:root {
  --bg: #e5e7eb;
  --ink: #111827;
  --card: #ffffff;
  --blue: #2563eb; /* P1 */
  --orange: #f97316; /* P2 */
  --purple: #7c3aed; /* AI */
  --good: #10b981;
  --radius: 16px;
  --border-size: 6px;
}

* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  margin: 0;
  font-family: "Poppins", system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: var(--bg);
  color: var(--ink);
}
.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 18px;
}
.card {
  width: 100%;
  max-width: 1200px;
  background: var(--card);
  border: var(--border-size) solid var(--ink);
  border-radius: 20px;
  padding: 18px;
  box-shadow: 20px 20px 0 var(--ink);
  position: relative;
  overflow: hidden;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
h1 {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 800;
}
.subtitle {
  font-size: 0.9rem;
  opacity: 0.9;
}
.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.8rem;
  border: var(--border-size) solid var(--ink);
  border-radius: 999px;
  background: #fff;
  font-weight: 800;
}

.controls {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 14px 0;
}
.btn {
  cursor: pointer;
  border: var(--border-size) solid var(--ink);
  background: #fff;
  padding: 0.7rem 1rem;
  border-radius: 12px;
  font-weight: 800;
  box-shadow: 12px 12px 0 var(--ink);
}
.btn:active {
  transform: translate(-4px, -4px);
}
.small {
  font-size: 0.95rem;
  opacity: 0.95;
}

.home-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 12px;
}
.mode-card {
  padding: 14px;
  border: var(--border-size) solid var(--ink);
  border-radius: 12px;
  background: #fff;
  box-shadow: 12px 12px 0 var(--ink);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.game-area {
  display: none;
  margin-top: 12px;
}
.top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.arena {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.panel {
  min-height: 190px;
  border: var(--border-size) solid var(--ink);
  border-radius: 14px;
  background: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 12px 12px 0 var(--ink);
  font-weight: 800;
  transition: all 0.18s;
}
.panel .label {
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.panel .time {
  font-size: 2.4rem;
  margin-top: 8px;
}
.panel.go {
  background: #bbf7d0;
}
.panel.ready {
  background: #fef3c7;
}
.panel.foul {
  background: #fecaca;
}

/* avatars */
.avatar {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 4px solid var(--ink);
  display: grid;
  place-items: center;
  font-weight: 900;
  color: #fff;
  box-shadow: 8px 8px 0 var(--ink);
}
.avatar.p1 {
  background: var(--blue);
}
.avatar.p2 {
  background: var(--orange);
}
.avatar.ai {
  background: var(--purple);
}

.highlight {
  border-color: var(--good);
  box-shadow: 0 0 48px rgba(16, 185, 129, 0.55);
}
.winner-anim {
  animation: winnerPulse 900ms ease-in-out both;
}
@keyframes winnerPulse {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.08);
  }
  100% {
    transform: scale(1);
  }
}

/* traffic light / overlay */
.tl-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  z-index: 60;
}
.tl {
  width: 220px;
  height: 320px;
  border-radius: 18px;
  background: var(--card);
  border: var(--border-size) solid var(--ink);
  box-shadow: 20px 20px 0 var(--ink);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 18px;
  pointer-events: auto;
}
.lights {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.light {
  width: 110px;
  height: 110px;
  border-radius: 999px;
  border: 6px solid var(--ink);
  background: #fff;
  display: grid;
  place-items: center;
  box-shadow: 10px 10px 0 var(--ink);
  opacity: 0.2;
  transition: all 0.14s;
}
.light.on {
  opacity: 1;
  transform: translateY(-6px);
}
.light.red {
  background: #fecaca;
}
.light.yellow {
  background: #fef3c7;
}
.light.green {
  background: #bbf7d0;
}

.signal-text {
  position: absolute;
  z-index: 70;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-weight: 900;
  pointer-events: none;
  display: grid;
  place-items: center;
}
.signal-text .txt {
  font-size: 60px;
  padding: 12px 18px;
  border: var(--border-size) solid var(--ink);
  border-radius: 12px;
  background: var(--card);
  box-shadow: 16px 16px 0 var(--ink);
  opacity: 0;
  transform: scale(0.9) translateY(8px);
  transition: all 0.12s;
}
.txt.show {
  opacity: 1;
  transform: scale(1) translateY(0);
}
.txt.red {
  background: #fecaca;
}
.txt.yellow {
  background: #fef3c7;
}
.txt.green {
  background: #bbf7d0;
}

.footer {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  flex-wrap: wrap;
}
.touch-row {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 12px;
}
.touch-btn {
  flex: 1;
  padding: 12px;
  border: var(--border-size) solid var(--ink);
  border-radius: 12px;
  box-shadow: 8px 8px 0 var(--ink);
  font-weight: 900;
  background: #fff;
}

.history {
  padding: 10px;
  border: var(--border-size) solid var(--ink);
  border-radius: 12px;
  background: #fff;
  box-shadow: 12px 12px 0 var(--ink);
  max-height: 260px;
  overflow: auto;
}
.history h3 {
  margin: 0 0 8px 0;
}
.history ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.history li {
  padding: 8px;
  border-bottom: 1px dashed #ddd;
  font-size: 0.95rem;
}

.best-glow {
  animation: bestGlow 1200ms ease-in-out;
}
@keyframes bestGlow {
  0% {
    box-shadow: none;
  }
  40% {
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.95);
  }
  100% {
    box-shadow: none;
  }
}

.confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 90;
}
.confetti .piece {
  position: absolute;
  width: 10px;
  height: 16px;
  border-radius: 2px;
  opacity: 0.95;
  transform: translate3d(0, -50vh, 0);
  animation: fall linear forwards;
}
@keyframes fall {
  to {
    transform: translate3d(var(--tx, 0), 110vh, 0) rotate(360deg);
    opacity: 1;
  }
}

.match-banner {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  top: 18px;
  background: var(--card);
  border: var(--border-size) solid var(--ink);
  padding: 12px 22px;
  border-radius: 14px;
  box-shadow: 18px 18px 0 var(--ink);
  font-weight: 900;
  z-index: 120;
  display: none;
}

@media (max-width: 900px) {
  .home-grid {
    grid-template-columns: 1fr;
  }
  .arena {
    grid-template-columns: 1fr;
  }
  .tl {
    width: 180px;
    height: 280px;
  }
  .light {
    width: 78px;
    height: 78px;
  }
  .signal-text .txt {
    font-size: 40px;
  }
}
/* Universal Home Button Styling */
.home-button {
  position: fixed;
  top: 20px;
  left: 20px;
  background: #ffffff;
  color: #000000;
  text-decoration: none;
  padding: 12px 18px;
  border: 4px solid #000000;
  box-shadow: 6px 6px 0 #808080;
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 0.9rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  z-index: 1000;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
  user-select: none;
}

.home-button:hover {
  background: #000000;
  color: #ffffff;
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 #808080;
}

.home-button:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 #808080;
}