:root {
  /* Base dimensions */
  --puzzle-width: min(100%, 1089px);

  /* Grid dimensions */
  --grid-height: calc(var(--puzzle-width) * 1.017);
}

body {
  font-family: "Arial", sans-serif;
  margin: 0;
  padding: 20px;
  background-color: #f8f9fa;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.invisible {
  visibility: hidden;
  height: 0;
  margin: 0;
  padding: 0;
}

.puzzle-container {
  position: relative;
  width: 100%;
  max-width: 1089px;
  margin: 0 auto;
}

.puzzle-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1089/1846;
}

.puzzle-image {
  width: 100%;
  height: auto;
  display: block;
}

#crossword-grid {
  position: absolute;
  bottom: 0;
  left: 16.67%; /* 2/12 of width */
  width: 83.33%; /* 10/12 of width */
  height: var(--grid-height);
  pointer-events: all;
  z-index: 50; /* Ensure grid is above the background image */
}

.cell {
  position: absolute;
  width: 10%; /* 1/10 of grid width */
  height: 8.33%; /* 1/12 of grid height */
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: all;
}

/* Cell input styling (consolidated) */
.cell input {
  width: 90%;
  height: 90%;
  border: none;
  text-align: center;
  background-color: transparent;
  color: #000000;
  text-shadow: none;
  font-weight: bold;
  font-size: clamp(12px, 2.5vw, 24px); /* More reliable responsive font size */
  min-height: 12px;
  pointer-events: all;
  position: relative;
  z-index: 100;
  padding: 0;
  margin: 0;
  -webkit-text-fill-color: #000000; /* Force black text on iOS/Safari */
}

.cell input:focus {
  outline: 2px solid rgba(0, 123, 255, 0.6);
  outline-offset: -2px;
  background-color: rgba(255, 255, 255, 0.3);
}

.cell.selected {
  border: 2px solid rgba(0, 123, 255, 0.4);
  background: rgba(173, 216, 230, 0.4); /* light blue with 40% opacity */
  z-index: 200; /* Bring selected cell to top */
}

.cell.blocked {
  pointer-events: none;
}

.cell.word-highlight {
  background-color: rgba(0, 123, 255, 0.1);
  z-index: 150; /* Bring highlighted word cells above others */
}

.cell.correct {
  color: #228b22;
}

.cell.incorrect {
  color: red;
}

/* Responsive styles */
@media (max-width: 1200px) {
  .controls {
    width: 90%;
    max-width: 83.33%; /* 10/12 of width */
  }
}

@media (max-width: 768px) {
  .controls {
    padding: 12px;
    gap: 8px;
  }

  .controls button {
    min-width: 120px;
    font-size: 14px;
    padding: 10px 12px;
  }
}

@media (max-width: 480px) {
  .controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 80%;
    gap: 8px;
  }

  .controls button {
    min-width: unset;
    width: 100%;
    font-size: 13px;
    padding: 8px 10px;
  }

  /* Last button spans full width if odd number of buttons */
  .controls button:last-child:nth-child(odd) {
    grid-column: 1 / -1;
  }
}

h1 {
  color: #000;
  text-align: center;
  margin-bottom: 30px;
}

.controls {
  position: relative;
  top: unset;
  left: unset;
  transform: none;
  width: 83.33%; /* 10/12 of width */
  margin: 0 auto 20px auto; /* Center and add space below */
  display: flex;
  justify-content: space-between;
  gap: 10px;
  background: rgba(255, 255, 255, 0.9);
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  z-index: 10;
  flex-wrap: wrap;
}

.controls button {
  flex: 1;
  min-width: 150px;
  padding: 12px 15px;
  font-size: 16px;
  white-space: nowrap;
  background-color: #c41e3a; /* Christmas red */
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.controls button:hover {
  background-color: #a01830;
  transform: translateY(-1px);
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
}

#check-button,
#check-solution-button {
  background-color: #146b3a; /* Christmas green */
}

#check-button:hover,
#check-solution-button:hover {
  background-color: #0f5028; /* Darker Christmas green */
}

#instructions-button {
  background-color: #165b33; /* Different shade of Christmas green */
}

#instructions-button:hover {
  background-color: #114426; /* Darker shade */
}

.controls button:disabled {
  background-color: #d9d9d9;
  color: #999;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* Zoom controls */
.zoom-controls {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.9);
  padding: 5px 10px;
  border-radius: 4px;
  border: 1px solid #ddd;
}

.zoom-controls button {
  width: 32px;
  height: 32px;
  min-width: 32px;
  flex: 0 0 auto;
  padding: 0;
  font-size: 20px;
  font-weight: bold;
  line-height: 1;
  background-color: #165b33;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.zoom-controls button:hover {
  background-color: #114426;
}

#zoom-level {
  min-width: 45px;
  text-align: center;
  font-size: 14px;
  font-weight: bold;
  color: #333;
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: white;
  border-radius: 16px;
  padding: 32px;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-header {
  margin-bottom: 24px;
  text-align: center;
}

.modal-header h2 {
  margin: 0;
  color: #1a1a1a;
  font-size: 24px;
  font-weight: 600;
}

.modal-header p {
  margin: 8px 0 0 0;
  color: #666;
  font-size: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #333;
  font-weight: 500;
  font-size: 14px;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e1e5e9;
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  box-sizing: border-box;
}

.form-group input:focus {
  outline: none;
  border-color: #146B3A;
  box-shadow: 0 0 0 3px rgba(20, 107, 58, 0.1);
}

.form-group input:invalid {
  border-color: #dc3545;
}

.modal-footer {
  display: flex;
  gap: 12px;
  margin-top: 32px;
}

.modal-footer button {
  flex: 1;
  padding: 14px 24px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-cancel {
  background: #f8f9fa;
  color: #495057;
}

.btn-cancel:hover {
  background: #e9ecef;
}

.btn-submit {
  background: #146B3A;
  color: white;
}

.btn-submit:hover {
  background: #125232;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(20, 107, 58, 0.3);
}

.btn-submit:disabled {
  background: #d9d9d9;
  color: #999;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.error-message {
  background: #f8d7da;
  color: #721c24;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 14px;
  display: none;
}

.error-message.show {
  display: block;
}

.success-message {
  background: #d4edda;
  color: #155724;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 14px;
  display: none;
}

.success-message.show {
  display: block;
}

@media (max-width: 480px) {
  .modal-content {
    padding: 24px;
    margin: 20px;
  }
  
  .modal-header h2 {
    font-size: 20px;
  }
  
  .modal-footer {
    flex-direction: column;
  }
}