/* YILDIZ ARENASI — soru öncesi premium açılış */
#duel-game-screen.ndg-arena-intro-active #nova-vs-hud,
#duel-game-screen.ndg-arena-intro-active .ndg-meta-row,
#duel-game-screen.ndg-arena-intro-active .question-container,
#duel-game-screen.ndg-arena-intro-active .options-container,
#duel-game-screen.ndg-arena-intro-active .players-info-row,
#duel-game-screen.ndg-arena-intro-active .score-container {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

#duel-game-screen .ndg-arena-intro {
  position: absolute !important;
  inset: 0;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

#duel-game-screen .ndg-arena-intro.ndg-arena-intro--visible {
  opacity: 1;
  visibility: visible;
}

#duel-game-screen .ndg-arena-intro.ndg-arena-intro--exit {
  opacity: 0;
  transition: opacity 0.78s cubic-bezier(0.4, 0, 0.2, 1);
}

#duel-game-screen .ndg-arena-intro__veil {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 85% 55% at 50% 42%, rgba(8, 12, 24, 0.28), rgba(4, 7, 16, 0.62)),
    linear-gradient(180deg, rgba(4, 7, 16, 0.35) 0%, rgba(4, 7, 16, 0.48) 100%);
  opacity: 0.92;
}

#duel-game-screen .ndg-arena-intro__neon {
  position: absolute;
  top: 8%;
  bottom: 8%;
  width: 3px;
  border-radius: 999px;
  opacity: 0;
  transform: scaleY(0.35);
  filter: blur(0.4px);
}

#duel-game-screen .ndg-arena-intro--visible .ndg-arena-intro__neon {
  animation: ndg-intro-neon-in 1.05s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

#duel-game-screen .ndg-arena-intro__neon--left {
  left: max(14px, env(safe-area-inset-left));
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(56, 189, 248, 0.15) 12%,
    rgba(34, 211, 238, 0.95) 50%,
    rgba(56, 189, 248, 0.15) 88%,
    transparent 100%
  );
  box-shadow:
    0 0 18px rgba(34, 211, 238, 0.55),
    0 0 36px rgba(56, 189, 248, 0.28);
}

#duel-game-screen .ndg-arena-intro__neon--right {
  right: max(14px, env(safe-area-inset-right));
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(251, 191, 36, 0.12) 12%,
    rgba(250, 204, 21, 0.92) 50%,
    rgba(251, 191, 36, 0.12) 88%,
    transparent 100%
  );
  box-shadow:
    0 0 18px rgba(250, 204, 21, 0.5),
    0 0 34px rgba(251, 191, 36, 0.24);
}

@keyframes ndg-intro-neon-in {
  0% {
    opacity: 0;
    transform: scaleY(0.2);
  }
  100% {
    opacity: 1;
    transform: scaleY(1);
  }
}

#duel-game-screen .ndg-arena-intro__spark {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #fef9c3;
  box-shadow: 0 0 10px rgba(254, 240, 138, 0.9);
  opacity: 0;
}

#duel-game-screen .ndg-arena-intro--visible .ndg-arena-intro__spark--a {
  top: 22%;
  left: 18%;
  animation: ndg-intro-spark 2.2s ease-in-out 0.2s infinite;
}

#duel-game-screen .ndg-arena-intro--visible .ndg-arena-intro__spark--b {
  top: 34%;
  right: 22%;
  animation: ndg-intro-spark 2.6s ease-in-out 0.55s infinite;
}

#duel-game-screen .ndg-arena-intro--visible .ndg-arena-intro__spark--c {
  bottom: 28%;
  left: 42%;
  animation: ndg-intro-spark 2.4s ease-in-out 0.9s infinite;
}

@keyframes ndg-intro-spark {
  0%,
  100% {
    opacity: 0;
    transform: scale(0.4);
  }
  45% {
    opacity: 0.85;
    transform: scale(1.2);
  }
}

#duel-game-screen .ndg-arena-intro__panel {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: clamp(22px, 5vw, 34px) clamp(28px, 7vw, 48px);
  max-width: min(92vw, 420px);
  border-radius: 22px;
  background:
    linear-gradient(165deg, rgba(15, 23, 42, 0.72) 0%, rgba(8, 12, 24, 0.55) 100%);
  border: 1px solid rgba(148, 163, 184, 0.22);
  box-shadow:
    0 24px 64px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 0 48px rgba(56, 189, 248, 0.08),
    0 0 48px rgba(251, 191, 36, 0.06);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  transform: translateY(18px) scale(0.94);
}

#duel-game-screen .ndg-arena-intro--visible .ndg-arena-intro__panel {
  animation: ndg-intro-panel-in 0.82s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

#duel-game-screen .ndg-arena-intro--exit .ndg-arena-intro__panel {
  animation: ndg-intro-panel-out 0.78s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes ndg-intro-panel-in {
  0% {
    opacity: 0;
    transform: translateY(22px) scale(0.92);
    filter: blur(6px);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

@keyframes ndg-intro-panel-out {
  0% {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
  100% {
    opacity: 0;
    transform: translateY(-12px) scale(1.03);
    filter: blur(4px);
  }
}

#duel-game-screen .ndg-arena-intro__kicker {
  font-size: clamp(10px, 2.6vw, 12px);
  font-weight: 900;
  letter-spacing: 0.48em;
  text-indent: 0.48em;
  color: rgba(196, 181, 253, 0.92);
  margin-bottom: 10px;
  opacity: 0;
}

#duel-game-screen .ndg-arena-intro--visible .ndg-arena-intro__kicker {
  animation: ndg-intro-fade-up 0.65s cubic-bezier(0.22, 1, 0.36, 1) 0.12s forwards;
}

#duel-game-screen .ndg-arena-intro__title {
  margin: 0;
  font-size: clamp(26px, 7.2vw, 38px);
  font-weight: 950;
  line-height: 1.08;
  letter-spacing: 0.06em;
  background: linear-gradient(
    110deg,
    #fff9e6 0%,
    #fde68a 22%,
    #fbbf24 48%,
    #fef3c7 72%,
    #fde68a 100%
  );
  background-size: 180% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 2px 16px rgba(251, 191, 36, 0.42));
  opacity: 0;
}

#duel-game-screen .ndg-arena-intro--visible .ndg-arena-intro__title {
  animation:
    ndg-intro-fade-up 0.72s cubic-bezier(0.22, 1, 0.36, 1) 0.22s forwards,
    ndg-intro-title-shine 3.2s ease-in-out 0.5s infinite;
}

@keyframes ndg-intro-title-shine {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

#duel-game-screen .ndg-arena-intro__divider {
  width: min(180px, 52vw);
  height: 1px;
  margin: 14px auto 12px;
  background: linear-gradient(
    90deg,
    rgba(34, 211, 238, 0.05) 0%,
    rgba(34, 211, 238, 0.55) 22%,
    rgba(250, 204, 21, 0.75) 50%,
    rgba(34, 211, 238, 0.55) 78%,
    rgba(34, 211, 238, 0.05) 100%
  );
  opacity: 0;
  transform: scaleX(0.4);
}

#duel-game-screen .ndg-arena-intro--visible .ndg-arena-intro__divider {
  animation: ndg-intro-divider 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.38s forwards;
}

@keyframes ndg-intro-divider {
  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

#duel-game-screen .ndg-arena-intro__wish {
  margin: 0;
  font-size: clamp(15px, 4vw, 19px);
  font-weight: 800;
  letter-spacing: 0.28em;
  text-indent: 0.28em;
  text-transform: uppercase;
  color: rgba(224, 242, 254, 0.94);
  text-shadow: 0 0 20px rgba(125, 211, 252, 0.35);
  opacity: 0;
}

#duel-game-screen .ndg-arena-intro--visible .ndg-arena-intro__wish {
  animation: ndg-intro-fade-up 0.68s cubic-bezier(0.22, 1, 0.36, 1) 0.48s forwards;
}

@keyframes ndg-intro-fade-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  #duel-game-screen .ndg-arena-intro__panel,
  #duel-game-screen .ndg-arena-intro__kicker,
  #duel-game-screen .ndg-arena-intro__title,
  #duel-game-screen .ndg-arena-intro__divider,
  #duel-game-screen .ndg-arena-intro__wish,
  #duel-game-screen .ndg-arena-intro__neon,
  #duel-game-screen .ndg-arena-intro__spark {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }
}