@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=Orbitron:wght@500;700&display=swap");

:root {
  --deep-void: #05050a;
  --event-horizon: #1a1a24;
  --nebula-purple: #7a00e6;
  --supernova-cyan: #00f0ff;
  --stardust-silver: #e0e2e5;
  --danger: #ff2d55;
  --ease-void: cubic-bezier(0.2, 0.9, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--stardust-silver);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% 30%, rgba(122, 0, 230, 0.14), transparent 60%),
    radial-gradient(900px 500px at 20% 80%, rgba(0, 240, 255, 0.12), transparent 55%),
    var(--deep-void);
  overflow: hidden;
}

#fx {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.icon-btn {
  -webkit-tap-highlight-color: transparent;
  appearance: none;
  position: fixed;
  top: 18px;
  right: 18px;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--supernova-cyan);
  background: rgba(5, 5, 10, 0.25);
  color: var(--supernova-cyan);
  cursor: pointer;
  transition: transform 180ms var(--ease-void), box-shadow 220ms var(--ease-void),
    background-color 220ms var(--ease-void), color 220ms var(--ease-void), opacity 220ms var(--ease-void);
  z-index: 5;
}

.icon-btn:hover {
  background: var(--supernova-cyan);
  color: var(--deep-void);
  box-shadow: 0 0 15px var(--supernova-cyan);
}

.icon-btn:active {
  transform: translateY(1px) scale(0.99);
}

.icon-btn:focus-visible {
  outline: 2px solid rgba(122, 0, 230, 0.9);
  outline-offset: 3px;
}

.icon-btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

.bomb-text {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.7);
  opacity: 0;
  pointer-events: none;
  font-family: Orbitron, Inter, sans-serif;
  font-size: clamp(42px, 10vw, 92px);
  letter-spacing: 0.08em;
  color: var(--supernova-cyan);
  text-shadow: 0 0 24px rgba(0, 240, 255, 0.75), 0 0 60px rgba(122, 0, 230, 0.25);
  z-index: 4;
  will-change: transform, opacity, filter;
  filter: blur(10px);
}

.show-bomb-text .bomb-text {
  animation: bombTextIn 720ms var(--ease-void) 1 forwards;
}

@keyframes bombTextIn {
  0% {
    transform: translate(-50%, -50%) scale(0.35);
    opacity: 0;
    filter: blur(14px);
  }
  55% {
    transform: translate(-50%, -50%) scale(1.08);
    opacity: 1;
    filter: blur(1px);
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    filter: blur(0px);
  }
}

.shell {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: clamp(20px, 6vw, 80px);
}

.hud {
  width: min(720px, 100%);
  display: grid;
  gap: clamp(16px, 3.5vw, 26px);
  place-items: center;
  text-align: center;
  transition: opacity 280ms var(--ease-void), transform 280ms var(--ease-void), filter 280ms var(--ease-void);
  will-change: opacity, transform, filter;
}

.hud-hidden .hud {
  opacity: 0;
  transform: translateY(10px) scale(0.98);
  filter: blur(10px);
  pointer-events: none;
}

.panel {
  width: min(720px, 100%);
  background: linear-gradient(180deg, rgba(26, 26, 36, 0.9), rgba(26, 26, 36, 0.76));
  border: 1px solid rgba(122, 0, 230, 0.9);
  border-radius: 18px;
  padding: clamp(18px, 4vw, 34px);
  display: grid;
  gap: clamp(16px, 3.5vw, 26px);
  position: relative;
  isolation: isolate;
}

.card-gone .panel {
  pointer-events: none;
  animation: panelVanish 520ms var(--ease-void) 1 forwards;
}

@keyframes panelVanish {
  0% {
    transform: translateY(0) scale(1);
    opacity: 1;
    filter: blur(0px);
  }
  100% {
    transform: translateY(10px) scale(0.78);
    opacity: 0;
    filter: blur(12px);
  }
}

.panel::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 20px;
  background: radial-gradient(400px 220px at 50% 0%, rgba(0, 240, 255, 0.18), transparent 60%),
    radial-gradient(420px 240px at 10% 90%, rgba(122, 0, 230, 0.2), transparent 65%);
  filter: blur(12px);
  opacity: 0.8;
  z-index: -1;
}

.header {
  display: grid;
  gap: 10px;
}

.title {
  margin: 0;
  font-family: Orbitron, Inter, sans-serif;
  letter-spacing: 0.02em;
  font-size: clamp(22px, 4vw, 36px);
}

.subtitle {
  margin: 0;
  opacity: 0.86;
  line-height: 1.4;
  font-size: clamp(14px, 2.4vw, 16px);
}

.stage {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: clamp(14px, 3vw, 20px);
  align-items: center;
  padding: clamp(14px, 3vw, 18px);
  border: 1px solid rgba(122, 0, 230, 0.65);
  border-radius: 16px;
  background: rgba(5, 5, 10, 0.35);
}

.sigil {
  height: 110px;
  border-radius: 16px;
  border: 1px solid rgba(0, 240, 255, 0.35);
  background: radial-gradient(circle at 50% 50%, rgba(0, 240, 255, 0.25), transparent 60%),
    radial-gradient(circle at 50% 50%, rgba(122, 0, 230, 0.16), transparent 65%);
  position: relative;
  overflow: hidden;
}

.sigil::before,
.sigil::after {
  content: "";
  position: absolute;
  inset: -40%;
  background: conic-gradient(
    from 180deg,
    rgba(0, 240, 255, 0),
    rgba(0, 240, 255, 0.32),
    rgba(122, 0, 230, 0.24),
    rgba(0, 240, 255, 0)
  );
  animation: sigilSpin 8s linear infinite;
  filter: blur(0.2px);
  opacity: 0.8;
}

.sigil::after {
  animation-duration: 12s;
  opacity: 0.45;
}

@keyframes sigilSpin {
  to {
    transform: rotate(360deg);
  }
}

.readout {
  display: grid;
  gap: 6px;
}

.label {
  font-family: Orbitron, Inter, sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
  opacity: 0.78;
}

.result {
  font-family: Orbitron, Inter, sans-serif;
  font-size: clamp(24px, 5vw, 44px);
  letter-spacing: 0.04em;
  line-height: 1.05;
}

.hint {
  margin: 0;
  opacity: 0.82;
  line-height: 1.35;
  font-size: clamp(13px, 2.3vw, 15px);
}

.actions {
  display: grid;
  place-items: center;
}

.btn {
  -webkit-tap-highlight-color: transparent;
  appearance: none;
  border: 1px solid var(--supernova-cyan);
  background: transparent;
  color: var(--supernova-cyan);
  font-family: Orbitron, Inter, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 14px 18px;
  border-radius: 14px;
  width: min(420px, 100%);
  cursor: pointer;
  transition: transform 180ms var(--ease-void), box-shadow 220ms var(--ease-void),
    background-color 220ms var(--ease-void), color 220ms var(--ease-void), filter 220ms var(--ease-void);
  touch-action: manipulation;
}

.btn:hover {
  background: var(--supernova-cyan);
  color: var(--deep-void);
  box-shadow: 0 0 15px var(--supernova-cyan);
  filter: saturate(1.1);
}

.btn:active {
  transform: translateY(1px) scale(0.99);
}

.btn:focus-visible {
  outline: 2px solid rgba(122, 0, 230, 0.9);
  outline-offset: 3px;
}

.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  filter: saturate(0.8);
}

.is-spinning .panel {
  animation: panelBreath 700ms var(--ease-void) infinite;
}

.is-spinning .sigil::before {
  animation-duration: 1.6s;
}

.is-spinning .sigil::after {
  animation-duration: 2.2s;
}

.is-spinning .btn {
  box-shadow: 0 0 0 rgba(0, 240, 255, 0);
}

.phase-1 .panel {
  animation-duration: 550ms;
}

.phase-1 .btn {
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
}

.phase-2 .panel {
  animation-duration: 380ms;
}

.phase-2 .panel {
  transform-origin: center;
  animation-name: panelBreath, panelTremor;
  animation-duration: 380ms, 160ms;
  animation-timing-function: var(--ease-void), linear;
  animation-iteration-count: infinite, infinite;
}

.phase-2 .btn {
  box-shadow: 0 0 26px rgba(0, 240, 255, 0.55);
  transform: scale(1.01);
}

.phase-3 .panel {
  animation-duration: 260ms;
}

.phase-3 .btn {
  box-shadow: 0 0 34px rgba(0, 240, 255, 0.7);
  transform: scale(1.02);
}

.reveal .result {
  color: var(--supernova-cyan);
  text-shadow: 0 0 18px rgba(0, 240, 255, 0.55);
  animation: revealPop 520ms var(--ease-void) 1;
}

@keyframes panelBreath {
  0%,
  100% {
    transform: translateY(0) scale(1);
    filter: saturate(1);
  }
  50% {
    transform: translateY(-1px) scale(1.008);
    filter: saturate(1.08);
  }
}

@keyframes panelTremor {
  0% {
    transform: translateX(0) rotate(0deg);
  }
  25% {
    transform: translateX(-0.7px) rotate(-0.12deg);
  }
  50% {
    transform: translateX(0.7px) rotate(0.12deg);
  }
  75% {
    transform: translateX(-0.35px) rotate(-0.08deg);
  }
  100% {
    transform: translateX(0) rotate(0deg);
  }
}

@keyframes revealPop {
  0% {
    transform: translateY(3px) scale(0.98);
    filter: blur(0.3px);
  }
  55% {
    transform: translateY(-1px) scale(1.04);
  }
  100% {
    transform: translateY(0) scale(1);
    filter: blur(0px);
  }
}

@media (max-width: 520px) {
  .stage {
    grid-template-columns: 1fr;
  }
  .sigil {
    height: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .show-bomb-text .bomb-text {
    animation: none !important;
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
    filter: blur(0px);
  }
  .hud {
    transition: none;
  }
  .card-gone .panel {
    animation: none !important;
    opacity: 0;
    transform: translateY(10px) scale(0.78);
    filter: blur(12px);
  }
  .show-bomb-text .bomb-text,
  .sigil::before,
  .sigil::after,
  .is-spinning .panel,
  .phase-2 .panel,
  .phase-3 .panel,
  .reveal .result {
    animation: none !important;
  }
  .btn {
    transition: none;
  }
}