/* Font for mathematical symbols */
@font-face {
  font-family: 'Symbola';
  src: url('https://cdn.jsdelivr.net/gh/jseidelin/symbola-font@master/Symbola.ttf') format('truetype');
  /* Improved Symbola font loading */
}

.calculator-button {
  background: linear-gradient(135deg, #96009b, #96009b);
  color: white !important;
  border: none;
  border-radius: 12px;
  padding: 8px 15px;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 0 #610064, 0 6px 15px rgba(0, 0, 0, 0.2);
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  margin: 0 5px;
}

.calculator-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #610064, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-button:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #610064, 0 3px 10px rgba(0, 0, 0, 0.2);
}

.calculator-modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.7);
  animation: fadeIn 0.3s ease-in-out;
}

.calculator-modal.closing {
  animation: fadeOut 0.3s ease-in-out;
}

.calculator-content {
  background-color: #141414;
  margin: 10% auto;
  padding: 20px;
  border: none;
  width: 80%;
  max-width: 600px;
  border-radius: 26px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
  color: white;
  animation: popOut 0.4s ease-out;
}

.calculator-modal.closing .calculator-content {
  animation: popIn 0.3s ease-in;
}

.calculator-header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-bottom: 15px;
}

.calculator-title {
  display: none;
}

.calculator-close {
  color: #aaa;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}

.calculator-close:hover {
  color: #fff;
}

.calculator-body {
  display: flex;
  flex-direction: column;
  gap: 15px;
  width: 100%;
}

.calculator-editor-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.calculator-latex-editor {
  width: 100%;
  min-height: 60px;
  padding: 10px;
  border: 1px solid #444;
  border-radius: 12px;
  background-color: #1e1e1e;
  font-size: 18px;
  color: white;
  box-sizing: border-box;
}

.calculator-result {
  width: 100%;
  min-height: 40px;
  padding: 10px;
  border: none;
  border-radius: 12px;
  background-color: #2a2a2a;
  font-size: 18px;
  color: white;
  overflow-x: auto;
  box-sizing: border-box;
}

/* Tab Navigation */
.calculator-tabs {
  display: flex;
  justify-content: space-between;
  border-bottom: none;
  margin-bottom: 8px;
}

.calculator-tabs-left {
  display: flex;
  gap: 10px;
}

.calculator-tabs-right {
  display: flex;
  align-items: center;
}

.calculator-tab-btn {
  background: #2a2a2a;
  color: white;
  border: none;
  border-radius: 16px;
  padding: 8px 15px;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.2);
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  margin: 0;
}

.calculator-tab-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #1a1a1a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-tab-btn.active {
  background: #4CAF50;
  box-shadow: 0 4px 0 #2b6e2f, 0 6px 15px rgba(0, 0, 0, 0.2);
}

.calculator-tab-btn.history-btn {
  background: #2a2a2a;
  box-shadow: 0 4px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.2);
}

.calculator-tab-btn.history-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #1a1a1a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-tab-btn.history-btn.active {
  background: #4CAF50;
  box-shadow: 0 4px 0 #2b6e2f, 0 6px 15px rgba(0, 0, 0, 0.2);
}

/* Sub-Tab Navigation */
.calculator-sub-tabs {
  display: flex;
  border-bottom: none;
  margin-bottom: 12px;
  margin-top: -10px;
  gap: 8px;
}

.calculator-sub-tab-btn {
  background: #2a2a2a;
  color: white;
  border: none;
  border-radius: 16px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 0 #1a1a1a, 0 4px 10px rgba(0, 0, 0, 0.2);
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  margin: 0;
}

.calculator-sub-tab-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.3);
}

.calculator-sub-tab-btn.active {
  background: #4CAF50;
  box-shadow: 0 3px 0 #2b6e2f, 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* Calculator Pages */
.calculator-pages {
  position: relative;
  min-height: 200px;
  width: 100%;
}

.calculator-page {
  display: none;
  width: 100%;
}

.calculator-page.active {
  display: block;
}

/* Calculator Sub-Pages */
.calculator-sub-page {
  display: none;
  width: 100%;
}

.calculator-sub-page.active {
  display: block;
}

/* Fixed Action Buttons */
.calculator-fixed-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 15px;
  gap: 15px;
}

.calculator-fixed-buttons button {
  flex: 1;
  margin: 0;
  padding: 12px 15px;
  font-size: 16px;
  font-weight: bold;
  border: none;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  background: #2a2a2a;
  color: white;
  box-shadow: 0 4px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.2);
}

.calculator-fixed-buttons button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #1a1a1a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-fixed-buttons button:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #1a1a1a, 0 3px 10px rgba(0, 0, 0, 0.2);
}

.calculator-fixed-buttons .equals-btn {
  background: #4CAF50;
  box-shadow: 0 4px 0 #2b6e2f, 0 6px 15px rgba(0, 0, 0, 0.2);
}

.calculator-fixed-buttons .equals-btn:hover {
  box-shadow: 0 6px 0 #2b6e2f, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-fixed-buttons .equals-btn:active {
  box-shadow: 0 2px 0 #388E3C, 0 3px 10px rgba(0, 0, 0, 0.2);
}

.calculator-fixed-buttons .clear-btn {
  background: #e32e01;
  box-shadow: 0 4px 0 #920000, 0 6px 15px rgba(0, 0, 0, 0.2);
}

.calculator-fixed-buttons .clear-btn:hover {
  box-shadow: 0 6px 0 #920000, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-fixed-buttons .clear-btn:active {
  box-shadow: 0 2px 0 #b71c1c, 0 3px 10px rgba(0, 0, 0, 0.2);
}

/* MathQuill specific styles */
.mq-editable-field {
  min-height: 40px !important;
  border: none !important;
  box-shadow: none !important;
  background: transparent !important;
  font-size: 18px !important;
  color: white !important;
}

.mq-math-mode {
  font-size: 18px !important;
  color: white !important;
}

.mq-focused {
  box-shadow: none !important;
  border: none !important;
  outline: none !important;
}

/* Change cursor color to white */
.mq-cursor {
  border-left: 1px solid white !important;
}

.mq-blink {
  animation: cursor-blink-white 1.02s infinite;
}

@keyframes cursor-blink-white {
  0% { opacity: 1; }
  50% { opacity: 0; }
  100% { opacity: 1; }
}

/* Make sure all MathQuill elements have white text */
.mq-root-block, 
.mq-math-mode .mq-root-block,
.mq-math-mode .mq-root-block.mq-focused,
.mq-editable-field .mq-root-block {
  color: white !important;
}

.mq-math-mode var, 
.mq-math-mode .mq-text-mode, 
.mq-math-mode .mq-nonSymbola {
  color: white !important;
}

/* Style the selection in MathQuill */
.mq-selection, 
.mq-selection .mq-non-leaf, 
.mq-selection .mq-scaled {
  background: #4d4d4d !important;
  color: white !important;
  border-color: #4d4d4d !important;
}

.error-message {
  color: #ff5252;
  padding: 10px;
  text-align: center;
}

/* Basic calculator page - fixed 4 columns */
.calculator-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  max-width: 100%;
  margin: 0 auto;
}

/* All non-basic pages - fill entire width with auto-sized buttons */
#functions-page .calculator-buttons,
#integral-page .calculator-buttons,
#advanced-page .calculator-buttons,
.calculator-sub-page .calculator-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  width: 100%;
  max-width: 100%;
  margin: 0;
  justify-content: flex-start;
}

/* Button styling for all buttons */
.calculator-buttons button {
  background: #2a2a2a;
  color: white;
  border: none;
  border-radius: 16px;
  padding: 8px 6px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.2);
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  font-family: 'Symbola', serif;
}

/* Button styling specifically for non-basic pages */
#functions-page .calculator-buttons button,
#integral-page .calculator-buttons button,
#advanced-page .calculator-buttons button,
.calculator-sub-page .calculator-buttons button {
  flex: 0 1 auto;
  min-width: 60px;
  margin: 0;
}

.calculator-buttons button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #1a1a1a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-buttons button:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #1a1a1a, 0 3px 10px rgba(0, 0, 0, 0.2);
}

/* Hide empty buttons */
.calculator-buttons .empty-btn {
  display: none;
}

/* Operator buttons (+, -, ×, ÷) */
.calculator-buttons .operator-btn {
  background: #3a2a1e;
  box-shadow: 0 4px 0 #2a1a0e, 0 6px 15px rgba(0, 0, 0, 0.2);
  font-family: 'Symbola', serif;
  font-weight: bold;
}

.calculator-buttons .operator-btn:hover {
  box-shadow: 0 6px 0 #2a1a0e, 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* Function buttons */
.calculator-buttons .function-btn {
  background: #1e3a4a;
  box-shadow: 0 4px 0 #0e2a3a, 0 6px 15px rgba(0, 0, 0, 0.2);
  font-family: 'Symbola', serif;
  font-weight: bold;
}

.calculator-buttons .function-btn:hover {
  box-shadow: 0 6px 0 #0e2a3a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* Special styling for the integral button */
.calculator-buttons button[data-insert="\\int"] {
  font-family: 'Symbola', serif;
  font-size: 18px;
  font-weight: bold;
  background: #2a2a2a;
  box-shadow: 0 4px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.2);
}

.calculator-buttons button[data-insert="\\int"]:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #1a1a1a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-buttons button[data-insert="\\int"]:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #1a1a1a, 0 3px 10px rgba(0, 0, 0, 0.2);
}

.calculator-buttons .integral-btn {
  position: relative;
  font-size: 20px;
  line-height: 1;
  background: #2a2a2a;
  box-shadow: 0 4px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.2);
  font-weight: bold;
}

.calculator-buttons .integral-btn:hover {
  box-shadow: 0 6px 0 #1a1a1a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-buttons .latex-btn {
  font-size: 18px;
  position: relative;
  background: #2a2a2a;
  box-shadow: 0 4px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.2);
  font-weight: bold;
}

.calculator-buttons .latex-btn:hover {
  box-shadow: 0 6px 0 #1a1a1a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-buttons .custom-integral-btn {
  position: relative;
  font-size: 24px;
  padding: 10px 15px;
  background: #2a2a2a;
  box-shadow: 0 4px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.2);
  font-weight: bold;
}

.calculator-buttons .custom-integral-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #1a1a1a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-buttons .custom-integral-btn:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #1a1a1a, 0 3px 10px rgba(0, 0, 0, 0.2);
}

.calculator-buttons .integral-symbol-btn {
  font-size: 28px;
  font-weight: bold;
  line-height: 1.2;
  padding: 6px 0;
  position: relative;
  text-align: center;
  background: #2a2a2a;
  box-shadow: 0 4px 0 #1a1a1a, 0 6px 15px rgba(0, 0, 0, 0.2);
}

.calculator-buttons .integral-symbol-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #1a1a1a, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-buttons .integral-symbol-btn:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #1a1a1a, 0 3px 10px rgba(0, 0, 0, 0.2);
}

/* Specific styling for the integral symbol */
.calculator-buttons .integral-symbol-btn .integral-symbol {
  font-family: 'Symbola', serif;
  font-size: 28px;
  display: inline-block;
}

.calculator-buttons .integral-symbol-btn sub {
  position: relative;
  font-size: 11px;
  bottom: 1px;
  left: -1px;
}

.calculator-buttons .integral-symbol-btn sup {
  position: relative;
  font-size: 11px;
  top: -3px;
  left: -4px;
}

/* Hide cursor in the result display */
.calculator-result .mq-cursor {
  display: none !important;
  opacity: 0 !important;
  visibility: hidden !important;
}

.calculator-result .mq-blink {
  animation: none !important;
}

/* Make sure all MathQuill elements have white text */
.mq-root-block, 
.mq-math-mode .mq-root-block,
.mq-math-mode .mq-root-block.mq-focused,
.mq-editable-field .mq-root-block {
  color: white !important;
}

.mq-math-mode var, 
.mq-math-mode .mq-text-mode, 
.mq-math-mode .mq-nonSymbola {
  color: white !important;
}

/* Responsive styles */
@media screen and (max-width: 768px) {
  .calculator-content {
    width: 95%;
    margin: 5% auto;
  }
  
  /* Basic page grid for mobile */
  .calculator-buttons {
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    max-width: 100%;
  }
  
  /* All non-basic pages for mobile */
  #functions-page .calculator-buttons,
  #integral-page .calculator-buttons,
  #advanced-page .calculator-buttons,
  .calculator-sub-page .calculator-buttons {
    gap: 4px;
    width: 100%;
  }
  
  /* Button sizing for non-basic pages on mobile */
  #functions-page .calculator-buttons button,
  #integral-page .calculator-buttons button,
  #advanced-page .calculator-buttons button,
  .calculator-sub-page .calculator-buttons button {
    min-width: 50px;
  }
  
  .calculator-buttons button {
    padding: 6px 4px;
    font-size: 14px;
  }
  
  .calculator-sub-tab-btn {
    padding: 4px 6px;
    font-size: 11px;
  }
}

.calculator-buttons .integral-symbol-btn {
  font-size: 28px;
  font-weight: bold;
  line-height: 1.2;
  padding: 6px 0;
  position: relative;
  text-align: center;
  background: linear-gradient(135deg, #8e2de2, #4a00e0);
  box-shadow: 0 4px 0 #5e00c2, 0 6px 15px rgba(0, 0, 0, 0.2);
}

.calculator-buttons .integral-symbol-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #5e00c2, 0 8px 20px rgba(0, 0, 0, 0.3);
}

.calculator-buttons .integral-symbol-btn:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #5e00c2, 0 3px 10px rgba(0, 0, 0, 0.2);
}

/* Specific styling for the integral symbol */
.calculator-buttons .integral-symbol-btn .integral-symbol {
  font-family: 'Symbola', serif;
  font-size: 28px;
  display: inline-block;
}

.calculator-buttons .integral-symbol-btn sub {
  position: relative;
  font-size: 11px;
  bottom: 1px;
  left: -1px;
}

.calculator-buttons .integral-symbol-btn sup {
  position: relative;
  font-size: 11px;
  top: -3px;
  left: -4px;
}

/* Hide cursor in the result display */
.calculator-result .mq-cursor {
  display: none !important;
  opacity: 0 !important;
  visibility: hidden !important;
}

.calculator-result .mq-blink {
  animation: none !important;
}

/* Make sure all MathQuill elements have white text */
.mq-root-block, 
.mq-math-mode .mq-root-block,
.mq-math-mode .mq-root-block.mq-focused,
.mq-editable-field .mq-root-block {
  color: white !important;
}

.mq-math-mode var, 
.mq-math-mode .mq-text-mode, 
.mq-math-mode .mq-nonSymbola {
  color: white !important;
}

.calculator-buttons .integral-btn sub {
  position: absolute;
  bottom: 2px;
  right: calc(50% - 10px);
  font-size: 12px;
}

.calculator-buttons .integral-btn sup {
  position: absolute;
  top: 2px;
  right: calc(50% - 10px);
  font-size: 12px;
}

.calculator-buttons .latex-btn .latex-content {
  display: inline-block;
  font-size: 20px;
  font-family: 'Symbola', serif;
}

.calculator-buttons .custom-integral-btn .integral-symbol {
  font-size: 24px;
  font-family: 'Symbola', serif;
}

.calculator-buttons .custom-integral-btn .integral-limits {
  position: relative;
  display: inline-block;
  height: 100%;
  margin-left: -5px;
}

.calculator-buttons .custom-integral-btn .upper-limit {
  position: absolute;
  top: -12px;
  right: 0;
  font-size: 14px;
}

.calculator-buttons .custom-integral-btn .lower-limit {
  position: absolute;
  bottom: -12px;
  right: 0;
  font-size: 14px;
}

/* Number buttons (0-9 and decimal) */
#basic-page .calculator-buttons button[data-insert="0"],
#basic-page .calculator-buttons button[data-insert="1"],
#basic-page .calculator-buttons button[data-insert="2"],
#basic-page .calculator-buttons button[data-insert="3"],
#basic-page .calculator-buttons button[data-insert="4"],
#basic-page .calculator-buttons button[data-insert="5"],
#basic-page .calculator-buttons button[data-insert="6"],
#basic-page .calculator-buttons button[data-insert="7"],
#basic-page .calculator-buttons button[data-insert="8"],
#basic-page .calculator-buttons button[data-insert="9"],
#basic-page .calculator-buttons button[data-insert="."] {
  background: #d8a200;
  box-shadow: 0 4px 0 #9c7500, 0 6px 15px rgba(0, 0, 0, 0.2);
}

#basic-page .calculator-buttons button[data-insert="0"]:hover,
#basic-page .calculator-buttons button[data-insert="1"]:hover,
#basic-page .calculator-buttons button[data-insert="2"]:hover,
#basic-page .calculator-buttons button[data-insert="3"]:hover,
#basic-page .calculator-buttons button[data-insert="4"]:hover,
#basic-page .calculator-buttons button[data-insert="5"]:hover,
#basic-page .calculator-buttons button[data-insert="6"]:hover,
#basic-page .calculator-buttons button[data-insert="7"]:hover,
#basic-page .calculator-buttons button[data-insert="8"]:hover,
#basic-page .calculator-buttons button[data-insert="9"]:hover,
#basic-page .calculator-buttons button[data-insert="."]:hover {
  box-shadow: 0 6px 0 #9c7500, 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* All other buttons on basic page (operators, π, ^, parentheses) */
#basic-page .calculator-buttons button:not([data-insert="0"]):not([data-insert="1"]):not([data-insert="2"]):not([data-insert="3"]):not([data-insert="4"]):not([data-insert="5"]):not([data-insert="6"]):not([data-insert="7"]):not([data-insert="8"]):not([data-insert="9"]):not([data-insert="."]):hover {
  box-shadow: 0 6px 0 #b30095, 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* Specific styles for +, -, ×, and ÷ buttons only */
#basic-page .calculator-buttons button[data-insert="+"],
#basic-page .calculator-buttons button[data-insert="-"],
#basic-page .calculator-buttons button[data-insert="\\cdot"],
#basic-page .calculator-buttons button[data-action="fraction"] {
  background: #e30050 !important; /* Reddish pink */
  box-shadow: 0 4px 0 #990036, 0 6px 15px rgba(0, 0, 0, 0.2) !important;
}

#basic-page .calculator-buttons button[data-insert="+"]:hover,
#basic-page .calculator-buttons button[data-insert="-"]:hover,
#basic-page .calculator-buttons button[data-insert="\\cdot"]:hover,
#basic-page .calculator-buttons button[data-action="fraction"]:hover {
  box-shadow: 0 6px 0 #990036, 0 8px 20px rgba(0, 0, 0, 0.3) !important;
}

/* Restore the hot pink color for π, ^, %, and ×10^n buttons */
#basic-page .calculator-buttons button[data-insert="\\pi"],
#basic-page .calculator-buttons button[data-insert="^"],
#basic-page .calculator-buttons button[data-action="percentage"],
#basic-page .calculator-buttons button[data-action="power-of-ten"] {
  background: #001db1 !important; /* Hot pink */
  box-shadow: 0 4px 0 #001477, 0 6px 15px rgba(0, 0, 0, 0.2) !important;
}

#basic-page .calculator-buttons button[data-insert="\\pi"]:hover,
#basic-page .calculator-buttons button[data-insert="^"]:hover,
#basic-page .calculator-buttons button[data-action="percentage"]:hover,
#basic-page .calculator-buttons button[data-action="power-of-ten"]:hover {
  box-shadow: 0 6px 0 #001477, 0 8px 20px rgba(0, 0, 0, 0.3) !important;
}

/* History Modal */
.history-overlay {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1100;
  animation: fadeIn 0.2s ease-in-out;
}

.history-overlay.closing {
  animation: fadeOut 0.2s ease-in-out;
}

.history-modal {
  display: none;
  position: fixed;
  /* Position will be set dynamically in JavaScript */
  width: 300px;
  max-height: 400px;
  background-color: #1e1e1e;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  z-index: 1101;
  overflow: hidden;
  animation: popOut 0.3s ease-out;
  transform-origin: top right;
}

.history-modal.closing {
  animation: popIn 0.2s ease-in;
}

/* Fix for calculator pages and buttons to remain visible when history is open */
.history-overlay[style*="display: block"] ~ .calculator-pages .calculator-page.active,
.history-overlay[style*="display: block"] ~ .calculator-pages .calculator-page.active .calculator-sub-page.active {
  display: block !important;
  pointer-events: none;
}

/* Fix for calculator buttons to remain visible when history is open */
.history-overlay[style*="display: block"] ~ .calculator-pages .calculator-page.active .calculator-buttons button,
.history-overlay[style*="display: block"] ~ .calculator-pages .calculator-page.active .calculator-sub-page.active .calculator-buttons button {
  display: inline-block !important;
  pointer-events: none;
}

/* Ensure calculator tabs remain visible but non-interactive when history is open */
.history-overlay[style*="display: block"] ~ .calculator-tabs,
.history-overlay[style*="display: block"] ~ .calculator-sub-tabs,
.history-overlay[style*="display: block"] ~ .calculator-fixed-buttons {
  pointer-events: none;
}

/* When history is closed, restore interaction */
.history-overlay[style*="display: none"] ~ .calculator-pages .calculator-page,
.history-overlay[style*="display: none"] ~ .calculator-pages .calculator-sub-page,
.history-overlay[style*="display: none"] ~ .calculator-tabs,
.history-overlay[style*="display: none"] ~ .calculator-sub-tabs,
.history-overlay[style*="display: none"] ~ .calculator-fixed-buttons,
.history-overlay:not([style*="display: block"]) ~ .calculator-pages .calculator-page,
.history-overlay:not([style*="display: block"]) ~ .calculator-pages .calculator-sub-page,
.history-overlay:not([style*="display: block"]) ~ .calculator-tabs,
.history-overlay:not([style*="display: block"]) ~ .calculator-sub-tabs,
.history-overlay:not([style*="display: block"]) ~ .calculator-fixed-buttons {
  pointer-events: auto;
}

@keyframes fadeIn {
  from { 
    opacity: 0;
    transform: scale(0.95);
  }
  to { 
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes fadeOut {
  from { 
    opacity: 1;
    transform: scale(1);
  }
  to { 
    opacity: 0;
    transform: scale(0.95);
  }
}

@keyframes popOut {
  0% { 
    opacity: 0;
    transform: scale(0.1);
    filter: blur(3px);
  }
  70% {
    opacity: 0.9;
    transform: scale(1.05);
    filter: blur(0);
  }
  100% { 
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
  }
}

@keyframes popIn {
  0% { 
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
  }
  30% {
    opacity: 0.9;
    transform: scale(0.9);
    filter: blur(0);
  }
  100% { 
    opacity: 0;
    transform: scale(0.1);
    filter: blur(3px);
  }
}

.history-content {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 15px;
  background-color: #2a2a2a;
  border-bottom: 1px solid #333;
}

.history-title {
  color: white;
  font-size: 16px;
  font-weight: bold;
}

.history-close {
  color: #aaa;
  font-size: 20px;
  font-weight: bold;
  cursor: pointer;
  transition: color 0.2s;
}

.history-close:hover {
  color: white;
}

.history-body {
  flex: 1;
  padding: 15px;
  overflow-y: auto;
  max-height: 300px;
}

.history-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.history-item {
  padding: 10px;
  border-bottom: 1px solid #333;
  color: white;
  cursor: pointer;
  transition: background-color 0.2s;
  user-select: none; /* Prevent text selection */
  -webkit-user-select: none; /* Safari */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* IE/Edge */
  pointer-events: auto !important; /* Ensure clickability */
}

.history-item * {
  user-select: none; /* Prevent text selection for all child elements */
  -webkit-user-select: none; /* Safari */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* IE/Edge */
  pointer-events: none; /* Make child elements non-interactive */
}

.history-item:last-child {
  border-bottom: none;
}

.history-item:hover {
  background-color: #2a2a2a;
}

.history-empty {
  color: #666;
  text-align: center;
  padding: 20px;
  font-style: italic;
}

.history-latex {
  display: block;
  width: 100%;
  overflow-x: auto;
  user-select: none; /* Prevent text selection */
  -webkit-user-select: none; /* Safari */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* IE/Edge */
  cursor: pointer; /* Show pointer cursor on hover */
  pointer-events: none; /* Make this element non-interactive */
}

.history-latex .mq-math-mode,
.history-latex .mq-math-mode * {
  color: white !important;
  user-select: none !important; /* Prevent text selection */
  -webkit-user-select: none !important; /* Safari */
  -moz-user-select: none !important; /* Firefox */
  -ms-user-select: none !important; /* IE/Edge */
  cursor: pointer; /* Show pointer cursor on hover */
  pointer-events: none !important; /* Make these elements non-interactive */
}

/* Mobile responsiveness for history modal */
@media (max-width: 600px) {
  .history-modal {
    width: 90%;
    right: 5%;
    left: auto;
    max-width: none;
  }
  
  .history-body {
    max-height: 250px;
  }
}

#basic-page .calculator-buttons button:not([data-insert="0"]):not([data-insert="1"]):not([data-insert="2"]):not([data-insert="3"]):not([data-insert="4"]):not([data-insert="5"]):not([data-insert="6"]):not([data-insert="7"]):not([data-insert="8"]):not([data-insert="9"]):not([data-insert="."]):hover {
  box-shadow: 0 6px 0 #b30095, 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* Fix for calculator pages and buttons to remain visible when history is open */
.history-overlay[style*="display: block"] ~ .calculator-pages .calculator-page.active,
.history-overlay[style*="display: block"] ~ .calculator-pages .calculator-page.active .calculator-sub-page.active {
  display: block !important;
  pointer-events: none;
}

/* When history is closed, restore proper page visibility */
.history-overlay:not([style*="display: block"]) ~ .calculator-pages .calculator-page:not(.active),
.history-overlay[style*="display: none"] ~ .calculator-pages .calculator-page:not(.active) {
  display: none !important;
}

.history-overlay:not([style*="display: block"]) ~ .calculator-pages .calculator-page.active,
.history-overlay[style*="display: none"] ~ .calculator-pages .calculator-page.active {
  display: block !important;
  pointer-events: auto;
}

/* Fix for history overlay interaction */
.history-overlay[style*="display: block"] ~ .calculator-pages .calculator-page,
.history-overlay[style*="display: block"] ~ .calculator-pages .calculator-sub-page {
  pointer-events: none;
}

#basic-page .calculator-buttons button:not([data-insert="0"]):not([data-insert="1"]):not([data-insert="2"]):not([data-insert="3"]):not([data-insert="4"]):not([data-insert="5"]):not([data-insert="6"]):not([data-insert="7"]):not([data-insert="8"]):not([data-insert="9"]):not([data-insert="."]):hover {
  box-shadow: 0 6px 0 #b30095, 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* Specific style for the parentheses button */
#basic-page .calculator-buttons button[data-insert="("] {
  background: #001db1 !important; /* Hot pink */
  box-shadow: 0 4px 0 #001477, 0 6px 15px rgba(0, 0, 0, 0.2) !important;
}

#basic-page .calculator-buttons button[data-insert="("]:hover {
  box-shadow: 0 6px 0 #001477, 0 8px 20px rgba(0, 0, 0, 0.3) !important;
}

.angle-mode-toggle {
  display: flex;
  margin-right: 10px;
  background: #333;
  border-radius: 16px;
  padding: 2px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2) inset;
}

.angle-mode-btn {
  background: #2a2a2a;
  color: white;
  border: none;
  border-radius: 14px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: bold;
  margin: 0;
  min-width: 40px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 0 #1a1a1a, 0 4px 10px rgba(0, 0, 0, 0.2);
}

.angle-mode-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 0 #1a1a1a, 0 5px 15px rgba(0, 0, 0, 0.3);
}

.angle-mode-btn.active {
  background: #4CAF50;
  box-shadow: 0 2px 0 #2b6e2f, 0 4px 10px rgba(0, 0, 0, 0.2);
}