:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(252, 252, 249, 1);
  --color-cream-100: rgba(255, 255, 253, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98, 108, 113, 1);
  --color-brown-600: rgba(94, 82, 64, 1);
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  --color-teal-300: rgba(50, 184, 198, 1);
  --color-teal-400: rgba(45, 166, 178, 1);
  --color-teal-500: rgba(33, 128, 141, 1);
  --color-teal-600: rgba(29, 116, 128, 1);
  --color-teal-700: rgba(26, 104, 115, 1);
  --color-teal-800: rgba(41, 150, 161, 1);
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(59, 130, 246, 0.08); /* Light blue */
  --color-bg-2: rgba(245, 158, 11, 0.08); /* Light yellow */
  --color-bg-3: rgba(34, 197, 94, 0.08); /* Light green */
  --color-bg-4: rgba(239, 68, 68, 0.08); /* Light red */
  --color-bg-5: rgba(147, 51, 234, 0.08); /* Light purple */
  --color-bg-6: rgba(249, 115, 22, 0.08); /* Light orange */
  --color-bg-7: rgba(236, 72, 153, 0.08); /* Light pink */
  --color-bg-8: rgba(6, 182, 212, 0.08); /* Light cyan */

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-family-malayalam: "Noto Sans Malayalam", sans-serif;
  --font-family-kannada: "Noto Sans Kannada", sans-serif;
  --font-family-hindi: "Noto Sans Devanagari", sans-serif;
  --font-family-tamil: "Noto Sans Tamil", sans-serif;
  --font-family-telugu: "Noto Sans Telugu", sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    /* RGB versions for opacity control (Dark Mode) */
    --color-gray-400-rgb: 119, 124, 124;
    --color-teal-300-rgb: 50, 184, 198;
    --color-gray-300-rgb: 167, 169, 169;
    --color-gray-200-rgb: 245, 245, 245;

    /* Background color tokens (Dark Mode) */
    --color-bg-1: rgba(29, 78, 216, 0.15); /* Dark blue */
    --color-bg-2: rgba(180, 83, 9, 0.15); /* Dark yellow */
    --color-bg-3: rgba(21, 128, 61, 0.15); /* Dark green */
    --color-bg-4: rgba(185, 28, 28, 0.15); /* Dark red */
    --color-bg-5: rgba(107, 33, 168, 0.15); /* Dark purple */
    --color-bg-6: rgba(194, 65, 12, 0.15); /* Dark orange */
    --color-bg-7: rgba(190, 24, 93, 0.15); /* Dark pink */
    --color-bg-8: rgba(8, 145, 178, 0.15); /* Dark cyan */

    /* Semantic Color Tokens (Dark Mode) */
    --color-background: var(--color-charcoal-700);
    --color-surface: var(--color-charcoal-800);
    --color-text: var(--color-gray-200);
    --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
    --color-primary: var(--color-teal-300);
    --color-primary-hover: var(--color-teal-400);
    --color-primary-active: var(--color-teal-800);
    --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
    --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
    --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
    --color-border: rgba(var(--color-gray-400-rgb), 0.3);
    --color-error: var(--color-red-400);
    --color-success: var(--color-teal-300);
    --color-warning: var(--color-orange-400);
    --color-info: var(--color-gray-300);
    --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
    --color-btn-primary-text: var(--color-slate-900);
    --color-card-border: rgba(var(--color-gray-400-rgb), 0.2);
    --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --button-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

    /* Common style patterns - updated for dark mode */
    --focus-ring: 0 0 0 3px var(--color-focus-ring);
    --focus-outline: 2px solid var(--color-primary);
    --status-bg-opacity: 0.15;
    --status-border-opacity: 0.25;
    --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

    /* RGB versions for dark mode */
    --color-success-rgb: var(--color-teal-300-rgb);
    --color-error-rgb: var(--color-red-400-rgb);
    --color-warning-rgb: var(--color-orange-400-rgb);
    --color-info-rgb: var(--color-gray-300-rgb);
  }
}

/* Data attribute for manual theme switching */
[data-color-scheme="dark"] {
  /* RGB versions for opacity control (dark mode) */
  --color-gray-400-rgb: 119, 124, 124;
  --color-teal-300-rgb: 50, 184, 198;
  --color-gray-300-rgb: 167, 169, 169;
  --color-gray-200-rgb: 245, 245, 245;

  /* Colorful background palette - Dark Mode */
  --color-bg-1: rgba(29, 78, 216, 0.15); /* Dark blue */
  --color-bg-2: rgba(180, 83, 9, 0.15); /* Dark yellow */
  --color-bg-3: rgba(21, 128, 61, 0.15); /* Dark green */
  --color-bg-4: rgba(185, 28, 28, 0.15); /* Dark red */
  --color-bg-5: rgba(107, 33, 168, 0.15); /* Dark purple */
  --color-bg-6: rgba(194, 65, 12, 0.15); /* Dark orange */
  --color-bg-7: rgba(190, 24, 93, 0.15); /* Dark pink */
  --color-bg-8: rgba(8, 145, 178, 0.15); /* Dark cyan */

  /* Semantic Color Tokens (Dark Mode) */
  --color-background: var(--color-charcoal-700);
  --color-surface: var(--color-charcoal-800);
  --color-text: var(--color-gray-200);
  --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
  --color-primary: var(--color-teal-300);
  --color-primary-hover: var(--color-teal-400);
  --color-primary-active: var(--color-teal-800);
  --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
  --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
  --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
  --color-border: rgba(var(--color-gray-400-rgb), 0.3);
  --color-error: var(--color-red-400);
  --color-success: var(--color-teal-300);
  --color-warning: var(--color-orange-400);
  --color-info: var(--color-gray-300);
  --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
  --color-btn-primary-text: var(--color-slate-900);
  --color-card-border: rgba(var(--color-gray-400-rgb), 0.15);
  --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.15);
  --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
  --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

  /* Common style patterns - updated for dark mode */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for dark mode */
  --color-success-rgb: var(--color-teal-300-rgb);
  --color-error-rgb: var(--color-red-400-rgb);
  --color-warning-rgb: var(--color-orange-400-rgb);
  --color-info-rgb: var(--color-gray-300-rgb);
}

[data-color-scheme="light"] {
  /* RGB versions for opacity control (light mode) */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);

  /* RGB versions for light mode */
  --color-success-rgb: var(--color-teal-500-rgb);
  --color-error-rgb: var(--color-red-500-rgb);
  --color-warning-rgb: var(--color-orange-500-rgb);
  --color-info-rgb: var(--color-slate-500-rgb);
}

/* Base styles */
/* Base styles - Mobile First */
html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
  /* Mobile-first optimizations */
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  padding: 0;
  /* Mobile-first body optimizations */
  overscroll-behavior: none;
  -webkit-overflow-scrolling: touch;
  overflow-x: hidden;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-md);
}

p {
  margin: 0 0 var(--space-16) 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

a:hover {
  color: var(--color-primary-hover);
}

code,
pre {
  font-family: var(--font-family-mono);
  font-size: calc(var(--font-size-base) * 0.95);
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

code {
  padding: var(--space-1) var(--space-4);
}

pre {
  padding: var(--space-16);
  margin: var(--space-16) 0;
  overflow: auto;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--primary:active {
  background: var(--color-primary-active);
}

.btn--secondary {
  background: var(--color-secondary);
  color: var(--color-text);
}

.btn--secondary:hover {
  background: var(--color-secondary-hover);
}

.btn--secondary:active {
  background: var(--color-secondary-active);
}

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--outline:hover {
  background: var(--color-secondary);
}

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: var(--space-10) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn--full-width {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

textarea.form-control {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
}

select.form-control {
  padding: var(--space-8) var(--space-12);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: var(--select-caret-light);
  background-repeat: no-repeat;
  background-position: right var(--space-12) center;
  background-size: 16px;
  padding-right: var(--space-32);
}

/* Add a dark mode specific caret */
@media (prefers-color-scheme: dark) {
  select.form-control {
    background-image: var(--select-caret-dark);
  }
}

/* Also handle data-color-scheme */
[data-color-scheme="dark"] select.form-control {
  background-image: var(--select-caret-dark);
}

[data-color-scheme="light"] select.form-control {
  background-image: var(--select-caret-light);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: var(--focus-outline);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group {
  margin-bottom: var(--space-16);
}

/* Card component */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__body {
  padding: var(--space-16);
}

.card__header,
.card__footer {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-card-border-inner);
}

/* Status indicators - simplified with CSS variables */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(
    var(--color-success-rgb, 33, 128, 141),
    var(--status-bg-opacity)
  );
  color: var(--color-success);
  border: 1px solid
    rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(
    var(--color-error-rgb, 192, 21, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-error);
  border: 1px solid
    rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(
    var(--color-warning-rgb, 168, 75, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-warning);
  border: 1px solid
    rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}

.status--info {
  background-color: rgba(
    var(--color-info-rgb, 98, 108, 113),
    var(--status-bg-opacity)
  );
  color: var(--color-info);
  border: 1px solid
    rgba(var(--color-info-rgb, 98, 108, 113), var(--status-border-opacity));
}

/* Container layout */
.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: var(--space-16);
  padding-left: var(--space-16);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}
@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}
@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}
@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* Utility classes */
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.gap-4 {
  gap: var(--space-4);
}
.gap-8 {
  gap: var(--space-8);
}
.gap-16 {
  gap: var(--space-16);
}

.m-0 {
  margin: 0;
}
.mt-8 {
  margin-top: var(--space-8);
}
.mb-8 {
  margin-bottom: var(--space-8);
}
.mx-8 {
  margin-left: var(--space-8);
  margin-right: var(--space-8);
}
.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.p-0 {
  padding: 0;
}
.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}
.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}
.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}
.px-16 {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

.block {
  display: block;
}
.hidden {
  display: none;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Dark mode specifics */
[data-color-scheme="dark"] .btn--outline {
  border: 1px solid var(--color-border-secondary);
}

/* Script-specific font families */
.malayalam-text {
  font-family: var(--font-family-malayalam);
}

.kannada-text {
  font-family: var(--font-family-kannada);
}

.hindi-text {
  font-family: var(--font-family-hindi);
}

.tamil-text {
  font-family: var(--font-family-tamil);
}

.telugu-text {
  font-family: var(--font-family-telugu);
}

/* Character display with appropriate fonts */
.alphabet-character,
.comparison-character {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  line-height: 1.2;
  text-align: center;
  user-select: none;
}

.alphabet-character {
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1;
}

.comparison-character {
  font-size: clamp(36px, 6vw, 60px);
  margin: var(--space-12) 0;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Language-specific character styling */
.language-native {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-8);
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

/* Apply appropriate fonts to language natives */
.language-card[data-language="malayalam"] .language-native {
  font-family: var(--font-family-malayalam);
}

.language-card[data-language="kannada"] .language-native {
  font-family: var(--font-family-kannada);
}

.language-card[data-language="hindi"] .language-native {
  font-family: var(--font-family-hindi);
}

.language-card[data-language="tamil"] .language-native {
  font-family: var(--font-family-tamil);
}

.language-card[data-language="telugu"] .language-native {
  font-family: var(--font-family-telugu);
}

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2')
    format('woff2');
}

/* END PERPLEXITY DESIGN SYSTEM */
/* Screen Management - Immediate visibility */
.screen {
  min-height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
}

.screen.hidden {
  display: none;
}

/* Letter Screen - No scrolling, 100vh height */
.letter-screen {
  height: 100vh;
  overflow: hidden;
  position: relative;
}

/* Fixed back button - top-left corner */
.back-button {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 100;
  min-width: 80px;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
}

/* Navigation arrows - center left/right */
.nav-arrow-left {
  position: fixed;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  font-size: 24px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
}

.nav-arrow-right {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  font-size: 24px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
}

/* Hide navigation arrows when disabled */
.nav-arrow-left:disabled,
.nav-arrow-right:disabled {
  display: none;
}

/* Welcome/Selection Screen */
#language-selection-screen {
  background: var(--color-bg-1);
  padding: var(--space-24) var(--space-16);
  justify-content: flex-start;
  align-items: center;
  overflow-y: auto;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.selection-header {
  text-align: center;
  margin-bottom: var(--space-32);
}

.welcome-icon {
  font-size: 64px;
  margin-bottom: var(--space-16);
}

.selection-header h1 {
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.selection-header p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  max-width: 400px;
  margin: 0 auto;
}

.selection-section {
  margin-bottom: var(--space-32);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.selection-section h2 {
  text-align: center;
  margin-bottom: var(--space-8);
  color: var(--color-text);
  font-size: var(--font-size-2xl);
}

.selection-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--font-size-md);
  margin-bottom: var(--space-24);
}

/* Mother Tongue Selection */
.mother-tongue-selection {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-16);
  margin-bottom: var(--space-24);
}

.mother-tongue-card {
  border: 2px solid var(--color-card-border);
  background: var(--color-surface);
}

.mother-tongue-card.selected {
  border-color: var(--color-primary);
  background: var(--color-bg-1);
  box-shadow: var(--shadow-md);
}

/* Target Languages Grid */
.language-selection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-16);
  margin-bottom: var(--space-24);
}

.target-language-card.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--color-secondary);
}

.target-language-card.disabled:hover {
  border-color: var(--color-card-border);
  box-shadow: none;
  transform: none;
}

/* Learning Mode Selection */
.learning-mode-selection {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-20);
  margin-bottom: var(--space-32);
}

.mode-card {
  background: var(--color-surface);
  border: 2px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  position: relative;
  text-align: center;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.mode-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.mode-card.selected {
  border-color: var(--color-primary);
  background: var(--color-bg-1);
  box-shadow: var(--shadow-sm);
}

.mode-icon {
  font-size: 48px;
  margin-bottom: var(--space-12);
}

.mode-card h3 {
  margin-bottom: var(--space-8);
  color: var(--color-text);
  font-size: var(--font-size-xl);
}

.mode-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  margin-bottom: var(--space-16);
  max-width: 250px;
}

/* Radio button styling */
.radio-container {
  position: absolute;
  top: var(--space-12);
  right: var(--space-12);
}

.radio-container input[type="radio"] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.radio-label {
  display: block;
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  background: var(--color-surface);
  transition: all var(--duration-fast) var(--ease-standard);
}

.radio-container input[type="radio"]:checked + .radio-label {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.radio-container input[type="radio"]:checked + .radio-label::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-btn-primary-text);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.language-card {
  background: var(--color-surface);
  border: 2px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  position: relative;
  min-height: 120px;
  display: flex;
  align-items: center;
}

.language-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.language-card.selected {
  border-color: var(--color-primary);
  background: var(--color-bg-1);
  box-shadow: var(--shadow-sm);
}

.language-card-content {
  width: 100%;
  text-align: center;
}

.language-native {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-8);
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

.language-english {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.checkbox-container {
  position: absolute;
  top: var(--space-12);
  right: var(--space-12);
}

.checkbox-container input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.checkbox-label {
  display: block;
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: var(--color-surface);
  transition: all var(--duration-fast) var(--ease-standard);
}

.checkbox-container input[type="checkbox"]:checked + .checkbox-label {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-container input[type="checkbox"]:checked + .checkbox-label::after {
  content: '✓';
  position: absolute;
  color: var(--color-btn-primary-text);
  font-size: 16px;
  font-weight: bold;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Fixed selection actions positioning */
.selection-actions {
  text-align: center;
  margin-top: var(--space-32);
  margin-bottom: var(--space-24);
  padding: var(--space-16);
  width: 100%;
}

/* Ensure Start Learning button is visible and prominent */
#start-learning-btn {
  min-width: 200px;
  font-size: var(--font-size-lg);
  padding: var(--space-16) var(--space-32);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--duration-fast) var(--ease-standard);
}

#start-learning-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

#start-learning-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-sm);
}

/* Main App Screen */
#main-screen {
  background: var(--color-background);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-16);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-card-border);
}

.app-header h1 {
  font-size: var(--font-size-2xl);
  color: var(--color-text);
  margin: 0;
}

.header-actions {
  display: flex;
  gap: var(--space-8);
}

/* Language Tabs */
.tabs-container {
  padding: var(--space-16);
  background: var(--color-background);
  border-bottom: 1px solid var(--color-card-border);
}

.tabs {
  display: flex;
  gap: var(--space-8);
  overflow-x: auto;
}

.tab {
  flex-shrink: 0;
  padding: var(--space-12) var(--space-20);
  border: none;
  border-radius: var(--radius-full);
  background: var(--color-secondary);
  color: var(--color-text);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  min-width: 100px;
  text-align: center;
}

.tab:hover {
  background: var(--color-secondary-hover);
}

.tab.active {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
}

/* Category Section */
.category-section {
  padding: var(--space-16);
  background: var(--color-background);
}

.category-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  max-width: 500px;
  margin: 0 auto;
}

.category-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-16);
  min-height: 50px;
}

.category-btn.active {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
}

.category-count {
  background: rgba(255, 255, 255, 0.2);
  padding: var(--space-2) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  min-width: 20px;
  text-align: center;
}

/* Alphabet Grid */
.alphabet-container {
  padding: var(--space-16);
  flex: 1;
  padding-bottom: 80px; /* Space for bottom navigation */
}

.alphabet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: var(--space-12);
  max-width: 1000px;
  margin: 0 auto;
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-card-border);
  display: flex;
  justify-content: space-around;
  padding: var(--space-8) var(--space-4);
  z-index: 100;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-8) var(--space-12);
  border: none;
  background: transparent;
  border-radius: var(--radius-base);
  transition: all var(--duration-fast) var(--ease-standard);
  cursor: pointer;
  min-width: 60px;
  flex: 1;
  max-width: 100px;
}

.nav-item:hover {
  background: var(--color-secondary);
}

.nav-item.active {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
}

.nav-icon {
  font-size: 20px;
  line-height: 1;
}

.nav-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1;
}

.nav-item.active .nav-label {
  color: var(--color-btn-primary-text);
}

/* Service Worker Update Banner */
.sw-update-banner {
  position: fixed;
  bottom: 90px; /* above bottom nav */
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  display: flex;
  gap: var(--space-12);
  align-items: center;
  z-index: 1500;
  font-size: var(--font-size-sm);
  animation: toast-in 0.3s ease-out;
}
.sw-update-banner button {
  font-size: var(--font-size-sm);
  padding: var(--space-4) var(--space-12);
}
.sw-update-banner .dismiss-btn {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
}
@media (max-width: 600px) {
  .sw-update-banner { bottom: 120px; flex-direction: column; border-radius: var(--radius-lg); }
  .sw-update-banner button { width: 100%; }
}

/* Practice Screen */
.practice-screen {
  background: var(--color-background);
  height: 100vh;
  overflow: hidden;
}

.practice-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-12) var(--space-20);
  border-bottom: 1px solid var(--color-card-border);
  background: var(--color-surface);
  min-height: 60px;
  margin-top: 50px;
}

.practice-header h2 {
  margin: 0;
  font-size: var(--font-size-3xl);
  color: var(--color-text);
}

.practice-mode-toggle {
  display: flex;
  gap: var(--space-8);
}

.practice-content {
  padding: var(--space-12);
  flex: 1;
  overflow: hidden;
  height: calc(100vh - 110px);
  display: flex;
  flex-direction: column;
}

.practice-area {
  max-width: 1000px;
  margin: 0 auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-16);
  flex: 1;
  border: 1px solid var(--color-card-border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Progress Screen */
.progress-screen {
  background: var(--color-background);
}

.progress-header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-20);
  border-bottom: 1px solid var(--color-card-border);
  background: var(--color-surface);
  min-height: 70px;
  margin-top: 60px;
}

.progress-header h2 {
  margin: 0;
  font-size: var(--font-size-3xl);
  color: var(--color-text);
}

.progress-content {
  padding: var(--space-16);
  flex: 1;
  overflow-y: auto;
  height: calc(100vh - 130px);
  padding-bottom: 80px;
}

.progress-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-16);
  margin-bottom: var(--space-32);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-8);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.progress-export {
  max-width: 600px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.progress-export h3 {
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.export-actions {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.export-actions .btn {
  flex: 1;
  min-width: 140px;
}

/* Practice Screen Components */
.practice-visual h3,
.practice-tracing h3 {
  margin-bottom: var(--space-12);
  color: var(--color-text);
  text-align: center;
}

.practice-visual p,
.practice-tracing p {
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-24);
}
character-info-row
.practice-comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-16);
  margin-top: var(--space-16);
}

.tracing-canvas-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-16);
}

#tracing-canvas {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-base);
  background: var(--color-background);
  cursor: crosshair;
}

#reset-tracing {
  margin-top: var(--space-12);
}

/* Mobile Practice Tracing Styles - Force Override */
.practice-area .mobile-practice-tracing {
  padding: var(--space-8);
  max-width: 100%;
  margin: 0 auto;
  display: flex !important;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

/* Practice Controls */
.practice-controls {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-12);
  margin-bottom: var(--space-12);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  flex-shrink: 0;
}

.language-selector,
.category-selector {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.language-selector label,
.category-selector label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.language-select,
.category-select {
  padding: var(--space-8) var(--space-12);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  background: white;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  cursor: pointer;
}

.language-select:focus,
.category-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(33, 128, 141, 0.1);
}

.mobile-practice-tracing .character-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-12);
  padding: 0 var(--space-8);
  flex-shrink: 0;
}

.mobile-practice-tracing .nav-btn {
  background: var(--color-primary);
  color: white;
  border: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: var(--font-size-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.mobile-practice-tracing .nav-btn:active {
  transform: scale(0.95);
  background: var(--color-primary-hover);
}

.mobile-practice-tracing .character-counter {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  background: var(--color-surface);
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* Hide old complex tracing interface */
.practice-tracing,
.tracing-header,
.tracing-controls,
.character-selector,
.tracing-modes,
.guided-mode,
.memory-mode {
  display: none !important;
}

/* Mobile Tracing Area */
/* Simplified Tracing Layout */
.character-info-row {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100vh;
  min-height: 100vh;
}

.character-display {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-12);
  text-align: center;
  min-width: 120px;
}

.tracing-instruction-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

.tracing-instruction {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.pronounce-btn {
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pronounce-btn:hover {
  background: var(--color-primary-dark);
  transform: scale(1.05);
}

.pronounce-btn:active {
  transform: scale(0.95);
}

.mother-tongue-display {
  background: var(--color-bg-3);
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-12);
  text-align: center;
  min-width: 120px;
}

.mother-tongue-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
}

.mother-tongue-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-4);
}

.mother-tongue-character {
  font-size: 48px;
  font-weight: bold;
  color: var(--color-primary);
  line-height: 1;
  text-align: center;
}

.mother-tongue-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

.mother-tongue-language {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.character-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-12);
}

.current-character {
  font-size: 60px;
  font-weight: bold;
  color: var(--color-text);
  line-height: 1;
  text-align: center;
}

.character-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  align-items: center;
}

.character-english {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  background: rgba(var(--color-teal-500-rgb), 0.1);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-base);
  font-family: monospace;
}

.character-ipa {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  font-family: monospace;
  background: var(--color-gray-200);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-sm);
}

.tracing-area {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-16);
  width: 100%;
  max-width: 100%;
  padding: 0 var(--space-12);
  /* Take full available height */
  height: 100vh;
  min-height: 100vh;
}

.tracing-instruction {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  flex-shrink: 0;
}

.canvas-container {
  position: relative;
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  flex-shrink: 0;
  width: 100%;
  /* Ensure container adapts to dynamic canvas size */
  align-items: center;
}

.practice-canvas {
  background: white;
  border: 2px solid var(--color-border);
  cursor: crosshair;
  touch-action: none;
  display: block;
  width: 100%;
  height: 100%;
  /* Take all available space in container */
  min-height: 300px;
  border-radius: var(--radius-lg);
  /* CSS custom property for canvas size */
  --canvas-size: 100%;
}

.canvas-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.tracing-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
  flex-shrink: 0;
}

.control-btn {
  padding: var(--space-10) var(--space-16);
  border: 1px solid var(--color-border);
  background: white;
  color: var(--color-text);
  border-radius: var(--radius-base);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 70px;
}

.control-btn:active {
  transform: scale(0.98);
}

.control-btn.primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.control-btn[data-active="true"] {
  background: var(--color-success);
  color: white;
  border-color: var(--color-success);
}

.control-btn[data-active="false"] {
  background: var(--color-secondary);
  color: var(--color-text);
}

/* Practice Feedback */
.practice-feedback {
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feedback {
  padding: var(--space-16);
  border-radius: var(--radius-lg);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  max-width: 280px;
  margin: 0 auto;
}

.feedback.good {
  background: linear-gradient(135deg, #d4edda, #c3e6cb);
  border: 1px solid var(--color-success);
  color: #155724;
}

.feedback.okay {
  background: linear-gradient(135deg, #fff3cd, #ffeaa7);
  border: 1px solid var(--color-warning);
  color: #856404;
}

.feedback-icon {
  font-size: var(--font-size-2xl);
}

.feedback-text {
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-md);
}

.feedback-score {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* Remove old complex styles */

/* Animation for successful completion */
.character-complete {
  animation: characterSuccess 0.6s ease-out;
}

@keyframes characterSuccess {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); background-color: #d4edda; }
  100% { transform: scale(1); }
}

/* Toast notifications */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: var(--primary-color);
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  z-index: 10000;
  font-weight: 500;
  opacity: 0;
  transition: all 0.3s ease;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.alphabet-card {
  aspect-ratio: 1;
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  min-height: 70px;
}

.alphabet-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

/* Comparison Screen - Fixed layout with no scrolling */
#comparison-screen {
  background: var(--color-background);
}

.comparison-header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-20);
  border-bottom: 1px solid var(--color-card-border);
  background: var(--color-surface);
  min-height: 70px;
  margin-top: 60px; /* Space for fixed back button */
}

.comparison-header h2 {
  margin: 0;
  font-size: var(--font-size-3xl);
  color: var(--color-text);
  text-align: center;
}

.comparison-content {
  padding: var(--space-16);
  flex: 1;
  overflow: hidden; /* Remove scroll */
  height: calc(100vh - 130px); /* Subtract header height and margins */
  display: flex;
  flex-direction: column;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr; /* Fixed two columns */
  gap: var(--space-16);
  max-width: 1000px;
  margin: 0 auto;
  flex: 1;
  align-content: start;
}

/* Common information section */
.common-info {
  background: var(--color-bg-2);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-12);
  margin-bottom: var(--space-16);
  text-align: center;
  grid-column: 1 / -1; /* Span both columns */
}

.common-info-content {
  display: flex;
  justify-content: center;
  gap: var(--space-20);
  flex-wrap: wrap;
}

.common-item {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.common-item .label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.common-item span:not(.label) {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.comparison-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-16);
  text-align: center;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.comparison-card.no-equivalent {
  background: var(--color-bg-4);
  border-style: dashed;
  opacity: 0.7;
}

.comparison-language {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-12);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.comparison-details {
  flex-grow: 1;
  margin: var(--space-8) 0;
}

.comparison-details .label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.comparison-transliteration,
.comparison-ipa,
.regional-hint {
  margin-bottom: var(--space-6);
  text-align: left;
}

.regional-hint {
  background: var(--color-bg-2);
  padding: var(--space-6);
  border-radius: var(--radius-sm);
  font-style: italic;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
}

.comparison-transliteration span:not(.label) {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  font-style: italic;
}

.comparison-ipa span:not(.label) {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  font-family: 'Courier New', monospace;
}

.audio-btn {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
  border: none;
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  margin: 0 auto;
  font-size: 18px;
}

.audio-btn:hover {
  background: var(--color-primary-hover);
  transform: scale(1.05);
}

.audio-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.no-equivalent-text {
  color: var(--color-text-secondary);
  font-style: italic;
  font-size: var(--font-size-lg);
  margin: auto 0;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: var(--space-24);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  max-width: 350px;
  width: 100%;
  padding: 0 var(--space-16);
}

.toast {
  background: var(--color-surface);
  color: var(--color-text);
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--space-8);
  font-size: var(--font-size-sm);
  text-align: center;
  animation: toast-in 0.3s ease-out;
}

.toast.toast-out {
  animation: toast-out 0.3s ease-in;
}

@keyframes toast-in {
  from {
    transform: translateY(100px);
    opacity: 0;
  }
  to {
    transform: translateY(0);  
    opacity: 1;
  }
}

@keyframes toast-out {
  from {
    transform: translateY(0);
    opacity: 1;
  }
  to {
    transform: translateY(100px);
    opacity: 0;
  }
}

/* PWA Install Prompt */
.install-prompt {
  position: fixed;
  top: var(--space-16);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1001;
  max-width: 400px;
  width: calc(100% - var(--space-32));
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: toast-in 0.3s ease-out;
}

.install-content {
  padding: var(--space-16);
  display: flex;
  align-items: center;
  gap: var(--space-12);
  font-size: var(--font-size-sm);
}

.install-content span {
  flex: 1;
  color: var(--color-text);
}

  .install-content .btn {
    flex-shrink: 0;
  }
  
  .bottom-nav {
    padding: var(--space-6) var(--space-2);
  }
  
  .nav-item {
    padding: var(--space-6) var(--space-8);
    min-width: 50px;
  }
  
  .nav-icon {
    font-size: 18px;
  }
  
  .nav-label {
    font-size: 10px;
  }
  
  .practice-content,
  .progress-content {
    padding: var(--space-12);
  }
  
  .progress-stats {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .export-actions {
    flex-direction: column;
  }
  
  .export-actions .btn {
    min-width: auto;
  }
  
  #tracing-canvas {
    width: 100%;
    max-width: 350px;
    height: 350px;
  }/* Responsive Design */
@media (max-width: 768px) {
  .mother-tongue-selection {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .language-selection-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .learning-mode-selection {
    grid-template-columns: 1fr;
    gap: var(--space-16);
  }
  
  .common-info-content {
    flex-direction: column;
    gap: var(--space-12);
  }
  
  .common-item {
    justify-content: center;
  }
  
  .mode-card {
    min-height: 140px;
    padding: var(--space-16);
  }
  
  .comparison-grid {
    grid-template-columns: 1fr 1fr; /* Keep two columns even on mobile */
    gap: var(--space-12);
  }
  
  .comparison-card {
    min-height: 120px;
    padding: var(--space-12);
  }
  
  .comparison-details {
    margin: var(--space-6) 0;
  }
  
  .common-info {
    padding: var(--space-8);
    margin-bottom: var(--space-12);
  }
  
  .common-info-content {
    gap: var(--space-8);
  }
  
  .alphabet-grid {
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: var(--space-8);
  }
  
  .alphabet-card {
    min-height: 60px;
  }
  
  #start-learning-btn {
    min-width: 180px;
    font-size: var(--font-size-md);
  }

  /* Mobile navigation arrows */
  .nav-arrow-left,
  .nav-arrow-right {
    width: 44px;
    height: 44px;
    font-size: 20px;
  }

  .nav-arrow-left {
    left: 12px;
  }

  .nav-arrow-right {
    right: 12px;
  }

  .back-button {
    top: 12px;
    left: 12px;
    font-size: var(--font-size-sm);
  }

  .comparison-header {
    margin-top: 50px;
    padding: var(--space-12);
  }

  .comparison-header h2 {
    font-size: var(--font-size-2xl);
  }
  
  .selection-section h2 {
    font-size: var(--font-size-xl);
  }
  
  .selection-subtitle {
    font-size: var(--font-size-sm);
  }
}

@media (max-width: 480px) {
  .language-native {
    font-size: var(--font-size-2xl);
  }
  
  .welcome-icon {
    font-size: 48px;
  }
  
  .category-buttons {
    gap: var(--space-8);
  }
  
  .selection-actions {
    padding: var(--space-12);
  }

  .comparison-content {
    padding: var(--space-12);
    height: calc(100vh - 110px);
  }
  
  .mode-icon {
    font-size: 36px;
  }
  
  .mode-card h3 {
    font-size: var(--font-size-lg);
  }
  
  .mode-card p {
    font-size: var(--font-size-xs);
  }
  
  .selection-header h1 {
    font-size: var(--font-size-3xl);
  }
  
  /* Mobile adjustments for simplified layout */
  .character-info-row {
    padding: var(--space-8);
    height: 100vh;
    min-height: 100vh;
  }
  
  .tracing-area {
    max-width: 100%;
    height: 100vh;
    min-height: 100vh;
  }
  
  .current-character,
  .mother-tongue-character {
    font-size: 40px;
  }
  
  .character-english {
    font-size: var(--font-size-sm);
    padding: var(--space-2) var(--space-6);
  }
  
  .character-ipa {
    font-size: var(--font-size-sm);
  }
  
  .tracing-area {
    order: 1;
  }
  
  /* Mobile Practice Tracing */
  .mobile-practice-tracing {
    padding: var(--space-12);
  }
  
  .character-navigation {
    margin-bottom: var(--space-16);
  }
  
  .nav-btn {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-lg);
  }
  
  .character-counter {
    font-size: var(--font-size-md);
    padding: var(--space-6) var(--space-12);
  }
  
  .tracing-controls {
  .tracing-controls {
    flex-wrap: wrap;
    gap: var(--space-8);
  }
  
  .control-btn {
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-xs);
    min-width: 60px;
  }
  
  /* Canvas takes full available space on mobile too */
  .practice-canvas {
    width: 100% !important;
    height: 100% !important;
    min-height: 250px !important;
    --canvas-size: 100%;
  }
  
  .pronounce-btn {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }
  
  .tracing-instruction {
    font-size: var(--font-size-xs);
  }
  
  .feedback {
    padding: var(--space-12);
    max-width: 250px;
  }
  
  .feedback-text {
    font-size: var(--font-size-sm);
  }
}
}