/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.375rem;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
  will-change: transform;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--accent-primary);
  color: var(--accent-on-dark);
  box-shadow: var(--glow-accent);
}
.btn--primary:hover {
  background: var(--accent-primary-hover);
  color: var(--accent-on-dark);
  box-shadow: 0 0 0 1px rgba(var(--accent-rgb), 0.3), 0 14px 34px -10px rgba(var(--accent-rgb), 0.45);
}
.btn--primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 0 1px rgba(var(--accent-rgb), 0.4), 0 0 24px rgba(var(--accent-rgb), 0.55);
}

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.btn--ghost:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
}

.btn--link {
  padding: 0;
  background: transparent;
  color: var(--text-primary);
  border-radius: 0;
}
.btn--link:hover { color: var(--accent-primary); transform: none; }
.btn--link .btn__arrow { transition: transform var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out); }
.btn--link:hover .btn__arrow { transform: translateX(4px); color: var(--accent-primary); }

.btn__arrow {
  display: inline-block;
  font-size: 1.1em;
  line-height: 1;
}

/* ---------- Navigation ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(10, 10, 15, 0.72);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}
.site-nav.is-scrolled {
  border-bottom-color: var(--border);
  background: rgba(10, 10, 15, 0.88);
}
.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 72px;
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
}
.wordmark { transition: color var(--dur-fast) var(--ease-out); }
.wordmark:hover { color: var(--text-primary); }
.wordmark-period { transition: text-shadow var(--dur-base) var(--ease-out); }
.wordmark:hover .wordmark-period { text-shadow: 0 0 14px rgba(var(--accent-rgb), 0.6); }

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}
.site-nav__link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding-block: var(--space-2);
  transition: color var(--dur-fast) var(--ease-out);
}
.site-nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--accent-primary);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-base) var(--ease-out);
}
.site-nav__link:hover { color: var(--text-primary); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link.is-active { color: var(--text-primary); }
.site-nav__link.is-active::after { transform: scaleX(1); }

.site-nav__cta { display: inline-flex; }

/* Mobile nav */
.site-nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out);
}
.site-nav__toggle:hover { border-color: var(--text-secondary); }
.site-nav__toggle-bars {
  position: relative;
  width: 18px;
  height: 2px;
  background: currentColor;
  display: block;
}
.site-nav__toggle-bars::before,
.site-nav__toggle-bars::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur-base) var(--ease-out), top var(--dur-base) var(--ease-out), bottom var(--dur-base) var(--ease-out);
}
.site-nav__toggle-bars::before { top: -6px; }
.site-nav__toggle-bars::after { bottom: -6px; }

.site-nav[data-open='true'] .site-nav__toggle-bars { background: transparent; }
.site-nav[data-open='true'] .site-nav__toggle-bars::before { top: 0; transform: rotate(45deg); }
.site-nav[data-open='true'] .site-nav__toggle-bars::after { bottom: 0; transform: rotate(-45deg); }

@media (max-width: 860px) {
  .site-nav__toggle { display: inline-flex; }
  .site-nav__links {
    position: fixed;
    inset: 72px 0 0 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-6) var(--gutter);
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
  }
  .site-nav[data-open='true'] .site-nav__links {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .site-nav__link {
    font-size: var(--fs-xl);
    font-family: var(--font-display);
    font-weight: 500;
    color: var(--text-primary);
    padding-block: var(--space-4);
    border-bottom: 1px solid var(--border);
  }
  .site-nav__link.is-active::after { display: none; }
  .site-nav__link.is-active { color: var(--text-primary); }
  .site-nav__cta-item { margin-top: var(--space-5); border-bottom: 0; }
  .site-nav__cta { width: 100%; justify-content: center; }
  .site-nav__cta-desktop { display: none; }
}

@media (min-width: 861px) {
  .site-nav__cta-item { display: none; }
}

/* ---------- Cards / Surfaces ---------- */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding-block: var(--space-10) var(--space-6);
  background: linear-gradient(180deg, transparent, rgba(20, 20, 31, 0.6));
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-9);
}
@media (max-width: 760px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-7);
  }
}

.site-footer__brand .wordmark { font-size: 1.375rem; }
.site-footer__tagline {
  margin-top: var(--space-3);
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  max-width: 36ch;
}

.site-footer__heading {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}
.site-footer__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.site-footer__list a {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}
.site-footer__list a:hover { color: var(--text-primary); }

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: var(--tracking-wide);
}
.site-footer__bottom a { color: var(--text-muted); }
.site-footer__bottom a:hover { color: var(--text-secondary); }

@media (max-width: 560px) {
  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Scroll animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-delay='1'] { transition-delay: 80ms; }
.reveal[data-delay='2'] { transition-delay: 160ms; }
.reveal[data-delay='3'] { transition-delay: 240ms; }
.reveal[data-delay='4'] { transition-delay: 320ms; }

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

/* ---------- W-Aurora accent signals ---------- */
.wordmark-period { color: var(--accent-primary); }

/* Hero headline period — used only on the home hero per W-Aurora restraint */
.accent-period { color: var(--accent-primary); }

/* ---------- Pull-quote — used sparingly (one per page max) ---------- */
.pull-quote {
  border-left: 3px solid var(--accent-primary);
  padding-left: var(--space-5);
  margin: var(--space-7) 0;
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  font-weight: 500;
  line-height: var(--lh-snug);
  letter-spacing: -0.01em;
  color: var(--text-primary);
  font-style: normal;
  max-width: 60ch;
}