:root {
  --zp-green-darkest: #062417;
  --zp-green-dark: #085132;
  --zp-green: #366d56;
  --zp-green-soft: #94baa7;
  --zp-green-mist: #d6e6de;
  --zp-green-pale: #edf3f0;
  --zp-green-fog: #f5faf8;
  --zp-grey-1: #4f4f4f;
  --zp-grey-2: #757575;
  --zp-grey-3: #b3b3b3;
  --zp-white: #ffffff;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(6, 36, 23, 0.05);
  --shadow-md: 0 4px 12px rgba(6, 36, 23, 0.08);

  --transition: 150ms ease;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--zp-green-darkest);
  background: var(--zp-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--zp-green-dark);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--zp-green-darkest);
}

h1,
h2,
h3 {
  margin: 0 0 0.5em;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--zp-green-darkest);
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.125rem;
  line-height: 1.3;
}

p {
  margin: 0 0 1rem;
  color: var(--zp-grey-1);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--zp-green-mist);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 16px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--zp-green-darkest);
  font-weight: 600;
}

.brand img {
  display: block;
}

.brand__tagline {
  font-size: 0.875rem;
  color: var(--zp-grey-2);
  border-left: 1px solid var(--zp-green-mist);
  padding-left: 10px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
  font-size: 0.9375rem;
}

.site-nav a {
  color: var(--zp-grey-1);
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.site-nav a:hover {
  color: var(--zp-green-darkest);
  border-bottom-color: var(--zp-green-dark);
}

.cta {
  background: var(--zp-green-dark);
  color: var(--zp-white);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
}

.cta:hover {
  background: var(--zp-green-darkest);
  color: var(--zp-white);
  transform: translateY(-1px);
}

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--zp-green-fog) 0%, var(--zp-white) 100%);
  padding: 80px 0 64px;
  text-align: center;
}

.hero__logo {
  display: inline-block;
  margin-bottom: 24px;
  filter: drop-shadow(0 1px 2px rgba(6, 36, 23, 0.05));
}

.hero__lead {
  max-width: 680px;
  margin: 16px auto 32px;
  font-size: 1.125rem;
  color: var(--zp-grey-1);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.btn--primary {
  background: var(--zp-green-dark);
  color: var(--zp-white);
}

.btn--primary:hover {
  background: var(--zp-green-darkest);
  color: var(--zp-white);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--zp-green-dark);
  border: 1px solid var(--zp-green-mist);
}

.btn--ghost:hover {
  background: var(--zp-green-pale);
  border-color: var(--zp-green-soft);
  color: var(--zp-green-darkest);
}

/* Sections */
.section {
  padding: 64px 0;
}

.section--alt {
  background: var(--zp-green-fog);
}

.cards {
  display: grid;
  gap: 16px;
}

.cards--3 {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.cards--2 {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.card {
  display: block;
  padding: 24px;
  background: var(--zp-white);
  border: 1px solid var(--zp-green-mist);
  border-radius: var(--radius-md);
  color: var(--zp-green-darkest);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--zp-green-soft);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--zp-green-darkest);
}

.card__icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--zp-green-pale);
  border-radius: var(--radius-sm);
}

.card h3 {
  margin-bottom: 6px;
}

.card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--zp-grey-1);
}

.card--accent {
  background: linear-gradient(180deg, var(--zp-white) 0%, var(--zp-green-fog) 100%);
}

.card--accent .card__icon {
  background: var(--zp-green-mist);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--zp-green-mist);
  padding: 24px 0;
  background: var(--zp-white);
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--zp-grey-2);
}

.site-footer nav {
  display: flex;
  gap: 20px;
}

.site-footer a {
  color: var(--zp-grey-1);
}

.site-footer a:hover {
  color: var(--zp-green-dark);
}

/* Responsive */
@media (max-width: 720px) {
  .site-header__inner {
    gap: 12px;
  }
  .site-nav {
    display: none;
  }
  .brand__tagline {
    display: none;
  }
  .hero {
    padding: 56px 0 40px;
  }
  .section {
    padding: 48px 0;
  }
}