#accessibility-btn {
  position: fixed !important;
  top: 20px;
  right: 20px;
  width: 60px;
  height: 60px;
  background-color: #ffffff !important;
  border-radius: 50% !important;
  border: none;
  padding: 0;
  z-index: 99999 !important;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease;
}

#accessibility-btn:hover {
  transform: scale(1.08);
}

#accessibility-btn:focus {
  outline: 3px solid #0056b3;
  outline-offset: 4px;
}

#accessibility-btn svg {
  width: 36px;
  height: 36px;
  fill: #007BFF;
}

#accessibility-panel {
  position: fixed !important;
  top: 90px !important;
  right: 20px !important;
  background: #ffffff !important;
  border: 1px solid #ccc !important;
  border-radius: 8px !important;
  padding: 10px !important;
  z-index: 100000 !important;
  display: none;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2) !important;
  max-width: 220px;
  direction: rtl;
}

#accessibility-panel.show {
  display: block !important;
}

#accessibility-panel button {
  display: block;
  width: 100%;
  margin: 5px 0;
  padding: 8px 10px;
  font-size: 14px;
  background-color: #f2f2f2;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.3s;
}

#accessibility-panel button:hover {
  background-color: #ddd;
}

.invert-colors {
  filter: invert(1) hue-rotate(180deg);
}

.grayscale {
  filter: grayscale(1);
}

.underline-links a {
  text-decoration: underline !important;
}

body.grayscale #accessibility-btn,
body.grayscale #accessibility-panel {
  filter: none !important;
  position: fixed !important;
  transform: none !important;
  backface-visibility: hidden;
  will-change: transform;
}