: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: 12px;
  --font-size-sm: 13px;
  --font-size-base: 15px;
  --font-size-md: 15px;
  --font-size-lg: 17px;
  --font-size-xl: 18px;
  --font-size-2xl: 21px;
  --font-size-3xl: 25px;
  --font-size-4xl: 31px;
  --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 */
/* Animations subtiles personnalisées */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes gentleFloat {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-5px);
  }
}

@keyframes subtlePulse {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

@keyframes scrollArrow {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(8px);
  }
}

@keyframes textSlide {
  0% {
    opacity: 0;
    transform: translateY(15px);
  }
  20%, 80% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateY(-15px);
  }
}

@keyframes particleFloat {
  0% {
    transform: translateY(0) translateX(0);
    opacity: 0.3;
  }
  50% {
    opacity: 0.8;
  }
  100% {
    transform: translateY(-100px) translateX(20px);
    opacity: 0;
  }
}

/* Variables de thème personnalisées */
:root {
  /* Mode clair corrigé - palette douce et élégante */
  --idbook-light-primary: #ffffff;
  --idbook-light-secondary: #f8fafc;
  --idbook-light-tertiary: #f1f5f9;
  --idbook-light-accent: #3b82f6;
  --idbook-light-accent-gold: #d4af37;
  --idbook-light-text: #1e293b;
  --idbook-light-text-muted: #64748b;
  --idbook-light-text-light: #94a3b8;
  --idbook-light-border: rgba(203, 213, 225, 0.4);
  --idbook-light-card-bg: rgba(255, 255, 255, 0.9);
  --idbook-light-glass: rgba(255, 255, 255, 0.7);

  /* Mode sombre */
  --idbook-dark-primary: #0f0f23;
  --idbook-dark-secondary: #1a1a2e;
  --idbook-dark-accent: #4a9eff;
  --idbook-dark-accent-gold: #d4af37;
  --idbook-dark-text: #ffffff;
  --idbook-dark-text-muted: #b0b0b0;
  --idbook-dark-border: rgba(255, 255, 255, 0.1);
  --idbook-dark-card-bg: rgba(255, 255, 255, 0.05);
  --idbook-dark-glass: rgba(255, 255, 255, 0.05);

  /* Variables actuelles (mode clair par défaut) */
  --current-bg-primary: var(--idbook-light-primary);
  --current-bg-secondary: var(--idbook-light-secondary);
  --current-bg-tertiary: var(--idbook-light-tertiary);
  --current-accent: var(--idbook-light-accent);
  --current-accent-gold: var(--idbook-light-accent-gold);
  --current-text: var(--idbook-light-text);
  --current-text-muted: var(--idbook-light-text-muted);
  --current-text-light: var(--idbook-light-text-light);
  --current-border: var(--idbook-light-border);
  --current-card-bg: var(--idbook-light-card-bg);
  --current-glass: var(--idbook-light-glass);
}

/* Mode sombre */
[data-theme="dark"] {
  --current-bg-primary: var(--idbook-dark-primary);
  --current-bg-secondary: var(--idbook-dark-secondary);
  --current-bg-tertiary: var(--idbook-dark-secondary);
  --current-accent: var(--idbook-dark-accent);
  --current-accent-gold: var(--idbook-dark-accent-gold);
  --current-text: var(--idbook-dark-text);
  --current-text-muted: var(--idbook-dark-text-muted);
  --current-text-light: var(--idbook-dark-text-muted);
  --current-border: var(--idbook-dark-border);
  --current-card-bg: var(--idbook-dark-card-bg);
  --current-glass: var(--idbook-dark-glass);
}

/* Reset et base */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  background: linear-gradient(135deg, var(--current-bg-primary) 0%, var(--current-bg-secondary) 100%);
  color: var(--current-text);
  overflow-x: hidden;
  transition: all var(--duration-normal) var(--ease-standard);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all var(--duration-normal) var(--ease-standard);
  border-bottom: 1px solid var(--current-border);
}

[data-theme="dark"] .navbar {
  background: rgba(15, 15, 35, 0.95);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-16);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.logo-text {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--current-accent-gold);
  margin: 0;
  letter-spacing: -0.02em;
  transition: color var(--duration-fast) var(--ease-standard);
}

.logo-accent {
  font-size: var(--font-size-xs);
  color: var(--current-text-muted);
  margin-top: -2px;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-32);
}

.nav-menu li {
  display: flex;
}

.nav-link {
  color: var(--current-text);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--space-8) var(--space-12);
  border-radius: var(--radius-base);
  position: relative;
  transition: all var(--duration-fast) var(--ease-standard);
}

.nav-link:hover {
  color: var(--current-accent);
  background: var(--current-glass);
}

.nav-link.auth-primary {
  background: var(--current-accent);
  color: white;
}

.nav-link.auth-primary:hover {
  background: var(--current-accent);
  opacity: 0.9;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.theme-toggle {
  background: var(--current-glass);
  border: 1px solid var(--current-border);
  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);
}

.theme-toggle:hover {
  background: var(--current-accent);
  color: white;
}

.login-simulator {
  background: var(--current-accent);
  color: white;
  border: none;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
}

.login-simulator:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.bar {
  width: 25px;
  height: 3px;
  background: var(--current-text);
  margin: 3px 0;
  transition: var(--duration-fast);
}

/* Section Héro subtile */
.hero-section {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--current-bg-primary) 0%, var(--current-bg-secondary) 50%, var(--current-bg-tertiary) 100%);
  z-index: -2;
}

.subtle-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
}

.subtle-particles::before,
.subtle-particles::after {
  content: '';
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--current-accent-gold);
  border-radius: 50%;
  opacity: 0.3;
  animation: particleFloat 8s infinite linear;
}

.subtle-particles::before {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.subtle-particles::after {
  top: 60%;
  left: 80%;
  animation-delay: 4s;
}

.hero-content {
  max-width: 800px;
  padding: 0 var(--space-16);
  margin-top: 70px;
  animation: fadeInUp 1s var(--ease-standard);
}

.hero-title {
  font-size: 4rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-16);
  color: var(--current-text);
  animation: fadeInUp 1s var(--ease-standard) 0.2s both;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--current-text-muted);
  margin-bottom: var(--space-32);
  animation: fadeInUp 1s var(--ease-standard) 0.4s both;
}

.scroll-text-container {
  margin-top: var(--space-32);
  height: 60px;
  overflow: hidden;
  position: relative;
  animation: fadeInUp 1s var(--ease-standard) 0.6s both;
}

.scroll-text {
  position: relative;
  height: 100%;
}

.scroll-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  color: var(--current-accent-gold);
  font-style: italic;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.8s var(--ease-standard);
}

.scroll-item.active {
  opacity: 1;
  transform: translateY(0);
}

.scroll-indicator {
  position: absolute;
  bottom: var(--space-32);
  left: 50%;
  transform: translateX(-50%);
  animation: fadeInUp 1s var(--ease-standard) 0.8s both;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border: 2px solid var(--current-accent);
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
  animation: scrollArrow 2s infinite;
}

/* Sections générales */
section {
  padding: 100px 0;
  position: relative;
}

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

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--current-text);
  margin-bottom: var(--space-16);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--current-text-muted);
}

/* Section Livre Vedette */
.featured-book-section {
  background: var(--current-bg-secondary);
}

.featured-book-card {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-32);
  background: var(--current-card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: var(--space-32);
  border: 1px solid var(--current-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-standard);
}

.featured-book-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.book-cover {
  display: flex;
  align-items: center;
  justify-content: center;
}

.book-placeholder {
  width: 200px;
  height: 280px;
  background: linear-gradient(135deg, var(--current-accent) 0%, var(--current-accent-gold) 100%);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--duration-normal) var(--ease-standard);
}

.book-placeholder:hover {
  transform: scale(1.05);
}

.book-placeholder img {
  width: 100%;
  height: auto;
  margin-bottom: var(--space-16);
}

.book-icon {
  font-size: 60px;
  margin-bottom: var(--space-16);
}

.book-title {
  color: white;
  font-size: var(--font-size-xl);
  text-align: center;
  margin: 0;
  font-weight: var(--font-weight-bold);
}

.book-details {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.book-main-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--current-accent-gold);
  margin-bottom: var(--space-8);
}

.book-subtitle {
  font-size: var(--font-size-xl);
  color: var(--current-text);
  margin-bottom: var(--space-24);
  font-weight: var(--font-weight-normal);
}

.book-description {
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--current-text-muted);
  margin-bottom: var(--space-32);
}

.book-cta {
  background: var(--current-accent);
  color: white;
  border: none;
  padding: var(--space-16) var(--space-32);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
}

.book-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--color-accent);
}

/* Section Fonctionnalités de lecture */
.reading-features-section {
  background: var(--current-bg-tertiary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-32);
}

.feature-card {
  background: var(--current-card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: var(--space-32);
  text-align: center;
  border: 1px solid var(--current-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-standard);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.feature-card[data-color="blue"]:hover {
  border-color: var(--color-bg-1);
  background: var(--color-bg-1);
}

.feature-card[data-color="purple"]:hover {
  border-color: var(--color-bg-5);
  background: var(--color-bg-5);
}

.feature-card[data-color="gold"]:hover {
  border-color: var(--color-bg-2);
  background: var(--color-bg-2);
}

.feature-icon {
  font-size: 50px;
  margin-bottom: var(--space-16);
  animation: gentleFloat 4s ease-in-out infinite;
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--current-text);
  margin-bottom: var(--space-16);
}

.feature-description {
  color: var(--current-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-24);
}

.feature-animation-text {
  min-height: 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.animate-text {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  font-size: var(--font-size-sm);
  color: var(--current-accent);
  font-style: italic;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.6s var(--ease-standard);
}

.animate-text.active {
  opacity: 1;
  transform: translateY(0);
}

/* Section À Propos */
.about-section {
  background: var(--current-bg-primary);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
  align-items: center;
}

.about-description {
  font-size: var(--font-size-lg);
  line-height: 1.7;
  color: var(--current-text-muted);
  margin-bottom: var(--space-24);
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-24);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  padding: var(--space-16);
  background: var(--current-glass);
  border-radius: var(--radius-md);
  border: 1px solid var(--current-border);
  transition: all var(--duration-fast) var(--ease-standard);
}

.feature-item:hover {
  transform: translateX(5px);
  background: var(--current-card-bg);
}

.feature-item .feature-icon {
  font-size: 30px;
  min-width: 50px;
  animation: none;
}

.feature-item h4 {
  color: var(--current-text);
  margin: 0 0 var(--space-4) 0;
  font-size: var(--font-size-lg);
}

.feature-item p {
  color: var(--current-text-muted);
  margin: 0;
}

/* Footer */
.footer {
  background: var(--current-bg-secondary);
  padding: var(--space-32) 0 var(--space-16) 0;
  border-top: 1px solid var(--current-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
  margin-bottom: var(--space-24);
}

.footer-logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--current-accent-gold);
  margin: 0 0 var(--space-8) 0;
}

.footer-slogan {
  color: var(--current-text-muted);
  margin: 0;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-24);
}

.footer-column h4 {
  color: var(--current-text);
  margin-bottom: var(--space-12);
  font-size: var(--font-size-lg);
}

.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-column li {
  margin-bottom: var(--space-8);
}

.footer-column a {
  color: var(--current-text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

.footer-column a:hover {
  color: var(--current-accent);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-16);
  border-top: 1px solid var(--current-border);
}

.footer-bottom p {
  color: var(--current-text-muted);
  margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: var(--current-card-bg);
    backdrop-filter: blur(10px);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    padding: var(--space-24) 0;
    gap: var(--space-16);
    border-top: 1px solid var(--current-border);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-actions {
    order: -1;
    margin-right: var(--space-16);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
  }

  .featured-book-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .book-placeholder {
    width: 150px;
    height: 210px;
  }

  .nav-container {
    padding: 0 var(--space-12);
  }
}

/* Animation des ondes audio translucides prenant toute la section */
#audio-waves-animation {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: visible;
}

.hero-section {
  position: relative;
  min-height: 100vh;
  width: 100%;
  overflow: hidden;
}

/* Les ondes SVG elles-mêmes */
.audio-wave {
  position: absolute;
  left: 0;
  width: 100vw;
  /* plus de height: 35vh; ici ! le JS s’en occupe via le vrai calcul pixel */
  stroke: var(--current-accent-gold);
  opacity: 0.16;
  filter: blur(2px);
  will-change: transform, opacity;
  transition: stroke 0.4s;
  pointer-events: none;
}

/* Couleur d'onde pour le mode sombre */
[data-theme="dark"] .audio-wave { stroke: var(--idbook-dark-accent-gold); }
[data-theme="light"] .audio-wave { stroke: var(--idbook-light-accent-gold); }

/* Animation de mouvement des ondes */
@keyframes waveMove {
  0% { transform: translateY(0) scaleX(1);}
  50% { transform: translateY(25px) scaleX(1.06);}
  100% { transform: translateY(0) scaleX(1);}
}

/* État initial caché pour les éléments révélés au scroll */
.section-header,
.featured-book-card,
.feature-card,
.about-content,
.feature-item {
opacity: 0;
transform: translateY(16px);
will-change: opacity, transform;
}

/* Quand la classe est ajoutée par l’IO, on joue l'anim */
.section-header.animate-in,
.featured-book-card.animate-in,
.feature-card.animate-in,
.about-content.animate-in {
animation: fadeInUp 0.8s ease-out forwards;
}

.feature-item.animate-in {
animation: slideInLeft 0.8s ease-out forwards;
}