/* Loader */
.loader {
  position: fixed;
  inset: 0;
  z-index: var(--z-loader);
  background: var(--plaster);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s var(--ease), visibility 0.6s;
}

.loader.is-done { opacity: 0; visibility: hidden; pointer-events: none; }

.loader__mark {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--ink);
  animation: pulse 1.2s ease infinite alternate;
}

@keyframes pulse {
  from { opacity: 0.4; }
  to { opacity: 1; }
}

/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  height: var(--header-h);
  transition: background var(--dur) var(--ease), color var(--dur);
}

.site-header.on-light {
  background: rgba(242, 240, 235, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.site-header.on-light .site-header__link { color: var(--ink-soft); }
.site-header.on-light .site-header__link:hover { color: var(--ink); }
.site-header.on-light .menu-btn span { background: var(--ink); }

.site-header__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.site-header__logo img {
  height: 28px;
  transition: filter var(--dur);
}

.site-header.on-hero .site-header__logo img {
  filter: brightness(0) invert(1);
}

.site-header__word {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--plaster);
  transition: color var(--dur);
}

.site-header.on-light .site-header__word { color: var(--ink); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.site-nav__links {
  display: flex;
  gap: 2rem;
}

.site-header__link {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(242, 240, 235, 0.7);
  transition: color var(--dur);
  cursor: pointer;
}

.site-header__link:hover,
.site-header__link.is-active { color: var(--plaster); }

.site-header.on-light .site-header__link.is-active { color: var(--accent); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.85rem 1.5rem;
  transition: all var(--dur) var(--ease);
  cursor: pointer;
}

.btn--fill {
  background: var(--ink);
  color: var(--plaster);
}

.btn--fill:hover { background: var(--accent); }

.btn--line {
  color: var(--plaster);
  border: 1px solid rgba(242, 240, 235, 0.35);
}

.btn--line:hover {
  border-color: var(--plaster);
  background: rgba(242, 240, 235, 0.08);
}

.btn--ink {
  background: var(--ink);
  color: var(--plaster);
}

.btn--ink:hover { background: var(--accent); }

.menu-btn {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.menu-btn span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--plaster);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), background var(--dur);
}

.site-header.is-menu-open .menu-btn span {
  background: var(--ink);
}

.site-header.is-menu-open .menu-btn span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.site-header.is-menu-open .menu-btn span:nth-child(2) {
  opacity: 0;
}

.site-header.is-menu-open .menu-btn span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

.site-header.is-menu-open .site-header__word {
  color: var(--ink);
}

.site-header.is-menu-open.on-hero .site-header__logo img {
  filter: none;
}

.drawer {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) - 1);
  background: var(--plaster);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem;
  padding-top: calc(var(--header-h) + 1rem);
  gap: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.drawer.is-open { opacity: 1; visibility: visible; }

.drawer__link {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
}

.wa-btn {
  position: fixed;
  bottom: 1.5rem; right: 1.5rem;
  z-index: var(--z-nav);
  width: 48px; height: 48px;
  border-radius: 50%;
  background: #1da851;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  transition: transform var(--dur) var(--ease);
  cursor: pointer;
}

.wa-btn:hover { transform: scale(1.05); }
.wa-btn svg { width: 24px; height: 24px; fill: white; }

@media (max-width: 900px) {
  .site-nav__links, .site-nav .btn--fill { display: none; }
  .menu-btn { display: flex; }
}