@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap");

:root {
  --color-background: #f6f8f7;
  --color-panel: #eef3f1;
  --color-panel-strong: #d9e5e1;
  --color-brand: #2a4041;
  --color-ink: #242827;
  --color-muted: #556260;
  --color-line: rgba(42, 64, 65, 0.14);
  --color-accent: #00735c;
  --color-accent-strong: #045681;
  --color-accent-warm: #ec6e3e;
  --color-accent-soft: #adfca2;
  --shadow-card: 0 18px 40px rgba(16, 31, 55, 0.06);
  --shadow-panel: 0 24px 60px rgba(16, 31, 55, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #f7f9fb;
  color: var(--color-ink);
  font-family: "IBM Plex Sans", sans-serif;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

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

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

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

::selection {
  background: rgba(0, 115, 92, 0.18);
}

.shell {
  width: min(1280px, calc(100% - 2rem));
  margin: 0 auto;
}

.section {
  padding: 5rem 0;
}

.section-tight {
  padding: 4rem 0;
}

.section-muted {
  background: #eef2f4;
}

.section-dark {
  background: linear-gradient(135deg, rgba(18, 52, 72, 1), rgba(14, 94, 95, 0.96));
  color: #fff;
}

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-accent-strong);
}

.eyebrow-light {
  color: var(--color-accent-soft);
}

.page-title,
.section-title,
.hero-title {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5.2rem);
}

.page-title {
  font-size: clamp(2.8rem, 7vw, 4.6rem);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
}

.lead,
.section-copy {
  max-width: 48rem;
  color: var(--color-muted);
  font-size: 1.08rem;
}

.lead-light {
  color: rgba(255, 255, 255, 0.84);
}

.stack {
  display: grid;
  gap: 1.25rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  border: 1px solid var(--color-line);
  border-radius: 1.5rem;
  background: #fff;
  box-shadow: var(--shadow-card);
  padding: 1.75rem;
}

.home-feature-card {
  transition: box-shadow 160ms ease, transform 160ms ease;
}

.home-feature-card:hover {
  box-shadow: 0 24px 48px rgba(16, 31, 55, 0.1);
  transform: translateY(-2px);
}

.card-topline {
  border-top-width: 4px;
}

.card-brand {
  border-top-color: var(--color-brand);
}

.card-warm {
  border-top-color: var(--color-accent-warm);
}

.card-blue {
  border-top-color: var(--color-accent-strong);
}

.application-card {
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.application-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.application-icon {
  width: 3rem;
  height: 3rem;
  object-fit: contain;
}

.application-link-bridge {
  display: grid;
  justify-items: center;
  gap: 0.5rem;
  margin: -0.25rem 0;
}

.application-link-bridge-line {
  width: 2px;
  height: 1.5rem;
  background: linear-gradient(180deg, rgba(4, 86, 129, 0.12), rgba(4, 86, 129, 0.7));
}

.application-link-bridge-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgba(4, 86, 129, 0.16);
  border-radius: 999px;
  background: linear-gradient(180deg, #eef3f7, #ffffff);
  color: var(--color-accent-strong);
  box-shadow: var(--shadow-card);
  font-size: 1.2rem;
  font-weight: 700;
}

.team-card {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  height: 100%;
}

.team-headshot {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 1.15rem;
}

.team-card h3,
.team-card p {
  margin: 0;
}

.team-link {
  margin-top: auto;
  font-weight: 700;
  color: var(--color-accent-strong);
}

.team-link:hover {
  color: var(--color-brand);
}

.about-intro-copy .lead + .lead {
  margin-top: -0.9rem;
}

.panel {
  border: 1px solid var(--color-line);
  border-radius: 2rem;
  background: #fff;
  box-shadow: var(--shadow-panel);
  padding: 1.75rem;
}

.badge,
.chip,
.tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.badge {
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--color-line);
  background: var(--color-panel);
  color: var(--color-accent-strong);
}

.chip {
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-line);
  background: #fff;
  color: var(--color-ink);
  cursor: pointer;
}

.chip-active {
  border-color: var(--color-brand);
  background: var(--color-brand);
  color: #fff;
}

.chip-note {
  border-style: dashed;
  background: var(--color-panel);
  color: var(--color-muted);
  cursor: default;
}

.tag {
  padding: 0.4rem 0.8rem;
  background: rgba(42, 64, 65, 0.09);
  color: var(--color-brand);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.9rem 1.35rem;
  border: 0;
  border-radius: 999px;
  font-weight: 700;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

.btn-primary:hover {
  background: #98f28b;
}

.btn-accent {
  background: var(--color-accent-strong);
  color: #fff;
}

.btn-accent:hover {
  background: var(--color-ink);
}

.btn-light {
  background: #fff;
  color: var(--color-ink);
}

.btn-light:hover {
  background: var(--color-panel-strong);
}

.btn-outline {
  border: 1px solid rgba(255, 255, 255, 0.34);
  color: #fff;
  background: transparent;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
}

.site-alert {
  border-bottom: 1px solid rgba(236, 110, 62, 0.18);
  background: rgba(236, 110, 62, 0.14);
}

.site-alert .shell {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.site-alert .shell.site-alert-center {
  position: relative;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.site-alert .shell.site-alert-center > div {
  margin: 0 auto;
}

.site-alert .shell.site-alert-center button {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
}

.site-alert button {
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 auto;
  border: 1px solid rgba(236, 110, 62, 0.18);
  border-radius: 999px;
  background: #fff;
  cursor: pointer;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(18px);
  box-shadow: 0 4px 20px rgba(36, 40, 39, 0.08);
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.75rem;
  min-height: 5rem;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 0.4rem;
}

.brand img {
  width: min(190px, 52vw);
  height: auto;
}

.menu-toggle {
  display: none;
  width: 2.9rem;
  height: 2.9rem;
  border: 1px solid var(--color-line);
  border-radius: 1rem;
  background: #fff;
  color: var(--color-ink);
}

.site-nav {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: stretch;
  gap: 0.55rem;
  flex: 0 1 760px;
  width: min(100%, 760px);
  min-width: 0;
}

.site-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.65rem 0.9rem;
  border-radius: 0.9rem;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--color-ink);
  text-align: center;
}

.site-nav a:hover,
.site-nav a.is-active {
  background: rgba(42, 64, 65, 0.1);
  color: var(--color-brand);
}

.site-nav .nav-portal {
  background: linear-gradient(135deg, rgba(36, 40, 39, 1), rgba(42, 64, 65, 0.96));
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.site-nav .nav-portal:hover,
.site-nav .nav-portal.is-active {
  background: linear-gradient(135deg, rgba(30, 34, 33, 1), rgba(36, 56, 57, 0.98));
  color: #fff;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 72vh;
  color: #fff;
  background: var(--color-ink);
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

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

.hero-overlay {
  background: linear-gradient(90deg, rgba(36, 40, 39, 0.82) 0%, rgba(36, 40, 39, 0.64) 38%, rgba(36, 40, 39, 0.22) 68%, rgba(36, 40, 39, 0.12) 100%);
}

.hero-content {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 72vh;
  padding: 5rem 0;
}

.hero-copy {
  max-width: 42rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.split {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.05fr 0.95fr;
}

.split-center {
  align-items: center;
}

.hero-frame {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: 2rem;
  background: #fff;
  box-shadow: 0 28px 80px rgba(36, 40, 39, 0.14);
}

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

.hero-frame .image-wrap {
  aspect-ratio: 16 / 10;
}

.about-hero-frame {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.about-hero-frame .image-wrap {
  flex: 1 1 auto;
  min-height: 28rem;
  aspect-ratio: auto;
}

.application-pilot-frame .image-wrap {
  aspect-ratio: auto;
}

.application-pilot-frame {
  width: min(100%, 24rem);
  justify-self: end;
}

.application-pilot-frame img {
  height: auto;
  object-fit: contain;
}

.hero-frame-tall .image-wrap {
  aspect-ratio: 24 / 10;
}

.hero-frame .image-caption {
  padding: 1.5rem;
}

.hero-frame .image-caption h2,
.hero-frame .image-caption h3,
.card h3 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: -0.04em;
}

.checklist {
  padding: 0;
  margin: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.checklist li {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
}

.checklist strong {
  color: var(--color-accent-soft);
}

.step-list {
  display: grid;
  gap: 1rem;
}

.step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.step.step-align-title {
  align-items: center;
}

.step-dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--color-brand);
  color: #fff;
  font-weight: 700;
}

.process-flow {
  --process-gap: 2.5rem;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--process-gap);
  align-items: stretch;
}

.process-step {
  position: relative;
}

.process-step .card {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 7.5rem;
  text-align: center;
}

.process-step-head {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  padding-left: 0.35rem;
}

.process-step-head h3 {
  margin: 0;
}

.process-step:not(:last-child)::after {
  content: "→";
  position: absolute;
  top: 50%;
  right: calc(var(--process-gap) / -2);
  transform: translate(50%, -50%);
  color: var(--color-accent-strong);
  font-size: 1.5rem;
  font-weight: 700;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: 1.75rem;
  background: #fff;
  box-shadow: var(--shadow-card);
}

.monitoring-config-grid {
  grid-template-columns: repeat(var(--monitoring-columns, 5), minmax(0, 1fr));
  gap: 1rem;
}

.monitoring-config-grid .card {
  height: 100%;
}

.monitoring-config-grid .monitoring-config-cta {
  grid-column: 1 / -1;
}

.monitoring-config-cta {
  display: grid;
  gap: 1rem;
  text-align: left;
}

.monitoring-config-cta p {
  margin: 0;
}

.pollution-config-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  min-height: 14rem;
  padding: 1.35rem 2rem;
  overflow: hidden;
  border: 2px solid #5f6f79;
  border-radius: 1.5rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(0, 0, 0, 0.04)),
    repeating-linear-gradient(
      90deg,
      #8596a0 0,
      #8596a0 22px,
      #788891 22px,
      #788891 28px
    );
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    inset 0 -1px 0 rgba(0, 0, 0, 0.08),
    var(--shadow-card);
}

.pollution-config-grid::before,
.pollution-config-grid::after {
  content: "";
  position: absolute;
  top: 1rem;
  bottom: 1rem;
  width: 12px;
  border-radius: 0.35rem;
  background: linear-gradient(180deg, #667780, #4e5f68);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.14),
    inset 0 -1px 0 rgba(0, 0, 0, 0.18);
}

.pollution-config-grid::before {
  left: 0.9rem;
}

.pollution-config-grid::after {
  right: 0.9rem;
}

.pollution-config-card {
  position: relative;
  display: grid;
  gap: 1rem;
  min-height: 16rem;
  border-width: 2px;
  z-index: 1;
}

.pollution-config-card h3,
.pollution-config-card p {
  margin: 0;
}

.pollution-config-card .tag {
  width: fit-content;
}

.pollution-config-empty {
  display: grid;
  place-items: center;
  gap: 0.85rem;
  min-height: 100%;
  text-align: center;
  background: rgba(255, 255, 255, 0.78);
  color: var(--color-ink);
  z-index: 1;
}

.pollution-config-empty h3 {
  margin: 0;
  color: var(--color-ink);
}

.pollution-config-empty .tag {
  background: rgba(42, 64, 65, 0.12);
  color: var(--color-brand);
  border: 1px solid rgba(42, 64, 65, 0.14);
}

.pollution-config-remove {
  position: absolute;
  top: 0.9rem;
  right: 0.9rem;
  width: 2rem;
  height: 2rem;
  border: 0;
  border-radius: 999px;
  background: rgba(36, 40, 39, 0.08);
  color: var(--color-ink);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
}

.pollution-config-remove:hover {
  background: rgba(36, 40, 39, 0.16);
}

.pollution-theme-pm25 {
  border-color: #6b7bff;
  background: linear-gradient(180deg, #eef1ff 0%, #ffffff 100%);
}

.pollution-theme-vocs {
  border-color: #ec6e3e;
  background: linear-gradient(180deg, #fff0e9 0%, #ffffff 100%);
}

.pollution-theme-hydrocarbons {
  border-color: #045681;
  background: linear-gradient(180deg, #e9f4fb 0%, #ffffff 100%);
}

.pollution-theme-co {
  border-color: #00735c;
  background: linear-gradient(180deg, #e7f8f2 0%, #ffffff 100%);
}

.pollution-theme-nox {
  border-color: #9a5de0;
  background: linear-gradient(180deg, #f2ebff 0%, #ffffff 100%);
}

.pollution-theme-sox {
  border-color: #b84c6f;
  background: linear-gradient(180deg, #fdebf1 0%, #ffffff 100%);
}

.pollution-theme-odors {
  border-color: #7f7a33;
  background: linear-gradient(180deg, #faf7dc 0%, #ffffff 100%);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 1rem 1.25rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-line);
}

th {
  background: var(--color-panel);
}

.band-card {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 1.5rem;
  backdrop-filter: blur(10px);
}

.cta-panel {
  border: 1px solid var(--color-line);
  border-radius: 2rem;
  background: linear-gradient(135deg, rgba(18, 33, 56, 1), rgba(33, 58, 96, 1));
  color: #fff;
  box-shadow: 0 28px 80px rgba(16, 31, 55, 0.22);
  padding: 2rem;
}

.site-footer {
  background: linear-gradient(135deg, rgba(36, 40, 39, 1), rgba(42, 64, 65, 0.96));
  color: #fff;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  padding: 2.1rem 0;
  align-items: center;
}

.footer-left-note {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.9rem;
}

.footer-left-note p {
  margin: 0;
}

.footer-sitemap {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.footer-sitemap-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 0;
}

.footer-sitemap a {
  display: inline-flex;
  position: relative;
  padding-right: 0.9rem;
  margin-right: 0.6rem;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.88rem;
}

.footer-sitemap a::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0;
  width: 0.22rem;
  height: 0.22rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.52);
  transform: translateY(-50%);
}

.footer-sitemap-row a:last-child::after {
  display: none;
}

.footer-sitemap-row a:last-child {
  margin-right: 0;
  padding-right: 0;
}

.footer-sitemap a:hover {
  color: #fff;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem 1rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: #fff;
}

.footer-mark {
  width: min(280px, 100%);
  height: auto;
}

.footer-brand {
  display: grid;
  width: 100%;
  justify-self: center;
  justify-items: center;
  gap: 0.9rem;
  text-align: center;
}

.footer-brand-text {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1rem;
}

.footer-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
}

.footer-meta-text {
  width: 12rem;
  margin: 0;
  text-align: right;
  color: rgba(255, 255, 255, 0.8);
}

.linkedin-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.78);
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.linkedin-icon-link:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.08);
}

.linkedin-icon-link svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}

.footer-bar {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.8rem 0 0.95rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hubspot-panel {
  display: grid;
  gap: 1rem;
}

.contact-intro {
  max-width: 46rem;
  margin: 0 auto;
}

.contact-intro .lead {
  margin-left: auto;
  margin-right: auto;
}

.contact-form-panel {
  width: min(100%, 52rem);
  margin: 0 auto;
}

.hubspot-panel > * {
  margin: 0;
}

.hubspot-embed-shell {
  position: relative;
  min-height: 44rem;
  border: 1px solid var(--color-line);
  border-radius: 1.5rem;
  background: linear-gradient(180deg, rgba(238, 243, 241, 0.8), #fff);
  overflow: hidden;
}

.hubspot-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  gap: 0.85rem;
  padding: 2rem;
  text-align: center;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(238, 243, 241, 0.92)),
    repeating-linear-gradient(
      -45deg,
      rgba(42, 64, 65, 0.03) 0,
      rgba(42, 64, 65, 0.03) 14px,
      rgba(42, 64, 65, 0.06) 14px,
      rgba(42, 64, 65, 0.06) 28px
    );
}

.hubspot-embed-shell.is-loaded .hubspot-loading {
  display: none;
}

.hubspot-embed {
  position: relative;
  z-index: 1;
  min-height: 44rem;
  width: 100%;
}

.hubspot-embed iframe,
.hubspot-embed > iframe {
  width: 100% !important;
  min-height: 44rem !important;
  border: 0 !important;
  display: block;
  background: transparent;
}

.hubspot-embed > div,
.hubspot-embed > div > iframe {
  width: 100% !important;
}

.helper,
.muted {
  color: var(--color-muted);
}

.center {
  text-align: center;
}

@media (max-width: 960px) {
  .grid-4,
  .grid-3,
  .grid-2,
  .split,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .process-flow {
    grid-template-columns: 1fr;
  }

  .monitoring-config-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

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

  .process-step:not(:last-child)::after {
    content: "↓";
    top: auto;
    bottom: calc(var(--process-gap) / -2);
    right: 50%;
    transform: translate(50%, 50%);
  }

  .site-nav {
    position: absolute;
    inset: calc(100% + 1px) 0 auto;
    display: none;
    grid-template-columns: 1fr;
    align-items: stretch;
    padding: 0.9rem;
    border-top: 1px solid var(--color-line);
    background: #fff;
  }

  .site-nav.is-open {
    display: grid;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .header-bar {
    position: relative;
  }

  .footer-links {
    justify-content: center;
  }

  .footer-left-note,
  .footer-meta {
    justify-content: center;
  }

  .footer-left-note {
    align-items: center;
  }

  .footer-sitemap {
    align-items: center;
  }

  .hubspot-embed-shell,
  .hubspot-embed,
  .hubspot-embed iframe,
  .hubspot-embed > iframe {
    min-height: 38rem !important;
  }

  .footer-meta-text {
    width: auto;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 4rem 0;
  }

  .hero-copy .actions,
  .actions {
    flex-direction: column;
    align-items: stretch;
  }

  .shell {
    width: min(1280px, calc(100% - 1.25rem));
  }

  .pollution-config-grid {
    grid-template-columns: 1fr;
  }

  .monitoring-config-grid {
    grid-template-columns: 1fr;
  }
}