:root {
  --green: #174c3c;
  --green-dark: #10382d;
  --green-soft: #e7efeb;
  --graphite: #30363a;
  --ink: #101516;
  --muted: #697174;
  --soft-white: #f4f4f1;
  --white: #ffffff;
  --line: #d8ddda;
  --shadow: 0 18px 48px rgba(24, 44, 37, .10);
  --shadow-small: 0 10px 28px rgba(24, 44, 37, .08);
  --radius: 18px;
  --radius-small: 12px;
  --max: 1180px;
  --font-brand: "Sora", "Avenir Next", "Segoe UI", Arial, sans-serif;
  --font-body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--graphite);
  background: var(--soft-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
button, .button { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: -100px;
  z-index: 9999;
  padding: .8rem 1rem;
  background: var(--ink);
  color: var(--white);
  border-radius: 8px;
}
.skip-link:focus { top: 1rem; }

.container {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
}
.narrow { width: min(calc(100% - 40px), 850px); margin-inline: auto; }
.section { padding: 96px 0; }
.section--white { background: var(--white); }
.section--green { background: var(--green); color: var(--white); }
.section--compact { padding: 68px 0; }

.eyebrow {
  margin: 0 0 .8rem;
  color: var(--green);
  font-family: var(--font-brand);
  font-size: .77rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.section--green .eyebrow { color: #cfe0d8; }

h1, h2, h3 {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-brand);
  line-height: 1.12;
  letter-spacing: -.025em;
}
h1 { max-width: 860px; font-size: clamp(2.6rem, 6vw, 5.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.55rem); }
h3 { font-size: 1.22rem; }
.section--green h2, .section--green h3 { color: var(--white); }

.lede {
  max-width: 750px;
  margin: 1.3rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
}
.section--green .lede { color: #e0ebe6; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(244, 244, 241, .94);
  border-bottom: 1px solid rgba(48, 54, 58, .10);
  backdrop-filter: blur(16px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  gap: 2rem;
}
.brand-logo { width: 250px; height: auto; }
.site-nav { display: flex; align-items: center; gap: 1.55rem; }
.site-nav a {
  color: var(--graphite);
  font-size: .88rem;
  font-weight: 650;
  text-decoration: none;
}
.site-nav a:hover, .site-nav a:focus-visible { color: var(--green); }
.nav-cta {
  padding: .66rem 1rem;
  color: var(--white) !important;
  background: var(--green);
  border-radius: 999px;
}
.nav-cta:hover, .nav-cta:focus-visible { background: var(--green-dark); }

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--white);
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--graphite);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 100px 0 88px;
  background:
    radial-gradient(circle at 87% 12%, rgba(23, 76, 60, .12), transparent 28rem),
    linear-gradient(135deg, var(--soft-white) 0%, #fff 65%);
}
.hero::after {
  content: "";
  position: absolute;
  right: -8rem;
  bottom: -9rem;
  width: 34rem;
  height: 34rem;
  border: 1px solid rgba(23, 76, 60, .12);
  border-radius: 50%;
  box-shadow:
    0 0 0 54px rgba(23, 76, 60, .03),
    0 0 0 108px rgba(23, 76, 60, .025);
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, .65fr);
  align-items: center;
  gap: 70px;
}
.hero-copy { position: relative; }
.hero-copy::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 4px;
  width: 7px;
  height: 76px;
  background: var(--green);
  border-radius: 999px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 2rem;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: .78rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 11px;
  font-family: var(--font-brand);
  font-size: .88rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.button:hover { transform: translateY(-2px); }
.button--primary { color: var(--white); background: var(--green); }
.button--primary:hover { background: var(--green-dark); }
.button--secondary {
  color: var(--green);
  background: var(--white);
  border-color: var(--green);
}
.button--secondary:hover { background: var(--green-soft); }
.button--light { color: var(--green); background: var(--white); }
.button--outline-light {
  color: var(--white);
  background: transparent;
  border-color: rgba(255,255,255,.56);
}
.button--outline-light:hover { background: rgba(255,255,255,.10); }

.hero-note {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin-top: 1.6rem;
}
.chip {
  padding: .42rem .72rem;
  color: var(--green);
  background: var(--green-soft);
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 650;
}
.hero-panel {
  position: relative;
  padding: 32px;
  background: var(--green);
  border-radius: 26px;
  box-shadow: var(--shadow);
}
.hero-panel::before {
  content: "";
  position: absolute;
  inset: 13px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 18px;
}
.hero-icon {
  width: 116px;
  margin: 0 auto 28px;
  filter: drop-shadow(0 16px 22px rgba(0,0,0,.16));
}
.hero-panel h2 {
  color: var(--white);
  font-size: 1.35rem;
  text-align: center;
}
.hero-panel p {
  margin: .85rem 0 0;
  color: #dce9e3;
  text-align: center;
  font-size: .94rem;
}
.signal-line {
  position: relative;
  height: 22px;
  margin: 30px auto 0;
}
.signal-line::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  right: 0;
  height: 2px;
  background:
    linear-gradient(90deg,
      transparent 0 6%,
      rgba(255,255,255,.75) 6% 27%,
      transparent 27% 32%,
      rgba(255,255,255,.75) 32% 60%,
      transparent 60% 66%,
      rgba(255,255,255,.75) 66% 94%,
      transparent 94%);
}
.signal-line span {
  position: absolute;
  top: 5px;
  width: 12px;
  height: 12px;
  background: var(--green);
  border: 2px solid var(--white);
  border-radius: 50%;
}
.signal-line span:nth-child(1) { left: 25%; }
.signal-line span:nth-child(2) { left: 58%; }
.signal-line span:nth-child(3) { left: 92%; }

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 42px;
}
.section-heading p { max-width: 540px; margin: 0; color: var(--muted); }
.section--green .section-heading p { color: #dce9e3; }

.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.service-card {
  position: relative;
  min-height: 350px;
  padding: 36px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-small);
}
.service-card::after {
  content: "";
  position: absolute;
  right: -52px;
  bottom: -52px;
  width: 180px;
  height: 180px;
  border: 24px solid var(--green-soft);
  border-radius: 50%;
}
.card-number {
  color: var(--green);
  font-family: var(--font-brand);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .14em;
}
.service-card h3 { margin-top: 2.2rem; font-size: 1.75rem; }
.service-card p { max-width: 520px; color: var(--muted); }
.check-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: .7rem;
  padding: 0;
  margin: 1.5rem 0 0;
  list-style: none;
}
.check-list li {
  position: relative;
  padding-left: 1.65rem;
  font-size: .92rem;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .45rem;
  width: 9px;
  height: 9px;
  background: var(--green);
  border-radius: 2px;
  transform: rotate(45deg);
}

.standards-grid {
  display: grid;
  grid-template-columns: 1.15fr repeat(3, .8fr);
  gap: 22px;
}
.standard-intro {
  padding: 32px 28px;
  color: var(--white);
  background: var(--green);
  border-radius: var(--radius);
}
.standard-intro h2 { color: var(--white); font-size: 2.4rem; }
.standard-intro p { color: #deebe5; }
.standard-card {
  padding: 29px 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
}
.standard-card .icon-box {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 1.4rem;
  color: var(--green);
  background: var(--green-soft);
  border-radius: 10px;
  font-family: var(--font-brand);
  font-weight: 800;
}
.standard-card p { margin-bottom: 0; color: var(--muted); font-size: .92rem; }

.sell-layout {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 58px;
  align-items: start;
}
.sell-copy { position: sticky; top: 120px; }
.sell-copy .direct-email {
  display: inline-block;
  margin-top: 1.2rem;
  color: var(--white);
  font-weight: 750;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.buy-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .65rem 1rem;
  padding: 0;
  margin: 1.8rem 0 0;
  list-style: none;
}
.buy-list li {
  position: relative;
  padding-left: 1.45rem;
  color: #e0ebe6;
  font-size: .9rem;
}
.buy-list li::before {
  content: "+";
  position: absolute;
  left: 0;
  color: var(--white);
  font-weight: 800;
}
.form-card {
  padding: 32px;
  color: var(--graphite);
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 22px 58px rgba(0,0,0,.16);
}
.form-card h3 { font-size: 1.45rem; }
.form-note { margin: .45rem 0 1.6rem; color: var(--muted); font-size: .88rem; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.field--full { grid-column: 1 / -1; }
label {
  display: block;
  margin-bottom: .42rem;
  color: var(--graphite);
  font-size: .78rem;
  font-weight: 750;
}
input, textarea, select {
  width: 100%;
  padding: .82rem .9rem;
  color: var(--ink);
  background: #fbfcfb;
  border: 1px solid #cfd6d2;
  border-radius: 9px;
  outline: none;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(23, 76, 60, .13);
}
textarea { min-height: 115px; resize: vertical; }
.form-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.35rem;
}
.form-status { min-height: 1.4em; color: var(--green); font-size: .84rem; }
.honeypot { position: absolute !important; left: -9999px !important; }

.about-grid {
  display: grid;
  grid-template-columns: 1fr .9fr;
  gap: 64px;
  align-items: center;
}
.about-copy p { color: var(--muted); }
.about-panel {
  padding: 34px;
  background: var(--soft-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.about-panel img { width: 84px; margin-bottom: 1.5rem; }
.about-panel dl { display: grid; grid-template-columns: 120px 1fr; gap: .85rem 1rem; margin: 0; }
.about-panel dt {
  color: var(--green);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.about-panel dd { margin: 0; color: var(--graphite); }

.contact-band {
  display: grid;
  grid-template-columns: 1.2fr auto;
  align-items: center;
  gap: 40px;
  padding: 42px;
  color: var(--white);
  background: var(--green);
  border-radius: 24px;
}
.contact-band h2 { max-width: 720px; color: var(--white); font-size: clamp(2rem, 4vw, 3.25rem); }
.contact-band p { color: #dce9e3; }

.site-footer {
  padding: 62px 0 28px;
  color: #dce4e1;
  background: var(--ink);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr .75fr;
  gap: 58px;
}
.footer-logo { width: 220px; margin-bottom: 1.3rem; }
.footer-copy { max-width: 460px; color: #adb8b4; }
.footer-title {
  margin: 0 0 .8rem;
  color: var(--white);
  font-family: var(--font-brand);
  font-size: .8rem;
  font-weight: 750;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.footer-links { display: grid; gap: .6rem; }
.footer-links a { color: #c5d0cc; text-decoration: none; }
.footer-links a:hover { color: var(--white); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 50px;
  padding-top: 22px;
  color: #8f9b97;
  border-top: 1px solid rgba(255,255,255,.13);
  font-size: .77rem;
}

.page-hero {
  padding: 92px 0 60px;
  background: linear-gradient(135deg, var(--soft-white), var(--white));
}
.prose { padding: 72px 0 100px; background: var(--white); }
.prose h2 { margin-top: 2.2rem; font-size: 1.5rem; }
.prose h3 { margin-top: 1.7rem; font-size: 1.1rem; }
.prose p, .prose li { color: #50595c; }
.prose a { color: var(--green); font-weight: 650; }
.prose .updated {
  display: inline-block;
  margin-top: 1rem;
  color: var(--muted);
  font-size: .85rem;
}

.error-page {
  display: grid;
  place-items: center;
  min-height: 72vh;
  padding: 80px 20px;
  text-align: center;
}
.error-icon { width: 110px; margin: 0 auto 2rem; }
.error-page p { max-width: 600px; margin-inline: auto; color: var(--muted); }

:focus-visible { outline: 3px solid rgba(23,76,60,.35); outline-offset: 3px; }

@media (max-width: 980px) {
  .menu-toggle { display: block; }
  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 18px 20px 24px;
    background: var(--soft-white);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-small);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .75rem 0; }
  .nav-cta { margin-top: .5rem; text-align: center; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-panel { max-width: 560px; }
  .standards-grid { grid-template-columns: repeat(2, 1fr); }
  .standard-intro { grid-column: 1 / -1; }
  .sell-layout, .about-grid { grid-template-columns: 1fr; }
  .sell-copy { position: static; }
}

@media (max-width: 720px) {
  .container, .narrow { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 72px 0; }
  .brand-logo { width: 205px; }
  .header-inner { min-height: 72px; }
  .hero { padding: 78px 0 64px; }
  .hero-copy::before { display: none; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 1rem; }
  .card-grid, .standards-grid, .form-grid { grid-template-columns: 1fr; }
  .field--full { grid-column: auto; }
  .service-card { min-height: auto; padding: 28px; }
  .buy-list { grid-template-columns: 1fr; }
  .form-card { padding: 24px 20px; }
  .about-panel dl { grid-template-columns: 1fr; gap: .2rem; }
  .about-panel dd { margin-bottom: .8rem; }
  .contact-band { grid-template-columns: 1fr; padding: 30px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 35px; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

@media print {
  .site-header, .hero-actions, .menu-toggle, .site-footer { display: none !important; }
  body { background: white; color: black; }
  .section { padding: 24px 0; }
}