/* Greybox Phase 2 — cinematic dynamic hero (+ Phase 3 seamless trailer).
 * Consumes Phase 1 tokens (black / glass / amber). No red primary, no neon.
 * Backdrop: slow Ken Burns (100% → 106% + subtle drift). The trailer iframe
 * buffers invisibly (visibility:hidden layer) and crossfades above the still
 * only after the YouTube player confirms actual playback. Mute/unmute keeps
 * its existing styling. Respects prefers-reduced-motion. */

.gx-hero {
  position: relative;
  height: 78vh;
  min-height: 560px;
  max-height: 860px;
  overflow: hidden;
  background: var(--gx-bg-0);
  isolation: isolate;
}

/* Reserve full space before art loads: dark placeholder, never a broken icon */
.gx-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(70% 50% at 50% 20%, rgba(208, 162, 79, 0.05), transparent 70%),
    linear-gradient(to bottom, #0a0a11, var(--gx-bg-0));
}

.gx-hero-ambient,
.gx-hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* Subtle artwork-derived atmosphere. Static blur — no canvas, no realtime cost. */
.gx-hero-ambient {
  object-fit: cover;
  object-position: center 20%;
  filter: blur(70px) saturate(1.15);
  opacity: 0;
  transform: scale(1.12);
  transition: opacity 900ms ease;
}

.gx-hero-img {
  object-fit: cover;
  object-position: center 20%;
  opacity: 0;
  transition: opacity 900ms ease;
  /* Ken Burns runs only once shown (see .is-ready) */
}

.gx-hero.is-ready .gx-hero-ambient { opacity: 0.26; }
.gx-hero.is-ready .gx-hero-img { opacity: 1; }

.gx-hero.is-ready .gx-hero-img {
  animation: gx-kenburns 24s ease-out forwards;
}

@keyframes gx-kenburns {
  from { transform: scale(1) translate(0, 0); }
  to { transform: scale(1.06) translate(-0.6%, 0.6%); }
}

/* Layered cinematic shading: readable text, deep vignette, navbar-safe top */
.gx-hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to top, var(--gx-bg-0) 3%, rgba(7, 7, 12, 0.84) 26%, rgba(7, 7, 12, 0.38) 55%, rgba(7, 7, 12, 0.08) 78%, transparent 100%),
    linear-gradient(to right, rgba(7, 7, 12, 0.55) 0%, transparent 45%),
    linear-gradient(to bottom, rgba(7, 7, 12, 0.55) 0%, transparent 20%);
}

.gx-hero-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 95% at 50% 42%, transparent 52%, rgba(0, 0, 0, 0.6) 100%);
}

/* Trailer sits between still and shade: crossfade, fills hero, no controls */
.gx-hero-trailer {
  position: absolute;
  inset: 0;
  overflow: hidden;
  opacity: 0;
  transition: opacity 1200ms ease;
}

.gx-hero-trailer.is-visible { opacity: 1; }
.gx-hero-trailer.hidden { display: none; }

/* Buffering layer: in layout (so the iframe loads) but paints nothing.
 * This is what makes the trailer Window-safe while it gets ready — no
 * YouTube chrome, spinner, or error surface can flash through. */
.gx-hero-trailer.is-buffering { visibility: hidden; }

.gx-hero-trailer iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  width: max(100%, 177.78vh);
  height: max(100%, 56.25vw);
  border: 0;
  transform: translate(-50%, -50%);
  pointer-events: none; /* our own mute control; no giant YouTube bar */
}

/* Content */
.gx-hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--gx-max);
  margin: 0 auto;
  padding: 0 16px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: 56px;
  min-width: 0;
}

.gx-hero-kicker {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gx-text-dim);
  margin-bottom: 10px;
}

.gx-hero-kicker:empty { display: none; }

.gx-hero-title {
  font-size: clamp(2rem, 5vw, 3.75rem);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--gx-text);
  max-width: 16ch;
  text-wrap: balance;
}

.gx-hero-meta {
  margin-top: 10px;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--gx-text-dim);
}

.gx-hero-meta:empty { display: none; }

.gx-hero-meta .gx-star { color: var(--gx-accent-strong); }

.gx-hero-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.gx-btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: var(--gx-radius-pill);
  font-size: 14px;
  font-weight: 700;
  padding: 12px 26px;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--gx-transition), border-color var(--gx-transition), transform var(--gx-transition);
}

.gx-btn:active { transform: translateY(1px); }

.gx-btn-primary {
  background: var(--gx-text);
  color: #0b0b10;
}

.gx-btn-primary:hover { background: #fff; }

.gx-btn-glass {
  background: rgba(255, 255, 255, 0.09);
  border-color: var(--gx-border-strong);
  color: var(--gx-text);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.gx-btn-glass:hover { background: rgba(255, 255, 255, 0.15); }

.gx-btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--gx-text-dim);
  font-weight: 600;
  padding: 12px 14px;
}

.gx-btn-ghost:hover { color: var(--gx-text); }
.gx-btn-ghost.is-in-list { color: var(--gx-accent-strong); }

/* Trailer control: one small circular glass button in the actions row.
 * Countdown ring while waiting → speaker icon while playing. Same component,
 * same position — never two controls at once. */
.gx-trailer-btn {
  position: relative;
  flex: none;
  width: 42px;
  height: 42px;
  align-self: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: var(--gx-text);
  background: rgba(10, 10, 15, 0.55);
  border: 1px solid var(--gx-border-strong);
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--gx-transition), border-color var(--gx-transition);
}

.gx-trailer-btn:hover {
  background: rgba(255, 255, 255, 0.13);
  border-color: var(--gx-accent-border);
}

.gx-trailer-btn:focus-visible {
  outline: 2px solid var(--gx-accent);
  outline-offset: 2px;
}

.gx-trailer-btn.hidden { display: none; }

/* State visibility: icons only while playing (button hidden otherwise) */
.gx-trailer-btn .gx-icon {
  width: 18px;
  height: 18px;
}

.gx-trailer-btn.is-muted .gx-icon-unmuted { display: none; }
.gx-trailer-btn.is-unmuted .gx-icon-muted { display: none; }
.gx-trailer-btn.is-muted .gx-icon-muted,
.gx-trailer-btn.is-unmuted .gx-icon-unmuted { display: block; }

/* Loading state keeps structure, dark placeholder, no layout jump */
.gx-hero.hero-loading .gx-hero-img,
.gx-hero.hero-loading .gx-hero-ambient { opacity: 0; }

.hero-spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  border-radius: 9999px;
  border: 3px solid rgba(255, 255, 255, 0.25);
  border-top-color: var(--gx-accent);
  animation: gx-spin 0.8s linear infinite;
  vertical-align: -0.15em;
  margin-right: 0.5rem;
}

@keyframes gx-spin { to { transform: rotate(360deg); } }

/* Mobile composition (not a shrunk desktop) */
@media (max-width: 640px) {
  .gx-hero {
    height: 82vh;
    min-height: 520px;
  }

  .gx-hero-img { object-position: center 15%; }

  .gx-hero-content { padding-bottom: 40px; }

  .gx-btn { padding: 11px 20px; font-size: 13.5px; }
  .gx-btn-ghost { padding: 11px 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .gx-hero.is-ready .gx-hero-img { animation: none; }
  .gx-hero-ambient,
  .gx-hero-img,
  .gx-hero-trailer { transition: none; }
  .gx-btn:active { transform: none; }
}