:root {
  --cor-titulo-inicial: #4caf50;
  --cor-texto-botao: #ffffff;
  --cor-fundo-botao-inicial: #f0a830;
  --cor-fundo-opcao: #8e5f3f;
  --cor-border-bottom-botao: #d97e1e;
  --cor-border-bottom-card: #6b4329;
  --cor-correta: #00cc66;
  --cor-correta-escura: #00994d;
  --cor-incorreta: #ff4d4d;
  --cor-incorreta-escura: #cc3333;
  --cor-fundo-transparente: rgba(255, 255, 255, 0.75);
  --cor-texto: #2d3e50;
  --cor-fundo-progresso: #d8e5bc;
  --cor-destaque: #f0a830;
  --cor-titulo-pergunta: #444444;
  --cor-borda-opcao: rgba(255, 255, 255, 0.47);
  --cor-fundo-opcao-blue: #3f5f8e;
  --cor-border-bottom-card-blue: #2a4366;
  --cor-fundo-opcao-green: #3f8e5f;
  --cor-border-bottom-card-green: #2a6643;
  --cor-fundo-opcao-purple: #5f3f8e;
  --cor-border-bottom-card-purple: #432a66;
  --borda-raio-pequeno: 12px;
  --borda-raio-medio: 18px;
  --borda-raio-grande: 25px;
  --sombra-padrao: 0 4px 6px rgba(0, 0, 0, 0.1);
  --sombra-elevada: 0 8px 16px rgba(0, 0, 0, 0.15);
  --sombra-botao: 0 4px 0 var(--cor-border-bottom-botao);
  --borda-padrao: 1px solid rgba(220, 230, 240, 0.5);
  --transicao-rapida: 0.3s ease;
  --transicao-normal: 0.5s ease;
  --transicao-lenta: 0.8s ease;
  --espaco-pequeno: 0.5rem;
  --espaco-padrao: 1rem;
  --espaco-medio: 1.5rem;
  --espaco-grande: 2rem;
  --fonte-principal: "Fredoka", sans-serif;
  --animacao-carta-flip: 0.5s ease;
  --animacao-carta-errada: 0.5s ease;
  --animacao-carta-certa: 1.5s ease-in-out;
  --escala-carta-hover: 1.05;
  --escala-carta-ativa: 1.1;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  
}

body {
  font-family: var(--fonte-principal);
  background: linear-gradient(135deg, #EBF5DD, #628cf6);
  min-height: 100vh;
  color: var(--cor-texto);
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
      url('data:image/svg+xml;utf8,<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><circle cx="10" cy="10" r="2" fill="%234caf50" opacity="0.1"/></svg>'),
      url('data:image/svg+xml;utf8,<svg width="40" height="40" viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="20" r="3" fill="%23f0a830" opacity="0.1"/></svg>');
  background-position: 0 0, 20px 20px;
  z-index: -1;
}

.screen {
  display: none;
  min-height: 100vh;
  padding: var(--espaco-grande);
}

.screen.active {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  animation: fadeIn var(--transicao-normal);
}

.container {
  width: 100%;
  max-width: 600px;
  max-height: 100vh;
  background-color: var(--cor-fundo-transparente);
  border-radius: var(--borda-raio-grande);
  padding: var(--espaco-grande);
  box-shadow: var(--sombra-elevada);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow:hidden;
}

.game-title {
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--cor-titulo-inicial);
  margin-bottom: var(--espaco-grande);
  position: relative;
  display: inline-block;
}

.game-title::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 100%;
  height: 0.10rem;
  background-color: var(--cor-destaque);
  border-radius: var(--borda-raio-pequeno);
}

.apresentacao-imagem {
  max-width: 100px;
  border-radius: 50%;
}

.game-description {
  font-size: clamp(1rem, 3vw, 1.5rem);
  margin-bottom: var(--espaco-grande);
  color: var(--cor-texto);
}

.btn {
  font-family: var(--fonte-principal);
  font-weight: 600;
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  padding: 0.75rem 1.5rem;
  border-radius: var(--borda-raio-grande);
  cursor: pointer;
  transition: all var(--transicao-rapida);
  margin: 0.5rem;
  min-width: 10rem;
  display: inline-block;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: all var(--transicao-lenta);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background-color: var(--cor-fundo-botao-inicial);
  color: var(--cor-texto-botao);
  border: none;
  border-bottom: 4px solid var(--cor-border-bottom-botao);
  box-shadow: var(--sombra-padrao);
}

.btn-primary:hover {
  background-color: var(--cor-destaque);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  border-bottom-width: 2px;
}

.btn-secondary {
  background-color: var(--cor-correta);
  color: var(--cor-texto-botao);
  border: none;
  border-bottom: 4px solid var(--cor-correta-escura);
  box-shadow: var(--sombra-padrao);
}

.btn-secondary:hover {
  background-color: var(--cor-correta-escura);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: translateY(0);
  border-bottom-width: 2px;
}

.btn-outline {
  background-color: white;
  color: var(--cor-texto);
  border: 2px solid var(--cor-fundo-opcao);
}

.game-header {
  width: 100%;
  max-width: 800px;
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: var(--espaco-grande);
  align-items: center;
}

.game-info, .timer-container {
  background-color: var(--cor-fundo-transparente);
  padding: var(--espaco-padrao);
  border-radius: var(--borda-raio-pequeno);
  box-shadow: var(--sombra-padrao);
}

.level-info, .score-info {
  margin-bottom: 0.5rem;
}

.level-info:last-child {
  margin-bottom: 0;
}

.level-label, .score-label {
  font-weight: 600;
  margin-right: 0.5rem;
}

.progress-container {
  background-color: var(--cor-fundo-transparente);
  padding: var(--espaco-padrao);
  border-radius: var(--borda-raio-pequeno);
  box-shadow: var(--sombra-padrao);
}

.progress-label {
  display: flex;
  align-items: center;
  font-size: clamp(0.9rem, 2vw, 1rem);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.progress-bar {
  height: 0.75rem;
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: var(--borda-raio-pequeno);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--cor-correta);
  width: 0%;
  transition: width var(--transicao-normal);
}

.timer-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.timer-icon {
  font-size: 1.5rem;
}

.timer {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 600;
}

.timer.time-alert {
  color: var(--cor-incorreta);
  animation: pulse var(--transicao-normal) infinite;
}

.game-board {
  display: grid;
  grid-template-columns: repeat(4, minmax(80px, 1fr));
  gap: var(--espaco-pequeno);
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  background-color: var(--cor-fundo-transparente);
  padding: var(--espaco-padrao);
  border-radius: var(--borda-raio-medio);
  box-shadow: var(--sombra-padrao);
}

.card {
  aspect-ratio: 1/1;
  position: relative;
  transform-style: preserve-3d;
  transition: transform var(--animacao-carta-flip);
  cursor: pointer;
  animation: scaleIn var(--transicao-normal) ease-out;
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--borda-raio-pequeno);
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: var(--sombra-padrao);
  transition: all var(--transicao-rapida);
}

.card-front {
  background-color: var(--cor-fundo-opcao);
  border: 0.25rem solid var(--cor-border-bottom-card);
  border-bottom-width: 0.5rem;
  transform: rotateY(0deg);
}

.card-front::before {
  content: "?";
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  color: var(--cor-texto-botao);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.card-back {
  background-color: #ffffff;
  transform: rotateY(180deg);
  border: 0.25rem solid var(--cor-border-bottom-card);
  overflow: hidden;
}

.card-back img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-back .card-text {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--cor-texto);
}

.card:hover:not(.flipped):not(.matched) .card-front {
  transform: scale(var(--escala-carta-hover));
  box-shadow: var(--sombra-elevada);
}

.card.flipped {
  transform: rotateY(180deg);
}

.card.matched .card-back {
  background-color: var(--cor-correta);
  border-color: var(--cor-correta-escura);
  box-shadow: 0 0 15px 5px rgba(0, 204, 102, 0.3);
  animation: glow var(--animacao-carta-certa) infinite;
}

.card.wrong .card-back {
  background-color: var(--cor-incorreta);
  border-color: var(--cor-incorreta-escura);
}

.card.wrong {
  animation: shake var(--animacao-carta-errada);
}

.game-controls {
  display: flex;
  justify-content: center;
  margin: 10px;
  gap: var(--espaco-padrao);
}

.result-container {
  max-width: 500px;
  max-height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

#result-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  color: var(--cor-titulo-inicial);
  margin-bottom: var(--espaco-padrao);
}

.stars-container {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: var(--espaco-padrao);
}

.star {
  font-size: 2rem;
  opacity: 0.3;
  transition: all var(--transicao-normal);
}

.star.active {
  opacity: 1;
  transform: scale(var(--escala-carta-ativa));
  animation: starPop var(--transicao-rapida) ease-out;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--espaco-pequeno);
  margin-bottom: var(--espaco-medio);
}

.stat-item {
  background-color: rgba(0, 0, 0, 0.05);
  padding: var(--espaco-pequeno);
  border-radius: var(--borda-raio-pequeno);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.stat-icon {
  font-size: 1.5rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--cor-texto);
  opacity: 0.8;
}

.stat-value {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 600;
  color: var(--cor-texto);
}

.result-message {
  background-color: var(--cor-fundo-progresso);
  padding: var(--espaco-padrao);
  border-radius: var(--borda-raio-pequeno);
  margin-bottom: var(--espaco-grande);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--cor-texto);
}

.result-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity var(--transicao-normal);
}

.modal.active {
  display: flex;
  opacity: 1;
}

.modal-content {
  background-color: white;
  border-radius: var(--borda-raio-grande);
  max-width: 90%;
  width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--sombra-elevada);
  animation: scaleIn var(--transicao-normal);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--espaco-grande);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.modal-header h2 {
  color: var(--cor-titulo-pergunta);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  margin: 0;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--cor-texto);
  opacity: 0.7;
  transition: opacity var(--transicao-rapida);
}

.close-btn:hover {
  opacity: 1;
}

.settings-container {
  padding: var(--espaco-grande);
}

.setting-group {
  margin-bottom: var(--espaco-grande);
}

.setting-group h3 {
  color: var(--cor-texto);
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  margin-bottom: var(--espaco-padrao);
  position: relative;
  display: inline-block;
}

.setting-group h3::after {
  content: '';
  position: absolute;
  bottom: -0.25rem;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--cor-destaque);
  border-radius: var(--borda-raio-pequeno);
}

.color-options {
  display: flex;
  gap: var(--espaco-padrao);
}

.color-option {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid transparent;
  transition: all var(--transicao-rapida);
}

.color-option:hover, .color-option.selected {
  transform: scale(var(--escala-carta-hover));
  border-color: white;
  box-shadow: 0 0 0 2px var(--cor-destaque);
}

.switch-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--espaco-padrao);
  background-color: rgba(0, 0, 0, 0.03);
  border-radius: var(--borda-raio-pequeno);
  margin-bottom: 0.5rem;
}

.switch {
  position: relative;
  display: inline-block;
  width: 3rem;
  height: 1.5rem;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: var(--transicao-rapida);
  border-radius: 1.5rem;
}

.slider:before {
  position: absolute;
  content: "";
  height: 1rem;
  width: 1rem;
  left: 0.25rem;
  bottom: 0.25rem;
  background-color: white;
  transition: var(--transicao-rapida);
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--cor-correta);
}

input:checked + .slider:before {
  transform: translateX(1.5rem);
}

.modal-footer {
  padding: var(--espaco-grande);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: space-between;
  gap: var(--espaco-padrao);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0) rotateY(180deg); }
  25% { transform: translateX(-8px) rotateY(180deg); }
  50% { transform: translateX(8px) rotateY(180deg); }
  75% { transform: translateX(-4px) rotateY(180deg); }
}

@keyframes glow {
  0% { box-shadow: 0 0 5px rgba(0, 204, 102, 0.3); }
  50% { box-shadow: 0 0 20px rgba(0, 204, 102, 0.6); }
  100% { box-shadow: 0 0 5px rgba(0, 204, 102, 0.3); }
}

@keyframes starPop {
  0% { transform: scale(0.5); opacity: 0; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(var(--escala-carta-ativa)); opacity: 1; }
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

@media (max-width: 768px) {
  .game-header {
      grid-template-columns: 1fr;
      gap: 0.9rem;
  }
  
  .game-board {
      grid-template-columns: repeat(4, minmax(140px, 1fr));
      max-width: 600px;
      padding: var(--espaco-padrao);
      gap: var(--espaco-pequeno);
  }
}

@media (max-width: 480px) {
  :root {
      --espaco-grande: 1.5rem;
      --espaco-padrao: 0.75rem;
  }
  
  * {
      -webkit-tap-highlight-color: transparent;
  }
  
  .container {
      padding: var(--espaco-padrao);
      max-height: 100vh;
  }
  
  .game-title {
      font-size: clamp(1.5rem, 4vw, 2rem);
  }
  
  .btn {
      width: auto;
      margin: 0.25rem;
      padding: 0.75rem 1.5rem;
  }
  
  .modal-footer .btn {
      min-width: 8rem;
      padding: 0.5rem 1rem;
      font-size: 0.9rem;
  }
  
  .game-board {
      grid-template-columns: repeat(4, minmax(90px, 1fr));
      max-width: 450px;
  }
  
  .modal-content {
      width: 95%;
  }
  
  .result-container {
      padding: var(--espaco-padrao);
  }
  
  .result-header {
      margin-bottom: var(--espaco-padrao);
  }
  
  .result-stats {
      gap: 0.25rem;
  }
  
  .result-message {
      margin-bottom: var(--espaco-padrao);
      padding: 0.5rem;
  }
  
  .result-buttons {
      gap: 0.25rem;
  }
  
  #result-title {
      font-size: clamp(1.25rem, 3vw, 1.75rem);
  }
  
  .stat-item {
      padding: 0.5rem;
  }
}