:root {
  --bg: #05030b;
  --bg2: #10051b;

  --purple: #8b35ff;
  --purple2: #4b168f;
  --violet: #c342ff;

  --gold1: #fff2a3;
  --gold2: #ffd23c;
  --gold3: #d99700;
  --gold4: #8f5b00;

  --textDark: #180d00;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

.page {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 18px 0;
  background:
    radial-gradient(900px 700px at 18% 10%, rgba(139, 53, 255, .16), transparent 55%),
    radial-gradient(900px 700px at 82% 24%, rgba(255, 210, 60, .10), transparent 55%),
    radial-gradient(900px 700px at 50% 90%, rgba(195, 66, 255, .12), transparent 60%),
    linear-gradient(180deg, var(--bg), var(--bg2));
}

.posterWrap {
  width: min(560px, 100vw);
  border-radius: 18px;
  overflow: hidden;
  background: #000;
  box-shadow:
    0 30px 120px rgba(0, 0, 0, .68),
    0 0 44px rgba(139, 53, 255, .12);
  position: relative;

  /* กันปุ่ม fixed ทับเนื้อหาล่าง */
  padding-bottom: 124px;
}

.posterImg {
  display: block;
  width: 100%;
  height: auto;
  user-select: none;
  -webkit-user-drag: none;
}

/* CTA — BGODGAMES Lightning Gold */
.cta {
  position: fixed;
  left: 50%;
  bottom: 16px;
  width: min(540px, 92vw);
  height: 76px;
  z-index: 50;

  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;

  border-radius: 999px;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;

  font-weight: 1000;
  font-size: 28px;
  letter-spacing: .25px;
  color: var(--textDark);

  background:
    radial-gradient(120% 180% at 18% 0%, rgba(255,255,255,.52), transparent 44%),
    linear-gradient(
      180deg,
      var(--gold1) 0%,
      var(--gold2) 36%,
      var(--gold3) 72%,
      var(--gold4) 100%
    );

  border: 2px solid #fff0a8;

  box-shadow:
    0 18px 70px rgba(0, 0, 0, .68),
    0 0 0 3px rgba(255, 242, 163, .22) inset,
    0 0 0 7px rgba(139, 53, 255, .15) inset,
    0 0 24px rgba(255, 210, 60, .38),
    0 0 38px rgba(139, 53, 255, .28);

  transform: translateX(-50%);
  transition: transform .22s ease, opacity .22s ease, filter .22s ease;
}

.cta span {
  position: relative;
  z-index: 2;
}

.bolt {
  font-size: 32px;
  line-height: 1;
  filter:
    drop-shadow(0 0 8px rgba(255, 255, 90, .9))
    drop-shadow(0 0 14px rgba(139, 53, 255, .65));
  animation: boltFlicker 1.35s ease-in-out infinite;
}

/* แสงวิ่งบนปุ่ม */
.cta::before {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 999px;
  background: linear-gradient(
    110deg,
    transparent 0%,
    rgba(255, 255, 255, .82) 22%,
    rgba(255, 255, 255, .22) 42%,
    transparent 62%
  );
  transform: translateX(-62%);
  opacity: .72;
  filter: blur(1px);
  animation: shine 2.05s ease-in-out infinite;
  pointer-events: none;
  mix-blend-mode: overlay;
}

/* สายฟ้าเส้นบาง ๆ */
.cta::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 999px;
  background:
    linear-gradient(120deg,
      transparent 0%,
      rgba(139, 53, 255, 0) 28%,
      rgba(195, 66, 255, .75) 38%,
      rgba(255, 242, 163, .88) 44%,
      rgba(139, 53, 255, .72) 50%,
      rgba(139, 53, 255, 0) 64%,
      transparent 100%
    );
  opacity: .30;
  filter: blur(8px);
  z-index: -1;
  animation: lightningSweep 2.8s ease-in-out infinite;
}

@keyframes shine {
  0% {
    transform: translateX(-62%);
    opacity: .30;
  }

  42% {
    opacity: .96;
  }

  100% {
    transform: translateX(68%);
    opacity: .40;
  }
}

@keyframes lightningSweep {
  0% {
    opacity: .10;
    transform: translateX(-6px) scale(.98);
  }

  38% {
    opacity: .45;
  }

  55% {
    opacity: .22;
    transform: translateX(6px) scale(1.02);
  }

  100% {
    opacity: .10;
    transform: translateX(-6px) scale(.98);
  }
}

@keyframes boltFlicker {
  0%, 100% {
    opacity: 1;
    transform: rotate(-5deg) scale(1);
  }

  45% {
    opacity: .84;
    transform: rotate(2deg) scale(1.08);
  }

  58% {
    opacity: 1;
    transform: rotate(-2deg) scale(1.02);
  }
}

@keyframes powerPulse {
  0% {
    transform: translateX(-50%) scale(1);
    filter: brightness(1);
  }

  50% {
    transform: translateX(-50%) scale(1.035);
    filter: brightness(1.12);
  }

  100% {
    transform: translateX(-50%) scale(1);
    filter: brightness(1);
  }
}

.cta.pulse {
  animation: powerPulse 2.55s ease-in-out infinite;
}

.cta.is-down {
  transform: translateX(-50%) translateY(10px) scale(.985);
  opacity: .92;
}

.cta.is-up {
  transform: translateX(-50%) translateY(0) scale(1);
  opacity: 1;
}

.cta:active {
  transform: translateX(-50%) scale(.985);
  filter: brightness(1.12);
}

@media (prefers-reduced-motion: reduce) {
  .cta::before,
  .cta::after,
  .cta.pulse,
  .bolt {
    animation: none;
  }
}