/* ===== VARIÁVEIS CSS ===== */
:root {
  /* Cores principais do jogo */
  --primary-color: #5b1fa8;
  --secondary-color: #8436c7;
  --tertiary-color: #ff00cc;
  --light-purple: #d8a4ff;
  --dark-purple: #3a136b;
  /* Cores de feedback */
  --sucess-color: #4caf50;
  --error-color: #ff5555;
  --warning-color: #ff9800;
  --info-color: #2196f3;
  /* Cores auxiliares */
  --yellow: #ffcc00;
  --light-yellow: #ffde59;
  --white: #ffffff;
  --black: #222222;
  --gray: #e0e0e0;
  /* Cores de células */
  --cell-bg: #f0e5ff;
  --cell-fixed-bg: #e6d9ff;
  --cell-selected-bg: #33006688;
  --cell-highlight-bg: #ff00cc33;
  /* Sombras */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
  /* Transições */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --shadow-lg: 0 0 25px #ff00ccaa, 0 0 15px #00ffff88;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
/*Estilização geral do corpo do jogo*/
body {
  font-family: "Noto Sans JP", sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 10px;
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--secondary-color) 35%,
    #a64de0 65%,
    var(--light-purple) 100%
  );
  background-attachment: fixed;
  color: var(--black);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
/*Container principal*/
.container {
  text-align: center;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}
/* Cabeçalho */
.header-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  animation: fadeInTop 0.8s ease-in-out;
}
/* Título */
h1 {
  font-family: "Press Start 2P", monospace;
  /* fonte opcional estilo retrô */
  letter-spacing: 10px;
  font-size: clamp(2.5rem, 4vw, 2rem);
  background: linear-gradient(90deg, #ff00cc, #3333ff, #00ffff, #ff00cc);
  background-size: 400% 100%;
  -webkit-background-clip: text;
  background-clip: text; /* Compatibilidade */
  -webkit-text-fill-color: transparent;
  text-shadow: 1px 1px 0 var(--dark-purple);
  filter: contrast(130%) brightness(120%) saturate(150%);
  -webkit-animation: gradientMove 6s ease infinite;
  animation: gradientMove 6s ease infinite;
}
h1:hover {
  transform: scale(1.02);
}
h1::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.05) 0px,
    rgba(255, 255, 255, 0.05) 1px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  z-index: 2;
}
/* Grade do Sudoku*/
#sudoku-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  gap: 1px;
  margin: 1.5rem auto;
  padding: 4px;
  border: 4px solid var(--dark-purple);
  border-radius: 10px;
  background-color: var(--dark-purple);
  box-shadow: var(--shadow-lg);
  width: min(calc(100vw - 2rem), calc(95vh - 10rem));
  aspect-ratio: 1/1;
}
/* Celulas */
.cell {
  -webkit-user-select: none;
  user-select: none;
  width: 100%;
  aspect-ratio: 1;
  text-align: center;
  font-size: clamp(1rem, 4vw, 1.8rem);
  border: 1px solid var(--gray);
  background-color: var(--white);
  border-radius: 2px;
  font-weight: 700;
  color: var(--black);
  transition: all var(--transition-normal);
}
/* Célular animadas de inícion */
.cell.animated {
  animation: colorFlash 1.2s ease-in-out;
}
/* Células fixas */
.cell.fixed {
  background-color: var(--cell-fixed-bg);
  color: var(--dark-purple);
  font-weight: 800;
}
/* Células selecionadas */
.cell.selected {
  background-color: var(--cell-selected-bg);
  transform: scale(1.02);
  box-shadow: 0 0 8px var(--light-purple), 0 0 15px var(--light-purple);
  z-index: 1;
}
.cell.highlight {
  background-color: var(--cell-highlight-bg);
}
.cell.highlight-fixed {
  background-color: var(--primary-color);
  box-shadow: 0 0 0 2px var(--primary-color);
}
.cell.invalid {
  background-color: var(--error-color);
  color: var(--white);
  animation: shake 0.5s;
}
.cell:hover {
  background-color: var(--cell-bg);
  border-color: var(--primary-color);
}
.cell:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--dark-purple);
}
.cell:focus-visible {
  outline: 3px solid var(--dark-purple);
  outline-offset: 2px;
}
.cell::-webkit-outer-spin-button,
.cell::-webkit-inner-spin-button {
  -webkit-appearance: none;
}
/* Estilo para células com dica */
.cell.hint {
  background-color: var(--white);
  color: var(--black);
  font-weight: bold;
}
/* Bordas */
.cell:nth-child(3n) {
  border-right: 3px solid var(--dark-purple);
}
.cell:nth-child(9n) {
  border-right: none;
}
.cell:nth-child(n + 19):nth-child(-n + 27),
.cell:nth-child(n + 46):nth-child(-n + 54) {
  border-bottom: 3px solid var(--dark-purple);
}
/* Botões de controle de aúdio e controle do jogo*/
#new-game-button,
#solve-button,
#hint-button,
#undo-button,
#redo-button,
#play-button,
#pause-button,
#timer {
  font-family: "Press Start 2P", monospace;
  padding: 14px 20px;
  font-size: clamp(1rem, 4vw, 1.2rem);
  color: var(--white);
  border: none;
  -webkit-border-radius: 12px;
  -moz-border-radius: 12px;
  -ms-border-radius: 12px;
  -o-border-radius: 12px;
  border-radius: 12px;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: var(--shadow-md);
  max-width: 200px;
  display: block;
  background: linear-gradient(
    135deg,
    var(--dark-purple),
    var(--primary-color),
    var(--secondary-color)
  );
  background-size: 400% 400%;
  transition: all var(--transition-normal);
}
#new-game-button:hover,
#solve-button:hover,
#hint-button:hover,
#undo-button:hover:not(:disabled),
#redo-button:hover:not(:disabled),
#play-button:hover,
#pause-button:hover,
#timer:hover {
  box-shadow: 0 0 12px var(--primary-color);
  background-color: var(--secondary-color);
  transform: scale(1.05);
}
#undo-button:disabled,
#redo-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
#pause-button {
  display: none;
}
/* Modals */
.custom-modal {
  display: none;
  position: fixed;
  inset: 0;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(91, 31, 168, 0.7);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  -webkit-animation: fadeIn var(--transition-normal);
  animation: fadeIn var(--transition-normal);
}
.modal-content {
  background: linear-gradient(
    145deg,
    rgba(91, 31, 168, 0.95) 0%,
    rgba(132, 54, 199, 0.95) 50%,
    rgba(166, 77, 224, 0.9) 100%
  );
  padding: 1.5rem;
  border-radius: 15px;
  width: min(90%, 380px);
  box-shadow: var(--shadow-lg);
  color: var(--white);
  text-align: center;
  animation: slideIn var(--transition-normal);
}
.modal-button {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--primary-color)
  );
  color: var(--cell-bg);
  border: none;
  padding: 12px 30px;
  font-size: 1.1rem;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 700;
  transition: all var(--transition-normal);
  margin: 0.5rem;
}

.modal-button.secondary {
  background: linear-gradient(
    135deg,
    var(--secondary-color),
    var(--secondary-color)
  );
  color: var(--white);
}

.modal-button:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.modal-buttons-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

@media (min-width: 480px) {
  .modal-buttons-container {
    flex-direction: row;
    justify-content: center;
  }
}
audio {
  display: none;
}
/* Acessibilidade */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}
/* Rodapé */
.footer-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}
/* Estilos para o modal de dificuldade */
.difficulty-options {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}
.difficulty-btn {
  padding: 12px 24px;
  font-size: 1.1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-weight: 600;
}
/* Estilos para os botões de dificuldade */
.difficulty-btn[data-difficulty="easy"] {
  background-color: var(--light-purple);
  color: white;
}
.difficulty-btn[data-difficulty="medium"] {
  background-color: var(--warning-color);
  color: white;
}
.difficulty-btn[data-difficulty="hard"] {
  background-color: var(--error-color);
  color: white;
}
.difficulty-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
#difficultyModal {
  transition: opacity 0.3s ease;
  opacity: 0;
  pointer-events: none;
}
#difficultyModal.fade-in {
  opacity: 1;
  pointer-events: auto;
}
#difficultyModal.fade-out {
  opacity: 0;
  pointer-events: none;
}
/* ===== MEDIA QUERIES ===== */
@media (max-width: 480px) {
  body {
    padding: 5px;
    background-size: cover, cover;
  }
  #sudoku-grid {
    width: calc(100vw - 20px);
    max-width: calc(100vh - 100px);
  }
  .cell {
    font-size: clamp(0.8rem, 4.5vw, 1.2rem);
  }
  .cell.selected {
    box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.7);
  }

  .cell.highlight,
  .cell.highlight-fixed {
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3);
  }
  #solve-button {
    max-width: none;
    padding: 12px;
  }
  .modal-content {
    margin: 5vh auto;
    padding: 20px;
  }
}
@media (max-height: 600px) {
  #sudoku-grid {
    max-width: calc(100vw - 40px);
    max-height: calc(100vh - 150px);
  }

  h1 {
    margin-bottom: 10px;
    padding: 10px;
  }
}
/* ===== ANIMAÇÕES ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes slideIn {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}
/* Animação para o container de cabeçalho */
@keyframes fadeInTop {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes gradientMove {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}
/* Animação para células com dicas */
@keyframes hintPulse {
  0% {
    transform: scale(1);
    background-color: #d8a4ff;
  }
  50% {
    transform: scale(1.1);
    background-color: #e1c8ff;
    box-shadow: 0 0 10px #e1c8ff;
  }
  100% {
    transform: scale(1);
    background-color: #d8a4ff;
  }
}
/* Animação para tela de início */
@keyframes colorAnimation {
  0% {
    background-color: #5b1fa8;
  }
  25% {
    background-color: #8761b8;
  }
  50% {
    background-color: #70e2f7;
  }
  75% {
    background-color: #bd27bd;
  }
  100% {
    background-color: #5b1fa8;
  }
}
.grid-animation {
  animation: colorAnimation 2s infinite;
}
@keyframes colorFlash {
  0% {
    background-color: #5b1fa8;
  }
  10% {
    background-color: #6a41a0;
  }
  25% {
    background-color: #8761b8;
  }
  40% {
    background-color: #b0bac4;
  }
  50% {
    background-color: #70e2f7;
  }
  60% {
    background-color: #e068c8;
  }
  75% {
    background-color: #bd27bd;
  }
  90% {
    background-color: #b31593;
  }
  100% {
    background-color: #990b6e;
  }

  0% {
    box-shadow: 0 0 5px #fff;
    transform: scale(1);
  }
  10% {
    box-shadow: 0 0 10px #ff00cc;
    transform: scale(1.05);
  }
  20% {
    box-shadow: 0 0 15px #b60192;
    transform: scale(1.1);
  }
  30% {
    box-shadow: 0 0 20px #4e0c41;
    transform: scale(1.15);
  }
  40% {
    box-shadow: 0 0 10px #350c2d;
    transform: scale(1.05);
  }
  50% {
    box-shadow: 0 0 15px #350c2d;
    transform: scale(1.1);
  }
  60% {
    box-shadow: 0 0 20px #4e0c41;
    transform: scale(1.15);
  }
  70% {
    box-shadow: 0 0 10px #b60192;
    transform: scale(1.05);
  }
  80% {
    box-shadow: 0 0 5px #ff00cc;
    transform: scale(1);
  }
  90% {
    box-shadow: 0 0 5px #fff;
    transform: scale(1);
  }
  100% {
    box-shadow: 0 0 5px #fff;
    transform: scale(1);
  }
}

/* Estilo para o botão de modo de imagem */
#image-mode-button {
  font-family: "Press Start 2P", monospace;
  padding: 14px 20px;
  font-size: clamp(1rem, 4vw, 1.2rem);
  color: var(--white);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: var(--shadow-md);
  background: linear-gradient(
    135deg,
    var(--dark-purple),
    var(--primary-color),
    var(--secondary-color)
  );
  background-size: 400% 400%;
  transition: all var(--transition-normal);
}

#image-mode-button:hover,
#achievements-button:hover {
  box-shadow: 0 0 12px var(--primary-color);
  background-color: var(--secondary-color);
  transform: scale(1.05);
}

#achievements-button {
  font-family: "Press Start 2P", monospace;
  padding: 14px 20px;
  font-size: clamp(1rem, 4vw, 1.2rem);
  color: var(--white);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: var(--shadow-md);
  background: linear-gradient(
    135deg,
    var(--dark-purple),
    var(--primary-color),
    var(--secondary-color)
  );
  background-size: 400% 400%;
  transition: all var(--transition-normal);
}

/* Estilos para células no modo de imagem */
.cell.image-mode {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
}

.cell.image-mode input {
  display: none;
}

/* Ajustes para imagens em células pequenas */
@media (max-width: 480px) {
  .cell.image-mode {
    padding: 1px;
  }
}

/* Estilo para células com imagens quando selecionadas */
.cell.image-mode.selected {
  background-color: var(--cell-selected-bg);
  transform: scale(1.02);
  box-shadow: 0 0 8px var(--light-purple), 0 0 15px var(--light-purple);
}

/* Estilo para células com imagens quando destacadas */
.cell.image-mode.highlight {
  background-color: var(--cell-highlight-bg);
  box-shadow: 0 0 0 2px var(--primary-color);
}

.cell.image-mode.highlight-fixed {
  background-color: var(--primary-color);
  box-shadow: 0 0 0 2px var(--primary-color);
}

/* Estilos para conquistas */
.achievements-modal-content {
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
}

.achievements-stats {
  text-align: center;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

.achievements-stats p {
  font-size: 1.2rem;
  font-weight: bold;
  margin: 0;
}

.achievements-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.achievement-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
}

.achievement-item.unlocked {
  background: rgba(255, 255, 255, 0.15);
  border: 2px solid var(--success-color);
}

.achievement-item.locked {
  opacity: 0.6;
  background: rgba(0, 0, 0, 0.2);
}

.achievement-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.achievement-icon {
  font-size: 2.5rem;
  min-width: 60px;
  text-align: center;
}

.achievement-info {
  flex: 1;
}

.achievement-name {
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
  color: var(--white);
}

.achievement-description {
  margin: 0 0 0.5rem 0;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
}

.achievement-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: bold;
  background: var(--success-color);
  color: var(--white);
}

.achievement-badge.locked {
  background: rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.7);
}

.achievements-unlocked {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.achievements-unlocked .achievement-item {
  animation: slideIn var(--transition-normal);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 600px) {
  .achievements-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}