/* AVA Golf — shared brand styles
   Forest dark + cream paper.
   Construct Mono → display, DM Mono → labels/data, Google Sans Flex → prose.
*/

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Google+Sans:wght@400;500;600;700&display=swap');

/* Construct Mono is a paid font; we use a robust mono fallback that holds the
   architectural feel: JetBrains Mono / IBM Plex Mono. */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* identity palette — from brand-system.md §3 */
  --color-paper: #F5F1E8;
  --color-paper-sunk: #EDE7D7;
  --color-paper-line: #D9D2BD;
  --color-forest: #0E3A2E;
  --color-forest-deep: #07140C;
  --color-forest-mid: #10211C;
  --color-forest-line: #1F4438;
  --color-jade: #3BA184;
  --color-jade-soft: #95CBC1;
  --color-yellow: #F4EC19;
  --color-amber: #F5B719;
  --color-signal-down: #D8452C;
  --color-ink: #0B1F18;
  --color-ink-muted: #4A5C54;
  --color-ink-faint: #8A9A92;
  --color-cream-on-forest: rgba(245, 241, 232, 0.86);
  --color-cream-on-forest-faint: rgba(245, 241, 232, 0.55);

  /* type families */
  --font-display: 'JetBrains Mono', 'Construct Mono', ui-monospace, monospace;
  --font-mono: 'DM Mono', ui-monospace, 'JetBrains Mono', monospace;
  --font-prose: 'Google Sans', 'Google Sans Flex', system-ui, -apple-system, sans-serif;

  /* type scale */
  --text-display-xl: clamp(56px, 7.6vw, 120px);
  --text-display-lg: clamp(40px, 5vw, 72px);
  --text-display-md: clamp(28px, 3.4vw, 48px);
  --text-headline: clamp(22px, 2.4vw, 32px);
  --text-body-lg: 19px;
  --text-body: 16px;
  --text-body-sm: 14px;
  --text-label: 11px;
  --text-label-sm: 10px;

  /* spacing */
  --gutter: clamp(24px, 4vw, 64px);
  --section: clamp(80px, 10vw, 160px);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-prose);
  font-size: var(--text-body);
  line-height: 1.5;
  color: var(--color-ink);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
ul, ol { list-style: none; padding: 0; margin: 0; }
input, select, textarea { font: inherit; color: inherit; }

::selection { background: var(--color-yellow); color: var(--color-forest-deep); }

/* ---------- type primitives ---------- */
.label {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
}
.label--sm { font-size: var(--text-label-sm); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.display {
  font-family: var(--font-display);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  line-height: 0.92;
}
.prose { font-family: var(--font-prose); }
.tnum { font-variant-numeric: tabular-nums; }

/* ---------- shell ---------- */
.shell {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.rule {
  height: 1px;
  background: var(--color-paper-line);
  width: 100%;
}
.rule--forest { background: var(--color-forest-line); }

/* ---------- nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  height: 72px;
  display: flex;
  align-items: center;
  transition: background 240ms ease, border-color 240ms ease, color 240ms ease;
}
.nav__inner {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
}
.nav--dark {
  color: var(--color-cream-on-forest);
  background: linear-gradient(to bottom, rgba(7,14,12,0.65) 0%, rgba(7,14,12,0) 100%);
}
.nav--scrolled {
  background: rgba(245, 241, 232, 0.92);
  color: var(--color-ink);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-paper-line);
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
}
.nav__logo-icon {
  height: 28px;
  width: auto;
  display: block;
}
.nav__logo-wm {
  height: 18px;
  width: auto;
  display: block;
}
.nav--dark .nav__logo-wm { filter: brightness(0) invert(1); }
.nav--scrolled .nav__logo-wm { filter: none; }
.nav__links {
  display: flex;
  gap: 36px;
  justify-self: center;
}
.nav__link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.85;
  transition: opacity 120ms linear;
}
.nav__link:hover { opacity: 1; }
.nav__link--active { opacity: 1; position: relative; }
.nav__link--active::after {
  content: '';
  position: absolute;
  left: 50%; top: calc(100% + 8px);
  transform: translateX(-50%);
  width: 16px; height: 2px;
  background: var(--color-yellow);
  border-radius: 2px;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  transition: transform 120ms linear, background 120ms linear, color 120ms linear, border-color 120ms linear;
  border: 1px solid transparent;
  white-space: nowrap;
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--color-yellow);
  color: var(--color-forest-deep);
}
.btn--primary:hover { background: #FFF44A; }
.btn--ghost-light {
  border-color: rgba(245,241,232,0.35);
  color: var(--color-cream-on-forest);
}
.btn--ghost-light:hover { border-color: var(--color-cream-on-forest); }
.btn--ghost-dark {
  border-color: var(--color-paper-line);
  color: var(--color-ink);
}
.btn--ghost-dark:hover { border-color: var(--color-ink); }
.btn--forest {
  background: var(--color-forest);
  color: var(--color-paper);
}
.btn--forest:hover { background: #134738; }
.btn__arrow {
  display: inline-block;
  transition: transform 160ms ease-out;
}
.btn:hover .btn__arrow { transform: translateX(3px); }

/* ---------- forest hero panel ---------- */
.forest {
  background: var(--color-forest-deep);
  color: var(--color-cream-on-forest);
  position: relative;
  overflow: hidden;
}
.forest__noise {
  position: absolute;
  inset: 0;
  background-image: url('assets/noise-green.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.55;
  mix-blend-mode: multiply;
  pointer-events: none;
}
.forest__contour {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.10;
}

/* ---------- footer ---------- */
.footer {
  background: var(--color-forest-deep);
  color: var(--color-cream-on-forest);
  padding: 80px 0 48px;
  position: relative;
  overflow: hidden;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.footer__brand-icon { height: 36px; width: auto; display: block; }
.footer__brand-wm { height: 22px; width: auto; display: block; filter: brightness(0) invert(1); }
.footer__col-title {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-jade-soft);
  margin-bottom: 20px;
}
.footer__link {
  display: block;
  padding: 6px 0;
  font-size: 13px;
  color: var(--color-cream-on-forest);
  transition: color 120ms linear;
}
.footer__link:hover { color: var(--color-yellow); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--color-forest-line);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-cream-on-forest-faint);
}

/* ---------- shared section header ---------- */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--color-jade);
  margin-bottom: 20px;
}
.section-eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: currentColor;
}
.forest .section-eyebrow { color: var(--color-jade-soft); }

.section-title {
  font-family: var(--font-display);
  font-weight: 500;
  text-transform: uppercase;
  font-size: var(--text-display-md);
  line-height: 0.96;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  max-width: 16ch;
}
.section-lede {
  font-family: var(--font-prose);
  font-size: 19px;
  line-height: 1.45;
  color: var(--color-ink-muted);
  max-width: 56ch;
  margin: 0;
  text-wrap: pretty;
}
.forest .section-lede { color: var(--color-cream-on-forest); }

/* ---------- a11y ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}
:focus-visible { outline: 2px solid var(--color-jade); outline-offset: 3px; border-radius: 4px; }