:root {
  --bg: #f4f2ea;
  --surface: rgba(255, 255, 255, 0.74);
  --surface-strong: #fffaf0;
  --surface-dark: #172033;
  --text: #18212f;
  --muted: #465264;
  --line: rgba(24, 33, 47, 0.12);
  --accent: #0a6c74;
  --accent-strong: #08474d;
  --accent-soft: #ddf3ef;
  --warm: #d87b2d;
  --focus: #111111;
  --shadow: 0 18px 48px rgba(30, 43, 64, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1160px;
  --font-body: "Avenir Next", "Segoe UI", sans-serif;
  --font-heading: Georgia, "Times New Roman", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(10, 108, 116, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(216, 123, 45, 0.18), transparent 22%),
    linear-gradient(180deg, #f7f3ea 0%, #f2eee4 100%);
  line-height: 1.6;
}

a {
  color: inherit;
}

a:hover {
  text-decoration-thickness: 2px;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

img {
  max-width: 100%;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  transform: translateY(-200%);
  background: #ffffff;
  color: #000000;
  padding: 0.8rem 1rem;
  border-radius: 0.5rem;
  z-index: 100;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(244, 242, 234, 0.88);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.5rem;
}

.wordmark {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted);
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
}

.site-nav a[aria-current="page"] {
  color: var(--text);
  background: rgba(10, 108, 116, 0.1);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--line);
  background: #ffffff;
  border-radius: 999px;
  padding: 0.7rem 1rem;
  font: inherit;
  color: var(--text);
}

.hero {
  padding: 4rem 0 2rem;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr);
  gap: 1.5rem;
  align-items: stretch;
}

.hero__content,
.hero__panel,
.content-card,
.card,
.timeline__item,
.cta {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero__content {
  padding: clamp(2rem, 4vw, 4rem);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.72), rgba(255, 248, 235, 0.9)),
    linear-gradient(145deg, rgba(10, 108, 116, 0.12), rgba(216, 123, 45, 0.08));
  border-radius: var(--radius-lg);
}

.hero__panel {
  padding: 2rem;
  background: var(--surface-dark);
  color: #eff4f7;
  border-radius: var(--radius-lg);
}

.hero__lede,
.page-intro {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 44rem;
}

.hero__panel h2,
.card h3,
.content-card h2,
.timeline__item h3 {
  margin-top: 0;
}

.hero h1,
.page-header h1,
.section-heading h2,
.cta h2 {
  margin: 0;
  line-height: 1.08;
  font-family: var(--font-heading);
}

.hero h1 {
  font-size: clamp(2.7rem, 6vw, 5.4rem);
  max-width: 12ch;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent-strong);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.84rem;
}

.hero__actions,
.cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

.button--primary {
  background: var(--accent);
  color: #ffffff;
}

.button--primary:hover {
  background: var(--accent-strong);
}

.button--secondary {
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--line);
}

.section,
.page-shell {
  padding: 1.5rem 0 3rem;
}

.section--alt {
  background: rgba(255, 255, 255, 0.34);
}

.section-heading,
.page-header {
  margin-bottom: 1.5rem;
}

.section-heading h2,
.page-header h1 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  max-width: 14ch;
}

.card-grid,
.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.card,
.content-card {
  padding: 1.5rem;
  border-radius: var(--radius-md);
  background: var(--surface);
}

.content-card--highlight {
  background: linear-gradient(180deg, var(--accent-soft), #f7fbfa);
}

.summary-list,
.stack-list,
.number-list {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.copy-row {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.copy-button {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  border-radius: 0.6rem;
  min-height: 1.9rem;
  padding: 0.18rem 0.62rem;
  font: inherit;
  font-size: 0.88rem;
  line-height: 1.1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.copy-button:hover {
  background: var(--accent-soft);
}

.copy-button:active {
  transform: scale(0.96);
}

.copy-button.is-copied {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.feedback-toast {
  position: fixed;
  left: 1rem;
  bottom: 1rem;
  z-index: 40;
  max-width: min(22rem, calc(100vw - 2rem));
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(23, 32, 51, 0.96);
  color: #f5f7fb;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(1rem);
  pointer-events: none;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.feedback-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.timeline__item {
  padding: 1.5rem;
  border-radius: var(--radius-md);
  background: var(--surface-strong);
}

.cta {
  justify-content: space-between;
  align-items: center;
  padding: 1.6rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #fff7ea, #f1faf7);
}

.site-footer {
  padding: 1rem 0 2rem;
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  color: var(--muted);
}

@media (max-width: 900px) {
  .hero__grid,
  .card-grid,
  .content-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 0.8rem 1rem;
  }

  .site-footer__inner,
  .cta {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}