/* ==========================================================================
   RenderFrost SMP — 08 Hero (layered depth) + atmosphere
   ========================================================================== */

.hero {
  position: relative;
  min-height: min(100svh, 900px);
  display: flex;
  align-items: flex-end;
  padding-top: calc(var(--nav-h) + clamp(3rem, 8vh, 6rem));
  padding-bottom: clamp(3rem, 7vh, 5.5rem);
  overflow: hidden;
  isolation: isolate;
}

/* Layer 1: authentic supplied artwork. */
.hero__art {
  position: absolute;
  inset: 0;
  z-index: -3;
}

.hero__art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  transform: scale(var(--hero-scale, 1)) translate3d(var(--hero-x, 0px), var(--hero-y, 0px), 0);
  transform-origin: center 42%;
  will-change: transform;
}

/* Layer 2: atmosphere — vignette + frost haze so text always has contrast. */
.hero__atmos {
  position: absolute;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(75% 55% at 50% 42%, transparent 30%, rgba(6, 5, 12, 0.55) 100%),
    linear-gradient(180deg, rgba(6, 5, 12, 0.58) 0%, rgba(6, 5, 12, 0.12) 30%,
      rgba(6, 5, 12, 0.48) 56%, rgba(6, 5, 12, 0.88) 80%, var(--bg-0) 100%),
    linear-gradient(90deg, rgba(6, 5, 12, 0.55) 0%, transparent 42%);
}

/* Layer 3: particle canvas. */
.hero__particles {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.ambient-particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  max-width: none;
  opacity: 0.48;
  mix-blend-mode: screen;
}

.hero__inner {
  position: relative;
  width: 100%;
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.section#world {
  padding-top: clamp(2.5rem, 5vw, 4rem);
  background: linear-gradient(180deg, rgba(6, 5, 12, 0.2), transparent 70%);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--frost-100);
  text-shadow: 0 2px 40px rgba(6, 5, 12, 0.65);
}

.hero__title em {
  display: block;
  font-style: normal;
  font-size: 0.42em;
  letter-spacing: 0.34em;
  font-weight: 500;
  color: var(--violet-300);
  margin-bottom: 0.85em;
  text-transform: uppercase;
  font-family: var(--font-sans);
}

.hero__title strong {
  display: block;
  font-weight: 700;
  background: linear-gradient(180deg, #ffffff 8%, #e8e4ff 58%, #b8addc 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--frost-100);
}

.hero__sub {
  max-width: 46ch;
  font-size: var(--fs-lead);
  line-height: 1.6;
  color: var(--frost-200);
  font-weight: 350;
  margin: 0;
  text-shadow: 0 1px 20px rgba(6, 5, 12, 0.8);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--frost-400);
}

.hero__meta li { display: flex; align-items: center; gap: 0.55rem; }

.hero__meta li::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--violet-400);
}

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  z-index: 1;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-faint);
  text-decoration: none;
}

.hero__scroll i {
  display: block;
  width: 1px;
  height: 34px;
  background: linear-gradient(180deg, var(--violet-400), transparent);
  animation: scrollHint 2600ms var(--ease) infinite;
  transform-origin: top;
}

@keyframes scrollHint {
  0% { transform: scaleY(0.25); opacity: 0.3; }
  45% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(0.25); opacity: 0.3; }
}

/* Page entrance — grouped, short, never blocking. */
.hero__inner > * {
  animation: heroIn 900ms var(--ease-out) both;
}

.hero__inner > *:nth-child(1) { animation-delay: 60ms; }
.hero__inner > *:nth-child(2) { animation-delay: 160ms; }
.hero__inner > *:nth-child(3) { animation-delay: 260ms; }
.hero__inner > *:nth-child(4) { animation-delay: 360ms; }

@keyframes heroIn {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: none; }
}