:root {
  --color-page: #f7fbf9;
  --color-surface: #ffffff;
  --color-ink: #17211d;
  --color-muted: #5b6b64;
  --color-line: #cfded7;
  --color-accent: #087f5b;
  --color-accent-strong: #056344;
  --color-warm: #e3553f;
  --shadow-card: 0 18px 42px rgba(23, 33, 29, 0.14);
  --font-base: "Montserrat", Arial, sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-base);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-ink);
  background:
    linear-gradient(180deg, rgba(8, 127, 91, 0.12), rgba(247, 251, 249, 0) 18rem),
    var(--color-page);
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
  padding: 0.875rem 2rem;
  background: rgba(247, 251, 249, 0.92);
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: blur(14px);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent-strong);
  text-decoration: none;
}

.site-header__brand img {
  display: block;
  width: 9.3125rem;
  height: auto;
}

.site-header__brand span {
  padding-left: 0.75rem;
  border-left: 1px solid var(--color-line);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  font-weight: 700;
}

.site-header__nav a {
  text-decoration: none;
  color: var(--color-muted);
}

.site-header__nav a:hover,
.site-header__nav a:focus-visible {
  color: var(--color-accent-strong);
}

.intro {
  padding: 5rem 2rem 3rem;
}

.intro__content,
.demo-section {
  width: min(72rem, 100%);
  margin: 0 auto;
}

.intro__eyebrow,
.demo-section__eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
  color: var(--color-warm);
}

.intro h1 {
  max-width: 52rem;
  margin: 0;
  font-size: 3rem;
  line-height: 1.1;
}

.intro__text {
  max-width: 43rem;
  margin: 1rem 0 0;
  font-size: 1.125rem;
  color: var(--color-muted);
}

.demo-section {
  padding: 1rem 2rem 5rem;
}

.demo-section__header {
  margin-bottom: 1.5rem;
}

.demo-section h2 {
  margin: 0;
  font-size: 2rem;
  line-height: 1.2;
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 21rem), 1fr));
  gap: 1.25rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.demo-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
}

.demo-card__image {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.demo-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.875rem;
  padding: 1.25rem;
}

.demo-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.demo-card__meta span {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent-strong);
  background: rgba(8, 127, 91, 0.1);
  border-radius: 8px;
}

.demo-card h3 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.25;
}

.demo-card p {
  margin: 0;
  color: var(--color-muted);
}

.demo-card__link {
  align-self: flex-start;
  margin-top: auto;
  padding: 0.7rem 1rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: #ffffff;
  text-decoration: none;
  background: var(--color-accent);
  border-radius: 8px;
}

.demo-card__link:hover,
.demo-card__link:focus-visible {
  background: var(--color-accent-strong);
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem;
  }

  .intro {
    padding: 3rem 1rem 2rem;
  }

  .intro h1 {
    font-size: 2.25rem;
  }

  .site-header__brand {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.4rem;
  }

  .site-header__brand span {
    padding-left: 0;
    border-left: 0;
  }

  .demo-section {
    padding: 1rem 1rem 3rem;
  }
}