:root {
  color-scheme: dark;
  --bg: #07111f;
  --panel: rgba(12, 24, 43, 0.84);
  --panel-strong: #10213b;
  --text: #eef6ff;
  --muted: #a5b4c8;
  --accent: #6ee7b7;
  --accent-strong: #34d399;
  --danger: #fb7185;
  --bonus: #facc15;
  --frenzy: #c084fc;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 12%, rgba(250, 204, 21, 0.18), transparent 19rem),
    radial-gradient(circle at top left, rgba(52, 211, 153, 0.26), transparent 32rem),
    radial-gradient(circle at bottom right, rgba(192, 132, 252, 0.2), transparent 28rem),
    var(--bg);
  overflow-x: hidden;
}

body::before {
  animation: float-orbs 16s ease-in-out infinite alternate;
  background:
    radial-gradient(circle, rgba(110, 231, 183, 0.18), transparent 9rem),
    radial-gradient(circle, rgba(250, 204, 21, 0.14), transparent 7rem);
  content: "";
  filter: blur(4px);
  inset: -10% 10% auto auto;
  min-height: 22rem;
  pointer-events: none;
  position: fixed;
  width: 22rem;
}

button {
  border: 0;
  border-radius: 999px;
  color: #04111d;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 14px 32px rgba(52, 211, 153, 0.2);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  padding: 0.85rem 1.2rem;
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
}

button:hover,
button:focus-visible {
  box-shadow: 0 18px 42px rgba(52, 211, 153, 0.32);
  transform: translateY(-2px);
}

button:focus-visible {
  outline: 3px solid rgba(255, 255, 255, 0.8);
  outline-offset: 3px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.game-shell {
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(16rem, 1fr) minmax(20rem, 31rem);
  margin: 0 auto;
  max-width: 72rem;
  min-height: 100vh;
  padding: 3rem 1.25rem;
  place-content: center;
  position: relative;
}

.hero,
.how-to-play {
  align-self: center;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  margin: 0 0 0.75rem;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  background: linear-gradient(135deg, #ffffff 8%, var(--accent) 42%, var(--bonus));
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 16px 34px rgba(52, 211, 153, 0.16));
  font-size: clamp(3.8rem, 13vw, 8rem);
  letter-spacing: -0.08em;
  line-height: 0.9;
  margin-bottom: 1rem;
}

.intro {
  color: var(--muted);
  font-size: clamp(1rem, 3vw, 1.25rem);
  line-height: 1.7;
  max-width: 34rem;
}

.feature-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.25rem;
}

.feature-badges span {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  color: #dffcf0;
  font-size: 0.9rem;
  font-weight: 800;
  padding: 0.55rem 0.8rem;
}

.game-card,
.how-to-play {
  background: linear-gradient(145deg, rgba(15, 30, 54, 0.94), var(--panel));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 2rem;
  box-shadow: var(--shadow);
  padding: clamp(1rem, 4vw, 1.5rem);
}

.game-card {
  backdrop-filter: blur(18px);
  position: relative;
}

.game-card::before {
  background: linear-gradient(90deg, var(--accent), var(--bonus), var(--frenzy));
  border-radius: 999px;
  content: "";
  height: 0.25rem;
  inset: 0.8rem 1.6rem auto;
  opacity: 0.9;
  position: absolute;
}

.scoreboard {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 1rem;
  padding-top: 0.65rem;
}

.scoreboard > div {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1.25rem;
  padding: 0.9rem 1rem;
}

.label {
  color: var(--muted);
  display: block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.scoreboard strong {
  display: block;
  font-size: clamp(1.25rem, 4vw, 2rem);
  line-height: 1;
  margin-top: 0.35rem;
}

.board-wrap {
  position: relative;
}

#game-board {
  aspect-ratio: 1;
  background:
    radial-gradient(circle at 50% 50%, rgba(110, 231, 183, 0.08), transparent 18rem),
    #071827;
  border: 2px solid rgba(110, 231, 183, 0.38);
  border-radius: 1.25rem;
  display: block;
  max-width: 100%;
  width: 100%;
}

.frenzy-banner {
  background: linear-gradient(135deg, rgba(250, 204, 21, 0.96), rgba(192, 132, 252, 0.96));
  border-radius: 999px;
  box-shadow: 0 18px 60px rgba(192, 132, 252, 0.35);
  color: #190b2f;
  font-weight: 1000;
  left: 50%;
  letter-spacing: 0.08em;
  opacity: 0;
  padding: 0.65rem 1rem;
  pointer-events: none;
  position: absolute;
  text-transform: uppercase;
  top: 1rem;
  transform: translate(-50%, -0.6rem) scale(0.92);
  transition: opacity 180ms ease, transform 180ms ease;
}

.frenzy-banner.is-active {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

.status {
  color: var(--muted);
  font-weight: 700;
  min-height: 1.5rem;
  margin: 1rem 0;
  text-align: center;
}

.status.game-over {
  color: var(--danger);
}

.controls {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

#pause-button {
  background: #dbeafe;
  box-shadow: none;
}

.mobile-controls {
  display: none;
  gap: 0.4rem;
  justify-items: center;
  margin-top: 1rem;
}

.mobile-controls div {
  display: flex;
  gap: 0.4rem;
}

.mobile-controls button {
  border-radius: 1rem;
  min-width: 3.15rem;
  padding: 0.75rem;
}

.how-to-play {
  grid-column: 1 / -1;
}

.how-to-play h2 {
  margin-bottom: 0.75rem;
}

.how-to-play ul {
  color: var(--muted);
  display: grid;
  gap: 0.5rem;
  line-height: 1.6;
  margin: 0;
  padding-left: 1.25rem;
}

@keyframes float-orbs {
  from {
    transform: translate3d(0, 0, 0) rotate(0deg);
  }

  to {
    transform: translate3d(-3rem, 4rem, 0) rotate(18deg);
  }
}

@media (max-width: 880px) {
  .scoreboard {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 760px) {
  .game-shell {
    grid-template-columns: 1fr;
    padding-top: 1.5rem;
  }

  .mobile-controls {
    display: grid;
  }
}