/* ==========================================================================
   site.css — shared styles for samlawson.co.uk
   Sits on top of colors_and_type.css (do not duplicate tokens)
   ========================================================================== */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--sl-bg);
  color: var(--sl-fg);
  font-family: var(--sl-font-body);
  font-size: var(--sl-fs-body);
  line-height: var(--sl-lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* ------------------------------------------------------------------
   Reusable layout primitives
   ------------------------------------------------------------------ */
.sl-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}
.sl-container--narrow { max-width: 880px; }
.sl-container--wide { max-width: 1440px; }

@media (max-width: 720px) {
  .sl-container { padding: 0 20px; }
}

/* ------------------------------------------------------------------
   Top navigation — shared across all pages
   ------------------------------------------------------------------ */
.sl-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 32px;
  display: flex; align-items: center; justify-content: space-between;
  transition: background 280ms ease, backdrop-filter 280ms ease, border-color 280ms ease;
  border-bottom: 1px solid transparent;
}
.sl-nav.is-scrolled {
  background: rgba(15, 14, 18, 0.78);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--sl-bone-08);
}
.sl-nav__logo {
  font-family: var(--sl-font-display);
  font-weight: 900; font-size: 18px;
  letter-spacing: -0.03em; line-height: 1; white-space: nowrap;
  color: var(--sl-bone);
  display: inline-flex; align-items: baseline;
}
.sl-nav__logo .b { color: var(--sl-brass); font-weight: 400; margin: 0 0.08em; }
.sl-nav__links {
  display: flex; gap: 36px; align-items: center;
}
.sl-nav__link {
  font-family: var(--sl-font-mono);
  font-size: 11px; font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--sl-bone-70);
  position: relative;
  padding: 6px 0;
  transition: color 180ms ease;
}
.sl-nav__link:hover { color: var(--sl-bone); }
.sl-nav__link.is-active { color: var(--sl-brass); }
.sl-nav__link.is-active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1px; background: var(--sl-brass);
}
.sl-nav__cta {
  font-family: var(--sl-font-mono);
  font-size: 11px; font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  padding: 10px 18px;
  color: var(--sl-dusk);
  background: var(--sl-brass);
  border: none;
  transition: transform 180ms ease, background 180ms ease;
}
.sl-nav__cta:hover { background: #d3a76b; transform: translateY(-1px); }

@media (max-width: 860px) {
  .sl-nav__links { display: none; }
  .sl-nav { padding: 14px 20px; }
}

/* ------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------ */
.sl-footer {
  background: var(--sl-bg-deep);
  border-top: 1px solid var(--sl-border-soft);
  padding: 80px 0 40px;
  margin-top: 120px;
}
.sl-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 64px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--sl-border-soft);
}
.sl-footer__col h4 {
  font-family: var(--sl-font-mono);
  font-size: 11px; font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--sl-fg-subtle);
  margin: 0 0 20px;
}
.sl-footer__col ul { list-style: none; padding: 0; margin: 0; }
.sl-footer__col li { margin-bottom: 10px; }
.sl-footer__col a {
  font-size: 14px; color: var(--sl-fg-muted);
  transition: color 180ms ease;
}
.sl-footer__col a:hover { color: var(--sl-brass); }
.sl-footer__brand p {
  font-size: 14px; color: var(--sl-fg-muted); margin-top: 16px; max-width: 320px;
}
.sl-footer__bottom {
  padding-top: 32px;
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--sl-font-mono);
  font-size: 10px; font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--sl-fg-faint);
}
@media (max-width: 720px) {
  .sl-footer__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .sl-footer__bottom { flex-direction: column; gap: 16px; text-align: center; }
}

/* ------------------------------------------------------------------
   Reveal-on-scroll utility (used by both v1 and v2)
   ------------------------------------------------------------------ */
.sl-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 800ms cubic-bezier(0.2, 0, 0.2, 1),
              transform 800ms cubic-bezier(0.2, 0, 0.2, 1);
}
.sl-reveal.is-visible {
  opacity: 1; transform: translateY(0);
}
.sl-reveal--lg { transform: translateY(40px); }
.sl-reveal--delay-1 { transition-delay: 100ms; }
.sl-reveal--delay-2 { transition-delay: 200ms; }
.sl-reveal--delay-3 { transition-delay: 300ms; }
.sl-reveal--delay-4 { transition-delay: 400ms; }

@media (prefers-reduced-motion: reduce) {
  .sl-reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------ */
.sl-btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 16px 28px;
  font-family: var(--sl-font-mono);
  font-size: 12px; font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  border: none;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}
.sl-btn--primary {
  background: var(--sl-brass);
  color: var(--sl-dusk);
}
.sl-btn--primary:hover { background: #d3a76b; transform: translateY(-2px); }
.sl-btn--ghost {
  background: transparent;
  color: var(--sl-bone);
  border: 1px solid var(--sl-bone-30);
}
.sl-btn--ghost:hover { border-color: var(--sl-brass); color: var(--sl-brass); }
.sl-btn__arrow {
  display: inline-block;
  transition: transform 180ms ease;
}
.sl-btn:hover .sl-btn__arrow { transform: translateX(4px); }

/* ------------------------------------------------------------------
   Section headers (eyebrow + headline pattern, used everywhere)
   ------------------------------------------------------------------ */
.sl-section-head {
  display: flex; flex-direction: column; gap: 16px;
  margin-bottom: 64px;
}
.sl-section-head__eyebrow {
  font-family: var(--sl-font-mono);
  font-size: 11px; font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--sl-brass);
  display: inline-flex; align-items: center; gap: 14px;
}
.sl-section-head__eyebrow::before {
  content: ''; width: 32px; height: 1px; background: var(--sl-brass);
}
.sl-section-head__title {
  font-family: var(--sl-font-display);
  font-weight: 900;
  font-size: clamp(36px, 5.5vw, 72px);
  letter-spacing: -0.035em;
  line-height: 0.98;
  margin: 0;
  text-wrap: balance;
}
.sl-section-head__title .brass { color: var(--sl-brass); }
.sl-section-head__lead {
  font-size: 19px;
  color: var(--sl-fg-muted);
  max-width: 580px;
  line-height: 1.55;
  margin: 8px 0 0;
}