(--space-4);
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--surface-card);
  color: var(--text-title);
  font-size: var(--text-ui-sm);
}

.signup-form input::placeholder { color: var(--text-placeholder); }

.signup-form fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.signup-form legend {
  margin-bottom: var(--space-2);
  color: var(--text-on-invert-muted);
  font-size: var(--text-fine);
}

.goal-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.goal-chips label {
  position: relative;
}

.goal-chips input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.goal-chips span {
  display: block;
  padding: 7px 12px;
  border: 1px solid rgba(255, 238, 225, .24);
  border-radius: var(--radius-pill);
  color: var(--text-on-invert);
  font-size: var(--text-eyebrow);
  cursor: pointer;
}

.goal-chips input:checked + span {
  border-color: var(--accent);
  background: var(--accent);
}

.goal-chips input:focus-visible + span {
  outline: 3px solid rgba(255, 178, 122, .5);
  outline-offset: 2px;
}

.form-status {
  min-height: 18px;
  margin: 0;
  color: #FFD2CF;
  font-size: var(--text-fine);
}

.submit-button {
  width: 100%;
}

.submit-button:disabled {
  cursor: wait;
  opacity: .65;
}

.form-success {
  display: none;
  align-content: center;
  min-height: 410px;
  gap: 12px;
  color: var(--text-on-invert-muted);
}

.form-success[aria-hidden="false"] { display: grid; }

.success-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--tao-orange-bright);
  box-shadow: var(--ring-accent);
}

.form-success h3 {
  margin: 0;
  color: var(--text-on-invert);
  font-size: var(--text-heading-lg);
  letter-spacing: var(--tracking-heading-lg);
}

.form-success p {
  margin: 0;
  font-size: var(--text-body-sm);
  line-height: var(--leading-lead);
}

.site-footer {
  padding: 0 var(--page-gutter) 38px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--space-4);
  color: var(--text-title);
  font-size: var(--text-heading-sm);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-heading-lg);
}

.footer-brand img {
  width: 42px;
  height: 42px;
  border-radius: 14px;
}

.footer-grid p {
  max-width: 34ch;
  margin: 0;
  color: var(--tao-body);
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
}

.footer-links {
  display: grid;
  align-content: start;
  gap: var(--space-3);
  color: var(--tao-body);
  font-size: var(--text-ui-sm);
}

.footer-links strong {
  margin-bottom: 3px;
  color: var(--text-title);
  font-size: var(--text-eyebrow-xs);
  letter-spacing: .13em;
  text-transform: uppercase;
}

.footer-links a:hover { color: var(--accent); }

.legal {
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid color-mix(in srgb, var(--text-title) 14%, transparent);
  color: var(--text-muted);
  font-size: var(--text-fine);
  line-height: 1.5;
}

/* Responsive composition: desktop token values remain unchanged. */
@media (max-width: 900px) {
  .page-surface {
    width: 100%;
    min-width: 0;
  }

  .reference-nav {
    padding: 20px 24px 0;
  }

  .desktop-links,
  .login-link {
    display: none;
  }

  .mobile-nav {
    display: block;
  }

  .mobile-nav summary {
    padding: 10px 0;
    list-style: none;
    color: #5B4436;
    font-size: var(--text-ui-sm);
    font-weight: var(--weight-medium);
    cursor: pointer;
  }

  .mobile-nav summary::-webkit-details-marker { display: none; }

  .mobile-nav-panel {
    position: fixed;
    top: 66px;
    right: 20px;
    display: grid;
    width: min(280px, calc(100vw - 40px));
    gap: 4px;
    padding: 12px;
    border-radius: var(--radius-lg);
    background: var(--surface-card);
    box-shadow: var(--shadow-lift);
  }

  .mobile-nav-panel a {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: #5B4436;
    font-size: var(--text-ui-sm);
  }

  .reference-hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    min-height: 0;
    padding: 52px 40px 0;
  }

  .hero-copy {
    max-width: 620px;
  }

  .source-stack {
    max-width: 520px;
  }

  .connector {
    display: none;
  }

  .hero-visual {
    height: 600px;
    max-width: 560px;
    width: 100%;
    margin-inline: auto;
  }

  .views-grid,
  .steps-grid,
  .privacy-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .signals-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .finding-panel,
  .signup-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .reference-section {
    padding-inline: 40px;
  }

  .signup-section,
  .site-footer {
    padding-inline: 40px;
  }

  .signup-panel {
    gap: 34px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .reference-nav {
    padding: 16px 16px 0;
  }

  .brand-mark,
  .brand-mark img {
    width: 34px;
    height: 34px;
  }

  .nav-right {
    gap: 12px;
  }

  .nav-cta {
    padding: 10px 14px;
    font-size: var(--text-meta);
  }

  .mobile-nav-panel {
    top: 62px;
    right: 14px;
    width: min(280px, calc(100vw - 28px));
  }

  .reference-hero {
    padding: 42px 20px 0;
  }

  .hero-copy h1 {
    max-width: 12ch;
    margin-bottom: 18px;
    font-size: clamp(43px, 13vw, 56px);
    line-height: 1;
  }

  .hero-lead {
    margin-bottom: 28px;
    font-size: 17px;
    line-height: 1.55;
  }

  .source-stack {
    max-width: none;
    margin-bottom: 28px;
  }

  .source-row {
    grid-template-columns: 10px minmax(0, 1fr) auto;
    gap: 10px;
    padding: 12px 14px;
  }

  .source-row strong { font-size: var(--text-ui-sm); }
  .source-row > span:last-child { font-size: var(--text-meta); }

  .insight-row {
    padding: 14px;
  }

  .insight-row strong {
    font-size: var(--text-ui-sm);
  }

  .hero-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .hero-actions .reference-button {
    width: 100%;
  }

  .hero-visual {
    height: 510px;
    margin-top: 4px;
  }

  .blob-orange {
    top: 42px;
    left: 4%;
    width: 220px;
    height: 220px;
  }

  .blob-lilac {
    top: 30px;
    left: auto;
    right: 0;
    width: 210px;
    height: 210px;
  }

  .blob-mint {
    top: 246px;
    left: 0;
    width: 220px;
    height: 220px;
  }

  .blob-amber {
    top: 264px;
    left: auto;
    right: 2%;
    width: 204px;
    height: 204px;
  }

  .phone {
    top: 46px;
    width: 212px;
    margin-left: -106px;
    animation-name: taoDeckMobile;
  }

  .phone-frame {
    padding: 7px;
    border-radius: 36px;
  }

  .phone-screen {
    border-radius: 29px;
  }

  @keyframes taoDeckMobile {
    0%, 26% { transform: translate(0, 0) scale(1) rotate(0deg); opacity: 1; z-index: 4; }
    33.33%, 59.33% { transform: translate(72px, 20px) scale(.84) rotate(4deg); opacity: .96; z-index: 3; }
    63.5% { transform: translate(0, 52px) scale(.58) rotate(0deg); opacity: .8; z-index: 1; }
    66.66%, 92.66% { transform: translate(-72px, 20px) scale(.84) rotate(-4deg); opacity: .96; z-index: 1; }
    100% { transform: translate(0, 0) scale(1) rotate(0deg); opacity: 1; z-index: 4; }
  }

  .reference-section {
    padding-inline: 20px;
  }

  .views-section {
    padding-top: 40px;
    padding-bottom: 64px;
  }

  .rootcause-section,
  .capability-section,
  .privacy-section,
  .pricing-section,
  .faq-section {
    padding-bottom: 64px;
  }

  .reference-section > h2 {
    font-size: clamp(34px, 10.5vw, 42px);
    line-height: 1.04;
  }

  .section-lead {
    margin-bottom: 30px;
    font-size: 16.5px;
  }

  .view-card {
    padding: 28px 24px;
  }

  .signals-grid,
  .capability-grid,
  .plans-grid,
  .field-pair,
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .finding-panel,
  .capability-panel {
    gap: 28px;
    padding: 32px 24px;
  }

  .capability-intro {
    grid-template-columns: minmax(0, 1fr);
  }

  .capability-intro p {
    font-size: var(--text-heading-sm);
  }

  .plan-card {
    min-height: 280px;
  }

  .faq-list summary {
    padding-left: 18px;
    font-size: 16px;
  }

  .faq-list details p {
    padding-inline: 18px;
    font-size: var(--text-ui-sm);
  }

  .signup-section {
    padding: 0 14px 56px;
  }

  .signup-panel {
    gap: 30px;
    border-radius: var(--radius-3xl);
  }

  .signup-copy h2 {
    font-size: 42px;
  }

  .signup-card {
    margin-top: 10px;
    padding: 20px;
  }

  .site-footer {
    padding: 0 20px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-delay: 0s !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }

  .connector circle {
    display: none;
  }
}