/*
! tailwindcss v3.0.23 | MIT License | https://tailwindcss.com
*/

/*
1. Prevent padding and border from affecting element width. (https://github.com/mozdevs/cssremedy/issues/4)
2. Allow adding a border to an element by just adding a border-width. (https://github.com/tailwindcss/tailwindcss/pull/116)
*/

*,
::before,
::after {
  box-sizing: border-box;
  /* 1 */
  border-width: 0;
  /* 2 */
  border-style: solid;
  /* 2 */
  border-color: #e5e7eb;
  /* 2 */
}

::before,
::after {
  --tw-content: '';
}

/*
1. Use a consistent sensible line-height in all browsers.
2. Prevent adjustments of font size after orientation changes in iOS.
3. Use a more readable tab size.
4. Use the user's configured `sans` font-family by default.
*/

html {
  line-height: 1.5;
  /* 1 */
  -webkit-text-size-adjust: 100%;
  /* 2 */
  -moz-tab-size: 4;
  /* 3 */
  -o-tab-size: 4;
     tab-size: 4;
  /* 3 */
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  /* 4 */
}

/*
1. Remove the margin in all browsers.
2. Inherit line-height from `html` so users can set them as a class directly on the `html` element.
*/

body {
  margin: 0;
  /* 1 */
  line-height: inherit;
  /* 2 */
}

/*
1. Add the correct height in Firefox.
2. Correct the inheritance of border color in Firefox. (https://bugzilla.mozilla.org/show_bug.cgi?id=190655)
3. Ensure horizontal rules are visible by default.
*/

hr {
  height: 0;
  /* 1 */
  color: inherit;
  /* 2 */
  border-top-width: 1px;
  /* 3 */
}

/*
Add the correct text decoration in Chrome, Edge, and Safari.
*/

abbr:where([title]) {
  -webkit-text-decoration: underline dotted;
          text-decoration: underline dotted;
}

/*
Remove the default font size and weight for headings.
*/

h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: inherit;
  font-weight: inherit;
}

/*
Reset links to optimize for opt-in styling instead of opt-out.
*/

a {
  color: inherit;
  text-decoration: inherit;
}

/*
Add the correct font weight in Edge and Safari.
*/

b,
strong {
  font-weight: bolder;
}

/*
1. Use the user's configured `mono` font family by default.
2. Correct the odd `em` font sizing in all browsers.
*/

code,
kbd,
samp,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  /* 1 */
  font-size: 1em;
  /* 2 */
}

/*
Add the correct font size in all browsers.
*/

small {
  font-size: 80%;
}

/*
Prevent `sub` and `sup` elements from affecting the line height in all browsers.
*/

sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

/*
1. Remove text indentation from table contents in Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=999088, https://bugs.webkit.org/show_bug.cgi?id=201297)
2. Correct table border color inheritance in all Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=935729, https://bugs.webkit.org/show_bug.cgi?id=195016)
3. Remove gaps between table borders by default.
*/

table {
  text-indent: 0;
  /* 1 */
  border-color: inherit;
  /* 2 */
  border-collapse: collapse;
  /* 3 */
}

/*
1. Change the font styles in all browsers.
2. Remove the margin in Firefox and Safari.
3. Remove default padding in all browsers.
*/

button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  /* 1 */
  font-size: 100%;
  /* 1 */
  line-height: inherit;
  /* 1 */
  color: inherit;
  /* 1 */
  margin: 0;
  /* 2 */
  padding: 0;
  /* 3 */
}

/*
Remove the inheritance of text transform in Edge and Firefox.
*/

button,
select {
  text-transform: none;
}

/*
1. Correct the inability to style clickable types in iOS and Safari.
2. Remove default button styles.
*/

button,
[type='button'],
[type='reset'],
[type='submit'] {
  -webkit-appearance: button;
  /* 1 */
  background-color: transparent;
  /* 2 */
  background-image: none;
  /* 2 */
}

/*
Use the modern Firefox focus style for all focusable elements.
*/

:-moz-focusring {
  outline: auto;
}

/*
Remove the additional `:invalid` styles in Firefox. (https://github.com/mozilla/gecko-dev/blob/2f9eacd9d3d995c937b4251a5557d95d494c9be1/layout/style/res/forms.css#L728-L737)
*/

:-moz-ui-invalid {
  box-shadow: none;
}

/*
Add the correct vertical alignment in Chrome and Firefox.
*/

progress {
  vertical-align: baseline;
}

/*
Correct the cursor style of increment and decrement buttons in Safari.
*/

::-webkit-inner-spin-button,
::-webkit-outer-spin-button {
  height: auto;
}

/*
1. Correct the odd appearance in Chrome and Safari.
2. Correct the outline style in Safari.
*/

[type='search'] {
  -webkit-appearance: textfield;
  /* 1 */
  outline-offset: -2px;
  /* 2 */
}

/*
Remove the inner padding in Chrome and Safari on macOS.
*/

::-webkit-search-decoration {
  -webkit-appearance: none;
}

/*
1. Correct the inability to style clickable types in iOS and Safari.
2. Change font properties to `inherit` in Safari.
*/

::-webkit-file-upload-button {
  -webkit-appearance: button;
  /* 1 */
  font: inherit;
  /* 2 */
}

/*
Add the correct display in Chrome and Safari.
*/

summary {
  display: list-item;
}

/*
Removes the default spacing and border for appropriate elements.
*/

blockquote,
dl,
dd,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
figure,
p,
pre {
  margin: 0;
}

fieldset {
  margin: 0;
  padding: 0;
}

legend {
  padding: 0;
}

ol,
ul,
menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

/*
Prevent resizing textareas horizontally by default.
*/

textarea {
  resize: vertical;
}

/*
1. Reset the default placeholder opacity in Firefox. (https://github.com/tailwindlabs/tailwindcss/issues/3300)
2. Set the default placeholder color to the user's configured gray 400 color.
*/

input::-moz-placeholder, textarea::-moz-placeholder {
  opacity: 1;
  /* 1 */
  color: #9ca3af;
  /* 2 */
}

input:-ms-input-placeholder, textarea:-ms-input-placeholder {
  opacity: 1;
  /* 1 */
  color: #9ca3af;
  /* 2 */
}

input::placeholder,
textarea::placeholder {
  opacity: 1;
  /* 1 */
  color: #9ca3af;
  /* 2 */
}

/*
Set the default cursor for buttons.
*/

button,
[role="button"] {
  cursor: pointer;
}

/*
Make sure disabled buttons don't get the pointer cursor.
*/

:disabled {
  cursor: default;
}

/*
1. Make replaced elements `display: block` by default. (https://github.com/mozdevs/cssremedy/issues/14)
2. Add `vertical-align: middle` to align replaced elements more sensibly by default. (https://github.com/jensimmons/cssremedy/issues/14#issuecomment-634934210)
   This can trigger a poorly considered lint error in some tools but is included by design.
*/

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  /* 1 */
  vertical-align: middle;
  /* 2 */
}

/*
Constrain images and videos to the parent width and preserve their intrinsic aspect ratio. (https://github.com/mozdevs/cssremedy/issues/14)
*/

img,
video {
  max-width: 100%;
  height: auto;
}

/*
Ensure the default browser behavior of the `hidden` attribute.
*/

[hidden] {
  display: none;
}

*, ::before, ::after {
  --tw-translate-x: 0;
  --tw-translate-y: 0;
  --tw-rotate: 0;
  --tw-skew-x: 0;
  --tw-skew-y: 0;
  --tw-scale-x: 1;
  --tw-scale-y: 1;
  --tw-pan-x:  ;
  --tw-pan-y:  ;
  --tw-pinch-zoom:  ;
  --tw-scroll-snap-strictness: proximity;
  --tw-ordinal:  ;
  --tw-slashed-zero:  ;
  --tw-numeric-figure:  ;
  --tw-numeric-spacing:  ;
  --tw-numeric-fraction:  ;
  --tw-ring-inset:  ;
  --tw-ring-offset-width: 0px;
  --tw-ring-offset-color: #fff;
  --tw-ring-color: rgb(59 130 246 / 0.5);
  --tw-ring-offset-shadow: 0 0 #0000;
  --tw-ring-shadow: 0 0 #0000;
  --tw-shadow: 0 0 #0000;
  --tw-shadow-colored: 0 0 #0000;
  --tw-blur:  ;
  --tw-brightness:  ;
  --tw-contrast:  ;
  --tw-grayscale:  ;
  --tw-hue-rotate:  ;
  --tw-invert:  ;
  --tw-saturate:  ;
  --tw-sepia:  ;
  --tw-drop-shadow:  ;
  --tw-backdrop-blur:  ;
  --tw-backdrop-brightness:  ;
  --tw-backdrop-contrast:  ;
  --tw-backdrop-grayscale:  ;
  --tw-backdrop-hue-rotate:  ;
  --tw-backdrop-invert:  ;
  --tw-backdrop-opacity:  ;
  --tw-backdrop-saturate:  ;
  --tw-backdrop-sepia:  ;
}

.my-2 {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.flex {
  display: flex;
}

.grid {
  display: grid;
}

.min-h-screen {
  min-height: 100vh;
}

.w-screen {
  width: 100vw;
}

.w-full {
  width: 100%;
}

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-cols-5 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.items-center {
  align-items: center;
}

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

.gap-4 {
  gap: 1rem;
}

.rounded-xl {
  border-radius: 0.75rem;
}

.rounded {
  border-radius: 0.25rem;
}

.border-4 {
  border-width: 4px;
}

.border-black {
  --tw-border-opacity: 1;
  border-color: rgb(0 0 0 / var(--tw-border-opacity));
}

.bg-red-200 {
  --tw-bg-opacity: 1;
  background-color: rgb(254 202 202 / var(--tw-bg-opacity));
}

.bg-rose-300 {
  --tw-bg-opacity: 1;
  background-color: rgb(253 164 175 / var(--tw-bg-opacity));
}

.bg-rose-400 {
  --tw-bg-opacity: 1;
  background-color: rgb(251 113 133 / var(--tw-bg-opacity));
}

.p-2 {
  padding: 0.5rem;
}

.text-2xl {
  font-size: 1.5rem;
  line-height: 2rem;
}

.text-xl {
  font-size: 1.25rem;
  line-height: 1.75rem;
}

.text-base {
  font-size: 1rem;
  line-height: 1.5rem;
}

.p-3 {
  padding: 0.75rem;
}

.p-4 {
  padding: 1rem;
}

.p-5 {
  padding: 1.25rem;
}

.p-6 {
  padding: 1.5rem;
}

.gap-2 {
  gap: 0.5rem;
}

.gap-3 {
  gap: 0.75rem;
}

.max-w-sm {
  max-width: 24rem;
}

.max-w-md {
  max-width: 28rem;
}

.max-w-lg {
  max-width: 32rem;
}

.rounded-lg {
  border-radius: 0.5rem;
}

.overflow-hidden {
  overflow: hidden;
}

.shadow-2xl {
  --tw-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --tw-shadow-colored: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
}

.shadow-md {
  --tw-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --tw-shadow-colored: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
}

.font-semibold {
  font-weight: 600;
}

.text-right {
  text-align: right;
}

.focus\:outline-none:focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
}

.bg-gray-100 {
  --tw-bg-opacity: 1;
  background-color: rgb(243 244 246 / var(--tw-bg-opacity));
}

.transition-colors {
  transition-property: color, background-color, border-color, text-decoration-color, fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

.hover\:bg-rose-300:hover {
  --tw-bg-opacity: 1;
  background-color: rgb(253 164 175 / var(--tw-bg-opacity));
}

.active\:bg-rose-500:active {
  --tw-bg-opacity: 1;
  background-color: rgb(244 63 94 / var(--tw-bg-opacity));
}

.active\:shadow-sm:active {
  --tw-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --tw-shadow-colored: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
}

@media (min-width: 640px) {
  .sm\:max-w-md {
    max-width: 28rem;
  }

  .sm\:p-4 {
    padding: 1rem;
  }

  .sm\:p-6 {
    padding: 1.5rem;
  }

  .sm\:gap-3 {
    gap: 0.75rem;
  }

  .sm\:text-lg {
    font-size: 1.125rem;
    line-height: 1.75rem;
  }

  .sm\:text-2xl {
    font-size: 1.5rem;
    line-height: 2rem;
  }
}

@media (min-width: 768px) {
  .md\:max-w-lg {
    max-width: 32rem;
  }

  .md\:p-5 {
    padding: 1.25rem;
  }

  .md\:p-4 {
    padding: 1rem;
  }

  .md\:gap-4 {
    gap: 1rem;
  }

  .md\:text-xl {
    font-size: 1.25rem;
    line-height: 1.75rem;
  }

  .md\:text-3xl {
    font-size: 1.875rem;
    line-height: 2.25rem;
  }
}

/* Calculator Wrapper */
.calculator-wrapper {
  width: 100%;
  max-width: 24rem;
}

@media (min-width: 640px) {
  .calculator-wrapper {
    max-width: 28rem;
  }
}

@media (min-width: 768px) {
  .calculator-wrapper {
    max-width: 32rem;
  }
}

/* Calculator Header */
.calculator-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding: 0 0.5rem;
}

.calculator-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  color: #1f2937;
}

.calculator-controls {
  display: flex;
  gap: 0.5rem;
}

.control-btn {
  background: rgba(251, 113, 133, 0.8);
  border: 2px solid #000;
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-size: 1.25rem;
  transition: all 0.2s;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.control-btn:hover {
  background: rgba(251, 113, 133, 1);
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
}

.control-btn:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.control-btn:focus {
  outline: 3px solid #3b82f6;
  outline-offset: 2px;
}

/* Calculator Container */
.calculator-container {
  background: white;
}

.calculator-display {
  border: none;
  border-bottom: 2px solid #000;
}

.calculator-display.error {
  background-color: #fee2e2;
  color: #dc2626;
  animation: shake 0.3s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.calculator-display:focus {
  outline: 3px solid #3b82f6;
  outline-offset: -3px;
}

/* Calculator Buttons */
.calc-btn {
  border: 2px solid #000;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.calc-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
}

.calc-btn:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.calc-btn:focus {
  outline: 3px solid #3b82f6;
  outline-offset: 2px;
  z-index: 10;
}

.number-btn {
  background-color: rgb(251 113 133);
}

.number-btn:hover {
  background-color: rgb(253 164 175);
}

.operator-btn {
  background-color: rgb(251 113 133);
}

.operator-btn:hover {
  background-color: rgb(253 164 175);
}

.equals-btn {
  background-color: rgb(251 113 133);
  font-weight: 700;
}

.equals-btn:hover {
  background-color: rgb(253 164 175);
}

.memory-btn {
  background-color: rgb(147 197 253);
  font-size: 0.875rem;
}

.memory-btn:hover {
  background-color: rgb(96 165 250);
}

.scientific-btn {
  background-color: rgb(196 181 253);
}

.scientific-btn:hover {
  background-color: rgb(167 139 250);
}

.constant-btn {
  background-color: rgb(253 224 71);
}

.constant-btn:hover {
  background-color: rgb(250 204 21);
}

/* History Container */
.history-container {
  margin-top: 1rem;
  background: white;
  border: 2px solid #000;
  border-radius: 0.5rem;
  padding: 1rem;
  max-height: 300px;
  overflow-y: auto;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.history-container.hidden {
  display: none;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #e5e7eb;
}

.history-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: #1f2937;
}

.clear-history-btn {
  background: rgba(239, 68, 68, 0.8);
  border: 2px solid #000;
  border-radius: 0.375rem;
  padding: 0.375rem 0.75rem;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.2s;
}

.clear-history-btn:hover {
  background: rgba(239, 68, 68, 1);
  transform: translateY(-1px);
}

.clear-history-btn:focus {
  outline: 3px solid #3b82f6;
  outline-offset: 2px;
}

.history-item {
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.2s;
}

.history-item:hover {
  background: #f3f4f6;
  border-color: #d1d5db;
  transform: translateX(4px);
}

.history-item:focus {
  outline: 3px solid #3b82f6;
  outline-offset: 2px;
}

.history-expression {
  font-size: 0.875rem;
  color: #6b7280;
  margin-bottom: 0.25rem;
}

.history-result {
  font-size: 1rem;
  font-weight: 600;
  color: #1f2937;
}

.history-empty {
  text-align: center;
  color: #9ca3af;
  padding: 2rem;
  margin: 0;
}

/* Dark Mode */
[data-theme="dark"] {
  --bg-primary: #1f2937;
  --bg-secondary: #374151;
  --bg-tertiary: #4b5563;
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --border-color: #6b7280;
}

[data-theme="dark"] body {
  background-color: var(--bg-primary);
}

[data-theme="dark"] .calculator-title {
  color: var(--text-primary);
}

[data-theme="dark"] .calculator-container {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .calculator-display {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-bottom-color: var(--border-color);
}

[data-theme="dark"] .calculator-display.error {
  background-color: #7f1d1d;
  color: #fca5a5;
}

[data-theme="dark"] .calculator-buttons {
  background-color: var(--bg-secondary);
}

[data-theme="dark"] .calc-btn {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

[data-theme="dark"] .calc-btn:hover {
  background-color: #6b7280;
}

[data-theme="dark"] .memory-btn {
  background-color: #1e40af;
  color: var(--text-primary);
}

[data-theme="dark"] .memory-btn:hover {
  background-color: #1e3a8a;
}

[data-theme="dark"] .scientific-btn {
  background-color: #5b21b6;
  color: var(--text-primary);
}

[data-theme="dark"] .scientific-btn:hover {
  background-color: #4c1d95;
}

[data-theme="dark"] .constant-btn {
  background-color: #854d0e;
  color: var(--text-primary);
}

[data-theme="dark"] .constant-btn:hover {
  background-color: #713f12;
}


[data-theme="dark"] .control-btn {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
  color: var(--text-primary);
}

[data-theme="dark"] .control-btn:hover {
  background-color: #6b7280;
}

[data-theme="dark"] .history-container {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .history-header {
  border-bottom-color: var(--border-color);
}

[data-theme="dark"] .history-header h2 {
  color: var(--text-primary);
}

[data-theme="dark"] .history-item {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
}

[data-theme="dark"] .history-item:hover {
  background: #6b7280;
}

[data-theme="dark"] .history-expression {
  color: var(--text-secondary);
}

[data-theme="dark"] .history-result {
  color: var(--text-primary);
}

[data-theme="dark"] .history-empty {
  color: var(--text-secondary);
}

/* Scrollbar styling for history */
.history-container::-webkit-scrollbar {
  width: 8px;
}

.history-container::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 4px;
}

[data-theme="dark"] .history-container::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}

.history-container::-webkit-scrollbar-thumb {
  background: #888;
  border-radius: 4px;
}

.history-container::-webkit-scrollbar-thumb:hover {
  background: #555;
}