/* ==========================================================================
   CLIFFEGO — BASE, LAYOUT, NAVIGATION, FOOTER, SHARED COMPONENTS
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  font: var(--text-body);
  color: var(--text-on-light);
  background: var(--surface-white);
  -webkit-font-smoothing: antialiased;
}

/* ---------- Accessibility: skip link + focus ---------- */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  background: var(--accent);
  color: var(--color-white);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-button);
  font: 600 0.9375rem/1 var(--font-base);
  transition: top var(--duration-fast) var(--ease-out);
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
}
.btn:focus-visible { outline-offset: 2px; }

h1, h2, h3, p, figure { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--spacing-container);
  padding-right: var(--spacing-container);
}

.section {
  padding-top: var(--spacing-section);
  padding-bottom: var(--spacing-section);
}
.section--dark { background: var(--surface-dark); color: var(--text-on-dark); }
.section--light { background: var(--surface-light); color: var(--text-on-light); }
.section--white { background: var(--surface-white); color: var(--text-on-light); }

.eyebrow {
  font: var(--text-eyebrow);
  color: var(--text-on-light-muted);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent);
  flex: none;
}
.section--dark .eyebrow, .page-hero .eyebrow { color: var(--text-on-dark-muted); }

h1.display, .display-text { font: var(--text-display); letter-spacing: -0.015em; }
h1, .h1 { font: var(--text-h1); letter-spacing: -0.01em; }
h2, .h2 { font: var(--text-h2); letter-spacing: -0.008em; }
h3, .h3 { font: var(--text-h3); }
.body-lg { font: 400 1.125rem/1.6 var(--font-base); }
.muted { color: var(--text-on-light-muted); }
.section--dark .muted { color: var(--text-on-dark-muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.75rem;
  border-radius: var(--radius-button);
  font: 600 0.9375rem/1 var(--font-base);
  transition: transform var(--duration-fast) var(--ease-out), background var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent);
  color: var(--color-white);
  border: 1px solid var(--accent);
}
.btn-primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--text-on-dark);
}
.section--dark .btn-secondary { border-color: var(--border-on-dark); color: var(--text-on-dark); }
.section--white .btn-secondary, .section--light .btn-secondary { color: var(--accent); border-color: var(--accent); }
.btn-secondary:hover { background: var(--text-on-dark);  color: var(--accent); }
.section--white .btn-secondary:hover, .section--light .btn-secondary:hover { background: var(--accent); color: var(--color-white); }
.btn-text {
  padding: 0;
  border-bottom: 1px solid currentColor;
  border-radius: 0;
  padding-bottom: 2px;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--surface-light); /* Default light background */
  border-bottom: 1px solid var(--border-on-light);
  transition: background var(--duration-base) var(--ease-out), border-color var(--duration-base) var(--ease-out), padding var(--duration-base) var(--ease-out);
}

.nav.is-scrolled {
  background: rgba(24, 24, 24, 0.92); /* Dark charcoal on scroll */
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-on-dark);
}

.nav__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 1.5rem var(--spacing-container);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: padding var(--duration-base) var(--ease-out);
}
.nav.is-scrolled .nav__inner { padding-top: 0.9rem; padding-bottom: 0.9rem; }

/* Enhanced Logo Styling */
.nav__logo {
  font: 700 1.25rem/1 var(--font-base);
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-on-light); /* Dark text on light nav */
  transition: color var(--duration-fast) var(--ease-out);
}
.nav.is-scrolled .nav__logo {
  color: var(--text-on-dark); /* Light text on dark scrolled nav */
}
.nav__logo:hover {
  color: var(--accent);
}
.nav__logo::before {
  content: "";
  width: 8px; 
  height: 8px;
  background: var(--accent);
  display: inline-block;
  transform: rotate(45deg);
  transition: transform var(--duration-fast) var(--ease-out);
}
.nav__logo:hover::before {
  transform: rotate(225deg);
}

/* Links */
.nav__links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}
.nav__links a {
  font: 500 0.9375rem/1 var(--font-base);
  position: relative;
  padding-bottom: 4px;
  color: var(--text-on-light); /* Dark text on light nav */
  transition: color var(--duration-fast) var(--ease-out);
}
.nav.is-scrolled .nav__links a {
  color: var(--text-on-dark); /* Light text on dark scrolled nav */
}
.nav__links a:hover,
.nav__links a.is-active,
.nav.is-scrolled .nav__links a:hover,
.nav.is-scrolled .nav__links a.is-active {
  color: var(--accent); /* Copper accent overrides both light and dark states */
  font-weight: 600;
}
.nav__links a.is-active::after,
.nav__links a:hover::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--accent);
}

.nav__right { display: flex; align-items: center; gap: 1.5rem; }
.nav__menu-btn { display: none; }

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__right .btn-primary { padding: 0.6rem 1.1rem; font-size: 0.85rem; }
  .nav__menu-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 24px;
    padding: 4px;
    color: var(--text-on-light); /* Hamburger icon dark on light nav */
  }
  .nav.is-scrolled .nav__menu-btn {
    color: var(--text-on-dark); /* Hamburger icon light on dark nav */
  }
  .nav__menu-btn span {
    height: 2px;
    background: currentColor;
    display: block;
    transition: transform var(--duration-base) var(--ease-out), opacity var(--duration-base) var(--ease-out);
  }
  .nav.menu-open .nav__menu-btn span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.menu-open .nav__menu-btn span:nth-child(2) { opacity: 0; }
  .nav.menu-open .nav__menu-btn span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  top: 0;
  background: var(--surface-light);
  z-index: 99;
  padding: 6.5rem var(--spacing-container-mobile) 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: translateY(-100%);
  transition: transform var(--duration-slow) var(--ease-out);
}
.mobile-menu.is-open { transform: translateY(0); }
.mobile-menu__links { display: flex; flex-direction: column; gap: 0.25rem; }
.mobile-menu__links a {
  font: 700 2rem/1.3 var(--font-base);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-on-light);
  color: var(--text-on-light);
}
.mobile-menu .btn-primary { width: 100%; justify-content: center; margin-top: 2rem; }

/* ---------- Footer ---------- */
.footer {
  background: var(--surface-dark);
  color: var(--text-on-dark);
  padding: var(--spacing-section) var(--spacing-container) 2.5rem;
}
.footer__top {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3.5rem;
  border-bottom: var(--text-on-dark);
}
.footer__brand .nav__logo {  color: var(--text-on-dark); font-size: 1.375rem; margin-bottom: 0.75rem; }
.footer__tagline { color: var(--text-on-dark); max-width: 26ch; }
.footer__col-title { font: var(--text-label); letter-spacing: var(--text-label-tracking); text-transform: uppercase; color: var(--text-on-dark); margin-bottom: 1rem; }
.footer__col ul { display: flex; flex-direction: column; gap: 0.65rem; }
.footer__col a:hover { color: var(--accent); }
.footer__bottom {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-top: 1.75rem;
  display: flex;
  justify-content: space-between;
  color: var(--text-on-dark);
  font: var(--text-small);
}
@media (max-width: 767px) {
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; gap: 0.5rem; }
}

/* ---------- Reveal-on-scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Utility ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.stack-sm { display: flex; flex-direction: column; gap: 0.75rem; }
.actions { display: flex; gap: 1rem; flex-wrap: wrap; }
@media (max-width: 767px) {
  .grid-2 { grid-template-columns: 1fr; gap: 2.5rem; }
}