/* =============================================================================
   Depth Kit 2026 — 3D объём, слои, hover-flyout (same-origin)
   ============================================================================= */

:root {
  --depth-1: 0 1px 2px rgba(11, 28, 44, 0.06);
  --depth-2: 0 8px 24px rgba(11, 28, 44, 0.10), 0 2px 6px rgba(11, 28, 44, 0.06);
  --depth-3: 0 18px 48px rgba(11, 28, 44, 0.16), 0 4px 12px rgba(11, 28, 44, 0.08);
  --depth-brass: 0 12px 32px rgba(196, 163, 90, 0.22);
  --perspective: 1200px;
}

.depth-card,
.depth-panel {
  transform-style: preserve-3d;
  transition: transform 0.45s var(--ease-out, cubic-bezier(0.22, 1, 0.36, 1)),
    box-shadow 0.45s var(--ease-out, cubic-bezier(0.22, 1, 0.36, 1));
  box-shadow: var(--depth-1);
  will-change: transform;
}

@media (hover: hover) and (pointer: fine) {
  .depth-card:hover,
  .depth-panel:hover {
    transform: translateY(-4px) rotateX(2deg) rotateY(-2deg) scale(1.01);
    box-shadow: var(--depth-3);
  }

  .card-link.depth-card:hover {
    box-shadow: var(--depth-3), var(--depth-brass);
  }
}

.hero--depth {
  perspective: var(--perspective);
  isolation: isolate;
}

.hero--depth .hero__content {
  position: relative;
  z-index: 2;
  transform: translateZ(40px);
}

.hero__mesh {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 70% 40%, rgba(196, 163, 90, 0.18), transparent 60%),
    radial-gradient(ellipse 40% 35% at 20% 70%, rgba(11, 28, 44, 0.35), transparent 55%);
  mix-blend-mode: soft-light;
  animation: meshFloat 14s ease-in-out infinite alternate;
}

@keyframes meshFloat {
  from { transform: translate3d(0, 0, 0) scale(1); opacity: 0.85; }
  to { transform: translate3d(-2%, 3%, 0) scale(1.05); opacity: 1; }
}

/* Mega / flyout menus — обратный отклик при наведении */
.nav--mega {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav__item {
  position: relative;
}

.nav__item > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.4rem 0.75rem;
  text-decoration: none;
  border-radius: 2px;
  transition: color 0.25s var(--ease-out, ease), background 0.25s ease;
}

.nav__flyout {
  position: absolute;
  top: calc(100% - 4px);
  left: 0;
  min-width: 14rem;
  padding: 0.5rem;
  background: var(--paper-bright, #FBF9F5);
  border: 1px solid var(--line, rgba(11, 28, 44, 0.12));
  box-shadow: var(--depth-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px) rotateX(-8deg);
  transform-origin: top center;
  transition: opacity 0.28s var(--ease-out, ease),
    transform 0.28s var(--ease-out, ease),
    visibility 0.28s;
  z-index: 80;
}

.nav__flyout a {
  display: block;
  padding: 0.65rem 0.85rem;
  min-height: 44px;
  text-decoration: none;
  color: var(--text, #1A2430);
  border-radius: 2px;
  transition: background 0.2s ease, transform 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
  .nav__item.has-flyout:hover > a,
  .nav__item.has-flyout:focus-within > a {
    color: var(--brass-dim, #9A7E3F);
    background: rgba(196, 163, 90, 0.12);
  }

  .nav__item.has-flyout:hover .nav__flyout,
  .nav__item.has-flyout:focus-within .nav__flyout {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) rotateX(0);
  }

  .nav__flyout a:hover {
    background: rgba(11, 28, 44, 0.06);
    transform: translateX(3px);
  }
}

.steps-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
}

.steps-rail li {
  padding: 1.25rem 1.35rem;
  background: var(--paper-bright, #FBF9F5);
  border: 1px solid var(--line, rgba(11, 28, 44, 0.1));
  border-left: 3px solid var(--brass, #C4A35A);
}

.steps-rail strong {
  display: block;
  font-family: var(--font-display, Cinzel, serif);
  margin-bottom: 0.35rem;
  font-size: 1.05rem;
}

.steps-rail span {
  color: var(--text-muted, #5A6570);
  font-size: 0.95rem;
}

.section--mist {
  background: linear-gradient(180deg, var(--mist, #E8ECF0), var(--paper, #F7F3EB));
}

/* Press feedback */
.btn:active,
.header-cta:active {
  transform: scale(0.98);
}

@media (prefers-reduced-motion: reduce) {
  .hero__mesh { animation: none; }
  .depth-card,
  .depth-panel,
  .nav__flyout {
    transition: none;
    transform: none !important;
  }
}