:root {
  --purple: #aa198d;
  --pink: #ea1d76;
  --cyan: #00b3e3;
  --ink: #262329;
  --ink-soft: #575159;
  --paper: #f7f5f2;
  --white: #fff;
  --stone: #d8d2cd;
  --stone-light: #ebe7e3;
  --purple-dark: #58114d;
  --max: 1440px;
  --gutter: clamp(1.25rem, 4.2vw, 5.5rem);
  --serif: "Newsreader", Georgia, serif;
  --sans: "Manrope", Arial, sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body.menu-open { overflow: hidden; }

img { display: block; max-width: 100%; }

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

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

button { color: inherit; }

h1,
h2,
h3,
p { margin-top: 0; }

h1,
h2 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

h1 {
  max-width: 15ch;
  margin-bottom: 1.7rem;
  font-size: clamp(3.55rem, 6vw, 6.55rem);
}

h2 {
  font-size: clamp(3rem, 5.4vw, 6rem);
}

h3 {
  margin-bottom: 0.6rem;
  font-size: clamp(1.25rem, 1.8vw, 1.7rem);
  line-height: 1.2;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.75rem 1rem;
  transform: translateY(-160%);
  background: var(--white);
  border: 2px solid var(--purple);
}

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

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
  min-height: 5.5rem;
  padding: 1rem var(--gutter);
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px);
  transition: min-height 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.site-header.scrolled {
  min-height: 4.7rem;
  border-color: var(--stone-light);
  box-shadow: 0 8px 30px rgba(38, 35, 41, 0.05);
}

.brand { width: clamp(11.5rem, 15vw, 15.3rem); }

.site-nav {
  display: flex;
  gap: clamp(1rem, 2vw, 2.4rem);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.035em;
}

.site-nav a,
.footer-links a { transition: color 180ms ease; }

.site-nav a:hover,
.site-nav a:focus-visible,
.footer-links a:hover,
.footer-links a:focus-visible { color: var(--purple); }

.header-cta {
  justify-self: end;
  padding-bottom: 0.25rem;
  border-bottom: 2px solid var(--pink);
  font-size: 0.8rem;
  font-weight: 700;
}

.menu-toggle { display: none; }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(24rem, 0.98fr);
  min-height: 100svh;
  padding: 9.5rem var(--gutter) 6rem;
  overflow: hidden;
}

.hero::before {
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 0.35rem;
  content: "";
  background: linear-gradient(90deg, var(--purple), var(--pink) 52%, var(--cyan));
}

.hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 49rem;
  padding: 3rem 4.5rem 5.8rem 0;
}

.eyebrow,
.section-kicker {
  margin-bottom: 2rem;
  color: var(--purple);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.eyebrow span {
  width: 2.8rem;
  height: 2px;
  background: var(--cyan);
}

.hero-lede {
  max-width: 42rem;
  margin-bottom: 1rem;
  font-size: clamp(1.22rem, 1.55vw, 1.55rem);
  line-height: 1.5;
}

.hero-support {
  max-width: 39rem;
  margin-bottom: 2.3rem;
  color: var(--ink-soft);
}

.hero-support strong { color: var(--ink); }

.button-row {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  min-height: 3.7rem;
  padding: 0.9rem 1.35rem;
  border: 1px solid transparent;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, color 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover,
.button:focus-visible { transform: translateY(-2px); }

.button-primary {
  color: var(--white);
  background: var(--purple);
}

.button-primary:hover,
.button-primary:focus-visible { background: var(--purple-dark); }

.hero-visual {
  position: relative;
  min-height: 41rem;
}

.hero-image {
  position: absolute;
  inset: 0 calc(var(--gutter) * -1) 0 0;
  margin: 0;
  overflow: hidden;
  border-radius: 13rem 0 0 0;
}

.hero-image::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(180deg, transparent 48%, rgba(27, 22, 29, 0.46));
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-orbit {
  position: absolute;
  z-index: 3;
  top: 4.5rem;
  left: -4rem;
  display: grid;
  place-items: center;
  width: 9rem;
  height: 9rem;
  color: var(--white);
  background: var(--purple);
  border: 0.45rem solid var(--paper);
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-orbit span:nth-child(1) { transform: translateY(0.8rem); }
.hero-orbit span:nth-child(3) { transform: translateY(-0.8rem); }

.section-pad { padding: clamp(6rem, 10vw, 10rem) var(--gutter); }

.problem { background: var(--white); }

.problem-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.75fr);
  gap: clamp(3rem, 8vw, 10rem);
  max-width: var(--max);
  margin: 0 auto;
}

.problem-grid h2 { max-width: 12ch; }

.problem-copy { padding-top: 0.8rem; }

.problem-copy .lead {
  font-size: clamp(1.25rem, 1.8vw, 1.6rem);
  line-height: 1.5;
}

.problem-copy p:not(.lead) { color: var(--ink-soft); }

.clean-air-stat {
  display: flex;
  align-items: flex-end;
  gap: 1.2rem;
  max-width: 26rem;
  padding-top: 2.2rem;
  margin-top: 3rem;
  border-top: 1px solid var(--stone);
}

.clean-air-stat strong {
  color: var(--purple);
  font-family: var(--serif);
  font-size: clamp(4.4rem, 7vw, 7.2rem);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 0.75;
}

.clean-air-stat span {
  max-width: 11rem;
  color: var(--ink-soft);
  font-size: 0.78rem;
  line-height: 1.45;
}

.problem-copy .source-note {
  margin-top: 1.7rem;
  color: #777078;
  font-size: 0.75rem;
  line-height: 1.55;
}

.source-note a {
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--purple) 50%, transparent);
  text-underline-offset: 0.18em;
}

.condition-index {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: var(--max);
  margin: clamp(4rem, 8vw, 7rem) auto 0;
  border-top: 1px solid var(--stone);
  border-bottom: 1px solid var(--stone);
}

.condition-index div {
  min-height: 9rem;
  padding: 1.1rem;
  border-right: 1px solid var(--stone);
}

.condition-index div:last-child { border-right: 0; }

.condition-index span {
  display: block;
  margin-bottom: 2.6rem;
  color: var(--pink);
  font-size: 0.75rem;
  font-weight: 700;
}

.condition-index strong {
  display: block;
  font-size: clamp(0.88rem, 1.2vw, 1.05rem);
  font-weight: 600;
}

.outcome-index div {
  min-height: 13rem;
}

.outcome-index p {
  max-width: 16rem;
  margin: 0.8rem 0 0;
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.55;
}

.benefit-index { grid-template-columns: repeat(3, 1fr); }

.benefit-index p { max-width: 22rem; }

.services { background: var(--paper); }

.services-intro {
  display: grid;
  grid-template-columns: 1.1fr 0.65fr;
  gap: 5rem;
  align-items: end;
  max-width: var(--max);
  margin: 0 auto clamp(4rem, 7vw, 7rem);
}

.services-intro h2 { max-width: 11ch; margin-bottom: 0; }

.services-intro > p {
  max-width: 32rem;
  margin-bottom: 0.5rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.services-layout {
  display: grid;
  grid-template-columns: minmax(20rem, 0.75fr) minmax(30rem, 1.25fr);
  gap: clamp(3rem, 7vw, 8rem);
  max-width: var(--max);
  margin: 0 auto;
}

.services-image {
  position: sticky;
  top: 7rem;
  align-self: start;
  height: min(67vh, 48rem);
  margin: 0;
}

.services-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78) contrast(0.96);
}

.service-item {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.5rem;
  padding: 0 0 3.3rem;
  margin-bottom: 3.3rem;
  border-bottom: 1px solid var(--stone);
}

.service-item:last-child { margin-bottom: 0; }

.service-number {
  color: var(--pink);
  font-family: var(--serif);
  font-size: 1.4rem;
}

.service-item p {
  max-width: 43rem;
  margin-bottom: 0;
  color: var(--ink-soft);
}

.service-item .service-label {
  margin-bottom: 0.65rem;
  color: var(--purple);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.solutions-spectrum {
  display: grid;
  grid-template-columns: minmax(10rem, 0.3fr) minmax(0, 1.7fr);
  gap: clamp(2rem, 5vw, 6rem);
  max-width: var(--max);
  padding: 2.2rem 0;
  margin: clamp(5rem, 8vw, 8rem) auto 0;
  border-top: 1px solid var(--stone);
  border-bottom: 1px solid var(--stone);
}

.solutions-spectrum > p {
  margin: 0;
  color: var(--purple);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.solutions-spectrum > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 0;
}

.solutions-spectrum span {
  display: inline-flex;
  align-items: center;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.solutions-spectrum span:not(:last-child)::after {
  width: 0.27rem;
  height: 0.27rem;
  margin: 0 1rem;
  content: "";
  background: var(--pink);
  border-radius: 50%;
}

.concise-services .services-image {
  height: min(61vh, 41rem);
}

.concise-services .service-item {
  padding-bottom: 2.7rem;
  margin-bottom: 2.7rem;
}

.approach {
  position: relative;
  padding: clamp(6rem, 9vw, 9rem) var(--gutter) clamp(6.5rem, 10vw, 10rem);
  overflow: hidden;
  color: var(--white);
  background: #211c24;
}

.approach::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 0.35rem;
  content: "";
  background: linear-gradient(90deg, var(--purple), var(--pink), var(--cyan));
}

.approach::after {
  position: absolute;
  right: -14rem;
  bottom: -22rem;
  width: 40rem;
  height: 40rem;
  content: "";
  border: 1px solid rgba(0, 179, 227, 0.38);
  border-radius: 50%;
  box-shadow: 0 0 0 8rem rgba(170, 25, 141, 0.05), 0 0 0 16rem rgba(234, 29, 118, 0.035);
}

.section-kicker.light { color: #7ddaf2; }

.approach-heading {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 5rem;
  align-items: end;
  max-width: var(--max);
  margin: 0 auto clamp(5rem, 9vw, 9rem);
}

.approach-heading .section-kicker { grid-column: 1 / -1; margin-bottom: -2rem; }

.approach-heading h2 { max-width: 10ch; margin-bottom: 0; }

.approach-heading > p:last-child {
  max-width: 34rem;
  margin-bottom: 0.5rem;
  color: #c9c1ca;
  font-size: 1.08rem;
}

.process-list {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: var(--max);
  padding: 0;
  margin: 0 auto;
  list-style: none;
}

.process-list::before {
  position: absolute;
  top: 4.1rem;
  right: 12%;
  left: 12%;
  height: 1px;
  content: "";
  background: rgba(255, 255, 255, 0.22);
}

.process-step {
  position: relative;
  padding-right: clamp(1.5rem, 3vw, 3.5rem);
}

.step-number {
  display: block;
  margin-bottom: 2rem;
  color: #a69da8;
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.step-mark {
  position: relative;
  z-index: 2;
  width: 1.25rem;
  height: 1.25rem;
  margin-bottom: 2.3rem;
  background: var(--purple);
  border: 4px solid #211c24;
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.55);
}

.process-step:nth-child(2) .step-mark { background: var(--pink); }
.process-step:nth-child(3) .step-mark { background: #7c4bb2; }
.process-step:nth-child(4) .step-mark { background: var(--cyan); }

.process-step h3 {
  font-family: var(--serif);
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 400;
}

.process-step p { max-width: 17rem; margin: 0; color: #bdb5bf; }

.audiences { background: var(--white); }

.audiences-heading {
  display: grid;
  grid-template-columns: 0.5fr 1fr;
  gap: 4rem;
  max-width: var(--max);
  margin: 0 auto clamp(4.5rem, 8vw, 8rem);
}

.audiences-heading h2 { max-width: 11ch; margin: 0; }

.audiences-composition {
  display: grid;
  grid-template-columns: minmax(22rem, 0.92fr) minmax(28rem, 1.08fr);
  gap: clamp(3rem, 7vw, 8rem);
  max-width: var(--max);
  margin: 0 auto;
}

.audiences-image { margin: 0; }

.audiences-image img {
  width: 100%;
  height: clamp(34rem, 58vw, 49rem);
  object-fit: cover;
  filter: saturate(0.76) contrast(0.96);
}

.audience-list { align-self: center; }

.audience-list article {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--stone);
}

.audience-list article:last-child { border-bottom: 1px solid var(--stone); }

.audience-list span {
  color: var(--cyan);
  font-size: 0.67rem;
  font-weight: 700;
}

.audience-list h3 { margin-bottom: 0.35rem; font-size: 1.12rem; }
.audience-list p { margin: 0; color: var(--ink-soft); font-size: 0.93rem; }

.concise-audiences { align-items: stretch; }

.concise-audiences .audiences-image img {
  height: 100%;
  min-height: 38rem;
}

.audience-groups {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.audience-groups article {
  padding: clamp(2rem, 4vw, 3.5rem) 0;
  border-top: 1px solid var(--stone);
}

.audience-groups article:last-child { border-bottom: 1px solid var(--stone); }

.audience-label {
  margin-bottom: 1rem;
  color: var(--purple);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.audience-groups h3 {
  margin-bottom: 1rem;
  font-family: var(--serif);
  font-size: clamp(2rem, 3vw, 3.2rem);
  font-weight: 400;
  letter-spacing: -0.035em;
}

.audience-groups article > p:not(.audience-label) {
  max-width: 43rem;
  margin-bottom: 0;
  color: var(--ink-soft);
}

.audience-groups .sector-list {
  padding-top: 1.5rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--stone-light);
  color: var(--ink) !important;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.75;
}

.trust-line {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: var(--max);
  margin: clamp(4.5rem, 7vw, 7rem) auto 0;
  border-top: 1px solid var(--stone);
  border-bottom: 1px solid var(--stone);
}

.trust-line span {
  position: relative;
  padding: 1.5rem 1rem;
  border-right: 1px solid var(--stone);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
}

.trust-line span:last-child { border-right: 0; }

.trust-line span::before {
  position: absolute;
  top: -2px;
  left: 50%;
  width: 2.4rem;
  height: 3px;
  content: "";
  transform: translateX(-50%);
  background: var(--purple);
}

.trust-line span:nth-child(2)::before { background: var(--pink); }
.trust-line span:nth-child(3)::before { background: #7450a7; }
.trust-line span:nth-child(4)::before { background: var(--cyan); }

.credibility { background: var(--white); }

.credibility-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.55fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: end;
  max-width: var(--max);
  margin: 0 auto;
}

.credibility-heading h2 {
  max-width: 12ch;
  margin-bottom: 0;
}

.credibility-heading > p {
  max-width: 29rem;
  padding: 1.7rem 0 0 1.5rem;
  margin: 0 0 0.6rem;
  border-top: 1px solid var(--stone);
  border-left: 3px solid var(--cyan);
  color: var(--ink-soft);
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
}

.credibility .trust-line { margin-top: clamp(3.5rem, 6vw, 5.5rem); }

.why {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(25rem, 0.95fr);
  gap: clamp(4rem, 9vw, 10rem);
  padding: clamp(6rem, 10vw, 10rem) var(--gutter);
  background: var(--paper);
}

.why-lead { max-width: 43rem; }
.why-lead h2 { max-width: 11ch; }
.why-lead > p:last-child { max-width: 36rem; color: var(--ink-soft); font-size: 1.1rem; }

.why-principles article {
  position: relative;
  display: grid;
  grid-template-columns: minmax(9rem, 0.5fr) 1fr;
  gap: 2rem;
  padding: 1.6rem 0;
  border-top: 1px solid var(--stone);
}

.why-principles article:last-child { border-bottom: 1px solid var(--stone); }

.why-principles article::before {
  position: absolute;
  top: -1px;
  left: 0;
  width: 3rem;
  height: 2px;
  content: "";
  background: var(--purple);
}

.why-principles article:nth-child(2)::before { background: var(--pink); }
.why-principles article:nth-child(3)::before { background: #7450a7; }
.why-principles article:nth-child(4)::before { background: var(--cyan); }

.why-principles span { font-weight: 700; }
.why-principles p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

.contact {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(32rem, 1.1fr);
  gap: clamp(4rem, 9vw, 10rem);
  padding: clamp(6rem, 10vw, 10rem) var(--gutter);
  overflow: hidden;
  color: var(--white);
  background: var(--purple-dark);
}

.contact::before {
  position: absolute;
  right: -5rem;
  bottom: -8rem;
  width: 28rem;
  height: 28rem;
  content: "";
  border: 1px solid rgba(0, 179, 227, 0.35);
  border-radius: 50%;
}

.contact::after {
  position: absolute;
  right: 8rem;
  bottom: -15rem;
  width: 24rem;
  height: 24rem;
  content: "";
  border: 1px solid rgba(234, 29, 118, 0.45);
  border-radius: 50%;
}

.contact-copy,
.assessment-form { position: relative; z-index: 2; }

.contact-copy { align-self: center; }

.contact-copy h2 { max-width: 11ch; }

.contact-copy > p:not(.section-kicker) {
  max-width: 36rem;
  color: #d9cdd8;
  font-size: 1.08rem;
}

.assessment-form {
  padding: clamp(1.8rem, 3.5vw, 3.5rem);
  color: var(--ink);
  background: var(--white);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.assessment-form label {
  display: block;
  margin-bottom: 1.35rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.assessment-form label > span { color: #837b84; font-weight: 500; }

.honeypot {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.assessment-form input,
.assessment-form select,
.assessment-form textarea {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.8rem 0;
  border: 0;
  border-bottom: 1px solid var(--stone);
  border-radius: 0;
  outline: none;
  color: var(--ink);
  background: transparent;
  font-size: 1rem;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.assessment-form textarea { resize: vertical; }

.assessment-form input:focus,
.assessment-form select:focus,
.assessment-form textarea:focus {
  border-color: var(--purple);
  box-shadow: 0 1px 0 var(--purple);
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.button-light {
  color: var(--white);
  background: var(--purple);
}

.button-light:hover,
.button-light:focus-visible { background: var(--purple-dark); }

.form-actions p,
.form-status {
  max-width: 16rem;
  margin: 0;
  color: #756d76;
  font-size: 0.75rem;
  line-height: 1.45;
}

.form-status { max-width: none; margin-top: 1rem; color: var(--purple); font-weight: 700; }
.form-status.success { color: #2d6a52; }
.form-status.error { color: #a13f58; }

.assessment-form button:disabled { cursor: wait; opacity: 0.72; }

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  padding: 4.5rem var(--gutter) 2rem;
  background: var(--white);
}

.footer-brand img { width: 15rem; }
.footer-brand p { margin: 1.25rem 0 0; color: var(--ink-soft); font-size: 0.8rem; line-height: 1.6; }

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem 3rem;
  align-self: start;
  font-size: 0.76rem;
  font-weight: 600;
}

.footer-legal {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--stone-light);
  color: #7a747b;
  font-size: 0.75rem;
}

.footer-legal p { margin: 0; }
.footer-legal a { margin-left: 0; }
.footer-legal a:first-of-type { margin-left: auto; }

.mobile-cta { display: none; }

.reveal {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-delay { transition-delay: 120ms; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1120px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-nav {
    position: fixed;
    inset: 5.5rem 0 auto;
    display: grid;
    gap: 0;
    padding: 1.5rem var(--gutter) 2rem;
    transform: translateY(-130%);
    opacity: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--stone);
    transition: transform 250ms ease, opacity 200ms ease;
  }
  .site-nav.open { transform: none; opacity: 1; }
  .site-nav a { padding: 1rem 0; border-bottom: 1px solid var(--stone-light); font-size: 1rem; }
  .header-cta { display: none; }
  .menu-toggle {
    display: grid;
    gap: 0.38rem;
    width: 2.8rem;
    height: 2.8rem;
    padding: 0.8rem 0.6rem;
    border: 0;
    background: transparent;
    cursor: pointer;
  }
  .menu-toggle span:not(.sr-only) { display: block; width: 100%; height: 1px; background: var(--ink); transition: transform 180ms ease; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(0.22rem) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-0.22rem) rotate(-45deg); }
  .hero { grid-template-columns: 1fr 0.85fr; }
  .hero-copy { padding-right: 3rem; }
  .hero-orbit { left: -3rem; }

  body { padding-bottom: calc(4.5rem + env(safe-area-inset-bottom)); }
  body.menu-open .mobile-cta { display: none; }

  .mobile-cta {
    position: fixed;
    z-index: 70;
    right: 0;
    bottom: 0;
    left: 0;
    display: flex;
    justify-content: flex-end;
    padding: 0.55rem var(--gutter) calc(0.55rem + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--white) 94%, transparent);
    border-top: 1px solid var(--stone-light);
    box-shadow: 0 -10px 30px rgba(38, 35, 41, 0.09);
    backdrop-filter: blur(14px);
  }

  .mobile-cta a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: min(100%, 28rem);
    min-height: 3.15rem;
    padding: 0.65rem 0.75rem;
    font-size: 0.72rem;
    font-weight: 700;
    text-align: center;
  }

  .mobile-cta-primary {
    color: var(--white);
    background: var(--purple);
    border: 1px solid var(--purple);
  }
}

@media (max-width: 860px) {
  .hero {
    display: flex;
    flex-direction: column;
    min-height: auto;
    padding-top: 8.5rem;
  }
  .hero-copy { padding: 1rem 0 3.5rem; }
  h1 { font-size: clamp(3.6rem, 12.8vw, 6rem); }
  .hero-visual { min-height: 37rem; margin-right: calc(var(--gutter) * -1); }
  .hero-image { inset: 0; border-radius: 8rem 0 0 0; }
  .hero-orbit { top: -2.2rem; left: auto; right: 1rem; width: 7rem; height: 7rem; }
  .problem-grid,
  .services-intro,
  .approach-heading,
  .audiences-heading,
  .credibility-heading,
  .why,
  .contact { grid-template-columns: 1fr; }
  .condition-index { grid-template-columns: repeat(2, 1fr); }
  .condition-index div:nth-child(2n) { border-right: 0; }
  .condition-index div:nth-child(n + 3) { border-top: 1px solid var(--stone); }
  .condition-index div:last-child { grid-column: auto; }
  .benefit-index { grid-template-columns: 1fr; }
  .benefit-index div,
  .benefit-index div:nth-child(2n),
  .benefit-index div:nth-child(n + 3) {
    border-top: 0;
    border-right: 0;
    border-bottom: 1px solid var(--stone);
  }
  .benefit-index div:last-child { border-bottom: 0; }
  .services-layout,
  .audiences-composition { grid-template-columns: 1fr; }
  .services-image { position: relative; top: auto; height: 34rem; }
  .concise-services .services-image { height: 34rem; }
  .solutions-spectrum { grid-template-columns: 1fr; gap: 1.25rem; }
  .approach-heading .section-kicker { margin-bottom: -3rem; }
  .process-list { grid-template-columns: 1fr 1fr; gap: 4rem 2rem; }
  .process-list::before { display: none; }
  .audiences-heading { gap: 1rem; }
  .audiences-image img { height: 38rem; }
  .concise-audiences .audiences-image img { height: 34rem; min-height: 0; }
  .trust-line { grid-template-columns: repeat(2, 1fr); }
  .trust-line span:nth-child(2n) { border-right: 0; }
  .trust-line span:nth-child(n + 3) { border-top: 1px solid var(--stone); }
  .credibility-heading { align-items: start; }
  .credibility-heading > p { max-width: 36rem; }
  .contact { gap: 4rem; }

}

@media (max-width: 560px) {
  .site-header { min-height: 4.7rem; padding-block: 0.8rem; }
  .brand { width: 11.6rem; }
  .site-nav { inset-block-start: 4.7rem; }
  .hero { padding-top: 7.4rem; padding-bottom: 4rem; }
  h1 { font-size: clamp(3.3rem, 16vw, 5rem); }
  h2 { font-size: clamp(2.8rem, 13vw, 4.2rem); }
  .hero-lede { font-size: 1.14rem; }
  .button-row { align-items: flex-start; flex-direction: column; gap: 1.1rem; }
  .button { width: 100%; }
  .hero-visual { min-height: 31rem; }
  .hero-orbit { width: 6rem; height: 6rem; border-width: 0.3rem; }
  .hero-orbit span { font-size: 0.48rem; }
  .section-pad { padding-block: 5.5rem; }
  .condition-index { grid-template-columns: 1fr; }
  .condition-index div,
  .condition-index div:nth-child(2n) { min-height: 8rem; border-right: 0; border-bottom: 1px solid var(--stone); }
  .condition-index div:last-child { grid-column: auto; border-top: 0; border-bottom: 0; }
  .condition-index span { margin-bottom: 1.2rem; }
  .clean-air-stat { align-items: center; }
  .clean-air-stat strong { font-size: 4.7rem; }
  .solutions-spectrum span:not(:last-child)::after { margin-inline: 0.7rem; }
  .services-intro { gap: 1.5rem; }
  .services-image { height: 27rem; }
  .concise-services .services-image { height: 27rem; }
  .service-item { grid-template-columns: 2.2rem 1fr; gap: 0.8rem; padding-bottom: 2.4rem; margin-bottom: 2.4rem; }
  .approach { padding-block: 5.5rem; }
  .approach-heading { gap: 1.5rem; margin-bottom: 4rem; }
  .approach-heading .section-kicker { margin-bottom: -0.5rem; }
  .process-list { grid-template-columns: 1fr; gap: 3.3rem; }
  .process-step { padding-left: 2.2rem; }
  .process-step::before { position: absolute; top: 0.3rem; bottom: -3.3rem; left: 0.3rem; width: 1px; content: ""; background: rgba(255,255,255,0.2); }
  .process-step:last-child::before { bottom: 0; }
  .step-number { margin-bottom: 0.7rem; }
  .step-mark { position: absolute; top: 0.15rem; left: -0.25rem; margin: 0; }
  .process-step h3 { margin-bottom: 0.4rem; }
  .audiences-composition { gap: 3rem; }
  .audiences-image img { height: 31rem; }
  .concise-audiences .audiences-image img { height: 29rem; }
  .audience-list article { grid-template-columns: 2.2rem 1fr; gap: 0.75rem; }
  .why { padding-block: 5.5rem; }
  .why-principles article { grid-template-columns: 1fr; gap: 0.4rem; }
  .credibility-heading { gap: 1.5rem; }
  .credibility-heading > p { padding-top: 1.25rem; }
  .contact { grid-template-columns: minmax(0, 1fr); padding-block: 5.5rem; }
  .assessment-form { padding: 1.4rem; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form-actions { align-items: flex-start; flex-direction: column; }
  .site-footer { grid-template-columns: 1fr; gap: 3rem; padding-top: 3.5rem; }
  .footer-links { grid-template-columns: 1fr; }
  .footer-legal { grid-column: auto; align-items: flex-start; flex-direction: column; gap: 0.6rem; }
  .footer-legal a,
  .footer-legal a:first-of-type { margin-left: 0; margin-top: 0.6rem; }
  .mobile-cta { padding-inline: 0.65rem; }
  .mobile-cta a { width: 100%; font-size: 0.67rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}