/* ─── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.85em 2.2em;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition:
    background var(--duration-mid) var(--ease-out),
    color var(--duration-mid) var(--ease-out),
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-mid) var(--ease-out);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.06);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.btn:hover::after { opacity: 1; }
.btn:active { transform: translateY(1px); }

/* Primary — dark on light */
.btn--primary {
  background: var(--color-primary);
  color: var(--color-bg);
  border-radius: var(--radius-sm);
}

.btn--primary:hover {
  background: #2e2a28;
  box-shadow: 0 8px 32px rgba(28, 26, 25, 0.18);
  transform: translateY(-1px);
}

/* Accent — gold */
.btn--accent {
  background: var(--color-accent);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
}

.btn--accent:hover {
  background: #b8905f;
  box-shadow: 0 8px 32px rgba(201, 162, 126, 0.35);
  transform: translateY(-1px);
}

/* Ghost — outline on light */
.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.btn--ghost:hover {
  background: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

/* Ghost on dark */
.btn--ghost-light {
  background: transparent;
  color: var(--color-bg);
  border: 1px solid rgba(247, 244, 241, 0.25);
  border-radius: var(--radius-sm);
}

.btn--ghost-light:hover {
  background: var(--color-bg);
  color: var(--color-primary);
  border-color: var(--color-bg);
  transform: translateY(-1px);
}

/* ─── Navigation ──────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition:
    background var(--duration-mid) var(--ease-out),
    border-color var(--duration-mid) var(--ease-out),
    box-shadow var(--duration-mid) var(--ease-out);
}

/* Default: transparent over dark hero — everything is light */
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  padding: 0 var(--space-8);
  max-width: var(--container-wide);
  margin: 0 auto;
}

/* Logo: invert to white when over dark hero */
.nav__logo img {
  height: 36px;
  width: auto;
  transition:
    opacity var(--duration-fast),
    filter var(--duration-mid) var(--ease-out);
  filter: brightness(0) invert(1); /* white logo over dark hero */
}

.nav__logo:hover img { opacity: 0.75; }

/* Once scrolled, logo returns to its natural dark colour */
.nav.scrolled .nav__logo img {
  filter: none;
}

.nav.scrolled {
  background: rgba(247, 244, 241, 0.97);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 4px 32px rgba(28, 26, 25, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-10);
}

.nav__link {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.08em;
  /* Default: white over dark hero */
  color: rgba(247, 244, 241, 0.88);
  text-transform: uppercase;
  position: relative;
  padding: var(--space-1) 0;
  transition: color var(--duration-mid) var(--ease-out);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--duration-mid) var(--ease-out);
}

.nav__link:hover { color: var(--color-accent); }
.nav__link:hover::after { width: 100%; }
.nav__link.active { color: var(--color-accent); }
.nav__link.active::after { width: 100%; }

/* Once scrolled: links become dark */
.nav.scrolled .nav__link {
  color: var(--color-primary);
}

.nav__cta {
  margin-left: var(--space-6);
}

/* Hamburger: white over hero, dark once scrolled */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: rgba(247, 244, 241, 0.9); /* white over hero */
  transition:
    transform var(--duration-mid) var(--ease-out),
    opacity var(--duration-mid) var(--ease-out),
    background var(--duration-mid) var(--ease-out);
  transform-origin: center;
}

.nav.scrolled .nav__hamburger span {
  background: var(--color-primary);
}

/* Mobile nav */
.nav__mobile {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 99;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-20px);
  transition:
    opacity var(--duration-mid) var(--ease-out),
    transform var(--duration-mid) var(--ease-out);
}

.nav__mobile.open {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.nav__mobile-link {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  transition: color var(--duration-fast);
}

.nav__mobile-link:hover { color: var(--color-accent); }

/* ─── Image Containers ────────────────────────────────── */
.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}

.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-xslow) var(--ease-out);
}

.img-frame:hover img {
  transform: scale(1.04);
}

/* ─── Cards ───────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-10);
  transition:
    transform var(--duration-mid) var(--ease-out),
    box-shadow var(--duration-mid) var(--ease-out),
    border-color var(--duration-mid) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(28, 26, 25, 0.08);
  border-color: var(--color-accent-soft);
}

.card--dark {
  background: var(--color-dark-surface);
  border-color: var(--color-dark-border);
}

.card--dark:hover {
  border-color: var(--color-accent);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px rgba(201, 162, 126, 0.06);
}

/* ─── Dividers ─────────────────────────────────────────── */
.divider {
  width: 40px;
  height: 1px;
  background: var(--color-accent);
  margin: var(--space-6) 0;
}

.divider--center {
  margin-left: auto;
  margin-right: auto;
}

/* ─── Mobile nav responsive ──────────────────────────── */
@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
}

@media (max-width: 768px) {
  .nav__inner { padding: 0 var(--space-6); }
}