/* Material Design CSS Custom Properties */
:root {
  /* Material Design 3 Color Tokens - Light Theme */
  --md-sys-color-primary: #6750a4;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #eaddff;
  --md-sys-color-on-primary-container: #21005d;
  --md-sys-color-secondary: #625b71;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-secondary-container: #e8def8;
  --md-sys-color-on-secondary-container: #1d192b;
  --md-sys-color-surface: #fef7ff;
  --md-sys-color-on-surface: #1c1b1f;
  --md-sys-color-surface-variant: #e7e0ec;
  --md-sys-color-on-surface-variant: #49454f;
  --md-sys-color-outline: #79747e;
  --md-sys-color-outline-variant: #cab6e6;
  --md-sys-color-background: #fef7ff;
  --md-sys-color-on-background: #1c1b1f;
  --md-sys-color-surface-container: #f3edf7;
  --md-sys-color-surface-container-high: #ede6f0;
  --md-sys-color-surface-container-highest: #e6e0e9;
  
  /* Material Design Elevation Shadows */
  --md-sys-elevation-level0: none;
  --md-sys-elevation-level1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level2: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level3: 0px 1px 3px 0px rgba(0, 0, 0, 0.3), 0px 4px 8px 3px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level4: 0px 2px 3px 0px rgba(0, 0, 0, 0.3), 0px 6px 10px 4px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level5: 0px 4px 4px 0px rgba(0, 0, 0, 0.3), 0px 8px 12px 6px rgba(0, 0, 0, 0.15);
  
  /* Material Design Shape Tokens */
  --md-sys-shape-corner-none: 0px;
  --md-sys-shape-corner-extra-small: 4px;
  --md-sys-shape-corner-small: 8px;
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-large: 16px;
  --md-sys-shape-corner-extra-large: 28px;
  
  /* Material Typography */
  --md-sys-typescale-display-large-font: 400 57px/64px 'Roboto', sans-serif;
  --md-sys-typescale-headline-large-font: 400 32px/40px 'Roboto', sans-serif;
  --md-sys-typescale-headline-medium-font: 400 28px/36px 'Roboto', sans-serif;
  --md-sys-typescale-title-large-font: 400 22px/28px 'Roboto', sans-serif;
  --md-sys-typescale-title-medium-font: 500 16px/24px 'Roboto', sans-serif;
  --md-sys-typescale-body-large-font: 400 16px/24px 'Roboto', sans-serif;
  --md-sys-typescale-body-medium-font: 400 14px/20px 'Roboto', sans-serif;
  --md-sys-typescale-label-large-font: 500 14px/20px 'Roboto', sans-serif;
  --md-sys-typescale-label-medium-font: 500 12px/16px 'Roboto', sans-serif;
}

[data-theme="dark"] {
  /* Material Design 3 Color Tokens - Dark Theme */
  --md-sys-color-primary: #d0bcff;
  --md-sys-color-on-primary: #381e72;
  --md-sys-color-primary-container: #4f378b;
  --md-sys-color-on-primary-container: #eaddff;
  --md-sys-color-secondary: #ccc2dc;
  --md-sys-color-on-secondary: #332d41;
  --md-sys-color-secondary-container: #4a4458;
  --md-sys-color-on-secondary-container: #e8def8;
  --md-sys-color-surface: #141218;
  --md-sys-color-on-surface: #e6e0e9;
  --md-sys-color-surface-variant: #49454f;
  --md-sys-color-on-surface-variant: #cab6e6;
  --md-sys-color-outline: #938f96;
  --md-sys-color-outline-variant: #49454f;
  --md-sys-color-background: #141218;
  --md-sys-color-on-background: #e6e0e9;
  --md-sys-color-surface-container: #211f26;
  --md-sys-color-surface-container-high: #2b2930;
  --md-sys-color-surface-container-highest: #36343b;
  
  /* Dark theme elevation shadows are more subtle */
  --md-sys-elevation-level1: 0px 1px 2px 0px rgba(0, 0, 0, 0.6), 0px 1px 3px 1px rgba(0, 0, 0, 0.3);
  --md-sys-elevation-level2: 0px 1px 2px 0px rgba(0, 0, 0, 0.6), 0px 2px 6px 2px rgba(0, 0, 0, 0.3);
  --md-sys-elevation-level3: 0px 1px 3px 0px rgba(0, 0, 0, 0.6), 0px 4px 8px 3px rgba(0, 0, 0, 0.3);
  --md-sys-elevation-level4: 0px 2px 3px 0px rgba(0, 0, 0, 0.6), 0px 6px 10px 4px rgba(0, 0, 0, 0.3);
  --md-sys-elevation-level5: 0px 4px 4px 0px rgba(0, 0, 0, 0.6), 0px 8px 12px 6px rgba(0, 0, 0, 0.3);
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body { 
  font: var(--md-sys-typescale-body-large-font);
  padding: 24px 16px;
  max-width: 1200px;
  margin: 0 auto;
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
              color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 100vh;
}

/* Material Design Typography */
h1 { 
  font: var(--md-sys-typescale-headline-large-font);
  margin: 0 0 32px 0;
  text-align: center;
  color: var(--md-sys-color-primary);
  letter-spacing: 0;
}

label {
  font: var(--md-sys-typescale-label-large-font);
  color: var(--md-sys-color-on-surface-variant);
  display: block;
  margin-bottom: 8px;
}

/* Material Design Layout Components */
.controls-container {
  background: var(--md-sys-color-surface-container-high);
  padding: 24px;
  border-radius: var(--md-sys-shape-corner-large);
  margin-bottom: 24px;
  box-shadow: var(--md-sys-elevation-level2);
  border: 1px solid var(--md-sys-color-outline-variant);
  transition: box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.controls { 
  display: flex; 
  align-items: center; 
  gap: 16px;
  margin-bottom: 20px;
}

.controls:last-child {
  margin-bottom: 0;
}

.controls label {
  margin: 0;
  white-space: nowrap;
  min-width: fit-content;
}

.svg-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 300px;
  margin-bottom: 24px;
  background: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-large);
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: var(--md-sys-elevation-level1);
  overflow: hidden;
  transition: box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.svg-container:hover {
  box-shadow: var(--md-sys-elevation-level2);
}

.svg-container svg { 
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  box-shadow: none;
  margin: 0;
}

/* Material Design SVG Display Styles */
svg { 
  border: 2px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  display: block;
  margin: 0;
  max-width: 100%;
  height: auto;
  box-shadow: var(--md-sys-elevation-level1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

svg:hover {
  box-shadow: var(--md-sys-elevation-level2);
  border-color: var(--md-sys-color-outline);
}

/* Material Design Form Elements */
input, button, select { 
  font: var(--md-sys-typescale-body-large-font);
  border-radius: var(--md-sys-shape-corner-small);
  border: 1px solid var(--md-sys-color-outline);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  outline: none;
}

input[type="text"], select {
  padding: 16px;
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface);
  min-height: 56px;
  border: 1px solid var(--md-sys-color-outline);
}

input[type="text"]:focus, select:focus {
  border-color: var(--md-sys-color-primary);
  border-width: 2px;
  padding: 15px; /* Compensate for thicker border */
  box-shadow: none;
}

input[type="text"]:hover, select:hover {
  border-color: var(--md-sys-color-on-surface);
}

/* Material Design Checkbox - Dark Mode Toggle */
input[type="checkbox"] {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-extra-small);
  background-color: var(--md-sys-color-surface-container-highest);
  cursor: pointer;
  position: relative;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

input[type="checkbox"]:checked {
  background-color: var(--md-sys-color-primary);
  border-color: var(--md-sys-color-primary);
}

input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--md-sys-color-on-primary);
  font-size: 12px;
  font-weight: bold;
}

input[type="checkbox"]:hover {
  border-color: var(--md-sys-color-primary);
}

/* Material Design Range Input Styles */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--md-sys-color-outline-variant);
  border-radius: 2px;
  outline: none;
  margin: 0;
  cursor: pointer;
  border: none;
  min-width: 200px;
}

input[type="range"]::-webkit-slider-track {
  height: 4px;
  background: var(--md-sys-color-outline-variant);
  border-radius: 2px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--md-sys-color-primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--md-sys-elevation-level1);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
}

input[type="range"]::-webkit-slider-thumb:hover {
  background: var(--md-sys-color-primary);
  transform: scale(1.2);
  box-shadow: var(--md-sys-elevation-level2);
}

input[type="range"]::-webkit-slider-thumb:active {
  transform: scale(1.4);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--md-sys-color-primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: var(--md-sys-elevation-level1);
}

input[type="range"]::-moz-range-track {
  background: var(--md-sys-color-outline-variant);
  height: 4px;
  border-radius: 2px;
  border: none;
}

/* Material Design Button Styles */
button {
  font: var(--md-sys-typescale-label-large-font);
  padding: 16px 24px;
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border: none;
  cursor: pointer;
  box-shadow: var(--md-sys-elevation-level1);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--md-sys-shape-corner-large);
  min-height: 40px;
  letter-spacing: 0.1px;
  text-transform: none;
  position: relative;
  overflow: hidden;
}

button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: inherit;
}

button:hover::before {
  opacity: 0.08;
}

button:focus::before {
  opacity: 0.12;
}

button:active::before {
  opacity: 0.16;
}

button:hover {
  box-shadow: var(--md-sys-elevation-level2);
}

button:active {
  box-shadow: var(--md-sys-elevation-level1);
}

#download {
  width: 100%;
  padding: 20px 24px;
  font: var(--md-sys-typescale-title-medium-font);
  margin-top: 16px;
  min-height: 56px;
  border-radius: var(--md-sys-shape-corner-large);
}

/* Download Section Styles */
.download-section {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
}

.export-size-control {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--md-sys-color-surface-container-high);
  padding: 12px 16px;
  border-radius: var(--md-sys-shape-corner-medium);
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: var(--md-sys-elevation-level1);
}

.export-size-control label {
  font: var(--md-sys-typescale-label-medium-font);
  color: var(--md-sys-color-on-surface-variant);
  margin: 0;
  white-space: nowrap;
}

.export-size-control input[type="number"] {
  width: 80px;
  padding: 8px 12px;
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-small);
  font: var(--md-sys-typescale-body-medium-font);
  min-height: auto;
  text-align: center;
}

.export-size-control input[type="number"]:focus {
  border-color: var(--md-sys-color-primary);
  border-width: 2px;
  padding: 7px 11px; /* Compensate for thicker border */
}

.export-size-control span {
  font: var(--md-sys-typescale-label-medium-font);
  color: var(--md-sys-color-on-surface-variant);
  min-width: auto;
}

#download {
  flex: 1;
  margin-top: 0;
}

/* Material Design Accessibility */
input:focus-visible, button:focus-visible, select:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

/* Material Design Responsive Design */
@media (max-width: 768px) {
  body {
    padding: 16px 8px;
  }
  
  .controls-container {
    padding: 16px;
  }
  
  .controls {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .controls label {
    white-space: normal;
    margin-bottom: 4px;
  }
  
  h1 {
    font: var(--md-sys-typescale-headline-medium-font);
    margin-bottom: 24px;
  }
  
  input[type="range"] {
    min-width: unset;
    width: 100%;
  }
  
  .color-palette {
    padding: 16px;
  }
  
  .color-swatches {
    gap: 12px;
  }
  
  .color-swatch {
    min-width: 70px;
  }
  
  .color-sample {
    width: 50px;
    height: 50px;
  }
}

@media (max-width: 480px) {
  .svg-container {
    min-height: 200px;
  }
  
  h1 {
    font: var(--md-sys-typescale-title-large-font);
  }
  
  .controls-container {
    padding: 12px;
  }
  
  .color-palette {
    padding: 12px;
  }
  
  .color-swatches {
    gap: 8px;
  }
  
  .color-swatch {
    min-width: 60px;
  }
  
  .color-sample {
    width: 40px;
    height: 40px;
  }
  
  .color-code {
    font-size: 10px;
    padding: 2px 4px;
  }
}

/* Advanced SVG Editor Styles */

/* Enhanced color picker styling */
input[type="color"] {
  width: 50px;
  height: 40px;
  border: 2px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-small);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  background: none;
  padding: 0;
}

input[type="color"]:hover {
  border-color: var(--md-sys-color-primary);
  box-shadow: var(--md-sys-elevation-level2);
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
  border: none;
  border-radius: var(--md-sys-shape-corner-extra-small);
}

input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: var(--md-sys-shape-corner-extra-small);
}

/* Range input value display */
.controls span {
  font: var(--md-sys-typescale-label-medium-font);
  color: var(--md-sys-color-primary);
  min-width: 40px;
  text-align: center;
  font-weight: 500;
}

/* Loading state for SVG container */
.svg-container.loading {
  opacity: 0.6;
  pointer-events: none;
}

.svg-container.loading::after {
  content: 'Loading...';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-large-font);
}

/* Material Design Responsive Design */
@media (max-width: 768px) {
  body {
    padding: 16px 8px;
  }
  
  .controls-container {
    padding: 16px;
  }
  
  .controls {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .controls label {
    white-space: normal;
    margin-bottom: 4px;
  }
  
  h1 {
    font: var(--md-sys-typescale-headline-medium-font);
    margin-bottom: 24px;
  }
  
  input[type="range"] {
    min-width: unset;
    width: 100%;
  }
  
  input[type="color"] {
    width: 40px;
    height: 35px;
  }
  
  .controls span {
    min-width: 35px;
    font-size: 11px;
  }
  
  .download-section {
    flex-direction: column;
    gap: 12px;
  }
  
  .export-size-control {
    align-self: stretch;
    justify-content: center;
  }
  
  #download {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .svg-container {
    min-height: 200px;
  }
  
  h1 {
    font: var(--md-sys-typescale-title-large-font);
  }
  
  .controls-container {
    padding: 12px;
  }
  
  input[type="color"] {
    width: 35px;
    height: 30px;
  }
  
  .controls span {
    min-width: 30px;
    font-size: 10px;
  }
  
  .download-section {
    flex-direction: column;
    gap: 8px;
  }
  
  .export-size-control {
    padding: 8px 12px;
  }
  
  .export-size-control input[type="number"] {
    width: 70px;
    padding: 6px 8px;
  }
}

/* Material Design Utility Classes */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Material Design State Layers for Interactive Elements */
.controls-container:hover {
  box-shadow: var(--md-sys-elevation-level3);
}

/* Material Design Motion */
* {
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}