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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: #333;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.container {
  max-width: 100vw;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

header {
  background: rgba(255, 255, 255, 0.95);
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #2c3e50;
  font-size: 2.5rem;
  font-weight: 300;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

label {
  font-weight: 500;
  color: #555;
}

select,
input[type="range"] {
  padding: 8px 12px;
  border: 2px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.3s ease;
}

select:focus,
input[type="range"]:focus {
  outline: none;
  border-color: #667eea;
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
}

.btn-secondary {
  background: #f8f9fa;
  color: #495057;
  border: 2px solid #dee2e6;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

main {
  display: flex;
  justify-content: center;
  align-items: center;
  flex: 1;
}

.grid-container {
  background: rgba(255, 255, 255, 0.95);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  overflow: auto;
  max-height: calc(100vh - 300px);
  max-width: 90vw;
}

.grid {
  display: grid;
  gap: 1px;
  background-color: #ccc;
  border: 2px solid #999;
  transition: transform 0.3s ease;
  user-select: none;
}

.cell {
  background-color: #fff;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.cell:hover {
  background-color: #e3f2fd;
  transform: scale(1.05);
  z-index: 1;
}

.cell.active {
  background-color: #667eea;
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.cell.active:hover {
  background: linear-gradient(135deg, #5a6fd8, #6a4190);
}

.info-panel {
  background: rgba(255, 255, 255, 0.95);
  padding: 15px;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
}

.pattern-info {
  display: flex;
  justify-content: center;
  gap: 30px;
  font-weight: 500;
  color: #555;
}

#zoomValue {
  min-width: 45px;
  text-align: center;
  font-weight: 500;
  color: #667eea;
}

@media (max-width: 768px) {
  .container {
    padding: 10px;
  }

  h1 {
    font-size: 2rem;
  }

  .controls {
    flex-direction: column;
    gap: 15px;
  }

  .control-group {
    justify-content: center;
  }

  .pattern-info {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .grid-container {
    padding: 15px;
    max-width: 95vw;
  }
}

@keyframes gridChange {
  0% {
    opacity: 0.7;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.grid.changing {
  animation: gridChange 0.3s ease;
}

body.dragging .cell {
  cursor: crosshair;
}

body.dragging {
  cursor: crosshair;
}