: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-size-xs: 28px;
  --font-size-sm: 28px;
  --font-size-base: 28px;
  --font-size-md: 28px;
  --font-size-lg: 30px;
  --font-size-xl: 32px;
  --font-size-2xl: 34px;
  --font-size-3xl: 36px;
  --font-size-4xl: 40px;
  --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 */
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;
}

body {
  margin: 0;
  padding: 0;
}

*,
*::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);
}

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

/* END PERPLEXITY DESIGN SYSTEM */
/* Combinatorial Analysis Presentation - 20 Slides with 28px+ fonts */

.presentation-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-background);
  position: relative;
  overflow: hidden;
}

/* Fullscreen styles */
.presentation-container.fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
}

/* Auto-hide navigation in fullscreen */
.presentation-container.fullscreen .nav-controls {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
  pointer-events: none;
}

.presentation-container.fullscreen .timer-display {
  top: var(--space-12);
  right: 120px;
}

.presentation-container.fullscreen .timer-display.active {
  opacity: 1 !important;
}

.presentation-container.fullscreen .slide-dots {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

.presentation-container.fullscreen .fullscreen-btn {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

/* Fullscreen button */
.fullscreen-btn {
  position: fixed;
  top: var(--space-20);
  right: 80px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  padding: var(--space-12);
  font-size: 28px;
  cursor: pointer;
  z-index: 1001;
  transition: all 0.3s ease;
}

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

/* Navigation Controls */
.nav-controls {
  position: fixed;
  top: var(--space-20);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: var(--space-20);
  z-index: 1000;
  background: var(--color-surface);
  padding: var(--space-12) var(--space-20);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.nav-btn {
  padding: var(--space-12) var(--space-20);
  font-size: 28px;
  min-height: 44px;
  min-width: 120px;
}

.slide-counter {
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  font-size: 28px;
}

/* Timer Display */
.timer-display {
  position: fixed;
  top: var(--space-20);
  right: 140px;
  background: var(--color-bg-3);
  padding: var(--space-12) var(--space-20);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-border);
  z-index: 1000;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-standard);
}

.timer-display.active {
  opacity: 1 !important;
}

.timer-content {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  font-size: 36px;
}

/* Slide Styles */
.slide {
  flex: 1;
  display: none;
  padding: 2vh 2vw;
  align-items: center;
  justify-content: center;
  height: 100vh;
  box-sizing: border-box;
  overflow-y: auto;
}

.slide.active {
  display: flex;
}

.slide-content {
  max-width: min(90vw, 1100px);
  width: 100%;
  margin: 0 auto;
  max-height: 88vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: var(--space-8);
}

/* Typography - All 28px+ as required */
.slide-content h2 {
  font-size: clamp(36px, 4.5vw, 48px);
  margin-bottom: var(--space-0);
  text-align: center;
  color: var(--color-primary);
}

.slide-content h3 {
  font-size: clamp(28px, 3.5vw, 32px);
  margin-bottom: var(--space-12);
  color: var(--color-primary);
}

.slide-content h4 {
  font-size: clamp(28px, 3.2vw, 32px);
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.slide-content p, 
.slide-content li, 
.slide-content label,
.slide-content span {
  font-size: clamp(28px, 2.8vw, 32px);
  line-height: 1.4;
  margin-bottom: var(--space-12);
}

/* Title Slide */
.title-slide {
  text-align: center;
}

.main-title {
  font-size: clamp(54px, 7vw, 72px);
  margin-bottom: var(--space-24);
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.subtitle {
  font-size: clamp(42px, 5vw, 48px);
  margin-bottom: var(--space-32);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-normal);
}

.presenter-info p {
  font-size: 32px;
  margin: var(--space-8) 0;
  color: var(--color-text-secondary);
}

.presenter {
  font-weight: var(--font-weight-medium);
}

/* Learning Objectives */
.objectives-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-32);
  margin-top: var(--space-32);
}

.objective-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-32);
  text-align: center;
  transition: transform var(--duration-normal) var(--ease-standard);
}

.objective-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.objective-icon {
  font-size: 60px;
  margin-bottom: var(--space-20);
}

.objective-card h3 {
  margin-bottom: var(--space-16);
  color: var(--color-primary);
  font-size: 32px;
}

.objective-card p {
  font-size: 28px;
}

/* Theory Content */
.theory-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.principle-box,
.definition-box,
.theorem-box,
.method-box {
  background: var(--color-surface);
  padding: var(--space-12);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  border-left: 4px solid var(--color-primary);
  margin-bottom: var(--space-12);
}

.difference-box {
  background: var(--color-surface);
  padding: var(--space-12);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  border-left: 4px solid var(--color-warning);
}

/* Formula Displays */
.formula-display {
  background: var(--color-bg-4);
  padding: var(--space-8);
  border-radius: var(--radius-base);
  margin: var(--space-8) 0;
  text-align: center;
  border-left: 4px solid var(--color-warning);
  font-size: clamp(28px, 3vw, 32px);
}

/* Examples and Practice */
.examples-content,
.practice-content,
.application-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.example-box,
.pepper-example,
.committee-example,
.tournament-example,
.investment-example {
  background: var(--color-surface);
  padding: var(--space-32);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
}

/* Calculators */
.basic-calculator,
.permutation-calculator,
.combination-calculator,
.multinomial-calculator,
.investment-calculator {
  background: var(--color-surface);
  padding: var(--space-10);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
}

.calc-inputs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-20);
  margin-bottom: var(--space-16);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.input-group label {
  font-weight: var(--font-weight-medium);
  font-size: 28px;
}

.form-control {
  font-size: 28px;
  padding: var(--space-12) var(--space-16);
  min-height: 44px;
}

.calc-btn,
.activity-btn {
  padding: var(--space-16) var(--space-24);
  font-size: 28px;
  min-height: 44px;
  min-width: 200px;
}

.calculator-result {
  background: var(--color-bg-1);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  text-align: center;
  font-size: 32px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-top: var(--space-12);
}

/* Student Activities */
.student-activity {
  background: var(--color-bg-5);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  margin: var(--space-8) 0;
  border-left: 4px solid var(--color-success);
}

.student-activity h4 {
  margin-bottom: var(--space-12);
  color: var(--color-success);
  font-size: 32px;
}

.student-activity p {
  font-size: 28px;
  margin-bottom: var(--space-16);
}

.reveal-btn {
  margin-left: var(--space-12);
  padding: var(--space-12) var(--space-20);
  font-size: 28px;
  min-height: 44px;
}

.answer.hidden {
  display: none;
}

.answer {
  margin-top: var(--space-20);
  padding: var(--space-20);
  background: var(--color-surface);
  border-radius: var(--radius-base);
  border-left: 3px solid var(--color-primary);
}

.answer p {
  font-size: 28px;
  font-weight: var(--font-weight-bold);
}

/* Visual Demonstrations */
.visual-demo {
  background: var(--color-bg-2);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  margin: var(--space-12) 0;
}

.demo-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-20);
  flex-wrap: wrap;
}

.demo-step,
.demo-result {
  background: var(--color-surface);
  padding: var(--space-16) var(--space-20);
  border-radius: var(--radius-base);
  font-size: 28px;
  font-weight: var(--font-weight-medium);
}

.multiply,
.equals {
  font-size: 36px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

/* Interactive Proof Content */
.proof-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-20);
}

.combinatorial-proof,
.factor-demo,
.term-builder,
.pascal-generator,
.multi-factor-constructor,
.coefficient-calculator {
  background: var(--color-surface);
  padding: var(--space-24);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
}

.factor-boxes {
  display: flex;
  gap: var(--space-16);
  justify-content: center;
  margin: var(--space-20) 0;
}

.factor-box {
  background: var(--color-bg-1);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-base);
  padding: var(--space-16) var(--space-20);
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.build-btn,
.reset-btn {
  padding: var(--space-16) var(--space-24);
  font-size: 28px;
  min-height: 44px;
  margin-right: var(--space-12);
}

.terms-display,
.pascal-triangle,
.all-terms {
  background: var(--color-bg-3);
  padding: var(--space-20);
  border-radius: var(--radius-base);
  margin-top: var(--space-16);
  font-size: 28px;
}

/* Interactive Elements for Slide 15 */
.constructor-demo {
  background: var(--color-bg-6);
  padding: var(--space-20);
  border-radius: var(--radius-base);
}

.factor-selection {
  margin-bottom: var(--space-20);
}

.choice-set {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.choice-set span {
  font-size: 28px;
  font-weight: var(--font-weight-medium);
  min-width: 120px;
}

.choice-btn {
  padding: var(--space-12) var(--space-16);
  font-size: 28px;
  min-height: 44px;
  min-width: 60px;
  background: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
}

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

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

.current-term {
  padding: var(--space-16);
  background: var(--color-surface);
  border-radius: var(--radius-base);
  text-align: center;
}

#termDisplay {
  font-size: 32px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

/* Stars and Bars Visual */
.visual-representation {
  background: var(--color-bg-8);
  padding: var(--space-12);
  border-radius: var(--radius-base);
  margin: var(--space-8) 0;
  text-align: center;
}

.visual-representation p {
  font-size: clamp(28px, 2.8vw, 32px);
  margin-bottom: var(--space-8);
}

/* Quiz Styles */
.quiz-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-20);
}

.quiz-question {
  background: var(--color-surface);
  padding: var(--space-20);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
}

.quiz-question h3 {
  font-size: clamp(28px, 3.5vw, 32px);
  margin-bottom: var(--space-12);
  color: var(--color-primary);
}

.quiz-question p {
  font-size: clamp(28px, 2.8vw, 32px);
  margin-bottom: var(--space-16);
}

.quiz-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.quiz-option {
  padding: var(--space-12) var(--space-16);
  font-size: clamp(28px, 2.6vw, 30px);
  min-height: 44px;
  background: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  text-align: left;
}

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

.quiz-option.correct {
  background: var(--color-success);
  color: var(--color-btn-primary-text);
}

.quiz-option.incorrect {
  background: var(--color-error);
  color: var(--color-btn-primary-text);
}

.quiz-feedback {
  background: var(--color-bg-3);
  padding: var(--space-12);
  border-radius: var(--radius-base);
  margin-top: var(--space-12);
  font-size: 28px;
  display: none;
}

.quiz-feedback.show {
  display: block;
}

.quiz-timer {
  text-align: center;
}

/* Summary Slide */
.summary-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-32);
}

.formula-reference {
  text-align: center;
}

.formula-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-16);
  margin-top: var(--space-20);
}

.formula-card {
  background: var(--color-surface);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-card-border);
  text-align: center;
}

.formula-card h4 {
  color: var(--color-primary);
  margin-bottom: var(--space-8);
  font-size: clamp(28px, 3vw, 30px);
}

.formula-card p {
  font-size: clamp(28px, 2.8vw, 32px);
  margin-bottom: 0;
}

.key-concepts,
.next-steps {
  background: var(--color-surface);
  padding: var(--space-20);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  margin: var(--space-16) 0;
}

.decision-tree p {
  font-size: clamp(28px, 2.8vw, 32px);
  margin-bottom: var(--space-8);
  padding: var(--space-8) var(--space-12);
  background: var(--color-bg-2);
  border-radius: var(--radius-sm);
}

.next-steps ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.next-steps li {
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: clamp(28px, 2.8vw, 32px);
}

.next-steps li:last-child {
  border-bottom: none;
}

.conclusion {
  text-align: center;
  padding: var(--space-24);
  background: var(--color-bg-3);
  border-radius: var(--radius-lg);
}

.conclusion h2 {
  color: var(--color-primary);
  margin-bottom: var(--space-20);
  font-size: clamp(42px, 5vw, 48px);
}

.conclusion p {
  font-size: clamp(28px, 3vw, 32px);
  margin-bottom: var(--space-16);
}

.contact-info p {
  font-size: clamp(28px, 2.8vw, 32px);
  margin: var(--space-8) 0;
  color: var(--color-text-secondary);
}

.summary-stats {
  background: var(--color-surface);
  padding: var(--space-20);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  margin-top: var(--space-20);
}

.summary-stats h3 {
  margin-bottom: var(--space-16);
  font-size: clamp(32px, 3.5vw, 36px);
}

.summary-stats ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.summary-stats li {
  padding: var(--space-8) 0;
  font-size: clamp(28px, 2.8vw, 32px);
  border-bottom: 1px solid var(--color-border);
}

.summary-stats li:last-child {
  border-bottom: none;
}

/* Slide Dots Navigation */
.slide-dots {
  position: fixed;
  bottom: var(--space-32);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-8);
  z-index: 1000;
}

.dot {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  background: rgba(var(--color-text-secondary), 0.3);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
}

.dot.active {
  background: var(--color-primary);
  transform: scale(1.3);
}

.dot:hover {
  background: rgba(var(--color-primary-rgb), 0.6);
}

/* Responsive Design */
@media (max-width: 1200px) {
  .slide {
    padding: 3vh 3vw;
  }

  .slide-content {
    max-width: 95vw;
  }

  .main-title {
    font-size: clamp(40px, 6vw, 60px);
  }

  .subtitle {
    font-size: clamp(32px, 4.5vw, 40px);
  }

  .slide-content h2 {
    font-size: clamp(32px, 4vw, 40px);
  }
}

@media (max-width: 768px) {
  .slide {
    padding: 2vh 3vw;
  }

  .slide-content {
    max-width: 95vw;
    max-height: 95vh;
  }

  .nav-controls {
    top: var(--space-12);
    gap: var(--space-12);
    padding: var(--space-8) var(--space-12);
  }

  .nav-btn {
    padding: var(--space-8) var(--space-12);
    font-size: 28px;
    min-width: 80px;
  }

  .slide-counter {
    font-size: 28px;
  }

  .timer-display {
    top: var(--space-12);
    right: var(--space-12);
  }

  .timer-content {
    font-size: 28px;
  }

  .fullscreen-btn {
    top: var(--space-12);
    right: var(--space-12);
    font-size: 18px;
    padding: var(--space-8);
  }

  .objectives-grid,
  .formula-grid {
    grid-template-columns: 1fr;
  }

  .calc-inputs {
    grid-template-columns: 1fr;
  }

  .demo-grid {
    flex-direction: column;
  }

  .quiz-options {
    grid-template-columns: 1fr;
  }

  .main-title {
    font-size: clamp(36px, 8vw, 48px);
  }

  .subtitle {
    font-size: clamp(28px, 6vw, 36px);
  }

  .slide-content h2 {
    font-size: clamp(28px, 5vw, 36px);
  }

  .slide-content p, 
  .slide-content li, 
  .slide-content label,
  .slide-content span {
    font-size: clamp(28px, 4vw, 32px);
  }
}

@media (max-height: 600px) {
  .slide {
    padding: 1vh 2vw;
  }
  
  .slide-content {
    max-height: 96vh;
  }
  
  .main-title {
    font-size: clamp(42px, 5vh, 54px);
  }
  
  .subtitle {
    font-size: clamp(36px, 4vh, 42px);
  }
  
  .slide-content h2 {
    font-size: clamp(32px, 4vh, 36px);
  }
  
  .formula-grid {
    gap: var(--space-12);
  }
  
  .formula-card {
    padding: var(--space-12);
  }
  
  .key-concepts,
  .next-steps {
    padding: var(--space-16);
    margin: var(--space-12) 0;
  }
}

/* Responsive adjustments for smaller screen heights */
@media (max-height: 800px) {
  .visual-demo {
    padding: var(--space-8);
    margin: var(--space-8) 0;
  }
  
  .visual-representation {
    padding: var(--space-8);
    margin: var(--space-4) 0;
  }
  
  .visual-representation p {
    font-size: clamp(28px, 3vw, 32px);
    margin-bottom: var(--space-6);
  }
  
  .method-box {
    padding: var(--space-8);
  }
  
  .slide-content {
    max-height: 85vh;
  }
}

/* Compact slide variant for content-heavy slides */
.slide.compact .visual-demo {
  padding: var(--space-8);
  margin: var(--space-8) 0;
}

.slide.compact .visual-representation {
  padding: var(--space-8);
  margin: var(--space-6) 0;
}

.slide.compact .visual-representation p {
  font-size: clamp(28px, 3vw, 32px);
  margin-bottom: var(--space-6);
}

.slide.compact .method-box {
  padding: var(--space-8);
  margin-bottom: var(--space-8);
}

/* Add compact spacing for stars-bars-visual */
.stars-bars-visual {
  margin: var(--space-12) 0;
}

/* Accessibility */
.keyboard-nav {
  position: fixed;
  bottom: var(--space-12);
  right: var(--space-16);
  font-size: 28px;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  padding: var(--space-8) var(--space-12);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

/* Focus styles */
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .nav-controls,
  .timer-display,
  .slide-dots,
  .keyboard-nav {
    display: none;
  }

  .slide {
    display: block !important;
    page-break-after: always;
    min-height: auto;
    padding: var(--space-20);
  }
}

/* Animation utilities */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.fade-in {
  animation: fadeInUp 0.5s ease-out forwards;
}

.pulse {
  animation: pulse 0.5s ease-in-out;
}

/* Special mathematical content styling */
.calculation {
  font-family: var(--font-family-mono);
  background: var(--color-bg-7);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  margin: var(--space-12) 0;
}

.calculation p {
  font-size: 28px;
  margin: var(--space-8) 0;
  text-align: center;
}

/* Constraint examples */
.constraints {
  background: var(--color-bg-8);
  padding: var(--space-20);
  border-radius: var(--radius-base);
  margin: var(--space-16) 0;
}

.constraints p {
  font-size: 28px;
  margin: var(--space-12) 0;
}

/* Factorial information */
.factorial-info {
  background: var(--color-bg-1);
  padding: var(--space-20);
  border-radius: var(--radius-base);
  margin: var(--space-16) 0;
}

.factorial-examples p {
  font-size: 28px;
  margin: var(--space-8) 0;
  text-align: center;
  font-family: var(--font-family-mono);
}

/* Comparison boxes */
.comparison {
  background: var(--color-bg-4);
  padding: var(--space-12);
  border-radius: var(--radius-base);
  margin: var(--space-8) 0;
}

.comparison p {
  font-size: 28px;
  margin: var(--space-4) 0;
  text-align: center;
}

/* Expansion steps */
.expansion-steps {
  background: var(--color-surface);
  padding: var(--space-20);
  border-radius: var(--radius-base);
  margin: var(--space-16) 0;
}

.expansion-steps p {
  font-size: 28px;
  margin: var(--space-12) 0;
}

/* Ensure all interactive elements meet minimum size requirements */
.btn,
button,
input,
.quiz-option,
.choice-btn {
  min-height: 44px;
  min-width: 44px;
}

/* Ensure proper spacing for readability */
* + * {
  margin-top: var(--space-12);
}

h1 + *,
h2 + *,
h3 + *,
h4 + * {
  margin-top: var(--space-16);
}

/* Reference Cards */
.reference-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-20);
}

.ref-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-16);
    margin-bottom: var(--space-20);
}

.ref-card {
    background: var(--color-surface);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-20);
    text-align: center;
    transition: transform var(--duration-normal) var(--ease-standard);
}

.ref-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.ref-card h4 {
    color: var(--color-primary);
    margin-bottom: var(--space-12);
    font-size: clamp(28px, 3.2vw, 32px);
}

.ref-card p {
    font-size: clamp(28px, 3vw, 32px);
    margin-bottom: var(--space-8);
    color: var(--color-text);
}

.use-case {
    font-size: clamp(28px, 2.8vw, 30px);
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Quiz Progress */
.quiz-progress {
    margin-top: var(--space-20);
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--color-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-12);
}

.progress-fill {
    height: 100%;
    background: var(--color-primary);
    width: 0%;
    transition: width var(--duration-normal) var(--ease-standard);
}

/* Mastery Checklist */
.mastery-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-24);
}

.checklist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-16);
}

.mastery-item {
    display: flex;
    align-items: center;
    gap: var(--space-16);
    background: var(--color-surface);
    padding: var(--space-16);
    border-radius: var(--radius-base);
    border-left: 4px solid var(--color-success);
}

.check-icon {
    font-size: 48px;
    color: var(--color-success);
    font-weight: var(--font-weight-bold);
}

.mastery-text h4 {
    margin-bottom: var(--space-8);
    font-size: clamp(28px, 3vw, 30px);
}

.mastery-text p {
    font-size: clamp(28px, 2.8vw, 30px);
    margin: 0;
}

/* Key Insights */
.key-insights {
    background: var(--color-bg-1);
    border-radius: var(--radius-lg);
    padding: var(--space-24);
}

.key-insights h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-16);
    font-size: clamp(32px, 3.8vw, 36px);
}

.insights-box {
    background: var(--color-bg-3);
    padding: var(--space-20);
    border-radius: var(--radius-base);
}

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

.insight-list li {
    padding: var(--space-12) 0;
    border-bottom: 1px solid var(--color-border);
    font-size: clamp(28px, 2.8vw, 30px);
}

.insight-list li:last-child {
    border-bottom: none;
}

.insight-list strong {
    color: var(--color-primary);
}

/* Final Thanks */
.final-thanks {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
}

.thanks-content {
    max-width: 800px;
    width: 100%;
}

.thanks-content h2 {
    font-size: clamp(48px, 6vw, 60px);
    color: var(--color-primary);
    margin-bottom: var(--space-12);
}

.thanks-subtitle {
    font-size: clamp(32px, 4vw, 36px);
    margin-bottom: var(--space-24);
    color: var(--color-text-secondary);
}

.achievement-badge {
    background: var(--color-bg-1);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-24);
    margin: var(--space-24) 0;
    display: flex;
    justify-content: center;
}

.badge-content {
    display: flex;
    align-items: center;
    gap: var(--space-20);
}

.badge-icon {
    font-size: 60px;
}

.badge-text {
    color: var(--color-text);
}

.badge-text h3 {
    font-size: clamp(28px, 3.5vw, 32px);
    margin-bottom: var(--space-8);
}

.badge-text p {
    font-size: clamp(28px, 2.8vw, 30px);
    margin: 0;
}

/* Next Steps */
.next-steps {
    margin: var(--space-24) 0;
}

.next-steps h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-16);
    font-size: clamp(32px, 3.8vw, 36px);
}

.next-steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-16);
    margin: var(--space-20) 0;
}

.step-card {
    background: var(--color-surface);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-base);
    padding: var(--space-20);
    text-align: center;
    transition: transform var(--duration-normal) var(--ease-standard), border-color var(--duration-normal) var(--ease-standard);
}

.step-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-primary);
}

.step-card h4 {
    color: var(--color-primary);
    margin-bottom: var(--space-12);
    font-size: clamp(28px, 3vw, 30px);
}

.step-card p {
    font-size: clamp(28px, 2.8vw, 30px);
    color: var(--color-text-secondary);
    line-height: 1.3;
    margin: 0;
}

.final-message {
    background: var(--color-bg-3);
    padding: var(--space-20);
    border-radius: var(--radius-base);
    margin: var(--space-20) 0;
}

.final-message p {
    font-size: clamp(28px, 3vw, 32px);
    margin: 0;
}

.final-message strong {
    color: var(--color-primary);
}

.questions-section {
    background: var(--color-bg-1);
    border-radius: var(--radius-lg);
    padding: var(--space-24);
    margin-top: var(--space-24);
}

.questions-section h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-12);
    font-size: clamp(32px, 3.8vw, 36px);
}

.questions-section p {
    font-size: clamp(28px, 3vw, 32px);
    color: var(--color-text);
    margin: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .ref-grid {
        grid-template-columns: 1fr;
    }
    
    .checklist-grid {
        grid-template-columns: 1fr;
    }
    
    .next-steps-grid {
        grid-template-columns: 1fr;
    }
    
    .badge-content {
        flex-direction: column;
        gap: var(--space-12);
    }
}

/* Mastery Slide - Wide Layout */
.mastery-slide-content {
    max-width: 95vw !important;
    width: 95vw !important;
    overflow-x: visible !important;
}

.mastery-content-wide {
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
    width: 100%;
    max-width: none;
}

.mastery-checklist-wide {
    width: 100%;
    max-width: none;
}

.checklist-grid-wide {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-12);
    width: 100%;
    max-width: none;
}

.key-insights-wide {
    background: var(--color-bg-1);
    border-radius: var(--radius-lg);
    padding: var(--space-20);
    width: 100%;
    max-width: none;
}

.key-insights-wide h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-16);
    font-size: clamp(32px, 3.8vw, 36px);
}

.insights-box-wide {
    background: var(--color-bg-3);
    padding: var(--space-16);
    border-radius: var(--radius-base);
}

/* Responsive adjustments for mastery slide */
@media (max-width: 1200px) {
    .checklist-grid-wide {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-16);
    }
}

@media (max-width: 768px) {
    .checklist-grid-wide {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .mastery-slide-content {
        max-width: 98vw !important;
        width: 98vw !important;
    }
}

@media (max-height: 600px) {
    .mastery-content-wide {
        gap: var(--space-8);
    }
    
    .key-insights-wide {
        padding: var(--space-12);
    }
    
    .insights-box-wide {
        padding: var(--space-12);
    }
}

/* Wide Layout Classes - Apply to slides that need more space */
.wide-slide-content {
    max-width: 95vw !important;
    width: 95vw !important;
    overflow-x: visible !important;
}

.extra-wide-slide-content {
    max-width: 98vw !important;
    width: 98vw !important;
    overflow-x: visible !important;
}

/* Wide content containers */
.content-wide {
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
    width: 100%;
    max-width: none;
}

/* Wide grids */
.grid-wide {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-12);
    width: 100%;
    max-width: none;
}

.grid-extra-wide {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
    width: 100%;
    max-width: none;
}

/* Wide theory content */
.theory-content-wide {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    width: 100%;
    max-width: none;
}

/* Wide application content */
.application-content-wide {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    width: 100%;
    max-width: none;
}

.application-content-wide .investment-example,
.application-content-wide .investment-calculator,
.application-content-wide .constraint-example,
.application-content-wide .method-box,
.application-content-wide .student-activity {
    width: 100%;
    max-width: none;
}

/* Wide visual demonstration elements */
.visual-demo-wide .stars-bars-visual,
.visual-demo-wide .visual-representation,
.example-wide .visual-representation {
    width: 100%;
    max-width: none;
    overflow-x: visible;
}

/* Calculator inputs for wide layouts */
.calc-inputs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
    width: 100%;
}

/* Wide calculators */
.calculator-wide {
    background: var(--color-surface);
    padding: var(--space-16);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    width: 100%;
    max-width: none;
}

.calc-inputs-wide {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-16);
    margin-bottom: var(--space-16);
    width: 100%;
}

/* Wide examples */
.example-wide {
    background: var(--color-surface);
    padding: var(--space-20);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    width: 100%;
    max-width: none;
}

/* Wide quiz content */
.quiz-content-wide {
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
    width: 100%;
    max-width: none;
}

.quiz-options-wide {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-12);
    width: 100%;
}

/* Wide visual demos */
.visual-demo-wide {
    background: var(--color-bg-2);
    padding: var(--space-12);
    border-radius: var(--radius-base);
    margin: var(--space-8) 0;
    width: 100%;
    max-width: none;
}

/* Wide interactive content */
.interactive-wide {
    background: var(--color-surface);
    padding: var(--space-20);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    width: 100%;
    max-width: none;
}

/* Responsive adjustments for wide layouts */
@media (max-width: 1400px) {
    .grid-wide {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    }
    
    .grid-extra-wide {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

@media (max-width: 1200px) {
    .grid-wide {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .grid-extra-wide {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
    
    .calc-inputs-wide {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

@media (max-width: 768px) {
    .wide-slide-content,
    .extra-wide-slide-content {
        max-width: 98vw !important;
        width: 98vw !important;
    }
    
    .grid-wide,
    .grid-extra-wide {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .calc-inputs-wide {
        grid-template-columns: 1fr;
    }
    
    .quiz-options-wide {
        grid-template-columns: 1fr;
    }
}

@media (max-height: 600px) {
    .content-wide {
        gap: var(--space-8);
    }
    
    .theory-content-wide {
        gap: var(--space-6);
    }
}

/* Enhanced mobile support for wide layouts */
@media (max-width: 480px) {
    .wide-slide-content,
    .extra-wide-slide-content {
        max-width: 99vw !important;
        width: 99vw !important;
        padding: var(--space-8) !important;
    }
    
    .theory-content-wide,
    .application-content-wide {
        gap: var(--space-4);
        width: 99vw !important;
        max-width: 99vw !important;
    }
    
    .visual-demo-wide,
    .example-wide {
        width: 99vw !important;
        max-width: 99vw !important;
    }
    
    .next-steps-grid {
        grid-template-columns: 1fr !important;
        gap: var(--space-8);
    }
    
    .step-card {
        padding: var(--space-12) !important;
    }
    
    .visual-representation p {
        font-size: clamp(26px, 4vw, 30px) !important;
    }
}

/* Fix for very small height screens */
@media (max-height: 500px) {
    .final-thanks {
        padding: var(--space-8);
    }
    
    .achievement-badge {
        margin: var(--space-12) 0;
        padding: var(--space-16);
    }
    
    .next-steps {
        margin: var(--space-12) 0;
    }
    
    .questions-section {
        margin-top: var(--space-12);
        padding: var(--space-16);
    }
}