:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: rgba(19, 29, 55, 0.78);
  --panel-strong: rgba(26, 42, 78, 0.92);
  --line: rgba(162, 255, 201, 0.18);
  --text: #effff6;
  --muted: #9fb5a9;
  --accent: #70f0a4;
  --accent-strong: #b8ff7a;
  --danger: #ffcf70;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(112, 240, 164, 0.18), transparent 28rem),
    radial-gradient(circle at 85% 20%, rgba(184, 255, 122, 0.16), transparent 26rem),
    linear-gradient(135deg, #07101b 0%, #0b1020 54%, #111827 100%);
}

button {
  border: 0;
  font: inherit;
}

.app-shell {
  width: min(1120px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(340px, 1.18fr);
  gap: 28px;
  align-items: center;
  padding: 36px 0;
}

.hero-card,
.board-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card {
  border-radius: 30px;
  padding: 32px;
}

.board-card {
  position: relative;
  border-radius: 34px;
  padding: 28px;
  overflow: hidden;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 0.94;
  letter-spacing: -0.06em;
}

.intro {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.score-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 28px 0;
}

.score-panel div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.045);
}

.score-panel span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.score-panel strong {
  display: block;
  margin-top: 8px;
  font-size: 28px;
  line-height: 1;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.controls button {
  cursor: pointer;
  padding: 12px 18px;
  border-radius: 999px;
  color: #06120b;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(112, 240, 164, 0.22);
  transition: transform 0.18s ease, filter 0.18s ease;
}

.controls button:nth-child(2) {
  color: var(--text);
  background: rgba(255, 255, 255, 0.09);
  box-shadow: none;
}

.controls button:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

.board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(48px, 1fr));
  gap: clamp(8px, 1.7vw, 16px);
  padding: clamp(14px, 2.4vw, 24px);
  border-radius: 26px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.025)),
    var(--panel-strong);
}

.cell {
  aspect-ratio: 1;
  border: 1px solid rgba(162, 255, 201, 0.16);
  border-radius: 22px;
  background:
    radial-gradient(circle at 50% 32%, rgba(112, 240, 164, 0.14), transparent 44%),
    rgba(7, 16, 27, 0.72);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.cell:hover:not(:disabled) {
  transform: translateY(-3px) scale(1.02);
  border-color: rgba(184, 255, 122, 0.54);
}

.cell:disabled {
  cursor: wait;
}

.cell.hit {
  border-color: rgba(255, 207, 112, 0.95);
  background:
    radial-gradient(circle, rgba(255, 207, 112, 0.24), transparent 55%),
    rgba(7, 16, 27, 0.78);
}

.frog {
  width: 74%;
  height: 74%;
  display: grid;
  place-items: center;
  font-size: clamp(32px, 7vw, 54px);
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.35));
  transform: rotate(var(--rotation));
  transition: transform 0.2s cubic-bezier(0.2, 0.9, 0.3, 1.25);
}

.frog::before {
  content: "🐸";
  transform: rotate(180deg);
}

.orb-trail {
  position: fixed;
  left: var(--trail-x);
  top: var(--trail-y);
  width: var(--trail-length);
  height: 9px;
  border-radius: 999px;
  pointer-events: none;
  z-index: 20;
  opacity: 0;
  transform: rotate(var(--trail-angle)) scaleX(0.08);
  transform-origin: left center;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(184, 255, 122, 0.55), rgba(112, 240, 164, 0));
  filter: blur(1px) drop-shadow(0 0 14px rgba(184, 255, 122, 0.82));
  transition: opacity 0.12s ease, transform 0.34s ease;
}

.orb-trail.live {
  opacity: 1;
  transform: rotate(var(--trail-angle)) scaleX(1);
}

.orb {
  position: fixed;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  margin: -15px 0 0 -15px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 30;
  opacity: 0;
  background:
    radial-gradient(circle at 34% 30%, #fff 0 16%, #fff7b0 17% 30%, #d7ff78 42%, #70f0a4 72%);
  box-shadow:
    0 0 10px #fff,
    0 0 26px #d7ff78,
    0 0 54px rgba(112, 240, 164, 0.92);
  transition: transform 0.34s cubic-bezier(0.16, 0.8, 0.22, 1), opacity 0.12s ease;
}

.orb.live {
  opacity: 1;
}

.cell.impact {
  animation: impactPulse 0.28s ease;
}

@keyframes impactPulse {
  0% {
    box-shadow: 0 0 0 rgba(255, 255, 255, 0);
  }
  42% {
    transform: scale(1.07);
    box-shadow: 0 0 28px rgba(255, 207, 112, 0.52), inset 0 0 18px rgba(255, 247, 176, 0.24);
  }
  100% {
    box-shadow: 0 0 0 rgba(255, 255, 255, 0);
  }
}

.message {
  min-height: 28px;
  margin: 18px 8px 0;
  color: var(--muted);
  text-align: center;
  line-height: 1.6;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 24px);
  max-width: min(520px, calc(100% - 32px));
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  color: var(--text);
  background: rgba(7, 16, 27, 0.9);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 860px) {
  .app-shell {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .hero-card {
    padding: 26px;
  }
}

@media (max-width: 520px) {
  .app-shell {
    width: min(100% - 18px, 1120px);
    padding: 10px 0 22px;
  }

  .hero-card,
  .board-card {
    border-radius: 24px;
  }

  .score-panel {
    grid-template-columns: 1fr;
  }

  .board-card {
    padding: 12px;
  }

  .cell {
    border-radius: 14px;
  }
}