:root {
  --duo-green: #58cc02;
  --duo-green-light: #61e002;
  --duo-green-dark: #46a302;
  --duo-green-shadow: #58a700;
  --ink: #3c3c3c;
  --ink-strong: #4b4b4b;
  --muted: #777777;
  --muted-light: #afafaf;
  --canvas: #ffffff;
  --wash-blue: #ddf4ff;
  --surface: #ffffff;
  --surface-alt: #f7f7f7;
  --border: #e5e5e5;
  --border-strong: #dadada;
  --link-blue: #1cb0f6;
  --link-blue-dark: #1b99d6;
  --navy: #042c60;
  --super-navy: #100f3e;
  --footer-soft: #d7ffb8;
  --warning: #ffc800;
  --streak: #ff9600;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;
  --max: 988px;
  --wide: 1090px;
  --section-pad: 96px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Nunito", system-ui, sans-serif;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.41;
  color: var(--muted);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--link-blue);
  text-decoration: none;
}

a:hover {
  color: var(--link-blue-dark);
}

a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--link-blue);
  outline-offset: 2px;
}

.btn-primary:focus-visible {
  outline-color: var(--duo-green-dark);
}

.container {
  width: min(100% - 32px, var(--max));
  margin-inline: auto;
}

.container--wide {
  width: min(100% - 32px, var(--wide));
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--canvas);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Nunito", sans-serif;
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--ink-strong);
  letter-spacing: -0.02em;
}

.logo__mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.header-cta {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform 0.1s ease, background 0.15s ease, box-shadow 0.1s ease;
}

.btn--primary {
  color: #fff;
  background: var(--duo-green);
  box-shadow: 0 4px 0 var(--duo-green-shadow);
}

.btn--primary:hover {
  background: var(--duo-green-light);
  color: #fff;
}

.btn--primary:active {
  transform: translateY(4px);
  box-shadow: none;
  background: var(--duo-green-dark);
}

.btn--secondary {
  color: var(--link-blue);
  background: var(--surface);
  border: 2px solid var(--border);
  box-shadow: 0 4px 0 var(--border-strong);
}

.btn--secondary:hover {
  background: var(--wash-blue);
  border-color: var(--link-blue);
  color: var(--link-blue-dark);
}

.btn--secondary:active {
  transform: translateY(4px);
  box-shadow: none;
}

.btn--block {
  width: 100%;
  max-width: 330px;
}

.btn--lg {
  min-height: 56px;
  font-size: 16px;
}

/* Hero */
.hero {
  padding: 48px 0 56px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.hero__visual {
  order: 2;
  display: flex;
  justify-content: center;
}

.hero__copy {
  order: 1;
  text-align: center;
}

.hero__brand {
  margin: 0 0 12px;
  font-family: "Nunito", sans-serif;
  font-size: clamp(2.75rem, 10vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--duo-green);
  text-transform: none;
}

.hero__title {
  margin: 0 0 16px;
  font-size: clamp(1.35rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink-strong);
  max-width: 480px;
  margin-inline: auto;
}

.hero__lead {
  margin: 0 0 28px;
  max-width: 473px;
  margin-inline: auto;
}

.hero__actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.hero__note {
  margin: 16px 0 0;
  font-size: 14px;
  color: var(--muted-light);
}

.hero-illustration {
  width: min(100%, 424px);
  aspect-ratio: 424 / 380;
}

/* Trust rail */
.trust-rail {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface-alt);
  padding: 20px 0;
}

.trust-rail__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px 32px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.trust-rail__item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.trust-rail__icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

/* Sections */
.section {
  padding: var(--section-pad) 0;
}

.section--wash {
  background: var(--wash-blue);
}

.section__head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section__title {
  margin: 0 0 12px;
  font-family: "Nunito", sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--duo-green);
  letter-spacing: -0.005em;
}

.section__subtitle {
  margin: 0;
  font-size: 17px;
}

/* Feature rows */
.feature {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 72px;
}

.feature:last-child {
  margin-bottom: 0;
}

.feature--reverse .feature__visual {
  order: 2;
}

.feature--reverse .feature__text {
  order: 1;
}

.feature__title {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--ink-strong);
  line-height: 1.25;
}

.feature__body {
  margin: 0 0 20px;
}

.feature__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature__list li {
  position: relative;
  padding-left: 32px;
  margin-bottom: 10px;
}

.feature__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 22px;
  height: 22px;
  background: var(--duo-green);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3'%3E%3Cpath d='M5 12l5 5L19 7'/%3E%3C/svg%3E");
  background-size: 14px;
  background-repeat: no-repeat;
  background-position: center;
}

.feature-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 2px solid var(--border);
  box-shadow: 0 4px 0 var(--border-strong);
}

.feature-visual {
  width: min(100%, 530px);
  margin-inline: auto;
}

/* Benefits grid */
.benefits {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.benefit-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 2px solid var(--border);
  box-shadow: 0 4px 0 var(--border-strong);
  transition: transform 0.15s ease;
}

.benefit-card:hover {
  transform: translateY(-2px);
}

.benefit-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
}

.benefit-card__title {
  margin: 0 0 8px;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--ink-strong);
}

.benefit-card__text {
  margin: 0;
  font-size: 16px;
}

/* Social proof */
.proof {
  text-align: center;
}

.proof__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.stat {
  padding: 20px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 2px solid var(--border);
}

.stat__value {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--duo-green);
  line-height: 1.1;
}

.stat__label {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.proof__quote {
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.125rem;
  font-style: italic;
  color: var(--ink);
}

/* Dark promo block */
.promo-dark {
  background: var(--super-navy);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.promo-dark__title {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  color: #fff;
}

.promo-dark__text {
  margin: 0 auto 28px;
  max-width: 520px;
  color: rgba(255, 255, 255, 0.75);
}

.promo-dark .btn--super {
  color: var(--super-navy);
  background: #fff;
  box-shadow: 0 4px 0 rgba(255, 255, 255, 0.35);
}

.promo-dark .btn--super:hover {
  background: var(--wash-blue);
  color: var(--super-navy);
}

.promo-dark .btn--super:active {
  box-shadow: none;
}

/* Final CTA */
.final-cta {
  position: relative;
  padding: 80px 0 120px;
  text-align: center;
  background: linear-gradient(180deg, var(--canvas) 0%, #e8f9d4 100%);
  overflow: hidden;
}

.final-cta__hills {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--duo-green);
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  transform: scaleX(1.2);
}

.final-cta__inner {
  position: relative;
  z-index: 1;
}

.final-cta__title {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--duo-green);
}

.final-cta__text {
  margin: 0 auto 28px;
  max-width: 480px;
}

/* Footer */
.site-footer {
  background: var(--duo-green);
  color: #fff;
  padding: 48px 0 32px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.site-footer__brand {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 8px;
}

.site-footer__tagline {
  margin: 0;
  color: var(--footer-soft);
  font-size: 15px;
}

.site-footer__heading {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.site-footer__links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__links li {
  margin-bottom: 8px;
}

.site-footer__links a {
  color: var(--footer-soft);
  font-weight: 600;
  font-size: 15px;
}

.site-footer__links a:hover {
  color: #fff;
}

.site-footer__bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 13px;
  color: var(--footer-soft);
  text-align: center;
}

.site-footer__bottom a {
  color: var(--footer-soft);
  text-decoration: underline;
}

.site-footer__disclaimer {
  margin-top: 12px;
  font-size: 12px;
  opacity: 0.9;
  max-width: 720px;
  margin-inline: auto;
}

/* Responsive */
@media (min-width: 768px) {
  .hero__grid {
    grid-template-columns: 424px 1fr;
    gap: 48px;
  }

  .hero__visual {
    order: 1;
  }

  .hero__copy {
    order: 2;
    text-align: left;
  }

  .hero__title,
  .hero__lead {
    margin-inline: 0;
  }

  .hero__actions {
    align-items: flex-start;
  }

  .feature {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .feature--reverse .feature__visual {
    order: 1;
  }

  .feature--reverse .feature__text {
    order: 2;
  }

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

  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .benefits {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

  .btn,
  .benefit-card {
    transition: none;
  }
}