:root {
  --color-amber: #ff8c1a;
  --color-navy: #0f1c3f;
  --color-teal: #06d6a0;
  --color-yellow: #ffd400;
  --color-ink: #14142b;
  --font-playful: "Baloo 2", "Segoe UI Rounded", "Arial Rounded MT Bold",
    "Comic Sans MS", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-playful);
  color: var(--color-ink);
  background: radial-gradient(
      circle at 20% 10%,
      rgba(255, 255, 255, 0.25),
      transparent 45%
    ),
    linear-gradient(160deg, var(--color-navy), var(--color-navy) 45%, var(--color-teal));
  background-attachment: fixed;
}

#name-entry-view {
  width: 100%;
  max-width: 400px;
  padding: 2rem 1.5rem;
  text-align: center;
  background: #fff;
  border-radius: 1.5rem;
  border: 4px solid var(--color-ink);
  box-shadow: 0 0.6rem 0 var(--color-ink);
  margin: 1rem;
}

#name-entry-view h1 {
  margin: 0;
  font-size: clamp(1.8rem, 8vw, 2.4rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-amber);
  text-shadow: 0.08em 0.08em 0 var(--color-ink);
}

#name-entry-view label {
  display: block;
  margin-top: 1rem;
  font-weight: 700;
  font-size: 1rem;
}

#name-entry-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

#name-entry-form input {
  width: 100%;
  min-height: 3rem;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1.1rem;
  border: 3px solid var(--color-ink);
  border-radius: 0.75rem;
  overflow: hidden;
  text-overflow: ellipsis;
}

#name-entry-form input:focus {
  outline: 3px solid var(--color-teal);
  outline-offset: 2px;
}

#name-entry-form button {
  min-height: 3rem;
  padding: 0.75rem;
  font-family: inherit;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-ink);
  background: var(--color-amber);
  border: 3px solid var(--color-ink);
  border-radius: 0.75rem;
  box-shadow: 0 0.3rem 0 var(--color-ink);
  cursor: pointer;
}

#name-entry-form button:active {
  box-shadow: none;
  transform: translateY(0.3rem);
}

#card-view {
  width: 100%;
  max-width: 480px;
  padding: clamp(0.75rem, 4vw, 1.5rem);
}

#card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(0.4rem, 2vw, 0.6rem);
}

#card-grid[hidden] {
  display: none;
}

.bingo-square {
  aspect-ratio: 1;
  min-width: 0;
  min-height: 44px;
  padding: clamp(0.25rem, 1.5vw, 0.5rem);
  font-family: inherit;
  font-weight: 700;
  font-size: clamp(0.65rem, 2.9vw, 0.85rem);
  line-height: 1.15;
  overflow-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 3px solid var(--color-ink);
  border-radius: 0.9rem;
  background: #fff;
  color: var(--color-ink);
  cursor: pointer;
  box-shadow: 0 0.25rem 0 var(--color-ink);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.bingo-square:active {
  transform: translateY(0.25rem);
  box-shadow: none;
}

.bingo-square.ticked {
  background: var(--color-teal);
  color: var(--color-ink);
  border-color: var(--color-ink);
  box-shadow: none;
  transform: translateY(0.25rem);
}

.view-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: clamp(0.75rem, 3vw, 1rem);
}

.view-tab {
  flex: 1;
  min-height: 2.75rem;
  padding: 0.5rem;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-ink);
  background: #fff;
  border: 3px solid var(--color-ink);
  border-radius: 0.75rem;
  box-shadow: 0 0.25rem 0 var(--color-ink);
  cursor: pointer;
}

.view-tab:active {
  transform: translateY(0.25rem);
  box-shadow: none;
}

.view-tab[aria-pressed="true"] {
  background: var(--color-amber);
}

#leaderboard-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.leaderboard-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1rem;
  background: #fff;
  border: 3px solid var(--color-ink);
  border-radius: 0.9rem;
  box-shadow: 0 0.25rem 0 var(--color-ink);
}

.leaderboard-name {
  flex: 1;
  font-weight: 700;
  font-size: 1rem;
  overflow-wrap: break-word;
}

.leaderboard-progress {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-navy);
}

.leaderboard-item.winner {
  background: var(--color-yellow);
}

.leaderboard-badge {
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--color-navy);
  white-space: nowrap;
}

#celebration-overlay[hidden] {
  display: none;
}

#celebration-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  pointer-events: none;
  z-index: 10;
  background: rgba(15, 28, 63, 0.4);
}

.celebration-banner {
  font-family: var(--font-playful);
  font-size: clamp(2.5rem, 14vw, 5.5rem);
  font-weight: 800;
  color: var(--color-yellow);
  text-shadow: 0.06em 0.06em 0 var(--color-amber), 0 0 1em rgba(0, 0, 0, 0.35);
  letter-spacing: 0.05em;
  animation: bingo-banner-pop 0.6s ease-out;
}

.confetti-container {
  position: absolute;
  inset: 0;
}

.confetti-piece {
  position: absolute;
  top: -10%;
  width: 0.6rem;
  height: 1rem;
  background: #ffce00;
  animation: confetti-fall 2.6s linear infinite;
}

.confetti-piece:nth-child(4n) {
  background: var(--color-amber);
}

.confetti-piece:nth-child(4n + 1) {
  background: #33d1ff;
}

.confetti-piece:nth-child(4n + 2) {
  background: #7cff6b;
}

.confetti-piece:nth-child(odd) {
  border-radius: 50%;
}

.confetti-piece:nth-child(1) { left: 2%; animation-delay: 0s; }
.confetti-piece:nth-child(2) { left: 6%; animation-delay: 0.3s; }
.confetti-piece:nth-child(3) { left: 10%; animation-delay: 0.6s; }
.confetti-piece:nth-child(4) { left: 14%; animation-delay: 0.1s; }
.confetti-piece:nth-child(5) { left: 18%; animation-delay: 0.5s; }
.confetti-piece:nth-child(6) { left: 22%; animation-delay: 0.9s; }
.confetti-piece:nth-child(7) { left: 26%; animation-delay: 0.2s; }
.confetti-piece:nth-child(8) { left: 30%; animation-delay: 0.7s; }
.confetti-piece:nth-child(9) { left: 34%; animation-delay: 0.4s; }
.confetti-piece:nth-child(10) { left: 38%; animation-delay: 0.8s; }
.confetti-piece:nth-child(11) { left: 42%; animation-delay: 0.15s; }
.confetti-piece:nth-child(12) { left: 46%; animation-delay: 0.55s; }
.confetti-piece:nth-child(13) { left: 50%; animation-delay: 0.25s; }
.confetti-piece:nth-child(14) { left: 54%; animation-delay: 0.65s; }
.confetti-piece:nth-child(15) { left: 58%; animation-delay: 0.35s; }
.confetti-piece:nth-child(16) { left: 62%; animation-delay: 0.75s; }
.confetti-piece:nth-child(17) { left: 66%; animation-delay: 0.05s; }
.confetti-piece:nth-child(18) { left: 70%; animation-delay: 0.45s; }
.confetti-piece:nth-child(19) { left: 74%; animation-delay: 0.85s; }
.confetti-piece:nth-child(20) { left: 78%; animation-delay: 0.3s; }
.confetti-piece:nth-child(21) { left: 84%; animation-delay: 0.6s; }
.confetti-piece:nth-child(22) { left: 90%; animation-delay: 0.9s; }
.confetti-piece:nth-child(23) { left: 96%; animation-delay: 0.2s; }
.confetti-piece:nth-child(24) { left: 100%; animation-delay: 0.5s; }

@keyframes confetti-fall {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(110vh) rotate(360deg);
    opacity: 0.8;
  }
}

@keyframes bingo-banner-pop {
  0% {
    transform: scale(0.4);
    opacity: 0;
  }
  60% {
    transform: scale(1.1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}