/* --- Nav --- */
.site-nav {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
  padding-block: var(--space-sm);
  transition: background var(--duration-normal) var(--ease-out-expo),
              padding var(--duration-normal) var(--ease-out-expo),
              box-shadow var(--duration-normal) var(--ease-out-expo);
}

.site-nav.is-scrolled {
  background: oklch(94% 0.010 82 / 0.86);
  backdrop-filter: blur(14px) saturate(140%);
  padding-block: calc(var(--space-sm) * 0.65);
  box-shadow: 0 1px 0 var(--color-hairline-light), var(--shadow-soft);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
  object-position: 50% 38%;
  box-shadow: 0 0 0 1px var(--color-hairline-light);
}

.brand strong { color: var(--color-bronze); font-weight: 500; }

.nav-links {
  display: none;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.5rem);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
}

@media (min-width: 860px) {
  .nav-links { display: flex; }
}

.nav-links a {
  position: relative;
  padding-block: 0.3rem;
  color: var(--color-text-on-light-muted);
  transition: color var(--duration-fast) var(--ease-out-expo);
}
.nav-links a::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 1px;
  background: var(--color-bronze);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--color-ink); }
.nav-links a:hover::after, .nav-links a:focus-visible::after { transform: scaleX(1); }

.nav-cta {
  display: none;
}
@media (min-width: 860px) {
  .nav-cta { display: inline-flex; }
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}
@media (min-width: 860px) { .nav-toggle { display: none; } }
.nav-toggle span {
  width: 22px; height: 1.5px;
  background: var(--color-ink);
  transition: transform var(--duration-fast) var(--ease-out-expo), opacity var(--duration-fast);
}
.nav-toggle[aria-expanded='true'] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded='true'] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded='true'] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 480;
  background: var(--color-putty);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out-expo), transform var(--duration-normal) var(--ease-out-expo);
}
.mobile-menu.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
.mobile-menu a { color: var(--color-ink); }
.mobile-menu a:hover, .mobile-menu a:focus-visible { color: var(--color-bronze); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  padding: 0.9em 1.8em;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  letter-spacing: 0.03em;
  white-space: nowrap;
  transition: transform var(--duration-fast) var(--ease-out-expo),
              box-shadow var(--duration-fast) var(--ease-out-expo),
              background var(--duration-fast) var(--ease-out-expo),
              color var(--duration-fast) var(--ease-out-expo);
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--color-bronze-light), var(--color-bronze));
  color: var(--color-paper);
  box-shadow: 0 10px 30px -10px oklch(58% 0.035 70 / 0.55);
}
.btn-primary:hover, .btn-primary:focus-visible { box-shadow: 0 14px 36px -8px oklch(58% 0.035 70 / 0.7); transform: translateY(-2px); }

.btn-ghost-dark {
  border: 1px solid var(--color-hairline-light);
  color: var(--color-ink);
}
.btn-ghost-dark:hover, .btn-ghost-dark:focus-visible { border-color: var(--color-bronze); color: var(--color-bronze); }

.btn-ghost-light {
  border: 1px solid var(--color-hairline-dark);
  color: var(--color-text-on-dark);
}
.btn-ghost-light:hover, .btn-ghost-light:focus-visible { border-color: var(--color-bronze-light); color: var(--color-bronze-light); }

/* --- WhatsApp FAB --- */
.whatsapp-fab {
  position: fixed;
  inset-inline-end: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 400;
  display: flex;
  align-items: center;
  gap: 0.6em;
  background: #1f8a5e;
  color: #fff;
  padding: 0.85em 1.3em;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-soft);
  transition: transform var(--duration-fast) var(--ease-out-expo);
  font-size: var(--text-sm);
}
.whatsapp-fab:hover, .whatsapp-fab:focus-visible { transform: translateY(-3px) scale(1.03); }
.whatsapp-fab svg { width: 20px; height: 20px; flex-shrink: 0; }
.whatsapp-fab .fab-label { display: none; }
@media (min-width: 640px) { .whatsapp-fab .fab-label { display: inline; } }
@media (max-width: 639px) {
  .whatsapp-fab { display: none; }
}

/* --- Mobile bottom action bar (mobile-first priority) --- */
.mobile-action-bar {
  position: fixed;
  inset-inline: 0;
  bottom: 0;
  z-index: 450;
  display: flex;
  gap: 1px;
  background: var(--color-hairline-light);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  box-shadow: 0 -8px 30px -12px oklch(23% 0.014 60 / 0.35);
}
@media (min-width: 640px) { .mobile-action-bar { display: none; } }
.mobile-action-bar a {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding-block: 0.95em;
  font-size: var(--text-sm);
  font-weight: 600;
  background: var(--color-paper);
}
.mobile-action-bar a svg { width: 18px; height: 18px; }
.mobile-action-bar a.is-whatsapp { background: #1f8a5e; color: #fff; }
.mobile-action-bar a.is-call { color: var(--color-ink); }

/* --- Cards --- */
.card {
  background: var(--color-paper);
  border: 1px solid var(--color-hairline-light);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: transform var(--duration-normal) var(--ease-editorial),
              border-color var(--duration-normal) var(--ease-editorial),
              box-shadow var(--duration-normal) var(--ease-editorial);
}
.card:hover { transform: translateY(-6px); border-color: var(--color-bronze-light); box-shadow: var(--shadow-soft); }

section[data-theme='dark'] .card {
  background: var(--color-ink-soft);
  border-color: var(--color-hairline-dark);
}
section[data-theme='dark'] .card:hover { border-color: var(--color-bronze); }

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--duration-slow) var(--ease-editorial), transform var(--duration-slow) var(--ease-editorial);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: no-preference) {
  .stagger > * { transition-delay: calc(var(--i, 0) * 90ms); }
}