:root {
  --cp-g900: #0b5d2a;
  --cp-g800: #0e6e33;
  --cp-g700: #107a38;
  --cp-g600: #138a40;
  --cp-g400: #22c55e;
  --BACKUP: #138a40;
  --cp-amber: #f59e0b;
  --cp-amber-dark: #d97706;
  --cp-amber-darker: #b45309;
  --cp-red: #facc15;
  --cp-text-primary: #f4fff4;
  --cp-text-muted: rgba(255, 255, 255, 0.65);
}

html, body {
  min-height: 100%;
  background:
    radial-gradient(1200px 600px at 20% -10%, rgba(19, 138, 64, 0.55), transparent 60%),
    radial-gradient(1000px 600px at 120% 20%, rgba(16, 122, 56, 0.45), transparent 55%),
    linear-gradient(180deg, var(--cp-g700), var(--cp-g900));
  color: var(--cp-text-primary);
}

body {
  font-family: "Helvetica", "Roboto", "Arial", sans-serif;
}

h1, h2, h3, h4, h5 {
  color: #ffffff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

.text-light-emphasis {
  color: var(--cp-text-muted) !important;
}

.cp-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)), var(--cp-g800);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--cp-text-primary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.cp-card .card-header {
  background: rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
}


.cp-board {
  --grid-size: 10;
  display: grid;
  grid-template-columns: repeat(var(--grid-size), 1fr);
  grid-template-rows: repeat(var(--grid-size), 1fr);
  gap: 0.35rem;
  width: 100%;
  height: 100%;
  user-select: none;
  touch-action: none;
}

.cp-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: clamp(0.9rem, 2.8vw, 1.65rem);
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 6px;
  color: #fff;
  transition: background 0.15s ease, transform 0.1s ease, border-color 0.2s ease;
}

.cp-cell:hover {
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-1px);
}

.cp-cell.cp-preview {
  background: rgba(34, 197, 94, 0.35);
  border-color: rgba(34, 197, 94, 0.65);
}

.cp-cell.cp-found {
  background: #e7f7ea;
  color: #14532d;
  border-color: rgba(34, 197, 94, 0.65);
  box-shadow: 0 0 12px rgba(34, 197, 94, 0.35);
}

.cp-cell.cp-error {
  background: rgba(225, 29, 72, 0.2);
  border-color: rgba(225, 29, 72, 0.55);
}

#boardWrapper {
  background: rgba(0, 0, 0, 0.12);
  border-radius: 12px;
  padding: 1rem;
}

#boardPlaceholder {
  color: #ffffff;
}

#startBtn.btn {
  background-color: #0d6efd;
  border-color: #0a58ca;
  color: #ffffff;
}

#startBtn.btn:hover,
#startBtn.btn:focus {
  background-color: #0b5ed7;
  border-color: #0a53be;
  color: #ffffff;
}

#resetBtn.btn {
  background-color: #f59e0b;
  border-color: #d97706;
  color: #111827;
}

#resetBtn.btn:hover,
#resetBtn.btn:focus {
  background-color: #d97706;
  border-color: #b45309;
  color: #ffffff;
}

#closeBtn.btn {
  background-color: #b91c1c;
  border-color: #991b1b;
  color: #ffffff;
}

#closeBtn.btn:hover,
#closeBtn.btn:focus {
  background-color: #991b1b;
  border-color: #7f1d1d;
  color: #ffffff;
}

.btn-blink {
  animation: btn-blink 1s ease-in-out infinite;
}

@keyframes btn-blink {
  0%,
  100% {
    box-shadow: 0 0 0 rgba(255, 255, 255, 0);
    transform: translateY(0);
    opacity: 1;
  }
  50% {
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.45);
    transform: translateY(-1px);
    opacity: 0.8;
  }
}

.list-group-item {
  background: rgba(0, 0, 0, 0.18);
  color: var(--cp-text-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.list-group-item + .list-group-item {
  border-top-width: 1px;
}

.list-group-item.word-found {
  background: rgba(34, 197, 94, 0.18);
  border-color: rgba(34, 197, 94, 0.45);
  color: #dcfce7;
}

.cp-source-text {
  white-space: pre-line;
  line-height: 1.6;
  color: var(--cp-text-primary);
  font-size: 0.95rem;
}

.cp-source-text .word-target {
  color: var(--cp-red);
  font-weight: 600;
}

.cp-source-text .word-target.word-found {
  color: #ffffff;
  background-color: #03421a; /* cor de fundo */
}

#historyList .list-group-item {
  background: rgba(0, 0, 0, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

#historyList .list-group-item small {
  color: rgba(255, 255, 255, 0.65);
}

.badge.bg-amber {
  background-color: var(--cp-amber);
  color: #111827;
}

@media (max-width: 767px) {
  #boardWrapper {
    padding: 0.5rem;
  }

  .cp-board {
    gap: 0.25rem;
  }
}

/* Dropdown de níveis: altura fixa com rolagem para muitos itens */
.dropdown-menu.levels-menu{
  max-height: 260px;
  overflow-y: auto;
  min-width: 220px;
}